/* roulang page: index */
:root {
            --brand: #3B82F6;
            --brand-dark: #2563EB;
            --brand-light: #DBEAFE;
            --brand-pale: #EFF6FF;
            --accent: #F04438;
            --accent-orange: #F97316;
            --surface-bg: #F8FAFC;
            --surface-white: #FFFFFF;
            --text-dark: #0F172A;
            --text-body: #334155;
            --text-mute: #64748B;
            --border: #E2E8F0;
            --radius-card: 16px;
            --radius-btn: 10px;
            --shadow-card: 0 4px 20px rgba(15, 23, 42, 0.06);
            --shadow-card-hover: 0 10px 30px rgba(15, 23, 42, 0.12);
            --shadow-nav: 0 2px 12px rgba(15, 23, 42, 0.08);
            --shadow-glass: 0 4px 24px rgba(15, 23, 42, 0.08);
            --container-max: 1200px;
            --section-pad: 80px;
            --section-pad-mobile: 48px;
        }

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

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: 'PingFang SC', 'Source Han Sans SC', 'Noto Sans SC', 'Microsoft YaHei', sans-serif;
            font-size: 16px;
            line-height: 1.75;
            color: var(--text-body);
            background-color: var(--surface-bg);
            overflow-x: hidden;
        }

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

        a {
            color: inherit;
            text-decoration: none;
            transition: color 0.25s ease;
        }

        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }

        button {
            cursor: pointer;
            border: none;
            background: none;
        }

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

        .section-pad {
            padding-top: var(--section-pad);
            padding-bottom: var(--section-pad);
        }

        .section-pad-sm {
            padding-top: 48px;
            padding-bottom: 48px;
        }

        /* Header / Nav */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 100;
            transition: background-color 0.35s ease, box-shadow 0.35s ease, backdrop-filter 0.35s ease;
            background-color: rgba(255, 255, 255, 0.62);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid rgba(226, 232, 240, 0.7);
            box-shadow: var(--shadow-glass);
        }

        .site-header.scrolled {
            background-color: rgba(255, 255, 255, 0.98);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid #E2E8F0;
            box-shadow: var(--shadow-nav);
        }

        .nav-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
            gap: 20px;
        }

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 20px;
            color: var(--text-dark);
            letter-spacing: -0.01em;
            white-space: nowrap;
        }

        .nav-logo-icon {
            width: 34px;
            height: 34px;
            border-radius: 9px;
            background: linear-gradient(135deg, #3B82F6, #2563EB);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-weight: 800;
            font-size: 17px;
            box-shadow: 0 2px 8px rgba(59, 130, 246, 0.35);
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .nav-link {
            display: inline-flex;
            align-items: center;
            padding: 8px 14px;
            font-size: 14.5px;
            font-weight: 500;
            color: var(--text-body);
            border-radius: 8px;
            transition: all 0.22s ease;
            white-space: nowrap;
            position: relative;
        }

        .nav-link:hover {
            color: var(--brand);
            background-color: var(--brand-pale);
        }

        .nav-link.active {
            color: var(--brand);
            background-color: var(--brand-pale);
            font-weight: 600;
        }

        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            border-radius: 2px;
            background-color: var(--brand);
        }

        .nav-cta {
            display: inline-flex;
            align-items: center;
            background-color: var(--brand);
            color: #fff;
            font-size: 14px;
            font-weight: 600;
            padding: 9px 18px;
            border-radius: var(--radius-btn);
            transition: all 0.25s ease;
            white-space: nowrap;
            box-shadow: 0 4px 14px rgba(59, 130, 246, 0.3);
        }

        .nav-cta:hover {
            background-color: var(--brand-dark);
            box-shadow: 0 6px 20px rgba(59, 130, 246, 0.4);
        }

        .nav-search-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: 9px;
            border: 1px solid var(--border);
            background-color: rgba(255, 255, 255, 0.5);
            color: var(--text-mute);
            transition: all 0.22s ease;
        }

        .nav-search-btn:hover {
            border-color: var(--brand);
            color: var(--brand);
            background-color: var(--brand-pale);
        }

        .mobile-menu-btn {
            display: none;
            width: 40px;
            height: 40px;
            border-radius: 9px;
            border: 1px solid var(--border);
            background-color: rgba(255, 255, 255, 0.6);
            color: var(--text-dark);
            align-items: center;
            justify-content: center;
            font-size: 20px;
            transition: all 0.22s ease;
        }

        .mobile-menu-btn:hover {
            border-color: var(--brand);
            color: var(--brand);
        }

        .mobile-menu-panel {
            display: none;
            position: fixed;
            top: 68px;
            left: 0;
            right: 0;
            background-color: rgba(255, 255, 255, 0.97);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border);
            box-shadow: 0 12px 30px rgba(15, 23, 42, 0.12);
            z-index: 99;
            padding: 16px 24px 24px;
            flex-direction: column;
            gap: 6px;
        }

        .mobile-menu-panel.open {
            display: flex;
        }

        .mobile-menu-panel a {
            display: block;
            padding: 12px 16px;
            border-radius: 10px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-body);
            transition: all 0.22s ease;
        }

        .mobile-menu-panel a:hover,
        .mobile-menu-panel a.active {
            background-color: var(--brand-pale);
            color: var(--brand);
        }

        /* Hero */
        .hero {
            position: relative;
            padding-top: 160px;
            padding-bottom: 80px;
            background-image: url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            min-height: 620px;
            display: flex;
            align-items: center;
            margin-bottom: 0;
        }

        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(248, 250, 252, 0.92) 0%, rgba(239, 246, 255, 0.82) 50%, rgba(248, 250, 252, 0.95) 100%);
            z-index: 1;
        }

        .hero-content {
            position: relative;
            z-index: 2;
            width: 100%;
        }

        .hero-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background-color: rgba(255, 255, 255, 0.85);
            border: 1px solid var(--border);
            color: var(--brand);
            font-size: 13px;
            font-weight: 600;
            padding: 6px 14px;
            border-radius: 20px;
            margin-bottom: 18px;
            backdrop-filter: blur(8px);
        }

        .hero-tag::before {
            content: '';
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background-color: var(--accent);
            animation: pulse-dot 2s ease-in-out infinite;
        }

        @keyframes pulse-dot {
            0%,
            100% {
                opacity: 1;
                transform: scale(1);
            }
            50% {
                opacity: 0.5;
                transform: scale(1.4);
            }
        }

        .hero h1 {
            font-size: 38px;
            font-weight: 700;
            color: var(--text-dark);
            line-height: 1.25;
            letter-spacing: -0.02em;
            margin-bottom: 18px;
            max-width: 680px;
        }

        .hero h1 .highlight {
            color: var(--brand);
        }

        .hero-sub {
            font-size: 17px;
            color: var(--text-body);
            line-height: 1.8;
            max-width: 620px;
            margin-bottom: 28px;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            margin-bottom: 30px;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background-color: var(--brand);
            color: #fff;
            font-size: 15px;
            font-weight: 600;
            padding: 13px 26px;
            border-radius: var(--radius-btn);
            transition: all 0.25s ease;
            box-shadow: 0 4px 16px rgba(59, 130, 246, 0.3);
            border: none;
        }

        .btn-primary:hover {
            background-color: var(--brand-dark);
            box-shadow: 0 8px 24px rgba(59, 130, 246, 0.42);
            transform: translateY(-1px);
        }

        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background-color: rgba(255, 255, 255, 0.85);
            color: var(--brand);
            font-size: 15px;
            font-weight: 600;
            padding: 13px 26px;
            border-radius: var(--radius-btn);
            border: 1.5px solid var(--brand);
            transition: all 0.25s ease;
            backdrop-filter: blur(8px);
        }

        .btn-secondary:hover {
            background-color: var(--brand-pale);
            border-color: var(--brand-dark);
            color: var(--brand-dark);
        }

        .hero-stats {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
        }

        .hero-stat {
            background-color: rgba(255, 255, 255, 0.82);
            border: 1px solid var(--border);
            border-radius: 12px;
            padding: 12px 20px;
            display: flex;
            align-items: center;
            gap: 10px;
            backdrop-filter: blur(8px);
        }

        .hero-stat-num {
            font-size: 22px;
            font-weight: 800;
            color: var(--text-dark);
            letter-spacing: -0.02em;
            line-height: 1;
        }

        .hero-stat-label {
            font-size: 13px;
            color: var(--text-mute);
            line-height: 1.3;
        }

        /* Section header */
        .section-head {
            margin-bottom: 42px;
        }

        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 13px;
            font-weight: 600;
            color: var(--brand);
            letter-spacing: 0.06em;
            text-transform: uppercase;
            margin-bottom: 8px;
        }

        .section-label::before {
            content: '';
            width: 18px;
            height: 2px;
            background-color: var(--brand);
            border-radius: 2px;
        }

        .section-title {
            font-size: 28px;
            font-weight: 700;
            color: var(--text-dark);
            line-height: 1.3;
            letter-spacing: -0.01em;
            margin-bottom: 14px;
        }

        .section-desc {
            font-size: 15.5px;
            color: var(--text-mute);
            line-height: 1.75;
            max-width: 620px;
        }

        /* Cards */
        .card {
            background-color: var(--surface-white);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border);
            transition: all 0.28s ease;
            overflow: hidden;
        }

        .card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
            border-color: var(--brand-light);
        }

        .card-cover {
            width: 100%;
            aspect-ratio: 16/9;
            object-fit: cover;
            background-color: var(--brand-pale);
        }

        .card-body {
            padding: 20px 22px;
        }

        .card-title {
            font-size: 17px;
            font-weight: 600;
            color: var(--text-dark);
            line-height: 1.45;
            margin-bottom: 8px;
        }

        .card-text {
            font-size: 14px;
            color: var(--text-mute);
            line-height: 1.65;
        }

        .card-date {
            font-size: 12.5px;
            color: var(--text-mute);
            margin-bottom: 8px;
        }

        .read-more {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            font-weight: 600;
            color: var(--brand);
            transition: all 0.22s ease;
        }

        .read-more:hover {
            color: var(--brand-dark);
            gap: 10px;
        }

        /* Badge */
        .badge {
            display: inline-flex;
            align-items: center;
            padding: 4px 12px;
            border-radius: 16px;
            font-size: 12px;
            font-weight: 600;
            letter-spacing: 0.02em;
        }

        .badge-blue {
            background-color: var(--brand-light);
            color: var(--brand-dark);
        }

        .badge-red {
            background-color: #FEE2E2;
            color: var(--accent);
        }

        .badge-orange {
            background-color: #FFEDD5;
            color: #C2410C;
        }

        /* Service area - asymmetric */
        .service-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr;
            gap: 24px;
        }

        .service-main-card {
            grid-row: span 2;
            background-color: var(--surface-white);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border);
            overflow: hidden;
            transition: all 0.28s ease;
            display: flex;
            flex-direction: column;
        }

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

        .service-main-card .card-cover {
            aspect-ratio: 16/10;
            width: 100%;
        }

        .service-main-card .card-body {
            padding: 28px 30px;
            flex: 1;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .service-mini-card {
            background-color: var(--surface-white);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border);
            padding: 20px 22px;
            transition: all 0.28s ease;
            display: flex;
            gap: 16px;
            align-items: flex-start;
        }

        .service-mini-card:hover {
            box-shadow: var(--shadow-card-hover);
            border-color: var(--brand-light);
        }

        .service-mini-icon {
            width: 44px;
            height: 44px;
            border-radius: 12px;
            background-color: var(--brand-pale);
            color: var(--brand);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            flex-shrink: 0;
        }

        /* Data stats area */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .stat-card {
            background-color: var(--surface-white);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border);
            padding: 24px 20px;
            text-align: center;
            transition: all 0.28s ease;
        }

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

        .stat-num {
            font-size: 36px;
            font-weight: 800;
            color: var(--text-dark);
            letter-spacing: -0.03em;
            line-height: 1.1;
            margin-bottom: 6px;
        }

        .stat-num .unit {
            font-size: 18px;
            font-weight: 600;
            color: var(--brand);
            margin-left: 2px;
        }

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

        /* News area */
        .news-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr;
            gap: 24px;
        }

        .news-item {
            display: flex;
            gap: 18px;
            padding: 18px 20px;
            background-color: var(--surface-white);
            border-radius: 14px;
            border: 1px solid var(--border);
            transition: all 0.28s ease;
            margin-bottom: 14px;
        }

        .news-item:hover {
            border-color: var(--brand-light);
            box-shadow: var(--shadow-card);
        }

        .news-thumb {
            width: 130px;
            height: 84px;
            border-radius: 10px;
            overflow: hidden;
            flex-shrink: 0;
            background-color: var(--brand-pale);
        }

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

        .news-content {
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .news-date {
            font-size: 12.5px;
            color: var(--text-mute);
            margin-bottom: 4px;
        }

        .news-title {
            font-size: 15.5px;
            font-weight: 600;
            color: var(--text-dark);
            line-height: 1.4;
            margin-bottom: 6px;
        }

        .news-summary {
            font-size: 13.5px;
            color: var(--text-mute);
            line-height: 1.6;
            margin-bottom: 8px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .news-sidebar {
            background-color: var(--surface-white);
            border-radius: var(--radius-card);
            border: 1px solid var(--border);
            box-shadow: var(--shadow-card);
            padding: 24px;
        }

        .news-sidebar-title {
            font-size: 16px;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: 16px;
            padding-bottom: 12px;
            border-bottom: 2px solid var(--brand-pale);
        }

        .news-sidebar-list {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .news-sidebar-list li {
            font-size: 14px;
            color: var(--text-body);
            line-height: 1.5;
            padding: 8px 12px;
            border-radius: 8px;
            transition: all 0.22s ease;
            cursor: pointer;
        }

        .news-sidebar-list li:hover {
            background-color: var(--brand-pale);
            color: var(--brand);
        }

        /* Deep content area */
        .deep-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 28px;
        }

        .deep-content-card {
            background-color: var(--surface-white);
            border-radius: var(--radius-card);
            border: 1px solid var(--border);
            box-shadow: var(--shadow-card);
            padding: 32px 30px;
            transition: all 0.28s ease;
        }

