/* roulang page: index */
:root {
            --primary: #1F5EFF;
            --primary-hover: #0F45D6;
            --secondary: #00D9C0;
            --gold: #FFB400;
            --bg: #F5F8FC;
            --card-bg: #FFFFFF;
            --secondary-bg: #EAF0FA;
            --dark: #0E1A2F;
            --text-primary: #1B2A3F;
            --text-secondary: #5C6B85;
            --border: #E3EAF5;
            --radius: 14px;
            --radius-lg: 18px;
            --radius-sm: 8px;
            --shadow: 0 4px 16px rgba(16, 42, 90, 0.06);
            --shadow-hover: 0 12px 28px rgba(16, 42, 90, 0.12);
            --transition: 0.2s ease;
            --section-pad: 76px 0;
            --font-family: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
        }

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

        a {
            text-decoration: none;
            color: var(--primary);
            transition: color var(--transition);
        }

        a:hover,
        a:focus {
            color: var(--primary-hover);
            outline: none;
        }

        a:focus-visible {
            outline: 3px solid rgba(31, 94, 255, 0.25);
            outline-offset: 2px;
            border-radius: 4px;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-sm);
        }

        button,
        input {
            font-family: var(--font-family);
            font-size: 15px;
        }

        .row {
            max-width: 1200px;
        }

        .container-custom {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

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

        .section-alt {
            background: var(--secondary-bg);
        }

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

        .section-title {
            font-size: 30px;
            font-weight: 700;
            line-height: 1.3;
            color: var(--dark);
            margin-bottom: 14px;
            position: relative;
            padding-left: 16px;
        }

        .section-title::before {
            content: '';
            position: absolute;
            left: 0;
            top: 50%;
            transform: translateY(-50%);
            width: 4px;
            height: 24px;
            background: var(--primary);
            border-radius: 2px;
        }

        .section-subtitle {
            font-size: 16px;
            color: var(--text-secondary);
            margin-bottom: 36px;
            max-width: 720px;
            line-height: 1.7;
        }

        .tag {
            display: inline-block;
            background: rgba(0, 217, 192, 0.12);
            color: #009e8f;
            font-size: 12px;
            font-weight: 500;
            letter-spacing: 0.5px;
            padding: 4px 12px;
            border-radius: 999px;
            margin-right: 6px;
            margin-bottom: 6px;
        }

        .badge-gold {
            display: inline-block;
            background: var(--gold);
            color: var(--dark);
            font-size: 12px;
            font-weight: 600;
            padding: 3px 10px;
            border-radius: 999px;
            letter-spacing: 0.5px;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            border-radius: 999px;
            padding: 12px 26px;
            font-size: 15px;
            font-weight: 600;
            border: none;
            cursor: pointer;
            transition: all var(--transition);
            text-decoration: none;
            line-height: 1.4;
            white-space: nowrap;
        }

        .btn:focus-visible {
            outline: 3px solid rgba(31, 94, 255, 0.25);
            outline-offset: 3px;
        }

        .btn-primary {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 14px rgba(31, 94, 255, 0.25);
        }

        .btn-primary:hover,
        .btn-primary:focus {
            background: var(--primary-hover);
            color: #fff;
            transform: scale(0.98);
            box-shadow: 0 6px 20px rgba(31, 94, 255, 0.35);
        }

        .btn-primary:active {
            transform: scale(0.97);
            box-shadow: 0 2px 8px rgba(31, 94, 255, 0.2);
        }

        .btn-secondary {
            background: #fff;
            color: var(--primary);
            border: 1px solid var(--primary);
        }

        .btn-secondary:hover,
        .btn-secondary:focus {
            background: var(--secondary-bg);
            color: var(--primary-hover);
            border-color: var(--primary-hover);
        }

        .btn-ghost {
            background: transparent;
            color: #fff;
            border: 1px solid rgba(255, 255, 255, 0.7);
        }

        .btn-ghost:hover,
        .btn-ghost:focus {
            background: rgba(255, 255, 255, 0.12);
            color: #fff;
        }

        .card {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            padding: 24px;
            transition: all var(--transition);
            height: 100%;
        }

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

        .card-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            margin-bottom: 16px;
            background: rgba(31, 94, 255, 0.08);
            color: var(--primary);
            flex-shrink: 0;
        }

        .card-icon.teal {
            background: rgba(0, 217, 192, 0.12);
            color: #009e8f;
        }

        .card-icon.gold {
            background: rgba(255, 180, 0, 0.15);
            color: #d18f00;
        }

        .card-title {
            font-size: 18px;
            font-weight: 600;
            line-height: 1.4;
            margin-bottom: 8px;
            color: var(--text-primary);
        }

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

        .data-card {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            padding: 20px 24px;
            position: relative;
            transition: all var(--transition);
        }

        .data-card::before {
            content: '';
            position: absolute;
            left: 0;
            top: 20%;
            bottom: 20%;
            width: 4px;
            background: var(--primary);
            border-radius: 0 2px 2px 0;
        }

        .data-card .data-value {
            font-size: 26px;
            font-weight: 700;
            color: var(--primary);
            line-height: 1.2;
        }

        .data-card .data-unit {
            font-size: 13px;
            font-weight: 500;
            color: var(--text-secondary);
            margin-left: 4px;
        }

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

        .list-card {
            display: flex;
            gap: 16px;
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            padding: 16px;
            transition: all var(--transition);
            margin-bottom: 12px;
            align-items: center;
        }

        .list-card:hover {
            box-shadow: var(--shadow-hover);
            border-color: var(--primary);
            transform: translateY(-1px);
        }

        .list-card img {
            width: 100px;
            height: 76px;
            object-fit: cover;
            border-radius: 10px;
            flex-shrink: 0;
        }

        .list-card .list-info {
            flex: 1;
            min-width: 0;
        }

        .list-card .list-title {
            font-size: 16px;
            font-weight: 600;
            line-height: 1.45;
            color: var(--text-primary);
            margin-bottom: 4px;
        }

        .list-card .list-summary {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.6;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .list-card .list-meta {
            font-size: 12px;
            color: var(--text-secondary);
            margin-top: 4px;
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
        }

        /* Navigation */
        .nav-wrapper {
            padding: 12px 0 0;
            position: relative;
            z-index: 100;
        }

        .nav-card {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            box-shadow: 0 6px 24px rgba(16, 42, 90, 0.08);
            padding: 0 20px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            min-height: 64px;
            transition: all var(--transition);
        }

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 700;
            color: var(--dark);
            text-decoration: none;
            letter-spacing: 0.5px;
        }

        .nav-logo:hover,
        .nav-logo:focus {
            color: var(--primary);
        }

        .nav-logo .logo-icon {
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: var(--primary);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
        }

        .nav-menu {
            display: flex;
            align-items: center;
            gap: 6px;
            list-style: none;
        }

        .nav-menu li {
            margin: 0;
        }

        .nav-menu a {
            display: flex;
            align-items: center;
            gap: 6px;
            padding: 8px 16px;
            border-radius: 10px;
            font-size: 14px;
            font-weight: 600;
            color: var(--text-primary);
            transition: all var(--transition);
            text-decoration: none;
            letter-spacing: 0.3px;
            white-space: nowrap;
        }

        .nav-menu a:hover,
        .nav-menu a:focus {
            background: var(--secondary-bg);
            color: var(--primary);
        }

        .nav-menu a.active {
            background: rgba(31, 94, 255, 0.1);
            color: var(--primary);
        }

        .nav-menu a .nav-icon {
            font-size: 16px;
            color: var(--primary);
            width: 20px;
            text-align: center;
        }

        .nav-cta {
            flex-shrink: 0;
            margin-left: 12px;
        }

        .nav-cta .btn {
            padding: 9px 18px;
            font-size: 14px;
        }

        .hamburger {
            display: none;
            background: none;
            border: none;
            cursor: pointer;
            font-size: 24px;
            color: var(--text-primary);
            padding: 6px;
            border-radius: 8px;
            transition: background var(--transition);
        }

        .hamburger:hover,
        .hamburger:focus {
            background: var(--secondary-bg);
            outline: none;
        }

        .mobile-nav {
            display: none;
            flex-direction: column;
            gap: 4px;
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            box-shadow: var(--shadow-hover);
            padding: 16px;
            margin-top: 8px;
        }

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

        .mobile-nav a {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 10px 14px;
            border-radius: 10px;
            font-size: 14px;
            font-weight: 600;
            color: var(--text-primary);
            text-decoration: none;
            transition: all var(--transition);
        }

        .mobile-nav a:hover,
        .mobile-nav a:focus {
            background: var(--secondary-bg);
            color: var(--primary);
        }

        .mobile-nav a.active {
            background: rgba(31, 94, 255, 0.1);
            color: var(--primary);
        }

        .mobile-nav a i {
            width: 20px;
            text-align: center;
            color: var(--primary);
        }

        /* Hero */
        .hero {
            padding: 50px 0 40px;
            background: linear-gradient(180deg, #f5f8fc 0%, #eaf0fa 55%, #dfe9f7 100%);
            position: relative;
            overflow: hidden;
        }

        .hero::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 8%;
            background: linear-gradient(180deg, rgba(14, 26, 47, 0) 0%, rgba(14, 26, 47, 0.06) 100%);
            pointer-events: none;
            z-index: 1;
        }

        .hero-content {
            position: relative;
            z-index: 2;
            text-align: center;
        }

        .hero .section-tag {
            display: inline-block;
            background: rgba(31, 94, 255, 0.1);
            color: var(--primary);
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.8px;
            padding: 6px 16px;
            border-radius: 999px;
            margin-bottom: 16px;
        }

        .hero h1 {
            font-size: 38px;
            font-weight: 700;
            line-height: 1.2;
            color: var(--dark);
            margin-bottom: 18px;
            letter-spacing: 0.5px;
        }

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

        .hero-subtitle {
            font-size: 16px;
            line-height: 1.75;
            color: var(--text-secondary);
            max-width: 720px;
            margin: 0 auto 28px;
            text-align: center;
        }

        .hero-search-wrapper {
            max-width: 580px;
            margin: 0 auto 20px;
            position: relative;
        }

        .hero-search {
            display: flex;
            align-items: center;
            background: #fff;
            border: 2px solid var(--border);
            border-radius: 999px;
            padding: 8px 8px 8px 20px;
            box-shadow: 0 8px 28px rgba(16, 42, 90, 0.1);
            transition: all var(--transition);
        }

        .hero-search:focus-within {
            border-color: var(--primary);
            box-shadow: 0 8px 32px rgba(31, 94, 255, 0.15);
        }

        .hero-search i {
            color: var(--text-secondary);
            font-size: 16px;
            margin-right: 10px;
        }

        .hero-search input {
            flex: 1;
            border: none;
            outline: none;
            background: transparent;
            font-size: 15px;
            color: var(--text-primary);
            padding: 6px 0;
            min-width: 0;
        }

        .hero-search input::placeholder {
            color: #9aa7bd;
        }

        .hero-search .btn {
            padding: 10px 22px;
            font-size: 14px;
            flex-shrink: 0;
        }

        .hero-chips {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 8px;
            margin-bottom: 36px;
        }

        .hero-chips .chip {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: 999px;
            padding: 6px 16px;
            font-size: 13px;
            color: var(--text-secondary);
            cursor: pointer;
            transition: all var(--transition);
            text-decoration: none;
            font-weight: 500;
        }

        .hero-chips .chip:hover,
        .hero-chips .chip:focus {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
            outline: none;
        }

        .hero-data-row {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            justify-content: center;
            z-index: 3;
            position: relative;
            margin-top: 8px;
        }

        .hero-data-row .data-card {
            min-width: 150px;
            flex: 0 0 auto;
            text-align: left;
            box-shadow: 0 6px 20px rgba(16, 42, 90, 0.08);
        }

        /* Calendar */
        .calendar-grid {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }

        .calendar-card {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            padding: 20px;
            flex: 1 1 200px;
            min-width: 180px;
            transition: all var(--transition);
        }

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

        .calendar-date {
            font-size: 20px;
            font-weight: 700;
            color: var(--dark);
            margin-bottom: 4px;
        }

        .calendar-event {
            font-size: 14px;
            color: var(--text-primary);
            font-weight: 600;
            margin-bottom: 4px;
        }

        .calendar-time {
            font-size: 13px;
            color: var(--text-secondary);
        }

        .calendar-tag {
            display: inline-block;
            background: rgba(0, 217, 192, 0.12);
            color: #009e8f;
            font-size: 11px;
            font-weight: 600;
            padding: 3px 10px;
            border-radius: 999px;
            margin-top: 8px;
        }

        /* Topics / service grid */
        .topics-grid {
            display: flex;
            gap: 18px;
            flex-wrap: wrap;
        }

        .topic-card {
            flex: 1 1 280px;
            min-width: 240px;
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            padding: 24px;
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

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

        .topic-card .card-icon {
            margin-bottom: 6px;
        }

        .topic-card h3 {
            font-size: 17px;
            font-weight: 600;
            color: var(--text-primary);
            line-height: 1.4;
            margin: 0;
        }

        .topic-card p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.65;
            margin: 0;
        }

        /* Insights */
        .insight-bar {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            padding: 22px 24px;
            margin-bottom: 14px;
            transition: all var(--transition);
        }

        .insight-bar:hover {
            box-shadow: var(--shadow-hover);
            border-color: var(--primary);
        }

        .insight-bar .insight-label {
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 14px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 8px;
            flex-wrap: wrap;
            gap: 8px;
        }

        .insight-bar .insight-value {
            color: var(--primary);
            font-weight: 700;
        }

        .insight-track {
            height: 8px;
            background: var(--secondary-bg);
            border-radius: 999px;
            overflow: hidden;
        }

        .insight-fill {
            height: 100%;
            border-radius: 999px;
            background: linear-gradient(90deg, var(--primary), var(--secondary));
            transition: width 0.6s ease;
        }

        .insight-fill.gold-fill {
            background: linear-gradient(90deg, var(--gold), #ffd966);
        }

        /* Brand intro */
        .brand-intro-card {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow);
            padding: 36px 40px;
            position: relative;
            overflow: hidden;
        }

        .brand-intro-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: linear-gradient(90deg, var(--primary), var(--secondary), var(--gold));
        }

        .brand-intro-card .section-tag {
            display: inline-block;
            background: rgba(31, 94, 255, 0.08);
            color: var(--primary);
            font-size: 12px;
            font-weight: 600;
            letter-spacing: 0.8px;
            padding: 4px 14px;
            border-radius: 999px;
            margin-bottom: 14px;
        }

        .brand-intro-card h2 {
            font-size: 24px;
            font-weight: 700;
            color: var(--dark);
            margin-bottom: 16px;
            line-height: 1.3;
        }

