/* roulang page: index */
:root {
            --primary-blue: #2B5C8F;
            --primary-blue-light: #3A6EA5;
            --primary-blue-dark: #1E4A73;
            --accent-gold: #C89B5A;
            --accent-gold-dark: #B98A44;
            --nav-bg: #142A3F;
            --nav-text: #E6EDF4;
            --body-bg: #F5F8FB;
            --section-bg-light: #FFFFFF;
            --section-bg-alt: #EEF3F8;
            --text-primary: #1B2A3A;
            --text-secondary: #4A5A6A;
            --text-muted: #7A8A9A;
            --border-color: rgba(43,92,143,0.12);
            --card-shadow: 0 2px 12px rgba(27,58,87,0.08);
            --card-shadow-hover: 0 8px 24px rgba(27,58,87,0.14);
            --radius-card: 14px;
            --radius-btn: 9px;
            --radius-badge: 999px;
            --transition-default: all 0.25s ease;
            --font-family: 'PingFang SC','Microsoft YaHei','Noto Sans SC',system-ui,-apple-system,'Segoe UI',Roboto,sans-serif;
            --container-max: 1200px;
            --section-padding: 64px 0;
            --card-padding: 20px;
        }

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

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

        body {
            font-family: var(--font-family);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-primary);
            background-color: var(--body-bg);
            margin: 0;
            padding: 0;
            overflow-x: hidden;
        }

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

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

        a:hover,
        a:focus {
            color: var(--accent-gold-dark);
            text-decoration: none;
            outline: none;
        }

        a:focus-visible {
            outline: 3px solid var(--primary-blue-light);
            outline-offset: 2px;
        }

        button,
        input,
        select,
        textarea {
            font-family: var(--font-family);
            font-size: 16px;
            line-height: 1.5;
        }

        button:focus-visible,
        input:focus-visible {
            outline: 3px solid var(--primary-blue-light);
            outline-offset: 2px;
        }

        h1, h2, h3, h4, h5, h6 {
            font-weight: 700;
            line-height: 1.3;
            color: var(--text-primary);
            margin-top: 0;
        }

        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding-left: 20px;
            padding-right: 20px;
        }

        /* 通用按钮 */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 26px;
            border-radius: var(--radius-btn);
            font-size: 15px;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition-default);
            border: 2px solid transparent;
            line-height: 1.4;
            text-align: center;
            white-space: nowrap;
        }

        .btn-primary {
            background-color: var(--accent-gold);
            color: #1B2A3A;
            border-color: var(--accent-gold);
        }

        .btn-primary:hover,
        .btn-primary:focus {
            background-color: var(--accent-gold-dark);
            border-color: var(--accent-gold-dark);
            color: #0F1A24;
            transform: translateY(-2px);
            box-shadow: 0 6px 16px rgba(185,138,68,0.3);
        }

        .btn-secondary {
            background-color: transparent;
            color: var(--primary-blue);
            border-color: var(--primary-blue);
        }

        .btn-secondary:hover,
        .btn-secondary:focus {
            background-color: var(--primary-blue);
            color: #FFFFFF;
            border-color: var(--primary-blue);
            transform: translateY(-2px);
            box-shadow: 0 6px 16px rgba(43,92,143,0.25);
        }

        .btn-outline-light {
            background-color: transparent;
            color: #FFFFFF;
            border-color: rgba(255,255,255,0.6);
        }

        .btn-outline-light:hover,
        .btn-outline-light:focus {
            background-color: rgba(255,255,255,0.15);
            border-color: #FFFFFF;
            color: #FFFFFF;
            transform: translateY(-2px);
        }

        /* 徽章 */
        .badge {
            display: inline-block;
            padding: 4px 12px;
            border-radius: var(--radius-badge);
            font-size: 12px;
            font-weight: 600;
            line-height: 1.6;
            letter-spacing: 0.3px;
        }

        .badge-blue {
            background-color: #E8F0F6;
            color: var(--primary-blue);
        }

        .badge-gold {
            background-color: #F8EFDF;
            color: var(--accent-gold-dark);
        }

        .badge-dark {
            background-color: var(--nav-bg);
            color: var(--nav-text);
        }

        /* 导航 */
        .site-header {
            background-color: var(--nav-bg);
            min-height: 68px;
            display: flex;
            align-items: center;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 2px 10px rgba(0,0,0,0.12);
        }

        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
        }

        .site-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 700;
            color: var(--nav-text);
            letter-spacing: 0.5px;
        }

        .site-logo i {
            color: var(--accent-gold);
            font-size: 24px;
        }

        .site-logo:hover,
        .site-logo:focus {
            color: #FFFFFF;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 32px;
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .nav-links li a {
            color: var(--nav-text);
            font-size: 15px;
            font-weight: 500;
            position: relative;
            padding: 6px 0;
            letter-spacing: 0.3px;
            transition: var(--transition-default);
        }

        .nav-links li a::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background-color: var(--accent-gold);
            transition: width 0.3s ease;
        }

        .nav-links li a:hover::after,
        .nav-links li a:focus::after {
            width: 100%;
        }

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

        .nav-links li a.active::after {
            width: 100%;
        }

        .nav-cta {
            display: flex;
            align-items: center;
            gap: 16px;
        }

        .nav-cta .btn {
            padding: 10px 22px;
            font-size: 14px;
        }

        .hamburger {
            display: none;
            background: none;
            border: none;
            color: var(--nav-text);
            font-size: 26px;
            cursor: pointer;
            padding: 4px 8px;
        }

        .mobile-menu {
            display: none;
            background-color: var(--nav-bg);
            flex-direction: column;
            padding: 16px 20px 24px;
            gap: 4px;
        }