        .deep-content-card:hover {
            box-shadow: var(--shadow-card-hover);
        }

        .deep-content-card h3 {
            font-size: 19px;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: 14px;
            line-height: 1.4;
        }

        .deep-content-card p {
            font-size: 15px;
            color: var(--text-body);
            line-height: 1.85;
            margin-bottom: 14px;
        }

        .deep-content-card .deep-meta {
            font-size: 13px;
            color: var(--text-mute);
            display: flex;
            gap: 16px;
            margin-top: 16px;
            padding-top: 14px;
            border-top: 1px solid var(--border);
        }

        /* Brand intro */
        .brand-intro {
            background-color: var(--surface-white);
            border-radius: var(--radius-card);
            border: 1px solid var(--border);
            box-shadow: var(--shadow-card);
            padding: 36px 40px;
            transition: all 0.28s ease;
        }

        .brand-intro h2 {
            font-size: 22px;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: 16px;
        }

        .brand-intro p {
            font-size: 15.5px;
            color: var(--text-body);
            line-height: 1.9;
        }

        /* Timeline */
        .timeline {
            display: flex;
            flex-direction: column;
            gap: 0;
            position: relative;
            padding-left: 30px;
        }

        .timeline::before {
            content: '';
            position: absolute;
            left: 8px;
            top: 4px;
            bottom: 4px;
            width: 2px;
            background-color: var(--brand-light);
            border-radius: 2px;
        }

        .timeline-item {
            position: relative;
            padding-bottom: 24px;
        }

        .timeline-item:last-child {
            padding-bottom: 0;
        }

        .timeline-dot {
            position: absolute;
            left: -27px;
            top: 6px;
            width: 14px;
            height: 14px;
            border-radius: 50%;
            background-color: var(--brand);
            border: 3px solid var(--brand-pale);
            box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15);
        }

        .timeline-date {
            font-size: 13px;
            font-weight: 600;
            color: var(--brand);
            margin-bottom: 4px;
        }

        .timeline-title {
            font-size: 15.5px;
            font-weight: 600;
            color: var(--text-dark);
            margin-bottom: 4px;
        }

        .timeline-text {
            font-size: 14px;
            color: var(--text-mute);
            line-height: 1.65;
        }

        /* Guarantee bar */
        .guarantee-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 18px;
        }

        .guarantee-item {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 16px 18px;
            background-color: rgba(255, 255, 255, 0.8);
            border-radius: 14px;
            border: 1px solid var(--border);
            transition: all 0.25s ease;
        }

        .guarantee-item:hover {
            border-color: var(--brand-light);
            background-color: #fff;
        }

        .guarantee-icon {
            width: 40px;
            height: 40px;
            border-radius: 10px;
            background-color: var(--brand-pale);
            color: var(--brand);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            flex-shrink: 0;
        }

        .guarantee-label {
            font-size: 14px;
            font-weight: 600;
            color: var(--text-dark);
        }

        /* Opinion cards */
        .opinion-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 22px;
        }

        .opinion-card {
            background-color: var(--surface-white);
            border-radius: var(--radius-card);
            border: 1px solid var(--border);
            box-shadow: var(--shadow-card);
            padding: 24px 22px;
            transition: all 0.28s ease;
        }

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

        .opinion-tag {
            font-size: 12px;
            font-weight: 600;
            color: var(--brand);
            margin-bottom: 10px;
            display: inline-block;
        }

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

        .opinion-author {
            font-size: 13px;
            color: var(--text-mute);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .opinion-author::before {
            content: '';
            width: 20px;
            height: 1.5px;
            background-color: var(--brand-light);
        }

        /* Form */
        .form-section {
            background-color: var(--surface-white);
            border-radius: var(--radius-card);
            border: 1px solid var(--border);
            box-shadow: var(--shadow-card);
            padding: 40px;
        }

        .form-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 18px;
        }

        .form-group {
            display: flex;
            flex-direction: column;
            gap: 6px;
        }

        .form-group.full {
            grid-column: span 2;
        }

        .form-label {
            font-size: 14px;
            font-weight: 600;
            color: var(--text-dark);
        }

        .form-input {
            padding: 12px 16px;
            border: 1.5px solid #CBD5E1;
            border-radius: var(--radius-btn);
            font-size: 15px;
            color: var(--text-dark);
            background-color: #fff;
            transition: all 0.22s ease;
            outline: none;
        }

        .form-input:focus {
            border-color: var(--brand);
            box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
        }

        .form-textarea {
            min-height: 120px;
            resize: vertical;
        }

        /* FAQ */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .faq-item {
            background-color: var(--surface-white);
            border: 1px solid var(--border);
            border-radius: 12px;
            overflow: hidden;
            transition: all 0.28s ease;
        }

        .faq-item.open {
            border-color: var(--brand-light);
            box-shadow: var(--shadow-card);
        }

        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 18px 22px;
            font-size: 15.5px;
            font-weight: 600;
            color: var(--text-dark);
            text-align: left;
            transition: all 0.22s ease;
        }

        .faq-question:hover {
            color: var(--brand);
        }

        .faq-icon {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background-color: var(--brand-pale);
            color: var(--brand);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            font-weight: 700;
            transition: transform 0.3s ease;
            flex-shrink: 0;
        }

        .faq-item.open .faq-icon {
            transform: rotate(45deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
            padding: 0 22px;
            background-color: #F1F5F9;
            border-left: 3px solid var(--brand);
        }

        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 16px 22px 18px;
        }

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

        /* Footer */
        .site-footer {
            background-color: #0F172A;
            color: #CBD5E1;
            padding-top: 60px;
            padding-bottom: 30px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.2fr 1fr 1fr 1fr;
            gap: 32px;
            margin-bottom: 40px;
        }

        .footer-brand {
            font-size: 18px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 12px;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .footer-brand-icon {
            width: 32px;
            height: 32px;
            border-radius: 8px;
            background: linear-gradient(135deg, #3B82F6, #2563EB);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-weight: 800;
            font-size: 16px;
        }

        .footer-desc {
            font-size: 13.5px;
            color: #94A3B8;
            line-height: 1.7;
            max-width: 260px;
        }

        .footer-col-title {
            font-size: 15px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 14px;
        }

        .footer-links {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .footer-links a {
            font-size: 13.5px;
            color: #94A3B8;
            transition: color 0.22s ease;
        }

        .footer-links a:hover {
            color: #fff;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.12);
            padding-top: 24px;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            font-size: 13px;
            color: #94A3B8;
        }

        .footer-bottom a {
            color: #94A3B8;
            transition: color 0.22s ease;
        }

        .footer-bottom a:hover {
            color: #fff;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .service-grid {
                grid-template-columns: 1fr;
            }
            .service-main-card {
                grid-row: auto;
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .deep-grid {
                grid-template-columns: 1fr;
            }
            .opinion-grid {
                grid-template-columns: 1fr 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .guarantee-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            :root {
                --section-pad: 48px;
                --section-pad-mobile: 40px;
            }
            .nav-links {
                display: none;
            }
            .nav-cta {
                display: none;
            }
            .nav-search-btn {
                display: none;
            }
            .mobile-menu-btn {
                display: inline-flex;
            }
            .hero {
                padding-top: 130px;
                padding-bottom: 60px;
                min-height: 520px;
            }
            .hero h1 {
                font-size: 28px;
            }
            .hero-sub {
                font-size: 15.5px;
            }
            .hero-actions {
                flex-direction: column;
                align-items: stretch;
            }
            .hero-actions a {
                justify-content: center;
            }
            .hero-stats {
                gap: 10px;
            }
            .hero-stat {
                padding: 10px 14px;
            }
            .hero-stat-num {
                font-size: 18px;
            }
            .section-title {
                font-size: 22px;
            }
            .news-grid {
                grid-template-columns: 1fr;
            }
            .news-item {
                flex-direction: column;
            }
            .news-thumb {
                width: 100%;
                height: 160px;
            }
            .form-grid {
                grid-template-columns: 1fr;
            }
            .form-group.full {
                grid-column: auto;
            }
            .stats-grid {
                gap: 14px;
            }
            .stat-card {
                padding: 18px 14px;
            }
            .stat-num {
                font-size: 28px;
            }
            .opinion-grid {
                grid-template-columns: 1fr;
            }
            .guarantee-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
            }
            .brand-intro {
                padding: 24px 22px;
            }
            .deep-content-card {
                padding: 24px 20px;
            }
            .form-section {
                padding: 24px 20px;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
            .hero {
                min-height: 460px;
                padding-top: 120px;
            }
            .hero h1 {
                font-size: 24px;
            }
            .hero-sub {
                font-size: 14.5px;
            }
            .hero-stats {
                flex-wrap: wrap;
            }
            .hero-stat {
                flex: 1 1 45%;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
            }
            .stat-num {
                font-size: 24px;
            }
            .section-title {
                font-size: 20px;
            }
        }

/* roulang page: category2 */
:root {
            --brand: #3B82F6;
            --brand-dark: #2563EB;
            --brand-light: #DBEAFE;
            --brand-pale: #EFF6FF;
            --accent: #F04438;
            --accent-orange: #F97316;
            --surface-bg: #F8FAFC;
            --surface-white: #FFFFFF;
            --text-dark: #0F172A;
            --text-body: #334155;
            --text-mute: #64748B;
            --border: #E2E8F0;
            --radius-card: 16px;
            --radius-btn: 10px;
            --shadow-card: 0 4px 20px rgba(15, 23, 42, 0.06);
            --shadow-card-hover: 0 10px 30px rgba(15, 23, 42, 0.12);
            --shadow-nav: 0 2px 12px rgba(15, 23, 42, 0.08);
            --shadow-glass: 0 4px 24px rgba(15, 23, 42, 0.08);
            --container-max: 1200px;
            --section-pad: 80px;
            --section-pad-mobile: 48px;
        }

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: 'PingFang SC', 'Source Han Sans SC', 'Noto Sans SC', 'Microsoft YaHei', sans-serif;
            font-size: 16px;
            line-height: 1.75;
            color: var(--text-body);
            background-color: var(--surface-bg);
            overflow-x: hidden;
        }

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

        a {
            color: inherit;
            text-decoration: none;
            transition: color 0.25s ease;
        }

        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }

        button {
            cursor: pointer;
            border: none;
            background: none;
        }

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

        .section-pad {
            padding-top: var(--section-pad);
            padding-bottom: var(--section-pad);
        }

        .section-pad-sm {
            padding-top: 48px;
            padding-bottom: 48px;
        }

        /* Header / Nav */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 100;
            transition: background-color 0.35s ease, box-shadow 0.35s ease, backdrop-filter 0.35s ease;
            background-color: rgba(255, 255, 255, 0.62);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid rgba(226, 232, 240, 0.7);
            box-shadow: var(--shadow-glass);
        }

        .site-header.scrolled {
            background-color: rgba(255, 255, 255, 0.98);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid #E2E8F0;
            box-shadow: var(--shadow-nav);
        }

        .nav-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
            gap: 20px;
        }

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 20px;
            color: var(--text-dark);
            letter-spacing: -0.01em;
            white-space: nowrap;
        }

        .nav-logo-icon {
            width: 34px;
            height: 34px;
            border-radius: 9px;
            background: linear-gradient(135deg, #3B82F6, #2563EB);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-weight: 800;
            font-size: 17px;
            box-shadow: 0 2px 8px rgba(59, 130, 246, 0.35);
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .nav-link {
            display: inline-flex;
            align-items: center;
            padding: 8px 14px;
            font-size: 14.5px;
            font-weight: 500;
            color: var(--text-body);
            border-radius: 8px;
            transition: all 0.22s ease;
            white-space: nowrap;
            position: relative;
        }

        .nav-link:hover {
            color: var(--brand);
            background-color: var(--brand-pale);
        }

        .nav-link.active {
            color: var(--brand);
            background-color: var(--brand-pale);
            font-weight: 600;
        }

        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            border-radius: 2px;
            background-color: var(--brand);
        }

        .nav-cta {
            display: inline-flex;
            align-items: center;
            background-color: var(--brand);
            color: #fff;
            font-size: 14px;
            font-weight: 600;
            padding: 9px 18px;
            border-radius: var(--radius-btn);
            transition: all 0.25s ease;
            white-space: nowrap;
            box-shadow: 0 4px 14px rgba(59, 130, 246, 0.3);
        }

        .nav-cta:hover {
            background-color: var(--brand-dark);
            box-shadow: 0 6px 20px rgba(59, 130, 246, 0.4);
        }

        .nav-search-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: 9px;
            border: 1px solid var(--border);
            background-color: rgba(255, 255, 255, 0.5);
            color: var(--text-mute);
            transition: all 0.22s ease;
        }

        .nav-search-btn:hover {
            border-color: var(--brand);
            color: var(--brand);
            background-color: var(--brand-pale);
        }

        .mobile-menu-btn {
            display: none;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 9px;
            border: 1px solid var(--border);
            background-color: rgba(255, 255, 255, 0.6);
            color: var(--text-dark);
            transition: all 0.22s ease;
        }

        .mobile-menu-btn:hover {
            border-color: var(--brand);
            color: var(--brand);
        }

        .mobile-menu-panel {
            display: none;
            position: fixed;
            top: 68px;
            left: 0;
            right: 0;
            z-index: 99;
            background-color: rgba(255, 255, 255, 0.97);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--border);
            box-shadow: var(--shadow-nav);
            padding: 16px 24px 24px;
            flex-direction: column;
            gap: 8px;
        }

        .mobile-menu-panel.open {
            display: flex;
        }

        .mobile-menu-panel .nav-link {
            display: flex;
            padding: 12px 16px;
            font-size: 16px;
            border-radius: 10px;
        }

        .mobile-menu-panel .nav-cta {
            display: flex;
            justify-content: center;
            padding: 12px 18px;
            font-size: 15px;
            margin-top: 8px;
        }

        /* Breadcrumb */
        .breadcrumb {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 6px;
            font-size: 13.5px;
            color: var(--text-mute);
            margin-bottom: 16px;
        }