        .brand-intro-card p {
            font-size: 15px;
            color: var(--text-primary);
            line-height: 1.85;
            margin-bottom: 14px;
            text-align: justify;
        }

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

        /* Process steps */
        .steps-grid {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
            counter-reset: step;
        }

        .step-card {
            flex: 1 1 200px;
            min-width: 170px;
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            padding: 24px 20px;
            text-align: center;
            transition: all var(--transition);
            position: relative;
        }

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

        .step-card .step-number {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            font-size: 18px;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 12px;
        }

        .step-card h3 {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 6px;
            line-height: 1.4;
        }

        .step-card p {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.6;
            margin: 0;
        }

        /* Media showcase */
        .media-grid {
            display: flex;
            gap: 18px;
            flex-wrap: wrap;
        }

        .media-card {
            flex: 1 1 300px;
            min-width: 260px;
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            overflow: hidden;
            transition: all var(--transition);
        }

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

        .media-card img {
            width: 100%;
            height: 180px;
            object-fit: cover;
            border-radius: 0;
        }

        .media-card .media-body {
            padding: 18px 20px;
        }

        .media-card h3 {
            font-size: 17px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 6px;
            line-height: 1.4;
        }

        .media-card p {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.65;
            margin: 0;
        }

        /* Team showcase */
        .team-grid {
            display: flex;
            gap: 18px;
            flex-wrap: wrap;
        }

        .team-card {
            flex: 1 1 240px;
            min-width: 200px;
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            overflow: hidden;
            transition: all var(--transition);
        }

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

        .team-card img {
            width: 100%;
            height: 140px;
            object-fit: cover;
            border-radius: 0;
        }

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

        .team-card h3 {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 4px;
        }

        .team-card .team-role {
            font-size: 13px;
            color: var(--primary);
            font-weight: 500;
            margin-bottom: 6px;
        }

        .team-card p {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.6;
            margin: 0;
        }

        /* Partners */
        .partners-row {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            justify-content: center;
        }

        .partner-badge {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: 999px;
            padding: 12px 22px;
            font-size: 14px;
            font-weight: 600;
            color: var(--text-secondary);
            transition: all var(--transition);
            cursor: default;
            letter-spacing: 0.5px;
        }

        .partner-badge:hover {
            border-color: var(--primary);
            color: var(--primary);
            box-shadow: 0 4px 12px rgba(31, 94, 255, 0.1);
        }

        /* Guarantee */
        .guarantee-grid {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }

        .guarantee-item {
            flex: 1 1 220px;
            min-width: 180px;
            display: flex;
            align-items: flex-start;
            gap: 14px;
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            padding: 20px;
            transition: all var(--transition);
        }

        .guarantee-item:hover {
            box-shadow: var(--shadow-hover);
            border-color: var(--primary);
        }

        .guarantee-item .guarantee-icon {
            width: 42px;
            height: 42px;
            border-radius: 10px;
            background: rgba(0, 217, 192, 0.12);
            color: #009e8f;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            flex-shrink: 0;
        }

        .guarantee-item h3 {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 4px;
        }

        .guarantee-item p {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.6;
            margin: 0;
        }

        /* FAQ */
        .faq-wrapper {
            display: flex;
            gap: 32px;
            flex-wrap: wrap;
        }

        .faq-left {
            flex: 1 1 280px;
        }

        .faq-left h2 {
            font-size: 26px;
            font-weight: 700;
            color: var(--dark);
            margin-bottom: 12px;
        }

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

        .faq-right {
            flex: 2 1 500px;
        }

        .faq-item {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            margin-bottom: 10px;
            overflow: hidden;
            transition: all var(--transition);
        }

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

        .faq-question {
            padding: 18px 22px;
            cursor: pointer;
            font-size: 15px;
            font-weight: 600;
            color: var(--text-primary);
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 12px;
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            transition: all var(--transition);
            font-family: var(--font-family);
        }

        .faq-question:hover,
        .faq-question:focus {
            background: var(--secondary-bg);
            outline: none;
        }

        .faq-question .faq-icon {
            flex-shrink: 0;
            color: var(--primary);
            transition: transform var(--transition);
            font-size: 16px;
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.3s ease;
            padding: 0 22px;
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
        }

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

        .faq-item.open .faq-icon {
            transform: rotate(180deg);
        }

        /* Community */
        .community-grid {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }

        .community-bubble {
            flex: 1 1 280px;
            min-width: 240px;
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            padding: 20px;
            transition: all var(--transition);
        }

        .community-bubble:hover {
            box-shadow: var(--shadow-hover);
            border-color: var(--primary);
        }

        .community-bubble .bubble-user {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 10px;
        }

        .community-bubble .bubble-avatar {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            font-weight: 600;
        }

        .community-bubble .bubble-name {
            font-size: 14px;
            font-weight: 600;
            color: var(--text-primary);
        }

        .community-bubble .bubble-time {
            font-size: 12px;
            color: var(--text-secondary);
        }

        .community-bubble p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.65;
            margin: 0;
        }

        /* CTA / Subscribe */
        .cta-section {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-hover) 100%);
            border-radius: var(--radius-lg);
            padding: 48px 40px;
            color: #fff;
            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);
            pointer-events: none;
        }

        .cta-section::after {
            content: '';
            position: absolute;
            bottom: -40%;
            left: -10%;
            width: 300px;
            height: 300px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.04);
            pointer-events: none;
        }

        .cta-section h2 {
            font-size: 28px;
            font-weight: 700;
            margin-bottom: 12px;
            color: #fff;
            position: relative;
            z-index: 2;
        }

        .cta-section p {
            font-size: 15px;
            color: rgba(255, 255, 255, 0.85);
            max-width: 560px;
            margin: 0 auto 24px;
            line-height: 1.7;
            position: relative;
            z-index: 2;
        }

        .cta-form {
            display: flex;
            max-width: 480px;
            margin: 0 auto;
            gap: 10px;
            position: relative;
            z-index: 2;
            flex-wrap: wrap;
            justify-content: center;
        }

        .cta-form input {
            flex: 1;
            min-width: 240px;
            background: rgba(255, 255, 255, 0.95);
            border: none;
            border-radius: 999px;
            padding: 14px 22px;
            font-size: 15px;
            color: var(--text-primary);
            outline: none;
            box-shadow: inset 0 2px 6px rgba(0, 0, 0, 0.05);
            transition: all var(--transition);
        }

        .cta-form input:focus {
            box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.3), inset 0 2px 6px rgba(0, 0, 0, 0.05);
        }

        .cta-form input::placeholder {
            color: #9aa7bd;
        }

        .cta-form .btn {
            background: #fff;
            color: var(--primary);
            padding: 14px 28px;
            font-size: 15px;
            font-weight: 600;
            box-shadow: 0 4px 14px rgba(0, 0, 0, 0.15);
        }

        .cta-form .btn:hover,
        .cta-form .btn:focus {
            background: var(--secondary-bg);
            color: var(--primary-hover);
            transform: scale(0.98);
        }

        /* Footer */
        .footer {
            background: var(--dark);
            color: rgba(255, 255, 255, 0.75);
            padding: 50px 0 24px;
            margin-top: 0;
        }

        .footer .footer-grid {
            display: flex;
            gap: 32px;
            flex-wrap: wrap;
            margin-bottom: 36px;
        }

        .footer-col {
            flex: 1 1 200px;
            min-width: 160px;
        }

        .footer-col h4 {
            font-size: 15px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 14px;
            letter-spacing: 0.5px;
        }

        .footer-col a {
            display: block;
            color: rgba(255, 255, 255, 0.65);
            font-size: 13px;
            padding: 5px 0;
            text-decoration: none;
            transition: color var(--transition);
        }

        .footer-col a:hover,
        .footer-col a:focus {
            color: #fff;
            outline: none;
        }

        .footer-brand {
            font-size: 20px;
            font-weight: 700;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 12px;
        }

        .footer-brand .logo-icon {
            width: 32px;
            height: 32px;
            border-radius: 8px;
            background: var(--primary);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
        }

        .footer p {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.55);
            line-height: 1.7;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 18px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 12px;
        }

        .footer-bottom .copyright {
            color: rgba(255, 255, 255, 0.55);
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .section {
                padding: 60px 0;
            }
            .hero h1 {
                font-size: 32px;
            }
            .nav-menu a {
                padding: 8px 10px;
                font-size: 13px;
            }
            .nav-cta .btn {
                padding: 8px 14px;
                font-size: 13px;
            }
        }

        @media (max-width: 768px) {
            .section {
                padding: 48px 0;
            }
            .section-title {
                font-size: 24px;
            }
            .hero h1 {
                font-size: 26px;
            }
            .hero-subtitle {
                font-size: 14px;
                line-height: 1.65;
            }
            .nav-menu {
                display: none;
            }
            .nav-cta {
                display: none;
            }
            .hamburger {
                display: block;
            }
            .nav-card {
                flex-wrap: wrap;
                padding: 10px 16px;
            }
            .hero-data-row {
                gap: 10px;
            }
            .hero-data-row .data-card {
                min-width: 120px;
                padding: 14px 16px;
            }
            .hero-data-row .data-card .data-value {
                font-size: 20px;
            }
            .list-card {
                flex-direction: column;
                align-items: flex-start;
            }
            .list-card img {
                width: 100%;
                height: 140px;
                object-fit: cover;
            }
            .brand-intro-card {
                padding: 26px 22px;
            }
            .cta-section {
                padding: 36px 22px;
            }
            .cta-section h2 {
                font-size: 22px;
            }
            .footer .footer-grid {
                gap: 20px;
            }
            .footer-col {
                flex: 1 1 150px;
                min-width: 140px;
            }
            .steps-grid {
                gap: 12px;
            }
            .step-card {
                flex: 1 1 150px;
                min-width: 140px;
                padding: 18px 14px;
            }
        }

        @media (max-width: 520px) {
            .hero h1 {
                font-size: 22px;
            }
            .hero-search {
                padding: 6px 6px 6px 14px;
            }
            .hero-search .btn {
                padding: 8px 16px;
                font-size: 13px;
            }
            .hero-chips .chip {
                font-size: 12px;
                padding: 5px 12px;
            }
            .hero-data-row {
                gap: 6px;
            }
            .hero-data-row .data-card {
                min-width: 100px;
                padding: 12px 14px;
            }
            .hero-data-row .data-card .data-value {
                font-size: 18px;
            }
            .hero-data-row .data-card .data-label {
                font-size: 11px;
            }
            .section-title {
                font-size: 21px;
                padding-left: 12px;
            }
            .section-title::before {
                height: 18px;
                width: 3px;
            }
            .card {
                padding: 18px;
            }
            .faq-wrapper {
                gap: 20px;
            }
            .community-grid {
                gap: 12px;
            }
            .community-bubble {
                flex: 1 1 100%;
                min-width: auto;
            }
            .cta-form {
                flex-direction: column;
                gap: 10px;
            }
            .cta-form input {
                min-width: auto;
                width: 100%;
            }
            .cta-form .btn {
                width: 100%;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