        .mobile-menu a {
            color: var(--nav-text);
            font-size: 16px;
            padding: 12px 4px;
            border-bottom: 1px solid rgba(255,255,255,0.08);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .mobile-menu a:hover,
        .mobile-menu a:focus {
            color: var(--accent-gold);
        }

        .mobile-menu .btn {
            margin-top: 12px;
            width: 100%;
        }

        /* Hero */
        .hero-section {
            position: relative;
            min-height: 580px;
            display: flex;
            align-items: center;
            background-image: url('/assets/images/7289a951641ae5da.jpg');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            padding: 80px 0;
            overflow: hidden;
        }

        .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(20,42,63,0.82) 0%, rgba(43,92,143,0.7) 55%, rgba(20,42,63,0.5) 100%);
        }

        .hero-content {
            position: relative;
            z-index: 5;
            max-width: 720px;
            color: #FFFFFF;
        }

        .hero-breadcrumb {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(200,155,90,0.2);
            border: 1px solid rgba(200,155,90,0.4);
            color: var(--accent-gold);
            padding: 6px 14px;
            border-radius: var(--radius-badge);
            font-size: 13px;
            font-weight: 500;
            margin-bottom: 20px;
        }

        .hero-content h1 {
            font-size: 42px;
            font-weight: 700;
            color: #FFFFFF;
            margin-bottom: 20px;
            line-height: 1.25;
            letter-spacing: 0.5px;
        }

        .hero-content .hero-desc {
            font-size: 17px;
            line-height: 1.8;
            color: rgba(255,255,255,0.92);
            margin-bottom: 32px;
            max-width: 640px;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            align-items: center;
        }

        .hero-actions .btn-primary {
            padding: 14px 32px;
            font-size: 16px;
        }

        .hero-actions .btn-outline-light {
            padding: 14px 28px;
            font-size: 16px;
        }

        .hero-play-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 68px;
            height: 68px;
            border-radius: 50%;
            background-color: rgba(255,255,255,0.18);
            border: 2px solid rgba(255,255,255,0.6);
            color: #FFFFFF;
            font-size: 28px;
            cursor: pointer;
            transition: var(--transition-default);
            margin-right: 20px;
        }

        .hero-play-btn:hover,
        .hero-play-btn:focus {
            background-color: var(--accent-gold);
            border-color: var(--accent-gold);
            color: #1B2A3A;
            transform: scale(1.08);
        }

        .hero-meta {
            display: flex;
            gap: 28px;
            margin-top: 40px;
            flex-wrap: wrap;
        }

        .hero-meta-item {
            display: flex;
            align-items: center;
            gap: 8px;
            color: rgba(255,255,255,0.9);
            font-size: 14px;
            font-weight: 500;
        }

        .hero-meta-item i {
            color: var(--accent-gold);
            font-size: 18px;
        }

        /* 板块通用 */
        .section {
            padding: var(--section-padding);
            position: relative;
        }

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

        .section-white {
            background-color: var(--section-bg-light);
        }

        .section-header {
            margin-bottom: 40px;
        }

        .section-header .section-tag {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            color: var(--accent-gold-dark);
            letter-spacing: 1.2px;
            text-transform: uppercase;
            margin-bottom: 10px;
        }

        .section-header h2 {
            font-size: 30px;
            margin-bottom: 12px;
            letter-spacing: 0.4px;
        }

        .section-header .section-desc {
            font-size: 16px;
            color: var(--text-secondary);
            max-width: 720px;
            margin-bottom: 0;
            line-height: 1.8;
        }

        /* 分类入口卡片 */
        .category-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
            gap: 24px;
        }

        .category-card {
            background-color: #FFFFFF;
            border-radius: var(--radius-card);
            border: 1px solid var(--border-color);
            box-shadow: var(--card-shadow);
            overflow: hidden;
            transition: var(--transition-default);
            display: flex;
            flex-direction: column;
        }

        .category-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--card-shadow-hover);
            border-color: rgba(43,92,143,0.25);
        }

        .category-card-img {
            width: 100%;
            height: 180px;
            object-fit: cover;
            background-color: #E3EBF2;
        }

        .category-card-body {
            padding: 18px 20px 20px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .category-card-body h3 {
            font-size: 19px;
            margin-bottom: 8px;
        }

        .category-card-body p {
            font-size: 14px;
            color: var(--text-secondary);
            margin-bottom: 16px;
            line-height: 1.6;
            flex: 1;
        }

        .category-card-link {
            font-size: 14px;
            font-weight: 600;
            color: var(--primary-blue);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .category-card-link:hover {
            color: var(--accent-gold-dark);
        }

        /* 资讯流 + 热榜 双栏 */
        .split-layout {
            display: grid;
            grid-template-columns: 1.6fr 1fr;
            gap: 36px;
            align-items: start;
        }

        .news-list {
            display: flex;
            flex-direction: column;
            gap: 20px;
            background: #FFFFFF;
            border-radius: var(--radius-card);
            padding: 28px;
            border: 1px solid var(--border-color);
            box-shadow: var(--card-shadow);
        }

        .news-list-title {
            font-size: 22px;
            margin-bottom: 8px;
        }

        .news-item {
            display: flex;
            gap: 16px;
            padding: 16px 0;
            border-bottom: 1px solid rgba(43,92,143,0.08);
            transition: var(--transition-default);
        }

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

        .news-item:hover {
            background-color: #F9FBFD;
            border-radius: 8px;
            padding-left: 8px;
            padding-right: 8px;
        }

        .news-item-img {
            width: 140px;
            min-width: 140px;
            height: 86px;
            border-radius: 8px;
            object-fit: cover;
            background-color: #E3EBF2;
        }