        .breadcrumb a {
            color: var(--brand);
            transition: color 0.2s ease;
        }

        .breadcrumb a:hover {
            color: var(--brand-dark);
        }

        .breadcrumb-sep {
            color: var(--border);
            font-size: 12px;
        }

        /* Category Hero */
        .category-hero {
            position: relative;
            padding-top: 138px;
            padding-bottom: 64px;
            background-image: url('/assets/images/backpic/back-2.webp');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            overflow: hidden;
        }

        .category-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(15, 23, 42, 0.55) 0%, rgba(15, 23, 42, 0.35) 50%, rgba(248, 250, 252, 0.98) 100%);
            pointer-events: none;
        }

        .category-hero-content {
            position: relative;
            z-index: 2;
            max-width: 860px;
        }

        .category-hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background-color: rgba(255, 255, 255, 0.15);
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
            border: 1px solid rgba(255, 255, 255, 0.3);
            color: #fff;
            font-size: 13px;
            font-weight: 600;
            padding: 6px 14px;
            border-radius: 20px;
            margin-bottom: 18px;
            letter-spacing: 0.02em;
        }

        .category-hero-title {
            font-size: 36px;
            font-weight: 700;
            color: #fff;
            line-height: 1.35;
            margin-bottom: 16px;
            letter-spacing: -0.01em;
            text-shadow: 0 1px 8px rgba(15, 23, 42, 0.3);
        }

        .category-hero-title span {
            color: #93C5FD;
        }

        .category-hero-desc {
            font-size: 16px;
            color: rgba(255, 255, 255, 0.9);
            line-height: 1.8;
            max-width: 760px;
            text-shadow: 0 1px 4px rgba(15, 23, 42, 0.25);
        }

        /* Article list - alternating layout */
        .article-item {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 32px;
            align-items: center;
            background: var(--surface-white);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 28px;
            margin-bottom: 28px;
            transition: all 0.3s ease;
            border: 1px solid transparent;
        }

        .article-item:hover {
            box-shadow: var(--shadow-card-hover);
            border-color: var(--brand-light);
            transform: translateY(-2px);
        }

        .article-item .article-text {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .article-item .article-image {
            border-radius: 12px;
            overflow: hidden;
            aspect-ratio: 16/9;
            background-color: var(--brand-pale);
            position: relative;
        }

        .article-item .article-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.35s ease;
        }

        .article-item:hover .article-image img {
            transform: scale(1.03);
        }

        .article-item:nth-child(odd) .article-image {
            order: 2;
        }

        .article-item:nth-child(odd) .article-text {
            order: 1;
        }

        .article-item:nth-child(even) .article-image {
            order: 1;
        }

        .article-item:nth-child(even) .article-text {
            order: 2;
        }

        .article-date {
            font-size: 13px;
            color: var(--text-mute);
            display: flex;
            align-items: center;
            gap: 6px;
            letter-spacing: 0.01em;
        }

        .article-date::before {
            content: '';
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background-color: var(--brand);
        }

        .article-title {
            font-size: 20px;
            font-weight: 700;
            color: var(--text-dark);
            line-height: 1.45;
            letter-spacing: -0.005em;
        }

        .article-summary {
            font-size: 14.5px;
            color: var(--text-body);
            line-height: 1.75;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .article-read-more {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            font-weight: 600;
            color: var(--brand);
            transition: all 0.25s ease;
            align-self: flex-start;
        }

        .article-read-more .arrow {
            transition: transform 0.25s ease;
        }

        .article-read-more:hover {
            color: var(--brand-dark);
        }

        .article-read-more:hover .arrow {
            transform: translateX(4px);
        }

        /* Sidebar */
        .sidebar-card {
            background: var(--surface-white);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 24px;
            margin-bottom: 24px;
            border: 1px solid var(--border);
        }

        .sidebar-card-title {
            font-size: 17px;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: 16px;
            padding-bottom: 12px;
            border-bottom: 1px solid var(--border);
            letter-spacing: -0.01em;
        }

        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }

        .tag-item {
            display: inline-flex;
            align-items: center;
            padding: 6px 14px;
            font-size: 13px;
            font-weight: 500;
            color: var(--text-body);
            background-color: var(--surface-bg);
            border: 1px solid var(--border);
            border-radius: 20px;
            transition: all 0.22s ease;
            white-space: nowrap;
        }

        .tag-item:hover {
            border-color: var(--brand);
            color: var(--brand);
            background-color: var(--brand-pale);
        }

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

        .ranking-item {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            padding: 10px 12px;
            border-radius: 10px;
            transition: all 0.22s ease;
            cursor: default;
        }

        .ranking-item:hover {
            background-color: var(--brand-pale);
        }

        .ranking-num {
            font-size: 22px;
            font-weight: 800;
            color: var(--brand-light);
            line-height: 1;
            min-width: 28px;
            text-align: center;
        }

        .ranking-item:nth-child(1) .ranking-num {
            color: var(--accent);
        }

        .ranking-item:nth-child(2) .ranking-num {
            color: var(--accent-orange);
        }

        .ranking-item:nth-child(3) .ranking-num {
            color: #EAB308;
        }

        .ranking-text {
            font-size: 14px;
            color: var(--text-body);
            line-height: 1.5;
            font-weight: 500;
        }

        /* FAQ */
        .faq-item {
            background: var(--surface-white);
            border: 1px solid var(--border);
            border-radius: 12px;
            margin-bottom: 14px;
            overflow: hidden;
            transition: all 0.3s ease;
        }

        .faq-item.open {
            border-color: var(--brand-light);
            box-shadow: var(--shadow-card);
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            padding: 18px 22px;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-dark);
            text-align: left;
            transition: all 0.25s ease;
            gap: 16px;
        }

        .faq-question:hover {
            color: var(--brand);
        }

        .faq-question .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background-color: var(--brand-pale);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--brand);
            font-size: 18px;
            font-weight: 700;
            transition: all 0.3s ease;
        }

        .faq-item.open .faq-question .faq-icon {
            background-color: var(--brand);
            color: #fff;
            transform: rotate(45deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 0 22px;
            color: var(--text-body);
            font-size: 15px;
            line-height: 1.8;
        }

        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 22px 20px;
            background-color: #F8FAFC;
            border-left: 3px solid var(--brand);
            margin-left: 0;
        }

        /* CTA */
        .cta-section {
            background-color: var(--brand);
            border-radius: var(--radius-card);
            padding: 44px 40px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 28px;
            flex-wrap: wrap;
            box-shadow: 0 8px 30px rgba(59, 130, 246, 0.3);
        }

        .cta-text {
            flex: 1;
            min-width: 260px;
        }

        .cta-text h3 {
            font-size: 24px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 8px;
        }

        .cta-text p {
            font-size: 15px;
            color: rgba(255, 255, 255, 0.88);
            line-height: 1.7;
        }

        .cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background-color: #fff;
            color: var(--brand);
            font-size: 15px;
            font-weight: 700;
            padding: 13px 26px;
            border-radius: var(--radius-btn);
            transition: all 0.25s ease;
            white-space: nowrap;
            box-shadow: 0 4px 16px rgba(15, 23, 42, 0.15);
        }

        .cta-btn:hover {
            background-color: var(--brand-pale);
            box-shadow: 0 6px 24px rgba(15, 23, 42, 0.2);
        }

        .cta-btn.ghost {
            background-color: transparent;
            color: #fff;
            border: 1.5px solid rgba(255, 255, 255, 0.5);
            box-shadow: none;
        }

        .cta-btn.ghost:hover {
            background-color: rgba(255, 255, 255, 0.15);
            border-color: #fff;
        }

        /* Footer */
        .site-footer {
            background-color: #0F172A;
            color: #94A3B8;
            padding-top: 56px;
            padding-bottom: 28px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.2fr;
            gap: 32px;
            margin-bottom: 36px;
        }

        .footer-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 19px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 14px;
        }

        .footer-brand-icon {
            width: 32px;
            height: 32px;
            border-radius: 8px;
            background: linear-gradient(135deg, #3B82F6, #2563EB);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-weight: 800;
            font-size: 15px;
        }

        .footer-desc {
            font-size: 14px;
            color: #94A3B8;
            line-height: 1.75;
            max-width: 340px;
        }

        .footer-col-title {
            font-size: 15px;
            font-weight: 700;
            color: #E2E8F0;
            margin-bottom: 14px;
        }

        .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .footer-links a {
            font-size: 14px;
            color: #94A3B8;
            transition: color 0.22s ease;
        }

        .footer-links a:hover {
            color: #3B82F6;
        }

        .footer-bottom {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 16px;
            padding-top: 24px;
            border-top: 1px solid #1E293B;
            font-size: 13px;
            color: #64748B;
        }

        .footer-bottom a {
            color: #64748B;
            transition: color 0.22s ease;
        }

        .footer-bottom a:hover {
            color: #3B82F6;
        }

        /* Load more */
        .load-more-btn {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 14px 32px;
            font-size: 15px;
            font-weight: 600;
            color: var(--brand);
            background-color: var(--surface-white);
            border: 1.5px solid var(--brand);
            border-radius: var(--radius-btn);
            transition: all 0.25s ease;
            margin: 8px auto 0;
        }

        .load-more-btn:hover {
            background-color: var(--brand-pale);
            border-color: var(--brand-dark);
            color: var(--brand-dark);
            box-shadow: var(--shadow-card);
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
            .article-item {
                gap: 20px;
                padding: 22px;
            }
            .category-hero-title {
                font-size: 30px;
            }
        }

        @media (max-width: 768px) {
            .nav-links {
                display: none;
            }
            .nav-search-btn {
                display: none;
            }
            .mobile-menu-btn {
                display: flex;
            }
            .nav-cta.desktop-cta {
                display: none;
            }
            .article-item {
                grid-template-columns: 1fr;
                gap: 18px;
                padding: 20px;
            }
            .article-item:nth-child(odd) .article-image,
            .article-item:nth-child(even) .article-image {
                order: 2;
            }
            .article-item:nth-child(odd) .article-text,
            .article-item:nth-child(even) .article-text {
                order: 1;
            }
            .category-hero {
                padding-top: 110px;
                padding-bottom: 48px;
            }
            .category-hero-title {
                font-size: 26px;
            }
            .category-hero-desc {
                font-size: 14.5px;
            }
            .section-pad {
                padding-top: 48px;
                padding-bottom: 48px;
            }
            .cta-section {
                flex-direction: column;
                align-items: flex-start;
                padding: 32px 26px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                gap: 8px;
            }
        }

        @media (max-width: 520px) {
            .category-hero-title {
                font-size: 22px;
            }
            .article-title {
                font-size: 17px;
            }
            .article-summary {
                font-size: 13.5px;
                -webkit-line-clamp: 4;
            }
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
            .article-item {
                padding: 16px;
                border-radius: 12px;
            }
            .sidebar-card {
                padding: 18px;
            }
            .cta-text h3 {
                font-size: 20px;
            }
        }

/* roulang page: category1 */
:root {
            --brand: #3B82F6;
            --brand-dark: #2563EB;
            --brand-light: #DBEAFE;
            --brand-pale: #EFF6FF;
            --accent: #F04438;
            --accent-orange: #F97316;
            --surface-bg: #F8FAFC;
            --surface-white: #FFFFFF;
            --text-dark: #0F172A;
            --text-body: #334155;
            --text-mute: #64748B;
            --border: #E2E8F0;
            --radius-card: 16px;
            --radius-btn: 10px;
            --shadow-card: 0 4px 20px rgba(15, 23, 42, 0.06);
            --shadow-card-hover: 0 10px 30px rgba(15, 23, 42, 0.12);
            --shadow-nav: 0 2px 12px rgba(15, 23, 42, 0.08);
            --shadow-glass: 0 4px 24px rgba(15, 23, 42, 0.08);
            --container-max: 1200px;
            --section-pad: 80px;
            --section-pad-mobile: 48px;
        }

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: 'PingFang SC', 'Source Han Sans SC', 'Noto Sans SC', 'Microsoft YaHei', sans-serif;
            font-size: 16px;
            line-height: 1.75;
            color: var(--text-body);
            background-color: var(--surface-bg);
            overflow-x: hidden;
        }

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

        a {
            color: inherit;
            text-decoration: none;
            transition: color 0.25s ease;
        }

        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }

        button {
            cursor: pointer;
            border: none;
            background: none;
        }

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

        .section-pad {
            padding-top: var(--section-pad);
            padding-bottom: var(--section-pad);
        }

        .section-pad-sm {
            padding-top: 48px;
            padding-bottom: 48px;
        }

        /* Header / Nav */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 100;
            transition: background-color 0.35s ease, box-shadow 0.35s ease, backdrop-filter 0.35s ease;
            background-color: rgba(255, 255, 255, 0.62);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid rgba(226, 232, 240, 0.7);
            box-shadow: var(--shadow-glass);
        }

        .site-header.scrolled {
            background-color: rgba(255, 255, 255, 0.98);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid #E2E8F0;
            box-shadow: var(--shadow-nav);
        }

        .nav-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
            gap: 20px;
        }

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 20px;
            color: var(--text-dark);
            letter-spacing: -0.01em;
            white-space: nowrap;
        }

        .nav-logo-icon {
            width: 34px;
            height: 34px;
            border-radius: 9px;
            background: linear-gradient(135deg, #3B82F6, #2563EB);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-weight: 800;
            font-size: 17px;
            box-shadow: 0 2px 8px rgba(59, 130, 246, 0.35);
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .nav-link {
            display: inline-flex;
            align-items: center;
            padding: 8px 14px;
            font-size: 14.5px;
            font-weight: 500;
            color: var(--text-body);
            border-radius: 8px;
            transition: all 0.22s ease;
            white-space: nowrap;
            position: relative;
        }

        .nav-link:hover {
            color: var(--brand);
            background-color: var(--brand-pale);
        }

        .nav-link.active {
            color: var(--brand);
            background-color: var(--brand-pale);
            font-weight: 600;
        }

        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            border-radius: 2px;
            background-color: var(--brand);
        }