/* roulang page: category2 */
:root {
            --primary: #1F5EFF;
            --primary-hover: #0F45D6;
            --secondary: #00D9C0;
            --gold: #FFB400;
            --bg: #F5F8FC;
            --card-bg: #FFFFFF;
            --secondary-bg: #EAF0FA;
            --dark: #0E1A2F;
            --text-primary: #1B2A3F;
            --text-secondary: #5C6B85;
            --border: #E3EAF5;
            --radius: 14px;
            --radius-lg: 18px;
            --radius-sm: 8px;
            --shadow: 0 4px 16px rgba(16, 42, 90, 0.06);
            --shadow-hover: 0 12px 28px rgba(16, 42, 90, 0.12);
            --transition: 0.2s ease;
            --section-pad: 76px 0;
            --font-family: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-family);
            background: var(--bg);
            color: var(--text-primary);
            line-height: 1.75;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            margin: 0;
            padding: 0;
            overflow-x: hidden;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }
        a {
            text-decoration: none;
            color: var(--primary);
            transition: color var(--transition);
        }
        a:hover,
        a:focus {
            color: var(--primary-hover);
            outline: none;
        }
        a:focus-visible {
            outline: 3px solid rgba(31, 94, 255, 0.25);
            outline-offset: 2px;
            border-radius: 4px;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-sm);
        }
        button,
        input {
            font-family: var(--font-family);
            font-size: 15px;
        }
        .row {
            max-width: 1200px;
            margin: 0 auto;
        }
        .container-custom {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .section {
            padding: var(--section-pad);
        }
        .section-alt {
            background: var(--secondary-bg);
        }
        .section-dark {
            background: var(--dark);
            color: #fff;
        }
        .section-title {
            font-size: 30px;
            font-weight: 700;
            line-height: 1.3;
            color: var(--dark);
            margin-bottom: 14px;
            position: relative;
            padding-left: 16px;
        }
        .section-title::before {
            content: '';
            position: absolute;
            left: 0;
            top: 50%;
            transform: translateY(-50%);
            width: 4px;
            height: 24px;
            background: var(--primary);
            border-radius: 2px;
        }
        .section-subtitle {
            font-size: 16px;
            color: var(--text-secondary);
            margin-bottom: 36px;
            max-width: 720px;
            line-height: 1.7;
        }
        .tag {
            display: inline-block;
            background: rgba(0, 217, 192, 0.12);
            color: #009e8f;
            font-size: 12px;
            font-weight: 500;
            letter-spacing: 0.5px;
            padding: 4px 12px;
            border-radius: 999px;
            margin-right: 6px;
            margin-bottom: 6px;
            cursor: pointer;
            transition: all var(--transition);
            border: none;
            user-select: none;
        }
        .tag:hover,
        .tag:focus {
            background: rgba(0, 217, 192, 0.25);
            color: #007a70;
            outline: none;
        }
        .tag.active {
            background: var(--primary);
            color: #fff;
        }
        .tag:focus-visible {
            outline: 3px solid rgba(31, 94, 255, 0.25);
            outline-offset: 2px;
        }
        .badge-gold {
            display: inline-block;
            background: var(--gold);
            color: var(--dark);
            font-size: 12px;
            font-weight: 600;
            padding: 3px 10px;
            border-radius: 999px;
            letter-spacing: 0.5px;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            border-radius: 999px;
            padding: 12px 26px;
            font-size: 15px;
            font-weight: 600;
            border: none;
            cursor: pointer;
            transition: all var(--transition);
            text-decoration: none;
            line-height: 1.4;
            white-space: nowrap;
        }
        .btn:focus-visible {
            outline: 3px solid rgba(31, 94, 255, 0.25);
            outline-offset: 3px;
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 14px rgba(31, 94, 255, 0.25);
        }
        .btn-primary:hover,
        .btn-primary:focus {
            background: var(--primary-hover);
            color: #fff;
            transform: scale(0.98);
            box-shadow: 0 6px 20px rgba(31, 94, 255, 0.35);
        }
        .btn-primary:active {
            transform: scale(0.97);
            box-shadow: 0 2px 8px rgba(31, 94, 255, 0.2);
        }
        .btn-secondary {
            background: #fff;
            color: var(--primary);
            border: 1px solid var(--primary);
        }
        .btn-secondary:hover,
        .btn-secondary:focus {
            background: var(--secondary-bg);
            color: var(--primary-hover);
            border-color: var(--primary-hover);
        }
        .btn-ghost {
            background: transparent;
            color: #fff;
            border: 1px solid rgba(255, 255, 255, 0.7);
        }
        .btn-ghost:hover,
        .btn-ghost:focus {
            background: rgba(255, 255, 255, 0.12);
            color: #fff;
        }
        .card {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            padding: 24px;
            transition: all var(--transition);
            height: 100%;
        }
        .card:hover {
            transform: translateY(-2px);
            box-shadow: var(--shadow-hover);
            border-color: var(--primary);
        }
        .card-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            margin-bottom: 16px;
            background: rgba(31, 94, 255, 0.08);
            color: var(--primary);
            flex-shrink: 0;
        }
        .card-icon.teal {
            background: rgba(0, 217, 192, 0.12);
            color: #009e8f;
        }
        .card-icon.gold {
            background: rgba(255, 180, 0, 0.15);
            color: #d18f00;
        }
        /* 导航样式 */
        .nav-wrapper {
            position: sticky;
            top: 0;
            z-index: 100;
            padding: 12px 0;
            background: var(--bg);
        }
        .nav-card {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: 16px;
            box-shadow: var(--shadow);
            padding: 10px 18px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            position: relative;
            flex-wrap: wrap;
        }
        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 700;
            color: var(--dark);
            text-decoration: none;
            white-space: nowrap;
        }
        .nav-logo:hover,
        .nav-logo:focus {
            color: var(--primary);
        }
        .logo-icon {
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: var(--primary);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            flex-shrink: 0;
        }
        .nav-menu {
            display: flex;
            align-items: center;
            gap: 4px;
            list-style: none;
            margin: 0;
            padding: 0;
            flex-wrap: wrap;
        }
        .nav-menu li a {
            display: flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            font-weight: 600;
            color: var(--text-secondary);
            padding: 8px 14px;
            border-radius: 10px;
            transition: all var(--transition);
            text-decoration: none;
            white-space: nowrap;
        }
        .nav-menu li a:hover,
        .nav-menu li a:focus {
            background: var(--secondary-bg);
            color: var(--primary);
        }
        .nav-menu li a.active {
            background: rgba(31, 94, 255, 0.08);
            color: var(--primary);
        }
        .nav-menu li a:focus-visible {
            outline: 3px solid rgba(31, 94, 255, 0.25);
            outline-offset: 2px;
        }
        .nav-icon {
            font-size: 14px;
            width: 20px;
            text-align: center;
        }
        .nav-cta {
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            font-size: 24px;
            color: var(--text-primary);
            cursor: pointer;
            padding: 4px 8px;
            border-radius: 8px;
            transition: all var(--transition);
        }
        .hamburger:hover,
        .hamburger:focus {
            background: var(--secondary-bg);
            color: var(--primary);
        }
        .hamburger:focus-visible {
            outline: 3px solid rgba(31, 94, 255, 0.25);
            outline-offset: 2px;
        }
        .mobile-nav {
            display: none;
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: 16px;
            box-shadow: var(--shadow-hover);
            padding: 16px;
            flex-direction: column;
            gap: 4px;
            margin-top: 8px;
        }
        .mobile-nav a {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 15px;
            font-weight: 600;
            color: var(--text-primary);
            padding: 12px 14px;
            border-radius: 10px;
            transition: all var(--transition);
            text-decoration: none;
        }
        .mobile-nav a:hover,
        .mobile-nav a:focus {
            background: var(--secondary-bg);
            color: var(--primary);
        }
        .mobile-nav a.active {
            background: rgba(31, 94, 255, 0.08);
            color: var(--primary);
        }
        .mobile-nav a:focus-visible {
            outline: 3px solid rgba(31, 94, 255, 0.25);
            outline-offset: 2px;
        }
        .mobile-nav.show {
            display: flex;
        }
        /* 面包屑 */
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--text-secondary);
            margin-bottom: 12px;
            flex-wrap: wrap;
        }
        .breadcrumb a {
            color: var(--text-secondary);
            text-decoration: none;
            transition: color var(--transition);
        }
        .breadcrumb a:hover,
        .breadcrumb a:focus {
            color: var(--primary);
        }
        .breadcrumb .sep {
            color: #b8c4d4;
            font-size: 12px;
        }
        .breadcrumb .current {
            color: var(--primary);
            font-weight: 600;
        }
        /* 分类页 Hero */
        .category-hero {
            background: linear-gradient(180deg, #ffffff 0%, #F0F5FE 55%, var(--dark) 56%, var(--dark) 100%);
            padding: 48px 0 120px;
            position: relative;
            overflow: hidden;
        }
        .category-hero .h1-wrap {
            max-width: 800px;
        }
        .category-hero h1 {
            font-size: 36px;
            font-weight: 700;
            line-height: 1.25;
            color: var(--dark);
            margin-bottom: 16px;
            letter-spacing: -0.5px;
        }
        .category-hero .hero-desc {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.7;
            max-width: 680px;
            margin-bottom: 24px;
        }
        .hero-stats-row {
            display: flex;
            gap: 20px;
            flex-wrap: wrap;
            margin-top: 8px;
        }
        .hero-stat-chip {
            background: rgba(255, 255, 255, 0.92);
            border: 1px solid var(--border);
            border-radius: 12px;
            padding: 12px 18px;
            display: flex;
            flex-direction: column;
            gap: 2px;
            min-width: 120px;
            box-shadow: var(--shadow);
            backdrop-filter: blur(4px);
        }
        .hero-stat-chip .stat-value {
            font-size: 22px;
            font-weight: 700;
            color: var(--primary);
        }
        .hero-stat-chip .stat-label {
            font-size: 12px;
            color: var(--text-secondary);
            font-weight: 500;
        }
        /* 统计条 */
        .stats-bar {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            padding: 20px 28px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 16px;
            margin-top: -70px;
            position: relative;
            z-index: 5;
        }
        .stats-bar .stat-item {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .stats-bar .stat-icon {
            width: 40px;
            height: 40px;
            border-radius: 10px;
            background: rgba(31, 94, 255, 0.08);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            flex-shrink: 0;
        }
        .stats-bar .stat-num {
            font-size: 22px;
            font-weight: 700;
            color: var(--dark);
            line-height: 1.2;
        }
        .stats-bar .stat-label {
            font-size: 12px;
            color: var(--text-secondary);
            font-weight: 500;
        }
        /* 筛选工具条 */
        .filter-bar {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            padding: 18px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            margin-bottom: 36px;
        }
        .filter-bar .filter-label {
            font-size: 14px;
            font-weight: 600;
            color: var(--text-primary);
            display: flex;
            align-items: center;
            gap: 8px;
            white-space: nowrap;
        }
        .filter-bar .filter-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 6px;
            align-items: center;
        }
        .filter-bar .tag {
            margin-bottom: 0;
            margin-right: 0;
        }
        .filter-search {
            display: flex;
            align-items: center;
            gap: 8px;
            background: var(--bg);
            border-radius: 999px;
            padding: 6px 14px;
            border: 1px solid var(--border);
            transition: all var(--transition);
            min-width: 200px;
        }
        .filter-search input {
            border: none;
            background: transparent;
            outline: none;
            font-size: 14px;
            color: var(--text-primary);
            width: 100%;
            padding: 4px 0;
        }
        .filter-search input::placeholder {
            color: #9aa8bd;
            font-size: 13px;
        }
        .filter-search:focus-within {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(31, 94, 255, 0.12);
        }
        .filter-search i {
            color: var(--text-secondary);
            font-size: 14px;
        }
        /* 列表卡片 */
        .list-card {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            padding: 18px 20px;
            display: flex;
            align-items: center;
            gap: 18px;
            transition: all var(--transition);
            margin-bottom: 14px;
            cursor: pointer;
            text-decoration: none;
            color: inherit;
        }
        .list-card:hover,
        .list-card:focus {
            transform: translateY(-2px);
            box-shadow: var(--shadow-hover);
            border-color: var(--primary);
            color: inherit;
        }
        .list-card:focus-visible {
            outline: 3px solid rgba(31, 94, 255, 0.25);
            outline-offset: 2px;
        }