        .news-item-content h4 {
            font-size: 16px;
            margin-bottom: 6px;
            line-height: 1.45;
        }

        .news-item-content p {
            font-size: 13px;
            color: var(--text-secondary);
            margin-bottom: 6px;
            line-height: 1.5;
        }

        .news-item-meta {
            display: flex;
            gap: 16px;
            align-items: center;
            font-size: 12px;
            color: var(--text-muted);
        }

        .news-item-meta .badge {
            font-size: 11px;
            padding: 2px 10px;
        }

        .hot-list {
            background: #FFFFFF;
            border-radius: var(--radius-card);
            padding: 28px;
            border: 1px solid var(--border-color);
            box-shadow: var(--card-shadow);
        }

        .hot-list-title {
            font-size: 22px;
            margin-bottom: 16px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .hot-list-title i {
            color: var(--accent-gold);
        }

        .hot-item {
            display: flex;
            gap: 14px;
            align-items: center;
            padding: 12px 0;
            border-bottom: 1px solid rgba(43,92,143,0.08);
        }

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

        .hot-rank {
            width: 32px;
            height: 32px;
            min-width: 32px;
            border-radius: 50%;
            background-color: #E8F0F6;
            color: var(--primary-blue);
            font-weight: 700;
            font-size: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .hot-rank.top-1 {
            background-color: var(--accent-gold);
            color: #1B2A3A;
        }

        .hot-rank.top-2 {
            background-color: #D4AF7A;
            color: #1B2A3A;
        }

        .hot-rank.top-3 {
            background-color: #C48B5C;
            color: #FFFFFF;
        }

        .hot-item-thumb {
            width: 72px;
            min-width: 72px;
            height: 52px;
            border-radius: 6px;
            object-fit: cover;
            background-color: #E3EBF2;
        }

        .hot-item-info h4 {
            font-size: 14px;
            margin-bottom: 4px;
            line-height: 1.4;
        }

        .hot-item-info .hot-meta {
            font-size: 12px;
            color: var(--text-muted);
            display: flex;
            gap: 12px;
            align-items: center;
        }

        /* 数据优势条 */
        .stats-bar {
            background: linear-gradient(135deg, var(--nav-bg) 0%, var(--primary-blue-dark) 100%);
            border-radius: var(--radius-card);
            padding: 36px 32px;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
            gap: 24px;
            box-shadow: 0 4px 20px rgba(20,42,63,0.3);
        }

        .stat-item {
            text-align: center;
            padding: 8px 12px;
        }

        .stat-number {
            display: block;
            font-size: 38px;
            font-weight: 700;
            color: var(--accent-gold);
            line-height: 1.2;
            margin-bottom: 6px;
        }

        .stat-label {
            font-size: 14px;
            color: rgba(255,255,255,0.85);
            font-weight: 500;
        }

        /* 专题条 */
        .topic-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 24px;
        }

        .topic-card {
            position: relative;
            border-radius: var(--radius-card);
            overflow: hidden;
            min-height: 180px;
            background-size: cover;
            background-position: center;
            display: flex;
            align-items: flex-end;
            transition: var(--transition-default);
            border: 1px solid var(--border-color);
            box-shadow: var(--card-shadow);
        }

        .topic-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--card-shadow-hover);
        }

        .topic-card-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(20,42,63,0.1) 0%, rgba(20,42,63,0.75) 100%);
        }

        .topic-card-content {
            position: relative;
            z-index: 2;
            padding: 20px 22px;
            color: #FFFFFF;
            width: 100%;
        }

        .topic-card-content h3 {
            color: #FFFFFF;
            font-size: 18px;
            margin-bottom: 4px;
        }

        .topic-card-content p {
            font-size: 13px;
            color: rgba(255,255,255,0.88);
            margin-bottom: 0;
        }

        /* 精选视频卡片墙 */
        .video-card-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
            gap: 24px;
        }

        .video-card {
            background: #FFFFFF;
            border-radius: var(--radius-card);
            border: 1px solid var(--border-color);
            box-shadow: var(--card-shadow);
            overflow: hidden;
            transition: var(--transition-default);
            display: flex;
            flex-direction: column;
        }

        .video-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--card-shadow-hover);
        }

        .video-card-img {
            width: 100%;
            height: 150px;
            object-fit: cover;
            background-color: #E3EBF2;
            position: relative;
        }

        .video-card-img .video-duration {
            position: absolute;
            bottom: 8px;
            right: 8px;
            background: rgba(20,42,63,0.85);
            color: #FFFFFF;
            font-size: 12px;
            padding: 2px 8px;
            border-radius: 4px;
            font-weight: 500;
        }

        .video-card-body {
            padding: 16px 18px 18px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .video-card-body h3 {
            font-size: 16px;
            margin-bottom: 6px;
            line-height: 1.4;
        }

        .video-card-body p {
            font-size: 13px;
            color: var(--text-secondary);
            margin-bottom: 10px;
            flex: 1;
        }

        .video-card-footer {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 10px;
        }

        .video-card-footer .badge {
            font-size: 11px;
            padding: 2px 10px;
        }

        .video-card-link {
            font-size: 13px;
            font-weight: 600;
            color: var(--primary-blue);
        }

        /* 观看流程 */
        .process-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 28px;
        }

        .process-card {
            background: #FFFFFF;
            border-radius: var(--radius-card);
            padding: 28px 22px;
            border: 1px solid var(--border-color);
            box-shadow: var(--card-shadow);
            text-align: center;
            transition: var(--transition-default);
            position: relative;
        }

        .process-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--card-shadow-hover);
        }

        .process-step-icon {
            width: 60px;
            height: 60px;
            border-radius: 50%;
            background-color: #E8F0F6;
            color: var(--primary-blue);
            font-size: 24px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px;
        }

