/* roulang page: index */
:root {
            --polar-dark: #102126;
            --ice-blue: #9FD7E5;
            --accent-orange: #FF5A26;
            --accent-orange-hover: #E64A18;
            --snow-ice: #D8EFF3;
            --ice-mist: #F5F9FA;
            --line-border: #E5EDEF;
            --text-primary: #1A2A2F;
            --text-secondary: #4B5E63;
            --text-muted: #7A8C90;
            --card-radius: 10px;
            --btn-radius: 6px;
            --badge-radius: 4px;
            --shadow-card: 0 2px 8px rgba(16, 33, 38, .06);
            --shadow-card-hover: 0 8px 24px rgba(16, 33, 38, .12);
            --font-title: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
            --font-body: "Noto Sans SC", "Source Han Sans SC", "Microsoft YaHei", sans-serif;
            --max-width: 1200px;
            --section-padding: 80px 0;
            --section-padding-mobile: 48px 0;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: var(--font-body);
            font-size: 16px;
            line-height: 1.75;
            color: var(--text-primary);
            background-color: var(--ice-mist);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border: 0;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: color .2s ease, background-color .2s ease, border-color .2s ease;
        }

        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        textarea:focus-visible,
        select:focus-visible {
            outline: 2px solid var(--ice-blue);
            outline-offset: 2px;
        }

        ul,
        ol {
            list-style: none;
        }

        button,
        input,
        textarea,
        select {
            font-family: var(--font-body);
            font-size: 16px;
        }

        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        .section {
            padding: var(--section-padding);
        }

        .section--dark {
            background-color: var(--polar-dark);
            color: #F5F9FA;
        }

        .section--snow {
            background-color: var(--snow-ice);
        }

        .section--light {
            background-color: #fff;
        }

        .section__heading {
            font-family: var(--font-title);
            font-size: clamp(26px, 4vw, 34px);
            font-weight: 700;
            line-height: 1.35;
            letter-spacing: .015em;
            color: var(--text-primary);
            margin-bottom: 16px;
        }

        .section__heading--white {
            color: #fff;
        }

        .section__subheading {
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-secondary);
            max-width: 720px;
            margin-bottom: 40px;
        }

        .section__subheading--white {
            color: var(--snow-ice);
        }

        .section__label {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            color: var(--accent-orange);
            letter-spacing: .06em;
            text-transform: uppercase;
            margin-bottom: 12px;
        }

        .section__label--ice {
            color: var(--ice-blue);
        }

        /* Navigation */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 999;
            transition: background-color .3s ease, box-shadow .3s ease, backdrop-filter .3s ease;
            background: rgba(16, 33, 38, .35);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(255, 255, 255, .2);
            box-shadow: 0 1px 0 rgba(255, 255, 255, .15) inset;
        }

        .site-header.is-scrolled {
            background: #102126;
            box-shadow: 0 4px 16px rgba(0, 0, 0, .2);
            border-bottom: 1px solid var(--ice-blue);
        }

        .site-header .nav-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            min-height: 64px;
            gap: 16px;
        }

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }

        .nav-logo__icon {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--ice-blue), var(--snow-ice));
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
        }

        .nav-logo__icon i {
            color: var(--polar-dark);
            font-size: 18px;
        }

        .nav-logo__text {
            font-family: var(--font-title);
            font-size: 19px;
            font-weight: 700;
            color: #F5F9FA;
            letter-spacing: .02em;
            white-space: nowrap;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 4px;
        }

        .nav-links a {
            display: inline-block;
            padding: 8px 12px;
            font-size: 14.5px;
            font-weight: 500;
            color: #F5F9FA;
            position: relative;
            white-space: nowrap;
            letter-spacing: .01em;
        }

        .nav-links a:hover {
            color: var(--ice-blue);
        }

        .nav-links a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 12px;
            right: 12px;
            height: 2px;
            background-color: var(--accent-orange);
            border-radius: 1px;
        }

        .nav-links a.active {
            color: #fff;
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }

        .nav-search-icon {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            border: 1px solid rgba(255, 255, 255, .4);
            background: transparent;
            color: #F5F9FA;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: border-color .2s ease, color .2s ease;
        }

        .nav-search-icon:hover {
            border-color: var(--ice-blue);
            color: var(--ice-blue);
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 10px 20px;
            font-size: 15px;
            font-weight: 600;
            font-family: var(--font-body);
            border-radius: var(--btn-radius);
            border: none;
            cursor: pointer;
            line-height: 1.4;
            letter-spacing: .01em;
            transition: background-color .2s ease, color .2s ease, border-color .2s ease, transform .2s ease, box-shadow .2s ease;
        }

        .btn:hover {
            transform: translateY(-2px);
        }

        .btn:active {
            transform: translateY(0);
        }

        .btn--primary {
            background-color: var(--accent-orange);
            color: #fff;
        }

        .btn--primary:hover {
            background-color: var(--accent-orange-hover);
            color: #fff;
            box-shadow: 0 4px 14px rgba(255, 90, 38, .3);
        }

        .btn--outline {
            background: transparent;
            color: var(--text-primary);
            border: 1.5px solid var(--text-primary);
        }

        .btn--outline:hover {
            background-color: var(--text-primary);
            color: #fff;
            border-color: var(--text-primary);
        }

        .btn--outline-white {
            background: transparent;
            color: #fff;
            border: 1.5px solid rgba(255, 255, 255, .7);
        }

        .btn--outline-white:hover {
            background-color: #fff;
            color: var(--polar-dark);
            border-color: #fff;
        }

        .btn--nav-cta {
            background-color: var(--accent-orange);
            color: #fff;
            padding: 8px 16px;
            font-size: 14px;
            border-radius: var(--btn-radius);
            font-weight: 600;
            white-space: nowrap;
        }

        .btn--nav-cta:hover {
            background-color: var(--accent-orange-hover);
            color: #fff;
            transform: translateY(-1px);
        }

        .hamburger {
            display: none;
            width: 40px;
            height: 40px;
            border: 1px solid rgba(255, 255, 255, .4);
            border-radius: 6px;
            background: transparent;
            color: #fff;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            flex-shrink: 0;
            font-size: 20px;
            transition: border-color .2s ease;
        }

        .hamburger:hover {
            border-color: var(--ice-blue);
            color: var(--ice-blue);
        }

        .mobile-menu {
            display: none;
            position: fixed;
            top: 64px;
            left: 0;
            right: 0;
            background: #102126;
            padding: 16px 24px 24px;
            z-index: 998;
            border-bottom: 1px solid rgba(255, 255, 255, .15);
            box-shadow: 0 8px 24px rgba(0, 0, 0, .25);
        }

        .mobile-menu.is-open {
            display: block;
        }

        .mobile-menu a {
            display: block;
            padding: 12px 8px;
            font-size: 16px;
            color: #F5F9FA;
            border-bottom: 1px solid rgba(255, 255, 255, .1);
            letter-spacing: .01em;
        }

        .mobile-menu a:last-child {
            border-bottom: none;
        }

        .mobile-menu a:hover {
            color: var(--ice-blue);
        }

        .mobile-menu a.active {
            color: var(--accent-orange);
        }

        /* Hero */
        .hero {
            min-height: 100vh;
            position: relative;
            display: flex;
            align-items: center;
            background-image: url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            padding: 130px 0 80px;
            overflow: hidden;
        }

        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(16, 33, 38, .85) 0%, rgba(16, 33, 38, .55) 60%, rgba(255, 90, 38, .25) 100%);
            z-index: 1;
        }

        .hero .container {
            position: relative;
            z-index: 2;
        }

        .hero__content {
            max-width: 720px;
        }

        .hero__badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 90, 38, .9);
            color: #fff;
            font-size: 13px;
            font-weight: 600;
            padding: 6px 14px;
            border-radius: 20px;
            letter-spacing: .05em;
            margin-bottom: 20px;
        }

        .hero__badge i {
            font-size: 12px;
        }

        .hero__title {
            font-family: var(--font-title);
            font-size: clamp(28px, 5vw, 46px);
            font-weight: 800;
            line-height: 1.25;
            letter-spacing: .02em;
            color: #fff;
            margin-bottom: 20px;
        }

        .hero__subtitle {
            font-size: clamp(16px, 1.8vw, 19px);
            line-height: 1.7;
            color: #D8EFF3;
            margin-bottom: 32px;
            max-width: 620px;
        }

        .hero__actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            margin-bottom: 40px;
        }

        .hero__data-row {
            display: flex;
            flex-wrap: wrap;
            gap: 28px;
            align-items: center;
        }

        .hero__data-item {
            display: flex;
            align-items: baseline;
            gap: 6px;
        }

        .hero__data-number {
            font-family: var(--font-title);
            font-size: 26px;
            font-weight: 800;
            color: var(--accent-orange);
            letter-spacing: .01em;
        }

        .hero__data-label {
            font-size: 13px;
            color: var(--snow-ice);
            white-space: nowrap;
        }

        .hero__scroll-indicator {
            position: absolute;
            bottom: 32px;
            left: 50%;
            transform: translateX(-50%);
            z-index: 2;
            color: var(--ice-blue);
            font-size: 24px;
            animation: bounceDown 2s ease-in-out infinite;
        }

        @keyframes bounceDown {
            0%, 100% { transform: translateX(-50%) translateY(0); }
            50% { transform: translateX(-50%) translateY(8px); }
        }

        /* Brand intro */
        .brand-intro {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }

        .brand-intro__image {
            border-radius: var(--card-radius);
            overflow: hidden;
            box-shadow: var(--shadow-card-hover);
        }

        .brand-intro__image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            aspect-ratio: 4/3;
        }

        .brand-intro__text p {
            color: var(--text-secondary);
            font-size: 15.5px;
            line-height: 1.85;
            margin-bottom: 12px;
        }

        .brand-intro__text p:last-child {
            margin-bottom: 0;
        }

        /* Services */
        .services-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
        }

        .services-grid .service-card--wide {
            grid-row: span 2;
        }

        .service-card {
            background: #fff;
            border: 1px solid var(--line-border);
            border-radius: var(--card-radius);
            box-shadow: var(--shadow-card);
            overflow: hidden;
            cursor: pointer;
            position: relative;
            transition: transform .35s ease, box-shadow .35s ease, border-color .35s ease;
        }

        .service-card::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 30%;
            height: 3px;
            background-color: var(--ice-blue);
            transition: width .4s ease;
        }

        .service-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-card-hover);
            border-color: var(--ice-blue);
        }

        .service-card:hover::after {
            width: 100%;
        }

        .service-card:hover .service-card__title {
            color: var(--accent-orange);
        }

        .service-card__image {
            aspect-ratio: 16/9;
            overflow: hidden;
            background-color: var(--snow-ice);
        }

        .service-card__image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .4s ease;
        }

        .service-card:hover .service-card__image img {
            transform: scale(1.04);
        }

        .service-card__body {
            padding: 20px;
        }

        .service-card__title {
            font-family: var(--font-title);
            font-size: 17px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 8px;
            line-height: 1.45;
            transition: color .3s ease;
        }

        .service-card__summary {
            font-size: 14.5px;
            line-height: 1.7;
            color: var(--text-secondary);
            margin-bottom: 12px;
        }

        .service-card__link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            font-weight: 600;
            color: var(--accent-orange);
            cursor: pointer;
        }

        .service-card__link i {
            font-size: 12px;
            transition: transform .25s ease;
        }

        .service-card:hover .service-card__link i {
            transform: translateX(4px);
        }

        .service-card__badge {
            display: inline-block;
            background: var(--snow-ice);
            color: var(--text-secondary);
            font-size: 12px;
            font-weight: 600;
            padding: 3px 10px;
            border-radius: var(--badge-radius);
            margin-bottom: 12px;
            letter-spacing: .03em;
        }

        /* Stats band */
        .stats-band {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            text-align: center;
        }

        .stats-band .stat-item {
            padding: 20px 10px;
            position: relative;
        }

        .stats-band .stat-item:not(:last-child)::after {
            content: '';
            position: absolute;
            right: -10px;
            top: 50%;
            transform: translateY(-50%);
            width: 1px;
            height: 48px;
            background-color: rgba(255, 255, 255, .18);
        }

        .stat-item__number {
            font-family: var(--font-title);
            font-size: clamp(28px, 3vw, 34px);
            font-weight: 800;
            color: var(--accent-orange);
            letter-spacing: .01em;
            display: block;
            margin-bottom: 6px;
        }

        .stat-item__label {
            font-size: 13px;
            color: var(--snow-ice);
            letter-spacing: .03em;
        }

        /* Deep content */
        .deep-content__body {
            max-width: 900px;
            margin: 0 auto;
        }

        .deep-content__body p {
            font-size: 15.5px;
            line-height: 1.9;
            color: var(--text-secondary);
            margin-bottom: 20px;
        }

        .deep-content__quote {
            border-left: 3px solid var(--accent-orange);
            background-color: var(--snow-ice);
            padding: 20px 24px;
            border-radius: 0 var(--card-radius) var(--card-radius) 0;
            margin: 28px 0;
            font-size: 15px;
            line-height: 1.8;
            color: var(--text-primary);
        }

        .deep-content__quote strong {
            color: var(--accent-orange);
            font-weight: 700;
        }

        /* Cases */
        .case-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 32px;
            align-items: center;
            margin-bottom: 48px;
        }

        .case-row:last-child {
            margin-bottom: 0;
        }

        .case-row__image {
            border-radius: var(--card-radius);
            overflow: hidden;
            aspect-ratio: 16/10;
            box-shadow: var(--shadow-card-hover);
        }

        .case-row__image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .case-row__tag {
            display: inline-block;
            background: var(--ice-blue);
            color: var(--polar-dark);
            font-size: 12px;
            font-weight: 700;
            padding: 4px 12px;
            border-radius: var(--badge-radius);
            letter-spacing: .04em;
            margin-bottom: 12px;
        }

        .case-row__title {
            font-family: var(--font-title);
            font-size: 20px;
            font-weight: 700;
            line-height: 1.4;
            color: var(--text-primary);
            margin-bottom: 12px;
        }

        .case-row__summary {
            font-size: 15px;
            line-height: 1.75;
            color: var(--text-secondary);
            margin-bottom: 14px;
        }

        .case-row__result {
            font-size: 14px;
            font-weight: 700;
            color: var(--accent-orange);
            letter-spacing: .01em;
        }

        /* Plans */
        .plans-list {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        .plan-item {
            display: grid;
            grid-template-columns: 80px 1fr auto;
            gap: 24px;
            align-items: start;
            background: #fff;
            border: 1px solid var(--line-border);
            border-radius: var(--card-radius);
            padding: 24px 28px;
            box-shadow: var(--shadow-card);
            transition: border-color .3s ease, box-shadow .3s ease;
        }

        .plan-item:hover {
            border-color: var(--ice-blue);
            box-shadow: var(--shadow-card-hover);
        }

        .plan-item__num {
            font-family: var(--font-title);
            font-size: 36px;
            font-weight: 800;
            color: var(--ice-blue);
            letter-spacing: .02em;
            line-height: 1;
        }

        .plan-item__title {
            font-family: var(--font-title);
            font-size: 18px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 8px;
        }

        .plan-item__desc {
            font-size: 15px;
            line-height: 1.75;
            color: var(--text-secondary);
        }

        /* News */
        .news-first {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 28px;
            align-items: center;
            background: #fff;
            border: 1px solid var(--line-border);
            border-radius: var(--card-radius);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            margin-bottom: 28px;
            transition: box-shadow .3s ease, transform .3s ease;
        }

        .news-first:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
        }

        .news-first__image {
            aspect-ratio: 16/9;
            overflow: hidden;
            background-color: var(--snow-ice);
        }

        .news-first__image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .news-first__body {
            padding: 24px;
        }

        .news-date {
            font-size: 13px;
            color: var(--text-muted);
            letter-spacing: .04em;
            display: block;
            margin-bottom: 8px;
        }

        .news-first__title {
            font-family: var(--font-title);
            font-size: 20px;
            font-weight: 700;
            line-height: 1.4;
            color: var(--text-primary);
            margin-bottom: 10px;
        }

        .news-first__summary {
            font-size: 14.5px;
            line-height: 1.75;
            color: var(--text-secondary);
            margin-bottom: 14px;
        }

        .btn--read-more {
            font-size: 14px;
            font-weight: 600;
            color: var(--accent-orange);
            cursor: pointer;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .btn--read-more i {
            font-size: 12px;
        }

        .news-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .news-list .news-item {
            display: grid;
            grid-template-columns: 100px 1fr auto;
            gap: 16px;
            align-items: center;
            background: #fff;
            padding: 16px 20px;
            border: 1px solid var(--line-border);
            border-radius: var(--card-radius);
            box-shadow: var(--shadow-card);
            transition: border-color .3s ease, box-shadow .3s ease;
        }

        .news-list .news-item:hover {
            border-color: var(--ice-blue);
            box-shadow: var(--shadow-card-hover);
        }

        .news-item__date {
            font-size: 13px;
            color: var(--text-muted);
            letter-spacing: .03em;
            white-space: nowrap;
        }

        .news-item__title {
            font-family: var(--font-title);
            font-size: 15.5px;
            font-weight: 600;
            color: var(--text-primary);
            line-height: 1.45;
            margin-bottom: 4px;
        }

        .news-item__summary {
            font-size: 14px;
            line-height: 1.65;
            color: var(--text-secondary);
        }

        /* Latest updates */
        .updates-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

        .update-card {
            background: #fff;
            border: 1px solid var(--line-border);
            border-radius: var(--card-radius);
            padding: 20px;
            box-shadow: var(--shadow-card);
            transition: transform .3s ease, shadow .3s ease, border-color .3s ease;
        }

        .update-card:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-card-hover);
            border-color: var(--ice-blue);
        }

        .update-card__icon {
            width: 44px;
            height: 44px;
            border-radius: 10px;
            background: var(--snow-ice);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            color: var(--accent-orange);
            margin-bottom: 14px;
        }

        .update-card__title {
            font-family: var(--font-title);
            font-size: 16px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 8px;
            line-height: 1.4;
        }

        .update-card__meta {
            font-size: 13px;
            color: var(--text-muted);
            margin-bottom: 8px;
            letter-spacing: .02em;
        }

        .update-card__desc {
            font-size: 14px;
            line-height: 1.7;
            color: var(--text-secondary);
        }

        /* FAQ */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
        }

        .faq-item {
            background: #fff;
            border: 1px solid var(--line-border);
            border-radius: var(--card-radius);
            margin-bottom: 12px;
            overflow: hidden;
            transition: background-color .3s ease, border-color .3s ease;
        }

        .faq-item.is-active {
            background: var(--snow-ice);
            border-color: var(--ice-blue);
        }

        .faq-item__header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 16px 20px;
            cursor: pointer;
            gap: 16px;
            user-select: none;
        }

        .faq-item__question {
            font-family: var(--font-title);
            font-size: 16px;
            font-weight: 700;
            color: var(--text-primary);
            line-height: 1.5;
        }

        .faq-item__arrow {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-orange);
            font-size: 14px;
            transition: transform .3s ease;
        }

        .faq-item.is-active .faq-item__arrow {
            transform: rotate(180deg);
        }

        .faq-item__answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height .4s ease, padding .4s ease;
            padding: 0 20px;
        }

        .faq-item.is-active .faq-item__answer {
            max-height: 400px;
            padding: 0 20px 18px;
        }

        .faq-item__answer p {
            font-size: 15px;
            line-height: 1.75;
            color: var(--text-secondary);
        }

        /* CTA Form */
        .cta-section {
            background-color: var(--polar-dark);
            background-image: linear-gradient(140deg, rgba(16, 33, 38, .97) 0%, rgba(16, 33, 38, .88) 60%, rgba(255, 90, 38, .12) 100%);
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: -120px;
            right: -120px;
            width: 400px;
            height: 400px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(255, 90, 38, .18) 0%, transparent 70%);
            z-index: 2;
            pointer-events: none;
        }

        .cta-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
            position: relative;
            z-index: 2;
        }

        .cta-form {
            background: rgba(255, 255, 255, .06);
            border: 1px solid rgba(255, 255, 255, .15);
            border-radius: var(--card-radius);
            padding: 28px;
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
        }

        .cta-form .form-group {
            margin-bottom: 16px;
        }

        .cta-form label {
            display: block;
            font-size: 13px;
            font-weight: 600;
            color: var(--snow-ice);
            margin-bottom: 6px;
            letter-spacing: .02em;
        }

        .cta-form input,
        .cta-form textarea,
        .cta-form select {
            width: 100%;
            padding: 11px 14px;
            border: 1px solid var(--ice-blue);
            border-radius: var(--btn-radius);
            background: rgba(255, 255, 255, .08);
            color: #fff;
            font-size: 15px;
            transition: border-color .25s ease, box-shadow .25s ease, background-color .25s ease;
        }

