:root {
            --primary: #0D6EFD;
            --primary-hover: #0b5ed7;
            --primary-light: #e7f1ff;
            --secondary: #198754;
            --dark: #212529;
            --light: #f8f9fa;
            --border-color: #dee2e6;
            --text-muted: #6c757d;
            --gradient: linear-gradient(135deg, #0D6EFD 0%, #20C997 100%);
            --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
        }

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

        html {
            scroll-behavior: smooth;
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            color: var(--dark);
            background-color: #ffffff;
            line-height: 1.6;
        }

        body {
            overflow-x: hidden;
        }

        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        /* 顶部导航 */
        header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--border-color);
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
        }

        .nav-wrapper {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 70px;
        }

        .brand {
            display: flex;
            align-items: center;
            gap: 10px;
            text-decoration: none;
        }

        .ai-page-logo {
            height: 40px;
            width: auto;
        }

        .nav-container {
            display: flex;
            align-items: center;
            gap: 20px;
        }

        nav {
            display: flex;
            gap: 15px;
        }

        nav a {
            text-decoration: none;
            color: var(--dark);
            font-size: 14px;
            font-weight: 500;
            padding: 8px 12px;
            border-radius: 6px;
            transition: var(--transition);
        }

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

        .nav-btn {
            background: var(--gradient);
            color: #fff;
            padding: 8px 18px;
            border-radius: 20px;
            text-decoration: none;
            font-size: 14px;
            font-weight: bold;
            transition: var(--transition);
            box-shadow: 0 4px 6px rgba(13, 110, 253, 0.2);
        }

        .nav-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 12px rgba(13, 110, 253, 0.3);
        }

        .menu-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: none;
            border: none;
            cursor: pointer;
        }

        .menu-toggle span {
            display: block;
            width: 25px;
            height: 3px;
            background-color: var(--dark);
            border-radius: 3px;
            transition: var(--transition);
        }

        /* Hero首屏 - 严禁出现任何图片 */
        .hero {
            background: radial-gradient(circle at 80% 20%, rgba(13, 110, 253, 0.08), transparent 50%), 
                        radial-gradient(circle at 20% 80%, rgba(32, 201, 151, 0.08), transparent 50%), 
                        #ffffff;
            padding: 100px 0;
            text-align: center;
            border-bottom: 1px solid var(--border-color);
            position: relative;
            overflow: hidden;
        }

        .hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-image: linear-gradient(rgba(13, 110, 253, 0.03) 1px, transparent 1px),
                              linear-gradient(90deg, rgba(13, 110, 253, 0.03) 1px, transparent 1px);
            background-size: 40px 40px;
            z-index: 1;
        }

        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 800px;
            margin: 0 auto;
        }

        .hero-badge {
            background-color: var(--primary-light);
            color: var(--primary);
            padding: 6px 16px;
            border-radius: 20px;
            font-size: 14px;
            font-weight: bold;
            display: inline-block;
            margin-bottom: 20px;
            animation: pulse 2s infinite;
        }

        @keyframes pulse {
            0% { transform: scale(1); }
            50% { transform: scale(1.05); }
            100% { transform: scale(1); }
        }

        .hero h1 {
            font-size: 40px;
            line-height: 1.3;
            margin-bottom: 20px;
            font-weight: 800;
            background: linear-gradient(135deg, #212529 30%, #0d6efd 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .hero p {
            font-size: 18px;
            color: var(--text-muted);
            margin-bottom: 40px;
            line-height: 1.8;
        }

        .hero-btns {
            display: flex;
            justify-content: center;
            gap: 20px;
            flex-wrap: wrap;
        }

        .btn-primary {
            background: var(--gradient);
            color: #ffffff;
            padding: 14px 32px;
            border-radius: 30px;
            text-decoration: none;
            font-weight: bold;
            font-size: 16px;
            border: none;
            cursor: pointer;
            box-shadow: 0 8px 15px rgba(13, 110, 253, 0.25);
            transition: var(--transition);
        }

        .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 20px rgba(13, 110, 253, 0.35);
        }