        .list-card .list-img {
            width: 100px;
            height: 76px;
            border-radius: 10px;
            overflow: hidden;
            flex-shrink: 0;
            background: var(--secondary-bg);
        }
        .list-card .list-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: 10px;
        }
        .list-card .list-content {
            flex: 1;
            min-width: 0;
        }
        .list-card .list-title {
            font-size: 17px;
            font-weight: 600;
            color: var(--dark);
            line-height: 1.45;
            margin-bottom: 6px;
            transition: color var(--transition);
        }
        .list-card:hover .list-title,
        .list-card:focus .list-title {
            color: var(--primary);
        }
        .list-card .list-desc {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 6px;
        }
        .list-card .list-meta {
            display: flex;
            align-items: center;
            gap: 14px;
            font-size: 12px;
            color: #8b99ae;
            flex-wrap: wrap;
        }
        .list-card .list-meta span {
            display: flex;
            align-items: center;
            gap: 4px;
        }
        .list-card .list-meta i {
            font-size: 11px;
            color: #b0bccd;
        }
        .list-card .list-right {
            display: flex;
            flex-direction: column;
            align-items: flex-end;
            gap: 8px;
            flex-shrink: 0;
        }
        .list-card .heat-badge {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            background: rgba(255, 180, 0, 0.15);
            color: #d18f00;
            font-size: 12px;
            font-weight: 600;
            padding: 3px 10px;
            border-radius: 999px;
            white-space: nowrap;
        }
        .list-card .heat-badge.hot {
            background: rgba(255, 82, 82, 0.12);
            color: #d64545;
        }
        .list-card .heat-badge i {
            font-size: 10px;
        }
        .view-more-wrap {
            text-align: right;
            margin-top: 8px;
        }
        /* 热门推荐侧栏 */
        .hot-card {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            padding: 20px;
            margin-bottom: 16px;
            transition: all var(--transition);
            text-decoration: none;
            color: inherit;
            display: block;
        }
        .hot-card:hover,
        .hot-card:focus {
            transform: translateY(-2px);
            box-shadow: var(--shadow-hover);
            border-color: var(--primary);
            color: inherit;
        }
        .hot-card:focus-visible {
            outline: 3px solid rgba(31, 94, 255, 0.25);
            outline-offset: 2px;
        }
        .hot-card .hot-rank {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            font-size: 12px;
            font-weight: 700;
            color: var(--gold);
            margin-bottom: 6px;
        }
        .hot-card .hot-title {
            font-size: 15px;
            font-weight: 600;
            color: var(--dark);
            line-height: 1.4;
            margin-bottom: 6px;
            transition: color var(--transition);
        }
        .hot-card:hover .hot-title,
        .hot-card:focus .hot-title {
            color: var(--primary);
        }
        .hot-card .hot-meta {
            font-size: 12px;
            color: #8b99ae;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        /* 相关专题入口 */
        .topic-entry-card {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            padding: 22px;
            text-align: center;
            transition: all var(--transition);
            text-decoration: none;
            color: inherit;
            display: block;
            height: 100%;
        }
        .topic-entry-card:hover,
        .topic-entry-card:focus {
            transform: translateY(-3px);
            box-shadow: var(--shadow-hover);
            border-color: var(--primary);
            color: inherit;
        }
        .topic-entry-card:focus-visible {
            outline: 3px solid rgba(31, 94, 255, 0.25);
            outline-offset: 2px;
        }
        .topic-entry-card .topic-icon {
            width: 52px;
            height: 52px;
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            margin: 0 auto 12px;
            background: rgba(31, 94, 255, 0.08);
            color: var(--primary);
        }
        .topic-entry-card .topic-icon.teal {
            background: rgba(0, 217, 192, 0.12);
            color: #009e8f;
        }
        .topic-entry-card .topic-icon.gold {
            background: rgba(255, 180, 0, 0.15);
            color: #d18f00;
        }
        .topic-entry-card h3 {
            font-size: 16px;
            font-weight: 600;
            color: var(--dark);
            margin-bottom: 4px;
        }
        .topic-entry-card p {
            font-size: 13px;
            color: var(--text-secondary);
            margin-bottom: 0;
            line-height: 1.5;
        }
        /* 订阅 CTA */
        .cta-gradient {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-hover) 100%);
            border-radius: var(--radius-lg);
            padding: 48px 40px;
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 32px;
            position: relative;
            overflow: hidden;
        }
        .cta-gradient::before {
            content: '';
            position: absolute;
            top: -40%;
            right: -10%;
            width: 300px;
            height: 300px;
            border-radius: 50%;
            background: rgba(0, 217, 192, 0.2);
            pointer-events: none;
        }
        .cta-gradient::after {
            content: '';
            position: absolute;
            bottom: -30%;
            left: 20%;
            width: 200px;
            height: 200px;
            border-radius: 50%;
            background: rgba(255, 180, 0, 0.15);
            pointer-events: none;
        }
        .cta-gradient .cta-text {
            flex: 1;
            min-width: 280px;
            position: relative;
            z-index: 1;
        }
        .cta-gradient .cta-text h2 {
            font-size: 26px;
            font-weight: 700;
            margin-bottom: 8px;
            color: #fff;
            letter-spacing: -0.3px;
        }
        .cta-gradient .cta-text p {
            font-size: 15px;
            opacity: 0.9;
            margin-bottom: 0;
            line-height: 1.6;
        }
        .cta-gradient .cta-form {
            display: flex;
            gap: 10px;
            align-items: center;
            flex-wrap: wrap;
            position: relative;
            z-index: 1;
        }
        .cta-gradient .cta-form input {
            border: none;
            background: #fff;
            border-radius: 999px;
            padding: 12px 20px;
            font-size: 14px;
            min-width: 260px;
            outline: none;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.15);
            color: var(--text-primary);
        }
        .cta-gradient .cta-form input::placeholder {
            color: #9aa8bd;
        }
        .cta-gradient .cta-form input:focus {
            box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.4);
        }
        .cta-gradient .btn-white {
            background: #fff;
            color: var(--primary);
            font-weight: 600;
        }
        .cta-gradient .btn-white:hover,
        .cta-gradient .btn-white:focus {
            background: var(--secondary-bg);
            color: var(--primary-hover);
            transform: scale(0.98);
        }
        /* FAQ */
        .faq-section {
            background: #fff;
        }
        .faq-grid {
            display: grid;
            grid-template-columns: 1fr 1.6fr;
            gap: 40px;
            align-items: start;
        }
        .faq-left h2 {
            font-size: 28px;
            font-weight: 700;
            color: var(--dark);
            margin-bottom: 10px;
        }
        .faq-left p {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 0;
        }
        .faq-item {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            margin-bottom: 12px;
            overflow: hidden;
            transition: all var(--transition);
        }
        .faq-item:hover {
            border-color: var(--primary);
        }
        .faq-question {
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            padding: 18px 22px;
            font-size: 15px;
            font-weight: 600;
            color: var(--dark);
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            transition: all var(--transition);
            font-family: var(--font-family);
        }
        .faq-question:hover,
        .faq-question:focus {
            color: var(--primary);
            background: rgba(31, 94, 255, 0.03);
            outline: none;
        }
        .faq-question:focus-visible {
            outline: 3px solid rgba(31, 94, 255, 0.25);
            outline-offset: -2px;
        }
        .faq-question .faq-icon {
            flex-shrink: 0;
            font-size: 16px;
            color: var(--text-secondary);
            transition: transform var(--transition);
        }
        .faq-item.open .faq-question .faq-icon {
            transform: rotate(180deg);
            color: var(--primary);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease, padding 0.3s ease;
            padding: 0 22px;
        }
        .faq-item.open .faq-answer {
            max-height: 500px;
            padding: 0 22px 18px;
        }
        .faq-answer p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin: 0;
        }
        /* 页脚 */
        .footer {
            background: var(--dark);
            color: #fff;
            padding: 60px 0 24px;
            margin-top: 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1.4fr 1.4fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 14px;
            color: #fff;
        }
        .footer-brand .logo-icon {
            background: var(--primary);
        }
        .footer-col p {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.65);
            line-height: 1.7;
            margin-bottom: 0;
            max-width: 300px;
        }
        .footer-col h4 {
            font-size: 15px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 14px;
            letter-spacing: 0.3px;
        }
        .footer-col a {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.65);
            padding: 5px 0;
            transition: all var(--transition);
            text-decoration: none;
        }
        .footer-col a:hover,
        .footer-col a:focus {
            color: #fff;
            padding-left: 4px;
        }
        .footer-col a i {
            font-size: 12px;
            width: 16px;
            text-align: center;
            color: rgba(255, 255, 255, 0.5);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.12);
            padding-top: 20px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 10px;
            font-size: 13px;
        }
        .footer-bottom .copyright {
            color: rgba(255, 255, 255, 0.55);
        }
        /* 响应式 */
        @media screen and (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
            .faq-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .category-hero {
                padding: 40px 0 100px;
            }
            .category-hero h1 {
                font-size: 30px;
            }
        }
        @media screen and (max-width: 768px) {
            .section {
                padding: 48px 0;
            }
            .section-title {
                font-size: 24px;
            }
            .nav-card {
                flex-wrap: nowrap;
            }
            .nav-menu {
                display: none;
            }
            .nav-cta {
                display: none;
            }
            .hamburger {
                display: block;
            }
            .category-hero {
                padding: 32px 0 90px;
            }
            .category-hero h1 {
                font-size: 26px;
            }
            .hero-stats-row {
                gap: 10px;
            }
            .hero-stat-chip {
                min-width: 100px;
                padding: 10px 14px;
            }
            .stats-bar {
                padding: 16px 18px;
                justify-content: flex-start;
            }
            .stats-bar .stat-item {
                gap: 8px;
            }
            .stats-bar .stat-num {
                font-size: 18px;
            }
            .filter-bar {
                padding: 14px 16px;
                flex-direction: column;
                align-items: flex-start;
            }
            .filter-search {
                width: 100%;
                min-width: auto;
            }
            .list-card {
                padding: 14px 16px;
                gap: 12px;
                flex-wrap: wrap;
            }
            .list-card .list-img {
                width: 80px;
                height: 64px;
            }
            .list-card .list-right {
                width: 100%;
                flex-direction: row;
                align-items: center;
                justify-content: space-between;
            }
            .cta-gradient {
                padding: 32px 24px;
                flex-direction: column;
                text-align: center;
            }
            .cta-gradient .cta-form {
                width: 100%;
                flex-direction: column;
            }
            .cta-gradient .cta-form input {
                width: 100%;
                min-width: auto;
            }
            .faq-question {
                padding: 14px 16px;
                font-size: 14px;
            }
            .faq-answer {
                padding: 0 16px;
            }
            .faq-item.open .faq-answer {
                padding: 0 16px 14px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
                gap: 6px;
            }
        }
        @media screen and (max-width: 520px) {
            .container-custom {
                padding: 0 14px;
            }
            .category-hero h1 {
                font-size: 22px;
            }
            .category-hero .hero-desc {
                font-size: 14px;
            }
            .hero-stats-row {
                flex-direction: column;
                gap: 8px;
            }
            .hero-stat-chip {
                flex-direction: row;
                align-items: center;
                gap: 8px;
                justify-content: space-between;
            }
            .stats-bar .stat-item {
                width: 100%;
                justify-content: flex-start;
            }
            .list-card {
                flex-direction: column;
                align-items: flex-start;
            }
            .list-card .list-img {
                width: 100%;
                height: 160px;
                border-radius: 10px;
            }
            .list-card .list-right {
                flex-direction: row;
                justify-content: space-between;
                width: 100%;
            }
            .section-title {
                font-size: 20px;
                padding-left: 12px;
            }
            .section-title::before {
                height: 18px;
                width: 3px;
            }
        }