        .cta-form input::placeholder,
        .cta-form textarea::placeholder {
            color: rgba(255, 255, 255, .45);
        }

        .cta-form input:focus,
        .cta-form textarea:focus,
        .cta-form select:focus {
            border-color: var(--accent-orange);
            box-shadow: 0 0 0 3px rgba(255, 90, 38, .15);
            background: rgba(255, 255, 255, .12);
            outline: none;
        }

        .cta-form select option {
            background: var(--polar-dark);
            color: #fff;
        }

        .cta-form textarea {
            resize: vertical;
            min-height: 100px;
        }

        /* Hot events */
        .hot-events-grid {
            display: grid;
            grid-template-columns: 1.2fr 1fr 1fr;
            gap: 20px;
        }

        .hot-event-card {
            background: #fff;
            border: 1px solid var(--line-border);
            border-radius: var(--card-radius);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: transform .35s ease, box-shadow .35s ease, border-color .35s ease;
            cursor: pointer;
            position: relative;
        }

        .hot-event-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-card-hover);
            border-color: var(--ice-blue);
        }

        .hot-event-card--large {
            grid-row: span 2;
            display: flex;
            flex-direction: column;
        }

        .hot-event-card__image {
            aspect-ratio: 16/9;
            overflow: hidden;
        }

        .hot-event-card--large .hot-event-card__image {
            aspect-ratio: auto;
            flex: 1;
        }

        .hot-event-card__image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .4s ease;
        }

        .hot-event-card:hover .hot-event-card__image img {
            transform: scale(1.05);
        }

        .hot-event-card__body {
            padding: 16px 20px;
        }

        .hot-event-card__hot {
            display: inline-flex;
            align-items: center;
            gap: 5px;
            font-size: 12px;
            font-weight: 700;
            color: #fff;
            background: var(--accent-orange);
            padding: 3px 10px;
            border-radius: var(--badge-radius);
            letter-spacing: .04em;
            margin-bottom: 10px;
        }

        .hot-event-card__title {
            font-family: var(--font-title);
            font-size: 16px;
            font-weight: 700;
            color: var(--text-primary);
            line-height: 1.4;
            margin-bottom: 8px;
        }

        .hot-event-card__desc {
            font-size: 14px;
            line-height: 1.65;
            color: var(--text-secondary);
            margin-bottom: 10px;
        }

        .hot-event-card__cta {
            display: inline-flex;
            align-items: center;
            gap: 5px;
            font-size: 13.5px;
            font-weight: 600;
            color: var(--accent-orange);
        }

        /* Footer */
        .site-footer {
            background: #102126;
            color: #F5F9FA;
            padding: 48px 0 28px;
            border-top: 1px solid rgba(255, 255, 255, .1);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 32px;
            margin-bottom: 32px;
        }

        .footer-brand__name {
            font-family: var(--font-title);
            font-size: 20px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 12px;
            letter-spacing: .02em;
        }

        .footer-brand__desc {
            font-size: 14px;
            line-height: 1.7;
            color: rgba(255, 255, 255, .6);
            max-width: 320px;
        }

        .footer-col h4 {
            font-family: var(--font-title);
            font-size: 15px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 14px;
            letter-spacing: .03em;
        }

        .footer-col a {
            display: block;
            font-size: 14px;
            line-height: 2.2;
            color: rgba(255, 255, 255, .65);
            transition: color .2s ease;
        }

        .footer-col a:hover {
            color: var(--ice-blue);
        }

        .footer-bottom {
            padding-top: 20px;
            border-top: 1px solid rgba(255, 255, 255, .12);
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 10px;
            text-align: center;
        }

        .footer-bottom__legal {
            font-size: 13px;
            color: rgba(255, 255, 255, .55);
            line-height: 1.8;
        }

        .footer-bottom__legal a {
            color: rgba(255, 255, 255, .7);
            text-decoration: underline;
        }

        .footer-bottom__legal a:hover {
            color: var(--ice-blue);
        }

        .footer-bottom__icp {
            font-size: 12.5px;
            color: rgba(255, 255, 255, .45);
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            justify-content: center;
        }

        /* Breadcrumb */
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13.5px;
            color: var(--text-muted);
            margin-bottom: 24px;
            flex-wrap: wrap;
        }

        .breadcrumb a {
            color: var(--text-secondary);
        }

        .breadcrumb a:hover {
            color: var(--accent-orange);
        }

        .breadcrumb .separator {
            color: var(--text-muted);
            font-size: 11px;
        }

        .breadcrumb .current {
            color: var(--accent-orange);
            font-weight: 600;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .container {
                padding-left: 20px;
                padding-right: 20px;
            }

            .section {
                padding: 56px 0;
            }

            .nav-links a {
                padding: 6px 8px;
                font-size: 13.5px;
            }

            .nav-logo__text {
                font-size: 17px;
            }

            .brand-intro {
                grid-template-columns: 1fr;
                gap: 28px;
            }

            .services-grid {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }

            .hot-events-grid {
                grid-template-columns: 1fr 1fr;
            }

            .hot-event-card--large {
                grid-column: span 2;
                grid-row: auto;
            }

            .cta-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }

            .updates-grid {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }

            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
        }

        @media (max-width: 768px) {
            .nav-links {
                display: none;
            }

            .nav-actions .btn--nav-cta {
                display: none;
            }

            .hamburger {
                display: flex;
            }

            .hero__title {
                font-size: 28px;
            }

            .hero__subtitle {
                font-size: 16px;
            }

            .hero__data-row {
                gap: 16px;
            }

            .stats-band {
                grid-template-columns: 1fr 1fr;
                gap: 8px;
            }

            .stats-band .stat-item:not(:last-child)::after {
                display: none;
            }

            .services-grid {
                grid-template-columns: 1fr;
            }

            .services-grid .service-card--wide {
                grid-column: span 1;
                grid-row: auto;
            }

            .case-row {
                grid-template-columns: 1fr;
                gap: 20px;
                margin-bottom: 32px;
            }

            .plan-item {
                grid-template-columns: 56px 1fr;
                gap: 16px;
                padding: 18px 16px;
            }

            .news-first {
                grid-template-columns: 1fr;
            }

            .news-list .news-item {
                grid-template-columns: 1fr;
                gap: 6px;
                padding: 14px 16px;
            }

            .news-item__date {
                margin-bottom: 4px;
            }

            .updates-grid {
                grid-template-columns: 1fr;
            }

            .hot-events-grid {
                grid-template-columns: 1fr;
            }

            .hot-event-card--large {
                grid-column: span 1;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }

            .section__heading {
                font-size: 22px;
            }

            .section {
                padding: 44px 0;
            }

            .container {
                padding-left: 16px;
                padding-right: 16px;
            }

            .cta-form {
                padding: 20px;
            }

            .mobile-menu {
                top: 56px;
            }
        }

        @media (max-width: 520px) {
            .hero__actions {
                flex-direction: column;
                width: 100%;
            }

            .hero__actions .btn {
                width: 100%;
                justify-content: center;
            }

            .hero__data-row {
                flex-direction: column;
                align-items: flex-start;
                gap: 10px;
            }

            .hero__badge {
                font-size: 12px;
                padding: 4px 10px;
            }

            .stat-item__number {
                font-size: 26px;
            }

            .stat-item__label {
                font-size: 12px;
            }

            .plan-item__num {
                font-size: 28px;
            }

            .plan-item__title {
                font-size: 16px;
            }

            .faq-item__question {
                font-size: 14.5px;
            }
        }

/* roulang page: category3 */
:root {
            --polar-dark: #102126;
            --ice-blue: #9FD7E5;
            --accent-orange: #FF5A26;
            --accent-orange-hover: #E64A18;
            --snow-ice: #D8EFF3;
            --ice-mist: #F5F9FA;
            --line-border: #E5EDEF;
            --text-primary: #1A2A2F;
            --text-secondary: #4B5E63;
            --text-muted: #7A8C90;
            --card-radius: 10px;
            --btn-radius: 6px;
            --badge-radius: 4px;
            --shadow-card: 0 2px 8px rgba(16, 33, 38, .06);
            --shadow-card-hover: 0 8px 24px rgba(16, 33, 38, .12);
            --font-title: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
            --font-body: "Noto Sans SC", "Source Han Sans SC", "Microsoft YaHei", sans-serif;
            --max-width: 1200px;
            --section-padding: 80px 0;
            --section-padding-mobile: 48px 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: var(--font-body);
            font-size: 16px;
            line-height: 1.75;
            color: var(--text-primary);
            background-color: var(--ice-mist);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border: 0;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: color .2s ease, background-color .2s ease, border-color .2s ease;
        }

        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        textarea:focus-visible,
        select:focus-visible {
            outline: 2px solid var(--ice-blue);
            outline-offset: 2px;
        }

        button,
        input,
        textarea,
        select {
            font-family: var(--font-body);
            font-size: 16px;
        }

        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        .section {
            padding: var(--section-padding);
        }

        .section--dark {
            background-color: var(--polar-dark);
            color: #F5F9FA;
        }

        .section--snow {
            background-color: var(--snow-ice);
        }

        .section--light {
            background-color: #fff;
        }

        .section__heading {
            font-family: var(--font-title);
            font-size: clamp(26px, 4vw, 34px);
            font-weight: 700;
            line-height: 1.35;
            letter-spacing: .015em;
            color: var(--text-primary);
            margin-bottom: 16px;
        }

        .section__heading--white {
            color: #fff;
        }

        .section__subheading {
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-secondary);
            max-width: 720px;
            margin-bottom: 40px;
        }

        .section__subheading--white {
            color: var(--snow-ice);
        }

        .section__label {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            color: var(--accent-orange);
            letter-spacing: .06em;
            text-transform: uppercase;
            margin-bottom: 12px;
        }

        .section__label--ice {
            color: var(--ice-blue);
        }

        /* Navigation */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 999;
            transition: background-color .3s ease, box-shadow .3s ease, backdrop-filter .3s ease;
            background: rgba(16, 33, 38, .35);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(255, 255, 255, .2);
            box-shadow: 0 1px 0 rgba(255, 255, 255, .15) inset;
        }

        .site-header.is-scrolled {
            background: #102126;
            box-shadow: 0 4px 16px rgba(0, 0, 0, .2);
            border-bottom: 1px solid var(--ice-blue);
        }

        .site-header .nav-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            min-height: 64px;
            gap: 16px;
        }

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }

        .nav-logo__icon {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--ice-blue), var(--snow-ice));
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
        }

        .nav-logo__icon i {
            color: var(--polar-dark);
            font-size: 18px;
        }

        .nav-logo__text {
            font-family: var(--font-title);
            font-size: 19px;
            font-weight: 700;
            color: #F5F9FA;
            letter-spacing: .02em;
            white-space: nowrap;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 4px;
        }

        .nav-links a {
            display: inline-block;
            padding: 8px 12px;
            font-size: 14.5px;
            font-weight: 500;
            color: #F5F9FA;
            position: relative;
            white-space: nowrap;
            letter-spacing: .01em;
        }

        .nav-links a:hover {
            color: var(--ice-blue);
        }

        .nav-links a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 12px;
            right: 12px;
            height: 2px;
            background-color: var(--accent-orange);
            border-radius: 1px;
        }

        .nav-links a.active {
            color: #fff;
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }

        .nav-search-icon {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            border: 1px solid rgba(255, 255, 255, .35);
            background: transparent;
            color: #F5F9FA;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: all .2s ease;
            font-size: 14px;
        }

        .nav-search-icon:hover {
            background: rgba(255, 255, 255, .15);
            border-color: var(--ice-blue);
            color: var(--ice-blue);
        }

        .nav-cta {
            display: inline-block;
            padding: 8px 16px;
            background: var(--accent-orange);
            color: #fff;
            border-radius: var(--btn-radius);
            font-size: 14px;
            font-weight: 600;
            letter-spacing: .02em;
            white-space: nowrap;
            transition: all .2s ease;
        }

        .nav-cta:hover {
            background: var(--accent-orange-hover);
            transform: translateY(-1px);
            box-shadow: 0 4px 12px rgba(255, 90, 38, .35);
            color: #fff;
        }

        .nav-toggle {
            display: none;
            width: 40px;
            height: 40px;
            border: 1px solid rgba(255, 255, 255, .3);
            border-radius: 6px;
            background: transparent;
            color: #fff;
            font-size: 18px;
            cursor: pointer;
            align-items: center;
            justify-content: center;
            transition: all .2s ease;
        }

        .nav-toggle:hover {
            background: rgba(255, 255, 255, .1);
        }

        /* Breadcrumb */
        .breadcrumb-bar {
            padding: 80px 0 16px;
            background: var(--ice-mist);
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
            font-size: 13.5px;
            color: var(--text-muted);
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .breadcrumb li {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .breadcrumb li:not(:last-child)::after {
            content: '/';
            color: var(--text-muted);
            font-size: 12px;
        }

        .breadcrumb a {
            color: var(--text-secondary);
            transition: color .2s ease;
        }

        .breadcrumb a:hover {
            color: var(--accent-orange);
        }

        .breadcrumb .current {
            color: var(--text-primary);
            font-weight: 600;
        }

        /* Hero */
        .hero-training {
            padding: 40px 0 70px;
            background: var(--ice-mist);
            position: relative;
            overflow: hidden;
        }

        .hero-training::before {
            content: '';
            position: absolute;
            top: 0;
            right: 0;
            width: 45%;
            height: 100%;
            background: linear-gradient(135deg, rgba(16, 33, 38, .04), rgba(159, 215, 229, .08));
            border-radius: 0 0 0 40px;
            pointer-events: none;
        }

        .hero-training__grid {
            display: flex;
            align-items: center;
            gap: 48px;
            position: relative;
            z-index: 1;
        }

        .hero-training__content {
            flex: 0 0 48%;
            max-width: 48%;
        }

        .hero-training__image {
            flex: 0 0 48%;
            max-width: 48%;
            border-radius: var(--card-radius);
            overflow: hidden;
            box-shadow: var(--shadow-card-hover);
            border: 1px solid var(--line-border);
            position: relative;
        }

        .hero-training__image::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: linear-gradient(90deg, var(--accent-orange), var(--ice-blue));
        }

        .hero-training__image img {
            width: 100%;
            height: 400px;
            object-fit: cover;
        }

        .hero-training__title {
            font-family: var(--font-title);
            font-size: clamp(30px, 4.5vw, 42px);
            font-weight: 700;
            line-height: 1.3;
            letter-spacing: .01em;
            color: var(--polar-dark);
            margin-bottom: 18px;
        }

        .hero-training__subtitle {
            font-size: 17px;
            line-height: 1.8;
            color: var(--text-secondary);
            max-width: 560px;
            margin-bottom: 28px;
        }

        .hero-training__meta {
            display: flex;
            flex-wrap: wrap;
            gap: 16px 24px;
            margin-bottom: 28px;
        }

        .hero-training__meta-item {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--text-muted);
        }

        .hero-training__meta-item i {
            color: var(--accent-orange);
            font-size: 14px;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 24px;
            border-radius: var(--btn-radius);
            font-size: 15px;
            font-weight: 600;
            letter-spacing: .02em;
            cursor: pointer;
            border: 1.5px solid transparent;
            transition: all .2s ease;
            text-align: center;
            justify-content: center;
        }

        .btn--primary {
            background: var(--accent-orange);
            color: #fff;
            border-color: var(--accent-orange);
        }

        .btn--primary:hover {
            background: var(--accent-orange-hover);
            border-color: var(--accent-orange-hover);
            transform: translateY(-2px);
            box-shadow: 0 6px 16px rgba(255, 90, 38, .3);
            color: #fff;
        }

        .btn--outline {
            background: transparent;
            color: var(--polar-dark);
            border-color: var(--polar-dark);
        }

        .btn--outline:hover {
            background: var(--polar-dark);
            color: #fff;
            transform: translateY(-2px);
        }

        /* Training Overview */
        .training-overview {
            padding: 56px 0;
            background: #fff;
            border-top: 1px solid var(--line-border);
            border-bottom: 1px solid var(--line-border);
        }

        .training-overview__grid {
            display: flex;
            gap: 40px;
            align-items: flex-start;
        }

        .training-overview__text {
            flex: 1;
            max-width: 720px;
        }

        .training-overview__text p {
            color: var(--text-secondary);
            margin-bottom: 16px;
            line-height: 1.85;
        }

        .training-overview__stats {
            flex: 0 0 280px;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .stat-chip {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 16px 18px;
            background: var(--ice-mist);
            border: 1px solid var(--line-border);
            border-radius: var(--card-radius);
            transition: all .2s ease;
        }

        .stat-chip:hover {
            border-color: var(--ice-blue);
            box-shadow: var(--shadow-card);
        }

        .stat-chip__number {
            font-family: var(--font-title);
            font-size: 28px;
            font-weight: 700;
            color: var(--accent-orange);
            line-height: 1;
            min-width: 64px;
        }

        .stat-chip__label {
            font-size: 13.5px;
            color: var(--text-secondary);
            line-height: 1.4;
        }

        /* Alternating content blocks */
        .alternate-blocks {
            padding: 70px 0;
            background: var(--ice-mist);
        }

        .alternate-block {
            display: flex;
            align-items: center;
            gap: 48px;
            margin-bottom: 64px;
        }

        .alternate-block:last-child {
            margin-bottom: 0;
        }

        .alternate-block--reverse {
            flex-direction: row-reverse;
        }

        .alternate-block__image {
            flex: 0 0 44%;
            max-width: 44%;
            border-radius: var(--card-radius);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            border: 1px solid var(--line-border);
            transition: all .3s ease;
        }

        .alternate-block__image:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-4px);
            border-color: var(--ice-blue);
        }

        .alternate-block__image img {
            width: 100%;
            height: 320px;
            object-fit: cover;
        }

        .alternate-block__content {
            flex: 1;
        }

        .alternate-block__badge {
            display: inline-block;
            padding: 4px 12px;
            background: var(--snow-ice);
            color: var(--polar-dark);
            border-radius: var(--badge-radius);
            font-size: 12.5px;
            font-weight: 600;
            letter-spacing: .04em;
            margin-bottom: 12px;
        }

        .alternate-block__title {
            font-family: var(--font-title);
            font-size: clamp(20px, 2.8vw, 26px);
            font-weight: 700;
            color: var(--polar-dark);
            margin-bottom: 14px;
            line-height: 1.4;
        }

        .alternate-block__summary {
            font-size: 15px;
            line-height: 1.85;
            color: var(--text-secondary);
            margin-bottom: 16px;
            max-width: 560px;
        }

        .alternate-block__detail {
            font-size: 14px;
            line-height: 1.8;
            color: var(--text-muted);
            margin-bottom: 18px;
        }

        .alternate-block__link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14.5px;
            font-weight: 600;
            color: var(--accent-orange);
            transition: all .2s ease;
        }

        .alternate-block__link:hover {
            color: var(--accent-orange-hover);
            gap: 10px;
        }

        /* Training Process */
        .process-section {
            padding: 70px 0;
            background: var(--snow-ice);
        }

        .process-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            margin-top: 40px;
        }

        .process-step {
            background: #fff;
            border: 1px solid var(--line-border);
            border-radius: var(--card-radius);
            padding: 24px 20px;
            box-shadow: var(--shadow-card);
            transition: all .3s ease;
            position: relative;
        }

        .process-step:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-card-hover);
            border-color: var(--ice-blue);
        }

        .process-step__number {
            font-family: var(--font-title);
            font-size: 40px;
            font-weight: 700;
            color: var(--ice-blue);
            line-height: 1;
            margin-bottom: 14px;
            letter-spacing: .02em;
        }

        .process-step__title {
            font-family: var(--font-title);
            font-size: 17px;
            font-weight: 700;
            color: var(--polar-dark);
            margin-bottom: 8px;
        }

        .process-step__desc {
            font-size: 14px;
            line-height: 1.7;
            color: var(--text-secondary);
        }

        /* FAQ */
        .faq-section {
            padding: 70px 0;
            background: #fff;
        }

        .faq-list {
            max-width: 800px;
            margin: 0 auto;
        }

        .faq-item {
            border: 1px solid var(--line-border);
            border-radius: var(--card-radius);
            margin-bottom: 12px;
            overflow: hidden;
            transition: all .2s ease;
            background: #fff;
        }

        .faq-item.active {
            border-color: var(--ice-blue);
            box-shadow: var(--shadow-card);
        }

        .faq-item__question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 18px 20px;
            cursor: pointer;
            font-family: var(--font-title);
            font-size: 16px;
            font-weight: 600;
            color: var(--polar-dark);
            background: #fff;
            transition: background-color .2s ease;
            user-select: none;
            border: none;
            width: 100%;
            text-align: left;
        }

        .faq-item.active .faq-item__question {
            background: var(--snow-ice);
        }