        .process-card h3 {
            font-size: 18px;
            margin-bottom: 8px;
        }

        .process-card p {
            font-size: 14px;
            color: var(--text-secondary);
            margin-bottom: 0;
            line-height: 1.6;
        }

        /* 最新动态列表 */
        .update-list {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
            gap: 20px;
        }

        .update-item {
            display: flex;
            gap: 16px;
            background: #FFFFFF;
            border-radius: var(--radius-card);
            padding: 20px;
            border: 1px solid var(--border-color);
            box-shadow: var(--card-shadow);
            transition: var(--transition-default);
        }

        .update-item:hover {
            transform: translateY(-3px);
            box-shadow: var(--card-shadow-hover);
        }

        .update-date-badge {
            min-width: 56px;
            height: 56px;
            border-radius: 10px;
            background-color: #E8F0F6;
            color: var(--primary-blue);
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            line-height: 1.2;
        }

        .update-date-badge .day {
            font-size: 20px;
        }

        .update-date-badge .month {
            font-size: 12px;
            font-weight: 500;
        }

        .update-item-content h3 {
            font-size: 16px;
            margin-bottom: 6px;
        }

        .update-item-content p {
            font-size: 14px;
            color: var(--text-secondary);
            margin-bottom: 0;
            line-height: 1.6;
        }

        /* 合作伙伴 */
        .partners-strip {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
            align-items: center;
            justify-content: center;
            background: #FFFFFF;
            border-radius: var(--radius-card);
            padding: 32px 28px;
            border: 1px solid var(--border-color);
            box-shadow: var(--card-shadow);
        }

        .partner-logo-placeholder {
            display: flex;
            align-items: center;
            justify-content: center;
            min-width: 130px;
            padding: 16px 20px;
            background-color: #F0F4F8;
            border-radius: 10px;
            font-size: 14px;
            font-weight: 600;
            color: var(--text-muted);
            letter-spacing: 0.5px;
            transition: var(--transition-default);
        }

        .partner-logo-placeholder:hover {
            background-color: #E3EBF2;
            color: var(--primary-blue);
        }

        /* 保障条 */
        .guarantee-strip {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 20px;
            background: linear-gradient(135deg, #F0F4F8 0%, #E8F0F6 100%);
            border-radius: var(--radius-card);
            padding: 32px 28px;
            border: 1px solid rgba(43,92,143,0.15);
        }

        .guarantee-item {
            display: flex;
            align-items: center;
            gap: 14px;
        }

        .guarantee-icon {
            width: 48px;
            height: 48px;
            min-width: 48px;
            border-radius: 50%;
            background-color: #FFFFFF;
            color: var(--primary-blue);
            font-size: 20px;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 2px 8px rgba(27,58,87,0.1);
        }

        .guarantee-item h4 {
            font-size: 15px;
            margin-bottom: 2px;
        }

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

        /* FAQ */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .faq-item {
            background: #FFFFFF;
            border-radius: 12px;
            border: 1px solid var(--border-color);
            overflow: hidden;
            transition: var(--transition-default);
        }

        .faq-item.active {
            border-color: var(--primary-blue-light);
            box-shadow: 0 4px 16px rgba(27,58,87,0.12);
        }

        .faq-question {
            padding: 18px 20px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            cursor: pointer;
            background-color: #F9FBFD;
            border: none;
            width: 100%;
            text-align: left;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-primary);
            transition: var(--transition-default);
        }

        .faq-question:hover,
        .faq-question:focus {
            background-color: #EDF3F8;
            color: var(--primary-blue);
        }

        .faq-question .faq-icon {
            min-width: 24px;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: transform 0.3s ease;
            color: var(--primary-blue);
            font-size: 14px;
        }

        .faq-item.active .faq-icon {
            transform: rotate(90deg);
        }

        .faq-answer {
            padding: 0 20px;
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
            background-color: #FFFFFF;
        }

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

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

        /* 订阅/App CTA */
        .subscribe-section {
            background: linear-gradient(135deg, var(--nav-bg) 0%, var(--primary-blue-dark) 100%);
            border-radius: var(--radius-card);
            padding: 48px 32px;
            text-align: center;
            color: #FFFFFF;
            box-shadow: 0 4px 24px rgba(20,42,63,0.35);
        }

        .subscribe-section h2 {
            color: #FFFFFF;
            font-size: 28px;
            margin-bottom: 12px;
        }

        .subscribe-section p {
            color: rgba(255,255,255,0.88);
            font-size: 16px;
            max-width: 560px;
            margin: 0 auto 28px;
            line-height: 1.7;
        }

        .subscribe-form {
            display: flex;
            gap: 12px;
            max-width: 480px;
            margin: 0 auto;
            flex-wrap: wrap;
            justify-content: center;
        }

        .subscribe-form input {
            flex: 1;
            min-width: 240px;
            padding: 14px 18px;
            border-radius: var(--radius-btn);
            border: 2px solid rgba(255,255,255,0.3);
            background-color: rgba(255,255,255,0.12);
            color: #FFFFFF;
            font-size: 15px;
            transition: var(--transition-default);
        }

        .subscribe-form input::placeholder {
            color: rgba(255,255,255,0.7);
        }

        .subscribe-form input:focus {
            outline: none;
            border-color: var(--accent-gold);
            background-color: rgba(255,255,255,0.2);
        }

        .subscribe-form .btn {
            min-width: 140px;
        }

        .subscribe-note {
            font-size: 13px;
            color: rgba(255,255,255,0.7);
            margin-top: 16px;
        }

        /* 页脚 */
        .site-footer {
            background-color: var(--nav-bg);
            color: rgba(255,255,255,0.75);
            padding: 48px 0 24px;
            margin-top: 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 32px;
            margin-bottom: 32px;
        }