        .btn-outline {
            background: #ffffff;
            color: var(--primary);
            border: 2px solid var(--primary);
            padding: 12px 30px;
            border-radius: 30px;
            text-decoration: none;
            font-weight: bold;
            font-size: 16px;
            transition: var(--transition);
        }

        .btn-outline:hover {
            background-color: var(--primary-light);
            transform: translateY(-3px);
        }

        /* 基础样式板块 */
        section {
            padding: 80px 0;
            border-bottom: 1px solid var(--border-color);
        }

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

        .section-title h2 {
            font-size: 32px;
            font-weight: 700;
            margin-bottom: 15px;
            position: relative;
            display: inline-block;
        }

        .section-title h2::after {
            content: '';
            width: 60px;
            height: 4px;
            background: var(--gradient);
            position: absolute;
            bottom: -8px;
            left: 50%;
            transform: translateX(-50%);
            border-radius: 2px;
        }

        .section-title p {
            color: var(--text-muted);
            font-size: 16px;
        }

        /* 3. 数据指标卡片 */
        .metrics-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 20px;
        }

        .metric-card {
            background-color: #ffffff;
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 30px 20px;
            text-align: center;
            transition: var(--transition);
            box-shadow: 0 4px 6px rgba(0,0,0,0.02);
        }

        .metric-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 20px rgba(13, 110, 253, 0.1);
            border-color: var(--primary);
        }

        .metric-number {
            font-size: 36px;
            font-weight: 800;
            color: var(--primary);
            margin-bottom: 5px;
        }

        .metric-label {
            font-size: 15px;
            color: var(--dark);
            font-weight: 600;
            margin-bottom: 10px;
        }

        .metric-desc {
            font-size: 13px;
            color: var(--text-muted);
        }

        /* 4. 关于我们 */
        .about-layout {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
        }

        .about-text h3 {
            font-size: 24px;
            margin-bottom: 20px;
            color: var(--dark);
        }

        .about-text p {
            color: var(--text-muted);
            margin-bottom: 15px;
            line-height: 1.8;
        }

        .about-features {
            list-style: none;
            margin-top: 25px;
        }

        .about-features li {
            position: relative;
            padding-left: 25px;
            margin-bottom: 12px;
            font-weight: 500;
        }

        .about-features li::before {
            content: '✓';
            position: absolute;
            left: 0;
            color: var(--secondary);
            font-weight: bold;
        }

        .about-intro-box {
            background-color: var(--light);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 30px;
        }

        .about-intro-box h4 {
            font-size: 18px;
            margin-bottom: 15px;
            color: var(--primary);
        }

        /* 5. 全平台AIGC服务体系 & 模型支持 */
        .services-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 25px;
            margin-bottom: 40px;
        }

        .service-card {
            background: #ffffff;
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 30px;
            transition: var(--transition);
        }

        .service-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 25px rgba(0,0,0,0.05);
            border-color: var(--primary);
        }

        .service-icon {
            font-size: 32px;
            margin-bottom: 15px;
            display: inline-block;
        }

        .service-card h3 {
            font-size: 20px;
            margin-bottom: 12px;
        }

        .service-card p {
            color: var(--text-muted);
            font-size: 14px;
        }

        .models-container {
            background-color: var(--light);
            border-radius: 12px;
            padding: 30px;
            border: 1px solid var(--border-color);
        }

        .models-container h3 {
            font-size: 18px;
            margin-bottom: 20px;
            text-align: center;
        }

        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            justify-content: center;
        }

        .tag-item {
            background-color: #ffffff;
            border: 1px solid var(--border-color);
            padding: 6px 12px;
            border-radius: 20px;
            font-size: 13px;
            font-weight: 500;
            transition: var(--transition);
        }

        .tag-item:hover {
            border-color: var(--primary);
            color: var(--primary);
            transform: scale(1.05);
        }

        /* 6. 全自动AIGC制作流程 & 标准化服务流程 */
        .timeline {
            position: relative;
            max-width: 800px;
            margin: 0 auto;
            padding: 20px 0;
        }