        .faq-item__question:hover {
            background: var(--ice-mist);
        }

        .faq-item.active .faq-item__question:hover {
            background: var(--snow-ice);
        }

        .faq-item__icon {
            color: var(--accent-orange);
            font-size: 14px;
            flex-shrink: 0;
            transition: transform .25s ease;
        }

        .faq-item.active .faq-item__icon {
            transform: rotate(180deg);
        }

        .faq-item__answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height .3s ease, padding .3s ease;
            padding: 0 20px;
            font-size: 14.5px;
            line-height: 1.75;
            color: var(--text-secondary);
        }

        .faq-item.active .faq-item__answer {
            max-height: 240px;
            padding: 0 20px 18px;
        }

        /* Related Recommendations */
        .related-section {
            padding: 70px 0;
            background: var(--ice-mist);
        }

        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
            margin-top: 32px;
        }

        .related-card {
            background: #fff;
            border: 1px solid var(--line-border);
            border-radius: var(--card-radius);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: all .3s ease;
            display: flex;
            flex-direction: column;
        }

        .related-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-card-hover);
            border-color: var(--ice-blue);
        }

        .related-card__image {
            width: 100%;
            height: 180px;
            object-fit: cover;
            border-bottom: 3px solid var(--ice-blue);
        }

        .related-card__body {
            padding: 18px 20px;
            display: flex;
            flex-direction: column;
            gap: 8px;
            flex: 1;
        }

        .related-card__title {
            font-family: var(--font-title);
            font-size: 16.5px;
            font-weight: 700;
            color: var(--polar-dark);
            line-height: 1.4;
        }

        .related-card__title a:hover {
            color: var(--accent-orange);
        }

        .related-card__desc {
            font-size: 13.5px;
            line-height: 1.7;
            color: var(--text-muted);
            flex: 1;
        }

        .related-card__link {
            font-size: 13.5px;
            font-weight: 600;
            color: var(--accent-orange);
            align-self: flex-start;
            transition: all .2s ease;
        }

        .related-card__link:hover {
            color: var(--accent-orange-hover);
        }

        /* CTA */
        .cta-section {
            padding: 80px 0;
            background: var(--polar-dark);
            color: #F5F9FA;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: -40%;
            left: -10%;
            width: 60%;
            height: 180%;
            background: radial-gradient(ellipse, rgba(159, 215, 229, .08), transparent 70%);
            pointer-events: none;
        }

        .cta-section::after {
            content: '';
            position: absolute;
            bottom: -30%;
            right: -5%;
            width: 50%;
            height: 160%;
            background: radial-gradient(ellipse, rgba(255, 90, 38, .07), transparent 70%);
            pointer-events: none;
        }

        .cta-section .container {
            position: relative;
            z-index: 1;
        }

        .cta-grid {
            display: flex;
            gap: 48px;
            align-items: flex-start;
        }

        .cta-content {
            flex: 1;
        }

        .cta-content__title {
            font-family: var(--font-title);
            font-size: clamp(24px, 3vw, 32px);
            font-weight: 700;
            color: #fff;
            line-height: 1.35;
            margin-bottom: 16px;
        }

        .cta-content__desc {
            font-size: 15.5px;
            line-height: 1.8;
            color: var(--snow-ice);
            max-width: 520px;
            margin-bottom: 24px;
        }

        .cta-contact-list {
            list-style: none;
            margin: 0 0 24px;
            padding: 0;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .cta-contact-list li {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 14.5px;
            color: var(--snow-ice);
        }

        .cta-contact-list i {
            color: var(--ice-blue);
            font-size: 15px;
            width: 20px;
        }

        .cta-form {
            flex: 0 0 420px;
            max-width: 420px;
            background: rgba(255, 255, 255, .06);
            border: 1px solid rgba(159, 215, 229, .25);
            border-radius: var(--card-radius);
            padding: 28px;
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
        }

        .cta-form__title {
            font-family: var(--font-title);
            font-size: 18px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 18px;
        }

        .form-group {
            margin-bottom: 16px;
        }

        .form-group label {
            display: block;
            font-size: 13.5px;
            font-weight: 500;
            color: var(--snow-ice);
            margin-bottom: 6px;
            letter-spacing: .02em;
        }

        .form-group input,
        .form-group select,
        .form-group textarea {
            width: 100%;
            padding: 11px 14px;
            background: rgba(255, 255, 255, .07);
            border: 1px solid rgba(159, 215, 229, .3);
            border-radius: var(--btn-radius);
            color: #fff;
            font-size: 14.5px;
            transition: all .2s ease;
        }

        .form-group input::placeholder,
        .form-group textarea::placeholder {
            color: rgba(245, 249, 250, .45);
        }

        .form-group input:focus,
        .form-group select:focus,
        .form-group textarea:focus {
            outline: none;
            border-color: var(--accent-orange);
            box-shadow: 0 0 0 3px rgba(255, 90, 38, .15);
            background: rgba(255, 255, 255, .1);
        }

        .form-group select option {
            color: var(--polar-dark);
            background: #fff;
        }

        .form-group textarea {
            resize: vertical;
            min-height: 100px;
        }

        .btn--submit {
            width: 100%;
            padding: 13px 20px;
            background: var(--accent-orange);
            color: #fff;
            border: none;
            border-radius: var(--btn-radius);
            font-size: 15px;
            font-weight: 600;
            letter-spacing: .04em;
            cursor: pointer;
            transition: all .2s ease;
        }

        .btn--submit:hover {
            background: var(--accent-orange-hover);
            transform: translateY(-2px);
            box-shadow: 0 6px 18px rgba(255, 90, 38, .35);
        }

        /* Footer */
        .site-footer {
            background: #102126;
            color: #F5F9FA;
            padding: 56px 0 24px;
            border-top: 1px solid rgba(159, 215, 229, .15);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 36px;
        }

        .footer-brand__name {
            font-family: var(--font-title);
            font-size: 20px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 10px;
            letter-spacing: .02em;
        }

        .footer-brand__desc {
            font-size: 14px;
            line-height: 1.75;
            color: var(--text-muted);
            max-width: 320px;
        }

        .footer-col h4 {
            font-family: var(--font-title);
            font-size: 15px;
            font-weight: 600;
            color: var(--ice-blue);
            margin-bottom: 14px;
            letter-spacing: .04em;
        }

        .footer-col a {
            display: block;
            font-size: 14px;
            color: #F5F9FA;
            margin-bottom: 8px;
            transition: color .2s ease;
        }

        .footer-col a:hover {
            color: var(--ice-blue);
        }

        .footer-bottom {
            border-top: 1px solid rgba(159, 215, 229, .12);
            padding-top: 20px;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .footer-bottom__legal {
            font-size: 13.5px;
            color: var(--text-muted);
            display: flex;
            flex-wrap: wrap;
            gap: 6px 16px;
            align-items: center;
        }

        .footer-bottom__legal a {
            color: var(--ice-blue);
            font-size: 13.5px;
        }

        .footer-bottom__legal a:hover {
            color: var(--accent-orange);
        }

        .footer-bottom__icp {
            display: flex;
            flex-wrap: wrap;
            gap: 12px 24px;
            font-size: 13px;
            color: var(--text-muted);
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .hero-training__grid {
                gap: 32px;
            }

            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }

            .cta-grid {
                flex-direction: column;
                gap: 32px;
            }

            .cta-form {
                flex: 1;
                max-width: 100%;
                width: 100%;
            }
        }

        @media (max-width: 767px) {
            .nav-links {
                display: none;
                position: absolute;
                top: 64px;
                left: 0;
                right: 0;
                background: #102126;
                flex-direction: column;
                align-items: stretch;
                padding: 16px 24px;
                gap: 4px;
                border-bottom: 1px solid rgba(159, 215, 229, .2);
                box-shadow: 0 8px 24px rgba(0, 0, 0, .3);
            }

            .nav-links.open {
                display: flex;
            }

            .nav-links a {
                padding: 12px 16px;
                font-size: 16px;
                border-bottom: 1px solid rgba(159, 215, 229, .08);
            }

            .nav-links a:last-child {
                border-bottom: none;
            }

            .nav-links a.active::after {
                display: none;
            }

            .nav-links a.active {
                color: var(--accent-orange);
            }

            .nav-toggle {
                display: flex;
            }

            .nav-cta {
                display: none;
            }

            .section {
                padding: var(--section-padding-mobile);
            }

            .hero-training {
                padding: 110px 0 48px;
            }

            .hero-training__grid {
                flex-direction: column;
                gap: 28px;
            }

            .hero-training__content,
            .hero-training__image {
                flex: 1;
                max-width: 100%;
                width: 100%;
            }

            .hero-training__image img {
                height: 240px;
            }

            .hero-training__title {
                font-size: 26px;
            }

            .training-overview__grid {
                flex-direction: column;
                gap: 24px;
            }

            .training-overview__stats {
                flex: 1;
                width: 100%;
            }

            .alternate-block,
            .alternate-block--reverse {
                flex-direction: column;
                gap: 20px;
                margin-bottom: 40px;
            }

            .alternate-block__image {
                flex: 1;
                max-width: 100%;
                width: 100%;
            }

            .alternate-block__image img {
                height: 200px;
            }

            .process-grid {
                grid-template-columns: 1fr;
                gap: 14px;
            }

            .related-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }

            .footer-bottom {
                flex-direction: column;
                gap: 8px;
            }

            .footer-bottom__icp {
                flex-direction: column;
                gap: 6px;
            }

            .breadcrumb-bar {
                padding: 76px 0 12px;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }

            .hero-training__title {
                font-size: 23px;
            }

            .hero-training__meta {
                flex-direction: column;
                gap: 8px;
            }

            .process-step {
                padding: 18px 16px;
            }

            .process-step__number {
                font-size: 32px;
            }

            .cta-form {
                padding: 20px 16px;
            }

            .footer-bottom__legal {
                flex-direction: column;
                gap: 6px;
                align-items: flex-start;
            }
        }

/* roulang page: category1 */
:root {
            --polar-dark: #102126;
            --ice-blue: #9FD7E5;
            --accent-orange: #FF5A26;
            --accent-orange-hover: #E64A18;
            --snow-ice: #D8EFF3;
            --ice-mist: #F5F9FA;
            --line-border: #E5EDEF;
            --text-primary: #1A2A2F;
            --text-secondary: #4B5E63;
            --text-muted: #7A8C90;
            --card-radius: 10px;
            --btn-radius: 6px;
            --badge-radius: 4px;
            --shadow-card: 0 2px 8px rgba(16, 33, 38, .06);
            --shadow-card-hover: 0 8px 24px rgba(16, 33, 38, .12);
            --font-title: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
            --font-body: "Noto Sans SC", "Source Han Sans SC", "Microsoft YaHei", sans-serif;
            --max-width: 1200px;
            --section-padding: 80px 0;
            --section-padding-mobile: 48px 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        body {
            font-family: var(--font-body);
            font-size: 16px;
            line-height: 1.75;
            color: var(--text-primary);
            background-color: var(--ice-mist);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border: 0;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: color .2s ease, background-color .2s ease, border-color .2s ease;
        }
        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        textarea:focus-visible,
        select:focus-visible {
            outline: 2px solid var(--ice-blue);
            outline-offset: 2px;
            border-radius: 2px;
        }
        button,
        input,
        textarea,
        select {
            font-family: var(--font-body);
            font-size: 16px;
        }
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }
        .section {
            padding: var(--section-padding);
        }
        .section--dark {
            background-color: var(--polar-dark);
            color: #F5F9FA;
        }
        .section--snow {
            background-color: var(--snow-ice);
        }
        .section--light {
            background-color: #fff;
        }
        .section__heading {
            font-family: var(--font-title);
            font-size: clamp(26px, 4vw, 34px);
            font-weight: 700;
            line-height: 1.35;
            letter-spacing: .015em;
            color: var(--text-primary);
            margin-bottom: 16px;
        }
        .section__heading--white {
            color: #fff;
        }
        .section__subheading {
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-secondary);
            max-width: 720px;
            margin-bottom: 40px;
        }
        .section__subheading--white {
            color: var(--snow-ice);
        }
        .section__label {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            color: var(--accent-orange);
            letter-spacing: .06em;
            text-transform: uppercase;
            margin-bottom: 12px;
        }
        .section__label--ice {
            color: var(--ice-blue);
        }

        /* Navigation */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 999;
            transition: background-color .3s ease, box-shadow .3s ease, backdrop-filter .3s ease, -webkit-backdrop-filter .3s ease;
            background: rgba(16, 33, 38, .35);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(255, 255, 255, .2);
            box-shadow: 0 1px 0 rgba(255, 255, 255, .15) inset;
        }
        .site-header.is-scrolled {
            background: #102126;
            box-shadow: 0 4px 16px rgba(0, 0, 0, .2);
            border-bottom: 1px solid var(--ice-blue);
        }
        .site-header .nav-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            min-height: 64px;
            gap: 16px;
        }
        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .nav-logo__icon {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--ice-blue), var(--snow-ice));
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
        }
        .nav-logo__icon i {
            color: var(--polar-dark);
            font-size: 18px;
        }
        .nav-logo__text {
            font-family: var(--font-title);
            font-size: 19px;
            font-weight: 700;
            color: #F5F9FA;
            letter-spacing: .02em;
            white-space: nowrap;
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 4px;
        }
        .nav-links a {
            display: inline-block;
            padding: 8px 12px;
            font-size: 14.5px;
            font-weight: 500;
            color: #F5F9FA;
            position: relative;
            white-space: nowrap;
            letter-spacing: .01em;
        }
        .nav-links a:hover {
            color: var(--ice-blue);
        }
        .nav-links a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 12px;
            right: 12px;
            height: 2px;
            background-color: var(--accent-orange);
            border-radius: 1px;
        }
        .nav-links a.active {
            color: #fff;
        }
        .nav-actions {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .nav-search-icon {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            border: 1px solid rgba(255, 255, 255, .4);
            background: transparent;
            color: #F5F9FA;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: border-color .2s ease, background-color .2s ease;
        }
        .nav-search-icon:hover {
            border-color: var(--ice-blue);
            background-color: rgba(159, 215, 229, .12);
        }
        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 16px;
            border-radius: var(--btn-radius);
            background-color: var(--accent-orange);
            color: #fff;
            font-size: 14px;
            font-weight: 600;
            white-space: nowrap;
            transition: background-color .2s ease, transform .2s ease;
        }
        .nav-cta:hover {
            background-color: var(--accent-orange-hover);
            color: #fff;
            transform: translateY(-1px);
        }
        .nav-hamburger {
            display: none;
            width: 36px;
            height: 36px;
            border: 1px solid rgba(255, 255, 255, .4);
            background: transparent;
            color: #F5F9FA;
            border-radius: 6px;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 4px;
            cursor: pointer;
            flex-shrink: 0;
        }
        .nav-hamburger span {
            display: block;
            width: 18px;
            height: 2px;
            background-color: #F5F9FA;
            border-radius: 1px;
            transition: transform .25s ease, opacity .25s ease;
        }
        .nav-hamburger.is-open span:nth-child(1) {
            transform: translateY(6px) rotate(45deg);
        }
        .nav-hamburger.is-open span:nth-child(2) {
            opacity: 0;
        }
        .nav-hamburger.is-open span:nth-child(3) {
            transform: translateY(-6px) rotate(-45deg);
        }
        @media (max-width: 1024px) {
            .nav-links {
                display: none;
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                background: #102126;
                border-bottom: 1px solid var(--ice-blue);
                flex-direction: column;
                align-items: stretch;
                padding: 12px 24px;
                gap: 0;
                box-shadow: 0 16px 32px rgba(0, 0, 0, .25);
            }
            .nav-links.is-mobile-open {
                display: flex;
            }
            .nav-links a {
                padding: 12px 0;
                font-size: 16px;
                border-bottom: 1px solid rgba(255, 255, 255, .08);
            }
            .nav-links a:last-child {
                border-bottom: none;
            }
            .nav-links a.active::after {
                bottom: 8px;
                left: 0;
                right: auto;
                width: 28px;
                height: 2px;
            }
            .nav-hamburger {
                display: flex;
            }
            .nav-cta {
                display: none;
            }
        }
        @media (max-width: 640px) {
            .nav-logo__text {
                font-size: 17px;
            }
            .nav-logo__icon {
                width: 32px;
                height: 32px;
            }
            .nav-search-icon {
                width: 32px;
                height: 32px;
            }
        }

        /* Buttons */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 24px;
            border-radius: var(--btn-radius);
            font-size: 15px;
            font-weight: 600;
            line-height: 1.4;
            border: none;
            cursor: pointer;
            transition: background-color .2s ease, color .2s ease, border-color .2s ease, transform .2s ease, box-shadow .2s ease;
        }
        .btn--primary {
            background-color: var(--accent-orange);
            color: #fff;
        }
        .btn--primary:hover {
            background-color: var(--accent-orange-hover);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 18px rgba(255, 90, 38, .22);
        }
        .btn--secondary {
            background-color: transparent;
            color: var(--polar-dark);
            border: 1.5px solid var(--polar-dark);
        }
        .btn--secondary:hover {
            background-color: var(--polar-dark);
            color: #fff;
            transform: translateY(-2px);
        }
        .btn--secondary-white {
            background-color: transparent;
            color: #F5F9FA;
            border: 1.5px solid rgba(245, 249, 250, .7);
        }
        .btn--secondary-white:hover {
            background-color: #F5F9FA;
            color: var(--polar-dark);
            transform: translateY(-2px);
        }
        .btn--sm {
            padding: 8px 16px;
            font-size: 13.5px;
        }

        /* Hero */
        .hero-section {
            position: relative;
            min-height: 520px;
            background-image: linear-gradient(135deg, rgba(16, 33, 38, .85) 0%, rgba(16, 33, 38, .55) 60%, rgba(255, 90, 38, .25) 100%), url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            display: flex;
            align-items: flex-end;
            padding-top: 120px;
            padding-bottom: 56px;
            color: #fff;
        }
        .hero-section .container {
            width: 100%;
        }
        .breadcrumb {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 8px;
            font-size: 13.5px;
            color: var(--snow-ice);
            margin-bottom: 20px;
        }
        .breadcrumb a {
            color: var(--ice-blue);
            transition: color .2s ease;
        }
        .breadcrumb a:hover {
            color: #fff;
            text-decoration: underline;
        }
        .breadcrumb i {
            font-size: 10px;
            color: var(--ice-blue);
        }
        .hero-title {
            font-family: var(--font-title);
            font-size: clamp(30px, 5vw, 44px);
            font-weight: 700;
            line-height: 1.25;
            letter-spacing: .02em;
            color: #fff;
            margin-bottom: 16px;
        }
        .hero-desc {
            font-size: 18px;
            line-height: 1.65;
            color: var(--snow-ice);
            max-width: 680px;
            margin-bottom: 28px;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
        }

        /* Card grid */
        .cards-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .card {
            background: #fff;
            border-radius: var(--card-radius);
            border: 1px solid var(--line-border);
            box-shadow: var(--shadow-card);
            overflow: hidden;
            display: flex;
            flex-direction: column;
            transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
        }
        .card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-card-hover);
            border-color: var(--ice-blue);
        }
        .card__media {
            position: relative;
            aspect-ratio: 16 / 9;
            overflow: hidden;
            background-color: var(--snow-ice);
        }
        .card__media img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .4s ease;
        }
        .card:hover .card__media img {
            transform: scale(1.04);
        }
        .card__date {
            position: absolute;
            top: 12px;
            left: 12px;
            background: rgba(16, 33, 38, .78);
            color: #fff;
            font-size: 12px;
            padding: 4px 10px;
            border-radius: 20px;
            letter-spacing: .02em;
        }
        .card__body {
            padding: 20px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }
        .card__title {
            font-family: var(--font-title);
            font-size: 17px;
            font-weight: 700;
            line-height: 1.45;
            color: var(--text-primary);
            margin-bottom: 10px;
            transition: color .2s ease;
        }
        .card:hover .card__title {
            color: var(--accent-orange);
        }
        .card__excerpt {
            font-size: 14.5px;
            line-height: 1.65;
            color: var(--text-secondary);
            flex: 1;
            margin-bottom: 14px;
        }
        .card__link {
            font-size: 14px;
            font-weight: 600;
            color: var(--accent-orange);
            display: inline-flex;
            align-items: center;
            gap: 4px;
            transition: gap .2s ease;
        }
        .card__link:hover {
            gap: 8px;
        }