/* roulang page: category1 */
:root {
            --primary: #1F5EFF;
            --primary-hover: #0F45D6;
            --secondary: #00D9C0;
            --gold: #FFB400;
            --bg: #F5F8FC;
            --card-bg: #FFFFFF;
            --secondary-bg: #EAF0FA;
            --dark: #0E1A2F;
            --text-primary: #1B2A3F;
            --text-secondary: #5C6B85;
            --border: #E3EAF5;
            --radius: 14px;
            --radius-lg: 18px;
            --radius-sm: 8px;
            --shadow: 0 4px 16px rgba(16, 42, 90, 0.06);
            --shadow-hover: 0 12px 28px rgba(16, 42, 90, 0.12);
            --transition: 0.2s ease;
            --section-pad: 76px 0;
            --font-family: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-family);
            background: var(--bg);
            color: var(--text-primary);
            line-height: 1.75;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            margin: 0;
            padding: 0;
        }
        a {
            text-decoration: none;
            color: var(--primary);
            transition: color var(--transition);
        }
        a:hover,
        a:focus {
            color: var(--primary-hover);
            outline: none;
        }
        a:focus-visible {
            outline: 3px solid rgba(31, 94, 255, 0.25);
            outline-offset: 2px;
            border-radius: 4px;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-sm);
        }
        button,
        input {
            font-family: var(--font-family);
            font-size: 15px;
        }
        .row {
            max-width: 1200px;
        }
        .container-custom {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .section {
            padding: var(--section-pad);
        }
        .section-alt {
            background: var(--secondary-bg);
        }
        .section-dark {
            background: var(--dark);
            color: #fff;
        }
        .section-title {
            font-size: 30px;
            font-weight: 700;
            line-height: 1.3;
            color: var(--dark);
            margin-bottom: 14px;
            position: relative;
            padding-left: 16px;
        }
        .section-title::before {
            content: '';
            position: absolute;
            left: 0;
            top: 50%;
            transform: translateY(-50%);
            width: 4px;
            height: 24px;
            background: var(--primary);
            border-radius: 2px;
        }
        .section-subtitle {
            font-size: 16px;
            color: var(--text-secondary);
            margin-bottom: 36px;
            max-width: 720px;
            line-height: 1.7;
        }
        .tag {
            display: inline-block;
            background: rgba(0, 217, 192, 0.12);
            color: #009e8f;
            font-size: 12px;
            font-weight: 500;
            letter-spacing: 0.5px;
            padding: 4px 12px;
            border-radius: 999px;
            margin-right: 6px;
            margin-bottom: 6px;
            cursor: pointer;
            transition: all var(--transition);
            border: 1px solid transparent;
        }
        .tag:hover {
            background: rgba(0, 217, 192, 0.22);
            border-color: var(--secondary);
        }
        .tag.active {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }
        .badge-gold {
            display: inline-block;
            background: var(--gold);
            color: var(--dark);
            font-size: 12px;
            font-weight: 600;
            padding: 3px 10px;
            border-radius: 999px;
            letter-spacing: 0.5px;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            border-radius: 999px;
            padding: 12px 26px;
            font-size: 15px;
            font-weight: 600;
            border: none;
            cursor: pointer;
            transition: all var(--transition);
            text-decoration: none;
            line-height: 1.4;
            white-space: nowrap;
        }
        .btn:focus-visible {
            outline: 3px solid rgba(31, 94, 255, 0.25);
            outline-offset: 3px;
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 14px rgba(31, 94, 255, 0.25);
        }
        .btn-primary:hover,
        .btn-primary:focus {
            background: var(--primary-hover);
            color: #fff;
            transform: scale(0.98);
            box-shadow: 0 6px 20px rgba(31, 94, 255, 0.35);
        }
        .btn-primary:active {
            transform: scale(0.97);
            box-shadow: 0 2px 8px rgba(31, 94, 255, 0.2);
        }
        .btn-secondary {
            background: #fff;
            color: var(--primary);
            border: 1px solid var(--primary);
        }
        .btn-secondary:hover,
        .btn-secondary:focus {
            background: var(--secondary-bg);
            color: var(--primary-hover);
            border-color: var(--primary-hover);
        }
        .btn-ghost {
            background: transparent;
            color: #fff;
            border: 1px solid rgba(255, 255, 255, 0.7);
        }
        .btn-ghost:hover,
        .btn-ghost:focus {
            background: rgba(255, 255, 255, 0.12);
            color: #fff;
        }
        .card {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            padding: 24px;
            transition: all var(--transition);
            height: 100%;
        }
        .card:hover {
            transform: translateY(-2px);
            box-shadow: var(--shadow-hover);
            border-color: var(--primary);
        }
        .card-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            margin-bottom: 16px;
            background: rgba(31, 94, 255, 0.08);
            color: var(--primary);
            flex-shrink: 0;
        }
        .card-icon.teal {
            background: rgba(0, 217, 192, 0.12);
            color: #009e8f;
        }
        .card-icon.gold {
            background: rgba(255, 180, 0, 0.15);
            color: #d18f00;
        }

        /* Navigation */
        .nav-wrapper {
            padding: 12px 0 0;
            position: relative;
            z-index: 50;
        }
        .nav-card {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: 16px;
            box-shadow: 0 4px 20px rgba(16, 42, 90, 0.07);
            padding: 10px 18px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            position: relative;
        }
        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 700;
            color: var(--dark);
            text-decoration: none;
            white-space: nowrap;
        }
        .nav-logo:hover,
        .nav-logo:focus {
            color: var(--primary);
        }
        .logo-icon {
            width: 36px;
            height: 36px;
            background: var(--primary);
            color: #fff;
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
        }
        .nav-menu {
            display: flex;
            align-items: center;
            gap: 6px;
            list-style: none;
            margin: 0;
            padding: 0;
            flex-wrap: wrap;
        }
        .nav-menu li a {
            display: flex;
            align-items: center;
            gap: 7px;
            padding: 8px 14px;
            border-radius: 10px;
            font-size: 14px;
            font-weight: 600;
            color: var(--text-secondary);
            text-decoration: none;
            transition: all var(--transition);
            white-space: nowrap;
        }
        .nav-menu li a:hover,
        .nav-menu li a:focus {
            background: var(--secondary-bg);
            color: var(--primary);
        }
        .nav-menu li a.active {
            background: rgba(31, 94, 255, 0.1);
            color: var(--primary);
        }
        .nav-icon {
            font-size: 14px;
        }
        .nav-cta {
            display: flex;
            align-items: center;
        }
        .nav-cta .btn {
            padding: 10px 20px;
            font-size: 14px;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            font-size: 22px;
            color: var(--text-primary);
            cursor: pointer;
            padding: 6px 10px;
            border-radius: 8px;
            transition: all var(--transition);
        }
        .hamburger:hover {
            background: var(--secondary-bg);
            color: var(--primary);
        }
        .mobile-nav {
            display: none;
            background: #fff;
            border: 1px solid var(--border);
            border-radius: 16px;
            box-shadow: var(--shadow-hover);
            padding: 12px;
            margin-top: 8px;
            flex-direction: column;
            gap: 6px;
        }
        .mobile-nav a {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 10px 14px;
            border-radius: 10px;
            font-size: 15px;
            font-weight: 600;
            color: var(--text-secondary);
            text-decoration: none;
            transition: all var(--transition);
        }
        .mobile-nav a:hover,
        .mobile-nav a:focus {
            background: var(--secondary-bg);
            color: var(--primary);
        }
        .mobile-nav a.active {
            background: rgba(31, 94, 255, 0.1);
            color: var(--primary);
        }

        /* Breadcrumb */
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--text-secondary);
            margin-bottom: 18px;
            flex-wrap: wrap;
        }
        .breadcrumb a {
            color: var(--primary);
            text-decoration: none;
            font-weight: 500;
        }
        .breadcrumb a:hover {
            color: var(--primary-hover);
            text-decoration: underline;
        }
        .breadcrumb .separator {
            color: #b0bccd;
            font-size: 12px;
        }
        .breadcrumb .current {
            color: var(--text-secondary);
            font-weight: 500;
        }

        /* Hero / Page Header */
        .page-hero {
            background: linear-gradient(180deg, #e8f0fe 0%, #f5f8fc 100%);
            padding: 42px 0 48px;
            position: relative;
            overflow: hidden;
        }
        .page-hero::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 80px;
            background: linear-gradient(180deg, transparent 0%, rgba(14, 26, 47, 0.04) 100%);
            pointer-events: none;
        }
        .page-hero h1 {
            font-size: 36px;
            font-weight: 700;
            line-height: 1.2;
            color: var(--dark);
            margin-bottom: 14px;
        }
        .page-hero .hero-desc {
            font-size: 17px;
            color: var(--text-secondary);
            max-width: 760px;
            line-height: 1.75;
            margin-bottom: 22px;
        }
        .page-hero .hero-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-wrap: wrap;
        }
        .page-hero .hero-meta span {
            font-size: 14px;
            color: var(--text-secondary);
            background: rgba(255,255,255,0.7);
            padding: 6px 14px;
            border-radius: 999px;
            border: 1px solid var(--border);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .page-hero .hero-meta i {
            color: var(--primary);
            font-size: 13px;
        }

