/* roulang page: index */
:root {
            --primary: #1A5CFF;
            --primary-hover: #1647C9;
            --accent-red: #FF3B30;
            --accent-cyan: #00B8A9;
            --bg: #F5F7FB;
            --surface: #FFFFFF;
            --text: #0F172A;
            --text-secondary: #5B6778;
            --border: #E3E8F0;
            --radius: 16px;
            --radius-sm: 12px;
            --radius-full: 999px;
            --shadow: 0 8px 24px rgba(15, 23, 42, 0.08);
            --shadow-hover: 0 16px 32px rgba(26, 92, 255, 0.12);
            --font-cn: 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, 'Segoe UI', sans-serif;
            --font-num: 'Inter', system-ui, -apple-system, sans-serif;
        }
        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        body {
            font-family: var(--font-cn);
            background: var(--bg);
            color: var(--text);
            line-height: 1.8;
            font-size: 15px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        img {
            max-width: 100%;
            display: block;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: color 0.2s ease;
        }
        button,
        input,
        textarea,
        select {
            font-family: inherit;
            font-size: inherit;
            outline: none;
            border: none;
            background: none;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }
        @media (max-width: 1024px) {
            .container {
                padding: 0 20px;
            }
        }
        @media (max-width: 640px) {
            .container {
                padding: 0 16px;
            }
        }

        /* Header / Nav */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 50;
            background: var(--surface);
            border-bottom: 1px solid var(--border);
            height: 72px;
            display: flex;
            align-items: center;
        }
        .nav-inner {
            display: flex;
            align-items: center;
            gap: 20px;
            width: 100%;
        }
        .nav-logo {
            flex-shrink: 0;
            display: flex;
            align-items: center;
            gap: 8px;
            font-weight: 700;
            font-size: 18px;
            color: var(--text);
            white-space: nowrap;
        }
        .nav-logo .logo-icon {
            width: 32px;
            height: 32px;
            border-radius: 8px;
            background: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 16px;
        }
        .nav-search {
            flex: 1;
            max-width: 520px;
            position: relative;
            display: flex;
            align-items: center;
        }
        .nav-search input {
            width: 100%;
            height: 40px;
            border-radius: var(--radius-full);
            border: 1px solid var(--border);
            background: #F1F4F9;
            padding: 0 40px 0 40px;
            font-size: 14px;
            color: var(--text);
            transition: border 0.2s, box-shadow 0.2s;
        }
        .nav-search input:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(26, 92, 255, 0.15);
            background: #fff;
        }
        .nav-search .search-icon {
            position: absolute;
            left: 14px;
            color: var(--text-secondary);
            font-size: 14px;
            pointer-events: none;
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 16px;
            flex-shrink: 0;
        }
        .nav-links a {
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            padding: 6px 10px;
            border-radius: 8px;
            white-space: nowrap;
            transition: color 0.2s, background 0.2s;
        }
        .nav-links a:hover {
            color: var(--primary);
            background: rgba(26, 92, 255, 0.06);
        }
        .nav-links a.active {
            color: var(--primary);
            background: rgba(26, 92, 255, 0.08);
            font-weight: 600;
        }
        .nav-member {
            flex-shrink: 0;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            font-weight: 600;
            color: #fff;
            background: var(--primary);
            border-radius: var(--radius-full);
            padding: 8px 18px;
            transition: background 0.2s, transform 0.2s;
            white-space: nowrap;
        }
        .nav-member:hover {
            background: var(--primary-hover);
            transform: translateY(-1px);
        }
        .nav-hamburger {
            display: none;
            background: none;
            font-size: 22px;
            color: var(--text);
            cursor: pointer;
            padding: 4px;
        }
        @media (max-width: 1024px) {
            .nav-links {
                display: none;
            }
            .nav-hamburger {
                display: block;
            }
            .nav-search {
                max-width: 300px;
            }
        }
        @media (max-width: 640px) {
            .nav-inner {
                flex-wrap: wrap;
                gap: 8px;
                height: auto;
                padding: 8px 0;
            }
            .site-header {
                height: auto;
                min-height: 72px;
                padding: 8px 0;
            }
            .nav-search {
                max-width: 100%;
                order: 3;
                flex-basis: 100%;
            }
            .nav-member {
                display: none;
            }
        }
        .mobile-menu {
            display: none;
            position: fixed;
            top: 0;
            right: -100%;
            width: 280px;
            height: 100vh;
            background: #fff;
            z-index: 100;
            box-shadow: -8px 0 24px rgba(15, 23, 42, 0.1);
            padding: 24px;
            transition: right 0.3s ease;
            overflow-y: auto;
        }
        .mobile-menu.open {
            right: 0;
        }
        .mobile-menu .close-btn {
            font-size: 24px;
            cursor: pointer;
            color: var(--text);
            margin-bottom: 20px;
            background: none;
        }
        .mobile-menu a {
            display: block;
            padding: 12px 8px;
            font-size: 17px;
            font-weight: 500;
            color: var(--text);
            border-bottom: 1px solid var(--border);
        }
        .mobile-menu a:hover {
            color: var(--primary);
        }
        .mobile-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(15, 23, 42, 0.4);
            z-index: 90;
        }
        .mobile-overlay.open {
            display: block;
        }

        /* Buttons */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-weight: 600;
            font-size: 15px;
            border-radius: var(--radius-full);
            padding: 12px 28px;
            cursor: pointer;
            transition: background 0.2s, transform 0.2s, box-shadow 0.2s;
            white-space: nowrap;
        }
        .btn:active {
            transform: scale(0.98);
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
        }
        .btn-primary:hover {
            background: var(--primary-hover);
            box-shadow: 0 8px 20px rgba(26, 92, 255, 0.3);
        }
        .btn-secondary {
            background: #fff;
            color: var(--text);
            border: 1px solid var(--border);
        }
        .btn-secondary:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: rgba(26, 92, 255, 0.04);
        }
        .btn-reverse {
            background: #fff;
            color: var(--primary);
        }
        .btn-reverse:hover {
            background: #F1F4F9;
            box-shadow: 0 6px 16px rgba(0, 0, 0, 0.15);
        }
        .btn-sm {
            padding: 8px 18px;
            font-size: 14px;
        }
        .btn-xs {
            padding: 6px 14px;
            font-size: 13px;
            border-radius: 999px;
        }

        /* Cards */
        .card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 24px;
            box-shadow: var(--shadow);
            transition: box-shadow 0.2s ease, transform 0.2s ease;
        }
        .card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }

        /* Labels / Badges */
        .badge {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            font-size: 12px;
            font-weight: 600;
            padding: 3px 10px;
            border-radius: 999px;
            white-space: nowrap;
        }
        .badge-red {
            background: rgba(255, 59, 48, 0.1);
            color: var(--accent-red);
        }
        .badge-blue {
            background: rgba(26, 92, 255, 0.1);
            color: var(--primary);
        }
        .badge-cyan {
            background: rgba(0, 184, 169, 0.1);
            color: var(--accent-cyan);
        }
        .badge-gray {
            background: #F1F4F9;
            color: var(--text-secondary);
        }
        .badge-hot {
            background: var(--accent-red);
            color: #fff;
        }

        /* Section */
        section {
            padding: 72px 0;
        }
        @media (max-width: 1024px) {
            section {
                padding: 56px 0;
            }
        }
        @media (max-width: 640px) {
            section {
                padding: 40px 0;
            }
        }
        .section-title {
            font-size: 30px;
            font-weight: 700;
            line-height: 1.3;
            color: var(--text);
            margin-bottom: 12px;
        }
        .section-desc {
            font-size: 15px;
            color: var(--text-secondary);
            max-width: 720px;
            line-height: 1.8;
            margin-bottom: 32px;
        }
        @media (max-width: 640px) {
            .section-title {
                font-size: 24px;
            }
        }

        /* Hero */
        .hero {
            position: relative;
            min-height: 560px;
            display: flex;
            align-items: center;
            background: #0B1220;
            overflow: hidden;
        }
        .hero-bg {
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            opacity: 0.55;
        }
        .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(11, 18, 32, 0.6) 0%, rgba(11, 18, 32, 0.75) 60%, rgba(11, 18, 32, 0.9) 100%);
        }
        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 800px;
            color: #fff;
        }
        .hero h1 {
            font-size: 40px;
            font-weight: 700;
            line-height: 1.2;
            margin-bottom: 18px;
            letter-spacing: -0.5px;
        }
        .hero .hero-sub {
            font-size: 17px;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.85);
            margin-bottom: 28px;
            max-width: 620px;
        }
        .hero-cta-group {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
            margin-bottom: 20px;
        }
        .hero-live-tags {
            display: flex;
            gap: 10px;
            flex-wrap: wrap;
        }
        .hero-live-tags span {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.9);
            background: rgba(255, 255, 255, 0.12);
            border: 1px solid rgba(255, 255, 255, 0.2);
            padding: 6px 14px;
            border-radius: 999px;
            backdrop-filter: blur(6px);
        }
        .countdown-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 59, 48, 0.2);
            border: 1px solid rgba(255, 59, 48, 0.4);
            color: #FFD6D4;
            font-size: 14px;
            font-weight: 600;
            padding: 8px 18px;
            border-radius: 999px;
            margin-bottom: 18px;
        }
        @media (max-width: 640px) {
            .hero h1 {
                font-size: 30px;
            }
            .hero .hero-sub {
                font-size: 15px;
            }
            .hero {
                min-height: 480px;
            }
        }

        /* News list */
        .news-list {
            display: flex;
            flex-direction: column;
            gap: 0;
        }
        .news-item {
            display: flex;
            gap: 20px;
            padding: 18px 12px;
            border-bottom: 1px solid var(--border);
            transition: background 0.2s;
            border-radius: 8px;
        }
        .news-item:hover {
            background: #F8FAFD;
        }
        .news-date {
            flex-shrink: 0;
            width: 64px;
            text-align: center;
            font-size: 13px;
            color: var(--text-secondary);
            background: #F1F4F9;
            border-radius: 8px;
            padding: 10px 6px;
            height: fit-content;
        }
        .news-date .day {
            display: block;
            font-size: 22px;
            font-weight: 700;
            color: var(--primary);
            font-family: var(--font-num);
        }
        .news-body {
            flex: 1;
        }
        .news-title {
            font-size: 17px;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 6px;
            line-height: 1.4;
        }
        .news-summary {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 8px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .news-readmore {
            font-size: 13px;
            font-weight: 600;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }
        .news-readmore:hover {
            color: var(--primary-hover);
        }

        /* Ranking sidebar */
        .rank-list {
            display: flex;
            flex-direction: column;
        }
        .rank-item {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 12px 8px;
            border-bottom: 1px solid var(--border);
            font-size: 14px;
        }
        .rank-item:last-child {
            border-bottom: none;
        }
        .rank-num {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 15px;
            font-family: var(--font-num);
            color: var(--text-secondary);
            background: #F1F4F9;
        }
        .rank-num.top1 {
            background: var(--accent-red);
            color: #fff;
        }
        .rank-num.top2 {
            background: #FF8A65;
            color: #fff;
        }
        .rank-num.top3 {
            background: #FFB74D;
            color: #fff;
        }
        .rank-name {
            flex: 1;
            font-weight: 500;
        }
        .rank-value {
            font-family: var(--font-num);
            font-weight: 600;
            color: var(--primary);
        }

        /* Stat blocks */
        .stat-row {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .stat-block {
            background: rgba(255, 255, 255, 0.92);
            border-radius: var(--radius);
            padding: 24px;
            text-align: center;
            border: 1px solid rgba(26, 92, 255, 0.15);
            backdrop-filter: blur(8px);
        }
        .stat-number {
            font-size: 34px;
            font-weight: 700;
            font-family: var(--font-num);
            color: var(--primary);
            line-height: 1.1;
            margin-bottom: 6px;
        }
        .stat-label {
            font-size: 14px;
            color: var(--text-secondary);
        }
        @media (max-width: 1024px) {
            .stat-row {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 640px) {
            .stat-row {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .stat-number {
                font-size: 26px;
            }
        }

        /* Cover cards */
        .cover-card {
            position: relative;
            border-radius: var(--radius);
            overflow: hidden;
            background: var(--surface);
            border: 1px solid var(--border);
            box-shadow: var(--shadow);
            transition: box-shadow 0.2s, transform 0.2s;
        }
        .cover-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }
        .cover-card img {
            width: 100%;
            height: 200px;
            object-fit: cover;
        }
        .cover-card .card-body {
            padding: 20px;
        }

        /* FAQ */
        .faq-item {
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            margin-bottom: 12px;
            background: #fff;
            overflow: hidden;
            transition: background 0.2s;
        }
        .faq-item[open] {
            background: #F8FAFD;
        }
        .faq-item summary {
            padding: 16px 20px;
            font-weight: 600;
            font-size: 15px;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            list-style: none;
            user-select: none;
        }
        .faq-item summary::-webkit-details-marker {
            display: none;
        }
        .faq-item summary:after {
            content: '+';
            font-size: 22px;
            font-weight: 400;
            color: var(--text-secondary);
            transition: transform 0.2s;
        }
        .faq-item[open] summary:after {
            content: '−';
            color: var(--primary);
        }
        .faq-answer {
            padding: 0 20px 18px;
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.8;
        }