        /* Pagination */
        .pagination-wrap {
            display: flex;
            justify-content: center;
            align-items: center;
            gap: 8px;
            margin-top: 36px;
            flex-wrap: wrap;
        }
        .pagination-btn {
            width: 40px;
            height: 40px;
            border-radius: 6px;
            border: 1px solid var(--line-border);
            background: #fff;
            color: var(--text-secondary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            font-weight: 500;
            cursor: pointer;
            transition: background-color .2s ease, color .2s ease, border-color .2s ease;
        }
        .pagination-btn:hover {
            border-color: var(--ice-blue);
            color: var(--polar-dark);
            background-color: var(--snow-ice);
        }
        .pagination-btn.is-active {
            background-color: var(--polar-dark);
            color: #fff;
            border-color: var(--polar-dark);
        }
        .pagination-btn.is-disabled {
            opacity: .4;
            pointer-events: none;
        }

        /* Stats */
        .stats-band {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            background: var(--polar-dark);
            border-radius: var(--card-radius);
            padding: 32px 28px;
        }
        .stat-item {
            text-align: center;
            position: relative;
        }
        .stat-item:not(:last-child)::after {
            content: '';
            position: absolute;
            right: -12px;
            top: 50%;
            transform: translateY(-50%);
            width: 1px;
            height: 40px;
            background: rgba(255, 255, 255, .2);
        }
        .stat-number {
            font-family: var(--font-title);
            font-size: 32px;
            font-weight: 700;
            color: var(--accent-orange);
            line-height: 1.2;
        }
        .stat-label {
            font-size: 13px;
            color: var(--snow-ice);
            margin-top: 6px;
        }

        /* Deep text */
        .deep-content {
            font-size: 16px;
            line-height: 1.85;
            color: var(--text-secondary);
            max-width: 860px;
        }
        .deep-content p {
            margin-bottom: 1.25em;
        }
        .deep-content blockquote {
            border-left: 3px solid var(--accent-orange);
            background: rgba(255, 90, 38, .05);
            padding: 18px 20px;
            border-radius: 0 8px 8px 0;
            margin: 20px 0;
            color: var(--text-primary);
            font-style: normal;
        }

        /* Feature list */
        .feature-list {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
        }
        .feature-item {
            background: #fff;
            border: 1px solid var(--line-border);
            border-radius: var(--card-radius);
            padding: 24px;
            display: flex;
            gap: 16px;
            align-items: flex-start;
            box-shadow: var(--shadow-card);
            transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
        }
        .feature-item:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-card-hover);
            border-color: var(--ice-blue);
        }
        .feature-item__icon {
            width: 44px;
            height: 44px;
            border-radius: 10px;
            background: var(--snow-ice);
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            color: var(--polar-dark);
            font-size: 20px;
        }
        .feature-item__title {
            font-family: var(--font-title);
            font-size: 16px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 6px;
        }
        .feature-item__text {
            font-size: 14.5px;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        /* Related */
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }
        .related-card {
            background: #fff;
            border: 1px solid var(--line-border);
            border-radius: var(--card-radius);
            padding: 20px;
            box-shadow: var(--shadow-card);
            display: flex;
            flex-direction: column;
            gap: 10px;
            transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
        }
        .related-card:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-card-hover);
            border-color: var(--ice-blue);
        }
        .related-card__title {
            font-family: var(--font-title);
            font-size: 16px;
            font-weight: 700;
            color: var(--text-primary);
        }
        .related-card__text {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
        }
        .related-card__link {
            font-size: 14px;
            font-weight: 600;
            color: var(--accent-orange);
        }

        /* FAQ */
        .faq-list {
            max-width: 820px;
            margin: 0 auto;
        }
        .faq-item {
            background: #fff;
            border: 1px solid var(--line-border);
            border-radius: var(--card-radius);
            margin-bottom: 12px;
            overflow: hidden;
            transition: border-color .2s ease, box-shadow .2s ease;
        }
        .faq-item.is-open {
            border-color: var(--ice-blue);
            box-shadow: var(--shadow-card);
        }
        .faq-question {
            width: 100%;
            text-align: left;
            padding: 18px 20px;
            background: transparent;
            border: none;
            cursor: pointer;
            font-family: var(--font-title);
            font-size: 16px;
            font-weight: 600;
            color: var(--text-primary);
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
            line-height: 1.5;
        }
        .faq-question i {
            color: var(--accent-orange);
            font-size: 14px;
            transition: transform .25s ease;
            flex-shrink: 0;
        }
        .faq-item.is-open .faq-question i {
            transform: rotate(180deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height .3s ease, padding .3s ease;
            padding: 0 20px;
        }
        .faq-item.is-open .faq-answer {
            max-height: 300px;
            padding: 0 20px 18px;
        }
        .faq-answer p {
            font-size: 14.5px;
            line-height: 1.7;
            color: var(--text-secondary);
        }

        /* CTA */
        .cta-panel {
            background: var(--polar-dark);
            border-radius: var(--card-radius);
            padding: 48px 40px;
            display: grid;
            grid-template-columns: 1.2fr 1fr;
            gap: 40px;
            align-items: center;
            position: relative;
            overflow: hidden;
        }
        .cta-panel::before {
            content: '';
            position: absolute;
            top: -60px;
            right: -40px;
            width: 200px;
            height: 200px;
            background: radial-gradient(circle, rgba(159, 215, 229, .18), transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .cta-title {
            font-family: var(--font-title);
            font-size: 26px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 12px;
            line-height: 1.35;
        }
        .cta-desc {
            font-size: 15px;
            color: var(--snow-ice);
            line-height: 1.65;
        }
        .cta-form {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 14px;
        }
        .cta-form .form-field--full {
            grid-column: span 2;
        }
        .form-field input,
        .form-field select,
        .form-field textarea {
            width: 100%;
            padding: 12px 16px;
            border-radius: var(--btn-radius);
            border: 1px solid rgba(159, 215, 229, .5);
            background: rgba(255, 255, 255, .08);
            color: #F5F9FA;
            font-size: 14.5px;
            transition: border-color .2s ease, box-shadow .2s ease, background-color .2s ease;
        }
        .form-field input::placeholder,
        .form-field textarea::placeholder {
            color: rgba(217, 239, 243, .65);
        }
        .form-field select {
            appearance: none;
            -webkit-appearance: none;
            background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%239FD7E5' stroke-width='1.5' fill='none' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
            background-repeat: no-repeat;
            background-position: right 14px center;
        }
        .form-field select option {
            background: var(--polar-dark);
            color: #F5F9FA;
        }
        .form-field input:focus,
        .form-field select:focus,
        .form-field textarea:focus {
            border-color: var(--accent-orange);
            box-shadow: 0 0 0 3px rgba(255, 90, 38, .15);
            outline: none;
        }

        /* Footer */
        .site-footer {
            background: var(--polar-dark);
            color: #F5F9FA;
            padding: 56px 0 24px;
            margin-top: 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: 32px;
            margin-bottom: 40px;
        }
        .footer-brand__name {
            font-family: var(--font-title);
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 10px;
            color: #fff;
        }
        .footer-brand__desc {
            font-size: 14px;
            color: var(--snow-ice);
            line-height: 1.65;
            max-width: 320px;
        }
        .footer-col h4 {
            font-family: var(--font-title);
            font-size: 15px;
            font-weight: 600;
            color: var(--ice-blue);
            margin-bottom: 14px;
        }
        .footer-col a {
            display: block;
            font-size: 14px;
            color: #F5F9FA;
            padding: 4px 0;
            transition: color .2s ease;
        }
        .footer-col a:hover {
            color: var(--ice-blue);
        }
        .footer-bottom {
            border-top: 1px solid rgba(159, 215, 229, .2);
            padding-top: 20px;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 12px;
            font-size: 13px;
            color: var(--text-muted);
        }
        .footer-bottom a {
            color: var(--ice-blue);
            transition: color .2s ease;
        }
        .footer-bottom a:hover {
            color: #fff;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .cards-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .stats-band {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
            .stat-item:not(:last-child)::after {
                display: none;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .cta-panel {
                grid-template-columns: 1fr;
                padding: 36px 28px;
            }
        }
        @media (max-width: 640px) {
            .section {
                padding: var(--section-padding-mobile);
            }
            .hero-section {
                min-height: 460px;
                padding-top: 100px;
                padding-bottom: 36px;
            }
            .hero-title {
                font-size: 28px;
            }
            .hero-desc {
                font-size: 16px;
            }
            .cards-grid {
                grid-template-columns: 1fr;
            }
            .feature-list {
                grid-template-columns: 1fr;
            }
            .related-grid {
                grid-template-columns: 1fr;
            }
            .stats-band {
                grid-template-columns: 1fr 1fr;
                padding: 24px 18px;
            }
            .stat-number {
                font-size: 26px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
            }
            .cta-form {
                grid-template-columns: 1fr;
            }
            .cta-form .form-field--full {
                grid-column: span 1;
            }
            .pagination-wrap {
                gap: 6px;
            }
            .pagination-btn {
                width: 36px;
                height: 36px;
                font-size: 13px;
            }
        }
        @media (max-width: 400px) {
            .stats-band {
                grid-template-columns: 1fr;
            }
            .nav-logo__text {
                font-size: 15px;
            }
        }

/* roulang page: category2 */
:root {
            --polar-dark: #102126;
            --ice-blue: #9FD7E5;
            --accent-orange: #FF5A26;
            --accent-orange-hover: #E64A18;
            --snow-ice: #D8EFF3;
            --ice-mist: #F5F9FA;
            --line-border: #E5EDEF;
            --text-primary: #1A2A2F;
            --text-secondary: #4B5E63;
            --text-muted: #7A8C90;
            --card-radius: 10px;
            --btn-radius: 6px;
            --badge-radius: 4px;
            --shadow-card: 0 2px 8px rgba(16, 33, 38, .06);
            --shadow-card-hover: 0 8px 24px rgba(16, 33, 38, .12);
            --font-title: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
            --font-body: "Noto Sans SC", "Source Han Sans SC", "Microsoft YaHei", sans-serif;
            --max-width: 1200px;
            --section-padding: 80px 0;
            --section-padding-mobile: 48px 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: var(--font-body);
            font-size: 16px;
            line-height: 1.75;
            color: var(--text-primary);
            background-color: var(--ice-mist);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border: 0;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: color .2s ease, background-color .2s ease, border-color .2s ease;
        }

        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        textarea:focus-visible,
        select:focus-visible {
            outline: 2px solid var(--ice-blue);
            outline-offset: 2px;
        }

        button,
        input,
        textarea,
        select {
            font-family: var(--font-body);
            font-size: 16px;
        }

        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        .section {
            padding: var(--section-padding);
        }

        .section--dark {
            background-color: var(--polar-dark);
            color: #F5F9FA;
        }

        .section--snow {
            background-color: var(--snow-ice);
        }

        .section--light {
            background-color: #fff;
        }

        .section--ice-mist {
            background-color: var(--ice-mist);
        }

        .section__heading {
            font-family: var(--font-title);
            font-size: clamp(26px, 4vw, 34px);
            font-weight: 700;
            line-height: 1.35;
            letter-spacing: .015em;
            color: var(--text-primary);
            margin-bottom: 16px;
        }

        .section__heading--white {
            color: #fff;
        }

        .section__subheading {
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-secondary);
            max-width: 720px;
            margin-bottom: 40px;
        }

        .section__subheading--white {
            color: var(--snow-ice);
        }

        .section__label {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            color: var(--accent-orange);
            letter-spacing: .06em;
            text-transform: uppercase;
            margin-bottom: 12px;
        }

        .section__label--ice {
            color: var(--ice-blue);
        }

        /* Navigation */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 999;
            transition: background-color .3s ease, box-shadow .3s ease, backdrop-filter .3s ease;
            background: rgba(16, 33, 38, .35);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(255, 255, 255, .2);
            box-shadow: 0 1px 0 rgba(255, 255, 255, .15) inset;
        }

        .site-header.is-scrolled {
            background: #102126;
            box-shadow: 0 4px 16px rgba(0, 0, 0, .2);
            border-bottom: 1px solid var(--ice-blue);
        }

        .site-header .nav-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            min-height: 64px;
            gap: 16px;
        }

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }

        .nav-logo__icon {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--ice-blue), var(--snow-ice));
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
        }

        .nav-logo__icon i {
            color: var(--polar-dark);
            font-size: 18px;
        }

        .nav-logo__text {
            font-family: var(--font-title);
            font-size: 19px;
            font-weight: 700;
            color: #F5F9FA;
            letter-spacing: .02em;
            white-space: nowrap;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 4px;
        }

        .nav-links a {
            display: inline-block;
            padding: 8px 12px;
            font-size: 14.5px;
            font-weight: 500;
            color: #F5F9FA;
            position: relative;
            white-space: nowrap;
            letter-spacing: .01em;
        }

        .nav-links a:hover {
            color: var(--ice-blue);
        }

        .nav-links a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 12px;
            right: 12px;
            height: 2px;
            background-color: var(--accent-orange);
            border-radius: 1px;
        }

        .nav-links a.active {
            color: #fff;
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }

        .nav-search-icon {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            border: 1px solid rgba(255, 255, 255, .4);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #F5F9FA;
            cursor: pointer;
            transition: all .2s ease;
            background: transparent;
        }

        .nav-search-icon:hover {
            border-color: var(--ice-blue);
            color: var(--ice-blue);
        }

        .nav-cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 9px 18px;
            background-color: var(--accent-orange);
            color: #fff;
            font-size: 14px;
            font-weight: 600;
            border-radius: var(--btn-radius);
            border: none;
            cursor: pointer;
            transition: all .2s ease;
            white-space: nowrap;
        }

        .nav-cta-btn:hover {
            background-color: var(--accent-orange-hover);
            transform: translateY(-2px);
            color: #fff;
        }

        .nav-hamburger {
            display: none;
            width: 40px;
            height: 40px;
            border: none;
            background: transparent;
            cursor: pointer;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 5px;
            padding: 0;
        }

        .nav-hamburger span {
            display: block;
            width: 22px;
            height: 2px;
            background-color: #fff;
            border-radius: 1px;
            transition: all .3s ease;
        }

        .nav-hamburger.is-open span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }

        .nav-hamburger.is-open span:nth-child(2) {
            opacity: 0;
        }

        .nav-hamburger.is-open span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        .mobile-nav-panel {
            display: none;
            background: #102126;
            border-top: 1px solid rgba(255, 255, 255, .2);
            padding: 16px 24px 24px;
            flex-direction: column;
            gap: 4px;
        }

        .mobile-nav-panel.is-open {
            display: flex;
        }

        .mobile-nav-panel a {
            padding: 12px 0;
            color: #F5F9FA;
            font-size: 16px;
            border-bottom: 1px solid rgba(255, 255, 255, .08);
            display: flex;
            align-items: center;
            justify-content: space-between;
        }

        .mobile-nav-panel a:hover {
            color: var(--ice-blue);
        }

        .mobile-nav-panel a.active {
            color: var(--accent-orange);
        }

        /* Compact Hero */
        .hero-compact {
            padding-top: 120px;
            padding-bottom: 64px;
            background-color: var(--polar-dark);
            background-image: linear-gradient(135deg, rgba(16, 33, 38, .95) 0%, rgba(16, 33, 38, .8) 60%, rgba(255, 90, 38, .15) 100%);
            position: relative;
            overflow: hidden;
        }

        .hero-compact::after {
            content: '';
            position: absolute;
            bottom: -80px;
            right: -60px;
            width: 320px;
            height: 320px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(159, 215, 229, .2) 0%, transparent 70%);
            pointer-events: none;
        }

        .hero-compact .container {
            position: relative;
            z-index: 2;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
            margin-bottom: 20px;
            font-size: 13.5px;
            color: var(--snow-ice);
        }

        .breadcrumb a {
            color: var(--snow-ice);
            transition: color .2s ease;
        }

        .breadcrumb a:hover {
            color: var(--ice-blue);
        }

        .breadcrumb .breadcrumb-current {
            color: var(--accent-orange);
            font-weight: 600;
        }

        .breadcrumb .breadcrumb-sep {
            color: rgba(255, 255, 255, .35);
        }

        .hero-compact__title {
            font-family: var(--font-title);
            font-size: clamp(30px, 5vw, 42px);
            font-weight: 700;
            color: #fff;
            line-height: 1.3;
            margin-bottom: 16px;
            letter-spacing: .015em;
        }

        .hero-compact__subtitle {
            font-size: 17px;
            color: var(--snow-ice);
            line-height: 1.7;
            max-width: 680px;
            margin-bottom: 0;
        }

        .hero-compact__meta {
            display: flex;
            gap: 24px;
            flex-wrap: wrap;
            margin-top: 24px;
            padding-top: 20px;
            border-top: 1px solid rgba(255, 255, 255, .15);
        }

        .hero-compact__meta-item {
            display: flex;
            align-items: center;
            gap: 8px;
            color: rgba(255, 255, 255, .75);
            font-size: 13.5px;
        }

        .hero-compact__meta-item i {
            color: var(--ice-blue);
            font-size: 14px;
        }

        /* Dense list section */
        .dense-list-section {
            background-color: #fff;
        }

        .dense-list-header {
            display: flex;
            align-items: flex-end;
            justify-content: space-between;
            gap: 20px;
            flex-wrap: wrap;
            margin-bottom: 24px;
        }

        .dense-list-header .section__heading {
            margin-bottom: 0;
            font-size: clamp(22px, 3vw, 28px);
        }

        .dense-list-count {
            font-size: 13px;
            color: var(--text-muted);
            white-space: nowrap;
        }

        .dense-list-count strong {
            color: var(--accent-orange);
            font-weight: 700;
        }

        .dense-list {
            list-style: none;
            margin: 0;
            padding: 0;
            border-top: 1px solid var(--line-border);
        }

        .dense-list__item {
            display: flex;
            align-items: flex-start;
            gap: 20px;
            padding: 24px 4px;
            border-bottom: 1px solid var(--line-border);
            transition: background-color .2s ease, padding-left .2s ease;
            position: relative;
        }

        .dense-list__item:hover {
            background-color: var(--ice-mist);
            padding-left: 12px;
        }

        .dense-list__date {
            flex-shrink: 0;
            width: 90px;
            font-size: 13px;
            color: var(--text-muted);
            font-weight: 500;
            padding-top: 3px;
            letter-spacing: .03em;
        }

        .dense-list__body {
            flex: 1;
            min-width: 0;
        }

        .dense-list__title {
            font-family: var(--font-title);
            font-size: 17px;
            font-weight: 600;
            color: var(--text-primary);
            line-height: 1.45;
            margin-bottom: 6px;
            transition: color .2s ease;
        }

        .dense-list__item:hover .dense-list__title {
            color: var(--accent-orange);
        }

        .dense-list__summary {
            font-size: 14.5px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 10px;
            max-width: 720px;
        }

        .dense-list__tags {
            display: flex;
            gap: 8px;
            flex-wrap: wrap;
        }

        .dense-list__tag {
            display: inline-block;
            padding: 3px 10px;
            font-size: 12px;
            font-weight: 500;
            color: var(--text-secondary);
            background-color: var(--snow-ice);
            border-radius: var(--badge-radius);
            letter-spacing: .02em;
            transition: all .2s ease;
        }

        .dense-list__tag:hover {
            background-color: var(--ice-blue);
            color: var(--polar-dark);
        }

        /* Pagination */
        .pagination-section {
            background-color: #fff;
            padding-top: 0;
            padding-bottom: 48px;
        }

        .pagination {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            flex-wrap: wrap;
        }

        .pagination__btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-width: 40px;
            height: 40px;
            padding: 0 14px;
            border: 1px solid var(--line-border);
            border-radius: var(--btn-radius);
            background-color: #fff;
            color: var(--text-secondary);
            font-size: 14px;
            font-weight: 500;
            cursor: pointer;
            transition: all .2s ease;
        }

        .pagination__btn:hover {
            border-color: var(--ice-blue);
            color: var(--text-primary);
            background-color: var(--ice-mist);
        }

        .pagination__btn.is-current {
            background-color: var(--polar-dark);
            border-color: var(--polar-dark);
            color: #fff;
            font-weight: 700;
        }

        .pagination__btn.is-disabled {
            opacity: .45;
            cursor: not-allowed;
        }

        .pagination__btn.is-disabled:hover {
            border-color: var(--line-border);
            background-color: #fff;
            color: var(--text-secondary);
        }

        /* Stats band */
        .stats-band {
            background-color: var(--polar-dark);
            padding: 40px 0;
            position: relative;
            overflow: hidden;
        }

        .stats-band::before {
            content: '';
            position: absolute;
            top: -60px;
            left: -40px;
            width: 200px;
            height: 200px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(159, 215, 229, .12) 0%, transparent 70%);
            pointer-events: none;
        }

        .stats-grid {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
            flex-wrap: wrap;
            position: relative;
            z-index: 1;
        }

        .stats-grid__item {
            display: flex;
            align-items: baseline;
            gap: 10px;
        }

        .stats-grid__number {
            font-family: var(--font-title);
            font-size: clamp(28px, 4vw, 34px);
            font-weight: 700;
            color: var(--accent-orange);
            letter-spacing: .01em;
            line-height: 1;
        }

