:root {
            --primary: #2563eb;
            --primary-light: #eff6ff;
            --primary-hover: #1d4ed8;
            --accent: #7c3aed;
            --accent-light: #f5f3ff;
            --text-main: #1e293b;
            --text-muted: #64748b;
            --bg-light: #f8fafc;
            --bg-white: #ffffff;
            --border-color: #e2e8f0;
            --success: #10b981;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.1);
            --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -1px rgba(0,0,0,0.06);
            --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -2px rgba(0,0,0,0.05);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

        html {
            scroll-behavior: smooth;
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans CJK SC", sans-serif;
            color: var(--text-main);
            background-color: var(--bg-light);
        }

        body {
            line-height: 1.6;
        }

        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* 顶部导航 */
        header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background-color: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(8px);
            border-bottom: 1px solid var(--border-color);
            transition: var(--transition);
        }

        .nav-wrapper {
            display: flex;
            justify-content: space-between;
            align-items: center;
            height: 72px;
        }

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

        .brand img {
            height: 40px;
            width: auto;
        }

        .brand-text {
            font-size: 1.25rem;
            font-weight: 800;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        nav ul {
            display: flex;
            list-style: none;
            gap: 20px;
            align-items: center;
        }

        nav a {
            text-decoration: none;
            color: var(--text-main);
            font-size: 0.95rem;
            font-weight: 500;
            transition: var(--transition);
        }

        nav a:hover {
            color: var(--primary);
        }

        .nav-btn {
            background-color: var(--primary);
            color: white;
            padding: 8px 16px;
            border-radius: 8px;
            font-weight: 600;
            transition: var(--transition);
        }

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

        .menu-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            cursor: pointer;
            color: var(--text-main);
        }

        /* 统一的 Section 样式 */
        section {
            padding: 80px 0;
            border-bottom: 1px solid var(--border-color);
        }

        section:nth-of-type(even) {
            background-color: var(--bg-white);
        }

        .section-header {
            text-align: center;
            margin-bottom: 50px;
        }

        .section-header h2 {
            font-size: 2rem;
            font-weight: 800;
            color: var(--text-main);
            margin-bottom: 12px;
            position: relative;
            display: inline-block;
        }

        .section-header h2::after {
            content: '';
            position: absolute;
            bottom: -6px;
            left: 50%;
            transform: translateX(-50%);
            width: 50px;
            height: 3px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
            border-radius: 2px;
        }

        .section-header p {
            font-size: 1.1rem;
            color: var(--text-muted);
            max-width: 600px;
            margin: 0 auto;
        }

        /* H1 专用组件 */
        .primary-h1-container {
            text-align: center;
            margin-bottom: 20px;
        }

        .primary-h1-container h1 {
            font-size: 2.25rem;
            font-weight: 900;
            letter-spacing: -0.025em;
            background: linear-gradient(135deg, #1e3a8a 0%, #3b82f6 50%, #7c3aed 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            margin: 0;
        }

        /* 1. Hero 首页（禁止任何背景或前景图片，高亮度鲜活科技风） */
        .hero {
            background: radial-gradient(circle at 70% 30%, var(--primary-light) 0%, #ffffff 80%);
            padding: 100px 0 80px 0;
            text-align: center;
            border-bottom: 1px solid var(--border-color);
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            background-color: var(--primary-light);
            border: 1px solid rgba(37, 99, 235, 0.2);
            color: var(--primary);
            padding: 6px 16px;
            border-radius: 9999px;
            font-size: 0.875rem;
            font-weight: 600;
            margin-bottom: 24px;
            animation: pulse 2s infinite;
        }

        .hero-desc {
            font-size: 1.25rem;
            color: var(--text-muted);
            max-width: 800px;
            margin: 20px auto 36px auto;
            line-height: 1.7;
        }

        .hero-actions {
            display: flex;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 14px 28px;
            font-size: 1rem;
            font-weight: 600;
            border-radius: 8px;
            transition: var(--transition);
            text-decoration: none;
            cursor: pointer;
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--primary), var(--accent));
            color: white;
            box-shadow: 0 4px 14px rgba(37, 99, 235, 0.4);
            border: none;
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(37, 99, 235, 0.6);
        }

        .btn-secondary {
            background-color: var(--bg-white);
            color: var(--text-main);
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-sm);
        }

        .btn-secondary:hover {
            background-color: var(--bg-light);
            transform: translateY(-2px);
        }