        /* Form */
        .contact-form {
            display: flex;
            flex-direction: column;
            gap: 16px;
            max-width: 640px;
            margin: 0 auto;
        }
        .form-group {
            display: flex;
            flex-direction: column;
            gap: 6px;
        }
        .form-group label {
            font-size: 14px;
            font-weight: 600;
            color: var(--text);
        }
        .form-group input,
        .form-group textarea,
        .form-group select {
            padding: 12px 16px;
            border-radius: var(--radius-sm);
            border: 1px solid var(--border);
            background: #F8FAFD;
            font-size: 14px;
            color: var(--text);
            transition: border 0.2s, box-shadow 0.2s;
            width: 100%;
        }
        .form-group input:focus,
        .form-group textarea:focus,
        .form-group select:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(26, 92, 255, 0.15);
            background: #fff;
        }
        .form-group textarea {
            resize: vertical;
            min-height: 110px;
        }

        /* Footer */
        .site-footer {
            background: #0B1220;
            color: #B0B8C4;
            padding: 40px 0 32px;
            margin-top: 0;
        }
        .footer-brand {
            font-size: 18px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 12px;
        }
        .footer-links {
            display: flex;
            gap: 20px;
            flex-wrap: wrap;
            margin-bottom: 16px;
        }
        .footer-links a {
            font-size: 14px;
            color: #B0B8C4;
        }
        .footer-links a:hover {
            color: #fff;
        }
        .footer-bottom {
            font-size: 13px;
            color: #7A8494;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 16px;
            margin-top: 16px;
            line-height: 1.8;
        }

        /* Progress */
        .progress-item {
            display: flex;
            gap: 16px;
            align-items: flex-start;
            margin-bottom: 16px;
        }
        .progress-check {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: rgba(0, 184, 169, 0.12);
            color: var(--accent-cyan);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 14px;
        }
        .progress-bar-track {
            flex: 1;
            height: 8px;
            background: #E3E8F0;
            border-radius: 999px;
            overflow: hidden;
            margin-top: 8px;
        }
        .progress-bar-fill {
            height: 100%;
            border-radius: 999px;
            background: linear-gradient(90deg, var(--primary), var(--accent-cyan));
            transition: width 0.6s ease;
        }

        /* Guarantee badges */
        .guarantee-row {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
        }
        .guarantee-item {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            background: #fff;
            border-radius: var(--radius-sm);
            padding: 18px;
            border: 1px solid var(--border);
        }
        .guarantee-item i {
            font-size: 22px;
            color: var(--primary);
            margin-top: 2px;
        }
        .guarantee-item .g-title {
            font-weight: 600;
            font-size: 14px;
            color: var(--text);
            margin-bottom: 4px;
        }
        .guarantee-item .g-desc {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.6;
        }
        @media (max-width: 1024px) {
            .guarantee-row {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 640px) {
            .guarantee-row {
                grid-template-columns: 1fr;
            }
        }

        /* Sell points */
        .sell-points {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }
        .sell-point-card {
            background: #fff;
            border-radius: var(--radius);
            padding: 28px 24px;
            border: 1px solid var(--border);
            box-shadow: var(--shadow);
            text-align: center;
        }
        .sell-point-card i {
            font-size: 28px;
            color: var(--primary);
            margin-bottom: 12px;
        }
        .sell-point-title {
            font-size: 17px;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .sell-point-desc {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
        }
        @media (max-width: 1024px) {
            .sell-points {
                grid-template-columns: 1fr;
                gap: 14px;
            }
        }

        /* App section */
        .app-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
        }
        .app-card-img {
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
        }
        .app-card-img img {
            width: 100%;
            height: 300px;
            object-fit: cover;
        }
        @media (max-width: 1024px) {
            .app-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
        }

/* roulang page: category2 */
:root {
            --primary: #1A5CFF;
            --primary-hover: #1647C9;
            --accent-red: #FF3B30;
            --accent-cyan: #00B8A9;
            --bg: #F5F7FB;
            --surface: #FFFFFF;
            --text: #0F172A;
            --text-secondary: #5B6778;
            --border: #E3E8F0;
            --radius: 16px;
            --radius-sm: 12px;
            --radius-full: 999px;
            --shadow: 0 8px 24px rgba(15, 23, 42, 0.08);
            --shadow-hover: 0 16px 32px rgba(26, 92, 255, 0.12);
            --font-cn: 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, 'Segoe UI', sans-serif;
            --font-num: 'Inter', system-ui, -apple-system, sans-serif;
        }

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

        body {
            font-family: var(--font-cn);
            background: var(--bg);
            color: var(--text);
            line-height: 1.8;
            font-size: 15px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

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

        a {
            text-decoration: none;
            color: inherit;
            transition: color 0.2s ease;
        }

        button,
        input,
        textarea,
        select {
            font-family: inherit;
            font-size: inherit;
            outline: none;
            border: none;
            background: none;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* Header / Nav */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 50;
            background: var(--surface);
            border-bottom: 1px solid var(--border);
            height: 72px;
            display: flex;
            align-items: center;
        }

        .nav-inner {
            display: flex;
            align-items: center;
            gap: 20px;
            width: 100%;
        }

        .nav-logo {
            flex-shrink: 0;
            display: flex;
            align-items: center;
            gap: 8px;
            font-weight: 700;
            font-size: 18px;
            color: var(--text);
            white-space: nowrap;
        }

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

        .nav-search {
            flex: 1;
            max-width: 520px;
            position: relative;
            display: flex;
            align-items: center;
        }

        .nav-search input {
            width: 100%;
            height: 40px;
            border-radius: var(--radius-full);
            border: 1px solid var(--border);
            background: #F1F4F9;
            padding: 0 40px 0 40px;
            font-size: 14px;
            color: var(--text);
            transition: border 0.2s, box-shadow 0.2s;
        }

        .nav-search input:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(26, 92, 255, 0.15);
            background: #fff;
        }

        .nav-search .search-icon {
            position: absolute;
            left: 14px;
            color: var(--text-secondary);
            font-size: 14px;
            pointer-events: none;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }

        .nav-links a {
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            padding: 6px 10px;
            border-radius: 8px;
            white-space: nowrap;
            transition: color 0.2s, background 0.2s;
        }

        .nav-links a:hover {
            color: var(--primary);
            background: rgba(26, 92, 255, 0.06);
        }

        .nav-links a.active {
            color: var(--primary);
            background: rgba(26, 92, 255, 0.08);
            font-weight: 600;
        }

        .nav-member {
            flex-shrink: 0;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            font-weight: 600;
            color: #fff;
            background: var(--primary);
            border-radius: var(--radius-full);
            padding: 8px 18px;
            transition: background 0.2s, transform 0.2s;
            white-space: nowrap;
        }

        .nav-member:hover {
            background: var(--primary-hover);
            transform: translateY(-1px);
        }

        .nav-hamburger {
            display: none;
            background: none;
            font-size: 22px;
            color: var(--text);
            cursor: pointer;
            padding: 4px;
        }

        .mobile-menu {
            display: none;
            position: fixed;
            top: 0;
            right: -100%;
            width: 280px;
            height: 100vh;
            background: #fff;
            z-index: 100;
            box-shadow: -8px 0 24px rgba(15, 23, 42, 0.1);
            padding: 24px;
            transition: right 0.3s ease;
            overflow-y: auto;
        }

        .mobile-menu.open {
            right: 0;
        }

        .mobile-menu .close-btn {
            font-size: 24px;
            cursor: pointer;
            color: var(--text);
            margin-bottom: 20px;
            background: none;
        }

        .mobile-menu a {
            display: block;
            padding: 12px 0;
            font-size: 16px;
            font-weight: 500;
            color: var(--text);
            border-bottom: 1px solid var(--border);
        }

        .mobile-menu a.active {
            color: var(--primary);
            font-weight: 600;
        }

        .mobile-menu .mobile-member {
            display: block;
            margin-top: 20px;
            background: var(--primary);
            color: #fff !important;
            text-align: center;
            border-radius: var(--radius-full);
            padding: 10px 0;
            border-bottom: none;
        }

        /* Category Banner */
        .category-banner {
            position: relative;
            padding: 80px 0 60px;
            background-image: url('/assets/images/backpic/back-2.webp');
            background-size: cover;
            background-position: center;
            min-height: 360px;
            display: flex;
            align-items: center;
        }

        .category-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15, 23, 42, 0.82) 0%, rgba(26, 92, 255, 0.55) 60%, rgba(15, 23, 42, 0.35) 100%);
        }

        .category-banner .banner-content {
            position: relative;
            z-index: 2;
            max-width: 720px;
        }

        .category-banner .banner-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--accent-red);
            color: #fff;
            font-size: 12px;
            font-weight: 600;
            padding: 4px 12px;
            border-radius: var(--radius-full);
            margin-bottom: 16px;
        }

        .category-banner h1 {
            font-size: 38px;
            font-weight: 700;
            line-height: 1.25;
            color: #fff;
            margin-bottom: 12px;
        }

        .category-banner .banner-sub {
            font-size: 16px;
            color: rgba(255, 255, 255, 0.85);
            line-height: 1.8;
            max-width: 560px;
        }

        /* Filter Bar */
        .filter-bar {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 20px 24px;
            margin-top: -30px;
            position: relative;
            z-index: 10;
            box-shadow: var(--shadow);
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            align-items: center;
        }

        .filter-group {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
        }

        .filter-group .filter-label {
            font-size: 13px;
            color: var(--text-secondary);
            font-weight: 500;
            white-space: nowrap;
        }

        .filter-btn {
            padding: 6px 14px;
            border-radius: var(--radius-full);
            font-size: 13px;
            font-weight: 500;
            color: var(--text-secondary);
            background: #F1F4F9;
            cursor: pointer;
            transition: all 0.2s ease;
            white-space: nowrap;
        }

        .filter-btn:hover {
            background: rgba(26, 92, 255, 0.08);
            color: var(--primary);
        }

        .filter-btn.active {
            background: var(--primary);
            color: #fff;
        }

        /* Content List */
        .content-list-section {
            padding: 40px 0 60px;
        }

        .list-card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            overflow: hidden;
            margin-bottom: 20px;
            display: flex;
            transition: box-shadow 0.2s ease, transform 0.2s ease;
        }

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

        .list-card .list-image {
            flex: 0 0 220px;
            height: 170px;
            background-size: cover;
            background-position: center;
            position: relative;
        }

        .list-card .list-image .play-badge {
            position: absolute;
            top: 10px;
            left: 10px;
            background: var(--accent-red);
            color: #fff;
            font-size: 11px;
            font-weight: 600;
            padding: 3px 10px;
            border-radius: var(--radius-full);
        }

        .list-card .list-body {
            flex: 1;
            padding: 20px 24px;
            display: flex;
            flex-direction: column;
        }

        .list-card .list-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 13px;
            color: var(--text-secondary);
            margin-bottom: 8px;
        }

        .list-card .list-meta .date-tag {
            background: #F1F4F9;
            padding: 2px 10px;
            border-radius: 6px;
        }

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

        .list-card .list-desc {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            flex: 1;
        }

        .list-card .list-action {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
            margin-top: 8px;
            transition: gap 0.2s;
        }

        .list-card .list-action:hover {
            gap: 8px;
            color: var(--primary-hover);
        }

        /* Category Intro */
        .category-intro {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 28px 32px;
            margin-bottom: 32px;
            box-shadow: var(--shadow);
        }

        .category-intro h2 {
            font-size: 22px;
            font-weight: 700;
            margin-bottom: 12px;
            color: var(--text);
        }

        .category-intro p {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.9;
        }

        /* Pagination */
        .pagination {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            margin-top: 32px;
            flex-wrap: wrap;
        }

        .pagination a {
            width: 40px;
            height: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 10px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            background: var(--surface);
            border: 1px solid var(--border);
            transition: all 0.2s ease;
        }

        .pagination a:hover {
            border-color: var(--primary);
            color: var(--primary);
        }

        .pagination a.active {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }

        .pagination a.page-arrow {
            width: auto;
            padding: 0 16px;
        }

        /* FAQ Section */
        .faq-section {
            padding: 60px 0;
            background: #EDF1F8;
        }

        .faq-section h2 {
            font-size: 28px;
            font-weight: 700;
            margin-bottom: 32px;
            text-align: center;
        }

        .faq-list {
            max-width: 780px;
            margin: 0 auto;
        }

        .faq-item {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            margin-bottom: 12px;
            overflow: hidden;
            transition: box-shadow 0.2s ease;
        }

        .faq-item:hover {
            box-shadow: var(--shadow);
        }

        .faq-item .faq-question {
            padding: 16px 20px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            cursor: pointer;
            font-weight: 600;
            font-size: 15px;
            color: var(--text);
            gap: 12px;
            user-select: none;
        }

        .faq-item .faq-question .faq-icon {
            flex-shrink: 0;
            font-size: 14px;
            color: var(--text-secondary);
            transition: transform 0.3s ease;
        }

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

        .faq-item .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.3s ease;
            padding: 0 20px;
            color: var(--text-secondary);
            font-size: 14px;
            line-height: 1.8;
        }

        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 20px 18px;
        }

        /* CTA Section */
        .cta-section {
            padding: 64px 0;
            background: var(--surface);
            border-top: 1px solid var(--border);
        }

        .cta-box {
            background: linear-gradient(135deg, #0F172A 0%, #1A5CFF 100%);
            border-radius: 20px;
            padding: 48px 40px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 32px;
            flex-wrap: wrap;
        }

        .cta-box .cta-text h2 {
            font-size: 28px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 8px;
        }

        .cta-box .cta-text p {
            font-size: 15px;
            color: rgba(255, 255, 255, 0.8);
            max-width: 480px;
        }