        .stats-grid__label {
            font-size: 13px;
            color: var(--snow-ice);
            line-height: 1.3;
            letter-spacing: .03em;
        }

        .stats-grid__divider {
            width: 1px;
            height: 36px;
            background-color: rgba(255, 255, 255, .18);
            flex-shrink: 0;
        }

        /* Scenarios */
        .scenarios-section {
            background-color: var(--ice-mist);
        }

        .scenarios-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
        }

        .scenario-card {
            background-color: #fff;
            border-radius: var(--card-radius);
            border: 1px solid var(--line-border);
            box-shadow: var(--shadow-card);
            padding: 24px;
            transition: all .25s ease;
            display: flex;
            gap: 16px;
            align-items: flex-start;
        }

        .scenario-card:hover {
            box-shadow: var(--shadow-card-hover);
            border-color: var(--ice-blue);
            transform: translateY(-3px);
        }

        .scenario-card__icon {
            width: 44px;
            height: 44px;
            border-radius: 8px;
            background-color: var(--snow-ice);
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
        }

        .scenario-card__icon i {
            color: var(--polar-dark);
            font-size: 18px;
        }

        .scenario-card__title {
            font-family: var(--font-title);
            font-size: 16.5px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 6px;
        }

        .scenario-card__desc {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin: 0;
        }

        /* Process section */
        .process-section {
            background-color: #fff;
        }

        .process-steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            counter-reset: step-counter;
        }

        .process-step {
            padding: 28px 22px;
            border-radius: var(--card-radius);
            background-color: var(--ice-mist);
            border: 1px solid var(--line-border);
            position: relative;
            transition: all .25s ease;
            counter-increment: step-counter;
        }

        .process-step:hover {
            border-color: var(--ice-blue);
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-3px);
        }

        .process-step::before {
            content: counter(step-counter, decimal-leading-zero);
            font-family: var(--font-title);
            font-size: 32px;
            font-weight: 700;
            color: var(--ice-blue);
            display: block;
            margin-bottom: 12px;
            letter-spacing: .02em;
        }

        .process-step__title {
            font-family: var(--font-title);
            font-size: 16px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 8px;
        }

        .process-step__desc {
            font-size: 13.5px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin: 0;
        }

        /* Related */
        .related-section {
            background-color: var(--snow-ice);
        }

        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

        .related-card {
            background-color: #fff;
            border-radius: var(--card-radius);
            border: 1px solid var(--line-border);
            box-shadow: var(--shadow-card);
            overflow: hidden;
            transition: all .25s ease;
            display: flex;
            flex-direction: column;
        }

        .related-card:hover {
            box-shadow: var(--shadow-card-hover);
            border-color: var(--ice-blue);
            transform: translateY(-4px);
        }

        .related-card__img {
            width: 100%;
            aspect-ratio: 16/9;
            object-fit: cover;
            display: block;
            background-color: var(--polar-dark);
        }

        .related-card__body {
            padding: 20px;
            flex: 1;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .related-card__title {
            font-family: var(--font-title);
            font-size: 15.5px;
            font-weight: 600;
            color: var(--text-primary);
            line-height: 1.45;
        }

        .related-card__desc {
            font-size: 13.5px;
            color: var(--text-secondary);
            line-height: 1.65;
            margin: 0;
            flex: 1;
        }

        .related-card__link {
            font-size: 13.5px;
            font-weight: 600;
            color: var(--accent-orange);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: gap .2s ease;
        }

        .related-card__link:hover {
            gap: 10px;
            color: var(--accent-orange-hover);
        }

        /* FAQ */
        .faq-section {
            background-color: #fff;
        }

        .faq-list {
            max-width: 860px;
            margin: 0 auto;
        }

        .faq-item {
            border: 1px solid var(--line-border);
            border-radius: var(--card-radius);
            margin-bottom: 12px;
            background-color: #fff;
            transition: all .2s ease;
            overflow: hidden;
        }

        .faq-item.is-open {
            background-color: var(--snow-ice);
            border-color: var(--ice-blue);
        }

        .faq-item__trigger {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 18px 20px;
            cursor: pointer;
            font-family: var(--font-title);
            font-size: 15.5px;
            font-weight: 600;
            color: var(--polar-dark);
            border: none;
            background: transparent;
            width: 100%;
            text-align: left;
            transition: color .2s ease;
        }

        .faq-item__trigger:hover {
            color: var(--accent-orange);
        }

        .faq-item__icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background-color: var(--snow-ice);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            color: var(--text-secondary);
            transition: all .25s ease;
        }

        .faq-item.is-open .faq-item__icon {
            background-color: var(--accent-orange);
            color: #fff;
            transform: rotate(180deg);
        }

        .faq-item__content {
            max-height: 0;
            overflow: hidden;
            transition: max-height .35s ease, padding .3s ease;
            padding: 0 20px;
        }

        .faq-item.is-open .faq-item__content {
            max-height: 200px;
            padding: 0 20px 20px;
        }

        .faq-item__answer {
            font-size: 14.5px;
            line-height: 1.75;
            color: var(--text-secondary);
            margin: 0;
        }

        /* CTA section */
        .cta-section {
            background-color: var(--polar-dark);
            background-image: linear-gradient(135deg, rgba(16, 33, 38, .97) 0%, rgba(16, 33, 38, .85) 55%, rgba(255, 90, 38, .18) 100%);
            position: relative;
            overflow: hidden;
        }

        .cta-section::after {
            content: '';
            position: absolute;
            bottom: -100px;
            right: -40px;
            width: 360px;
            height: 360px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(159, 215, 229, .15) 0%, transparent 70%);
            pointer-events: none;
        }

        .cta-wrap {
            display: flex;
            gap: 40px;
            align-items: flex-start;
            flex-wrap: wrap;
            position: relative;
            z-index: 1;
        }

        .cta-info {
            flex: 1;
            min-width: 280px;
        }

        .cta-info__title {
            font-family: var(--font-title);
            font-size: clamp(24px, 3vw, 30px);
            font-weight: 700;
            color: #fff;
            line-height: 1.35;
            margin-bottom: 14px;
        }

        .cta-info__desc {
            font-size: 15px;
            color: var(--snow-ice);
            line-height: 1.7;
            margin-bottom: 24px;
            max-width: 480px;
        }

        .cta-info__contact {
            display: flex;
            gap: 20px;
            flex-wrap: wrap;
            font-size: 14px;
            color: rgba(255, 255, 255, .7);
        }

        .cta-info__contact i {
            color: var(--ice-blue);
            margin-right: 6px;
        }

        .cta-form {
            flex: 1;
            min-width: 320px;
            background: rgba(255, 255, 255, .06);
            border: 1px solid rgba(159, 215, 229, .25);
            border-radius: var(--card-radius);
            padding: 28px;
            backdrop-filter: blur(6px);
        }

        .cta-form__title {
            font-family: var(--font-title);
            font-size: 17px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 16px;
        }

        .form-group {
            margin-bottom: 14px;
        }

        .form-group label {
            display: block;
            font-size: 13px;
            font-weight: 500;
            color: var(--snow-ice);
            margin-bottom: 5px;
        }

        .form-group input,
        .form-group select,
        .form-group textarea {
            width: 100%;
            padding: 10px 14px;
            background: rgba(255, 255, 255, .08);
            border: 1px solid rgba(159, 215, 229, .35);
            border-radius: var(--btn-radius);
            color: #fff;
            font-size: 14.5px;
            transition: all .2s ease;
            box-sizing: border-box;
            -webkit-appearance: none;
            -moz-appearance: none;
            appearance: none;
        }

        .form-group input::placeholder,
        .form-group textarea::placeholder {
            color: rgba(255, 255, 255, .4);
        }

        .form-group select {
            background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath fill='%239FD7E5' d='M6 8L0 0h12z'/%3E%3C/svg%3E");
            background-repeat: no-repeat;
            background-position: right 12px center;
            padding-right: 36px;
            color: #fff;
            cursor: pointer;
        }

        .form-group select option {
            color: var(--text-primary);
            background-color: #fff;
        }

        .form-group input:focus,
        .form-group select:focus,
        .form-group textarea:focus {
            border-color: var(--accent-orange);
            box-shadow: 0 0 0 3px rgba(255, 90, 38, .15);
            outline: none;
            background: rgba(255, 255, 255, .1);
        }

        .form-group textarea {
            min-height: 90px;
            resize: vertical;
        }

        .btn-submit {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 28px;
            background-color: var(--accent-orange);
            color: #fff;
            font-size: 15px;
            font-weight: 600;
            border: none;
            border-radius: var(--btn-radius);
            cursor: pointer;
            transition: all .2s ease;
            width: 100%;
        }

        .btn-submit:hover {
            background-color: var(--accent-orange-hover);
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(255, 90, 38, .3);
        }

        /* Footer */
        .site-footer {
            background-color: var(--polar-dark);
            color: var(--snow-ice);
            padding: 48px 0 24px;
            border-top: 1px solid rgba(255, 255, 255, .08);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 32px;
            margin-bottom: 32px;
        }

        .footer-brand__name {
            font-family: var(--font-title);
            font-size: 20px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 10px;
            letter-spacing: .02em;
        }

        .footer-brand__desc {
            font-size: 13.5px;
            color: rgba(255, 255, 255, .6);
            line-height: 1.7;
            margin: 0;
            max-width: 320px;
        }

        .footer-col h4 {
            font-family: var(--font-title);
            font-size: 14px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 14px;
            letter-spacing: .04em;
        }

        .footer-col a {
            display: block;
            font-size: 13.5px;
            color: rgba(255, 255, 255, .6);
            padding: 5px 0;
            transition: color .2s ease;
        }

        .footer-col a:hover {
            color: var(--ice-blue);
        }

        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            flex-wrap: wrap;
            padding-top: 20px;
            border-top: 1px solid rgba(255, 255, 255, .1);
            font-size: 13px;
            color: rgba(255, 255, 255, .55);
        }

        .footer-bottom a {
            color: rgba(255, 255, 255, .55);
            transition: color .2s ease;
        }

        .footer-bottom a:hover {
            color: var(--ice-blue);
        }

        .footer-bottom__legal a {
            margin: 0 2px;
        }

        .footer-bottom__icp {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }

        /* Buttons general */
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 24px;
            background-color: var(--accent-orange);
            color: #fff;
            font-size: 15px;
            font-weight: 600;
            border: none;
            border-radius: var(--btn-radius);
            cursor: pointer;
            transition: all .2s ease;
        }

        .btn-primary:hover {
            background-color: var(--accent-orange-hover);
            transform: translateY(-2px);
            color: #fff;
            box-shadow: 0 6px 20px rgba(255, 90, 38, .3);
        }

        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 11px 22px;
            background: transparent;
            color: var(--polar-dark);
            font-size: 15px;
            font-weight: 600;
            border: 1.5px solid var(--polar-dark);
            border-radius: var(--btn-radius);
            cursor: pointer;
            transition: all .2s ease;
        }

        .btn-secondary:hover {
            background-color: var(--polar-dark);
            color: #fff;
            transform: translateY(-2px);
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .navigation .nav-links {
                gap: 0;
            }

            .nav-links a {
                padding: 8px 8px;
                font-size: 13.5px;
            }

            .process-steps {
                grid-template-columns: repeat(2, 1fr);
            }

            .related-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            .section {
                padding: var(--section-padding-mobile);
            }

            .nav-links {
                display: none;
            }

            .nav-actions .nav-cta-btn {
                display: none;
            }

            .nav-hamburger {
                display: flex;
            }

            .mobile-nav-panel.is-open {
                display: flex;
            }

            .hero-compact {
                padding-top: 100px;
                padding-bottom: 48px;
            }

            .hero-compact__title {
                font-size: 26px;
            }

            .hero-compact__subtitle {
                font-size: 15px;
            }

            .dense-list__item {
                flex-direction: column;
                gap: 8px;
                padding: 18px 2px;
            }

            .dense-list__date {
                width: auto;
                padding-top: 0;
            }

            .stats-grid {
                flex-direction: column;
                align-items: flex-start;
                gap: 14px;
            }

            .stats-grid__divider {
                display: none;
            }

            .scenarios-grid {
                grid-template-columns: 1fr;
            }

            .process-steps {
                grid-template-columns: 1fr;
                gap: 12px;
            }

            .related-grid {
                grid-template-columns: 1fr;
            }

            .cta-wrap {
                flex-direction: column;
            }

            .cta-form {
                min-width: auto;
                width: 100%;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }

            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }

            .container {
                padding-left: 16px;
                padding-right: 16px;
            }

            .btn-secondary {
                padding: 10px 18px;
                font-size: 14px;
            }
        }

        @media (max-width: 520px) {
            .hero-compact__title {
                font-size: 24px;
            }

            .hero-compact__meta {
                flex-direction: column;
                gap: 10px;
            }

            .dense-list-header {
                flex-direction: column;
                align-items: flex-start;
                gap: 8px;
            }

            .pagination__btn {
                min-width: 34px;
                height: 34px;
                padding: 0 10px;
                font-size: 13px;
            }

            .section__heading {
                font-size: 22px;
            }
        }

/* roulang page: category5 */
:root {
            --polar-dark: #102126;
            --ice-blue: #9FD7E5;
            --accent-orange: #FF5A26;
            --accent-orange-hover: #E64A18;
            --snow-ice: #D8EFF3;
            --ice-mist: #F5F9FA;
            --line-border: #E5EDEF;
            --text-primary: #1A2A2F;
            --text-secondary: #4B5E63;
            --text-muted: #7A8C90;
            --card-radius: 10px;
            --btn-radius: 6px;
            --badge-radius: 4px;
            --shadow-card: 0 2px 8px rgba(16, 33, 38, .06);
            --shadow-card-hover: 0 8px 24px rgba(16, 33, 38, .12);
            --font-title: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
            --font-body: "Noto Sans SC", "Source Han Sans SC", "Microsoft YaHei", sans-serif;
            --max-width: 1200px;
            --section-padding: 80px 0;
            --section-padding-mobile: 48px 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        *, *::before, *::after {
            box-sizing: border-box;
        }

        body {
            font-family: var(--font-body);
            font-size: 16px;
            line-height: 1.75;
            color: var(--text-primary);
            background-color: var(--ice-mist);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            margin: 0;
            padding: 0;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border: 0;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: color .2s ease, background-color .2s ease, border-color .2s ease;
        }

        a:hover {
            color: var(--accent-orange);
        }

        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        textarea:focus-visible,
        select:focus-visible {
            outline: 2px solid var(--ice-blue);
            outline-offset: 2px;
        }

        button,
        input,
        textarea,
        select {
            font-family: var(--font-body);
            font-size: 16px;
        }

        h1, h2, h3, h4, h5, h6 {
            font-family: var(--font-title);
            font-weight: 700;
            line-height: 1.35;
            letter-spacing: .015em;
            color: var(--text-primary);
            margin: 0 0 16px 0;
        }

        p {
            margin: 0 0 1.25em 0;
        }

        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        .section {
            padding: var(--section-padding);
        }

        .section--dark {
            background-color: var(--polar-dark);
            color: #F5F9FA;
        }

        .section--dark h2,
        .section--dark h3 {
            color: #ffffff;
        }

        .section--snow {
            background-color: var(--snow-ice);
        }

        .section--light {
            background-color: #ffffff;
        }

        .section__heading {
            font-size: clamp(26px, 4vw, 34px);
            font-weight: 700;
            line-height: 1.35;
            letter-spacing: .015em;
            margin-bottom: 16px;
        }

        .section__heading--white {
            color: #ffffff;
        }

        .section__subheading {
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-secondary);
            max-width: 720px;
            margin-bottom: 40px;
        }

        .section__subheading--white {
            color: var(--snow-ice);
        }

        .section__label {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            color: var(--accent-orange);
            letter-spacing: .06em;
            text-transform: uppercase;
            margin-bottom: 12px;
        }

        .section__label--ice {
            color: var(--ice-blue);
        }

        /* Navigation */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 999;
            transition: background-color .3s ease, box-shadow .3s ease, border-color .3s ease;
            background: rgba(16, 33, 38, .35);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(255, 255, 255, .2);
            box-shadow: 0 1px 0 rgba(255, 255, 255, .15) inset;
        }

        .site-header.is-scrolled {
            background: #102126;
            box-shadow: 0 4px 16px rgba(0, 0, 0, .2);
            border-bottom: 1px solid var(--ice-blue);
        }

        .site-header .nav-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            min-height: 64px;
            gap: 16px;
        }

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }

        .nav-logo__icon {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--ice-blue), var(--snow-ice));
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
        }

        .nav-logo__icon i {
            color: var(--polar-dark);
            font-size: 18px;
        }

        .nav-logo__text {
            font-family: var(--font-title);
            font-size: 19px;
            font-weight: 700;
            color: #F5F9FA;
            letter-spacing: .02em;
            white-space: nowrap;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 4px;
        }

        .nav-links a {
            display: inline-block;
            padding: 8px 12px;
            font-size: 14.5px;
            font-weight: 500;
            color: #F5F9FA;
            position: relative;
            white-space: nowrap;
            letter-spacing: .01em;
        }

        .nav-links a:hover {
            color: var(--ice-blue);
        }

        .nav-links a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 12px;
            right: 12px;
            height: 2px;
            background-color: var(--accent-orange);
            border-radius: 1px;
        }

        .nav-links a.active {
            color: #ffffff;
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }

        .nav-search-icon {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            border: 1px solid rgba(255, 255, 255, .4);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #ffffff;
            background: transparent;
            cursor: pointer;
            transition: all .2s ease;
        }

        .nav-search-icon:hover {
            border-color: var(--ice-blue);
            color: var(--ice-blue);
        }

        .btn {
            display: inline-block;
            padding: 10px 20px;
            border-radius: var(--btn-radius);
            font-weight: 600;
            font-size: 15px;
            letter-spacing: .01em;
            text-align: center;
            cursor: pointer;
            transition: all .2s ease;
            border: 1.5px solid transparent;
            line-height: 1.4;
        }

        .btn--primary {
            background-color: var(--accent-orange);
            color: #ffffff;
            border-color: var(--accent-orange);
        }

        .btn--primary:hover {
            background-color: var(--accent-orange-hover);
            border-color: var(--accent-orange-hover);
            color: #ffffff;
            transform: translateY(-2px);
            box-shadow: 0 6px 16px rgba(255, 90, 38, .25);
        }

        .btn--ghost {
            background-color: transparent;
            color: #ffffff;
            border-color: rgba(255, 255, 255, .6);
        }

        .btn--ghost:hover {
            background-color: #ffffff;
            color: var(--polar-dark);
            border-color: #ffffff;
            transform: translateY(-2px);
        }

        .btn--ghost-dark {
            background-color: transparent;
            color: var(--polar-dark);
            border-color: var(--polar-dark);
        }

        .btn--ghost-dark:hover {
            background-color: var(--polar-dark);
            color: #ffffff;
            border-color: var(--polar-dark);
            transform: translateY(-2px);
        }

        .nav-hamburger {
            display: none;
            width: 40px;
            height: 40px;
            background: transparent;
            border: 1px solid rgba(255, 255, 255, .4);
            border-radius: var(--btn-radius);
            color: #ffffff;
            cursor: pointer;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            transition: all .2s ease;
        }

        .nav-hamburger:hover {
            border-color: var(--ice-blue);
            color: var(--ice-blue);
        }

        .nav-hamburger i {
            font-size: 18px;
        }

        /* Mobile Nav Drawer */
        .mobile-nav-drawer {
            display: none;
            background: #102126;
            border-top: 1px solid rgba(255, 255, 255, .1);
            padding: 16px 24px 24px;
            position: absolute;
            top: 100%;
            left: 0;
            right: 0;
            z-index: 1000;
            box-shadow: 0 16px 32px rgba(0, 0, 0, .3);
        }

        .mobile-nav-drawer.is-open {
            display: block;
        }

        .mobile-nav-drawer a {
            display: block;
            padding: 12px 0;
            font-size: 16px;
            font-weight: 500;
            color: #F5F9FA;
            border-bottom: 1px solid rgba(255, 255, 255, .08);
        }

        .mobile-nav-drawer a:last-child {
            border-bottom: none;
        }

        .mobile-nav-drawer a:hover {
            color: var(--ice-blue);
        }

        .mobile-nav-drawer a.active {
            color: var(--accent-orange);
        }

        /* Hero */
        .page-hero {
            position: relative;
            min-height: 480px;
            display: flex;
            align-items: center;
            padding: 120px 0 80px;
            background-image: url('/assets/images/backpic/back-2.webp');
            background-size: cover;
            background-position: center;
            overflow: hidden;
        }

        .page-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(16, 33, 38, .88) 0%, rgba(16, 33, 38, .65) 55%, rgba(255, 90, 38, .22) 100%);
            z-index: 1;
        }