        .nav-cta {
            display: inline-flex;
            align-items: center;
            background-color: var(--brand);
            color: #fff;
            font-size: 14px;
            font-weight: 600;
            padding: 9px 18px;
            border-radius: var(--radius-btn);
            transition: all 0.25s ease;
            white-space: nowrap;
            box-shadow: 0 4px 14px rgba(59, 130, 246, 0.3);
        }

        .nav-cta:hover {
            background-color: var(--brand-dark);
            box-shadow: 0 6px 20px rgba(59, 130, 246, 0.4);
        }

        .nav-search-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: 9px;
            border: 1px solid var(--border);
            background-color: rgba(255, 255, 255, 0.5);
            color: var(--text-mute);
            transition: all 0.22s ease;
        }

        .nav-search-btn:hover {
            border-color: var(--brand);
            color: var(--brand);
            background-color: var(--brand-pale);
        }

        .mobile-menu-btn {
            display: none;
            width: 40px;
            height: 40px;
            border-radius: 9px;
            border: 1px solid var(--border);
            background-color: rgba(255, 255, 255, 0.5);
            align-items: center;
            justify-content: center;
            color: var(--text-dark);
            transition: all 0.22s ease;
        }

        .mobile-menu-btn:hover {
            border-color: var(--brand);
            color: var(--brand);
        }

        /* Buttons */
        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background-color: var(--brand);
            color: #fff;
            font-size: 15px;
            font-weight: 600;
            padding: 12px 26px;
            border-radius: var(--radius-btn);
            transition: all 0.25s ease;
            box-shadow: 0 4px 14px rgba(59, 130, 246, 0.28);
        }

        .btn-primary:hover {
            background-color: var(--brand-dark);
            box-shadow: 0 6px 20px rgba(59, 130, 246, 0.38);
            transform: translateY(-1px);
        }

        .btn-outline {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background-color: transparent;
            color: var(--brand);
            font-size: 15px;
            font-weight: 600;
            padding: 11px 24px;
            border-radius: var(--radius-btn);
            border: 1.5px solid var(--brand);
            transition: all 0.25s ease;
        }

        .btn-outline:hover {
            background-color: var(--brand-pale);
            border-color: var(--brand-dark);
            color: var(--brand-dark);
        }

        .btn-read-more {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            font-weight: 600;
            color: var(--brand);
            transition: all 0.22s ease;
        }

        .btn-read-more:hover {
            color: var(--brand-dark);
            gap: 10px;
        }

        /* Cards */
        .card {
            background-color: var(--surface-white);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            transition: all 0.3s ease;
            border: 1px solid rgba(226, 232, 240, 0.5);
        }

        .card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
            border-color: var(--brand-light);
        }

        /* Category Hero */
        .category-hero {
            position: relative;
            padding-top: 140px;
            padding-bottom: 72px;
            background-image: linear-gradient(rgba(248, 250, 252, 0.88), rgba(239, 246, 255, 0.82)), url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            border-bottom: 1px solid var(--border);
        }

        .category-hero::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 60px;
            background: linear-gradient(to top, var(--surface-bg), transparent);
            pointer-events: none;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--text-mute);
            margin-bottom: 18px;
        }

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

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

        .breadcrumb .separator {
            color: #94A3B8;
        }

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

        .live-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background-color: rgba(240, 68, 56, 0.1);
            color: var(--accent);
            font-size: 13px;
            font-weight: 600;
            padding: 4px 12px;
            border-radius: 20px;
            border: 1px solid rgba(240, 68, 56, 0.25);
            margin-bottom: 16px;
        }

        .live-badge .dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background-color: var(--accent);
            animation: pulse-dot 1.5s ease-in-out infinite;
        }

        @keyframes pulse-dot {
            0%, 100% { opacity: 1; }
            50% { opacity: 0.4; }
        }

        .countdown-box {
            display: inline-flex;
            align-items: center;
            gap: 16px;
            background-color: rgba(255, 255, 255, 0.82);
            border: 1px solid var(--border);
            border-radius: 12px;
            padding: 12px 20px;
            box-shadow: 0 2px 10px rgba(15, 23, 42, 0.05);
            margin-top: 20px;
            flex-wrap: wrap;
        }

        .countdown-label {
            font-size: 13px;
            font-weight: 500;
            color: var(--text-mute);
        }

        .countdown-timer {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .countdown-unit {
            display: flex;
            flex-direction: column;
            align-items: center;
        }

        .countdown-value {
            font-size: 24px;
            font-weight: 700;
            color: var(--text-dark);
            line-height: 1.2;
            font-variant-numeric: tabular-nums;
        }

        .countdown-unit-label {
            font-size: 11px;
            color: var(--text-mute);
        }

        .countdown-separator {
            font-size: 24px;
            font-weight: 700;
            color: var(--brand);
        }

        /* Timeline */
        .timeline-wrapper {
            position: relative;
            padding-left: 40px;
        }

        .timeline-wrapper::before {
            content: '';
            position: absolute;
            left: 15px;
            top: 8px;
            bottom: 8px;
            width: 2px;
            background: linear-gradient(to bottom, var(--brand-light), var(--border), var(--brand-light));
            border-radius: 2px;
        }

        .timeline-item {
            position: relative;
            margin-bottom: 28px;
            padding-bottom: 8px;
        }

        .timeline-item::before {
            content: '';
            position: absolute;
            left: -32px;
            top: 8px;
            width: 14px;
            height: 14px;
            border-radius: 50%;
            background-color: var(--brand);
            border: 3px solid #fff;
            box-shadow: 0 0 0 3px var(--brand-light);
            z-index: 1;
        }

        .timeline-item.highlight::before {
            background-color: var(--accent);
            box-shadow: 0 0 0 3px rgba(240, 68, 56, 0.15);
        }

        .timeline-date {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 13px;
            font-weight: 600;
            color: var(--brand);
            background-color: var(--brand-pale);
            padding: 4px 12px;
            border-radius: 20px;
            margin-bottom: 10px;
        }

        .timeline-item.highlight .timeline-date {
            color: var(--accent);
            background-color: rgba(240, 68, 56, 0.08);
        }

        .timeline-card {
            display: flex;
            gap: 24px;
            background-color: var(--surface-white);
            border-radius: 14px;
            padding: 20px;
            border: 1px solid var(--border);
            box-shadow: 0 2px 10px rgba(15, 23, 42, 0.04);
            transition: all 0.3s ease;
        }

        .timeline-card:hover {
            box-shadow: var(--shadow-card-hover);
            border-color: var(--brand-light);
            transform: translateX(4px);
        }

        .timeline-card-img {
            flex-shrink: 0;
            width: 180px;
            height: 120px;
            border-radius: 10px;
            overflow: hidden;
            object-fit: cover;
        }

        .timeline-card-content {
            flex: 1;
            min-width: 0;
        }

        .timeline-card-title {
            font-size: 18px;
            font-weight: 600;
            color: var(--text-dark);
            margin-bottom: 8px;
            line-height: 1.5;
        }

        .timeline-card-desc {
            font-size: 14px;
            color: var(--text-body);
            line-height: 1.7;
            margin-bottom: 12px;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        /* Sidebar */
        .sidebar-card {
            background-color: var(--surface-white);
            border-radius: var(--radius-card);
            padding: 24px;
            box-shadow: var(--shadow-card);
            border: 1px solid rgba(226, 232, 240, 0.5);
            margin-bottom: 24px;
        }

        .sidebar-card-title {
            font-size: 16px;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: 16px;
            padding-bottom: 12px;
            border-bottom: 2px solid var(--brand-light);
            position: relative;
        }

        .sidebar-card-title::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 40px;
            height: 2px;
            background-color: var(--brand);
            border-radius: 2px;
        }

        .tag-group {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }

        .tag {
            display: inline-flex;
            align-items: center;
            font-size: 13px;
            font-weight: 500;
            color: var(--text-body);
            background-color: var(--surface-bg);
            border: 1px solid var(--border);
            border-radius: 20px;
            padding: 4px 14px;
            transition: all 0.2s ease;
        }

        .tag:hover {
            color: var(--brand);
            border-color: var(--brand);
            background-color: var(--brand-pale);
        }

        .rank-list {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .rank-item {
            display: flex;
            gap: 12px;
            align-items: flex-start;
            padding: 12px 0;
            border-bottom: 1px solid #F1F5F9;
            transition: all 0.2s ease;
        }

        .rank-item:last-child {
            border-bottom: none;
        }

        .rank-item:hover {
            padding-left: 4px;
        }

        .rank-number {
            flex-shrink: 0;
            width: 26px;
            height: 26px;
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 13px;
            font-weight: 700;
            color: var(--text-mute);
            background-color: var(--surface-bg);
        }

        .rank-item:first-child .rank-number {
            background-color: var(--accent);
            color: #fff;
        }

        .rank-item:nth-child(2) .rank-number {
            background-color: var(--accent-orange);
            color: #fff;
        }

        .rank-item:nth-child(3) .rank-number {
            background-color: #F59E0B;
            color: #fff;
        }

        .rank-title {
            font-size: 14px;
            font-weight: 500;
            color: var(--text-dark);
            line-height: 1.5;
            transition: color 0.2s ease;
        }

        .rank-title:hover {
            color: var(--brand);
        }

        .rank-date {
            font-size: 12px;
            color: var(--text-mute);
        }

        /* FAQ */
        .faq-list {
            border-radius: var(--radius-card);
            overflow: hidden;
            background-color: var(--surface-white);
            border: 1px solid var(--border);
            box-shadow: var(--shadow-card);
        }

        .faq-item {
            border-bottom: 1px solid var(--border);
        }

        .faq-item:last-child {
            border-bottom: none;
        }

        .faq-question {
            width: 100%;
            padding: 18px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-dark);
            text-align: left;
            transition: all 0.25s ease;
            background-color: transparent;
        }

        .faq-question:hover {
            background-color: var(--brand-pale);
        }

        .faq-question .faq-icon {
            flex-shrink: 0;
            width: 32px;
            height: 32px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            background-color: var(--surface-bg);
            color: var(--text-mute);
            font-size: 18px;
            transition: all 0.25s ease;
        }

        .faq-item.active .faq-question .faq-icon {
            background-color: var(--brand);
            color: #fff;
            transform: rotate(45deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease;
        }

        .faq-item.active .faq-answer {
            max-height: 300px;
        }

        .faq-answer-inner {
            padding: 0 24px 20px 24px;
            font-size: 15px;
            line-height: 1.8;
            color: var(--text-body);
            border-left: 3px solid var(--brand);
            margin-left: 24px;
            padding-left: 20px;
            background-color: var(--brand-pale);
            margin-right: 24px;
            border-radius: 0 8px 8px 0;
            padding-top: 12px;
            padding-bottom: 16px;
        }

        /* CTA */
        .cta-section {
            background-color: var(--brand);
            border-radius: 20px;
            padding: 48px 40px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -20%;
            width: 400px;
            height: 400px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.06);
        }

        .cta-section::after {
            content: '';
            position: absolute;
            bottom: -40%;
            left: -10%;
            width: 300px;
            height: 300px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.04);
        }

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

        /* Footer */
        .site-footer {
            background-color: #0F172A;
            color: #CBD5E1;
            padding-top: 48px;
            padding-bottom: 20px;
            margin-top: 48px;
        }

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

        .footer-brand {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 18px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 12px;
        }

        .footer-brand-icon {
            width: 28px;
            height: 28px;
            border-radius: 7px;
            background: linear-gradient(135deg, var(--brand), var(--brand-dark));
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-weight: 800;
            font-size: 13px;
        }

        .footer-desc {
            font-size: 14px;
            line-height: 1.7;
            color: #94A3B8;
            max-width: 380px;
        }

        .footer-col-title {
            font-size: 16px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 14px;
        }

        .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .footer-links li {
            margin-bottom: 8px;
        }

        .footer-links a {
            font-size: 14px;
            color: #94A3B8;
            transition: color 0.22s ease;
        }

        .footer-links a:hover {
            color: var(--brand-light);
        }

        .footer-bottom {
            border-top: 1px solid rgba(148, 163, 184, 0.2);
            padding-top: 20px;
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            align-items: center;
            font-size: 13px;
            color: #94A3B8;
        }

        .footer-bottom a {
            color: #94A3B8;
        }

        .footer-bottom a:hover {
            color: #fff;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }

            .timeline-card {
                flex-direction: column;
            }

            .timeline-card-img {
                width: 100%;
                height: 180px;
            }

            .timeline-wrapper {
                padding-left: 32px;
            }

            .timeline-item::before {
                left: -24px;
            }
        }

        @media (max-width: 768px) {
            .nav-links {
                display: none;
                position: absolute;
                top: 68px;
                left: 0;
                right: 0;
                flex-direction: column;
                align-items: stretch;
                background-color: rgba(255, 255, 255, 0.98);
                backdrop-filter: blur(20px);
                -webkit-backdrop-filter: blur(20px);
                border-bottom: 1px solid var(--border);
                box-shadow: var(--shadow-nav);
                padding: 16px 20px;
                gap: 4px;
            }

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

            .nav-link {
                padding: 12px 16px;
                font-size: 15px;
                border-radius: 10px;
            }

            .mobile-menu-btn {
                display: flex;
            }

            .nav-cta {
                display: none;
            }

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

            .nav-inner {
                height: 60px;
            }

            .site-header {
                top: 0;
            }

            .category-hero {
                padding-top: 110px;
                padding-bottom: 56px;
            }

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

            .section-pad-sm {
                padding-top: 36px;
                padding-bottom: 36px;
            }

            .timeline-wrapper {
                padding-left: 24px;
            }

            .timeline-wrapper::before {
                left: 8px;
            }

            .timeline-item::before {
                left: -16px;
                width: 12px;
                height: 12px;
                border-width: 2px;
            }

            .timeline-card {
                padding: 16px;
                gap: 16px;
            }

            .timeline-card-title {
                font-size: 16px;
            }

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

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

            .countdown-box {
                padding: 10px 16px;
                gap: 8px;
            }