        .cta-box .cta-actions {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: #fff;
            color: var(--primary);
            font-weight: 600;
            padding: 12px 24px;
            border-radius: var(--radius-full);
            font-size: 14px;
            transition: all 0.2s ease;
            white-space: nowrap;
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(255, 255, 255, 0.25);
        }

        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: transparent;
            color: #fff;
            font-weight: 600;
            padding: 12px 24px;
            border-radius: var(--radius-full);
            font-size: 14px;
            border: 2px solid rgba(255, 255, 255, 0.4);
            transition: all 0.2s ease;
            white-space: nowrap;
        }

        .btn-secondary:hover {
            border-color: #fff;
            background: rgba(255, 255, 255, 0.1);
        }

        /* Footer */
        .site-footer {
            background: #0B1220;
            color: #C8CDD8;
            padding: 48px 0 24px;
        }

        .site-footer .footer-brand {
            font-size: 20px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
        }

        .site-footer .footer-links {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            margin-bottom: 24px;
        }

        .site-footer .footer-links a {
            font-size: 14px;
            color: #A8B0BD;
            transition: color 0.2s;
        }

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

        .site-footer .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 20px;
            font-size: 13px;
            color: #7A8494;
            display: flex;
            flex-wrap: wrap;
            gap: 8px 20px;
            align-items: center;
            justify-content: space-between;
        }

        .site-footer .footer-bottom a {
            color: #7A8494;
            transition: color 0.2s;
        }

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

        /* Responsive */
        @media (max-width: 1024px) {
            .nav-links {
                gap: 6px;
            }

            .nav-links a {
                font-size: 13px;
                padding: 4px 8px;
            }

            .nav-search {
                max-width: 300px;
            }
        }

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

            .nav-hamburger {
                display: block;
            }

            .nav-search {
                max-width: 100%;
                flex-basis: 100%;
                order: 3;
            }

            .nav-inner {
                flex-wrap: wrap;
                gap: 8px;
                height: auto;
                padding: 8px 0;
            }

            .site-header {
                height: auto;
                min-height: 72px;
                padding: 8px 0;
            }

            .nav-member {
                display: none;
            }

            .mobile-menu {
                display: block;
            }

            .category-banner {
                padding: 48px 0 40px;
                min-height: 280px;
            }

            .category-banner h1 {
                font-size: 28px;
            }

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

            .list-card .list-image {
                flex: 0 0 auto;
                height: 180px;
                width: 100%;
            }

            .filter-bar {
                padding: 16px;
                margin-top: -20px;
            }

            .cta-box {
                padding: 32px 24px;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }

            .category-banner h1 {
                font-size: 24px;
            }

            .category-banner .banner-sub {
                font-size: 14px;
            }

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

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

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

            .pagination a {
                width: 36px;
                height: 36px;
                font-size: 13px;
            }
        }

/* roulang page: category1 */
:root {
            --primary: #1A5CFF;
            --primary-hover: #1647C9;
            --accent-red: #FF3B30;
            --accent-cyan: #00B8A9;
            --bg: #F5F7FB;
            --surface: #FFFFFF;
            --text: #0F172A;
            --text-secondary: #5B6778;
            --border: #E3E8F0;
            --radius: 16px;
            --radius-sm: 12px;
            --radius-full: 999px;
            --shadow: 0 8px 24px rgba(15, 23, 42, 0.08);
            --shadow-hover: 0 16px 32px rgba(26, 92, 255, 0.12);
            --font-cn: 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, 'Segoe UI', sans-serif;
            --font-num: 'Inter', system-ui, -apple-system, sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-cn);
            background: var(--bg);
            color: var(--text);
            line-height: 1.8;
            font-size: 15px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

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

        a {
            text-decoration: none;
            color: inherit;
            transition: color 0.2s ease;
        }

        button,
        input,
        textarea,
        select {
            font-family: inherit;
            font-size: inherit;
            outline: none;
            border: none;
            background: none;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* Header / Nav */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 50;
            background: var(--surface);
            border-bottom: 1px solid var(--border);
            min-height: 72px;
            display: flex;
            align-items: center;
            padding: 8px 0;
        }

        .nav-inner {
            display: flex;
            align-items: center;
            gap: 16px;
            width: 100%;
            flex-wrap: wrap;
        }

        .nav-logo {
            flex-shrink: 0;
            display: flex;
            align-items: center;
            gap: 8px;
            font-weight: 700;
            font-size: 18px;
            color: var(--text);
            white-space: nowrap;
        }

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

        .nav-search {
            flex: 1;
            max-width: 460px;
            position: relative;
            display: flex;
            align-items: center;
            min-width: 200px;
        }

        .nav-search input {
            width: 100%;
            height: 40px;
            border-radius: var(--radius-full);
            border: 1px solid var(--border);
            background: #F1F4F9;
            padding: 0 40px 0 40px;
            font-size: 14px;
            color: var(--text);
            transition: border 0.2s, box-shadow 0.2s, background 0.2s;
        }

        .nav-search input:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(26, 92, 255, 0.15);
            background: #fff;
        }

        .nav-search .search-icon {
            position: absolute;
            left: 14px;
            color: var(--text-secondary);
            font-size: 14px;
            pointer-events: none;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 4px;
            flex-shrink: 0;
            flex-wrap: wrap;
        }

        .nav-links a {
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            padding: 6px 10px;
            border-radius: 8px;
            white-space: nowrap;
            transition: color 0.2s, background 0.2s;
        }

        .nav-links a:hover {
            color: var(--primary);
            background: rgba(26, 92, 255, 0.06);
        }

        .nav-links a.active {
            color: var(--primary);
            background: rgba(26, 92, 255, 0.08);
            font-weight: 600;
        }

        .nav-member {
            flex-shrink: 0;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            font-weight: 600;
            color: #fff;
            background: var(--primary);
            border-radius: var(--radius-full);
            padding: 8px 18px;
            transition: background 0.2s, transform 0.2s;
            white-space: nowrap;
        }

        .nav-member:hover {
            background: var(--primary-hover);
            transform: translateY(-1px);
        }

        .nav-hamburger {
            display: none;
            background: none;
            font-size: 22px;
            color: var(--text);
            cursor: pointer;
            padding: 4px;
        }

        /* Hero */
        .category-hero {
            position: relative;
            background-image: url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            min-height: 380px;
            display: flex;
            align-items: center;
            overflow: hidden;
        }

        .category-hero .overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(11, 18, 32, 0.85) 0%, rgba(26, 92, 255, 0.55) 60%, rgba(11, 18, 32, 0.4) 100%);
        }

        .category-hero .hero-content {
            position: relative;
            z-index: 2;
            width: 100%;
            padding: 60px 0;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.15);
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
            border: 1px solid rgba(255, 255, 255, 0.25);
            border-radius: var(--radius-full);
            padding: 6px 16px;
            color: #fff;
            font-size: 13px;
            font-weight: 500;
            margin-bottom: 20px;
        }

        .category-hero h1 {
            font-size: 38px;
            font-weight: 700;
            line-height: 1.25;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: -0.5px;
        }

        .category-hero h1 .accent {
            color: var(--accent-red);
        }

        .category-hero .hero-desc {
            font-size: 16px;
            color: rgba(255, 255, 255, 0.85);
            max-width: 560px;
            line-height: 1.8;
            margin-bottom: 28px;
        }

        .hero-actions {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--primary);
            color: #fff;
            border-radius: var(--radius-full);
            padding: 12px 28px;
            font-size: 15px;
            font-weight: 600;
            transition: background 0.2s, transform 0.2s, box-shadow 0.2s;
            cursor: pointer;
            border: none;
        }

        .btn-primary:hover {
            background: var(--primary-hover);
            transform: translateY(-1px);
            box-shadow: var(--shadow-hover);
        }

        .btn-primary:active {
            transform: scale(0.98);
        }

        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.12);
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
            color: #fff;
            border: 1px solid rgba(255, 255, 255, 0.3);
            border-radius: var(--radius-full);
            padding: 12px 28px;
            font-size: 15px;
            font-weight: 600;
            transition: background 0.2s, transform 0.2s, border-color 0.2s;
            cursor: pointer;
        }

        .btn-secondary:hover {
            background: rgba(255, 255, 255, 0.2);
            border-color: rgba(255, 255, 255, 0.5);
            transform: translateY(-1px);
        }

        .btn-secondary:active {
            transform: scale(0.98);
        }

        /* Section shared */
        .section {
            padding: 64px 0;
        }

        .section-title {
            font-size: 28px;
            font-weight: 700;
            line-height: 1.3;
            color: var(--text);
            margin-bottom: 12px;
            letter-spacing: -0.3px;
        }

        .section-subtitle {
            font-size: 15px;
            color: var(--text-secondary);
            max-width: 640px;
            line-height: 1.8;
            margin-bottom: 32px;
        }

        /* Intro paragraph */
        .intro-card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 32px;
            box-shadow: var(--shadow);
            margin-bottom: 32px;
        }

        .intro-card p {
            font-size: 15px;
            line-height: 2.0;
            color: var(--text-secondary);
        }

        /* Filter bar */
        .filter-bar {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 20px 24px;
            box-shadow: var(--shadow);
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
            align-items: center;
            margin-bottom: 32px;
        }

        .filter-group {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .filter-group label {
            font-size: 13px;
            font-weight: 500;
            color: var(--text-secondary);
            white-space: nowrap;
        }

        .filter-group select {
            background: #F1F4F9;
            border: 1px solid var(--border);
            border-radius: 8px;
            padding: 8px 32px 8px 12px;
            font-size: 13px;
            color: var(--text);
            cursor: pointer;
            appearance: none;
            -webkit-appearance: none;
            background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%235B6778' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
            background-repeat: no-repeat;
            background-position: right 12px center;
            transition: border 0.2s, box-shadow 0.2s;
        }

        .filter-group select:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(26, 92, 255, 0.12);
        }

        .filter-divider {
            width: 1px;
            height: 28px;
            background: var(--border);
            flex-shrink: 0;
        }

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

        .content-item {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 20px;
            display: flex;
            gap: 20px;
            box-shadow: 0 2px 8px rgba(15, 23, 42, 0.04);
            transition: box-shadow 0.2s ease, transform 0.2s ease, border-color 0.2s ease;
        }

        .content-item:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
            border-color: rgba(26, 92, 255, 0.25);
        }

        .content-thumb {
            flex-shrink: 0;
            width: 260px;
            aspect-ratio: 16/9;
            border-radius: var(--radius-sm);
            overflow: hidden;
            background: #E8ECF3;
        }

        .content-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.3s ease;
        }

        .content-item:hover .content-thumb img {
            transform: scale(1.03);
        }

        .content-body {
            flex: 1;
            display: flex;
            flex-direction: column;
            gap: 8px;
            min-width: 0;
        }

        .content-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-wrap: wrap;
        }

        .content-date {
            font-size: 13px;
            color: var(--text-secondary);
            font-family: var(--font-num);
        }

        .content-tag {
            font-size: 12px;
            font-weight: 600;
            color: var(--primary);
            background: rgba(26, 92, 255, 0.08);
            padding: 3px 10px;
            border-radius: var(--radius-full);
            white-space: nowrap;
        }

        .content-tag.accent {
            color: var(--accent-red);
            background: rgba(255, 59, 48, 0.08);
        }

        .content-tag.cyan {
            color: var(--accent-cyan);
            background: rgba(0, 184, 169, 0.08);
        }

        .content-title {
            font-size: 18px;
            font-weight: 700;
            line-height: 1.4;
            color: var(--text);
            transition: color 0.2s;
        }

        .content-item:hover .content-title {
            color: var(--primary);
        }

        .content-excerpt {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .content-link {
            font-size: 13px;
            font-weight: 600;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 4px;
            margin-top: auto;
            transition: color 0.2s, gap 0.2s;
            cursor: pointer;
        }

        .content-link:hover {
            color: var(--primary-hover);
            gap: 8px;
        }

        /* Hot topic / deep section */
        .deep-section {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 40px;
            box-shadow: var(--shadow);
            margin-top: 40px;
        }

        .deep-section .deep-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 32px;
            margin-top: 24px;
        }

        .deep-section .deep-text p {
            font-size: 15px;
            line-height: 2.0;
            color: var(--text-secondary);
            margin-bottom: 16px;
        }

        .deep-section .deep-image {
            border-radius: var(--radius-sm);
            overflow: hidden;
            aspect-ratio: 4/3;
        }

        .deep-section .deep-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .deep-score-table {
            background: #F8FAFD;
            border-radius: var(--radius-sm);
            padding: 20px;
            margin-top: 16px;
        }

        .deep-score-table table {
            width: 100%;
            border-collapse: collapse;
            font-size: 13px;
        }

        .deep-score-table th {
            text-align: left;
            color: var(--text-secondary);
            font-weight: 500;
            padding: 8px 12px;
            border-bottom: 1px solid var(--border);
            font-size: 12px;
        }

        .deep-score-table td {
            padding: 8px 12px;
            border-bottom: 1px solid var(--border);
            color: var(--text);
            font-family: var(--font-num);
        }

        .deep-score-table tr:last-child td {
            border-bottom: none;
        }

        /* Pagination */
        .pagination {
            display: flex;
            justify-content: center;
            align-items: center;
            gap: 8px;
            margin-top: 40px;
            flex-wrap: wrap;
        }

        .pagination a,
        .pagination span {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-width: 38px;
            height: 38px;
            padding: 0 12px;
            border-radius: 10px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            border: 1px solid var(--border);
            background: var(--surface);
            transition: all 0.2s;
            cursor: pointer;
        }