        .page-hero .container {
            position: relative;
            z-index: 2;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: rgba(255, 255, 255, .7);
            margin-bottom: 24px;
            flex-wrap: wrap;
        }

        .breadcrumb a {
            color: var(--snow-ice);
            transition: color .2s ease;
        }

        .breadcrumb a:hover {
            color: var(--accent-orange);
        }

        .breadcrumb i {
            font-size: 10px;
            color: rgba(255, 255, 255, .4);
        }

        .page-hero__title {
            font-size: clamp(30px, 5vw, 42px);
            color: #ffffff;
            margin-bottom: 20px;
            font-weight: 700;
            letter-spacing: .02em;
        }

        .page-hero__subtitle {
            font-size: 18px;
            color: var(--snow-ice);
            max-width: 640px;
            line-height: 1.7;
            margin-bottom: 28px;
        }

        .page-hero__actions {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
        }

        /* Guide Overview */
        .guide-overview {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 32px;
            align-items: center;
        }

        .guide-overview__image {
            border-radius: var(--card-radius);
            overflow: hidden;
            box-shadow: var(--shadow-card-hover);
        }

        .guide-overview__image img {
            width: 100%;
            height: auto;
            object-fit: cover;
        }

        .guide-overview__content h3 {
            font-size: 22px;
            margin-bottom: 12px;
        }

        .guide-overview__content p {
            color: var(--text-secondary);
            font-size: 16px;
        }

        .guide-overview__tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-top: 16px;
        }

        .badge {
            display: inline-block;
            padding: 4px 10px;
            border-radius: var(--badge-radius);
            font-size: 12.5px;
            font-weight: 600;
            letter-spacing: .03em;
            background-color: var(--snow-ice);
            color: var(--text-primary);
            border: 1px solid var(--line-border);
        }

        .badge--orange {
            background-color: rgba(255, 90, 38, .1);
            color: var(--accent-orange);
            border-color: rgba(255, 90, 38, .2);
        }

        .badge--ice {
            background-color: rgba(159, 215, 229, .15);
            color: var(--polar-dark);
            border-color: rgba(159, 215, 229, .4);
        }

        /* Guide Directory */
        .guide-directory {
            background-color: #ffffff;
            border-radius: var(--card-radius);
            box-shadow: var(--shadow-card);
            border: 1px solid var(--line-border);
            padding: 28px;
        }

        .guide-directory__grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 12px;
        }

        .guide-directory__item {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 16px;
            border-radius: var(--btn-radius);
            border: 1px solid var(--line-border);
            transition: all .2s ease;
            background-color: var(--ice-mist);
            text-decoration: none;
            color: var(--text-primary);
        }

        .guide-directory__item:hover {
            border-color: var(--ice-blue);
            background-color: var(--snow-ice);
            transform: translateY(-2px);
            box-shadow: var(--shadow-card);
        }

        .guide-directory__number {
            font-family: var(--font-title);
            font-size: 24px;
            font-weight: 700;
            color: var(--ice-blue);
            flex-shrink: 0;
            min-width: 40px;
            text-align: center;
        }

        .guide-directory__text {
            font-size: 14.5px;
            font-weight: 600;
            color: var(--text-primary);
            line-height: 1.4;
        }

        /* Step Content */
        .step-block {
            display: grid;
            grid-template-columns: 320px 1fr;
            gap: 32px;
            align-items: start;
        }

        .step-block--reverse {
            grid-template-columns: 1fr 320px;
        }

        .step-block__image {
            border-radius: var(--card-radius);
            overflow: hidden;
            box-shadow: var(--shadow-card);
        }

        .step-block__image img {
            width: 100%;
            height: auto;
            object-fit: cover;
        }

        .step-block__content h3 {
            font-size: 22px;
            margin-bottom: 16px;
            color: var(--text-primary);
        }

        .step-block__content p {
            color: var(--text-secondary);
            margin-bottom: 16px;
        }

        .step-number {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-family: var(--font-title);
            font-size: 14px;
            font-weight: 700;
            color: var(--accent-orange);
            letter-spacing: .06em;
            margin-bottom: 8px;
        }

        .step-number__digit {
            font-size: 32px;
            color: var(--ice-blue);
            font-weight: 800;
            line-height: 1;
        }

        .checklist {
            list-style: none;
            padding: 0;
            margin: 0 0 16px 0;
        }

        .checklist li {
            position: relative;
            padding-left: 28px;
            margin-bottom: 8px;
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        .checklist li::before {
            content: '\f00c';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            position: absolute;
            left: 0;
            top: 1px;
            color: var(--accent-orange);
            font-size: 14px;
        }

        /* Step Pagination */
        .step-pagination {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            background-color: #ffffff;
            border-radius: var(--card-radius);
            box-shadow: var(--shadow-card);
            border: 1px solid var(--line-border);
            padding: 16px 20px;
            flex-wrap: wrap;
        }

        .step-pagination__btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            font-weight: 600;
            color: var(--text-primary);
            padding: 8px 16px;
            border-radius: var(--btn-radius);
            border: 1.5px solid var(--line-border);
            transition: all .2s ease;
            background-color: #ffffff;
            cursor: pointer;
        }

        .step-pagination__btn:hover {
            border-color: var(--ice-blue);
            color: var(--polar-dark);
            background-color: var(--snow-ice);
        }

        .step-pagination__btn--disabled {
            opacity: .4;
            pointer-events: none;
        }

        .step-pagination__info {
            font-size: 13px;
            color: var(--text-muted);
        }

        /* Data Panel */
        .data-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 0;
            background-color: var(--polar-dark);
            border-radius: var(--card-radius);
            overflow: hidden;
            box-shadow: var(--shadow-card-hover);
        }

        .data-grid__item {
            padding: 28px 24px;
            text-align: center;
            border-right: 1px solid rgba(255, 255, 255, .08);
        }

        .data-grid__item:last-child {
            border-right: none;
        }

        .data-grid__number {
            font-family: var(--font-title);
            font-size: 32px;
            font-weight: 800;
            color: var(--accent-orange);
            line-height: 1.2;
            margin-bottom: 6px;
        }

        .data-grid__label {
            font-size: 13px;
            color: var(--snow-ice);
            letter-spacing: .05em;
            font-weight: 500;
        }

        /* FAQ */
        .faq-accordion {
            max-width: 800px;
            margin: 0 auto;
        }

        .faq-item {
            background-color: #ffffff;
            border: 1px solid var(--line-border);
            border-radius: var(--btn-radius);
            margin-bottom: 10px;
            overflow: hidden;
            transition: all .2s ease;
        }

        .faq-item:hover {
            border-color: var(--ice-blue);
        }

        .faq-item.is-active {
            border-color: var(--ice-blue);
            box-shadow: var(--shadow-card);
        }

        .faq-item__header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 16px 20px;
            cursor: pointer;
            user-select: none;
            transition: background-color .2s ease;
            font-family: var(--font-title);
            font-size: 16px;
            font-weight: 600;
            color: var(--text-primary);
        }

        .faq-item__header:hover {
            background-color: var(--snow-ice);
        }

        .faq-item.is-active .faq-item__header {
            background-color: var(--snow-ice);
        }

        .faq-item__icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background-color: var(--snow-ice);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-orange);
            transition: transform .3s ease;
        }

        .faq-item.is-active .faq-item__icon {
            transform: rotate(45deg);
            background-color: var(--accent-orange);
            color: #ffffff;
        }

        .faq-item__body {
            max-height: 0;
            overflow: hidden;
            transition: max-height .3s ease, padding .3s ease;
            padding: 0 20px;
        }

        .faq-item.is-active .faq-item__body {
            max-height: 400px;
            padding: 0 20px 20px;
        }

        .faq-item__body p {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 0;
        }

        /* Related Recommendations */
        .related-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 20px;
        }

        .related-card {
            display: block;
            background-color: #ffffff;
            border: 1px solid var(--line-border);
            border-radius: var(--card-radius);
            padding: 24px;
            box-shadow: var(--shadow-card);
            transition: all .25s ease;
            text-decoration: none;
            color: var(--text-primary);
        }

        .related-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-card-hover);
            border-color: var(--ice-blue);
            color: var(--text-primary);
        }

        .related-card__icon {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--snow-ice), var(--ice-blue));
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 14px;
        }

        .related-card__icon i {
            color: var(--polar-dark);
            font-size: 18px;
        }

        .related-card h4 {
            font-size: 17px;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--text-primary);
        }

        .related-card p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
            margin-bottom: 12px;
        }

        .related-card__link {
            font-size: 13.5px;
            font-weight: 600;
            color: var(--accent-orange);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        /* CTA */
        .cta-block {
            background: linear-gradient(135deg, var(--polar-dark) 0%, #1a3a40 60%, rgba(255, 90, 38, .15) 100%);
            border-radius: var(--card-radius);
            padding: 48px 40px;
            display: grid;
            grid-template-columns: 1fr auto;
            gap: 32px;
            align-items: center;
        }

        .cta-block__content h2 {
            color: #ffffff;
            font-size: 26px;
            margin-bottom: 10px;
        }

        .cta-block__content p {
            color: var(--snow-ice);
            max-width: 560px;
            margin-bottom: 0;
        }

        /* Footer */
        .site-footer {
            background-color: var(--polar-dark);
            color: #F5F9FA;
            padding: 60px 0 28px;
            margin-top: 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: 32px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, .08);
        }

        .footer-brand__name {
            font-family: var(--font-title);
            font-size: 22px;
            font-weight: 700;
            color: #ffffff;
            margin-bottom: 12px;
        }

        .footer-brand__desc {
            font-size: 14px;
            color: rgba(255, 255, 255, .6);
            line-height: 1.7;
            max-width: 340px;
        }

        .footer-col h4 {
            font-size: 15px;
            font-weight: 600;
            color: #ffffff;
            margin-bottom: 16px;
            letter-spacing: .04em;
        }

        .footer-col a {
            display: block;
            font-size: 14px;
            color: rgba(255, 255, 255, .6);
            margin-bottom: 10px;
            transition: color .2s ease;
        }

        .footer-col a:hover {
            color: var(--ice-blue);
        }

        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 16px;
            padding-top: 24px;
        }

        .footer-bottom__legal {
            font-size: 13px;
            color: rgba(255, 255, 255, .5);
        }

        .footer-bottom__legal a {
            color: rgba(255, 255, 255, .6);
            transition: color .2s ease;
        }

        .footer-bottom__legal a:hover {
            color: var(--ice-blue);
        }

        .footer-bottom__icp {
            display: flex;
            gap: 16px;
            font-size: 13px;
            color: rgba(255, 255, 255, .5);
            flex-wrap: wrap;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .data-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 0;
            }

            .data-grid__item:nth-child(2) {
                border-right: none;
            }

            .data-grid__item:nth-child(1),
            .data-grid__item:nth-child(2) {
                border-bottom: 1px solid rgba(255, 255, 255, .08);
            }

            .step-block {
                grid-template-columns: 1fr;
                gap: 20px;
            }

            .step-block--reverse {
                grid-template-columns: 1fr;
            }

            .step-block--reverse .step-block__image {
                order: 1;
            }

            .step-block--reverse .step-block__content {
                order: 2;
            }

            .guide-overview {
                grid-template-columns: 1fr;
                gap: 24px;
            }

            .cta-block {
                grid-template-columns: 1fr;
                text-align: center;
            }

            .cta-block__content p {
                margin-left: auto;
                margin-right: auto;
            }

            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 768px) {
            .nav-links {
                display: none;
            }

            .nav-actions .btn {
                display: none;
            }

            .nav-hamburger {
                display: flex;
            }

            .section {
                padding: var(--section-padding-mobile);
            }

            .page-hero {
                min-height: 380px;
                padding: 100px 0 60px;
            }

            .page-hero__title {
                font-size: 26px;
            }

            .page-hero__subtitle {
                font-size: 16px;
            }

            .data-grid__item {
                padding: 20px 16px;
            }

            .data-grid__number {
                font-size: 24px;
            }

            .faq-item__header {
                font-size: 15px;
                padding: 14px 16px;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }

            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
            }

            .guide-directory__grid {
                grid-template-columns: 1fr;
            }

            .step-pagination {
                flex-direction: column;
                align-items: stretch;
                text-align: center;
            }

            .step-pagination__btn {
                justify-content: center;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }

            .data-grid {
                grid-template-columns: 1fr;
            }

            .data-grid__item {
                border-right: none;
                border-bottom: 1px solid rgba(255, 255, 255, .08);
            }

            .data-grid__item:last-child {
                border-bottom: none;
            }

            .cta-block {
                padding: 32px 20px;
            }

            .cta-block__content h2 {
                font-size: 20px;
            }

            .btn {
                padding: 9px 16px;
                font-size: 14px;
            }
        }

/* roulang page: category4 */
:root {
        --polar-dark: #102126;
        --ice-blue: #9FD7E5;
        --accent-orange: #FF5A26;
        --accent-orange-hover: #E64A18;
        --snow-ice: #D8EFF3;
        --ice-mist: #F5F9FA;
        --line-border: #E5EDEF;
        --text-primary: #1A2A2F;
        --text-secondary: #4B5E63;
        --text-muted: #7A8C90;
        --card-radius: 10px;
        --btn-radius: 6px;
        --badge-radius: 4px;
        --shadow-card: 0 2px 8px rgba(16, 33, 38, .06);
        --shadow-card-hover: 0 8px 24px rgba(16, 33, 38, .12);
        --font-title: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
        --font-body: "Noto Sans SC", "Source Han Sans SC", "Microsoft YaHei", sans-serif;
        --max-width: 1200px;
        --section-padding: 80px 0;
        --section-padding-mobile: 48px 0;
    }
    html {
        scroll-behavior: smooth;
        -webkit-text-size-adjust: 100%;
        box-sizing: border-box;
    }
    *,
    *::before,
    *::after {
        box-sizing: inherit;
    }
    body {
        font-family: var(--font-body);
        font-size: 16px;
        line-height: 1.75;
        color: var(--text-primary);
        background-color: var(--ice-mist);
        -webkit-font-smoothing: antialiased;
        -moz-osx-font-smoothing: grayscale;
        margin: 0;
        padding: 0;
    }
    img {
        max-width: 100%;
        height: auto;
        display: block;
        border: 0;
    }
    a {
        text-decoration: none;
        color: inherit;
        transition: color .2s ease, background-color .2s ease, border-color .2s ease, transform .2s ease, box-shadow .2s ease;
    }
    a:focus-visible,
    button:focus-visible,
    input:focus-visible,
    textarea:focus-visible,
    select:focus-visible {
        outline: 2px solid var(--ice-blue);
        outline-offset: 2px;
    }
    button,
    input,
    textarea,
    select {
        font-family: var(--font-body);
        font-size: 16px;
    }
    .container {
        max-width: var(--max-width);
        margin: 0 auto;
        padding-left: 24px;
        padding-right: 24px;
    }
    .section {
        padding: var(--section-padding);
    }
    .section--dark {
        background-color: var(--polar-dark);
        color: #F5F9FA;
    }
    .section--snow {
        background-color: var(--snow-ice);
    }
    .section--light {
        background-color: #fff;
    }
    .section--mist {
        background-color: var(--ice-mist);
    }
    .section__heading {
        font-family: var(--font-title);
        font-size: clamp(26px, 4vw, 34px);
        font-weight: 700;
        line-height: 1.35;
        letter-spacing: .015em;
        color: var(--text-primary);
        margin-bottom: 16px;
    }
    .section__heading--white {
        color: #fff;
    }
    .section__subheading {
        font-size: 16px;
        line-height: 1.7;
        color: var(--text-secondary);
        max-width: 720px;
        margin-bottom: 40px;
    }
    .section__subheading--white {
        color: var(--snow-ice);
    }
    .section__label {
        display: inline-block;
        font-size: 13px;
        font-weight: 600;
        color: var(--accent-orange);
        letter-spacing: .06em;
        text-transform: uppercase;
        margin-bottom: 12px;
    }
    .section__label--ice {
        color: var(--ice-blue);
    }
    .text-center {
        text-align: center;
    }
    .mb-0 {
        margin-bottom: 0;
    }
    .mt-0 {
        margin-top: 0;
    }

    /* Navigation */
    .site-header {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        z-index: 999;
        transition: background-color .3s ease, box-shadow .3s ease, border-color .3s ease, backdrop-filter .3s ease;
        background: rgba(16, 33, 38, .85);
        backdrop-filter: blur(12px);
        -webkit-backdrop-filter: blur(12px);
        border-bottom: 1px solid rgba(255, 255, 255, .2);
        box-shadow: 0 1px 0 rgba(255, 255, 255, .15) inset;
    }
    .site-header.is-scrolled {
        background: #102126;
        box-shadow: 0 4px 16px rgba(0, 0, 0, .2);
        border-bottom: 1px solid var(--ice-blue);
    }
    .site-header .nav-container {
        display: flex;
        align-items: center;
        justify-content: space-between;
        min-height: 64px;
        gap: 16px;
        flex-wrap: nowrap;
    }
    .nav-logo {
        display: flex;
        align-items: center;
        gap: 10px;
        flex-shrink: 0;
    }
    .nav-logo__icon {
        width: 36px;
        height: 36px;
        border-radius: 50%;
        background: linear-gradient(135deg, var(--ice-blue), var(--snow-ice));
        display: flex;
        align-items: center;
        justify-content: center;
        flex-shrink: 0;
    }
    .nav-logo__icon i {
        color: var(--polar-dark);
        font-size: 18px;
    }
    .nav-logo__text {
        font-family: var(--font-title);
        font-size: 19px;
        font-weight: 700;
        color: #F5F9FA;
        letter-spacing: .02em;
        white-space: nowrap;
    }
    .nav-links {
        display: flex;
        align-items: center;
        gap: 2px;
        flex-shrink: 1;
        overflow-x: auto;
        scrollbar-width: none;
        -ms-overflow-style: none;
    }
    .nav-links::-webkit-scrollbar {
        display: none;
    }
    .nav-links a {
        display: inline-block;
        padding: 8px 12px;
        font-size: 14.5px;
        font-weight: 500;
        color: #F5F9FA;
        position: relative;
        white-space: nowrap;
        letter-spacing: .01em;
        flex-shrink: 0;
    }
    .nav-links a:hover {
        color: var(--ice-blue);
    }
    .nav-links a.active::after {
        content: '';
        position: absolute;
        bottom: 2px;
        left: 12px;
        right: 12px;
        height: 2px;
        background-color: var(--accent-orange);
        border-radius: 1px;
    }
    .nav-links a.active {
        color: #fff;
    }
    .nav-actions {
        display: flex;
        align-items: center;
        gap: 10px;
        flex-shrink: 0;
    }
    .nav-search-icon {
        width: 36px;
        height: 36px;
        border-radius: 50%;
        border: 1.5px solid rgba(255, 255, 255, .4);
        background: transparent;
        display: flex;
        align-items: center;
        justify-content: center;
        cursor: pointer;
        color: #F5F9FA;
        transition: all .2s ease;
        font-size: 14px;
    }
    .nav-search-icon:hover {
        border-color: var(--ice-blue);
        color: var(--ice-blue);
        background: rgba(255, 255, 255, .05);
    }
    .nav-cta {
        display: inline-flex;
        align-items: center;
        gap: 6px;
        padding: 9px 18px;
        background-color: var(--accent-orange);
        color: #fff;
        font-size: 14px;
        font-weight: 600;
        border-radius: var(--btn-radius);
        white-space: nowrap;
        transition: background-color .2s ease, transform .2s ease;
    }
    .nav-cta:hover {
        background-color: var(--accent-orange-hover);
        transform: translateY(-1px);
        color: #fff;
    }
    .nav-hamburger {
        display: none;
        width: 40px;
        height: 40px;
        background: transparent;
        border: 1.5px solid rgba(255, 255, 255, .4);
        border-radius: 6px;
        cursor: pointer;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        gap: 5px;
        color: #F5F9FA;
        flex-shrink: 0;
        padding: 0;
    }
    .nav-hamburger span {
        display: block;
        width: 20px;
        height: 2px;
        background-color: currentColor;
        border-radius: 2px;
        transition: all .3s ease;
    }
    .nav-hamburger.is-open span:nth-child(1) {
        transform: translateY(7px) rotate(45deg);
    }
    .nav-hamburger.is-open span:nth-child(2) {
        opacity: 0;
    }
    .nav-hamburger.is-open span:nth-child(3) {
        transform: translateY(-7px) rotate(-45deg);
    }
    .mobile-menu {
        display: none;
        background: #102126;
        border-top: 1px solid rgba(255, 255, 255, .1);
        padding: 12px 0 20px;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        z-index: 998;
        box-shadow: 0 16px 32px rgba(0, 0, 0, .2);
    }
    .mobile-menu.is-visible {
        display: block;
    }
    .mobile-menu a {
        display: block;
        padding: 12px 24px;
        font-size: 16px;
        color: #F5F9FA;
        border-bottom: 1px solid rgba(255, 255, 255, .08);
        transition: background-color .2s ease, color .2s ease;
    }
    .mobile-menu a:hover {
        background: rgba(255, 255, 255, .05);
        color: var(--ice-blue);
    }
    .mobile-menu a.active {
        color: var(--accent-orange);
        font-weight: 600;
    }
    .mobile-menu a:last-child {
        border-bottom: none;
    }