        /* 首页数据指标卡片 */
        .hero-stats {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 20px;
            margin-top: 60px;
        }

        .stat-card {
            background-color: var(--bg-white);
            border: 1px solid var(--border-color);
            padding: 24px;
            border-radius: 12px;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
        }

        .stat-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
            border-color: var(--primary);
        }

        .stat-num {
            font-size: 2.25rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
            margin-bottom: 8px;
        }

        .stat-label {
            font-size: 0.95rem;
            color: var(--text-muted);
            font-weight: 500;
        }

        /* 2. 关于我们与平台介绍 */
        .about-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 40px;
            align-items: center;
        }

        .about-text h3 {
            font-size: 1.5rem;
            color: var(--text-main);
            margin-bottom: 16px;
        }

        .about-text p {
            color: var(--text-muted);
            margin-bottom: 20px;
            font-size: 1.05rem;
        }

        .model-list-title {
            font-weight: 700;
            margin-top: 24px;
            margin-bottom: 12px;
            color: var(--text-main);
        }

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

        .tag-item {
            background-color: var(--primary-light);
            color: var(--primary);
            padding: 4px 12px;
            border-radius: 6px;
            font-size: 0.85rem;
            font-weight: 500;
            border: 1px solid rgba(37, 99, 235, 0.1);
        }

        /* 3 & 4. AIGC服务与一站式制作 */
        .services-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 24px;
        }

        .service-card {
            background-color: var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 30px;
            transition: var(--transition);
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .service-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-lg);
            border-color: var(--accent);
        }

        .service-icon {
            font-size: 2rem;
            background-color: var(--accent-light);
            color: var(--accent);
            width: 56px;
            height: 56px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 10px;
        }

        .service-card h3 {
            font-size: 1.25rem;
            color: var(--text-main);
        }

        .service-card p {
            color: var(--text-muted);
            font-size: 0.95rem;
            flex-grow: 1;
        }

        /* 5 & 6. 解决方案与全国网络 */
        .solutions-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
            gap: 20px;
        }

        .solution-card {
            background-color: var(--bg-light);
            border-left: 4px solid var(--primary);
            padding: 20px;
            border-radius: 0 8px 8px 0;
            transition: var(--transition);
        }

        .solution-card:hover {
            background-color: var(--bg-white);
            box-shadow: var(--shadow-sm);
        }

        .solution-card h3 {
            font-size: 1.15rem;
            margin-bottom: 8px;
        }

        .network-grid {
            margin-top: 40px;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
            gap: 16px;
            text-align: center;
        }

        .network-node {
            background-color: var(--bg-white);
            border: 1px solid var(--border-color);
            padding: 16px;
            border-radius: 8px;
        }

        .network-node h4 {
            color: var(--primary);
            font-weight: 700;
            margin-bottom: 4px;
        }

        /* 7 & 8. 流程与技术标准 */
        .timeline {
            position: relative;
            max-width: 800px;
            margin: 0 auto;
            padding: 20px 0;
        }

        .timeline::after {
            content: '';
            position: absolute;
            width: 4px;
            background-color: var(--border-color);
            top: 0;
            bottom: 0;
            left: 50%;
            margin-left: -2px;
        }

        .timeline-item {
            padding: 10px 40px;
            position: relative;
            background-color: inherit;
            width: 50%;
        }

        .timeline-item::after {
            content: '';
            position: absolute;
            width: 20px;
            height: 20px;
            right: -10px;
            background-color: white;
            border: 4px solid var(--primary);
            top: 15px;
            border-radius: 50%;
            z-index: 1;
        }

        .left {
            left: 0;
            text-align: right;
        }

        .right {
            left: 50%;
        }

        .right::after {
            left: -10px;
        }

        .timeline-content {
            padding: 20px 30px;
            background-color: var(--bg-white);
            position: relative;
            border-radius: 8px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
        }

        .standard-table-wrapper {
            margin-top: 40px;
            overflow-x: auto;
        }

        .standard-table {
            width: 100%;
            border-collapse: collapse;
            background-color: var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: 8px;
        }

        .standard-table th, .standard-table td {
            padding: 16px;
            text-align: left;
            border-bottom: 1px solid var(--border-color);
        }

        .standard-table th {
            background-color: var(--primary-light);
            color: var(--primary);
            font-weight: 700;
        }