        .pagination a:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: rgba(26, 92, 255, 0.04);
        }

        .pagination .current {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
            font-weight: 600;
        }

        /* FAQ */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
            max-width: 820px;
            margin: 0 auto;
        }

        .faq-item {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            overflow: hidden;
            transition: border-color 0.2s, box-shadow 0.2s;
        }

        .faq-item:hover {
            border-color: rgba(26, 92, 255, 0.25);
            box-shadow: var(--shadow);
        }

        .faq-item.open {
            background: #F8FAFD;
            border-color: rgba(26, 92, 255, 0.3);
        }

        .faq-question {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 18px 22px;
            cursor: pointer;
            font-size: 15px;
            font-weight: 600;
            color: var(--text);
            transition: color 0.2s;
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            gap: 16px;
        }

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

        .faq-icon {
            flex-shrink: 0;
            width: 24px;
            height: 24px;
            border-radius: 50%;
            background: rgba(26, 92, 255, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            font-size: 12px;
            transition: transform 0.3s ease;
        }

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

        .faq-answer {
            padding: 0 22px;
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
            color: var(--text-secondary);
            font-size: 14px;
            line-height: 1.8;
        }

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

        /* CTA */
        .cta-section {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 48px 40px;
            box-shadow: var(--shadow);
            text-align: center;
            max-width: 720px;
            margin: 0 auto;
        }

        .cta-section .cta-title {
            font-size: 24px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 12px;
        }

        .cta-section .cta-desc {
            font-size: 14px;
            color: var(--text-secondary);
            margin-bottom: 24px;
            line-height: 1.8;
        }

        .cta-form {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
            justify-content: center;
            max-width: 520px;
            margin: 0 auto;
        }

        .cta-form input {
            flex: 1;
            min-width: 240px;
            height: 44px;
            border-radius: var(--radius-sm);
            border: 1px solid var(--border);
            background: #F8FAFD;
            padding: 0 16px;
            font-size: 14px;
            color: var(--text);
            transition: border 0.2s, box-shadow 0.2s;
        }

        .cta-form input:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(26, 92, 255, 0.15);
            background: #fff;
        }

        /* Footer */
        .site-footer {
            background: #0B1220;
            color: #7A8494;
            padding: 48px 0 24px;
            margin-top: 64px;
        }

        .footer-brand {
            font-size: 20px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
        }

        .footer-links {
            display: flex;
            gap: 20px;
            flex-wrap: wrap;
            margin-bottom: 24px;
        }

        .footer-links a {
            color: #7A8494;
            font-size: 13px;
            transition: color 0.2s;
        }

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

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 20px;
            font-size: 12px;
            line-height: 2.0;
        }

        .footer-bottom a {
            color: #7A8494;
            transition: color 0.2s;
        }

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

        /* Mobile menu */
        .mobile-menu {
            display: none;
            position: fixed;
            top: 0;
            right: -100%;
            width: 280px;
            height: 100vh;
            background: #fff;
            z-index: 100;
            box-shadow: -8px 0 24px rgba(15, 23, 42, 0.1);
            padding: 24px;
            transition: right 0.3s ease;
            overflow-y: auto;
        }

        .mobile-menu.open {
            right: 0;
        }

        .mobile-menu .close-btn {
            font-size: 24px;
            cursor: pointer;
            color: var(--text);
            margin-bottom: 20px;
            background: none;
            border: none;
            display: block;
        }

        .mobile-menu a {
            display: block;
            font-size: 15px;
            color: var(--text);
            padding: 12px 0;
            border-bottom: 1px solid var(--border);
            font-weight: 500;
        }

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

        .mobile-menu .nav-member {
            display: inline-flex;
            margin-top: 16px;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .nav-inner {
                gap: 8px;
            }
            .nav-search {
                max-width: 100%;
                order: 3;
                flex-basis: 100%;
            }
            .nav-links {
                display: none;
            }
            .nav-hamburger {
                display: block;
                margin-left: auto;
            }
            .nav-member {
                display: none;
            }
            .content-thumb {
                width: 200px;
            }
            .deep-section .deep-grid {
                grid-template-columns: 1fr;
            }
            .category-hero h1 {
                font-size: 30px;
            }
            .section {
                padding: 48px 0;
            }
        }

        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }
            .category-hero {
                min-height: 300px;
            }
            .category-hero h1 {
                font-size: 26px;
            }
            .category-hero .hero-desc {
                font-size: 14px;
            }
            .section-title {
                font-size: 22px;
            }
            .content-item {
                flex-direction: column;
                gap: 14px;
                padding: 16px;
            }
            .content-thumb {
                width: 100%;
                aspect-ratio: 16/9;
            }
            .filter-bar {
                flex-direction: column;
                align-items: stretch;
                gap: 12px;
                padding: 16px;
            }
            .filter-divider {
                display: none;
            }
            .deep-section {
                padding: 24px;
            }
            .cta-section {
                padding: 32px 20px;
            }
            .footer-links {
                gap: 14px;
            }
            .hero-actions {
                flex-direction: column;
            }
            .btn-primary,
            .btn-secondary {
                width: 100%;
                justify-content: center;
            }
        }

        @media (max-width: 520px) {
            .category-hero h1 {
                font-size: 22px;
            }
            .category-hero .hero-badge {
                font-size: 11px;
                padding: 4px 12px;
            }
            .pagination a,
            .pagination span {
                min-width: 32px;
                height: 32px;
                font-size: 12px;
                padding: 0 8px;
            }
            .nav-logo {
                font-size: 15px;
            }
            .nav-logo .logo-icon {
                width: 28px;
                height: 28px;
                font-size: 13px;
            }
        }

/* roulang page: category3 */
:root {
            --primary: #1A5CFF;
            --primary-hover: #1647C9;
            --accent-red: #FF3B30;
            --accent-cyan: #00B8A9;
            --bg: #F5F7FB;
            --surface: #FFFFFF;
            --text: #0F172A;
            --text-secondary: #5B6778;
            --border: #E3E8F0;
            --radius: 16px;
            --radius-sm: 12px;
            --radius-full: 999px;
            --shadow: 0 8px 24px rgba(15, 23, 42, 0.08);
            --shadow-hover: 0 16px 32px rgba(26, 92, 255, 0.12);
            --font-cn: 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, 'Segoe UI', sans-serif;
            --font-num: 'Inter', system-ui, -apple-system, sans-serif;
        }

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

        body {
            font-family: var(--font-cn);
            background: var(--bg);
            color: var(--text);
            line-height: 1.8;
            font-size: 15px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

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

        a {
            text-decoration: none;
            color: inherit;
            transition: color 0.2s ease;
        }

        button,
        input,
        textarea,
        select {
            font-family: inherit;
            font-size: inherit;
            outline: none;
            border: none;
            background: none;
        }

        button {
            cursor: pointer;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* Header / Nav */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 50;
            background: var(--surface);
            border-bottom: 1px solid var(--border);
            height: 72px;
            display: flex;
            align-items: center;
        }

        .nav-inner {
            display: flex;
            align-items: center;
            gap: 20px;
            width: 100%;
        }

        .nav-logo {
            flex-shrink: 0;
            display: flex;
            align-items: center;
            gap: 8px;
            font-weight: 700;
            font-size: 18px;
            color: var(--text);
            white-space: nowrap;
        }

        .nav-logo .logo-icon {
            width: 32px;
            height: 32px;
            border-radius: 8px;
            background: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 16px;
            flex-shrink: 0;
        }

        .nav-search {
            flex: 1;
            max-width: 520px;
            position: relative;
            display: flex;
            align-items: center;
        }

        .nav-search input {
            width: 100%;
            height: 40px;
            border-radius: var(--radius-full);
            border: 1px solid var(--border);
            background: #F1F4F9;
            padding: 0 40px 0 40px;
            font-size: 14px;
            color: var(--text);
            transition: border 0.2s, box-shadow 0.2s;
        }

        .nav-search input::placeholder {
            color: #98A2B3;
        }

        .nav-search input:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(26, 92, 255, 0.15);
            background: #fff;
        }

        .nav-search .search-icon {
            position: absolute;
            left: 14px;
            color: var(--text-secondary);
            font-size: 14px;
            pointer-events: none;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 4px;
            flex-shrink: 0;
        }

        .nav-links a {
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            padding: 6px 12px;
            border-radius: 8px;
            white-space: nowrap;
            transition: color 0.2s, background 0.2s;
        }

        .nav-links a:hover {
            color: var(--primary);
            background: rgba(26, 92, 255, 0.06);
        }

        .nav-links a.active {
            color: var(--primary);
            background: rgba(26, 92, 255, 0.08);
            font-weight: 600;
        }

        .nav-member {
            flex-shrink: 0;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            font-weight: 600;
            color: #fff;
            background: var(--primary);
            border-radius: var(--radius-full);
            padding: 8px 18px;
            transition: background 0.2s, transform 0.2s;
            white-space: nowrap;
        }

        .nav-member:hover {
            background: var(--primary-hover);
            transform: translateY(-1px);
        }

        .nav-hamburger {
            display: none;
            background: none;
            font-size: 22px;
            color: var(--text);
            cursor: pointer;
            padding: 4px;
        }

        /* Mobile Menu */
        .mobile-menu {
            display: none;
            position: fixed;
            top: 0;
            right: -100%;
            width: 280px;
            height: 100vh;
            background: #fff;
            z-index: 100;
            box-shadow: -8px 0 24px rgba(15, 23, 42, 0.12);
            padding: 24px;
            transition: right 0.3s ease;
            overflow-y: auto;
        }

        .mobile-menu.open {
            right: 0;
        }

        .mobile-menu .close-btn {
            font-size: 26px;
            cursor: pointer;
            color: var(--text);
            margin-bottom: 24px;
            background: none;
            width: 40px;
            height: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 8px;
            transition: background 0.2s;
        }

        .mobile-menu .close-btn:hover {
            background: #F1F4F9;
        }

        .mobile-menu a {
            display: block;
            padding: 14px 16px;
            border-radius: 10px;
            font-size: 16px;
            font-weight: 500;
            color: var(--text);
            transition: background 0.2s, color 0.2s;
            margin-bottom: 4px;
        }

        .mobile-menu a:hover {
            background: rgba(26, 92, 255, 0.06);
            color: var(--primary);
        }

        .mobile-menu a.active {
            background: rgba(26, 92, 255, 0.08);
            color: var(--primary);
            font-weight: 600;
        }

        .mobile-overlay {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100vw;
            height: 100vh;
            background: rgba(15, 23, 42, 0.45);
            z-index: 90;
            transition: opacity 0.3s;
        }

        .mobile-overlay.show {
            display: block;
        }

        /* Section base */
        .section {
            padding: 72px 0;
        }

        .section-sm {
            padding: 48px 0;
        }

        .section-title {
            font-size: 28px;
            font-weight: 700;
            line-height: 1.3;
            color: var(--text);
            margin-bottom: 12px;
        }

        .section-subtitle {
            font-size: 15px;
            color: var(--text-secondary);
            margin-bottom: 40px;
            max-width: 680px;
        }

        /* Hero */
        .hero-banner {
            position: relative;
            background-image: url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            min-height: 440px;
            display: flex;
            align-items: center;
            padding: 64px 0;
        }

        .hero-banner::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: linear-gradient(90deg, rgba(11, 18, 32, 0.82) 0%, rgba(11, 18, 32, 0.55) 50%, rgba(11, 18, 32, 0.35) 100%);
            z-index: 1;
        }

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

        .hero-banner .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(255, 59, 48, 0.9);
            color: #fff;
            font-size: 13px;
            font-weight: 600;
            padding: 4px 14px;
            border-radius: var(--radius-full);
            margin-bottom: 16px;
        }

        .hero-banner h1 {
            font-size: 38px;
            font-weight: 700;
            line-height: 1.25;
            color: #fff;
            margin-bottom: 14px;
        }

        .hero-banner .hero-desc {
            font-size: 16px;
            color: rgba(255, 255, 255, 0.85);
            max-width: 560px;
            margin-bottom: 28px;
            line-height: 1.8;
        }

        .hero-sell-list {
            display: flex;
            flex-wrap: wrap;
            gap: 18px;
            margin-bottom: 28px;
        }

        .hero-sell-list li {
            display: flex;
            align-items: center;
            gap: 7px;
            color: rgba(255, 255, 255, 0.9);
            font-size: 14px;
            font-weight: 500;
        }

        .hero-sell-list li .check-icon {
            width: 18px;
            height: 18px;
            border-radius: 50%;
            background: var(--accent-cyan);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 10px;
            color: #fff;
            flex-shrink: 0;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            margin-bottom: 24px;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 15px;
            font-weight: 600;
            padding: 12px 28px;
            border-radius: var(--radius-full);
            transition: all 0.2s ease;
            cursor: pointer;
            border: none;
            white-space: nowrap;
        }

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

        .btn-primary:hover {
            background: var(--primary-hover);
            transform: translateY(-1px);
            box-shadow: 0 8px 20px rgba(26, 92, 255, 0.3);
        }

        .btn-primary:active {
            transform: scale(0.98);
        }

        .btn-outline-light {
            background: transparent;
            color: #fff;
            border: 1.5px solid rgba(255, 255, 255, 0.55);
        }

        .btn-outline-light:hover {
            border-color: #fff;
            background: rgba(255, 255, 255, 0.1);
            transform: translateY(-1px);
        }