    /* Breadcrumb */
    .breadcrumb-section {
        padding: 96px 0 0;
        background: var(--polar-dark);
    }
    .breadcrumb-nav {
        display: flex;
        align-items: center;
        gap: 8px;
        font-size: 13.5px;
        color: var(--text-muted);
        padding: 14px 0;
        flex-wrap: wrap;
    }
    .breadcrumb-nav a {
        color: var(--ice-blue);
        transition: color .2s ease;
    }
    .breadcrumb-nav a:hover {
        color: #fff;
    }
    .breadcrumb-nav .separator {
        color: var(--text-muted);
    }
    .breadcrumb-nav .current {
        color: #fff;
        font-weight: 500;
    }

    /* Hero */
    .hero-subpage {
        position: relative;
        background: var(--polar-dark);
        overflow: hidden;
        padding: 48px 0 80px;
    }
    .hero-subpage::before {
        content: '';
        position: absolute;
        inset: 0;
        background: linear-gradient(135deg, rgba(16, 33, 38, .9) 0%, rgba(16, 33, 38, .65) 55%, rgba(255, 90, 38, .2) 100%);
        z-index: 1;
    }
    .hero-subpage__bg {
        position: absolute;
        inset: 0;
        background-image: url('/assets/images/backpic/back-2.webp');
        background-size: cover;
        background-position: center;
        z-index: 0;
    }
    .hero-subpage .container {
        position: relative;
        z-index: 2;
    }
    .hero-subpage__content {
        max-width: 720px;
        padding-top: 24px;
    }
    .hero-subpage h1 {
        font-family: var(--font-title);
        font-size: clamp(28px, 5vw, 40px);
        font-weight: 700;
        line-height: 1.3;
        color: #fff;
        margin: 0 0 16px;
        letter-spacing: .015em;
    }
    .hero-subpage__subtitle {
        font-size: 17px;
        line-height: 1.6;
        color: var(--snow-ice);
        margin-bottom: 28px;
        max-width: 620px;
    }
    .hero-subpage__actions {
        display: flex;
        gap: 12px;
        flex-wrap: wrap;
    }
    .btn {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        gap: 8px;
        padding: 12px 24px;
        font-size: 15px;
        font-weight: 600;
        border-radius: var(--btn-radius);
        border: 1.5px solid transparent;
        cursor: pointer;
        transition: all .2s ease;
        text-align: center;
        line-height: 1.4;
    }
    .btn-primary {
        background-color: var(--accent-orange);
        color: #fff;
        border-color: var(--accent-orange);
    }
    .btn-primary:hover {
        background-color: var(--accent-orange-hover);
        border-color: var(--accent-orange-hover);
        transform: translateY(-2px);
        box-shadow: 0 4px 12px rgba(255, 90, 38, .25);
        color: #fff;
    }
    .btn-outline-white {
        background: transparent;
        color: #fff;
        border-color: rgba(255, 255, 255, .6);
    }
    .btn-outline-white:hover {
        background: #fff;
        color: var(--polar-dark);
        border-color: #fff;
        transform: translateY(-2px);
    }
    .btn-outline-dark {
        background: transparent;
        color: var(--polar-dark);
        border-color: var(--polar-dark);
    }
    .btn-outline-dark:hover {
        background: var(--polar-dark);
        color: #fff;
        border-color: var(--polar-dark);
        transform: translateY(-2px);
    }
    .btn-sm {
        padding: 8px 16px;
        font-size: 13.5px;
    }
    .btn-lg {
        padding: 14px 32px;
        font-size: 16px;
    }

    /* Data Panel Cards */
    .data-panel-section {
        padding: 0 0 60px;
        background: var(--polar-dark);
        margin-top: -10px;
    }
    .data-panel-grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 20px;
        position: relative;
        z-index: 3;
        margin-top: -50px;
    }
    .data-panel-card {
        background: #fff;
        border-radius: var(--card-radius);
        padding: 28px 24px;
        text-align: center;
        box-shadow: var(--shadow-card-hover);
        border: 1px solid var(--line-border);
        transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
    }
    .data-panel-card:hover {
        transform: translateY(-4px);
        box-shadow: 0 12px 28px rgba(16, 33, 38, .16);
        border-color: var(--ice-blue);
    }
    .data-panel-card__number {
        font-family: var(--font-title);
        font-size: 38px;
        font-weight: 700;
        color: var(--accent-orange);
        line-height: 1.2;
        margin-bottom: 8px;
        letter-spacing: .01em;
    }
    .data-panel-card__unit {
        font-size: 18px;
        font-weight: 600;
        color: var(--accent-orange);
    }
    .data-panel-card__label {
        font-size: 14px;
        color: var(--text-secondary);
        margin-top: 4px;
        line-height: 1.5;
    }
    .data-panel-card__icon {
        font-size: 28px;
        color: var(--ice-blue);
        margin-bottom: 12px;
        display: block;
    }

    /* Content Section */
    .content-section {
        background: #fff;
        padding: 60px 0;
    }
    .content-section__body {
        max-width: 780px;
        margin: 0 auto;
        font-size: 16px;
        line-height: 1.85;
        color: var(--text-secondary);
    }
    .content-section__body p {
        margin-bottom: 20px;
    }
    .content-section__body h2 {
        font-family: var(--font-title);
        font-size: 24px;
        font-weight: 700;
        color: var(--text-primary);
        margin: 32px 0 16px;
        line-height: 1.4;
    }
    .content-section__body h3 {
        font-family: var(--font-title);
        font-size: 18px;
        font-weight: 600;
        color: var(--text-primary);
        margin: 24px 0 12px;
        line-height: 1.45;
    }
    .content-section__body ul,
    .content-section__body ol {
        padding-left: 24px;
        margin-bottom: 20px;
    }
    .content-section__body li {
        margin-bottom: 8px;
    }
    .content-section__body strong {
        color: var(--text-primary);
        font-weight: 600;
    }
    .content-section__body blockquote {
        border-left: 3px solid var(--accent-orange);
        background: var(--ice-mist);
        padding: 16px 20px;
        margin: 24px 0;
        border-radius: 0 6px 6px 0;
        font-style: normal;
        color: var(--text-primary);
        font-size: 15.5px;
        line-height: 1.7;
    }

    /* Chart Placeholder */
    .chart-section {
        background: var(--ice-mist);
        padding: 60px 0;
    }
    .chart-panel {
        background: #fff;
        border-radius: var(--card-radius);
        border: 1px solid var(--line-border);
        box-shadow: var(--shadow-card);
        padding: 32px 28px;
        margin-top: 32px;
    }
    .chart-panel__header {
        display: flex;
        align-items: center;
        justify-content: space-between;
        margin-bottom: 24px;
        flex-wrap: wrap;
        gap: 12px;
    }
    .chart-panel__title {
        font-family: var(--font-title);
        font-size: 18px;
        font-weight: 600;
        color: var(--text-primary);
    }
    .chart-panel__legend {
        display: flex;
        gap: 16px;
        flex-wrap: wrap;
        font-size: 13px;
        color: var(--text-muted);
        align-items: center;
    }
    .chart-legend-dot {
        display: inline-block;
        width: 10px;
        height: 10px;
        border-radius: 50%;
        margin-right: 5px;
    }
    .chart-legend-dot--orange {
        background: var(--accent-orange);
    }
    .chart-legend-dot--ice {
        background: var(--ice-blue);
    }
    .chart-legend-dot--dark {
        background: var(--polar-dark);
    }
    .chart-bars {
        display: flex;
        align-items: flex-end;
        gap: 12px;
        height: 280px;
        padding-top: 20px;
        border-bottom: 1px solid var(--line-border);
        position: relative;
    }
    .chart-bars::before {
        content: '';
        position: absolute;
        left: 0;
        right: 0;
        top: 20px;
        border-top: 1px dashed var(--line-border);
    }
    .chart-bar-group {
        flex: 1;
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: flex-end;
        height: 100%;
        gap: 8px;
    }
    .chart-bar {
        width: 100%;
        max-width: 48px;
        border-radius: 4px 4px 0 0;
        background: var(--accent-orange);
        min-height: 16px;
        transition: height .6s ease, opacity .4s ease;
        position: relative;
    }
    .chart-bar:hover {
        opacity: .85;
    }
    .chart-bar--ice {
        background: var(--ice-blue);
    }
    .chart-bar--dark {
        background: var(--polar-dark);
    }
    .chart-bar__value {
        font-size: 12px;
        color: var(--text-secondary);
        font-weight: 600;
    }
    .chart-bar__label {
        font-size: 12px;
        color: var(--text-muted);
        white-space: nowrap;
    }
    .chart-bar__tooltip {
        position: absolute;
        top: -28px;
        left: 50%;
        transform: translateX(-50%);
        background: var(--polar-dark);
        color: #fff;
        padding: 3px 8px;
        border-radius: 4px;
        font-size: 11px;
        opacity: 0;
        pointer-events: none;
        transition: opacity .2s ease;
        white-space: nowrap;
    }
    .chart-bar:hover .chart-bar__tooltip {
        opacity: 1;
    }

    /* Capability Grid */
    .capability-section {
        background: #fff;
        padding: 60px 0;
    }
    .capability-grid {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: 24px;
        margin-top: 40px;
    }
    .capability-card {
        background: var(--ice-mist);
        border-radius: var(--card-radius);
        border: 1px solid var(--line-border);
        padding: 28px 24px;
        transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
        display: flex;
        gap: 16px;
        align-items: flex-start;
    }
    .capability-card:hover {
        transform: translateY(-4px);
        box-shadow: var(--shadow-card-hover);
        border-color: var(--ice-blue);
    }
    .capability-card__icon {
        width: 48px;
        height: 48px;
        border-radius: 50%;
        background: linear-gradient(135deg, var(--ice-blue), var(--snow-ice));
        display: flex;
        align-items: center;
        justify-content: center;
        flex-shrink: 0;
        font-size: 20px;
        color: var(--polar-dark);
    }
    .capability-card__content h3 {
        font-family: var(--font-title);
        font-size: 17px;
        font-weight: 600;
        color: var(--text-primary);
        margin: 0 0 8px;
        line-height: 1.4;
    }
    .capability-card__content p {
        font-size: 14.5px;
        line-height: 1.7;
        color: var(--text-secondary);
        margin: 0;
    }

    /* Scenario Section */
    .scenario-section {
        background: var(--snow-ice);
        padding: 60px 0;
    }
    .scenario-list {
        list-style: none;
        padding: 0;
        margin: 32px 0 0;
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: 16px;
    }
    .scenario-list li {
        background: #fff;
        border-radius: 8px;
        padding: 16px 18px;
        display: flex;
        align-items: flex-start;
        gap: 12px;
        border: 1px solid var(--line-border);
        font-size: 14.5px;
        line-height: 1.65;
        color: var(--text-secondary);
        transition: border-color .2s ease, box-shadow .2s ease;
    }
    .scenario-list li:hover {
        border-color: var(--ice-blue);
        box-shadow: var(--shadow-card);
    }
    .scenario-list li i {
        color: var(--accent-orange);
        font-size: 16px;
        margin-top: 3px;
        flex-shrink: 0;
    }
    .scenario-list li strong {
        color: var(--text-primary);
        font-weight: 600;
    }

    /* Process Steps */
    .process-section {
        background: #fff;
        padding: 60px 0;
    }
    .process-steps {
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        gap: 20px;
        margin-top: 40px;
    }
    .process-step {
        text-align: center;
        padding: 20px 16px;
        background: var(--ice-mist);
        border-radius: var(--card-radius);
        border: 1px solid var(--line-border);
        transition: border-color .2s ease, transform .2s ease;
    }
    .process-step:hover {
        border-color: var(--ice-blue);
        transform: translateY(-3px);
    }
    .process-step__number {
        font-family: var(--font-title);
        font-size: 32px;
        font-weight: 700;
        color: var(--ice-blue);
        line-height: 1.2;
        margin-bottom: 8px;
        letter-spacing: .02em;
    }
    .process-step__title {
        font-family: var(--font-title);
        font-size: 15.5px;
        font-weight: 600;
        color: var(--text-primary);
        margin-bottom: 6px;
    }
    .process-step__desc {
        font-size: 13.5px;
        color: var(--text-secondary);
        line-height: 1.6;
    }

    /* FAQ */
    .faq-section {
        background: var(--ice-mist);
        padding: 60px 0;
    }
    .faq-list {
        max-width: 780px;
        margin: 40px auto 0;
    }
    .faq-item {
        background: #fff;
        border: 1px solid var(--line-border);
        border-radius: 10px;
        margin-bottom: 12px;
        overflow: hidden;
        transition: border-color .2s ease, box-shadow .2s ease;
    }
    .faq-item.is-active {
        border-color: var(--ice-blue);
        box-shadow: var(--shadow-card);
    }
    .faq-item__question {
        width: 100%;
        background: transparent;
        border: none;
        padding: 18px 20px;
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 12px;
        cursor: pointer;
        text-align: left;
        font-family: var(--font-title);
        font-size: 15.5px;
        font-weight: 600;
        color: var(--text-primary);
        transition: background-color .2s ease;
    }
    .faq-item__question:hover {
        background: var(--ice-mist);
    }
    .faq-item.is-active .faq-item__question {
        background: var(--snow-ice);
    }
    .faq-item__arrow {
        flex-shrink: 0;
        color: var(--accent-orange);
        font-size: 14px;
        transition: transform .3s ease;
    }
    .faq-item.is-active .faq-item__arrow {
        transform: rotate(180deg);
    }
    .faq-item__answer {
        max-height: 0;
        overflow: hidden;
        transition: max-height .35s ease, padding .3s ease;
        padding: 0 20px;
        font-size: 14.5px;
        line-height: 1.7;
        color: var(--text-secondary);
    }
    .faq-item.is-active .faq-item__answer {
        max-height: 300px;
        padding: 0 20px 18px;
    }

    /* Related */
    .related-section {
        background: #fff;
        padding: 60px 0;
    }
    .related-grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 20px;
        margin-top: 32px;
    }
    .related-card {
        background: var(--ice-mist);
        border-radius: var(--card-radius);
        border: 1px solid var(--line-border);
        overflow: hidden;
        transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
        display: flex;
        flex-direction: column;
    }
    .related-card:hover {
        transform: translateY(-4px);
        box-shadow: var(--shadow-card-hover);
        border-color: var(--ice-blue);
    }
    .related-card__img {
        width: 100%;
        height: 180px;
        object-fit: cover;
        background-color: var(--snow-ice);
    }
    .related-card__body {
        padding: 20px;
        flex: 1;
        display: flex;
        flex-direction: column;
    }
    .related-card__tag {
        display: inline-block;
        font-size: 12px;
        font-weight: 600;
        color: var(--accent-orange);
        background: rgba(255, 90, 38, .08);
        padding: 3px 10px;
        border-radius: var(--badge-radius);
        margin-bottom: 10px;
        align-self: flex-start;
    }
    .related-card__title {
        font-family: var(--font-title);
        font-size: 17px;
        font-weight: 600;
        color: var(--text-primary);
        margin-bottom: 8px;
        line-height: 1.4;
        transition: color .2s ease;
    }
    .related-card:hover .related-card__title {
        color: var(--accent-orange);
    }
    .related-card__desc {
        font-size: 14px;
        line-height: 1.65;
        color: var(--text-secondary);
        margin-bottom: 16px;
        flex: 1;
    }
    .related-card__link {
        font-size: 14px;
        font-weight: 600;
        color: var(--accent-orange);
        display: inline-flex;
        align-items: center;
        gap: 4px;
        transition: gap .2s ease;
    }
    .related-card__link:hover {
        gap: 8px;
    }

    /* Pagination */
    .pagination-row {
        display: flex;
        justify-content: center;
        align-items: center;
        gap: 8px;
        margin-top: 32px;
        flex-wrap: wrap;
    }
    .pagination-btn {
        min-width: 38px;
        height: 38px;
        display: inline-flex;
        align-items: center;
        justify-content: center;
        border-radius: 6px;
        border: 1px solid var(--line-border);
        background: #fff;
        color: var(--text-secondary);
        font-size: 14px;
        font-weight: 500;
        cursor: pointer;
        transition: all .2s ease;
        padding: 0 10px;
    }
    .pagination-btn:hover {
        border-color: var(--ice-blue);
        color: var(--accent-orange);
        background: var(--ice-mist);
    }
    .pagination-btn.is-active {
        background: var(--polar-dark);
        color: #fff;
        border-color: var(--polar-dark);
    }
    .pagination-btn.is-disabled {
        opacity: .4;
        pointer-events: none;
    }

    /* CTA */
    .cta-section {
        background: linear-gradient(135deg, var(--polar-dark) 0%, #1d3a42 60%, rgba(255, 90, 38, .15) 100%);
        padding: 70px 0;
        color: #fff;
        text-align: center;
    }
    .cta-section__heading {
        font-family: var(--font-title);
        font-size: clamp(24px, 4vw, 32px);
        font-weight: 700;
        line-height: 1.35;
        color: #fff;
        margin-bottom: 14px;
    }
    .cta-section__desc {
        font-size: 16px;
        line-height: 1.7;
        color: var(--snow-ice);
        max-width: 620px;
        margin: 0 auto 28px;
    }
    .cta-section__actions {
        display: flex;
        gap: 14px;
        justify-content: center;
        flex-wrap: wrap;
    }
    .cta-section .btn-outline-white {
        color: #fff;
        border-color: rgba(255, 255, 255, .6);
    }
    .cta-section .btn-outline-white:hover {
        background: #fff;
        color: var(--polar-dark);
    }

    /* Footer */
    .site-footer {
        background: var(--polar-dark);
        color: #c8d7db;
        padding: 56px 0 28px;
        border-top: 1px solid rgba(255, 255, 255, .06);
    }
    .footer-grid {
        display: grid;
        grid-template-columns: 2fr 1fr 1fr 1fr;
        gap: 32px;
        margin-bottom: 40px;
    }
    .footer-brand__name {
        font-family: var(--font-title);
        font-size: 22px;
        font-weight: 700;
        color: #fff;
        margin-bottom: 10px;
    }
    .footer-brand__desc {
        font-size: 14px;
        line-height: 1.7;
        color: #a4b8bd;
        max-width: 320px;
        margin: 0;
    }
    .footer-col h4 {
        font-family: var(--font-title);
        font-size: 15px;
        font-weight: 600;
        color: #fff;
        margin: 0 0 14px;
    }
    .footer-col a {
        display: block;
        font-size: 14px;
        color: #a4b8bd;
        padding: 5px 0;
        transition: color .2s ease, padding-left .2s ease;
    }
    .footer-col a:hover {
        color: var(--ice-blue);
        padding-left: 4px;
    }
    .footer-bottom {
        border-top: 1px solid rgba(255, 255, 255, .08);
        padding-top: 20px;
        display: flex;
        justify-content: space-between;
        align-items: center;
        gap: 16px;
        flex-wrap: wrap;
        font-size: 13px;
        color: #8da2a8;
    }
    .footer-bottom__legal {
        display: flex;
        align-items: center;
        gap: 8px;
        flex-wrap: wrap;
    }
    .footer-bottom__legal a {
        color: #a4b8bd;
    }
    .footer-bottom__legal a:hover {
        color: var(--ice-blue);
    }
    .footer-bottom__icp {
        display: flex;
        gap: 16px;
        flex-wrap: wrap;
        color: #8da2a8;
    }
    .footer-bottom__icp span {
        white-space: nowrap;
    }