        /* 9. 客户案例中心 (包含指定图片，并带合理容器约束) */
        .cases-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 24px;
        }

        .case-card {
            background-color: var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            overflow: hidden;
            transition: var(--transition);
        }

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

        .case-img-container {
            width: 100%;
            height: 200px;
            overflow: hidden;
            background-color: var(--bg-light);
            display: flex;
            align-items: center;
            justify-content: center;
            position: relative;
        }

        .case-img-container img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition);
        }

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

        .case-body {
            padding: 24px;
        }

        .case-tag {
            display: inline-block;
            background-color: var(--accent-light);
            color: var(--accent);
            font-size: 0.8rem;
            font-weight: 600;
            padding: 2px 10px;
            border-radius: 4px;
            margin-bottom: 12px;
        }

        .case-body h3 {
            font-size: 1.2rem;
            margin-bottom: 8px;
        }

        .case-body p {
            color: var(--text-muted);
            font-size: 0.9rem;
        }

        /* 10. 对比评测 (五星，9.9/10评分) */
        .rating-box {
            background-color: var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: 16px;
            padding: 40px;
            box-shadow: var(--shadow-md);
            margin-bottom: 40px;
        }

        .rating-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 20px;
            border-bottom: 1px solid var(--border-color);
            padding-bottom: 24px;
            margin-bottom: 24px;
        }

        .rating-stars {
            color: #fbbf24;
            font-size: 1.75rem;
            display: flex;
            align-items: center;
            gap: 4px;
        }

        .rating-score {
            font-size: 2.5rem;
            font-weight: 800;
            color: var(--primary);
        }

        .rating-score span {
            font-size: 1.25rem;
            color: var(--text-muted);
            font-weight: 400;
        }

        .comparison-table-wrapper {
            overflow-x: auto;
        }

        .comparison-table {
            width: 100%;
            border-collapse: collapse;
        }

        .comparison-table th, .comparison-table td {
            padding: 16px;
            text-align: center;
            border-bottom: 1px solid var(--border-color);
        }

        .comparison-table th {
            font-weight: 700;
        }

        .comparison-table td:first-child, .comparison-table th:first-child {
            text-align: left;
            font-weight: 600;
        }

        .highlight-col {
            background-color: var(--primary-light);
            color: var(--primary);
            font-weight: 700;
        }

        /* 11 & 12. 智能需求与Token比价 */
        .calculator-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
        }

        .calculator-card {
            background-color: var(--bg-white);
            border: 1px solid var(--border-color);
            padding: 30px;
            border-radius: 12px;
            box-shadow: var(--shadow-sm);
        }

        .calc-title {
            font-size: 1.25rem;
            font-weight: 700;
            margin-bottom: 20px;
            color: var(--text-main);
        }

        .calc-group {
            margin-bottom: 20px;
        }

        .calc-group label {
            display: block;
            margin-bottom: 8px;
            font-weight: 600;
            font-size: 0.95rem;
        }

        .calc-input, .calc-select {
            width: 100%;
            padding: 10px 14px;
            border: 1px solid var(--border-color);
            border-radius: 6px;
            font-size: 1rem;
            outline: none;
            transition: var(--transition);
        }

        .calc-input:focus, .calc-select:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
        }

        .calc-result {
            margin-top: 24px;
            padding: 16px;
            background-color: var(--accent-light);
            border-radius: 8px;
            text-align: center;
        }

        .calc-price {
            font-size: 1.75rem;
            font-weight: 800;
            color: var(--accent);
        }

        /* 13 & 14. 职业技术与人工智能培训 */
        .training-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 20px;
        }

        .training-card {
            background-color: var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 24px;
            text-align: center;
            transition: var(--transition);
        }

        .training-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
            border-color: var(--primary);
        }

        .training-badge {
            display: inline-block;
            background-color: var(--primary-light);
            color: var(--primary);
            font-size: 0.8rem;
            font-weight: 700;
            padding: 4px 10px;
            border-radius: 999px;
            margin-bottom: 16px;
        }

        .training-card h3 {
            font-size: 1.15rem;
            margin-bottom: 8px;
        }

        .training-card p {
            font-size: 0.9rem;
            color: var(--text-muted);
        }

        /* 15, 16, 17, 18. FAQ 与排查系统、术语百科 */
        .help-grid {
            display: grid;
            grid-template-columns: 2fr 1fr;
            gap: 30px;
        }