            .countdown-value {
                font-size: 20px;
            }

            .countdown-separator {
                font-size: 20px;
            }
        }

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

            .timeline-wrapper {
                padding-left: 16px;
            }

            .timeline-wrapper::before {
                left: 4px;
            }

            .timeline-item::before {
                left: -12px;
                width: 10px;
                height: 10px;
                border-width: 2px;
            }

            .category-hero {
                padding-top: 100px;
                padding-bottom: 44px;
            }

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

            .faq-answer-inner {
                margin-left: 16px;
                margin-right: 16px;
                padding-left: 16px;
                font-size: 14px;
            }

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

/* roulang page: category4 */
:root {
            --brand: #3B82F6;
            --brand-dark: #2563EB;
            --brand-light: #DBEAFE;
            --brand-pale: #EFF6FF;
            --accent: #F04438;
            --accent-orange: #F97316;
            --surface-bg: #F8FAFC;
            --surface-white: #FFFFFF;
            --text-dark: #0F172A;
            --text-body: #334155;
            --text-mute: #64748B;
            --border: #E2E8F0;
            --radius-card: 16px;
            --radius-btn: 10px;
            --shadow-card: 0 4px 20px rgba(15, 23, 42, 0.06);
            --shadow-card-hover: 0 10px 30px rgba(15, 23, 42, 0.12);
            --shadow-nav: 0 2px 12px rgba(15, 23, 42, 0.08);
            --shadow-glass: 0 4px 24px rgba(15, 23, 42, 0.08);
            --container-max: 1200px;
            --section-pad: 48px;
            --section-pad-mobile: 40px;
        }

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: 'PingFang SC', 'Source Han Sans SC', 'Noto Sans SC', 'Microsoft YaHei', sans-serif;
            font-size: 16px;
            line-height: 1.75;
            color: var(--text-body);
            background-color: var(--surface-bg);
            overflow-x: hidden;
        }

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

        a {
            color: inherit;
            text-decoration: none;
            transition: color 0.25s ease;
        }

        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }

        button {
            cursor: pointer;
            border: none;
            background: none;
        }

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

        .section-pad {
            padding-top: var(--section-pad);
            padding-bottom: var(--section-pad);
        }

        .section-pad-sm {
            padding-top: 40px;
            padding-bottom: 40px;
        }

        /* Header / Nav */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 100;
            transition: background-color 0.35s ease, box-shadow 0.35s ease, backdrop-filter 0.35s ease;
            background-color: rgba(255, 255, 255, 0.62);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid rgba(226, 232, 240, 0.7);
            box-shadow: var(--shadow-glass);
        }

        .site-header.scrolled {
            background-color: rgba(255, 255, 255, 0.98);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid #E2E8F0;
            box-shadow: var(--shadow-nav);
        }

        .nav-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
            gap: 20px;
        }

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 20px;
            color: var(--text-dark);
            letter-spacing: -0.01em;
            white-space: nowrap;
        }

        .nav-logo-icon {
            width: 34px;
            height: 34px;
            border-radius: 9px;
            background: linear-gradient(135deg, #3B82F6, #2563EB);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-weight: 800;
            font-size: 17px;
            box-shadow: 0 2px 8px rgba(59, 130, 246, 0.35);
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .nav-link {
            display: inline-flex;
            align-items: center;
            padding: 8px 14px;
            font-size: 14.5px;
            font-weight: 500;
            color: var(--text-body);
            border-radius: 8px;
            transition: all 0.22s ease;
            white-space: nowrap;
            position: relative;
        }

        .nav-link:hover {
            color: var(--brand);
            background-color: var(--brand-pale);
        }

        .nav-link.active {
            color: var(--brand);
            background-color: var(--brand-pale);
            font-weight: 600;
        }

        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            border-radius: 2px;
            background-color: var(--brand);
        }

        .nav-cta {
            display: inline-flex;
            align-items: center;
            background-color: var(--brand);
            color: #fff;
            font-size: 14px;
            font-weight: 600;
            padding: 9px 18px;
            border-radius: var(--radius-btn);
            transition: all 0.25s ease;
            white-space: nowrap;
            box-shadow: 0 4px 14px rgba(59, 130, 246, 0.3);
        }

        .nav-cta:hover {
            background-color: var(--brand-dark);
            box-shadow: 0 6px 20px rgba(59, 130, 246, 0.4);
        }

        .nav-search-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: 9px;
            border: 1px solid var(--border);
            background-color: rgba(255, 255, 255, 0.5);
            color: var(--text-mute);
            transition: all 0.22s ease;
        }

        .nav-search-btn:hover {
            border-color: var(--brand);
            color: var(--brand);
            background-color: var(--brand-pale);
        }

        .mobile-menu-btn {
            display: none;
            width: 40px;
            height: 40px;
            border-radius: 9px;
            border: 1px solid var(--border);
            background-color: rgba(255, 255, 255, 0.6);
            align-items: center;
            justify-content: center;
            color: var(--text-body);
            transition: all 0.22s ease;
        }

        .mobile-menu-btn:hover {
            border-color: var(--brand);
            color: var(--brand);
        }

        .mobile-menu {
            display: none;
            background-color: rgba(255, 255, 255, 0.98);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-top: 1px solid var(--border);
            padding: 12px 16px 20px;
            box-shadow: 0 12px 30px rgba(15, 23, 42, 0.1);
        }

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

        .mobile-menu .nav-link {
            display: flex;
            padding: 12px 10px;
            border-radius: 8px;
            font-size: 15px;
        }

        /* Hero */
        .category-hero {
            position: relative;
            padding-top: 68px;
            background-image: url('/assets/images/backpic/back-2.webp');
            background-size: cover;
            background-position: center;
            background-color: #1e293b;
            min-height: 340px;
            display: flex;
            align-items: center;
        }

        .category-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15, 23, 42, 0.82) 0%, rgba(15, 23, 42, 0.55) 45%, rgba(59, 130, 246, 0.35) 100%);
        }

        .category-hero .container {
            position: relative;
            z-index: 1;
            padding-top: 56px;
            padding-bottom: 56px;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13.5px;
            color: rgba(255, 255, 255, 0.75);
            margin-bottom: 18px;
            flex-wrap: wrap;
        }

        .breadcrumb a {
            color: rgba(255, 255, 255, 0.85);
            transition: color 0.2s ease;
        }

        .breadcrumb a:hover {
            color: #fff;
        }

        .breadcrumb-sep {
            color: rgba(255, 255, 255, 0.45);
            font-size: 12px;
        }

        .category-hero h1 {
            font-size: 36px;
            font-weight: 700;
            color: #fff;
            letter-spacing: -0.01em;
            margin-bottom: 14px;
            line-height: 1.3;
        }

        .category-hero .hero-desc {
            color: rgba(255, 255, 255, 0.85);
            font-size: 15.5px;
            line-height: 1.8;
            max-width: 700px;
        }

        /* Featured headline */
        .featured-card {
            background-color: var(--surface-white);
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border);
            transition: all 0.3s ease;
        }

        .featured-card:hover {
            box-shadow: var(--shadow-card-hover);
            border-color: var(--brand-light);
            transform: translateY(-2px);
        }

        .featured-image-wrapper {
            position: relative;
            aspect-ratio: 21/9;
            overflow: hidden;
        }

        .featured-image-wrapper img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }

        .featured-card:hover .featured-image-wrapper img {
            transform: scale(1.02);
        }

        .featured-badge {
            position: absolute;
            top: 16px;
            left: 16px;
            background-color: var(--accent);
            color: #fff;
            font-size: 12.5px;
            font-weight: 600;
            padding: 5px 12px;
            border-radius: 6px;
            letter-spacing: 0.02em;
        }

        .featured-tag {
            position: absolute;
            top: 16px;
            right: 16px;
            background-color: rgba(255, 255, 255, 0.9);
            color: var(--brand);
            font-size: 12px;
            font-weight: 600;
            padding: 4px 10px;
            border-radius: 6px;
        }

        .featured-content {
            padding: 28px 32px 32px;
        }

        .featured-content h2 {
            font-size: 24px;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: 12px;
            line-height: 1.4;
        }

        .featured-date {
            font-size: 13px;
            color: var(--text-mute);
            margin-bottom: 10px;
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .featured-excerpt {
            color: var(--text-body);
            font-size: 15px;
            line-height: 1.8;
            margin-bottom: 18px;
        }

        /* Compact list */
        .compact-item {
            background-color: var(--surface-white);
            border-radius: 14px;
            border: 1px solid var(--border);
            padding: 20px 22px;
            display: flex;
            align-items: flex-start;
            gap: 18px;
            transition: all 0.25s ease;
            margin-bottom: 12px;
        }

        .compact-item:hover {
            border-color: var(--brand-light);
            box-shadow: 0 4px 16px rgba(15, 23, 42, 0.08);
            transform: translateY(-1px);
        }

        .compact-item-number {
            flex-shrink: 0;
            width: 40px;
            height: 40px;
            border-radius: 10px;
            background-color: var(--brand-pale);
            color: var(--brand);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 17px;
        }

        .compact-item-thumb {
            flex-shrink: 0;
            width: 90px;
            height: 68px;
            border-radius: 8px;
            overflow: hidden;
        }

        .compact-item-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .compact-item-body {
            flex: 1;
            min-width: 0;
        }

        .compact-item-body h3 {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-dark);
            margin-bottom: 6px;
            line-height: 1.45;
        }

        .compact-item-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 13px;
            color: var(--text-mute);
            margin-bottom: 6px;
        }

        .compact-item-excerpt {
            font-size: 14px;
            color: var(--text-mute);
            line-height: 1.6;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .read-more-link {
            display: inline-flex;
            align-items: center;
            gap: 5px;
            font-size: 14px;
            font-weight: 600;
            color: var(--brand);
            transition: all 0.22s ease;
        }

        .read-more-link:hover {
            color: var(--brand-dark);
            gap: 8px;
        }

        /* Section heading */
        .section-heading {
            margin-bottom: 32px;
            display: flex;
            align-items: flex-end;
            justify-content: space-between;
            gap: 20px;
            flex-wrap: wrap;
        }

        .section-heading .label {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 13px;
            font-weight: 600;
            color: var(--brand);
            background-color: var(--brand-pale);
            padding: 5px 14px;
            border-radius: 20px;
            margin-bottom: 10px;
        }

        .section-heading h2 {
            font-size: 28px;
            font-weight: 700;
            color: var(--text-dark);
            letter-spacing: -0.01em;
            line-height: 1.35;
        }

        .section-heading p {
            color: var(--text-mute);
            font-size: 15px;
            margin-top: 6px;
            max-width: 560px;
        }

        /* Data strip */
        .data-strip {
            background-color: var(--surface-white);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 28px 32px;
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .data-item {
            text-align: center;
            padding: 8px 4px;
        }

        .data-item .number {
            font-size: 32px;
            font-weight: 700;
            color: var(--brand);
            letter-spacing: -0.02em;
            line-height: 1.2;
        }

        .data-item .label {
            font-size: 13.5px;
            color: var(--text-mute);
            margin-top: 6px;
        }

        /* FAQ */
        .faq-item {
            background-color: var(--surface-white);
            border: 1px solid var(--border);
            border-radius: 12px;
            margin-bottom: 12px;
            overflow: hidden;
            transition: all 0.25s ease;
        }

        .faq-item:hover {
            border-color: var(--brand-light);
        }

        .faq-item.open {
            border-color: var(--brand-light);
            background-color: #F1F5F9;
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 22px;
            cursor: pointer;
            gap: 16px;
            font-size: 15.5px;
            font-weight: 600;
            color: var(--text-dark);
            transition: all 0.2s ease;
            text-align: left;
            width: 100%;
        }

        .faq-question:hover {
            color: var(--brand);
        }

        .faq-question .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 6px;
            background-color: var(--brand-pale);
            color: var(--brand);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            transition: all 0.25s ease;
            font-weight: 700;
        }

        .faq-item.open .faq-question .faq-icon {
            transform: rotate(45deg);
            background-color: var(--brand);
            color: #fff;
        }

        .faq-answer {
            padding: 0 22px;
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.25s ease;
            color: var(--text-body);
            font-size: 15px;
            line-height: 1.8;
        }

        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 22px 18px;
        }

        /* Sidebar widgets */
        .sidebar-widget {
            background-color: var(--surface-white);
            border: 1px solid var(--border);
            border-radius: 14px;
            padding: 22px 24px;
            margin-bottom: 20px;
            box-shadow: 0 2px 10px rgba(15, 23, 42, 0.04);
        }

        .sidebar-widget h4 {
            font-size: 16px;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: 16px;
            padding-bottom: 10px;
            border-bottom: 1px solid var(--border);
        }

        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }

        .tag-cloud a {
            font-size: 13px;
            color: var(--text-body);
            background-color: var(--surface-bg);
            border: 1px solid var(--border);
            padding: 5px 12px;
            border-radius: 18px;
            transition: all 0.2s ease;
        }

        .tag-cloud a:hover {
            background-color: var(--brand-pale);
            border-color: var(--brand-light);
            color: var(--brand);
        }

        .hot-list {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .hot-list li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            padding: 10px 0;
            border-bottom: 1px solid #F1F5F9;
            font-size: 14px;
            line-height: 1.5;
        }

        .hot-list li:last-child {
            border-bottom: none;
        }

        .hot-list .rank {
            flex-shrink: 0;
            width: 22px;
            height: 22px;
            border-radius: 6px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 12px;
            font-weight: 700;
            color: #fff;
            background-color: #94A3B8;
        }

        .hot-list .rank.top-1 {
            background-color: var(--accent);
        }

        .hot-list .rank.top-2 {
            background-color: var(--accent-orange);
        }

        .hot-list .rank.top-3 {
            background-color: #F59E0B;
        }

        /* CTA section */
        .cta-section {
            background-color: var(--brand-pale);
            border-radius: var(--radius-card);
            border: 1px solid var(--brand-light);
            padding: 40px 36px;
            text-align: center;
        }

        .cta-section h2 {
            font-size: 24px;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: 10px;
        }