        .footer-col h4 {
            color: #FFFFFF;
            font-size: 16px;
            margin-bottom: 16px;
            letter-spacing: 0.3px;
        }

        .footer-col ul {
            list-style: none;
            margin: 0;
            padding: 0;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .footer-col ul li a {
            color: rgba(255,255,255,0.75);
            font-size: 14px;
            transition: var(--transition-default);
        }

        .footer-col ul li a:hover,
        .footer-col ul li a:focus {
            color: var(--accent-gold);
        }

        .footer-brand {
            font-size: 20px;
            font-weight: 700;
            color: #FFFFFF;
            margin-bottom: 12px;
            display: block;
        }

        .footer-brand i {
            color: var(--accent-gold);
            margin-right: 6px;
        }

        .footer-brand-desc {
            font-size: 14px;
            color: rgba(255,255,255,0.65);
            margin-bottom: 16px;
            line-height: 1.6;
        }

        .footer-divider {
            border-top: 1px solid rgba(255,255,255,0.12);
            padding-top: 20px;
            text-align: center;
            font-size: 13px;
            color: rgba(255,255,255,0.6);
        }

        .footer-divider .copyright {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 6px;
            flex-wrap: wrap;
        }

        /* 响应式 */
        @media (max-width: 1024px) {
            .split-layout {
                grid-template-columns: 1fr;
                gap: 28px;
            }

            .hero-content h1 {
                font-size: 34px;
            }

            .section-header h2 {
                font-size: 26px;
            }

            .video-card-grid {
                grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
            }
        }

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

            .hamburger {
                display: block;
            }

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

            .hero-section {
                min-height: 480px;
                padding: 60px 0;
            }

            .hero-content h1 {
                font-size: 28px;
            }

            .hero-content .hero-desc {
                font-size: 15px;
            }

            .hero-actions {
                flex-direction: column;
                align-items: flex-start;
            }

            .hero-play-btn {
                width: 56px;
                height: 56px;
                font-size: 22px;
            }

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

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

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

            .update-list {
                grid-template-columns: 1fr;
            }

            .section {
                padding: 44px 0;
            }

            .stats-bar {
                grid-template-columns: repeat(2, 1fr);
                padding: 24px 16px;
            }

            .stat-number {
                font-size: 28px;
            }

            .news-item {
                flex-direction: column;
            }

            .news-item-img {
                width: 100%;
                min-width: auto;
                height: 140px;
            }

            .guarantee-strip {
                grid-template-columns: 1fr;
            }

            .subscribe-section {
                padding: 32px 18px;
            }

            .subscribe-form {
                flex-direction: column;
            }

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

            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 24px;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding-left: 14px;
                padding-right: 14px;
            }

            .hero-section {
                min-height: 420px;
                padding: 48px 0;
            }

            .hero-content h1 {
                font-size: 24px;
            }

            .hero-meta {
                gap: 14px;
                flex-direction: column;
                align-items: flex-start;
            }

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

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

            .video-card-grid {
                grid-template-columns: 1fr;
            }

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

            .hot-item {
                flex-wrap: wrap;
            }

            .hot-item-thumb {
                width: 100%;
                min-width: auto;
                height: 100px;
            }
        }

/* roulang page: category1 */
:root {
    --primary-blue: #2B5C8F;
    --primary-blue-light: #3A6EA5;
    --primary-blue-dark: #1E4A73;
    --accent-gold: #C89B5A;
    --accent-gold-dark: #B98A44;
    --nav-bg: #142A3F;
    --nav-text: #E6EDF4;
    --body-bg: #F5F8FB;
    --section-bg-light: #FFFFFF;
    --section-bg-alt: #EEF3F8;
    --text-primary: #1B2A3A;
    --text-secondary: #4A5A6A;
    --text-muted: #7A8A9A;
    --border-color: rgba(43,92,143,0.12);
    --card-shadow: 0 2px 12px rgba(27,58,87,0.08);
    --card-shadow-hover: 0 8px 24px rgba(27,58,87,0.14);
    --radius-card: 14px;
    --radius-btn: 9px;
    --radius-badge: 999px;
    --transition-default: all 0.25s ease;
    --font-family: 'PingFang SC','Microsoft YaHei','Noto Sans SC',system-ui,-apple-system,'Segoe UI',Roboto,sans-serif;
    --container-max: 1200px;
    --section-padding: 64px 0;
    --card-padding: 20px;
    --nav-height: 68px;
}

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

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

body {
    font-family: var(--font-family);
    font-size: 16px;
    line-height: 1.7;
    color: var(--text-primary);
    background-color: var(--body-bg);
    margin: 0;
    padding: 0;
    overflow-x: hidden;
}

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

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

a:hover,
a:focus {
    color: var(--accent-gold-dark);
    text-decoration: none;
    outline: none;
}

a:focus-visible {
    outline: 3px solid var(--primary-blue-light);
    outline-offset: 2px;
}

button,
input,
select,
textarea {
    font-family: var(--font-family);
    font-size: 16px;
    line-height: 1.5;
}

button:focus-visible,
input:focus-visible {
    outline: 3px solid var(--primary-blue-light);
    outline-offset: 2px;
}

.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding-left: 20px;
    padding-right: 20px;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 26px;
    border-radius: var(--radius-btn);
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-default);
    border: 2px solid transparent;
    line-height: 1.4;
    text-align: center;
    white-space: nowrap;
}

.btn-primary {
    background-color: var(--accent-gold);
    color: #1B2A3A;
    border-color: var(--accent-gold);
}