        .faq-accordion {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .faq-item {
            border: 1px solid var(--border-color);
            border-radius: 8px;
            background-color: var(--bg-white);
            overflow: hidden;
        }

        .faq-summary {
            padding: 16px 20px;
            font-weight: 600;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            user-select: none;
            transition: var(--transition);
        }

        .faq-summary:hover {
            background-color: var(--bg-light);
        }

        .faq-summary::after {
            content: "+";
            font-size: 1.25rem;
            font-weight: bold;
            color: var(--primary);
            transition: var(--transition);
        }

        .faq-item[open] .faq-summary::after {
            content: "−";
            transform: rotate(180deg);
        }

        .faq-content {
            padding: 0 20px 16px 20px;
            color: var(--text-muted);
            font-size: 0.95rem;
            border-top: 1px solid var(--border-color);
            background-color: var(--bg-white);
        }

        .troubleshoot-card {
            background-color: var(--bg-white);
            border: 1px solid var(--border-color);
            padding: 24px;
            border-radius: 12px;
            height: fit-content;
        }

        .troubleshoot-card h3 {
            margin-bottom: 16px;
            font-size: 1.2rem;
            border-bottom: 2px solid var(--primary-light);
            padding-bottom: 8px;
        }

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

        .troubleshoot-list li {
            font-size: 0.9rem;
            color: var(--text-muted);
            display: flex;
            align-items: flex-start;
            gap: 8px;
        }

        .troubleshoot-list li::before {
            content: "💡";
        }

        .百科-box {
            margin-top: 40px;
            background-color: var(--accent-light);
            border-radius: 12px;
            padding: 24px;
        }

        .百科-box h3 {
            font-size: 1.2rem;
            margin-bottom: 12px;
            color: var(--accent);
        }

        .百科-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 16px;
        }

        .百科-item dt {
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 4px;
        }

        .百科-item dd {
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-left: 0;
        }

        /* 19. 行业资讯/知识库 (最新文章) */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 24px;
        }

        .news-card {
            background-color: var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 24px;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
            transition: var(--transition);
        }

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

        .news-tag {
            font-size: 0.8rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 12px;
            text-transform: uppercase;
        }

        .news-card h3 {
            font-size: 1.15rem;
            margin-bottom: 12px;
            line-height: 1.4;
        }

        .news-card a {
            text-decoration: none;
            color: var(--text-main);
        }

        .news-card a:hover {
            color: var(--primary);
        }

        .news-footer {
            margin-top: 16px;
            font-size: 0.85rem;
            color: var(--text-muted);
            border-top: 1px solid var(--border-color);
            padding-top: 12px;
        }

        /* 客户评论卡片 */
        .reviews-section {
            background-color: var(--bg-light);
        }

        .reviews-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 24px;
        }

        .review-card {
            background-color: var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 24px;
            box-shadow: var(--shadow-sm);
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .review-content {
            font-size: 0.95rem;
            color: var(--text-muted);
            font-style: italic;
            margin-bottom: 16px;
        }

        .review-author {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .author-avatar {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background-color: var(--primary-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
        }

        .author-info h4 {
            font-size: 0.95rem;
            margin-bottom: 2px;
        }

        .author-info p {
            font-size: 0.8rem;
            color: var(--text-muted);
        }

        /* 20 & 21. 联系我们与加盟代理 */
        .contact-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
        }

        .contact-info-panel {
            background-color: var(--bg-white);
            border: 1px solid var(--border-color);
            padding: 30px;
            border-radius: 12px;
            display: flex;
            flex-direction: column;
            gap: 24px;
        }

        .agent-callout {
            background-color: var(--accent-light);
            border: 1px solid rgba(124, 58, 237, 0.2);
            border-radius: 8px;
            padding: 20px;
        }

        .agent-callout h3 {
            color: var(--accent);
            font-size: 1.2rem;
            margin-bottom: 8px;
        }

        .agent-callout p {
            font-size: 0.9rem;
            color: var(--text-muted);
        }

        .contact-channels {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 16px;
        }

        .channel-item {
            border: 1px solid var(--border-color);
            padding: 16px;
            border-radius: 8px;
            text-align: center;
        }

        .channel-item img {
            width: 100px;
            height: 100px;
            object-fit: contain;
            margin-bottom: 8px;
            border-radius: 4px;
        }

        .channel-item p {
            font-size: 0.85rem;
            font-weight: 600;
        }