        .cta-section p {
            color: var(--text-mute);
            margin-bottom: 24px;
            font-size: 15px;
        }

        /* Footer */
        .site-footer {
            background-color: #0F172A;
            color: #94A3B8;
            padding-top: 56px;
            padding-bottom: 28px;
            font-size: 14px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
            gap: 36px;
            padding-bottom: 36px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

        .footer-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 19px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 14px;
        }

        .footer-brand-icon {
            width: 32px;
            height: 32px;
            border-radius: 8px;
            background: linear-gradient(135deg, #3B82F6, #2563EB);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-weight: 800;
            font-size: 15px;
        }

        .footer-desc {
            font-size: 13.5px;
            line-height: 1.7;
            color: #94A3B8;
            margin-bottom: 0;
        }

        .footer-col-title {
            font-size: 15px;
            font-weight: 700;
            color: #E2E8F0;
            margin-bottom: 16px;
        }

        .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .footer-links li {
            margin-bottom: 9px;
        }

        .footer-links a {
            color: #94A3B8;
            font-size: 13.5px;
            transition: color 0.2s ease;
        }

        .footer-links a:hover {
            color: #fff;
        }

        .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 12px 20px;
            padding-top: 24px;
            font-size: 12.5px;
            color: #64748B;
        }

        .footer-bottom a {
            color: #94A3B8;
            transition: color 0.2s ease;
        }

        .footer-bottom a:hover {
            color: #fff;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .nav-links {
                display: none;
            }

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

            .mobile-menu-btn {
                display: inline-flex;
            }

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

            .data-strip {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }

            .category-hero h1 {
                font-size: 30px;
            }

            .featured-image-wrapper {
                aspect-ratio: 16/9;
            }

            .featured-content {
                padding: 22px 24px 26px;
            }

            .featured-content h2 {
                font-size: 20px;
            }
        }

        @media (max-width: 768px) {
            .category-hero {
                min-height: 280px;
            }

            .category-hero .container {
                padding-top: 44px;
                padding-bottom: 44px;
            }

            .category-hero h1 {
                font-size: 26px;
            }

            .category-hero .hero-desc {
                font-size: 14px;
                line-height: 1.7;
            }

            .section-heading h2 {
                font-size: 22px;
            }

            .compact-item {
                flex-direction: column;
                padding: 16px 18px;
            }

            .compact-item-thumb {
                width: 100%;
                height: 160px;
                border-radius: 8px;
            }

            .compact-item-number {
                width: 32px;
                height: 32px;
                font-size: 14px;
            }

            .featured-content {
                padding: 18px 20px 22px;
            }

            .cta-section {
                padding: 28px 20px;
            }

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

        @media (max-width: 520px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }

            .data-strip {
                grid-template-columns: 1fr 1fr;
                padding: 20px;
                gap: 12px;
            }

            .data-item .number {
                font-size: 24px;
            }

            .category-hero h1 {
                font-size: 22px;
            }

            .breadcrumb {
                font-size: 12px;
            }

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

/* roulang page: category3 */
:root {
            --brand: #3B82F6;
            --brand-dark: #2563EB;
            --brand-light: #DBEAFE;
            --brand-pale: #EFF6FF;
            --accent: #F04438;
            --accent-orange: #F97316;
            --surface-bg: #F8FAFC;
            --surface-white: #FFFFFF;
            --text-dark: #0F172A;
            --text-body: #334155;
            --text-mute: #64748B;
            --border: #E2E8F0;
            --radius-card: 16px;
            --radius-btn: 10px;
            --shadow-card: 0 4px 20px rgba(15, 23, 42, 0.06);
            --shadow-card-hover: 0 10px 30px rgba(15, 23, 42, 0.12);
            --shadow-nav: 0 2px 12px rgba(15, 23, 42, 0.08);
            --shadow-glass: 0 4px 24px rgba(15, 23, 42, 0.08);
            --container-max: 1200px;
            --section-pad: 64px;
            --section-pad-mobile: 40px;
        }

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: 'PingFang SC', 'Source Han Sans SC', 'Noto Sans SC', 'Microsoft YaHei', sans-serif;
            font-size: 16px;
            line-height: 1.75;
            color: var(--text-body);
            background-color: var(--surface-bg);
            overflow-x: hidden;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

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

        a {
            color: inherit;
            text-decoration: none;
            transition: color 0.25s ease;
        }

        button,
        input,
        textarea,
        select {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }

        button {
            cursor: pointer;
            border: none;
            background: none;
        }

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

        .section-pad {
            padding-top: var(--section-pad);
            padding-bottom: var(--section-pad);
        }

        .section-pad-sm {
            padding-top: 40px;
            padding-bottom: 40px;
        }

        /* Header / Nav */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 100;
            transition: background-color 0.35s ease, box-shadow 0.35s ease, backdrop-filter 0.35s ease;
            background-color: rgba(255, 255, 255, 0.62);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid rgba(226, 232, 240, 0.7);
            box-shadow: var(--shadow-glass);
        }

        .site-header.scrolled {
            background-color: rgba(255, 255, 255, 0.98);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid #E2E8F0;
            box-shadow: var(--shadow-nav);
        }

        .nav-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
            gap: 20px;
        }

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 20px;
            color: var(--text-dark);
            letter-spacing: -0.01em;
            white-space: nowrap;
            flex-shrink: 0;
        }

        .nav-logo-icon {
            width: 34px;
            height: 34px;
            border-radius: 9px;
            background: linear-gradient(135deg, #3B82F6, #2563EB);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-weight: 800;
            font-size: 17px;
            box-shadow: 0 2px 8px rgba(59, 130, 246, 0.35);
        }

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

        .nav-link {
            display: inline-flex;
            align-items: center;
            padding: 8px 13px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-body);
            border-radius: 8px;
            transition: all 0.22s ease;
            white-space: nowrap;
            position: relative;
        }

        .nav-link:hover {
            color: var(--brand);
            background-color: var(--brand-pale);
        }

        .nav-link.active {
            color: var(--brand);
            background-color: var(--brand-pale);
            font-weight: 600;
        }

        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            border-radius: 2px;
            background-color: var(--brand);
        }

        .nav-cta {
            display: inline-flex;
            align-items: center;
            background-color: var(--brand);
            color: #fff;
            font-size: 13.5px;
            font-weight: 600;
            padding: 8px 16px;
            border-radius: var(--radius-btn);
            transition: all 0.25s ease;
            white-space: nowrap;
            box-shadow: 0 4px 14px rgba(59, 130, 246, 0.3);
            flex-shrink: 0;
        }

        .nav-cta:hover {
            background-color: var(--brand-dark);
            box-shadow: 0 6px 20px rgba(59, 130, 246, 0.4);
            color: #fff;
        }

        .nav-search-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: 9px;
            border: 1px solid var(--border);
            background-color: rgba(255, 255, 255, 0.5);
            color: var(--text-mute);
            transition: all 0.22s ease;
            flex-shrink: 0;
        }

        .nav-search-btn:hover {
            border-color: var(--brand);
            color: var(--brand);
            background-color: var(--brand-pale);
        }

        .mobile-menu-btn {
            display: none;
            width: 40px;
            height: 40px;
            border-radius: 9px;
            border: 1px solid var(--border);
            background-color: rgba(255, 255, 255, 0.5);
            color: var(--text-body);
            align-items: center;
            justify-content: center;
            transition: all 0.22s ease;
            flex-shrink: 0;
        }

        .mobile-menu-btn:hover {
            border-color: var(--brand);
            color: var(--brand);
        }

        .mobile-menu-btn svg {
            width: 22px;
            height: 22px;
        }

        /* Mobile nav panel */
        .mobile-nav-panel {
            display: none;
            position: fixed;
            top: 68px;
            left: 0;
            right: 0;
            background-color: rgba(255, 255, 255, 0.98);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border);
            box-shadow: var(--shadow-nav);
            z-index: 99;
            padding: 16px 24px 24px;
            flex-direction: column;
            gap: 6px;
        }

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

        .mobile-nav-link {
            display: block;
            padding: 12px 16px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-body);
            border-radius: 10px;
            transition: all 0.22s ease;
        }

        .mobile-nav-link:hover {
            color: var(--brand);
            background-color: var(--brand-pale);
        }

        .mobile-nav-link.active {
            color: var(--brand);
            background-color: var(--brand-pale);
            font-weight: 600;
        }

        /* Page Hero */
        .page-hero {
            position: relative;
            padding-top: 130px;
            padding-bottom: 60px;
            background-image: url('/assets/images/backpic/back-2.webp');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            min-height: 340px;
            display: flex;
            align-items: flex-end;
        }

        .page-hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(15, 23, 42, 0.55) 0%, rgba(15, 23, 42, 0.72) 45%, rgba(15, 23, 42, 0.85) 100%);
        }

        .page-hero-content {
            position: relative;
            z-index: 2;
            width: 100%;
            padding-bottom: 8px;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.7);
            margin-bottom: 14px;
            flex-wrap: wrap;
        }

        .breadcrumb a {
            color: rgba(255, 255, 255, 0.75);
            transition: color 0.22s ease;
        }

        .breadcrumb a:hover {
            color: #fff;
        }

        .breadcrumb .sep {
            color: rgba(255, 255, 255, 0.45);
        }

        .breadcrumb .current {
            color: #fff;
            font-weight: 500;
        }

        .page-hero h1 {
            font-size: 36px;
            font-weight: 700;
            color: #fff;
            letter-spacing: -0.02em;
            line-height: 1.25;
            margin-bottom: 12px;
        }

        .page-hero .hero-desc {
            font-size: 16px;
            color: rgba(255, 255, 255, 0.82);
            line-height: 1.75;
            max-width: 720px;
        }

        .hero-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-top: 16px;
        }

        .hero-tag {
            display: inline-flex;
            align-items: center;
            padding: 5px 13px;
            font-size: 12.5px;
            font-weight: 500;
            color: #fff;
            background-color: rgba(255, 255, 255, 0.18);
            border: 1px solid rgba(255, 255, 255, 0.3);
            border-radius: 999px;
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
        }

        /* Buttons */
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background-color: var(--brand);
            color: #fff;
            font-size: 14.5px;
            font-weight: 600;
            padding: 11px 24px;
            border-radius: var(--radius-btn);
            transition: all 0.25s ease;
            box-shadow: 0 4px 14px rgba(59, 130, 246, 0.3);
            border: none;
        }

        .btn-primary:hover {
            background-color: var(--brand-dark);
            box-shadow: 0 6px 22px rgba(59, 130, 246, 0.42);
            color: #fff;
            transform: translateY(-1px);
        }

        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background-color: transparent;
            color: var(--brand);
            font-size: 14px;
            font-weight: 600;
            padding: 10px 20px;
            border-radius: var(--radius-btn);
            border: 1.5px solid var(--brand);
            transition: all 0.25s ease;
        }

        .btn-secondary:hover {
            background-color: var(--brand-pale);
            border-color: var(--brand-dark);
            color: var(--brand-dark);
        }

        .btn-read-more {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            font-size: 13.5px;
            font-weight: 600;
            color: var(--brand);
            transition: all 0.22s ease;
        }

        .btn-read-more:hover {
            color: var(--brand-dark);
            gap: 8px;
        }

        .btn-read-more .arrow {
            transition: transform 0.22s ease;
        }

        .btn-read-more:hover .arrow {
            transform: translateX(3px);
        }

        /* Cards */
        .card {
            background: var(--surface-white);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border);
            transition: all 0.28s ease;
            overflow: hidden;
        }

        .card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
            border-color: var(--brand-light);
        }

        .card-cover {
            position: relative;
            aspect-ratio: 16/9;
            overflow: hidden;
            background-color: var(--brand-light);
        }

        .card-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.35s ease;
        }

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

        .card-badge {
            position: absolute;
            top: 12px;
            left: 12px;
            display: inline-flex;
            align-items: center;
            padding: 4px 10px;
            font-size: 11.5px;
            font-weight: 600;
            color: #fff;
            background-color: var(--brand);
            border-radius: 6px;
            letter-spacing: 0.02em;
        }

        .card-badge.accent {
            background-color: var(--accent);
        }

        .card-body {
            padding: 20px 22px 22px;
        }

        .card-date {
            display: flex;
            align-items: center;
            gap: 6px;
            font-size: 12.5px;
            color: var(--text-mute);
            margin-bottom: 8px;
        }

        .card-title {
            font-size: 17px;
            font-weight: 600;
            color: var(--text-dark);
            line-height: 1.45;
            margin-bottom: 8px;
            transition: color 0.22s ease;
        }

        .card:hover .card-title {
            color: var(--brand);
        }

        .card-desc {
            font-size: 14px;
            color: var(--text-body);
            line-height: 1.7;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 14px;
        }

        /* Sidebar */
        .sidebar-card {
            background: var(--surface-white);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border);
            padding: 22px;
            margin-bottom: 22px;
        }

        .sidebar-card h3 {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-dark);
            margin-bottom: 14px;
            padding-bottom: 10px;
            border-bottom: 1px solid var(--border);
            position: relative;
        }

        .sidebar-card h3::after {
            content: '';
            position: absolute;
            bottom: -1px;
            left: 0;
            width: 40px;
            height: 3px;
            border-radius: 2px;
            background-color: var(--brand);
        }

        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }

        .tag-link {
            display: inline-flex;
            align-items: center;
            padding: 5px 13px;
            font-size: 12.5px;
            font-weight: 500;
            color: var(--text-body);
            background-color: var(--surface-bg);
            border: 1px solid var(--border);
            border-radius: 999px;
            transition: all 0.22s ease;
        }

        .tag-link:hover {
            color: var(--brand);
            background-color: var(--brand-pale);
            border-color: var(--brand-light);
        }

        .rank-list {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .rank-list li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            padding: 10px 0;
            border-bottom: 1px solid var(--border);
            transition: all 0.22s ease;
        }

        .rank-list li:last-child {
            border-bottom: none;
            padding-bottom: 0;
        }