        /* Stats bar */
        .stats-bar {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            padding: 22px 24px;
            margin-top: -28px;
            position: relative;
            z-index: 3;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
        }
        .stats-item {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 4px 10px;
        }
        .stats-item .stat-icon {
            width: 44px;
            height: 44px;
            border-radius: 10px;
            background: rgba(31, 94, 255, 0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            font-size: 19px;
            flex-shrink: 0;
        }
        .stats-item .stat-num {
            font-size: 24px;
            font-weight: 700;
            color: var(--primary);
            line-height: 1.2;
        }
        .stats-item .stat-label {
            font-size: 13px;
            color: var(--text-secondary);
            letter-spacing: 0.5px;
        }
        .stats-divider {
            width: 1px;
            height: 40px;
            background: var(--border);
            flex-shrink: 0;
        }

        /* Filter Toolbar */
        .filter-toolbar {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            padding: 18px 20px;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 10px 14px;
            margin-bottom: 32px;
        }
        .filter-toolbar .filter-label {
            font-size: 14px;
            font-weight: 600;
            color: var(--text-primary);
            display: flex;
            align-items: center;
            gap: 8px;
            white-space: nowrap;
        }
        .filter-toolbar .filter-label i {
            color: var(--primary);
        }
        .filter-group {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }
        .filter-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 7px 16px;
            border-radius: 999px;
            font-size: 13px;
            font-weight: 500;
            background: var(--bg);
            color: var(--text-secondary);
            border: 1px solid var(--border);
            cursor: pointer;
            transition: all var(--transition);
            white-space: nowrap;
        }
        .filter-tag:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: rgba(31, 94, 255, 0.06);
        }
        .filter-tag.active {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }

        /* List Card */
        .list-card {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            padding: 16px;
            display: flex;
            align-items: center;
            gap: 18px;
            transition: all var(--transition);
            margin-bottom: 14px;
            position: relative;
        }
        .list-card:hover {
            transform: translateY(-2px);
            box-shadow: var(--shadow-hover);
            border-color: var(--primary);
        }
        .list-card .card-thumb {
            width: 110px;
            height: 80px;
            border-radius: 10px;
            overflow: hidden;
            flex-shrink: 0;
            position: relative;
        }
        .list-card .card-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: 10px;
        }
        .list-card .card-thumb .thumb-overlay {
            position: absolute;
            top: 8px;
            left: 8px;
            background: rgba(14, 26, 47, 0.75);
            color: #fff;
            font-size: 11px;
            font-weight: 600;
            padding: 3px 10px;
            border-radius: 999px;
            letter-spacing: 0.5px;
            backdrop-filter: blur(4px);
        }
        .list-card .card-body {
            flex: 1;
            min-width: 0;
        }
        .list-card .card-title {
            font-size: 17px;
            font-weight: 600;
            color: var(--dark);
            margin-bottom: 6px;
            line-height: 1.45;
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
        }
        .list-card .card-title a {
            color: var(--dark);
            text-decoration: none;
            transition: color var(--transition);
        }
        .list-card .card-title a:hover {
            color: var(--primary);
        }
        .list-card .card-summary {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
            margin-bottom: 8px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .list-card .card-meta {
            display: flex;
            align-items: center;
            gap: 14px;
            flex-wrap: wrap;
            font-size: 12px;
            color: var(--text-secondary);
        }
        .list-card .card-meta i {
            color: var(--primary);
            font-size: 11px;
            margin-right: 4px;
        }
        .list-card .card-meta .hot {
            color: #f5624c;
            font-weight: 600;
        }
        .list-card .card-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 6px;
            flex-shrink: 0;
            max-width: 160px;
        }
        .list-card .card-tags .tag {
            font-size: 11px;
            padding: 3px 10px;
            margin: 0;
        }

        /* Sidebar */
        .sidebar-card {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            padding: 22px;
            margin-bottom: 22px;
        }
        .sidebar-card .sidebar-title {
            font-size: 17px;
            font-weight: 700;
            color: var(--dark);
            margin-bottom: 16px;
            padding-left: 12px;
            position: relative;
        }
        .sidebar-card .sidebar-title::before {
            content: '';
            position: absolute;
            left: 0;
            top: 50%;
            transform: translateY(-50%);
            width: 3px;
            height: 18px;
            background: var(--primary);
            border-radius: 2px;
        }
        .sidebar-list-item {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 10px 0;
            border-bottom: 1px solid var(--border);
            transition: all var(--transition);
        }
        .sidebar-list-item:last-child {
            border-bottom: none;
        }
        .sidebar-list-item:hover {
            padding-left: 6px;
        }
        .sidebar-list-item .sidebar-thumb {
            width: 56px;
            height: 44px;
            border-radius: 8px;
            overflow: hidden;
            flex-shrink: 0;
        }
        .sidebar-list-item .sidebar-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: 8px;
        }
        .sidebar-list-item .sidebar-info {
            flex: 1;
            min-width: 0;
        }
        .sidebar-list-item .sidebar-info .s-title {
            font-size: 13px;
            font-weight: 600;
            color: var(--text-primary);
            line-height: 1.4;
            margin-bottom: 3px;
            display: -webkit-box;
            -webkit-line-clamp: 1;
            -webkit-box-orient: vertical;
            overflow: hidden;
            text-decoration: none;
        }
        .sidebar-list-item .sidebar-info .s-title:hover {
            color: var(--primary);
        }
        .sidebar-list-item .sidebar-info .s-meta {
            font-size: 11px;
            color: var(--text-secondary);
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .sidebar-list-item .sidebar-info .s-meta .hot {
            color: #f5624c;
            font-weight: 600;
        }

        /* Related category */
        .related-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 18px;
        }
        .related-card {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            padding: 20px;
            text-align: center;
            transition: all var(--transition);
            display: block;
            text-decoration: none;
            color: var(--text-primary);
        }
        .related-card:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-hover);
            border-color: var(--primary);
            color: var(--text-primary);
        }
        .related-card .related-icon {
            width: 52px;
            height: 52px;
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            margin: 0 auto 12px;
        }
        .related-card .related-icon.blue {
            background: rgba(31, 94, 255, 0.1);
            color: var(--primary);
        }
        .related-card .related-icon.teal {
            background: rgba(0, 217, 192, 0.12);
            color: #009e8f;
        }
        .related-card .related-icon.gold {
            background: rgba(255, 180, 0, 0.15);
            color: #d18f00;
        }
        .related-card .related-title {
            font-size: 16px;
            font-weight: 700;
            color: var(--dark);
            margin-bottom: 6px;
        }
        .related-card .related-desc {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        /* CTA section */
        .cta-section {
            background: linear-gradient(135deg, #1F5EFF 0%, #0F45D6 100%);
            border-radius: var(--radius-lg);
            padding: 44px 36px;
            color: #fff;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
            box-shadow: 0 12px 36px rgba(31, 94, 255, 0.3);
        }
        .cta-section .cta-text {
            flex: 1;
            min-width: 260px;
        }
        .cta-section .cta-text h2 {
            font-size: 26px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 10px;
            line-height: 1.3;
        }
        .cta-section .cta-text p {
            font-size: 15px;
            color: rgba(255, 255, 255, 0.85);
            line-height: 1.7;
            margin-bottom: 0;
        }
        .cta-section .cta-form {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
            align-items: center;
        }
        .cta-section .cta-form input[type="email"] {
            background: #fff;
            border: none;
            border-radius: 999px;
            padding: 13px 22px;
            font-size: 15px;
            color: var(--text-primary);
            width: 260px;
            box-shadow: inset 0 1px 3px rgba(0, 0, 0, 0.06);
            transition: all var(--transition);
        }
        .cta-section .cta-form input[type="email"]:focus {
            outline: 3px solid rgba(255, 255, 255, 0.35);
            outline-offset: 2px;
        }
        .cta-section .cta-form .btn-cta {
            background: #fff;
            color: var(--primary);
            border: none;
            border-radius: 999px;
            padding: 13px 28px;
            font-size: 15px;
            font-weight: 700;
            cursor: pointer;
            transition: all var(--transition);
            white-space: nowrap;
        }
        .cta-section .cta-form .btn-cta:hover,
        .cta-section .cta-form .btn-cta:focus {
            background: var(--secondary);
            color: var(--dark);
            transform: scale(0.97);
        }
        .cta-section .cta-form .btn-cta:active {
            transform: scale(0.96);
        }

        /* Support / FAQ */
        .faq-layout {
            display: grid;
            grid-template-columns: 1fr 1.8fr;
            gap: 32px;
            align-items: start;
        }
        .faq-left h3 {
            font-size: 24px;
            font-weight: 700;
            color: var(--dark);
            margin-bottom: 10px;
        }
        .faq-left p {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.7;
        }
        .faq-item {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            padding: 18px 22px;
            margin-bottom: 14px;
            transition: all var(--transition);
        }
        .faq-item:hover {
            border-color: var(--primary);
            box-shadow: var(--shadow-hover);
        }
        .faq-item .faq-question {
            font-size: 16px;
            font-weight: 600;
            color: var(--dark);
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            transition: color var(--transition);
        }
        .faq-item .faq-question:hover {
            color: var(--primary);
        }
        .faq-item .faq-question .faq-icon {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: rgba(31, 94, 255, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 12px;
            color: var(--primary);
            transition: all var(--transition);
            flex-shrink: 0;
        }
        .faq-item .faq-answer {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.75;
            margin-top: 10px;
            padding-top: 10px;
            border-top: 1px solid var(--border);
            display: none;
        }
        .faq-item.open .faq-answer {
            display: block;
        }
        .faq-item.open .faq-icon {
            transform: rotate(45deg);
            background: var(--primary);
            color: #fff;
        }

        /* Footer */
        .footer {
            background: var(--dark);
            color: rgba(255, 255, 255, 0.75);
            padding: 56px 0 28px;
            margin-top: 40px;
        }
        .footer .footer-grid {
            display: grid;
            grid-template-columns: 1.8fr 1fr 1.2fr 1.2fr;
            gap: 32px;
            margin-bottom: 36px;
        }
        .footer .footer-col h4 {
            color: #fff;
            font-size: 15px;
            font-weight: 700;
            margin-bottom: 16px;
        }
        .footer .footer-col a {
            display: block;
            color: rgba(255, 255, 255, 0.65);
            font-size: 14px;
            margin-bottom: 8px;
            text-decoration: none;
            transition: color var(--transition);
            line-height: 1.8;
        }
        .footer .footer-col a:hover,
        .footer .footer-col a:focus {
            color: #fff;
        }
        .footer .footer-col a i {
            margin-right: 8px;
            font-size: 13px;
            color: var(--secondary);
        }
        .footer-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 12px;
        }
        .footer-brand .logo-icon {
            width: 36px;
            height: 36px;
            background: var(--primary);
            color: #fff;
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
        }
        .footer .footer-col p {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.55);
            line-height: 1.75;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 20px;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.45);
        }
        .footer-bottom .copyright {
            font-size: 13px;
        }

        /* Pagination / view more */
        .view-more-wrap {
            text-align: right;
            margin-top: 10px;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .section {
                padding: 56px 0;
            }
            .page-hero h1 {
                font-size: 30px;
            }
            .list-card .card-tags {
                max-width: 130px;
            }
            .faq-layout {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .footer .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
        }
        @media (max-width: 768px) {
            .section {
                padding: 48px 0;
            }
            .page-hero {
                padding: 28px 0 36px;
            }
            .page-hero h1 {
                font-size: 24px;
            }
            .page-hero .hero-desc {
                font-size: 15px;
            }
            .nav-menu {
                display: none;
            }
            .nav-cta {
                display: none;
            }
            .hamburger {
                display: flex;
                align-items: center;
                justify-content: center;
            }
            .mobile-nav.active {
                display: flex;
            }
            .stats-bar {
                padding: 16px;
                gap: 10px;
            }
            .stats-item {
                padding: 2px 6px;
            }
            .stats-divider {
                display: none;
            }
            .list-card {
                flex-direction: column;
                align-items: flex-start;
                gap: 12px;
                padding: 14px;
            }
            .list-card .card-thumb {
                width: 100%;
                height: 140px;
            }
            .list-card .card-tags {
                max-width: 100%;
                width: 100%;
            }
            .cta-section {
                padding: 30px 22px;
                flex-direction: column;
                text-align: left;
            }
            .cta-section .cta-form input[type="email"] {
                width: 100%;
            }
            .cta-section .cta-form {
                width: 100%;
            }
            .cta-section .cta-form .btn-cta {
                width: 100%;
            }
            .footer .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .related-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .filter-toolbar {
                padding: 14px;
                gap: 8px;
            }
            .filter-tag {
                padding: 6px 12px;
                font-size: 12px;
            }
            .section-title {
                font-size: 22px;
                padding-left: 14px;
            }
        }
        @media (max-width: 520px) {
            .related-grid {
                grid-template-columns: 1fr;
            }
            .page-hero h1 {
                font-size: 21px;
            }
            .breadcrumb {
                font-size: 12px;
                gap: 5px;
            }
            .list-card .card-title {
                font-size: 15px;
            }
            .cta-section .cta-text h2 {
                font-size: 21px;
            }
            .section-title {
                font-size: 20px;
            }
        }