        .channel-meta {
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-top: 8px;
        }

        /* 表单样式 */
        .contact-form-panel {
            background-color: var(--bg-white);
            border: 1px solid var(--border-color);
            padding: 30px;
            border-radius: 12px;
            box-shadow: var(--shadow-sm);
        }

        .contact-form {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

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

        .form-group label {
            font-size: 0.9rem;
            font-weight: 600;
        }

        .form-input, .form-select, .form-textarea {
            width: 100%;
            padding: 10px 14px;
            border: 1px solid var(--border-color);
            border-radius: 6px;
            font-size: 0.95rem;
            outline: none;
            transition: var(--transition);
        }

        .form-input:focus, .form-select:focus, .form-textarea:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
        }

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

        /* 浮动客服入口 */
        .floating-service {
            position: fixed;
            bottom: 30px;
            right: 30px;
            z-index: 999;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .float-btn {
            width: 50px;
            height: 50px;
            border-radius: 50%;
            background-color: var(--primary);
            color: white;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: var(--shadow-lg);
            cursor: pointer;
            transition: var(--transition);
            text-decoration: none;
            border: none;
            font-size: 1.25rem;
            position: relative;
        }

        .float-btn:hover {
            background-color: var(--primary-hover);
            transform: scale(1.05);
        }

        .float-btn-wechat:hover .wechat-popover {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
        }

        .wechat-popover {
            position: absolute;
            bottom: 60px;
            right: 0;
            background-color: var(--bg-white);
            border: 1px solid var(--border-color);
            padding: 12px;
            border-radius: 8px;
            box-shadow: var(--shadow-lg);
            opacity: 0;
            visibility: hidden;
            transform: translateY(10px);
            transition: var(--transition);
            text-align: center;
            width: 140px;
        }

        .wechat-popover img {
            width: 100%;
            height: auto;
            margin-bottom: 4px;
        }

        .wechat-popover span {
            font-size: 0.75rem;
            color: var(--text-main);
            font-weight: 600;
        }

        /* 页脚与友情链接 */
        footer {
            background-color: #0f172a;
            color: #94a3b8;
            padding: 60px 0 30px 0;
            border-top: 1px solid #1e293b;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 40px;
            margin-bottom: 40px;
        }

        .footer-logo img {
            height: 38px;
            margin-bottom: 16px;
        }

        .footer-desc {
            font-size: 0.9rem;
            line-height: 1.6;
        }

        .footer-links h4 {
            color: white;
            font-size: 1rem;
            margin-bottom: 16px;
        }

        .footer-links ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .footer-links a {
            color: #94a3b8;
            text-decoration: none;
            font-size: 0.9rem;
            transition: var(--transition);
        }

        .footer-links a:hover {
            color: white;
        }

        .friendly-links-section {
            border-top: 1px solid #1e293b;
            padding-top: 24px;
            margin-top: 24px;
        }

        .friendly-links-section h4 {
            color: white;
            font-size: 0.9rem;
            margin-bottom: 12px;
        }

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

        .friendly-links-list a {
            color: #64748b;
            text-decoration: none;
            font-size: 0.85rem;
            transition: var(--transition);
        }

        .friendly-links-list a:hover {
            color: white;
        }

        .copyright-area {
            border-top: 1px solid #1e293b;
            padding-top: 24px;
            margin-top: 24px;
            text-align: center;
            font-size: 0.8rem;
        }

        /* 动画基础 */
        @keyframes pulse {
            0%, 100% { opacity: 1; }
            50% { opacity: 0.8; }
        }

        /* 响应式调整 */
        @media (max-width: 992px) {
            .help-grid, .contact-grid {
                grid-template-columns: 1fr;
            }
        }

        @media (max-width: 768px) {
            .menu-toggle {
                display: block;
            }

            nav ul {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 72px;
                left: 0;
                right: 0;
                background-color: var(--bg-white);
                border-bottom: 1px solid var(--border-color);
                padding: 20px;
                gap: 16px;
                box-shadow: var(--shadow-md);
            }

            nav ul.active {
                display: flex;
            }

            .timeline::after {
                left: 31px;
            }

            .timeline-item {
                width: 100%;
                padding-left: 55px;
                padding-right: 20px;
            }

            .timeline-item::after {
                left: 21px;
            }

            .left {
                text-align: left;
            }

            .left::after {
                left: 21px;
            }

            .right {
                left: 0;
            }
        }