        .rank-list li:first-child {
            padding-top: 0;
        }

        .rank-number {
            flex-shrink: 0;
            width: 26px;
            height: 26px;
            border-radius: 7px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 13px;
            font-weight: 700;
            color: var(--text-mute);
            background-color: var(--surface-bg);
        }

        .rank-list li:nth-child(1) .rank-number {
            background-color: var(--accent);
            color: #fff;
        }

        .rank-list li:nth-child(2) .rank-number {
            background-color: var(--accent-orange);
            color: #fff;
        }

        .rank-list li:nth-child(3) .rank-number {
            background-color: var(--brand);
            color: #fff;
        }

        .rank-text {
            flex: 1;
            font-size: 13.5px;
            color: var(--text-body);
            line-height: 1.5;
            transition: color 0.22s ease;
            cursor: pointer;
        }

        .rank-text:hover {
            color: var(--brand);
        }

        /* Data highlight section */
        .data-section {
            background: linear-gradient(135deg, var(--brand-pale) 0%, #F0F7FF 50%, var(--surface-white) 100%);
            border-radius: var(--radius-card);
            border: 1px solid var(--brand-light);
            padding: 36px 32px;
            box-shadow: var(--shadow-card);
        }

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

        .data-item {
            text-align: center;
            padding: 18px 12px;
            background: var(--surface-white);
            border-radius: 14px;
            border: 1px solid var(--border);
            transition: all 0.25s ease;
        }

        .data-item:hover {
            border-color: var(--brand-light);
            box-shadow: var(--shadow-card);
        }

        .data-number {
            font-size: 28px;
            font-weight: 800;
            color: var(--brand);
            letter-spacing: -0.02em;
            line-height: 1.2;
        }

        .data-number.accent {
            color: var(--accent);
        }

        .data-label {
            font-size: 13px;
            color: var(--text-mute);
            margin-top: 4px;
            font-weight: 500;
        }

        /* FAQ */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .faq-item {
            background: var(--surface-white);
            border: 1px solid var(--border);
            border-radius: 12px;
            overflow: hidden;
            transition: all 0.25s ease;
        }

        .faq-item.active {
            border-color: var(--brand-light);
            background: #F1F5F9;
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 18px 20px;
            font-size: 15px;
            font-weight: 600;
            color: var(--text-dark);
            cursor: pointer;
            transition: color 0.22s ease;
            user-select: none;
        }

        .faq-question:hover {
            color: var(--brand);
        }

        .faq-item.active .faq-question {
            color: var(--brand);
            border-left: 4px solid var(--brand);
            padding-left: 16px;
        }

        .faq-toggle {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 7px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-mute);
            transition: all 0.28s ease;
        }

        .faq-item.active .faq-toggle {
            color: var(--brand);
            transform: rotate(180deg);
        }

        .faq-answer {
            display: none;
            padding: 0 20px 18px 20px;
            font-size: 14.5px;
            color: var(--text-body);
            line-height: 1.75;
        }

        .faq-item.active .faq-answer {
            display: block;
        }

        .faq-item.active .faq-answer {
            border-left: 4px solid var(--brand);
            padding-left: 16px;
        }

        /* CTA Section */
        .cta-section {
            background: linear-gradient(135deg, #1E3A5F 0%, #1D4ED8 100%);
            border-radius: 20px;
            padding: 48px 40px;
            color: #fff;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: -60px;
            right: -60px;
            width: 220px;
            height: 220px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.07);
            pointer-events: none;
        }

        .cta-section::after {
            content: '';
            position: absolute;
            bottom: -40px;
            left: 25%;
            width: 160px;
            height: 160px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.05);
            pointer-events: none;
        }

        .cta-content {
            position: relative;
            z-index: 1;
            text-align: center;
        }

        .cta-content h2 {
            font-size: 26px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 10px;
            letter-spacing: -0.01em;
        }

        .cta-content p {
            font-size: 15px;
            color: rgba(255, 255, 255, 0.8);
            max-width: 520px;
            margin: 0 auto 22px;
            line-height: 1.7;
        }

        .cta-buttons {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 14px;
            flex-wrap: wrap;
        }

        .btn-white {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background-color: #fff;
            color: var(--brand);
            font-size: 14.5px;
            font-weight: 600;
            padding: 11px 24px;
            border-radius: var(--radius-btn);
            transition: all 0.25s ease;
        }

        .btn-white:hover {
            background-color: var(--brand-pale);
            color: var(--brand-dark);
            transform: translateY(-1px);
            box-shadow: 0 6px 20px rgba(0, 0, 0, 0.2);
        }

        .btn-outline-white {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background-color: transparent;
            color: #fff;
            font-size: 14px;
            font-weight: 600;
            padding: 10px 20px;
            border-radius: var(--radius-btn);
            border: 1.5px solid rgba(255, 255, 255, 0.6);
            transition: all 0.25s ease;
        }

        .btn-outline-white:hover {
            background-color: rgba(255, 255, 255, 0.12);
            border-color: #fff;
            color: #fff;
        }

        /* Footer */
        .site-footer {
            background-color: #0F172A;
            color: #CBD5E1;
            padding-top: 56px;
            padding-bottom: 28px;
            margin-top: auto;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.8fr 1fr 1fr 1.2fr;
            gap: 36px;
            padding-bottom: 36px;
            border-bottom: 1px solid rgba(226, 232, 240, 0.12);
        }

        .footer-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 18px;
            color: #fff;
            margin-bottom: 12px;
        }

        .footer-brand-icon {
            width: 32px;
            height: 32px;
            border-radius: 8px;
            background: linear-gradient(135deg, #3B82F6, #2563EB);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-weight: 800;
            font-size: 15px;
        }

        .footer-desc {
            font-size: 13.5px;
            line-height: 1.7;
            color: #94A3B8;
            max-width: 340px;
        }

        .footer-col-title {
            font-size: 14px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 14px;
            letter-spacing: 0.02em;
        }

        .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .footer-links a {
            font-size: 13.5px;
            color: #94A3B8;
            transition: color 0.22s ease;
        }

        .footer-links a:hover {
            color: #fff;
        }

        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            padding-top: 20px;
            font-size: 12.5px;
            color: #64748B;
        }

        .footer-bottom a {
            color: #94A3B8;
            transition: color 0.22s ease;
        }

        .footer-bottom a:hover {
            color: #fff;
        }

        .footer-bottom span {
            white-space: nowrap;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .data-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }

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

            .page-hero h1 {
                font-size: 30px;
            }
        }

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

            .nav-cta {
                display: none;
            }

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

            .mobile-menu-btn {
                display: flex;
            }

            .nav-inner {
                height: 60px;
            }

            .mobile-nav-panel {
                top: 60px;
            }

            .page-hero {
                padding-top: 100px;
                padding-bottom: 44px;
                min-height: 280px;
            }

            .page-hero h1 {
                font-size: 26px;
            }

            .page-hero .hero-desc {
                font-size: 14.5px;
            }

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

            .data-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 12px;
            }

            .data-number {
                font-size: 22px;
            }

            .data-section {
                padding: 24px 18px;
            }

            .cta-section {
                padding: 36px 24px;
            }

            .cta-content h2 {
                font-size: 22px;
            }

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

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

            .footer-bottom span {
                white-space: normal;
            }

            .card-body {
                padding: 16px 18px 18px;
            }

            .card-title {
                font-size: 15.5px;
            }
        }

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

            .page-hero h1 {
                font-size: 22px;
            }

            .data-grid {
                grid-template-columns: 1fr 1fr;
                gap: 10px;
            }

            .data-number {
                font-size: 20px;
            }

            .data-label {
                font-size: 11.5px;
            }

            .hero-tags {
                gap: 6px;
            }

            .hero-tag {
                font-size: 11px;
                padding: 4px 10px;
            }
        }

/* roulang page: category5 */
:root {
            --brand: #3B82F6;
            --brand-dark: #2563EB;
            --brand-light: #DBEAFE;
            --brand-pale: #EFF6FF;
            --accent: #F04438;
            --accent-orange: #F97316;
            --surface-bg: #F8FAFC;
            --surface-white: #FFFFFF;
            --text-dark: #0F172A;
            --text-body: #334155;
            --text-mute: #64748B;
            --border: #E2E8F0;
            --radius-card: 16px;
            --radius-btn: 10px;
            --shadow-card: 0 4px 20px rgba(15, 23, 42, 0.06);
            --shadow-card-hover: 0 10px 30px rgba(15, 23, 42, 0.12);
            --shadow-nav: 0 2px 12px rgba(15, 23, 42, 0.08);
            --shadow-glass: 0 4px 24px rgba(15, 23, 42, 0.08);
            --container-max: 1200px;
            --section-pad: 80px;
            --section-pad-mobile: 48px;
        }
        :root {
            --section-pad: 48px;
            --section-pad-mobile: 40px;
        }

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        body {
            font-family: 'PingFang SC', 'Source Han Sans SC', 'Noto Sans SC', 'Microsoft YaHei', sans-serif;
            font-size: 16px;
            line-height: 1.75;
            color: var(--text-body);
            background-color: var(--surface-bg);
            overflow-x: hidden;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: color 0.25s ease;
        }
        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }
        button {
            cursor: pointer;
            border: none;
            background: none;
        }
        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }
        .section-pad {
            padding-top: var(--section-pad);
            padding-bottom: var(--section-pad);
        }
        .section-pad-sm {
            padding-top: 48px;
            padding-bottom: 48px;
        }

        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 100;
            transition: background-color 0.35s ease, box-shadow 0.35s ease, backdrop-filter 0.35s ease;
            background-color: rgba(255, 255, 255, 0.62);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid rgba(226, 232, 240, 0.7);
            box-shadow: var(--shadow-glass);
        }
        .site-header.scrolled {
            background-color: rgba(255, 255, 255, 0.98);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid #E2E8F0;
            box-shadow: var(--shadow-nav);
        }
        .nav-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
            gap: 20px;
        }
        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 20px;
            color: var(--text-dark);
            letter-spacing: -0.01em;
            white-space: nowrap;
        }
        .nav-logo-icon {
            width: 34px;
            height: 34px;
            border-radius: 9px;
            background: linear-gradient(135deg, #3B82F6, #2563EB);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-weight: 800;
            font-size: 17px;
            box-shadow: 0 2px 8px rgba(59, 130, 246, 0.35);
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .nav-link {
            display: inline-flex;
            align-items: center;
            padding: 8px 14px;
            font-size: 14.5px;
            font-weight: 500;
            color: var(--text-body);
            border-radius: 8px;
            transition: all 0.22s ease;
            white-space: nowrap;
            position: relative;
        }
        .nav-link:hover {
            color: var(--brand);
            background-color: var(--brand-pale);
        }
        .nav-link.active {
            color: var(--brand);
            background-color: var(--brand-pale);
            font-weight: 600;
        }
        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            border-radius: 2px;
            background-color: var(--brand);
        }
        .nav-cta {
            display: inline-flex;
            align-items: center;
            background-color: var(--brand);
            color: #fff;
            font-size: 14px;
            font-weight: 600;
            padding: 9px 18px;
            border-radius: var(--radius-btn);
            transition: all 0.25s ease;
            white-space: nowrap;
            box-shadow: 0 4px 14px rgba(59, 130, 246, 0.3);
        }
        .nav-cta:hover {
            background-color: var(--brand-dark);
            box-shadow: 0 6px 20px rgba(59, 130, 246, 0.4);
        }
        .nav-search-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: 9px;
            border: 1px solid var(--border);
            background-color: rgba(255, 255, 255, 0.5);
            color: var(--text-mute);
            transition: all 0.22s ease;
        }
        .nav-search-btn:hover {
            border-color: var(--brand);
            color: var(--brand);
            background-color: var(--brand-pale);
        }
        .mobile-menu-btn {
            display: none;
            width: 40px;
            height: 40px;
            border-radius: 9px;
            border: 1px solid var(--border);
            background-color: rgba(255, 255, 255, 0.6);
            align-items: center;
            justify-content: center;
            flex-direction: column;
            gap: 5px;
            transition: all 0.25s ease;
        }
        .mobile-menu-btn span {
            display: block;
            width: 18px;
            height: 2px;
            background-color: var(--text-dark);
            border-radius: 1px;
            transition: all 0.3s ease;
        }
        .mobile-menu-btn.active span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }
        .mobile-menu-btn.active span:nth-child(2) {
            opacity: 0;
        }
        .mobile-menu-btn.active span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        .mobile-menu-panel {
            display: none;
            position: fixed;
            top: 68px;
            left: 0;
            right: 0;
            background-color: #fff;
            border-bottom: 1px solid var(--border);
            box-shadow: 0 12px 30px rgba(15, 23, 42, 0.1);
            z-index: 99;
            padding: 16px 24px 20px;
            flex-direction: column;
            gap: 4px;
        }
        .mobile-menu-panel.open {
            display: flex;
        }
        .mobile-menu-panel .nav-link {
            padding: 12px 14px;
            font-size: 16px;
            width: 100%;
        }
        .mobile-menu-panel .nav-cta {
            margin-top: 8px;
            justify-content: center;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 24px;
            border-radius: var(--radius-btn);
            font-size: 15px;
            font-weight: 600;
            transition: all 0.25s ease;
            white-space: nowrap;
        }
        .btn-primary {
            background-color: var(--brand);
            color: #fff;
            box-shadow: 0 4px 14px rgba(59, 130, 246, 0.3);
        }
        .btn-primary:hover {
            background-color: var(--brand-dark);
            box-shadow: 0 6px 20px rgba(59, 130, 246, 0.4);
            transform: translateY(-1px);
        }
        .btn-secondary {
            border: 1.5px solid var(--brand);
            color: var(--brand);
            background-color: transparent;
        }
        .btn-secondary:hover {
            background-color: var(--brand-pale);
            border-color: var(--brand-dark);
            color: var(--brand-dark);
            transform: translateY(-1px);
        }
        .btn-ghost {
            color: var(--text-mute);
            border: 1px solid var(--border);
            background-color: #fff;
        }
        .btn-ghost:hover {
            border-color: var(--brand);
            color: var(--brand);
            background-color: var(--brand-pale);
        }
        .btn-sm {
            padding: 8px 16px;
            font-size: 13.5px;
        }
        .btn-lg {
            padding: 14px 28px;
            font-size: 16px;
        }