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

        .btn-accent:hover {
            background: #d92d24;
            transform: translateY(-1px);
            box-shadow: 0 8px 20px rgba(255, 59, 48, 0.3);
        }

        .hero-trust-bar {
            display: flex;
            flex-wrap: wrap;
            gap: 24px;
            color: rgba(255, 255, 255, 0.6);
            font-size: 13px;
        }

        .hero-trust-bar span {
            display: flex;
            align-items: center;
            gap: 5px;
        }

        /* Filter bar */
        .filter-bar {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            align-items: center;
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 16px 20px;
            box-shadow: var(--shadow);
            margin-bottom: 32px;
        }

        .filter-bar select {
            background: #F1F4F9;
            border: 1px solid var(--border);
            border-radius: 8px;
            padding: 8px 14px;
            font-size: 13px;
            color: var(--text);
            cursor: pointer;
            transition: border 0.2s;
        }

        .filter-bar select:focus {
            border-color: var(--primary);
        }

        .filter-bar label {
            font-size: 13px;
            font-weight: 600;
            color: var(--text-secondary);
        }

        /* Category intro */
        .cat-intro-card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 28px 32px;
            box-shadow: var(--shadow);
            margin-bottom: 32px;
        }

        .cat-intro-card p {
            font-size: 15px;
            color: var(--text);
            line-height: 2;
            margin-bottom: 12px;
        }

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

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

        .content-item {
            display: flex;
            gap: 20px;
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 20px;
            box-shadow: var(--shadow);
            transition: all 0.2s ease;
            cursor: pointer;
        }

        .content-item:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
            border-color: rgba(26, 92, 255, 0.2);
        }

        .content-item .item-thumb {
            width: 200px;
            min-width: 200px;
            height: 130px;
            border-radius: var(--radius-sm);
            overflow: hidden;
            flex-shrink: 0;
        }

        .content-item .item-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.3s ease;
        }

        .content-item:hover .item-thumb img {
            transform: scale(1.04);
        }

        .content-item .item-body {
            flex: 1;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
            min-width: 0;
        }

        .content-item .item-tag {
            display: inline-block;
            font-size: 12px;
            font-weight: 600;
            color: var(--primary);
            background: rgba(26, 92, 255, 0.08);
            padding: 2px 10px;
            border-radius: 6px;
            margin-bottom: 8px;
            align-self: flex-start;
        }

        .content-item .item-title {
            font-size: 17px;
            font-weight: 600;
            color: var(--text);
            line-height: 1.4;
            margin-bottom: 8px;
        }

        .content-item .item-title a {
            transition: color 0.2s;
        }

        .content-item:hover .item-title a {
            color: var(--primary);
        }

        .content-item .item-desc {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.7;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 10px;
        }

        .content-item .item-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            font-size: 12px;
            color: #98A2B3;
        }

        .content-item .read-more {
            font-size: 13px;
            font-weight: 600;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 4px;
            transition: gap 0.2s;
        }

        .content-item .read-more:hover {
            gap: 8px;
        }

        /* Pagination */
        .pagination {
            display: flex;
            justify-content: center;
            gap: 8px;
            margin-top: 32px;
        }

        .pagination a,
        .pagination span {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-width: 40px;
            height: 40px;
            border-radius: 8px;
            font-size: 14px;
            font-weight: 500;
            border: 1px solid var(--border);
            color: var(--text-secondary);
            background: var(--surface);
            transition: all 0.2s;
        }

        .pagination a:hover {
            border-color: var(--primary);
            color: var(--primary);
        }

        .pagination .current {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
            font-weight: 600;
        }

        /* FAQ */
        .faq-wrapper {
            max-width: 780px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .faq-item {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            overflow: hidden;
            transition: border 0.2s, box-shadow 0.2s;
        }

        .faq-item.active {
            border-color: rgba(26, 92, 255, 0.3);
            box-shadow: var(--shadow);
        }

        .faq-item .faq-question {
            padding: 18px 22px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
            cursor: pointer;
            background: none;
            width: 100%;
            text-align: left;
            font-size: 15px;
            font-weight: 600;
            color: var(--text);
            transition: background 0.2s;
        }

        .faq-item .faq-question:hover {
            background: #F8FAFD;
        }

        .faq-item .faq-icon {
            flex-shrink: 0;
            width: 24px;
            height: 24px;
            border-radius: 50%;
            background: #F1F4F9;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 12px;
            color: var(--text-secondary);
            transition: transform 0.3s, background 0.3s, color 0.3s;
        }

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

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease;
        }

        .faq-answer-inner {
            padding: 0 22px 20px;
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.9;
        }

        .faq-item.active .faq-answer {
            max-height: 400px;
        }

        /* CTA */
        .cta-section {
            background: linear-gradient(135deg, #0B1220 0%, #1A2D50 100%);
            border-radius: var(--radius);
            padding: 56px 40px;
            text-align: center;
            color: #fff;
        }

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

        .cta-section p {
            font-size: 15px;
            color: rgba(255, 255, 255, 0.75);
            margin-bottom: 28px;
            max-width: 480px;
            margin-left: auto;
            margin-right: auto;
        }

        .cta-actions {
            display: flex;
            justify-content: center;
            gap: 12px;
            flex-wrap: wrap;
        }

        /* Footer */
        .site-footer {
            background: #0B1220;
            color: #7A8494;
            padding: 48px 0 32px;
            margin-top: auto;
        }

        .footer-brand {
            font-size: 18px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 20px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .footer-links {
            display: flex;
            flex-wrap: wrap;
            gap: 12px 20px;
            margin-bottom: 28px;
        }

        .footer-links a {
            font-size: 14px;
            color: #7A8494;
            transition: color 0.2s;
        }

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

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 24px;
            font-size: 13px;
            color: #7A8494;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .footer-bottom p {
            margin: 0;
        }

        .footer-bottom a {
            color: #7A8494;
            transition: color 0.2s;
        }

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

        /* Responsive */
        @media (max-width: 1024px) {
            .nav-links {
                gap: 2px;
            }
            .nav-links a {
                padding: 6px 8px;
                font-size: 13px;
            }
            .nav-search {
                max-width: 300px;
            }
            .section {
                padding: 56px 0;
            }
            .hero-banner h1 {
                font-size: 32px;
            }
            .content-item .item-thumb {
                width: 160px;
                min-width: 160px;
                height: 110px;
            }
        }

        @media (max-width: 768px) {
            .nav-links {
                display: none;
            }
            .nav-hamburger {
                display: block;
            }
            .mobile-menu {
                display: block;
            }
            .nav-search {
                max-width: 100%;
                order: 3;
                flex-basis: 100%;
            }
            .nav-inner {
                flex-wrap: wrap;
                gap: 8px;
                height: auto;
                padding: 8px 0;
            }
            .site-header {
                height: auto;
                min-height: 72px;
                padding: 8px 0;
            }
            .nav-member {
                display: none;
            }
            .container {
                padding: 0 16px;
            }
            .hero-banner {
                min-height: 380px;
                padding: 48px 0;
            }
            .hero-banner h1 {
                font-size: 26px;
            }
            .hero-banner .hero-desc {
                font-size: 14px;
            }
            .section {
                padding: 40px 0;
            }
            .section-title {
                font-size: 22px;
            }
            .content-item {
                flex-direction: column;
                gap: 12px;
                padding: 16px;
            }
            .content-item .item-thumb {
                width: 100%;
                min-width: auto;
                height: 180px;
            }
            .content-item .item-desc {
                -webkit-line-clamp: 3;
            }
            .filter-bar {
                flex-direction: column;
                align-items: flex-start;
                gap: 8px;
            }
            .cta-section {
                padding: 36px 20px;
            }
            .cta-section h2 {
                font-size: 22px;
            }
            .cat-intro-card {
                padding: 20px;
            }
        }

        @media (max-width: 520px) {
            .hero-banner h1 {
                font-size: 22px;
            }
            .hero-sell-list {
                flex-direction: column;
                gap: 8px;
            }
            .hero-actions {
                flex-direction: column;
                width: 100%;
            }
            .hero-actions .btn {
                width: 100%;
                justify-content: center;
            }
            .pagination a,
            .pagination span {
                min-width: 34px;
                height: 34px;
                font-size: 12px;
            }
            .content-item .item-thumb {
                height: 150px;
            }
            .footer-links {
                gap: 8px 14px;
            }
        }

/* roulang page: category4 */
:root {
            --primary: #1A5CFF;
            --primary-hover: #1647C9;
            --accent-red: #FF3B30;
            --accent-cyan: #00B8A9;
            --bg: #F5F7FB;
            --surface: #FFFFFF;
            --text: #0F172A;
            --text-secondary: #5B6778;
            --border: #E3E8F0;
            --radius: 16px;
            --radius-sm: 12px;
            --radius-full: 999px;
            --shadow: 0 8px 24px rgba(15, 23, 42, 0.08);
            --shadow-hover: 0 16px 32px rgba(26, 92, 255, 0.12);
            --font-cn: 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, 'Segoe UI', sans-serif;
            --font-num: 'Inter', system-ui, -apple-system, sans-serif;
        }

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

        body {
            font-family: var(--font-cn);
            background: var(--bg);
            color: var(--text);
            line-height: 1.8;
            font-size: 15px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

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

        a {
            text-decoration: none;
            color: inherit;
            transition: color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
        }

        button,
        input,
        textarea,
        select {
            font-family: inherit;
            font-size: inherit;
            outline: none;
            border: none;
            background: none;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* Header / Nav */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 50;
            background: var(--surface);
            border-bottom: 1px solid var(--border);
            height: 72px;
            display: flex;
            align-items: center;
        }

        .nav-inner {
            display: flex;
            align-items: center;
            gap: 20px;
            width: 100%;
        }

        .nav-logo {
            flex-shrink: 0;
            display: flex;
            align-items: center;
            gap: 8px;
            font-weight: 700;
            font-size: 18px;
            color: var(--text);
            white-space: nowrap;
        }

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

        .nav-search {
            flex: 1;
            max-width: 520px;
            position: relative;
            display: flex;
            align-items: center;
        }

        .nav-search input {
            width: 100%;
            height: 40px;
            border-radius: var(--radius-full);
            border: 1px solid var(--border);
            background: #F1F4F9;
            padding: 0 40px 0 40px;
            font-size: 14px;
            color: var(--text);
            transition: border 0.2s, box-shadow 0.2s;
        }

        .nav-search input:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(26, 92, 255, 0.15);
            background: #fff;
        }

        .nav-search .search-icon {
            position: absolute;
            left: 14px;
            color: var(--text-secondary);
            font-size: 14px;
            pointer-events: none;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 6px;
            flex-shrink: 0;
        }

        .nav-links a {
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            padding: 6px 12px;
            border-radius: 8px;
            white-space: nowrap;
            transition: color 0.2s, background 0.2s;
        }

        .nav-links a:hover {
            color: var(--primary);
            background: rgba(26, 92, 255, 0.06);
        }

        .nav-links a.active {
            color: var(--primary);
            background: rgba(26, 92, 255, 0.08);
            font-weight: 600;
        }

        .nav-member {
            flex-shrink: 0;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            font-weight: 600;
            color: #fff;
            background: var(--primary);
            border-radius: var(--radius-full);
            padding: 8px 18px;
            transition: background 0.2s, transform 0.2s;
            white-space: nowrap;
        }

        .nav-member:hover {
            background: var(--primary-hover);
            transform: translateY(-1px);
        }

        .nav-hamburger {
            display: none;
            background: none;
            font-size: 22px;
            color: var(--text);
            cursor: pointer;
            padding: 4px;
        }

        /* Mobile Menu */
        .mobile-menu {
            display: none;
            position: fixed;
            top: 0;
            right: -100%;
            width: 280px;
            height: 100vh;
            background: #fff;
            z-index: 100;
            box-shadow: -8px 0 24px rgba(15, 23, 42, 0.1);
            padding: 24px;
            transition: right 0.3s ease;
            overflow-y: auto;
        }

        .mobile-menu.open {
            right: 0;
        }

        .mobile-menu .close-btn {
            font-size: 24px;
            cursor: pointer;
            color: var(--text);
            margin-bottom: 20px;
            background: none;
            display: block;
        }

        .mobile-menu a {
            display: block;
            padding: 12px 10px;
            font-size: 16px;
            color: var(--text);
            border-radius: 8px;
            margin-bottom: 4px;
            transition: background 0.2s;
        }

        .mobile-menu a:hover {
            background: #F1F4F9;
        }

        .mobile-menu a.active {
            color: var(--primary);
            background: rgba(26, 92, 255, 0.08);
            font-weight: 600;
        }

        /* Hero */
        .cat-hero {
            position: relative;
            background-image: url('/assets/images/backpic/back-2.webp');
            background-size: cover;
            background-position: center;
            min-height: 460px;
            display: flex;
            align-items: center;
            color: #fff;
        }

        .cat-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(11, 18, 32, 0.82) 0%, rgba(26, 92, 255, 0.55) 55%, rgba(11, 18, 32, 0.7) 100%);
        }

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

        .cat-hero h1 {
            font-size: 38px;
            font-weight: 700;
            line-height: 1.2;
            margin-bottom: 16px;
        }

        .cat-hero p {
            font-size: 17px;
            opacity: 0.9;
            max-width: 560px;
            margin-bottom: 24px;
        }

        .cat-hero .hero-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-bottom: 28px;
        }