/* roulang page: category4 */
:root {
            --primary: #1F5EFF;
            --primary-hover: #0F45D6;
            --secondary: #00D9C0;
            --gold: #FFB400;
            --bg: #F5F8FC;
            --card-bg: #FFFFFF;
            --secondary-bg: #EAF0FA;
            --dark: #0E1A2F;
            --text-primary: #1B2A3F;
            --text-secondary: #5C6B85;
            --border: #E3EAF5;
            --radius: 14px;
            --radius-lg: 18px;
            --radius-sm: 8px;
            --shadow: 0 4px 16px rgba(16, 42, 90, 0.06);
            --shadow-hover: 0 12px 28px rgba(16, 42, 90, 0.12);
            --transition: 0.2s ease;
            --section-pad: 76px 0;
            --font-family: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-family);
            background: var(--bg);
            color: var(--text-primary);
            line-height: 1.75;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            margin: 0;
            padding: 0;
        }
        a {
            text-decoration: none;
            color: var(--primary);
            transition: color var(--transition);
        }
        a:hover,
        a:focus {
            color: var(--primary-hover);
            outline: none;
        }
        a:focus-visible {
            outline: 3px solid rgba(31, 94, 255, 0.25);
            outline-offset: 2px;
            border-radius: 4px;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-sm);
        }
        button,
        input {
            font-family: var(--font-family);
            font-size: 15px;
        }
        .row {
            max-width: 1200px;
        }
        .container-custom {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .section {
            padding: var(--section-pad);
        }
        .section-alt {
            background: var(--secondary-bg);
        }
        .section-dark {
            background: var(--dark);
            color: #fff;
        }
        .section-title {
            font-size: 30px;
            font-weight: 700;
            line-height: 1.3;
            color: var(--dark);
            margin-bottom: 14px;
            position: relative;
            padding-left: 16px;
        }
        .section-title::before {
            content: '';
            position: absolute;
            left: 0;
            top: 50%;
            transform: translateY(-50%);
            width: 4px;
            height: 24px;
            background: var(--primary);
            border-radius: 2px;
        }
        .section-subtitle {
            font-size: 16px;
            color: var(--text-secondary);
            margin-bottom: 36px;
            max-width: 720px;
            line-height: 1.7;
        }
        .tag {
            display: inline-block;
            background: rgba(0, 217, 192, 0.12);
            color: #009e8f;
            font-size: 12px;
            font-weight: 500;
            letter-spacing: 0.5px;
            padding: 4px 12px;
            border-radius: 999px;
            margin-right: 6px;
            margin-bottom: 6px;
            cursor: pointer;
            transition: all var(--transition);
            border: 1px solid transparent;
        }
        .tag:hover {
            background: rgba(0, 217, 192, 0.22);
            border-color: var(--secondary);
            color: #007a6b;
        }
        .tag.active-tag {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }
        .badge-gold {
            display: inline-block;
            background: var(--gold);
            color: var(--dark);
            font-size: 12px;
            font-weight: 600;
            padding: 3px 10px;
            border-radius: 999px;
            letter-spacing: 0.5px;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            border-radius: 999px;
            padding: 12px 26px;
            font-size: 15px;
            font-weight: 600;
            border: none;
            cursor: pointer;
            transition: all var(--transition);
            text-decoration: none;
            line-height: 1.4;
            white-space: nowrap;
        }
        .btn:focus-visible {
            outline: 3px solid rgba(31, 94, 255, 0.25);
            outline-offset: 3px;
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 14px rgba(31, 94, 255, 0.25);
        }
        .btn-primary:hover,
        .btn-primary:focus {
            background: var(--primary-hover);
            color: #fff;
            transform: scale(0.98);
            box-shadow: 0 6px 20px rgba(31, 94, 255, 0.35);
        }
        .btn-primary:active {
            transform: scale(0.97);
            box-shadow: 0 2px 8px rgba(31, 94, 255, 0.2);
        }
        .btn-secondary {
            background: #fff;
            color: var(--primary);
            border: 1px solid var(--primary);
        }
        .btn-secondary:hover,
        .btn-secondary:focus {
            background: var(--secondary-bg);
            color: var(--primary-hover);
            border-color: var(--primary-hover);
        }
        .btn-ghost {
            background: transparent;
            color: #fff;
            border: 1px solid rgba(255, 255, 255, 0.7);
        }
        .btn-ghost:hover,
        .btn-ghost:focus {
            background: rgba(255, 255, 255, 0.12);
            color: #fff;
        }
        .card {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            padding: 24px;
            transition: all var(--transition);
            height: 100%;
        }
        .card:hover {
            transform: translateY(-2px);
            box-shadow: var(--shadow-hover);
            border-color: var(--primary);
        }
        .card-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            margin-bottom: 16px;
            background: rgba(31, 94, 255, 0.08);
            color: var(--primary);
            flex-shrink: 0;
        }
        .card-icon.teal {
            background: rgba(0, 217, 192, 0.12);
            color: #009e8f;
        }
        .card-icon.gold {
            background: rgba(255, 180, 0, 0.15);
            color: #d18f00;
        }
        .card-icon.dark {
            background: rgba(14, 26, 47, 0.08);
            color: var(--dark);
        }
        /* Navigation */
        .nav-wrapper {
            position: sticky;
            top: 0;
            z-index: 100;
            padding-top: 12px;
        }
        .nav-card {
            background: var(--card-bg);
            border-radius: 16px;
            box-shadow: 0 4px 20px rgba(16, 42, 90, 0.08);
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 10px 20px;
            border: 1px solid var(--border);
            gap: 16px;
        }
        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 700;
            color: var(--dark);
            text-decoration: none;
            letter-spacing: 0.5px;
            white-space: nowrap;
        }
        .nav-logo:hover {
            color: var(--primary);
        }
        .logo-icon {
            width: 38px;
            height: 38px;
            border-radius: 10px;
            background: var(--primary);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            flex-shrink: 0;
        }
        .nav-menu {
            display: flex;
            list-style: none;
            margin: 0;
            padding: 0;
            gap: 4px;
            align-items: center;
        }
        .nav-menu li a {
            display: flex;
            align-items: center;
            gap: 6px;
            padding: 8px 14px;
            border-radius: 10px;
            font-size: 14px;
            font-weight: 600;
            color: var(--text-secondary);
            text-decoration: none;
            transition: all var(--transition);
            white-space: nowrap;
        }
        .nav-menu li a:hover,
        .nav-menu li a:focus {
            color: var(--primary);
            background: rgba(31, 94, 255, 0.06);
        }
        .nav-menu li a.active {
            color: #fff;
            background: var(--primary);
            box-shadow: 0 3px 10px rgba(31, 94, 255, 0.2);
        }
        .nav-icon {
            font-size: 14px;
        }
        .nav-cta {
            display: flex;
            align-items: center;
            flex-shrink: 0;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            font-size: 24px;
            color: var(--text-primary);
            cursor: pointer;
            padding: 8px;
            border-radius: 10px;
            transition: background var(--transition);
        }
        .hamburger:hover {
            background: rgba(31, 94, 255, 0.08);
        }
        .mobile-nav {
            display: none;
            flex-direction: column;
            background: var(--card-bg);
            border-radius: 12px;
            box-shadow: var(--shadow-hover);
            margin-top: 8px;
            padding: 12px;
            border: 1px solid var(--border);
            gap: 2px;
        }
        .mobile-nav a {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 12px 16px;
            border-radius: 10px;
            font-size: 15px;
            font-weight: 600;
            color: var(--text-secondary);
            text-decoration: none;
            transition: all var(--transition);
        }
        .mobile-nav a:hover,
        .mobile-nav a:focus {
            background: rgba(31, 94, 255, 0.06);
            color: var(--primary);
        }
        .mobile-nav a.active {
            background: var(--primary);
            color: #fff;
        }
        /* Breadcrumb */
        .breadcrumb-bar {
            background: var(--card-bg);
            border-bottom: 1px solid var(--border);
            padding: 16px 0;
            margin-top: 16px;
        }
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--text-secondary);
            list-style: none;
            margin: 0;
            padding: 0;
            flex-wrap: wrap;
        }
        .breadcrumb li {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .breadcrumb li:not(:last-child)::after {
            content: '/';
            color: var(--border);
            font-size: 12px;
        }
        .breadcrumb a {
            color: var(--text-secondary);
            text-decoration: none;
            transition: color var(--transition);
        }
        .breadcrumb a:hover {
            color: var(--primary);
        }
        .breadcrumb .current {
            color: var(--primary);
            font-weight: 600;
        }
        /* Hero for category page */
        .cat-hero {
            background: linear-gradient(135deg, #F5F8FC 0%, #EAF0FA 45%, #DCE7F8 100%);
            padding: 48px 0 36px;
            position: relative;
            overflow: hidden;
        }
        .cat-hero::after {
            content: '';
            position: absolute;
            bottom: -80px;
            right: -40px;
            width: 300px;
            height: 300px;
            background: rgba(31, 94, 255, 0.06);
            border-radius: 50%;
            z-index: 0;
        }
        .cat-hero .container-custom {
            position: relative;
            z-index: 1;
        }
        .cat-hero h1 {
            font-size: 36px;
            font-weight: 700;
            color: var(--dark);
            margin-bottom: 10px;
            line-height: 1.25;
        }
        .cat-hero p {
            font-size: 16px;
            color: var(--text-secondary);
            max-width: 680px;
            line-height: 1.7;
            margin-bottom: 0;
        }
        .hero-stat-chip {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(31, 94, 255, 0.08);
            color: var(--primary);
            font-size: 13px;
            font-weight: 600;
            padding: 6px 14px;
            border-radius: 999px;
            margin-right: 8px;
            margin-bottom: 6px;
        }
        /* Stats strip */
        .stats-strip {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            margin-top: 28px;
        }
        .stat-badge-card {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: 12px;
            padding: 16px 20px;
            display: flex;
            align-items: center;
            gap: 14px;
            box-shadow: var(--shadow);
            min-width: 150px;
            flex: 1 1 0;
        }
        .stat-badge-icon {
            width: 44px;
            height: 44px;
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            background: rgba(31, 94, 255, 0.08);
            color: var(--primary);
            flex-shrink: 0;
        }
        .stat-badge-icon.teal {
            background: rgba(0, 217, 192, 0.12);
            color: #009e8f;
        }
        .stat-badge-icon.gold {
            background: rgba(255, 180, 0, 0.15);
            color: #d18f00;
        }
        .stat-badge-icon.dark {
            background: rgba(14, 26, 47, 0.08);
            color: var(--dark);
        }
        .stat-badge-info h4 {
            font-size: 22px;
            font-weight: 700;
            color: var(--dark);
            margin: 0;
            line-height: 1.3;
        }
        .stat-badge-info span {
            font-size: 13px;
            color: var(--text-secondary);
            letter-spacing: 0.3px;
        }
        /* Filter tool bar */
        .filter-bar {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: 14px;
            box-shadow: var(--shadow);
            padding: 18px 20px;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 12px;
            justify-content: space-between;
        }
        .filter-group {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 8px;
        }
        .filter-label {
            font-size: 13px;
            font-weight: 600;
            color: var(--text-secondary);
            letter-spacing: 0.5px;
            margin-right: 4px;
            white-space: nowrap;
        }
        .filter-select {
            border: 1px solid var(--border);
            border-radius: 8px;
            padding: 8px 14px;
            font-size: 14px;
            background: #fff;
            color: var(--text-primary);
            cursor: pointer;
            transition: border-color var(--transition);
            font-family: var(--font-family);
        }
        .filter-select:focus {
            border-color: var(--primary);
            outline: none;
        }
        /* Ranking list cards */
        .ranking-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .rank-list-card {
            display: flex;
            gap: 16px;
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: 12px;
            padding: 18px;
            box-shadow: var(--shadow);
            transition: all var(--transition);
            align-items: center;
        }
        .rank-list-card:hover {
            border-color: var(--primary);
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }
        .rank-thumb {
            width: 100px;
            height: 76px;
            border-radius: 10px;
            overflow: hidden;
            flex-shrink: 0;
            background: var(--secondary-bg);
        }
        .rank-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: 10px;
        }
        .rank-info {
            flex: 1;
            min-width: 0;
        }
        .rank-info h3 {
            font-size: 17px;
            font-weight: 600;
            color: var(--dark);
            margin: 0 0 4px;
            line-height: 1.4;
        }
        .rank-info p {
            font-size: 14px;
            color: var(--text-secondary);
            margin: 0 0 6px;
            line-height: 1.55;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .rank-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            align-items: center;
        }
        .rank-meta span {
            font-size: 12px;
            color: var(--text-secondary);
            display: flex;
            align-items: center;
            gap: 4px;
        }
        .rank-meta i {
            font-size: 12px;
            color: #a0aec0;
        }
        .rank-position {
            flex-shrink: 0;
            text-align: center;
            min-width: 56px;
        }
        .rank-position .num {
            font-size: 30px;
            font-weight: 700;
            color: var(--primary);
            line-height: 1.1;
        }
        .rank-position .num.top1 {
            color: var(--gold);
        }
        .rank-position .num.top2 {
            color: #C0C0C0;
        }
        .rank-position .num.top3 {
            color: #CD7F32;
        }
        .rank-position .label {
            font-size: 11px;
            color: var(--text-secondary);
            letter-spacing: 0.5px;
        }
        .rank-tag-right {
            flex-shrink: 0;
            display: flex;
            flex-direction: column;
            align-items: flex-end;
            gap: 6px;
        }
        .heat-badge {
            font-size: 12px;
            color: var(--text-secondary);
            display: flex;
            align-items: center;
            gap: 4px;
        }
        /* Sidebar */
        .sidebar-card {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            padding: 20px;
            margin-bottom: 20px;
        }
        .sidebar-card h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--dark);
            margin: 0 0 14px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .sidebar-card h3 i {
            color: var(--primary);
            font-size: 18px;
        }
        .sidebar-list-item {
            display: flex;
            gap: 10px;
            padding: 10px 0;
            border-bottom: 1px solid var(--border);
            align-items: center;
            transition: background var(--transition);
            border-radius: 6px;
            padding-left: 6px;
            padding-right: 6px;
        }
        .sidebar-list-item:hover {
            background: rgba(31, 94, 255, 0.04);
        }
        .sidebar-list-item:last-child {
            border-bottom: none;
        }
        .sidebar-list-num {
            font-size: 16px;
            font-weight: 700;
            color: var(--primary);
            width: 24px;
            text-align: center;
            flex-shrink: 0;
        }
        .sidebar-list-info {
            flex: 1;
            min-width: 0;
        }
        .sidebar-list-info h4 {
            font-size: 14px;
            font-weight: 600;
            color: var(--text-primary);
            margin: 0 0 2px;
            line-height: 1.4;
        }
        .sidebar-list-info span {
            font-size: 12px;
            color: var(--text-secondary);
        }
        /* Related topics */
        .topic-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 16px;
        }
        .topic-card {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            padding: 20px;
            text-align: left;
            transition: all var(--transition);
            text-decoration: none;
            color: var(--text-primary);
            display: flex;
            align-items: center;
            gap: 14px;
        }
        .topic-card:hover {
            border-color: var(--primary);
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
            color: var(--text-primary);
        }
        .topic-card-icon {
            width: 46px;
            height: 46px;
            border-radius: 10px;
            background: rgba(31, 94, 255, 0.08);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            flex-shrink: 0;
        }
        .topic-card-icon.teal {
            background: rgba(0, 217, 192, 0.12);
            color: #009e8f;
        }
        .topic-card-icon.gold {
            background: rgba(255, 180, 0, 0.15);
            color: #d18f00;
        }
        .topic-card-info h4 {
            font-size: 15px;
            font-weight: 600;
            color: var(--dark);
            margin: 0 0 4px;
        }
        .topic-card-info p {
            font-size: 13px;
            color: var(--text-secondary);
            margin: 0;
            line-height: 1.5;
        }
        /* CTA section */
        .cta-section {
            background: linear-gradient(135deg, #1F5EFF 0%, #0F45D6 100%);
            border-radius: 18px;
            padding: 48px 40px;
            color: #fff;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
            box-shadow: 0 12px 32px rgba(31, 94, 255, 0.25);
        }
        .cta-section h2 {
            font-size: 24px;
            font-weight: 700;
            margin: 0 0 8px;
            line-height: 1.3;
            color: #fff;
        }
        .cta-section p {
            font-size: 15px;
            margin: 0;
            color: rgba(255, 255, 255, 0.85);
            line-height: 1.6;
            max-width: 520px;
        }
        .cta-input-group {
            display: flex;
            gap: 10px;
            flex-wrap: wrap;
            align-items: center;
        }
        .cta-input {
            background: #fff;
            border: none;
            border-radius: 999px;
            padding: 13px 22px;
            font-size: 15px;
            color: var(--text-primary);
            width: 260px;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
            transition: all var(--transition);
        }
        .cta-input:focus {
            outline: 3px solid rgba(255, 255, 255, 0.4);
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12);
        }
        .btn-white {
            background: #fff;
            color: var(--primary);
            box-shadow: 0 4px 14px rgba(0, 0, 0, 0.15);
        }
        .btn-white:hover {
            background: #f0f4ff;
            color: var(--primary-hover);
            transform: scale(0.98);
        }
        /* FAQ */
        .faq-wrapper {
            display: grid;
            grid-template-columns: 1fr 2fr;
            gap: 40px;
            align-items: start;
        }
        .faq-left h3 {
            font-size: 26px;
            font-weight: 700;
            color: var(--dark);
            margin: 0 0 10px;
        }
        .faq-left p {
            font-size: 15px;
            color: var(--text-secondary);
            margin: 0;
            line-height: 1.7;
        }
        .faq-accordion-item {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: 10px;
            margin-bottom: 10px;
            overflow: hidden;
            transition: all var(--transition);
        }
        .faq-accordion-item:hover {
            border-color: var(--primary);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 16px 20px;
            cursor: pointer;
            font-size: 15px;
            font-weight: 600;
            color: var(--text-primary);
            gap: 12px;
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            font-family: var(--font-family);
            transition: all var(--transition);
        }
        .faq-question:hover {
            color: var(--primary);
        }
        .faq-question i {
            font-size: 16px;
            transition: transform var(--transition);
            flex-shrink: 0;
            color: var(--text-secondary);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease;
            padding: 0 20px;
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
        }
        .faq-answer.open {
            max-height: 200px;
            padding-bottom: 16px;
        }
        .faq-accordion-item.active .faq-question i {
            transform: rotate(180deg);
            color: var(--primary);
        }
        /* Footer */
        .footer {
            background: var(--dark);
            color: #fff;
            padding: 56px 0 28px;
            margin-top: 48px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.2fr 0.8fr 0.9fr 1fr;
            gap: 32px;
            margin-bottom: 32px;
        }
        .footer-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 12px;
        }
        .footer-brand .logo-icon {
            background: var(--primary);
        }
        .footer-col h4 {
            font-size: 15px;
            font-weight: 600;
            margin-bottom: 14px;
            color: rgba(255, 255, 255, 0.9);
            letter-spacing: 0.5px;
        }
        .footer-col p {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.6);
            line-height: 1.7;
            margin: 0;
        }
        .footer-col a {
            display: block;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.65);
            text-decoration: none;
            padding: 5px 0;
            transition: color var(--transition);
        }
        .footer-col a:hover,
        .footer-col a:focus {
            color: #fff;
        }
        .footer-col a i {
            width: 18px;
            margin-right: 6px;
            font-size: 13px;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 20px;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 10px;
            font-size: 13px;
        }
        .footer-bottom .copyright {
            color: rgba(255, 255, 255, 0.7);
        }
        /* Responsive */
        @media (max-width: 1024px) {
            .topic-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .faq-wrapper {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 24px;
            }
        }
        @media (max-width: 768px) {
            :root {
                --section-pad: 48px 0;
            }
            .nav-menu {
                display: none;
            }
            .nav-cta {
                display: none;
            }
            .hamburger {
                display: block;
            }
            .mobile-nav.show {
                display: flex;
            }
            .cat-hero h1 {
                font-size: 28px;
            }
            .stats-strip {
                flex-direction: column;
                gap: 10px;
            }
            .stat-badge-card {
                min-width: 100%;
            }
            .filter-bar {
                flex-direction: column;
                align-items: flex-start;
                gap: 10px;
            }
            .rank-list-card {
                flex-wrap: wrap;
            }
            .rank-thumb {
                width: 100%;
                height: 160px;
            }
            .rank-info {
                width: 100%;
            }
            .rank-position {
                min-width: 48px;
            }
            .rank-position .num {
                font-size: 24px;
            }
            .topic-grid {
                grid-template-columns: 1fr;
            }
            .cta-section {
                flex-direction: column;
                text-align: center;
                padding: 32px 24px;
            }
            .cta-input {
                width: 100%;
            }
            .cta-input-group {
                width: 100%;
                flex-direction: column;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
                gap: 6px;
            }
            .breadcrumb {
                font-size: 13px;
            }
        }
        @media (max-width: 520px) {
            .nav-card {
                padding: 8px 14px;
            }
            .nav-logo {
                font-size: 19px;
            }
            .logo-icon {
                width: 32px;
                height: 32px;
                font-size: 15px;
            }
            .cat-hero {
                padding: 36px 0 24px;
            }
            .cat-hero h1 {
                font-size: 24px;
            }
            .cat-hero p {
                font-size: 14px;
            }
            .section-title {
                font-size: 24px;
                padding-left: 14px;
            }
            .section-title::before {
                height: 20px;
            }
            .stat-badge-info h4 {
                font-size: 18px;
            }
            .rank-position .num {
                font-size: 20px;
            }
            .rank-list-card {
                padding: 14px;
            }
            .cta-section h2 {
                font-size: 20px;
            }
            .cta-section p {
                font-size: 14px;
            }
            .cta-input {
                padding: 12px 18px;
                font-size: 14px;
            }
        }