.btn-primary:hover,
.btn-primary:focus {
    background-color: var(--accent-gold-dark);
    border-color: var(--accent-gold-dark);
    color: #0F1A24;
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(185,138,68,0.3);
}

.btn-secondary {
    background-color: transparent;
    color: var(--primary-blue);
    border-color: var(--primary-blue);
}

.btn-secondary:hover,
.btn-secondary:focus {
    background-color: var(--primary-blue);
    color: #FFFFFF;
    border-color: var(--primary-blue);
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(43,92,143,0.25);
}

.btn-outline-light {
    background-color: transparent;
    color: #FFFFFF;
    border-color: rgba(255,255,255,0.6);
}

.btn-outline-light:hover,
.btn-outline-light:focus {
    background-color: rgba(255,255,255,0.15);
    border-color: #FFFFFF;
    color: #FFFFFF;
    transform: translateY(-2px);
}

.badge {
    display: inline-block;
    padding: 4px 12px;
    border-radius: var(--radius-badge);
    font-size: 12px;
    font-weight: 600;
    line-height: 1.6;
    letter-spacing: 0.3px;
}

.badge-blue {
    background-color: #E8F0F6;
    color: var(--primary-blue);
}

.badge-gold {
    background-color: #F8EFDF;
    color: var(--accent-gold-dark);
}

.badge-dark {
    background-color: var(--nav-bg);
    color: var(--nav-text);
}

/* 导航 */
.site-header {
    background-color: var(--nav-bg);
    min-height: var(--nav-height);
    display: flex;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0,0,0,0.12);
}

.site-header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    gap: 20px;
}

.site-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 20px;
    font-weight: 700;
    color: var(--nav-text);
    letter-spacing: 0.5px;
    flex-shrink: 0;
}

.site-logo i {
    color: var(--accent-gold);
    font-size: 24px;
}

.site-logo:hover,
.site-logo:focus {
    color: #FFFFFF;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 32px;
    list-style: none;
    margin: 0;
    padding: 0;
}

.nav-links a {
    color: var(--nav-text);
    font-size: 15px;
    font-weight: 500;
    padding: 8px 0;
    position: relative;
    letter-spacing: 0.3px;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--accent-gold);
    transition: width 0.25s ease;
}

.nav-links a:hover::after,
.nav-links a:focus::after,
.nav-links a.active::after {
    width: 100%;
}

.nav-links a:hover,
.nav-links a:focus,
.nav-links a.active {
    color: #FFFFFF;
}

.nav-cta {
    flex-shrink: 0;
    padding: 10px 22px;
    font-size: 14px;
}

.nav-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--nav-text);
    font-size: 24px;
    cursor: pointer;
    padding: 8px;
    line-height: 1;
}

.nav-toggle:hover,
.nav-toggle:focus {
    color: var(--accent-gold);
}

/* 分类页 H1 区 */
.category-hero {
    background: linear-gradient(180deg, #F0F5FA 0%, #EEF3F8 100%);
    padding: 48px 0 36px;
    border-bottom: 1px solid var(--border-color);
}

.category-hero .container {
    max-width: 1000px;
}

.category-hero h1 {
    font-size: 32px;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0 0 12px;
    line-height: 1.3;
    letter-spacing: 0.5px;
}

.category-hero .category-subtitle {
    font-size: 16px;
    color: var(--text-secondary);
    margin: 0;
    line-height: 1.8;
    max-width: 750px;
}

.breadcrumb-row {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    color: var(--text-muted);
    margin-bottom: 14px;
}

.breadcrumb-row a {
    color: var(--primary-blue);
}

.breadcrumb-row a:hover {
    color: var(--accent-gold-dark);
}

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

/* 数据条 */
.stats-strip {
    background-color: var(--nav-bg);
    padding: 22px 0;
    border-bottom: 1px solid rgba(255,255,255,0.06);
}

.stats-strip .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 16px 28px;
}

.stat-item {
    display: flex;
    align-items: center;
    gap: 10px;
    color: #E6EDF4;
}

.stat-item i {
    color: var(--accent-gold);
    font-size: 18px;
    width: 22px;
    text-align: center;
}

.stat-number {
    font-size: 22px;
    font-weight: 700;
    color: var(--accent-gold);
    letter-spacing: 0.5px;
    line-height: 1.2;
}

.stat-label {
    font-size: 13px;
    color: var(--nav-text);
    line-height: 1.4;
}

/* 筛选标签区 */
.filter-bar {
    padding: 28px 0 12px;
    background-color: var(--section-bg-light);
}

.filter-label {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 12px;
    letter-spacing: 0.5px;
}

.filter-tags {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
}

.filter-tag {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 18px;
    border-radius: var(--radius-badge);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    border: 2px solid var(--border-color);
    background-color: #FFFFFF;
    color: var(--text-secondary);
    transition: var(--transition-default);
    line-height: 1.4;
}

.filter-tag:hover,
.filter-tag:focus {
    border-color: var(--primary-blue-light);
    color: var(--primary-blue);
    background-color: #F0F5FA;
}

.filter-tag.active {
    background-color: var(--primary-blue);
    color: #FFFFFF;
    border-color: var(--primary-blue);
}

.filter-tag i {
    font-size: 13px;
    opacity: 0.8;
}

/* 视频卡片列表 */
.video-list-section {
    padding: 32px 0 56px;
    background-color: var(--section-bg-light);
}

.video-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-top: 20px;
}

.video-card {
    background-color: #FFFFFF;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-card);
    box-shadow: var(--card-shadow);
    overflow: hidden;
    transition: var(--transition-default);
    display: flex;
    flex-direction: column;
}

.video-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--card-shadow-hover);
    border-color: rgba(43,92,143,0.2);
}