        .cat-hero .hero-tags span {
            background: rgba(255, 255, 255, 0.15);
            backdrop-filter: blur(6px);
            border: 1px solid rgba(255, 255, 255, 0.25);
            padding: 6px 14px;
            border-radius: var(--radius-full);
            font-size: 13px;
            font-weight: 500;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--primary);
            color: #fff;
            font-weight: 600;
            font-size: 15px;
            padding: 12px 28px;
            border-radius: var(--radius-full);
            transition: background 0.2s, transform 0.2s, box-shadow 0.2s;
            cursor: pointer;
        }

        .btn-primary:hover {
            background: var(--primary-hover);
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(26, 92, 255, 0.3);
        }

        .btn-primary:active {
            transform: scale(0.98);
        }

        .btn-outline-light {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: transparent;
            color: #fff;
            font-weight: 600;
            font-size: 15px;
            padding: 12px 28px;
            border-radius: var(--radius-full);
            border: 2px solid rgba(255, 255, 255, 0.6);
            transition: background 0.2s, border 0.2s, transform 0.2s;
            cursor: pointer;
        }

        .btn-outline-light:hover {
            background: rgba(255, 255, 255, 0.12);
            border-color: #fff;
            transform: translateY(-2px);
        }

        /* Section */
        .section {
            padding: 72px 0;
        }

        .section-label {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            color: var(--primary);
            text-transform: uppercase;
            letter-spacing: 0.05em;
            margin-bottom: 10px;
        }

        .section-title {
            font-size: 30px;
            font-weight: 700;
            line-height: 1.3;
            color: var(--text);
            margin-bottom: 14px;
        }

        .section-desc {
            font-size: 16px;
            color: var(--text-secondary);
            max-width: 680px;
            margin-bottom: 32px;
            line-height: 1.9;
        }

        /* Category Intro */
        .cat-intro {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 28px 32px;
            box-shadow: var(--shadow);
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.9;
            margin-bottom: 40px;
        }

        .cat-intro strong {
            color: var(--text);
            font-weight: 600;
        }

        /* Filter Bar */
        .filter-bar {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 16px;
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 16px 20px;
            margin-bottom: 28px;
            box-shadow: var(--shadow);
        }

        .filter-group {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .filter-group label {
            font-size: 14px;
            font-weight: 600;
            color: var(--text);
            white-space: nowrap;
        }

        .filter-group select,
        .filter-group input {
            background: #F1F4F9;
            border: 1px solid var(--border);
            border-radius: 8px;
            padding: 7px 12px;
            font-size: 13px;
            color: var(--text);
            transition: border 0.2s, box-shadow 0.2s;
            cursor: pointer;
        }

        .filter-group select:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(26, 92, 255, 0.12);
        }

        .filter-tag {
            font-size: 12px;
            font-weight: 600;
            padding: 4px 12px;
            border-radius: var(--radius-full);
            background: rgba(26, 92, 255, 0.08);
            color: var(--primary);
            cursor: pointer;
            transition: background 0.2s;
        }

        .filter-tag:hover,
        .filter-tag.active {
            background: var(--primary);
            color: #fff;
        }

        /* List Cards */
        .list-card {
            display: flex;
            gap: 20px;
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 18px;
            margin-bottom: 16px;
            box-shadow: var(--shadow);
            transition: box-shadow 0.2s ease, transform 0.2s ease, border-color 0.2s ease;
        }

        .list-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
            border-color: rgba(26, 92, 255, 0.25);
        }

        .list-card .card-img {
            width: 220px;
            min-width: 220px;
            height: 130px;
            border-radius: 12px;
            overflow: hidden;
            position: relative;
        }

        .list-card .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.3s ease;
        }

        .list-card:hover .card-img img {
            transform: scale(1.05);
        }

        .list-card .card-body {
            flex: 1;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
            gap: 8px;
        }

        .list-card .card-top {
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .list-card .card-tag {
            font-size: 12px;
            font-weight: 600;
            padding: 3px 10px;
            border-radius: var(--radius-full);
            background: rgba(255, 59, 48, 0.08);
            color: var(--accent-red);
            white-space: nowrap;
        }

        .list-card .card-tag.blue {
            background: rgba(26, 92, 255, 0.08);
            color: var(--primary);
        }

        .list-card .card-tag.cyan {
            background: rgba(0, 184, 169, 0.08);
            color: var(--accent-cyan);
        }

        .list-card .card-date {
            font-size: 13px;
            color: var(--text-secondary);
        }

        .list-card .card-title {
            font-size: 17px;
            font-weight: 600;
            color: var(--text);
            line-height: 1.4;
            transition: color 0.2s;
        }

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

        .list-card .card-desc {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .list-card .read-more {
            font-size: 13px;
            font-weight: 600;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 4px;
            transition: gap 0.2s;
        }

        .list-card .read-more:hover {
            gap: 8px;
        }

        /* Pagination */
        .pagination {
            display: flex;
            justify-content: center;
            align-items: center;
            gap: 8px;
            margin-top: 32px;
            flex-wrap: wrap;
        }

        .pagination a,
        .pagination span {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-width: 40px;
            height: 40px;
            padding: 0 14px;
            border-radius: 10px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            background: var(--surface);
            border: 1px solid var(--border);
            transition: all 0.2s;
            cursor: pointer;
        }

        .pagination a:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: rgba(26, 92, 255, 0.04);
        }

        .pagination .current {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
            font-weight: 600;
        }

        /* Deep Content */
        .deep-content {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 36px;
            box-shadow: var(--shadow);
        }

        .deep-content h2 {
            font-size: 26px;
            font-weight: 700;
            line-height: 1.3;
            margin-bottom: 18px;
            color: var(--text);
        }

        .deep-content p {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 2;
            margin-bottom: 16px;
        }

        .deep-content .deep-img {
            border-radius: 12px;
            overflow: hidden;
            margin: 20px 0;
        }

        .deep-content .deep-img img {
            width: 100%;
            height: 300px;
            object-fit: cover;
        }

        /* Stats */
        .stats-row {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            margin: 32px 0;
        }

        .stat-block {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 24px;
            text-align: center;
            box-shadow: var(--shadow);
            transition: transform 0.2s, box-shadow 0.2s;
        }

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

        .stat-block .stat-number {
            font-size: 38px;
            font-weight: 700;
            color: var(--primary);
            font-family: var(--font-num);
            line-height: 1.2;
        }

        .stat-block .stat-label {
            font-size: 14px;
            color: var(--text-secondary);
            margin-top: 6px;
        }

        /* FAQ */
        .faq-item {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            margin-bottom: 12px;
            overflow: hidden;
            transition: box-shadow 0.2s;
        }

        .faq-item:hover {
            box-shadow: var(--shadow);
        }

        .faq-question {
            padding: 18px 22px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            font-size: 15px;
            font-weight: 600;
            color: var(--text);
            transition: background 0.2s;
            user-select: none;
        }

        .faq-question:hover {
            background: #F8FAFD;
        }

        .faq-question .faq-icon {
            color: var(--text-secondary);
            font-size: 14px;
            transition: transform 0.2s;
            flex-shrink: 0;
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease;
        }

        .faq-answer-inner {
            padding: 0 22px 20px;
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.8;
        }

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

        .faq-item.open {
            border-color: rgba(26, 92, 255, 0.25);
        }

        /* CTA */
        .cta-section {
            background: linear-gradient(135deg, #0B1220 0%, #1A3A7A 50%, #1A5CFF 100%);
            border-radius: var(--radius);
            padding: 48px 40px;
            color: #fff;
            text-align: center;
        }

        .cta-section h2 {
            font-size: 28px;
            font-weight: 700;
            margin-bottom: 14px;
        }

        .cta-section p {
            font-size: 16px;
            opacity: 0.85;
            max-width: 560px;
            margin: 0 auto 28px;
            line-height: 1.8;
        }

        .cta-form {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            justify-content: center;
            max-width: 560px;
            margin: 0 auto;
        }

        .cta-form input {
            flex: 1;
            min-width: 200px;
            padding: 13px 18px;
            border-radius: var(--radius-full);
            background: rgba(255, 255, 255, 0.12);
            border: 1px solid rgba(255, 255, 255, 0.25);
            color: #fff;
            font-size: 14px;
            transition: border 0.2s, background 0.2s;
        }

        .cta-form input::placeholder {
            color: rgba(255, 255, 255, 0.6);
        }

        .cta-form input:focus {
            border-color: #fff;
            background: rgba(255, 255, 255, 0.2);
        }

        /* Footer */
        .site-footer {
            background: #0B1220;
            color: #7A8494;
            padding: 48px 0 28px;
            margin-top: 72px;
        }

        .footer-brand {
            font-size: 20px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 18px;
        }

        .footer-links {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            margin-bottom: 24px;
        }

        .footer-links a {
            font-size: 14px;
            color: #7A8494;
            transition: color 0.2s;
        }

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

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 20px;
            font-size: 13px;
            color: #5B6778;
        }

        .footer-bottom p {
            margin-bottom: 6px;
        }

        .footer-bottom a {
            color: #7A8494;
            transition: color 0.2s;
        }

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

        /* Responsive */
        @media (max-width: 1024px) {
            .nav-links a {
                padding: 6px 8px;
                font-size: 13px;
            }
            .nav-search {
                max-width: 300px;
            }
            .stats-row {
                grid-template-columns: repeat(2, 1fr);
            }
            .list-card .card-img {
                width: 180px;
                min-width: 180px;
                height: 110px;
            }
        }

        @media (max-width: 768px) {
            .nav-links {
                display: none;
            }
            .nav-hamburger {
                display: block;
            }
            .nav-search {
                max-width: 100%;
                order: 3;
                flex-basis: 100%;
            }
            .nav-inner {
                flex-wrap: wrap;
                gap: 8px;
                padding: 8px 0;
            }
            .site-header {
                height: auto;
                min-height: 72px;
                padding: 8px 0;
            }
            .nav-member {
                display: none;
            }
            .mobile-menu {
                display: block;
            }

            .cat-hero {
                min-height: 380px;
            }
            .cat-hero h1 {
                font-size: 28px;
            }
            .cat-hero p {
                font-size: 15px;
            }
            .section {
                padding: 48px 0;
            }
            .section-title {
                font-size: 24px;
            }
            .deep-content {
                padding: 24px;
            }
            .list-card {
                flex-direction: column;
                gap: 14px;
            }
            .list-card .card-img {
                width: 100%;
                min-width: unset;
                height: 180px;
            }
            .filter-bar {
                flex-direction: column;
                align-items: flex-start;
                gap: 12px;
            }
            .filter-group {
                flex-wrap: wrap;
            }
            .stats-row {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .stat-block .stat-number {
                font-size: 28px;
            }
            .cta-section {
                padding: 32px 20px;
            }
            .cta-section h2 {
                font-size: 22px;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .cat-hero h1 {
                font-size: 24px;
            }
            .cat-hero .hero-tags span {
                font-size: 12px;
                padding: 4px 10px;
            }
            .btn-primary,
            .btn-outline-light {
                padding: 10px 20px;
                font-size: 14px;
            }
            .stats-row {
                grid-template-columns: 1fr;
            }
            .footer-links {
                gap: 10px;
            }
            .pagination a,
            .pagination span {
                min-width: 34px;
                height: 34px;
                padding: 0 10px;
                font-size: 13px;
            }
        }

/* roulang page: category5 */
:root {
            --primary: #1A5CFF;
            --primary-hover: #1647C9;
            --accent-red: #FF3B30;
            --accent-cyan: #00B8A9;
            --bg: #F5F7FB;
            --surface: #FFFFFF;
            --text: #0F172A;
            --text-secondary: #5B6778;
            --border: #E3E8F0;
            --radius: 16px;
            --radius-sm: 12px;
            --radius-full: 999px;
            --shadow: 0 8px 24px rgba(15, 23, 42, 0.08);
            --shadow-hover: 0 16px 32px rgba(26, 92, 255, 0.12);
            --font-cn: 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, 'Segoe UI', sans-serif;
            --font-num: 'Inter', system-ui, -apple-system, sans-serif;
        }

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

        body {
            font-family: var(--font-cn);
            background: var(--bg);
            color: var(--text);
            line-height: 1.8;
            font-size: 15px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

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

        a {
            text-decoration: none;
            color: inherit;
            transition: color 0.2s ease;
        }

        button,
        input,
        textarea,
        select {
            font-family: inherit;
            font-size: inherit;
            outline: none;
            border: none;
            background: none;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        .site-header {
            position: sticky;
            top: 0;
            z-index: 60;
            background: var(--surface);
            border-bottom: 1px solid var(--border);
            height: 72px;
            display: flex;
            align-items: center;
        }

        .nav-inner {
            display: flex;
            align-items: center;
            gap: 20px;
            width: 100%;
        }

        .nav-logo {
            flex-shrink: 0;
            display: flex;
            align-items: center;
            gap: 8px;
            font-weight: 700;
            font-size: 18px;
            color: var(--text);
            white-space: nowrap;
        }

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

        .nav-search {
            flex: 1;
            max-width: 520px;
            position: relative;
            display: flex;
            align-items: center;
        }

        .nav-search input {
            width: 100%;
            height: 40px;
            border-radius: var(--radius-full);
            border: 1px solid var(--border);
            background: #F1F4F9;
            padding: 0 40px 0 40px;
            font-size: 14px;
            color: var(--text);
            transition: border 0.2s, box-shadow 0.2s;
        }

        .nav-search input:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(26, 92, 255, 0.15);
            background: #fff;
        }

        .nav-search .search-icon {
            position: absolute;
            left: 14px;
            color: var(--text-secondary);
            font-size: 14px;
            pointer-events: none;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }

        .nav-links a {
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            padding: 6px 10px;
            border-radius: 8px;
            white-space: nowrap;
            transition: color 0.2s, background 0.2s;
        }

        .nav-links a:hover {
            color: var(--primary);
            background: rgba(26, 92, 255, 0.06);
        }

        .nav-links a.active {
            color: var(--primary);
            background: rgba(26, 92, 255, 0.08);
            font-weight: 600;
        }

        .nav-member {
            flex-shrink: 0;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            font-weight: 600;
            color: #fff;
            background: var(--primary);
            border-radius: var(--radius-full);
            padding: 8px 18px;
            transition: background 0.2s, transform 0.2s;
            white-space: nowrap;
        }

        .nav-member:hover {
            background: var(--primary-hover);
            transform: translateY(-1px);
        }

        .nav-hamburger {
            display: none;
            background: none;
            font-size: 22px;
            color: var(--text);
            cursor: pointer;
            padding: 4px;
            flex-shrink: 0;
        }

        .mobile-menu {
            display: none;
            position: fixed;
            top: 0;
            right: -100%;
            width: 280px;
            height: 100vh;
            background: #fff;
            z-index: 100;
            box-shadow: -8px 0 24px rgba(15, 23, 42, 0.1);
            padding: 24px;
            transition: right 0.3s ease;
            overflow-y: auto;
        }

        .mobile-menu.open {
            right: 0;
        }

        .mobile-menu .close-btn {
            font-size: 24px;
            cursor: pointer;
            color: var(--text);
            margin-bottom: 20px;
            background: none;
            display: block;
            margin-left: auto;
        }

        .mobile-menu a {
            display: block;
            font-size: 16px;
            font-weight: 500;
            color: var(--text);
            padding: 12px 8px;
            border-bottom: 1px solid var(--border);
            transition: color 0.2s, background 0.2s;
        }

        .mobile-menu a:hover,
        .mobile-menu a.active {
            color: var(--primary);
            background: rgba(26, 92, 255, 0.06);
        }

        .mobile-menu .nav-member-mobile {
            margin-top: 16px;
            display: block;
            text-align: center;
            background: var(--primary);
            color: #fff;
            border-radius: var(--radius-full);
            padding: 12px;
            font-weight: 600;
            border-bottom: none;
        }

        .section {
            padding: 64px 0;
        }
        .section-sm {
            padding: 40px 0;
        }
        .section-light {
            background: #fff;
        }
        .section-blue-tint {
            background: #EAF0FF;
        }

        .badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 12px;
            font-weight: 600;
            padding: 4px 12px;
            border-radius: var(--radius-full);
            line-height: 1.6;
        }
        .badge-red {
            background: rgba(255, 59, 48, 0.1);
            color: var(--accent-red);
        }
        .badge-primary {
            background: rgba(26, 92, 255, 0.1);
            color: var(--primary);
        }
        .badge-cyan {
            background: rgba(0, 184, 169, 0.1);
            color: var(--accent-cyan);
        }
        .badge-gray {
            background: rgba(91, 103, 120, 0.12);
            color: var(--text-secondary);
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-weight: 600;
            font-size: 15px;
            padding: 12px 28px;
            border-radius: var(--radius-full);
            cursor: pointer;
            transition: background 0.2s, transform 0.2s, box-shadow 0.2s, border 0.2s;
            border: 1px solid transparent;
            white-space: nowrap;
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
        }
        .btn-primary:hover {
            background: var(--primary-hover);
            box-shadow: 0 8px 20px rgba(26, 92, 255, 0.25);
            transform: translateY(-1px);
        }
        .btn-outline {
            background: transparent;
            color: var(--primary);
            border-color: var(--primary);
        }
        .btn-outline:hover {
            background: rgba(26, 92, 255, 0.06);
            transform: translateY(-1px);
        }
        .btn-light {
            background: #fff;
            color: var(--text);
            border-color: var(--border);
        }
        .btn-light:hover {
            background: #F8FAFD;
            border-color: #CBD5E1;
            transform: translateY(-1px);
        }
        .btn-sm {
            padding: 8px 18px;
            font-size: 13px;
        }
        .btn:active {
            transform: scale(0.98);
        }

        .card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 24px;
            box-shadow: var(--shadow);
            transition: box-shadow 0.2s ease, transform 0.2s ease;
        }
        .card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }

        .filter-bar {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 12px;
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 16px 20px;
            margin-bottom: 28px;
        }
        .filter-bar label {
            font-size: 13px;
            color: var(--text-secondary);
            font-weight: 500;
            white-space: nowrap;
            margin-right: 4px;
        }
        .filter-bar select {
            background: #F1F4F9;
            border: 1px solid var(--border);
            border-radius: 8px;
            padding: 8px 12px;
            font-size: 13px;
            color: var(--text);
            cursor: pointer;
            min-width: 110px;
            transition: border 0.2s, box-shadow 0.2s;
        }
        .filter-bar select:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(26, 92, 255, 0.15);
        }

        .list-card {
            display: flex;
            gap: 20px;
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 20px;
            box-shadow: var(--shadow);
            transition: box-shadow 0.2s ease, transform 0.2s ease;
            margin-bottom: 16px;
        }
        .list-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }
        .list-card .list-thumb {
            width: 220px;
            min-height: 140px;
            border-radius: var(--radius-sm);
            overflow: hidden;
            flex-shrink: 0;
            aspect-ratio: 16/9;
            background: #E3E8F0 center/cover no-repeat;
        }
        .list-card .list-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .list-card .list-body {
            flex: 1;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
            gap: 8px;
        }
        .list-card .list-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-wrap: wrap;
            font-size: 13px;
            color: var(--text-secondary);
        }
        .list-card .list-title {
            font-size: 18px;
            font-weight: 600;
            color: var(--text);
            line-height: 1.45;
        }
        .list-card .list-title a:hover {
            color: var(--primary);
        }
        .list-card .list-excerpt {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .read-more-link {
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 4px;
            transition: gap 0.2s;
        }
        .read-more-link:hover {
            gap: 8px;
            color: var(--primary-hover);
        }

        .pagination-bar {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            margin-top: 32px;
            flex-wrap: wrap;
        }
        .pagination-bar a {
            min-width: 40px;
            height: 40px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            border-radius: 10px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            background: var(--surface);
            border: 1px solid var(--border);
            transition: background 0.2s, border 0.2s, color 0.2s;
            padding: 0 12px;
        }
        .pagination-bar a:hover {
            border-color: var(--primary);
            color: var(--primary);
        }
        .pagination-bar a.active-page {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }
        .pagination-bar .page-dots {
            color: var(--text-secondary);
            font-size: 16px;
            padding: 0 4px;
        }

        .faq-item {
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            margin-bottom: 12px;
            background: var(--surface);
            overflow: hidden;
            transition: border 0.2s;
        }
        .faq-item.active {
            border-color: var(--primary);
        }
        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 18px 20px;
            font-size: 16px;
            font-weight: 600;
            color: var(--text);
            cursor: pointer;
            text-align: left;
            transition: color 0.2s;
        }
        .faq-question:hover {
            color: var(--primary);
        }
        .faq-question .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: rgba(26, 92, 255, 0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            color: var(--primary);
            transition: transform 0.3s;
        }
        .faq-item.active .faq-icon {
            transform: rotate(180deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease, padding 0.3s ease;
            padding: 0 20px;
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.8;
        }
        .faq-item.active .faq-answer {
            max-height: 420px;
            padding: 0 20px 20px;
        }
        .faq-item.default-open .faq-answer {
            max-height: 420px;
            padding: 0 20px 20px;
        }
        .faq-item.default-open .faq-icon {
            transform: rotate(180deg);
        }
        .faq-item.default-open {
            border-color: var(--primary);
        }

        .site-footer {
            background: #0B1220;
            color: #B8C0CC;
            padding: 48px 0 32px;
        }
        .site-footer .footer-brand {
            font-size: 18px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
        }
        .site-footer .footer-links {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
            margin-bottom: 24px;
        }
        .site-footer .footer-links a {
            font-size: 14px;
            color: #B8C0CC;
            transition: color 0.2s;
        }
        .site-footer .footer-links a:hover {
            color: #fff;
        }
        .site-footer .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 20px;
            font-size: 13px;
            color: #7A8494;
            display: flex;
            flex-wrap: wrap;
            gap: 8px 16px;
            justify-content: space-between;
            align-items: center;
        }
        .site-footer .footer-bottom a {
            color: #7A8494;
            transition: color 0.2s;
        }
        .site-footer .footer-bottom a:hover {
            color: #fff;
        }

        .hero-inner {
            position: relative;
            border-radius: var(--radius);
            overflow: hidden;
            background: #0B1220;
            min-height: 320px;
            display: flex;
            align-items: center;
        }
        .hero-bg {
            position: absolute;
            inset: 0;
            width: 100%;
            height: 100%;
            object-fit: cover;
            opacity: 0.55;
        }
        .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(11, 18, 32, 0.85) 0%, rgba(26, 92, 255, 0.45) 60%, rgba(11, 18, 32, 0.3) 100%);
        }
        .hero-content {
            position: relative;
            z-index: 2;
            padding: 48px 40px;
            max-width: 680px;
        }

        .data-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 16px;
        }
        .data-block {
            background: rgba(255, 255, 255, 0.9);
            border-radius: var(--radius-sm);
            padding: 20px;
            text-align: center;
            border: 1px solid rgba(26, 92, 255, 0.15);
        }
        .data-block .data-num {
            font-family: var(--font-num);
            font-size: 32px;
            font-weight: 700;
            color: var(--primary);
            line-height: 1.2;
        }
        .data-block .data-label {
            font-size: 13px;
            color: var(--text-secondary);
            margin-top: 4px;
        }

        .team-table {
            width: 100%;
            border-collapse: collapse;
            font-size: 14px;
            background: var(--surface);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
        }
        .team-table th {
            background: #F1F4F9;
            font-weight: 600;
            color: var(--text);
            padding: 14px 16px;
            text-align: left;
            font-size: 13px;
        }
        .team-table td {
            padding: 14px 16px;
            border-top: 1px solid var(--border);
            color: var(--text-secondary);
        }
        .team-table td:first-child {
            font-weight: 600;
            color: var(--text);
        }
        .team-table tr:hover td {
            background: #F8FAFD;
        }

        .category-desc {
            background: var(--surface);
            border-left: 4px solid var(--primary);
            padding: 24px 28px;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            box-shadow: var(--shadow);
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.9;
            margin: 0 0 32px;
        }
        .category-desc strong {
            color: var(--text);
            font-weight: 600;
        }

        @media (max-width: 1024px) {
            .nav-links {
                display: none;
            }
            .nav-hamburger {
                display: block;
            }
            .nav-search {
                max-width: 300px;
            }
            .list-card .list-thumb {
                width: 170px;
                min-height: 110px;
            }
            .hero-content {
                padding: 36px 28px;
            }
        }

        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }
            .site-header {
                height: auto;
                min-height: 64px;
                padding: 8px 0;
            }
            .nav-inner {
                flex-wrap: wrap;
                gap: 8px;
                padding: 0;
            }
            .nav-search {
                max-width: 100%;
                order: 3;
                flex-basis: 100%;
            }
            .nav-member {
                display: none;
            }
            .nav-logo {
                font-size: 16px;
            }
            .hero-inner {
                min-height: 260px;
            }
            .hero-content {
                padding: 28px 20px;
            }
            .list-card {
                flex-direction: column;
                gap: 12px;
                padding: 16px;
            }
            .list-card .list-thumb {
                width: 100%;
                min-height: 160px;
                aspect-ratio: 16/9;
            }
            .list-card .list-title {
                font-size: 16px;
            }
            .filter-bar {
                padding: 12px 16px;
                gap: 8px;
            }
            .filter-bar select {
                min-width: 90px;
                padding: 6px 10px;
                font-size: 12px;
            }
            .section {
                padding: 40px 0;
            }
            .site-footer .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                gap: 8px;
            }
            .data-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 14px;
            }
            .hero-content {
                padding: 24px 16px;
            }
            .hero-inner {
                min-height: 230px;
            }
            .pagination-bar a {
                min-width: 34px;
                height: 34px;
                font-size: 12px;
                padding: 0 8px;
            }
        }

/* roulang page: category6 */
:root {
            --primary: #1A5CFF;
            --primary-hover: #1647C9;
            --accent-red: #FF3B30;
            --accent-cyan: #00B8A9;
            --bg: #F5F7FB;
            --surface: #FFFFFF;
            --text: #0F172A;
            --text-secondary: #5B6778;
            --border: #E3E8F0;
            --radius: 16px;
            --radius-sm: 12px;
            --radius-full: 999px;
            --shadow: 0 8px 24px rgba(15, 23, 42, 0.08);
            --shadow-hover: 0 16px 32px rgba(26, 92, 255, 0.12);
            --font-cn: 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, 'Segoe UI', sans-serif;
            --font-num: 'Inter', system-ui, -apple-system, sans-serif;
        }

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

        body {
            font-family: var(--font-cn);
            background: var(--bg);
            color: var(--text);
            line-height: 1.8;
            font-size: 15px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

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

        a {
            text-decoration: none;
            color: inherit;
            transition: color 0.2s ease;
        }

        button,
        input,
        textarea,
        select {
            font-family: inherit;
            font-size: inherit;
            outline: none;
            border: none;
            background: none;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        @media (max-width: 1024px) {
            .container {
                padding: 0 20px;
            }
        }
        @media (max-width: 640px) {
            .container {
                padding: 0 16px;
            }
        }