/* roulang page: category3 */
:root {
            --primary: #1F5EFF;
            --primary-hover: #0F45D6;
            --secondary: #00D9C0;
            --gold: #FFB400;
            --bg: #F5F8FC;
            --card-bg: #FFFFFF;
            --secondary-bg: #EAF0FA;
            --dark: #0E1A2F;
            --text-primary: #1B2A3F;
            --text-secondary: #5C6B85;
            --border: #E3EAF5;
            --radius: 14px;
            --radius-lg: 18px;
            --radius-sm: 8px;
            --shadow: 0 4px 16px rgba(16, 42, 90, 0.06);
            --shadow-hover: 0 12px 28px rgba(16, 42, 90, 0.12);
            --transition: 0.2s ease;
            --section-pad: 76px 0;
            --font-family: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-family);
            background: var(--bg);
            color: var(--text-primary);
            line-height: 1.75;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            margin: 0;
            padding: 0;
        }
        a {
            text-decoration: none;
            color: var(--primary);
            transition: color var(--transition);
        }
        a:hover,
        a:focus {
            color: var(--primary-hover);
            outline: none;
        }
        a:focus-visible {
            outline: 3px solid rgba(31, 94, 255, 0.25);
            outline-offset: 2px;
            border-radius: 4px;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-sm);
        }
        button,
        input {
            font-family: var(--font-family);
            font-size: 15px;
        }
        .row {
            max-width: 1200px;
            margin-left: auto;
            margin-right: auto;
        }
        .container-custom {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .section {
            padding: var(--section-pad);
        }
        .section-alt {
            background: var(--secondary-bg);
        }
        .section-dark {
            background: var(--dark);
            color: #fff;
        }
        .section-title {
            font-size: 30px;
            font-weight: 700;
            line-height: 1.3;
            color: var(--dark);
            margin-bottom: 14px;
            position: relative;
            padding-left: 16px;
        }
        .section-title::before {
            content: '';
            position: absolute;
            left: 0;
            top: 50%;
            transform: translateY(-50%);
            width: 4px;
            height: 24px;
            background: var(--primary);
            border-radius: 2px;
        }
        .section-subtitle {
            font-size: 16px;
            color: var(--text-secondary);
            margin-bottom: 36px;
            max-width: 720px;
            line-height: 1.7;
        }
        .tag {
            display: inline-block;
            background: rgba(0, 217, 192, 0.12);
            color: #009e8f;
            font-size: 12px;
            font-weight: 500;
            letter-spacing: 0.5px;
            padding: 4px 12px;
            border-radius: 999px;
            margin-right: 6px;
            margin-bottom: 6px;
        }
        .badge-gold {
            display: inline-block;
            background: var(--gold);
            color: var(--dark);
            font-size: 12px;
            font-weight: 600;
            padding: 3px 10px;
            border-radius: 999px;
            letter-spacing: 0.5px;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            border-radius: 999px;
            padding: 12px 26px;
            font-size: 15px;
            font-weight: 600;
            border: none;
            cursor: pointer;
            transition: all var(--transition);
            text-decoration: none;
            line-height: 1.4;
            white-space: nowrap;
        }
        .btn:focus-visible {
            outline: 3px solid rgba(31, 94, 255, 0.25);
            outline-offset: 3px;
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 14px rgba(31, 94, 255, 0.25);
        }
        .btn-primary:hover,
        .btn-primary:focus {
            background: var(--primary-hover);
            color: #fff;
            transform: scale(0.98);
            box-shadow: 0 6px 20px rgba(31, 94, 255, 0.35);
        }
        .btn-primary:active {
            transform: scale(0.97);
            box-shadow: 0 2px 8px rgba(31, 94, 255, 0.2);
        }
        .btn-secondary {
            background: #fff;
            color: var(--primary);
            border: 1px solid var(--primary);
        }
        .btn-secondary:hover,
        .btn-secondary:focus {
            background: var(--secondary-bg);
            color: var(--primary-hover);
            border-color: var(--primary-hover);
        }
        .btn-ghost {
            background: transparent;
            color: #fff;
            border: 1px solid rgba(255, 255, 255, 0.7);
        }
        .btn-ghost:hover,
        .btn-ghost:focus {
            background: rgba(255, 255, 255, 0.12);
            color: #fff;
        }
        .card {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            padding: 24px;
            transition: all var(--transition);
            height: 100%;
        }
        .card:hover {
            transform: translateY(-2px);
            box-shadow: var(--shadow-hover);
            border-color: var(--primary);
        }
        .card-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            margin-bottom: 16px;
            background: rgba(31, 94, 255, 0.08);
            color: var(--primary);
            flex-shrink: 0;
        }
        .card-icon.teal {
            background: rgba(0, 217, 192, 0.12);
            color: #009e8f;
        }
        .card-icon.gold {
            background: rgba(255, 180, 0, 0.15);
            color: #d18f00;
        }
        /* 导航样式 */
        .nav-wrapper {
            padding: 12px 20px 0;
            position: relative;
            z-index: 100;
        }
        .nav-card {
            max-width: 1200px;
            margin: 0 auto;
            background: #fff;
            border-radius: 16px;
            box-shadow: 0 4px 20px rgba(16, 42, 90, 0.08);
            padding: 12px 20px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            flex-wrap: wrap;
            border: 1px solid var(--border);
        }
        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 700;
            color: var(--dark);
            text-decoration: none;
        }
        .logo-icon {
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: var(--primary);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            flex-shrink: 0;
        }
        .nav-menu {
            display: flex;
            align-items: center;
            gap: 6px;
            list-style: none;
            margin: 0;
            padding: 0;
            flex-wrap: wrap;
        }
        .nav-menu li a {
            display: flex;
            align-items: center;
            gap: 6px;
            padding: 8px 14px;
            border-radius: 10px;
            font-size: 14px;
            font-weight: 600;
            color: var(--text-secondary);
            text-decoration: none;
            transition: all var(--transition);
            white-space: nowrap;
        }
        .nav-menu li a:hover,
        .nav-menu li a:focus {
            background: var(--secondary-bg);
            color: var(--primary);
        }
        .nav-menu li a.active {
            background: rgba(31, 94, 255, 0.08);
            color: var(--primary);
        }
        .nav-icon {
            font-size: 14px;
            width: 18px;
            text-align: center;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            font-size: 24px;
            color: var(--dark);
            cursor: pointer;
            padding: 8px;
            border-radius: 8px;
            transition: background var(--transition);
        }
        .hamburger:hover,
        .hamburger:focus {
            background: var(--secondary-bg);
            outline: none;
        }
        .mobile-nav {
            display: none;
            max-width: 1200px;
            margin: 8px auto 0;
            background: #fff;
            border-radius: 16px;
            box-shadow: 0 4px 20px rgba(16, 42, 90, 0.08);
            padding: 12px;
            border: 1px solid var(--border);
            flex-direction: column;
            gap: 4px;
        }
        .mobile-nav a {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 12px 14px;
            border-radius: 10px;
            font-size: 15px;
            font-weight: 600;
            color: var(--text-secondary);
            text-decoration: none;
            transition: all var(--transition);
        }
        .mobile-nav a:hover,
        .mobile-nav a:focus {
            background: var(--secondary-bg);
            color: var(--primary);
        }
        .mobile-nav a.active {
            background: rgba(31, 94, 255, 0.08);
            color: var(--primary);
        }
        .nav-cta {
            flex-shrink: 0;
        }
        /* Hero区域 */
        .hero-zhandui {
            background: linear-gradient(135deg, #F5F8FC 0%, #EAF0FA 60%, rgba(31, 94, 255, 0.03) 100%);
            padding: 48px 0 56px;
            position: relative;
            overflow: hidden;
        }
        .hero-zhandui::before {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 8%;
            background: linear-gradient(to bottom, rgba(14, 26, 47, 0), rgba(14, 26, 47, 0.06));
            pointer-events: none;
        }
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--text-secondary);
            margin-bottom: 20px;
            flex-wrap: wrap;
        }
        .breadcrumb a {
            color: var(--text-secondary);
            text-decoration: none;
            transition: color var(--transition);
        }
        .breadcrumb a:hover,
        .breadcrumb a:focus {
            color: var(--primary);
        }
        .breadcrumb .sep {
            color: #B8C4D8;
            font-size: 12px;
        }
        .breadcrumb .current {
            color: var(--text-primary);
            font-weight: 600;
        }
        .hero-zhandui h1 {
            font-size: 38px;
            font-weight: 700;
            line-height: 1.2;
            color: var(--dark);
            margin-bottom: 12px;
            letter-spacing: 0.5px;
        }
        .hero-zhandui .hero-desc {
            font-size: 16px;
            color: var(--text-secondary);
            max-width: 760px;
            line-height: 1.7;
            margin-bottom: 28px;
        }
        /* 路线图 */
        .roadmap-section {
            background: #fff;
            border-radius: var(--radius-lg);
            padding: 28px 24px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
            margin-bottom: 24px;
        }
        .roadmap-title {
            font-size: 18px;
            font-weight: 600;
            color: var(--dark);
            margin-bottom: 20px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .roadmap-title i {
            color: var(--primary);
        }
        .roadmap-nodes {
            display: flex;
            gap: 0;
            align-items: stretch;
            flex-wrap: wrap;
            position: relative;
        }
        .roadmap-nodes::before {
            content: '';
            position: absolute;
            top: 20px;
            left: 40px;
            right: 40px;
            height: 3px;
            background: var(--secondary-bg);
            border-radius: 2px;
            z-index: 0;
        }
        .rm-node {
            flex: 1;
            min-width: 140px;
            text-align: center;
            position: relative;
            z-index: 1;
            padding: 0 10px;
        }
        .rm-dot {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: #fff;
            border: 3px solid var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            color: var(--primary);
            margin: 0 auto 12px;
            position: relative;
            z-index: 2;
            box-shadow: 0 0 0 6px rgba(31, 94, 255, 0.08);
        }
        .rm-node.done .rm-dot {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }
        .rm-node.current .rm-dot {
            background: var(--secondary);
            color: var(--dark);
            border-color: var(--secondary);
            box-shadow: 0 0 0 6px rgba(0, 217, 192, 0.15);
        }
        .rm-node h4 {
            font-size: 16px;
            font-weight: 600;
            color: var(--dark);
            margin-bottom: 4px;
            line-height: 1.3;
        }
        .rm-node p {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.5;
            margin-bottom: 0;
        }
        .rm-time {
            display: inline-block;
            font-size: 12px;
            font-weight: 500;
            color: var(--primary);
            background: rgba(31, 94, 255, 0.08);
            padding: 2px 10px;
            border-radius: 999px;
            margin-bottom: 6px;
        }
        /* 订阅条 */
        .subscribe-bar {
            display: flex;
            align-items: center;
            gap: 16px;
            flex-wrap: wrap;
            background: var(--dark);
            border-radius: var(--radius-lg);
            padding: 24px 28px;
            color: #fff;
            box-shadow: 0 8px 24px rgba(14, 26, 47, 0.2);
        }
        .subscribe-bar .sub-text {
            flex: 1;
            min-width: 200px;
        }
        .subscribe-bar .sub-text h3 {
            font-size: 18px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 4px;
            line-height: 1.3;
        }
        .subscribe-bar .sub-text p {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.65);
            margin-bottom: 0;
        }
        .subscribe-form {
            display: flex;
            gap: 10px;
            align-items: center;
            flex-wrap: wrap;
        }
        .subscribe-form label {
            color: rgba(255, 255, 255, 0.8);
            font-size: 14px;
            font-weight: 500;
            white-space: nowrap;
        }
        .subscribe-form input[type="email"] {
            background: rgba(255, 255, 255, 0.1);
            border: 1px solid rgba(255, 255, 255, 0.25);
            border-radius: 999px;
            padding: 11px 20px;
            color: #fff;
            font-size: 14px;
            min-width: 220px;
            max-width: 280px;
            outline: none;
            transition: all var(--transition);
        }
        .subscribe-form input[type="email"]::placeholder {
            color: rgba(255, 255, 255, 0.4);
        }
        .subscribe-form input[type="email"]:focus {
            border-color: var(--secondary);
            box-shadow: 0 0 0 3px rgba(0, 217, 192, 0.2);
            background: rgba(255, 255, 255, 0.15);
        }
        .subscribe-form .btn-ghost {
            border-color: var(--secondary);
            color: var(--secondary);
        }
        .subscribe-form .btn-ghost:hover,
        .subscribe-form .btn-ghost:focus {
            background: rgba(0, 217, 192, 0.12);
            color: #fff;
        }
        /* 统计条 */
        .stats-bar {
            display: flex;
            gap: 20px;
            flex-wrap: wrap;
            justify-content: space-between;
            padding: 0;
            margin-bottom: 32px;
        }
        .stat-item {
            flex: 1;
            min-width: 140px;
            background: #fff;
            border-radius: var(--radius);
            padding: 20px 18px;
            text-align: center;
            border: 1px solid var(--border);
            box-shadow: var(--shadow);
            transition: all var(--transition);
        }
        .stat-item:hover {
            transform: translateY(-2px);
            box-shadow: var(--shadow-hover);
            border-color: var(--primary);
        }
        .stat-num {
            font-size: 28px;
            font-weight: 700;
            color: var(--primary);
            line-height: 1.2;
            margin-bottom: 4px;
        }
        .stat-label {
            font-size: 13px;
            color: var(--text-secondary);
            font-weight: 500;
        }
        /* 筛选标签 */
        .filter-toolbar {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
            margin-bottom: 24px;
            padding: 16px 18px;
            background: #fff;
            border-radius: var(--radius);
            border: 1px solid var(--border);
            box-shadow: var(--shadow);
        }
        .filter-label {
            font-size: 14px;
            font-weight: 600;
            color: var(--text-secondary);
            margin-right: 8px;
            white-space: nowrap;
        }
        .filter-chip {
            padding: 6px 14px;
            border-radius: 999px;
            font-size: 13px;
            font-weight: 500;
            background: var(--secondary-bg);
            color: var(--text-secondary);
            border: 1px solid transparent;
            cursor: pointer;
            transition: all var(--transition);
            white-space: nowrap;
        }
        .filter-chip:hover,
        .filter-chip:focus {
            background: rgba(31, 94, 255, 0.08);
            color: var(--primary);
            outline: none;
            border-color: rgba(31, 94, 255, 0.2);
        }
        .filter-chip.active {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }
        /* 战队卡片 */
        .team-card {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            overflow: hidden;
            transition: all var(--transition);
            height: 100%;
            display: flex;
            flex-direction: column;
        }
        .team-card:hover {
            transform: translateY(-2px);
            box-shadow: var(--shadow-hover);
            border-color: var(--primary);
        }
        .team-card-img-wrap {
            position: relative;
            overflow: hidden;
            aspect-ratio: 16/9;
        }
        .team-card-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: 0;
            transition: transform 0.4s ease;
        }
        .team-card:hover .team-card-img-wrap img {
            transform: scale(1.05);
        }
        .team-card-body {
            padding: 18px 20px 20px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }
        .team-card-top {
            display: flex;
            align-items: flex-start;
            justify-content: space-between;
            gap: 10px;
            margin-bottom: 8px;
        }
        .team-card h3 {
            font-size: 18px;
            font-weight: 600;
            line-height: 1.35;
            color: var(--dark);
            margin-bottom: 6px;
        }
        .team-card .team-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 4px;
            margin-bottom: 10px;
        }
        .team-card .team-summary {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
            flex: 1;
            margin-bottom: 12px;
        }
        .team-card .team-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 12px;
            color: #8A99B5;
            border-top: 1px solid var(--border);
            padding-top: 12px;
            margin-top: auto;
        }
        .team-card .team-meta .heat {
            display: flex;
            align-items: center;
            gap: 4px;
            color: var(--gold);
            font-weight: 600;
        }
        .team-card .team-meta .heat i {
            font-size: 14px;
        }
        /* 热门侧栏 */
        .hot-sidebar {
            background: #fff;
            border-radius: var(--radius);
            border: 1px solid var(--border);
            box-shadow: var(--shadow);
            padding: 20px;
            position: sticky;
            top: 100px;
        }
        .hot-sidebar h3 {
            font-size: 18px;
            font-weight: 600;
            color: var(--dark);
            margin-bottom: 16px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .hot-sidebar h3 i {
            color: var(--gold);
        }
        .hot-item {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 10px 0;
            border-bottom: 1px solid var(--border);
            transition: all var(--transition);
        }
        .hot-item:last-child {
            border-bottom: none;
        }
        .hot-item:hover {
            padding-left: 4px;
        }
        .hot-rank {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: var(--secondary-bg);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 13px;
            font-weight: 700;
            color: var(--text-secondary);
            flex-shrink: 0;
        }
        .hot-rank.top1 {
            background: var(--gold);
            color: var(--dark);
        }
        .hot-rank.top2 {
            background: #E8EDF6;
            color: var(--dark);
        }
        .hot-rank.top3 {
            background: #F2D9B0;
            color: #6B4E00;
        }
        .hot-info {
            flex: 1;
        }
        .hot-info .hot-name {
            font-size: 14px;
            font-weight: 600;
            color: var(--dark);
            line-height: 1.3;
        }
        .hot-info .hot-detail {
            font-size: 12px;
            color: var(--text-secondary);
        }
        .hot-item .fa-chevron-right {
            font-size: 12px;
            color: #B8C4D8;
            transition: color var(--transition);
        }
        .hot-item:hover .fa-chevron-right {
            color: var(--primary);
        }
        /* 相关专题入口 */
        .related-topics {
            display: flex;
            gap: 20px;
            flex-wrap: wrap;
        }
        .topic-link-card {
            flex: 1;
            min-width: 180px;
            background: #fff;
            border-radius: var(--radius);
            border: 1px solid var(--border);
            padding: 22px 18px;
            display: flex;
            align-items: center;
            gap: 14px;
            text-decoration: none;
            transition: all var(--transition);
            box-shadow: var(--shadow);
        }
        .topic-link-card:hover,
        .topic-link-card:focus {
            transform: translateY(-2px);
            box-shadow: var(--shadow-hover);
            border-color: var(--primary);
            text-decoration: none;
        }
        .topic-link-card .topic-icon {
            width: 44px;
            height: 44px;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            flex-shrink: 0;
        }
        .topic-link-card .topic-icon.blue {
            background: rgba(31, 94, 255, 0.08);
            color: var(--primary);
        }
        .topic-link-card .topic-icon.teal {
            background: rgba(0, 217, 192, 0.12);
            color: #009e8f;
        }
        .topic-link-card .topic-icon.gold {
            background: rgba(255, 180, 0, 0.15);
            color: #d18f00;
        }
        .topic-link-card .topic-info h4 {
            font-size: 16px;
            font-weight: 600;
            color: var(--dark);
            margin-bottom: 2px;
        }
        .topic-link-card .topic-info p {
            font-size: 13px;
            color: var(--text-secondary);
            margin-bottom: 0;
        }
        /* 支撑内容 */
        .guide-list {
            display: flex;
            gap: 20px;
            flex-wrap: wrap;
        }
        .guide-item {
            flex: 1;
            min-width: 220px;
            background: #fff;
            border-radius: var(--radius);
            border: 1px solid var(--border);
            padding: 22px;
            box-shadow: var(--shadow);
            transition: all var(--transition);
        }
        .guide-item:hover {
            transform: translateY(-2px);
            box-shadow: var(--shadow-hover);
            border-color: var(--primary);
        }
        .guide-item .guide-icon {
            width: 40px;
            height: 40px;
            border-radius: 10px;
            background: rgba(31, 94, 255, 0.08);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            margin-bottom: 14px;
        }
        .guide-item h4 {
            font-size: 16px;
            font-weight: 600;
            color: var(--dark);
            margin-bottom: 8px;
        }
        .guide-item p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.65;
            margin-bottom: 0;
        }
        /* 页脚 */
        .footer {
            background: var(--dark);
            color: rgba(255, 255, 255, 0.7);
            padding: 56px 0 28px;
            margin-top: 0;
        }
        .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: 18px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 14px;
        }
        .footer-brand .logo-icon {
            width: 32px;
            height: 32px;
            font-size: 16px;
            border-radius: 8px;
        }
        .footer-col h4 {
            font-size: 15px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 14px;
        }
        .footer-col a {
            display: block;
            color: rgba(255, 255, 255, 0.6);
            text-decoration: none;
            font-size: 14px;
            padding: 4px 0;
            transition: color var(--transition);
        }
        .footer-col a:hover,
        .footer-col a:focus {
            color: var(--secondary);
        }
        .footer-col a i {
            width: 18px;
            text-align: center;
            margin-right: 4px;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 20px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 10px;
            font-size: 13px;
        }
        .copyright {
            color: rgba(255, 255, 255, 0.5);
        }
        /* 响应式 */
        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .hot-sidebar {
                position: static;
                margin-top: 24px;
            }
            .hero-zhandui h1 {
                font-size: 32px;
            }
        }
        @media (max-width: 768px) {
            .nav-card {
                flex-wrap: nowrap;
            }
            .nav-menu {
                display: none;
            }
            .hamburger {
                display: block;
            }
            .mobile-nav {
                display: flex;
            }
            .mobile-nav.collapsed {
                display: none;
            }
            .nav-cta {
                display: none;
            }
            .hero-zhandui {
                padding: 32px 0 40px;
            }
            .hero-zhandui h1 {
                font-size: 26px;
            }
            .roadmap-nodes {
                flex-direction: column;
                gap: 16px;
            }
            .roadmap-nodes::before {
                left: 20px;
                right: auto;
                top: 20px;
                bottom: 20px;
                width: 3px;
                height: auto;
            }
            .rm-node {
                text-align: left;
                padding-left: 52px;
                min-width: auto;
            }
            .rm-dot {
                position: absolute;
                left: 0;
                top: 0;
                margin: 0;
                width: 40px;
                height: 40px;
                z-index: 2;
            }
            .rm-node {
                position: relative;
                padding-left: 56px;
                padding-bottom: 8px;
            }
            .rm-node h4,
            .rm-node p,
            .rm-time {
                text-align: left;
            }
            .subscribe-bar {
                padding: 20px;
                flex-direction: column;
                align-items: flex-start;
            }
            .subscribe-form {
                width: 100%;
                flex-direction: column;
                align-items: stretch;
            }
            .subscribe-form input[type="email"] {
                max-width: none;
                width: 100%;
                min-width: auto;
            }
            .section-title {
                font-size: 24px;
            }
            .stats-bar {
                gap: 12px;
            }
            .stat-item {
                min-width: calc(50% - 6px);
                padding: 16px 12px;
            }
            .stat-num {
                font-size: 22px;
            }
            .filter-toolbar {
                padding: 12px 14px;
            }
            .topic-link-card {
                min-width: 100%;
            }
            .guide-item {
                min-width: 100%;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }
        @media (max-width: 520px) {
            .section {
                padding: 48px 0;
            }
            .stats-bar {
                gap: 8px;
            }
            .stat-item {
                min-width: calc(50% - 4px);
                padding: 12px 8px;
            }
            .stat-num {
                font-size: 20px;
            }
            .team-card-img-wrap {
                aspect-ratio: 16/10;
            }
            .team-card-body {
                padding: 14px 16px;
            }
            .team-card h3 {
                font-size: 16px;
            }
            .hot-sidebar {
                padding: 16px;
            }
            .breadcrumb {
                font-size: 12px;
            }
        }