.video-card-cover {
    position: relative;
    aspect-ratio: 16 / 9;
    overflow: hidden;
    background-color: #E8EEF4;
}

.video-card-cover img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
}

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

.video-duration {
    position: absolute;
    bottom: 10px;
    right: 10px;
    background-color: rgba(20,42,63,0.85);
    color: #FFFFFF;
    font-size: 12px;
    font-weight: 600;
    padding: 3px 10px;
    border-radius: 6px;
    letter-spacing: 0.3px;
}

.video-card-body {
    padding: 18px 18px 20px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    flex: 1;
}

.video-card-title {
    font-size: 17px;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
    line-height: 1.45;
}

.video-card-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.video-card-meta {
    font-size: 13px;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 14px;
    margin-top: 2px;
}

.video-card-meta span {
    display: inline-flex;
    align-items: center;
    gap: 5px;
}

.video-card-meta i {
    font-size: 12px;
    color: var(--primary-blue-light);
}

.video-card-link {
    font-size: 14px;
    font-weight: 600;
    color: var(--primary-blue);
    display: inline-flex;
    align-items: center;
    gap: 6px;
    margin-top: 6px;
    transition: var(--transition-default);
}

.video-card-link:hover {
    color: var(--accent-gold-dark);
    gap: 10px;
}

.load-more-row {
    display: flex;
    justify-content: center;
    margin-top: 32px;
}

.load-more-btn {
    padding: 12px 36px;
    font-size: 15px;
}

/* 热门视频板块 */
.hot-video-section {
    padding: 56px 0;
    background-color: var(--section-bg-alt);
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

.section-title {
    font-size: 26px;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0 0 8px;
    line-height: 1.35;
    letter-spacing: 0.4px;
}

.section-subtitle {
    font-size: 15px;
    color: var(--text-secondary);
    margin: 0 0 28px;
    line-height: 1.7;
    max-width: 650px;
}

.hot-video-scroll {
    display: flex;
    gap: 18px;
    overflow-x: auto;
    padding-bottom: 12px;
    scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
}

.hot-video-scroll::-webkit-scrollbar {
    height: 6px;
}

.hot-video-scroll::-webkit-scrollbar-track {
    background: rgba(43,92,143,0.08);
    border-radius: 999px;
}

.hot-video-scroll::-webkit-scrollbar-thumb {
    background: rgba(43,92,143,0.25);
    border-radius: 999px;
}

.hot-video-scroll::-webkit-scrollbar-thumb:hover {
    background: rgba(43,92,143,0.4);
}

.hv-card {
    min-width: 260px;
    max-width: 260px;
    flex-shrink: 0;
    scroll-snap-align: start;
    background-color: #FFFFFF;
    border: 1px solid var(--border-color);
    border-radius: 12px;
    box-shadow: var(--card-shadow);
    overflow: hidden;
    transition: var(--transition-default);
}

.hv-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--card-shadow-hover);
}

.hv-card-cover {
    aspect-ratio: 16 / 9;
    overflow: hidden;
    background-color: #E8EEF4;
    position: relative;
}

.hv-card-cover img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.hv-card-body {
    padding: 14px 16px 16px;
}

.hv-card-title {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 8px;
    line-height: 1.4;
}

.hv-card-meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 12px;
    color: var(--text-muted);
}

.hv-card-meta .heat {
    color: var(--accent-gold-dark);
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.hv-card-meta .heat i {
    font-size: 11px;
}

/* 更新动态板块 */
.update-section {
    padding: 56px 0;
    background-color: var(--section-bg-light);
}

.update-timeline {
    position: relative;
    padding-left: 28px;
    margin-top: 8px;
}

.update-timeline::before {
    content: '';
    position: absolute;
    left: 8px;
    top: 4px;
    bottom: 4px;
    width: 2px;
    background-color: rgba(43,92,143,0.15);
}

.update-item {
    position: relative;
    padding: 0 0 24px 20px;
}

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

.update-item::before {
    content: '';
    position: absolute;
    left: -24px;
    top: 6px;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background-color: var(--accent-gold);
    border: 2px solid #FFFFFF;
    box-shadow: 0 0 0 2px rgba(200,155,90,0.3);
}

.update-date {
    font-size: 12px;
    font-weight: 600;
    color: var(--accent-gold-dark);
    letter-spacing: 0.5px;
    text-transform: uppercase;
    margin-bottom: 4px;
}

.update-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 6px;
    line-height: 1.5;
}

.update-excerpt {
    font-size: 14px;
    color: var(--text-muted);
    margin: 0;
    line-height: 1.7;
    max-width: 700px;
}

/* 观看说明板块 */
.guide-section {
    padding: 56px 0;
    background-color: var(--section-bg-alt);
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

.guide-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin-top: 8px;
}

.guide-card {
    background-color: #FFFFFF;
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 24px 20px;
    text-align: center;
    transition: var(--transition-default);
}

.guide-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--card-shadow-hover);
    border-color: rgba(43,92,143,0.2);
}

.guide-icon {
    width: 52px;
    height: 52px;
    border-radius: 50%;
    background-color: #E8F0F6;
    color: var(--primary-blue);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 14px;
    font-size: 20px;
    transition: var(--transition-default);
}

.guide-card:hover .guide-icon {
    background-color: var(--primary-blue);
    color: #FFFFFF;
}

.guide-card h3 {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 8px;
    line-height: 1.4;
}

.guide-card p {
    font-size: 13px;
    color: var(--text-muted);
    margin: 0;
    line-height: 1.7;
}

/* FAQ板块 */
.faq-section {
    padding: 56px 0;
    background-color: var(--section-bg-light);
}