        /* Header / Nav */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 50;
            background: var(--surface);
            border-bottom: 1px solid var(--border);
            height: 72px;
            display: flex;
            align-items: center;
        }

        .nav-inner {
            display: flex;
            align-items: center;
            gap: 20px;
            width: 100%;
        }

        .nav-logo {
            flex-shrink: 0;
            display: flex;
            align-items: center;
            gap: 8px;
            font-weight: 700;
            font-size: 18px;
            color: var(--text);
            white-space: nowrap;
        }

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

        .nav-search {
            flex: 1;
            max-width: 520px;
            position: relative;
            display: flex;
            align-items: center;
        }

        .nav-search input {
            width: 100%;
            height: 40px;
            border-radius: var(--radius-full);
            border: 1px solid var(--border);
            background: #F1F4F9;
            padding: 0 40px 0 40px;
            font-size: 14px;
            color: var(--text);
            transition: border 0.2s, box-shadow 0.2s;
        }

        .nav-search input:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(26, 92, 255, 0.15);
            background: #fff;
        }

        .nav-search .search-icon {
            position: absolute;
            left: 14px;
            color: var(--text-secondary);
            font-size: 14px;
            pointer-events: none;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-shrink: 0;
        }

        .nav-links a {
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            padding: 6px 12px;
            border-radius: 8px;
            white-space: nowrap;
            transition: color 0.2s, background 0.2s;
        }

        .nav-links a:hover {
            color: var(--primary);
            background: rgba(26, 92, 255, 0.06);
        }

        .nav-links a.active {
            color: var(--primary);
            background: rgba(26, 92, 255, 0.08);
            font-weight: 600;
        }

        .nav-member {
            flex-shrink: 0;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            font-weight: 600;
            color: #fff;
            background: var(--primary);
            border-radius: var(--radius-full);
            padding: 8px 18px;
            transition: background 0.2s, transform 0.2s;
            white-space: nowrap;
        }

        .nav-member:hover {
            background: var(--primary-hover);
            transform: translateY(-1px);
        }

        .nav-hamburger {
            display: none;
            background: none;
            font-size: 22px;
            color: var(--text);
            cursor: pointer;
            padding: 4px;
        }

        @media (max-width: 1024px) {
            .nav-links {
                display: none;
            }
            .nav-hamburger {
                display: block;
            }
            .nav-search {
                max-width: 300px;
            }
        }

        @media (max-width: 640px) {
            .nav-inner {
                flex-wrap: wrap;
                gap: 8px;
                height: auto;
                padding: 8px 0;
            }
            .site-header {
                height: auto;
                min-height: 72px;
                padding: 8px 0;
            }
            .nav-search {
                max-width: 100%;
                order: 3;
                flex-basis: 100%;
            }
            .nav-member {
                display: none;
            }
        }

        .mobile-menu {
            display: none;
            position: fixed;
            top: 0;
            right: -100%;
            width: 280px;
            height: 100vh;
            background: #fff;
            z-index: 100;
            box-shadow: -8px 0 24px rgba(15, 23, 42, 0.1);
            padding: 24px;
            transition: right 0.3s ease;
            overflow-y: auto;
        }

        .mobile-menu.open {
            right: 0;
        }

        .mobile-menu .close-btn {
            font-size: 24px;
            cursor: pointer;
            color: var(--text);
            margin-bottom: 20px;
            background: none;
            display: block;
            margin-left: auto;
        }

        .mobile-menu a {
            display: block;
            padding: 12px 8px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text);
            border-radius: 8px;
        }

        .mobile-menu a:hover {
            background: rgba(26, 92, 255, 0.06);
            color: var(--primary);
        }

        .mobile-menu a.active {
            color: var(--primary);
            background: rgba(26, 92, 255, 0.08);
            font-weight: 600;
        }

        .mobile-overlay {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(15, 23, 42, 0.4);
            z-index: 90;
        }

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

        .mobile-menu {
            display: block;
        }

        /* Hero Banner */
        .cat-hero {
            position: relative;
            min-height: 420px;
            display: flex;
            align-items: center;
            background-image: url('/assets/images/backpic/back-2.webp');
            background-size: cover;
            background-position: center;
            overflow: hidden;
        }

        .cat-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(160deg, rgba(15, 23, 42, 0.82) 0%, rgba(26, 92, 255, 0.45) 55%, rgba(15, 23, 42, 0.6) 100%);
        }

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

        .cat-hero .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.7);
            margin-bottom: 16px;
        }

        .cat-hero .breadcrumb a {
            color: rgba(255, 255, 255, 0.7);
            transition: color 0.2s;
        }

        .cat-hero .breadcrumb a:hover {
            color: #fff;
        }

        .cat-hero h1 {
            font-size: 38px;
            font-weight: 700;
            line-height: 1.25;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: 0.5px;
        }

        .cat-hero .hero-sub {
            font-size: 16px;
            color: rgba(255, 255, 255, 0.82);
            max-width: 640px;
            line-height: 1.7;
        }

        .cat-hero .hero-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-top: 20px;
        }

        .cat-hero .hero-tag {
            display: inline-block;
            font-size: 13px;
            font-weight: 500;
            color: #fff;
            background: rgba(255, 255, 255, 0.18);
            border: 1px solid rgba(255, 255, 255, 0.3);
            border-radius: var(--radius-full);
            padding: 6px 14px;
            transition: background 0.2s;
            cursor: pointer;
        }

        .cat-hero .hero-tag:hover {
            background: rgba(255, 255, 255, 0.28);
        }

        @media (max-width: 640px) {
            .cat-hero {
                min-height: 320px;
            }
            .cat-hero h1 {
                font-size: 26px;
            }
            .cat-hero .hero-sub {
                font-size: 14px;
            }
        }

        /* Filter bar */
        .filter-bar {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 16px 20px;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 14px;
            margin-top: -28px;
            position: relative;
            z-index: 5;
            box-shadow: var(--shadow);
        }

        .filter-group {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .filter-group label {
            font-size: 13px;
            color: var(--text-secondary);
            white-space: nowrap;
        }

        .filter-group select {
            font-size: 13px;
            color: var(--text);
            background: #F1F4F9;
            border: 1px solid var(--border);
            border-radius: 8px;
            padding: 6px 12px;
            cursor: pointer;
            transition: border 0.2s;
        }

        .filter-group select:focus {
            border-color: var(--primary);
        }

        .filter-reset {
            font-size: 13px;
            color: var(--text-secondary);
            cursor: pointer;
            transition: color 0.2s;
            padding: 4px 8px;
            border-radius: 6px;
        }

        .filter-reset:hover {
            color: var(--primary);
            background: rgba(26, 92, 255, 0.06);
        }

        @media (max-width: 640px) {
            .filter-bar {
                flex-direction: column;
                align-items: flex-start;
                gap: 10px;
            }
            .filter-group {
                width: 100%;
            }
            .filter-group select {
                flex: 1;
            }
        }

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

        .article-item {
            display: flex;
            gap: 20px;
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            overflow: hidden;
            padding: 20px;
            transition: transform 0.2s ease, box-shadow 0.2s ease;
        }

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

        .article-item .thumb {
            flex-shrink: 0;
            width: 220px;
            height: 145px;
            border-radius: var(--radius-sm);
            overflow: hidden;
            object-fit: cover;
        }

        .article-item .thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: var(--radius-sm);
        }

        .article-item .info {
            flex: 1;
            display: flex;
            flex-direction: column;
            gap: 8px;
            min-width: 0;
        }

        .article-item .meta {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 13px;
            color: var(--text-secondary);
        }

        .article-item .meta .badge {
            display: inline-block;
            font-size: 12px;
            font-weight: 600;
            color: #fff;
            background: var(--primary);
            border-radius: 4px;
            padding: 2px 8px;
        }

        .article-item .meta .badge.red {
            background: var(--accent-red);
        }

        .article-item .meta .badge.cyan {
            background: var(--accent-cyan);
        }

        .article-item h3 {
            font-size: 17px;
            font-weight: 600;
            line-height: 1.4;
            color: var(--text);
        }

        .article-item .excerpt {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.65;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .article-item .read-more {
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 4px;
            transition: color 0.2s;
            cursor: pointer;
        }

        .article-item .read-more:hover {
            color: var(--primary-hover);
        }

        @media (max-width: 640px) {
            .article-item {
                flex-direction: column;
                padding: 16px;
                gap: 14px;
            }
            .article-item .thumb {
                width: 100%;
                height: 180px;
            }
        }

        /* Section */
        .section {
            padding: 64px 0;
        }

        .section-title {
            font-size: 26px;
            font-weight: 700;
            color: var(--text);
            line-height: 1.3;
            margin-bottom: 8px;
        }

        .section-sub {
            font-size: 15px;
            color: var(--text-secondary);
            margin-bottom: 28px;
        }

        /* Overview paragraph */
        .overview-block {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 28px 32px;
            box-shadow: var(--shadow);
        }

        .overview-block p {
            font-size: 15px;
            color: var(--text);
            line-height: 2;
            margin-bottom: 12px;
        }

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

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

        .stat-card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 24px;
            text-align: center;
            transition: transform 0.2s, box-shadow 0.2s;
        }

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

        .stat-card .num {
            font-family: var(--font-num);
            font-size: 32px;
            font-weight: 700;
            color: var(--primary);
            line-height: 1.2;
        }

        .stat-card .num.accent-red {
            color: var(--accent-red);
        }
        .stat-card .num.accent-cyan {
            color: var(--accent-cyan);
        }

        .stat-card .label {
            font-size: 13px;
            color: var(--text-secondary);
            margin-top: 6px;
        }

        @media (max-width: 768px) {
            .stats-row {
                grid-template-columns: repeat(2, 1fr);
                gap: 14px;
            }
        }
        @media (max-width: 520px) {
            .stats-row {
                grid-template-columns: 1fr;
            }
        }

        /* Pagination */
        .pagination {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 6px;
            margin-top: 32px;
        }

        .pagination a,
        .pagination span {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-width: 38px;
            height: 38px;
            padding: 0 10px;
            border-radius: 8px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            border: 1px solid var(--border);
            background: var(--surface);
            transition: all 0.2s;
            cursor: pointer;
        }

        .pagination a:hover {
            color: var(--primary);
            border-color: var(--primary);
            background: rgba(26, 92, 255, 0.04);
        }

        .pagination .current {
            color: #fff;
            background: var(--primary);
            border-color: var(--primary);
            font-weight: 600;
        }

        /* FAQ */
        .faq-item {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            margin-bottom: 12px;
            overflow: hidden;
            transition: box-shadow 0.2s;
        }

        .faq-item:hover {
            box-shadow: var(--shadow);
        }

        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 16px 20px;
            font-size: 15px;
            font-weight: 600;
            color: var(--text);
            cursor: pointer;
            transition: color 0.2s;
            text-align: left;
        }

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

        .faq-question .faq-icon {
            flex-shrink: 0;
            width: 22px;
            height: 22px;
            border-radius: 50%;
            background: #F1F4F9;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 12px;
            color: var(--text-secondary);
            transition: all 0.25s ease;
        }

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

        .faq-answer {
            padding: 0 20px 16px;
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.8;
            display: none;
        }

        .faq-item.open .faq-answer {
            display: block;
        }
        .faq-item.open {
            background: #F8FAFD;
        }

        /* CTA */
        .cta-block {
            background: linear-gradient(135deg, var(--primary) 0%, #3B82F6 100%);
            border-radius: var(--radius);
            padding: 48px 32px;
            text-align: center;
            color: #fff;
        }

        .cta-block h2 {
            font-size: 26px;
            font-weight: 700;
            line-height: 1.3;
            margin-bottom: 12px;
        }

        .cta-block p {
            font-size: 15px;
            color: rgba(255, 255, 255, 0.85);
            max-width: 520px;
            margin: 0 auto 24px;
            line-height: 1.7;
        }

        .cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 15px;
            font-weight: 600;
            color: var(--primary);
            background: #fff;
            border-radius: var(--radius-full);
            padding: 12px 28px;
            transition: transform 0.2s, box-shadow 0.2s;
            cursor: pointer;
        }

        .cta-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 12px 24px rgba(0, 0, 0, 0.18);
        }

        .cta-btn.secondary {
            background: transparent;
            color: #fff;
            border: 1px solid rgba(255, 255, 255, 0.5);
        }

        .cta-btn.secondary:hover {
            background: rgba(255, 255, 255, 0.1);
        }

        /* Footer */
        .site-footer {
            background: #0B1220;
            color: #7A8494;
            padding: 48px 0 32px;
            margin-top: 0;
        }

        .site-footer .container {
            display: flex;
            flex-direction: column;
            gap: 24px;
        }

        .footer-brand {
            font-size: 18px;
            font-weight: 700;
            color: #fff;
        }

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

        .footer-links a {
            font-size: 14px;
            color: #7A8494;
            transition: color 0.2s;
        }

        .footer-links a:hover {
            color: #fff;
        }
        .footer-links a.active {
            color: #fff;
            font-weight: 600;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 20px;
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            justify-content: space-between;
            align-items: center;
            font-size: 13px;
        }

        .footer-bottom a {
            color: #7A8494;
            transition: color 0.2s;
        }
        .footer-bottom a:hover {
            color: #fff;
        }

        @media (max-width: 640px) {
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                gap: 8px;
            }
        }

        .section {
            padding: 48px 0;
        }
        @media (max-width: 640px) {
            .section {
                padding: 36px 0;
            }
        }