    /* Responsive */
    @media (max-width: 1024px) {
        .section {
            padding: 56px 0;
        }
        .data-panel-grid {
            grid-template-columns: repeat(3, 1fr);
            gap: 14px;
        }
        .data-panel-card__number {
            font-size: 30px;
        }
        .process-steps {
            grid-template-columns: repeat(2, 1fr);
            gap: 14px;
        }
        .footer-grid {
            grid-template-columns: 1.5fr 1fr 1fr;
            gap: 24px;
        }
    }
    @media (max-width: 768px) {
        .section {
            padding: 48px 0;
        }
        .container {
            padding-left: 16px;
            padding-right: 16px;
        }
        .nav-links {
            display: none;
        }
        .nav-hamburger {
            display: flex;
        }
        .nav-cta {
            display: none;
        }
        .mobile-menu {
            display: none;
        }
        .mobile-menu.is-visible {
            display: block;
        }
        .data-panel-grid {
            grid-template-columns: 1fr;
            gap: 12px;
            margin-top: -30px;
        }
        .data-panel-card__number {
            font-size: 28px;
        }
        .capability-grid {
            grid-template-columns: 1fr;
            gap: 14px;
        }
        .scenario-list {
            grid-template-columns: 1fr;
            gap: 10px;
        }
        .process-steps {
            grid-template-columns: 1fr;
            gap: 12px;
        }
        .related-grid {
            grid-template-columns: 1fr;
            gap: 14px;
        }
        .chart-bars {
            height: 200px;
            gap: 6px;
        }
        .footer-grid {
            grid-template-columns: 1fr;
            gap: 20px;
        }
        .footer-bottom {
            flex-direction: column;
            align-items: flex-start;
            gap: 12px;
        }
        .hero-subpage {
            padding: 32px 0 56px;
        }
        .breadcrumb-section {
            padding: 84px 0 0;
        }
        .chart-panel {
            padding: 20px 16px;
        }
    }
    @media (max-width: 520px) {
        .hero-subpage h1 {
            font-size: 26px;
        }
        .hero-subpage__subtitle {
            font-size: 15px;
        }
        .btn {
            padding: 10px 18px;
            font-size: 14px;
            width: 100%;
            justify-content: center;
        }
        .hero-subpage__actions {
            flex-direction: column;
        }
        .data-panel-card {
            padding: 20px 16px;
        }
        .data-panel-card__number {
            font-size: 26px;
        }
        .capability-card {
            flex-direction: column;
            gap: 10px;
        }
        .capability-card__icon {
            width: 40px;
            height: 40px;
            font-size: 17px;
        }
        .chart-panel__header {
            flex-direction: column;
            align-items: flex-start;
        }
        .cta-section {
            padding: 48px 0;
        }
        .cta-section__actions {
            flex-direction: column;
        }
    }

/* roulang page: category6 */
:root {
            --polar-dark: #102126;
            --ice-blue: #9FD7E5;
            --accent-orange: #FF5A26;
            --accent-orange-hover: #E64A18;
            --snow-ice: #D8EFF3;
            --ice-mist: #F5F9FA;
            --line-border: #E5EDEF;
            --text-primary: #1A2A2F;
            --text-secondary: #4B5E63;
            --text-muted: #7A8C90;
            --card-radius: 10px;
            --btn-radius: 6px;
            --badge-radius: 4px;
            --shadow-card: 0 2px 8px rgba(16, 33, 38, .06);
            --shadow-card-hover: 0 8px 24px rgba(16, 33, 38, .12);
            --font-title: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
            --font-body: "Noto Sans SC", "Source Han Sans SC", "Microsoft YaHei", sans-serif;
            --max-width: 1200px;
            --section-padding: 80px 0;
            --section-padding-mobile: 48px 0;
        }

        * {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: var(--font-body);
            font-size: 16px;
            line-height: 1.75;
            color: var(--text-primary);
            background-color: var(--ice-mist);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            margin: 0;
            padding: 0;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border: 0;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: color .2s ease, background-color .2s ease, border-color .2s ease;
        }

        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        textarea:focus-visible,
        select:focus-visible {
            outline: 2px solid var(--ice-blue);
            outline-offset: 2px;
        }

        button,
        input,
        textarea,
        select {
            font-family: var(--font-body);
            font-size: 16px;
        }

        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        .section {
            padding: var(--section-padding);
        }

        .section--dark {
            background-color: var(--polar-dark);
            color: #F5F9FA;
        }

        .section--snow {
            background-color: var(--snow-ice);
        }

        .section--light {
            background-color: #fff;
        }

        .section__heading {
            font-family: var(--font-title);
            font-size: clamp(26px, 4vw, 34px);
            font-weight: 700;
            line-height: 1.35;
            letter-spacing: .015em;
            color: var(--text-primary);
            margin-bottom: 16px;
        }

        .section__heading--white {
            color: #fff;
        }

        .section__subheading {
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-secondary);
            max-width: 720px;
            margin-bottom: 40px;
        }

        .section__subheading--white {
            color: var(--snow-ice);
        }

        .section__label {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            color: var(--accent-orange);
            letter-spacing: .06em;
            text-transform: uppercase;
            margin-bottom: 12px;
        }

        .section__label--ice {
            color: var(--ice-blue);
        }

        /* Navigation */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 999;
            transition: background-color .3s ease, box-shadow .3s ease, backdrop-filter .3s ease;
            background: rgba(16, 33, 38, .35);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(255, 255, 255, .2);
            box-shadow: 0 1px 0 rgba(255, 255, 255, .15) inset;
        }

        .site-header.is-scrolled {
            background: #102126;
            box-shadow: 0 4px 16px rgba(0, 0, 0, .2);
            border-bottom: 1px solid var(--ice-blue);
        }

        .site-header .nav-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            min-height: 64px;
            gap: 16px;
        }

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }

        .nav-logo__icon {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--ice-blue), var(--snow-ice));
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
        }

        .nav-logo__icon i {
            color: var(--polar-dark);
            font-size: 18px;
        }

        .nav-logo__text {
            font-family: var(--font-title);
            font-size: 19px;
            font-weight: 700;
            color: #F5F9FA;
            letter-spacing: .02em;
            white-space: nowrap;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 4px;
        }

        .nav-links a {
            display: inline-block;
            padding: 8px 12px;
            font-size: 14.5px;
            font-weight: 500;
            color: #F5F9FA;
            position: relative;
            white-space: nowrap;
            letter-spacing: .01em;
        }

        .nav-links a:hover {
            color: var(--ice-blue);
        }

        .nav-links a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 12px;
            right: 12px;
            height: 2px;
            background-color: var(--accent-orange);
            border-radius: 1px;
        }

        .nav-links a.active {
            color: #fff;
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }

        .nav-search-icon {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #F5F9FA;
            cursor: pointer;
            transition: background-color .2s ease;
            background: rgba(255, 255, 255, .1);
        }

        .nav-search-icon:hover {
            background: rgba(255, 255, 255, .2);
        }

        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--accent-orange);
            color: #fff;
            padding: 10px 18px;
            border-radius: var(--btn-radius);
            font-size: 14px;
            font-weight: 600;
            transition: background-color .2s ease, transform .2s ease;
            white-space: nowrap;
        }

        .nav-cta:hover {
            background: var(--accent-orange-hover);
            color: #fff;
            transform: translateY(-2px);
        }

        .nav-toggle {
            display: none;
            background: none;
            border: none;
            color: #F5F9FA;
            font-size: 24px;
            cursor: pointer;
            padding: 8px;
        }

        /* Hero */
        .hero {
            position: relative;
            min-height: 380px;
            display: flex;
            align-items: center;
            background-color: var(--polar-dark);
            overflow: hidden;
        }

        .hero__bg {
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-3.webp');
            background-size: cover;
            background-position: center;
            opacity: .25;
        }

        .hero__overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(16, 33, 38, .88) 0%, rgba(16, 33, 38, .65) 60%, rgba(255, 90, 38, .18) 100%);
        }

        .hero__content {
            position: relative;
            z-index: 2;
            padding: 120px 0 80px;
            width: 100%;
        }

        .hero__breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--snow-ice);
            margin-bottom: 20px;
            flex-wrap: wrap;
        }

        .hero__breadcrumb a {
            color: var(--ice-blue);
            transition: color .2s ease;
        }

        .hero__breadcrumb a:hover {
            color: #fff;
        }

        .hero__breadcrumb span {
            color: var(--text-muted);
        }

        .hero__title {
            font-family: var(--font-title);
            font-size: clamp(30px, 5vw, 44px);
            font-weight: 700;
            color: #fff;
            line-height: 1.35;
            letter-spacing: .015em;
            margin-bottom: 16px;
        }

        .hero__subtitle {
            font-size: 17px;
            color: var(--snow-ice);
            line-height: 1.8;
            max-width: 680px;
        }

        /* Resource layout */
        .resource-layout {
            display: grid;
            grid-template-columns: 280px 1fr;
            gap: 32px;
            align-items: start;
        }

        .filter-panel {
            background: #fff;
            border: 1px solid var(--line-border);
            border-radius: var(--card-radius);
            padding: 24px 20px;
            box-shadow: var(--shadow-card);
            position: sticky;
            top: 100px;
        }

        .filter-panel__title {
            font-family: var(--font-title);
            font-size: 17px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 16px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .filter-panel__title i {
            color: var(--accent-orange);
            font-size: 16px;
        }

        .filter-group {
            margin-bottom: 20px;
        }

        .filter-group__label {
            font-size: 13px;
            font-weight: 600;
            color: var(--text-muted);
            text-transform: uppercase;
            letter-spacing: .05em;
            margin-bottom: 10px;
            display: block;
        }

        .filter-options {
            display: flex;
            flex-direction: column;
            gap: 6px;
        }

        .filter-options label {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--text-secondary);
            cursor: pointer;
            padding: 6px 8px;
            border-radius: 4px;
            transition: background-color .2s ease;
        }

        .filter-options label:hover {
            background-color: var(--ice-mist);
        }

        .filter-options input[type="radio"],
        .filter-options input[type="checkbox"] {
            accent-color: var(--accent-orange);
            width: 16px;
            height: 16px;
            cursor: pointer;
            flex-shrink: 0;
        }

        .filter-actions {
            display: flex;
            gap: 8px;
            margin-top: 12px;
        }

        .filter-actions button {
            flex: 1;
            padding: 10px 12px;
            border-radius: var(--btn-radius);
            font-size: 13px;
            font-weight: 600;
            cursor: pointer;
            transition: all .2s ease;
            border: none;
        }

        .filter-actions .btn-apply {
            background: var(--accent-orange);
            color: #fff;
        }

        .filter-actions .btn-apply:hover {
            background: var(--accent-orange-hover);
        }

        .filter-actions .btn-reset {
            background: transparent;
            border: 1px solid var(--line-border);
            color: var(--text-secondary);
        }

        .filter-actions .btn-reset:hover {
            background: var(--ice-mist);
        }

        .resource-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
        }

        .resource-card {
            background: #fff;
            border: 1px solid var(--line-border);
            border-radius: var(--card-radius);
            box-shadow: var(--shadow-card);
            padding: 24px;
            transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
            display: flex;
            flex-direction: column;
        }

        .resource-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-card-hover);
            border-color: var(--ice-blue);
        }

        .resource-card__icon {
            width: 48px;
            height: 48px;
            border-radius: 8px;
            background: var(--snow-ice);
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 16px;
            flex-shrink: 0;
        }

        .resource-card__icon i {
            font-size: 22px;
            color: var(--polar-dark);
        }

        .resource-card__icon--orange {
            background: rgba(255, 90, 38, .1);
        }
        .resource-card__icon--orange i {
            color: var(--accent-orange);
        }

        .resource-card__title {
            font-family: var(--font-title);
            font-size: 17px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 8px;
            line-height: 1.45;
        }

        .resource-card__desc {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 16px;
            flex-grow: 1;
        }

        .resource-card__meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 12px;
            color: var(--text-muted);
            margin-bottom: 16px;
            flex-wrap: wrap;
        }

        .resource-card__meta span {
            display: flex;
            align-items: center;
            gap: 4px;
        }

        .resource-card__actions {
            display: flex;
            align-items: center;
            gap: 10px;
            border-top: 1px solid var(--line-border);
            padding-top: 14px;
        }

        .btn-download {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--accent-orange);
            color: #fff;
            padding: 10px 18px;
            border-radius: var(--btn-radius);
            font-size: 13px;
            font-weight: 600;
            transition: background-color .2s ease, transform .2s ease;
            cursor: pointer;
            border: none;
        }

        .btn-download:hover {
            background: var(--accent-orange-hover);
            transform: translateY(-2px);
            color: #fff;
        }

        .btn-preview {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: var(--text-secondary);
            font-size: 13px;
            font-weight: 500;
            padding: 10px 14px;
            border-radius: var(--btn-radius);
            border: 1px solid var(--line-border);
            transition: all .2s ease;
            cursor: pointer;
            background: transparent;
        }

        .btn-preview:hover {
            background: var(--ice-mist);
            border-color: var(--ice-blue);
            color: var(--polar-dark);
        }

        .resource-card__tag {
            display: inline-block;
            padding: 3px 10px;
            font-size: 11px;
            font-weight: 600;
            border-radius: var(--badge-radius);
            background: var(--snow-ice);
            color: var(--polar-dark);
            letter-spacing: .03em;
        }

        /* Pagination */
        .pagination {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 6px;
            margin-top: 40px;
            flex-wrap: wrap;
        }

        .pagination a,
        .pagination span {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-width: 38px;
            height: 38px;
            padding: 0 12px;
            border-radius: var(--btn-radius);
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            border: 1px solid var(--line-border);
            background: #fff;
            transition: all .2s ease;
        }

        .pagination a:hover {
            background: var(--ice-mist);
            border-color: var(--ice-blue);
            color: var(--polar-dark);
        }

        .pagination .current {
            background: var(--polar-dark);
            color: #fff;
            border-color: var(--polar-dark);
            font-weight: 700;
        }

        .pagination .disabled {
            opacity: .5;
            pointer-events: none;
        }

        /* Stats */
        .stats-row {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            text-align: center;
        }

        .stat-item {
            padding: 24px 16px;
            background: rgba(255, 255, 255, .04);
            border: 1px solid rgba(159, 215, 229, .15);
            border-radius: var(--card-radius);
        }

        .stat-item__number {
            font-family: var(--font-title);
            font-size: 32px;
            font-weight: 700;
            color: var(--accent-orange);
            line-height: 1.3;
        }

        .stat-item__label {
            font-size: 13px;
            color: var(--text-muted);
            margin-top: 4px;
        }

        /* Related */
        .related-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
        }

        .related-card {
            display: flex;
            gap: 16px;
            background: #fff;
            border: 1px solid var(--line-border);
            border-radius: var(--card-radius);
            padding: 20px;
            box-shadow: var(--shadow-card);
            transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
        }

        .related-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-card-hover);
            border-color: var(--ice-blue);
        }

        .related-card__img {
            width: 100px;
            height: 100px;
            border-radius: 8px;
            object-fit: cover;
            flex-shrink: 0;
            background: var(--snow-ice);
        }

        .related-card__body {
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .related-card__title {
            font-family: var(--font-title);
            font-size: 15px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 6px;
            line-height: 1.5;
        }

        .related-card__desc {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.65;
            margin-bottom: 10px;
            flex-grow: 1;
        }

        .related-card__link {
            font-size: 13px;
            font-weight: 600;
            color: var(--accent-orange);
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }

        .related-card__link:hover {
            color: var(--accent-orange-hover);
        }

        /* CTA */
        .cta-box {
            background: var(--polar-dark);
            border-radius: var(--card-radius);
            padding: 48px 40px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .cta-box::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(159, 215, 229, .08), rgba(255, 90, 38, .12));
            pointer-events: none;
        }

        .cta-box > * {
            position: relative;
            z-index: 1;
        }

        .cta-box__title {
            font-family: var(--font-title);
            font-size: 24px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 12px;
            line-height: 1.4;
        }

        .cta-box__desc {
            font-size: 15px;
            color: var(--snow-ice);
            line-height: 1.75;
            max-width: 560px;
            margin: 0 auto 24px;
        }

        .cta-box__btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--accent-orange);
            color: #fff;
            padding: 14px 28px;
            border-radius: var(--btn-radius);
            font-size: 15px;
            font-weight: 700;
            transition: background-color .2s ease, transform .2s ease;
            border: none;
            cursor: pointer;
        }

        .cta-box__btn:hover {
            background: var(--accent-orange-hover);
            transform: translateY(-2px);
            color: #fff;
        }

        /* FAQ */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
        }

        .faq-item {
            background: #fff;
            border: 1px solid var(--line-border);
            border-radius: var(--card-radius);
            margin-bottom: 12px;
            overflow: hidden;
            transition: border-color .2s ease;
        }

        .faq-item.is-open {
            border-color: var(--ice-blue);
        }

        .faq-item__question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 18px 20px;
            cursor: pointer;
            font-family: var(--font-title);
            font-size: 15px;
            font-weight: 700;
            color: var(--text-primary);
            background: #fff;
            transition: background-color .2s ease;
            border: none;
            width: 100%;
            text-align: left;
        }

        .faq-item.is-open .faq-item__question {
            background: var(--snow-ice);
        }

        .faq-item__question:hover {
            background: var(--snow-ice);
        }

        .faq-item__arrow {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 13px;
            color: var(--text-muted);
            transition: transform .3s ease, color .2s ease;
        }

        .faq-item.is-open .faq-item__arrow {
            transform: rotate(180deg);
            color: var(--accent-orange);
        }

        .faq-item__answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height .35s ease;
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        .faq-item.is-open .faq-item__answer {
            max-height: 300px;
        }

        .faq-item__answer-inner {
            padding: 0 20px 18px;
        }

        /* Footer */
        .site-footer {
            background: var(--polar-dark);
            color: #F5F9FA;
            padding: 60px 0 30px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 32px;
            margin-bottom: 40px;
        }

        .footer-brand__name {
            font-family: var(--font-title);
            font-size: 22px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 12px;
        }

        .footer-brand__desc {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
            max-width: 320px;
            margin: 0;
        }

        .footer-col h4 {
            font-family: var(--font-title);
            font-size: 15px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 14px;
            letter-spacing: .02em;
        }

        .footer-col a {
            display: block;
            font-size: 13.5px;
            color: var(--text-muted);
            margin-bottom: 8px;
            transition: color .2s ease;
        }

        .footer-col a:hover {
            color: var(--ice-blue);
        }

        .footer-bottom {
            border-top: 1px solid rgba(159, 215, 229, .15);
            padding-top: 20px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 13px;
            color: var(--text-muted);
        }

        .footer-bottom__legal a {
            color: var(--text-muted);
            transition: color .2s ease;
        }

        .footer-bottom__legal a:hover {
            color: var(--ice-blue);
        }

        .footer-bottom__icp {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
            font-size: 12px;
        }

        /* Breadcrumb on page */
        .page-breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--text-muted);
            margin-bottom: 20px;
            flex-wrap: wrap;
        }

        .page-breadcrumb a {
            color: var(--text-secondary);
            transition: color .2s ease;
        }

        .page-breadcrumb a:hover {
            color: var(--accent-orange);
        }

        .page-breadcrumb span {
            color: var(--accent-orange);
            font-weight: 600;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .resource-layout {
                grid-template-columns: 1fr;
            }

            .filter-panel {
                position: static;
                display: flex;
                flex-wrap: wrap;
                gap: 16px;
                align-items: flex-start;
            }

            .filter-panel__title {
                width: 100%;
                margin-bottom: 0;
            }

            .filter-group {
                flex: 1;
                min-width: 160px;
                margin-bottom: 0;
            }

            .filter-actions {
                flex-direction: column;
                min-width: 100px;
                margin-top: 0;
            }

            .stats-row {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            .nav-toggle {
                display: block;
            }

            .nav-links {
                position: fixed;
                top: 64px;
                left: 0;
                right: 0;
                background: var(--polar-dark);
                flex-direction: column;
                align-items: stretch;
                gap: 0;
                padding: 16px 24px;
                border-bottom: 1px solid rgba(159, 215, 229, .2);
                display: none;
                z-index: 100;
                box-shadow: 0 12px 32px rgba(0, 0, 0, .25);
            }

            .nav-links.is-open {
                display: flex;
            }

            .nav-links a {
                padding: 14px 8px;
                font-size: 16px;
                border-bottom: 1px solid rgba(159, 215, 229, .1);
            }

            .nav-links a:last-child {
                border-bottom: none;
            }

            .nav-links a.active::after {
                display: none;
            }

            .nav-links a.active {
                color: var(--ice-blue);
            }

            .nav-cta {
                display: none;
            }

            .hero__content {
                padding: 100px 0 60px;
            }

            .resource-grid {
                grid-template-columns: 1fr;
            }

            .related-grid {
                grid-template-columns: 1fr;
            }

            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }

            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
            }

            .stats-row {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }

            .section {
                padding: var(--section-padding-mobile);
            }

            .hero__title {
                font-size: 26px;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }

            .stats-row {
                grid-template-columns: 1fr;
            }

            .cta-box {
                padding: 32px 20px;
            }

            .resource-card {
                padding: 18px;
            }

            .resource-card__actions {
                flex-direction: column;
                align-items: stretch;
                gap: 8px;
            }

            .btn-download,
            .btn-preview {
                justify-content: center;
                width: 100%;
            }

            .filter-panel {
                flex-direction: column;
                padding: 18px 16px;
            }

            .filter-group {
                width: 100%;
                min-width: auto;
            }
        }