.faq-list {
    max-width: 800px;
    margin-top: 16px;
}

.faq-item {
    border: 1px solid var(--border-color);
    border-radius: 10px;
    margin-bottom: 12px;
    overflow: hidden;
    background-color: #FFFFFF;
    transition: var(--transition-default);
}

.faq-item:hover {
    border-color: rgba(43,92,143,0.22);
}

.faq-question {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 16px 20px;
    cursor: pointer;
    background-color: #F0F5FA;
    border: none;
    width: 100%;
    text-align: left;
    font-size: 15px;
    font-weight: 600;
    color: var(--text-primary);
    transition: var(--transition-default);
    line-height: 1.5;
}

.faq-question:hover,
.faq-question:focus {
    background-color: #E8F0F6;
    color: var(--primary-blue);
}

.faq-question .fa-chevron-down {
    font-size: 14px;
    color: var(--text-muted);
    transition: transform 0.3s ease;
    flex-shrink: 0;
}

.faq-item.open .faq-question .fa-chevron-down {
    transform: rotate(180deg);
    color: var(--accent-gold-dark);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.35s ease, padding 0.35s ease;
    padding: 0 20px;
    background-color: #FFFFFF;
}

.faq-item.open .faq-answer {
    max-height: 300px;
    padding: 16px 20px 20px;
}

.faq-answer p {
    font-size: 14px;
    color: var(--text-secondary);
    margin: 0;
    line-height: 1.8;
}

/* CTA转化区 */
.cta-section {
    padding: 56px 0;
    background-color: var(--nav-bg);
}

.cta-card {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 32px;
    flex-wrap: wrap;
}

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

.cta-text h2 {
    font-size: 26px;
    font-weight: 700;
    color: #FFFFFF;
    margin: 0 0 8px;
    line-height: 1.35;
}

.cta-text p {
    font-size: 15px;
    color: #B8C7D8;
    margin: 0;
    line-height: 1.7;
    max-width: 520px;
}

.cta-actions {
    display: flex;
    gap: 14px;
    flex-wrap: wrap;
    flex-shrink: 0;
}

/* 页脚 */
.site-footer {
    background-color: var(--nav-bg);
    padding: 48px 0 24px;
    border-top: 1px solid rgba(255,255,255,0.06);
}

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

.footer-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 18px;
    font-weight: 700;
    color: #FFFFFF;
    letter-spacing: 0.5px;
    margin-bottom: 12px;
}

.footer-brand i {
    color: var(--accent-gold);
    font-size: 20px;
}

.footer-brand:hover,
.footer-brand:focus {
    color: var(--accent-gold);
}

.footer-brand-desc {
    font-size: 13px;
    color: #A8B8C8;
    margin: 0 0 8px;
    line-height: 1.7;
    max-width: 300px;
}

.footer-col h4 {
    font-size: 15px;
    font-weight: 600;
    color: #FFFFFF;
    margin: 0 0 16px;
    letter-spacing: 0.5px;
}

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

.footer-col ul li {
    margin-bottom: 10px;
}

.footer-col ul li a {
    font-size: 14px;
    color: #A8B8C8;
    transition: var(--transition-default);
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.footer-col ul li a:hover,
.footer-col ul li a:focus {
    color: var(--accent-gold);
}

.footer-divider {
    border-top: 1px solid rgba(255,255,255,0.08);
    padding-top: 20px;
}

.copyright {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px 16px;
    font-size: 13px;
    color: #7A8A9A;
}

.copyright span {
    display: inline;
}

/* 响应式 */
@media (max-width: 1024px) {
    .video-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .guide-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 24px;
    }
    .nav-links {
        gap: 20px;
    }
}

@media (max-width: 768px) {
    :root {
        --section-padding: 44px 0;
    }
    .category-hero {
        padding: 36px 0 28px;
    }
    .category-hero h1 {
        font-size: 26px;
    }
    .stats-strip .container {
        gap: 12px 20px;
        justify-content: flex-start;
    }
    .stat-number {
        font-size: 18px;
    }
    .stat-label {
        font-size: 12px;
    }
    .section-title {
        font-size: 22px;
    }
    .video-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }
    .guide-grid {
        grid-template-columns: 1fr;
        gap: 14px;
    }
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    .cta-card {
        flex-direction: column;
        align-items: flex-start;
    }
}

@media (max-width: 640px) {
    .site-header .container {
        flex-wrap: wrap;
        padding-top: 8px;
        padding-bottom: 8px;
    }
    .site-logo {
        font-size: 17px;
    }
    .nav-links {
        display: none;
        flex-direction: column;
        width: 100%;
        gap: 0;
        background-color: var(--nav-bg);
        padding: 8px 0 16px;
        border-top: 1px solid rgba(255,255,255,0.08);
        margin-top: 8px;
    }
    .nav-links.open {
        display: flex;
    }
    .nav-links a {
        padding: 10px 0;
        font-size: 15px;
        display: block;
    }
    .nav-cta {
        display: none;
    }
    .nav-toggle {
        display: block;
    }
    .category-hero h1 {
        font-size: 22px;
    }
    .category-hero .category-subtitle {
        font-size: 14px;
    }
    .filter-tags {
        gap: 8px;
    }
    .filter-tag {
        padding: 6px 14px;
        font-size: 13px;
    }
    .hot-video-scroll {
        gap: 12px;
    }
    .hv-card {
        min-width: 220px;
        max-width: 220px;
    }
    .section-title {
        font-size: 20px;
    }
    .faq-question {
        font-size: 14px;
        padding: 14px 16px;
    }
    .cta-text h2 {
        font-size: 22px;
    }
    .btn {
        padding: 10px 20px;
        font-size: 14px;
    }
}

@media (min-width: 641px) {
    .nav-toggle {
        display: none;
    }
    .nav-links {
        display: flex !important;
    }
}