        .card {
            background-color: var(--surface-white);
            border-radius: var(--radius-card);
            border: 1px solid var(--border);
            box-shadow: var(--shadow-card);
            padding: 28px;
            transition: all 0.28s ease;
        }
        .card:hover {
            box-shadow: var(--shadow-card-hover);
            border-color: #CBD5E1;
            transform: translateY(-2px);
        }

        .badge {
            display: inline-flex;
            align-items: center;
            padding: 4px 12px;
            border-radius: 6px;
            font-size: 12.5px;
            font-weight: 600;
            letter-spacing: 0.01em;
        }
        .badge-blue {
            background-color: var(--brand-pale);
            color: var(--brand);
        }
        .badge-red {
            background-color: #FEF2F2;
            color: var(--accent);
        }
        .badge-orange {
            background-color: #FFF7ED;
            color: var(--accent-orange);
        }
        .badge-green {
            background-color: #F0FDF4;
            color: #16A34A;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 6px;
            font-size: 13.5px;
            color: var(--text-mute);
        }
        .breadcrumb a {
            color: var(--text-mute);
            transition: color 0.2s ease;
        }
        .breadcrumb a:hover {
            color: var(--brand);
        }
        .breadcrumb .sep {
            color: #94A3B8;
        }
        .breadcrumb .current {
            color: var(--text-body);
            font-weight: 500;
        }

        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            color: var(--brand);
            margin-bottom: 12px;
        }
        .section-label::before {
            content: '';
            width: 18px;
            height: 2px;
            border-radius: 1px;
            background-color: var(--brand);
        }
        .section-title {
            font-size: 28px;
            font-weight: 700;
            color: var(--text-dark);
            letter-spacing: -0.01em;
            line-height: 1.35;
            margin-bottom: 14px;
        }
        .section-desc {
            font-size: 16px;
            color: var(--text-mute);
            line-height: 1.8;
            max-width: 720px;
        }

        .hero-bg {
            background-image: url('/assets/images/backpic/back-3.webp');
            background-size: cover;
            background-position: center;
            position: relative;
        }
        .hero-bg::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(to bottom, rgba(15, 23, 42, 0.72) 0%, rgba(15, 23, 42, 0.55) 60%, rgba(15, 23, 42, 0.72) 100%);
        }
        .hero-content {
            position: relative;
            z-index: 2;
            padding-top: 120px;
            padding-bottom: 80px;
        }
        .hero-breadcrumb-section {
            margin-bottom: 24px;
        }
        .hero-breadcrumb-section .breadcrumb a,
        .hero-breadcrumb-section .breadcrumb .sep,
        .hero-breadcrumb-section .breadcrumb .current {
            color: rgba(255, 255, 255, 0.75);
        }
        .hero-breadcrumb-section .breadcrumb a:hover {
            color: #fff;
        }
        .hero-breadcrumb-section .breadcrumb .current {
            color: #fff;
            font-weight: 600;
        }

        .data-stat-card {
            background: var(--surface-white);
            border-radius: var(--radius-card);
            border: 1px solid var(--border);
            box-shadow: var(--shadow-card);
            padding: 24px 22px;
            text-align: left;
            transition: all 0.28s ease;
            position: relative;
            overflow: hidden;
        }
        .data-stat-card::after {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--brand), var(--brand-light));
        }
        .data-stat-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-3px);
        }
        .data-stat-number {
            font-size: 42px;
            font-weight: 700;
            color: var(--text-dark);
            letter-spacing: -0.02em;
            line-height: 1.15;
            margin-bottom: 4px;
        }
        .data-stat-number .unit {
            font-size: 18px;
            font-weight: 500;
            color: var(--text-mute);
            margin-left: 4px;
        }
        .data-stat-label {
            font-size: 14px;
            color: var(--text-mute);
            font-weight: 500;
        }
        .data-stat-check {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            font-size: 12px;
            font-weight: 600;
            color: #16A34A;
            margin-top: 8px;
        }
        .data-stat-check.orange {
            color: var(--accent-orange);
        }

        .data-table-wrap {
            overflow-x: auto;
            -webkit-overflow-scrolling: touch;
        }
        .data-table {
            width: 100%;
            border-collapse: collapse;
            font-size: 14.5px;
            min-width: 680px;
        }
        .data-table thead th {
            background-color: var(--brand-pale);
            color: var(--text-dark);
            font-weight: 600;
            font-size: 13.5px;
            text-align: left;
            padding: 14px 16px;
            border-bottom: 2px solid #D1D5DB;
            white-space: nowrap;
        }
        .data-table tbody td {
            padding: 13px 16px;
            border-bottom: 1px solid var(--border);
            color: var(--text-body);
            white-space: nowrap;
        }
        .data-table tbody tr {
            transition: background-color 0.2s ease;
        }
        .data-table tbody tr:hover {
            background-color: var(--brand-pale);
        }
        .data-table .rank-cell {
            font-weight: 700;
            color: var(--text-dark);
            text-align: center;
        }
        .data-table .rank-1 {
            color: var(--brand);
        }
        .data-table .rank-2 {
            color: #6366F1;
        }
        .data-table .rank-3 {
            color: var(--accent-orange);
        }
        .data-table .highlight-team {
            font-weight: 600;
            color: var(--text-dark);
        }
        .data-table .trend-up {
            color: #16A34A;
            font-weight: 600;
        }
        .data-table .trend-down {
            color: var(--accent);
            font-weight: 600;
        }

        .trend-bars {
            display: flex;
            align-items: flex-end;
            gap: 12px;
            height: 160px;
            padding-top: 20px;
        }
        .trend-bar-group {
            display: flex;
            flex-direction: column;
            align-items: center;
            flex: 1;
            gap: 8px;
        }
        .trend-bar {
            width: 100%;
            max-width: 48px;
            border-radius: 6px 6px 0 0;
            background: linear-gradient(180deg, #3B82F6, #2563EB);
            position: relative;
            transition: all 0.3s ease;
            min-height: 8px;
        }
        .trend-bar:hover {
            background: linear-gradient(180deg, #2563EB, #1D4ED8);
            transform: scaleY(1.02);
        }
        .trend-bar.orange {
            background: linear-gradient(180deg, #F97316, #EA580C);
        }
        .trend-bar.red {
            background: linear-gradient(180deg, #F04438, #DC2626);
        }
        .trend-bar-label {
            font-size: 11.5px;
            color: var(--text-mute);
            white-space: nowrap;
        }
        .trend-bar-value {
            font-size: 12px;
            font-weight: 600;
            color: var(--text-dark);
        }

        .report-card {
            display: flex;
            flex-direction: column;
            gap: 16px;
            height: 100%;
        }
        .report-card-img {
            border-radius: 12px;
            overflow: hidden;
            aspect-ratio: 16/9;
            background-color: var(--brand-pale);
        }
        .report-card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.35s ease;
        }
        .report-card:hover .report-card-img img {
            transform: scale(1.03);
        }

        .news-list-item {
            display: flex;
            gap: 20px;
            padding: 20px 0;
            border-bottom: 1px solid var(--border);
            transition: all 0.25s ease;
        }
        .news-list-item:last-child {
            border-bottom: none;
        }
        .news-list-item:hover {
            padding-left: 8px;
        }
        .news-thumb {
            width: 120px;
            height: 80px;
            flex-shrink: 0;
            border-radius: 8px;
            overflow: hidden;
            background-color: var(--brand-pale);
        }
        .news-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .news-item-content {
            flex: 1;
        }
        .news-item-meta {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 13px;
            color: var(--text-mute);
            margin-bottom: 6px;
        }
        .news-item-title {
            font-size: 17px;
            font-weight: 600;
            color: var(--text-dark);
            line-height: 1.4;
            margin-bottom: 6px;
            transition: color 0.2s ease;
        }
        .news-list-item:hover .news-item-title {
            color: var(--brand);
        }
        .news-item-summary {
            font-size: 14px;
            color: var(--text-mute);
            line-height: 1.65;
        }
        .read-more-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            font-weight: 600;
            color: var(--brand);
            transition: gap 0.25s ease;
        }
        .read-more-link:hover {
            gap: 10px;
            color: var(--brand-dark);
        }

        .faq-item {
            border: 1px solid var(--border);
            border-radius: 12px;
            margin-bottom: 12px;
            overflow: hidden;
            transition: all 0.25s ease;
            background-color: var(--surface-white);
        }
        .faq-item:hover {
            border-color: #CBD5E1;
        }
        .faq-item.active {
            border-color: var(--brand);
            background-color: #F1F5F9;
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 20px;
            cursor: pointer;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-dark);
            gap: 16px;
            user-select: none;
            width: 100%;
            text-align: left;
            transition: all 0.2s ease;
        }
        .faq-question:hover {
            color: var(--brand);
        }
        .faq-item.active .faq-question {
            color: var(--brand);
            border-left: 3px solid var(--brand);
        }
        .faq-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 28px;
            height: 28px;
            border-radius: 7px;
            border: 1px solid var(--border);
            flex-shrink: 0;
            transition: all 0.3s ease;
            color: var(--text-mute);
            font-size: 18px;
            font-weight: 500;
        }
        .faq-item.active .faq-icon {
            border-color: var(--brand);
            color: var(--brand);
            background-color: var(--brand-pale);
            transform: rotate(45deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
            padding: 0 20px;
            font-size: 15px;
            color: var(--text-body);
            line-height: 1.8;
        }
        .faq-item.active .faq-answer {
            max-height: 300px;
            padding: 0 20px 20px 56px;
        }

        .form-group {
            margin-bottom: 18px;
        }
        .form-label {
            display: block;
            font-size: 14px;
            font-weight: 600;
            color: var(--text-dark);
            margin-bottom: 6px;
        }
        .form-input {
            width: 100%;
            padding: 12px 16px;
            border: 1.5px solid #CBD5E1;
            border-radius: var(--radius-btn);
            font-size: 15px;
            color: var(--text-dark);
            background-color: #fff;
            transition: all 0.25s ease;
            outline: none;
        }
        .form-input:focus {
            border-color: var(--brand);
            box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.15);
        }
        .form-textarea {
            resize: vertical;
            min-height: 100px;
        }

        .chart-simple-bar {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 12px;
        }
        .chart-simple-label {
            font-size: 14px;
            color: var(--text-body);
            width: 90px;
            flex-shrink: 0;
            text-align: right;
            font-weight: 500;
        }
        .chart-simple-track {
            flex: 1;
            height: 22px;
            background-color: #F1F5F9;
            border-radius: 6px;
            overflow: hidden;
        }
        .chart-simple-fill {
            height: 100%;
            border-radius: 6px;
            background: linear-gradient(90deg, var(--brand), var(--brand-dark));
            transition: width 0.5s ease;
            position: relative;
        }
        .chart-simple-fill.red {
            background: linear-gradient(90deg, #F87171, #DC2626);
        }
        .chart-simple-fill.orange {
            background: linear-gradient(90deg, #FB923C, #EA580C);
        }
        .chart-simple-fill.green {
            background: linear-gradient(90deg, #4ADE80, #16A34A);
        }
        .chart-simple-value {
            font-size: 13px;
            font-weight: 600;
            color: var(--text-dark);
            width: 50px;
            flex-shrink: 0;
        }

        .site-footer {
            background-color: var(--text-dark);
            color: #CBD5E1;
            padding: 56px 0 24px;
            margin-top: 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.2fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 14px;
            font-weight: 700;
            font-size: 18px;
            color: #fff;
        }
        .footer-brand-icon {
            width: 30px;
            height: 30px;
            border-radius: 8px;
            background: linear-gradient(135deg, #3B82F6, #2563EB);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-weight: 800;
            font-size: 15px;
        }
        .footer-desc {
            font-size: 14px;
            line-height: 1.7;
            color: #94A3B8;
        }
        .footer-col-title {
            font-size: 14px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 14px;
            letter-spacing: 0.03em;
        }
        .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .footer-links a {
            font-size: 14px;
            color: #94A3B8;
            transition: color 0.2s ease;
        }
        .footer-links a:hover {
            color: #fff;
        }
        .footer-bottom {
            border-top: 1px solid #334155;
            padding-top: 20px;
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            font-size: 13px;
            color: #64748B;
            justify-content: space-between;
            align-items: center;
        }
        .footer-bottom a {
            color: #94A3B8;
            transition: color 0.2s ease;
        }
        .footer-bottom a:hover {
            color: #fff;
        }

        .divider {
            height: 1px;
            background: var(--border);
            width: 100%;
        }

        .data-highlight-block {
            background: var(--brand-pale);
            border-radius: var(--radius-card);
            padding: 24px;
            border-left: 4px solid var(--brand);
        }

        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
            .nav-links {
                gap: 2px;
            }
            .nav-link {
                padding: 8px 10px;
                font-size: 13.5px;
            }
        }
        @media (max-width: 768px) {
            .nav-links {
                display: none;
            }
            .mobile-menu-btn {
                display: flex;
            }
            .nav-cta {
                display: none;
            }
            .nav-search-btn {
                display: none;
            }
            .hero-content {
                padding-top: 96px;
                padding-bottom: 56px;
            }
            .section-title {
                font-size: 24px;
            }
            .section-pad {
                padding-top: 48px;
                padding-bottom: 48px;
            }
            .news-list-item {
                flex-direction: column;
                gap: 12px;
            }
            .news-thumb {
                width: 100%;
                height: 160px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
                gap: 8px;
            }
            .trend-bars {
                gap: 6px;
            }
            .chart-simple-label {
                width: 60px;
                font-size: 12px;
            }
            .data-stat-number {
                font-size: 32px;
            }
        }
        @media (max-width: 520px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
            .card {
                padding: 20px;
            }
            .section-title {
                font-size: 21px;
            }
            .section-desc {
                font-size: 15px;
            }
            .hero-content {
                padding-top: 80px;
                padding-bottom: 40px;
            }
            .breadcrumb {
                font-size: 12.5px;
            }
        }