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

        .timeline-item {
            position: relative;
            margin-bottom: 40px;
            width: 50%;
            padding: 0 40px;
        }

        .timeline-item::after {
            content: '';
            position: absolute;
            top: 5px;
            right: -8px;
            width: 16px;
            height: 16px;
            border-radius: 50%;
            background-color: #ffffff;
            border: 4px solid var(--primary);
            z-index: 1;
        }

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

        .timeline-item.right {
            left: 50%;
        }

        .timeline-item.right::after {
            left: -8px;
        }

        .timeline-content {
            background-color: #ffffff;
            border: 1px solid var(--border-color);
            border-radius: 8px;
            padding: 20px;
            box-shadow: 0 4px 6px rgba(0,0,0,0.02);
        }

        .timeline-content h3 {
            font-size: 18px;
            color: var(--primary);
            margin-bottom: 10px;
        }

        .timeline-content p {
            font-size: 14px;
            color: var(--text-muted);
        }

        /* 7. 全行业解决方案 */
        .solutions-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 25px;
        }

        .solution-card {
            background: #ffffff;
            border: 1px solid var(--border-color);
            border-radius: 12px;
            overflow: hidden;
            transition: var(--transition);
        }

        .solution-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 25px rgba(0,0,0,0.05);
            border-color: var(--primary);
        }

        .solution-header {
            background: var(--light);
            padding: 20px;
            border-bottom: 1px solid var(--border-color);
            font-weight: bold;
            font-size: 18px;
            color: var(--primary);
        }

        .solution-body {
            padding: 25px;
        }

        .solution-body ul {
            list-style: none;
            padding: 0;
        }

        .solution-body li {
            margin-bottom: 10px;
            padding-left: 20px;
            position: relative;
            font-size: 14px;
            color: var(--text-muted);
        }

        .solution-body li::before {
            content: '•';
            position: absolute;
            left: 0;
            color: var(--primary);
            font-weight: bold;
        }

        /* 8. 全国服务网络 */
        .network-wrapper {
            display: grid;
            grid-template-columns: 1fr 1.2fr;
            gap: 40px;
            align-items: center;
        }

        .network-map-sim {
            background: var(--light);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            height: 350px;
            position: relative;
            display: flex;
            align-items: center;
            justify-content: center;
            overflow: hidden;
        }

        .map-point {
            position: absolute;
            width: 10px;
            height: 10px;
            background-color: var(--primary);
            border-radius: 50%;
            animation: ripple 2s infinite;
        }

        @keyframes ripple {
            0% { transform: scale(1); opacity: 1; box-shadow: 0 0 0 0 rgba(13, 110, 253, 0.4); }
            100% { transform: scale(3); opacity: 0; box-shadow: 0 0 0 10px rgba(13, 110, 253, 0); }
        }

        .network-list {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
        }

        .network-item {
            background-color: #ffffff;
            border: 1px solid var(--border-color);
            border-radius: 8px;
            padding: 15px;
        }

        .network-item h4 {
            font-size: 15px;
            color: var(--dark);
            margin-bottom: 5px;
        }

        .network-item p {
            font-size: 13px;
            color: var(--text-muted);
        }

        /* 9. 技术标准 & 软件介绍 */
        .tech-intro-grid {
            display: grid;
            grid-template-columns: 1.2fr 1fr;
            gap: 40px;
        }

        .tech-table {
            width: 100%;
            border-collapse: collapse;
            font-size: 14px;
        }

        .tech-table th, .tech-table td {
            padding: 12px 15px;
            text-align: left;
            border-bottom: 1px solid var(--border-color);
        }

        .tech-table th {
            background-color: var(--light);
            font-weight: 600;
        }

        /* 10. 案例展示与图文素材 */
        .cases-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 25px;
        }

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

        .case-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 25px rgba(0,0,0,0.08);
            border-color: var(--primary);
        }

        .case-img-container {
            width: 100%;
            height: 200px;
            overflow: hidden;
            position: relative;
            background-color: var(--light);
        }

        .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: 20px;
        }

        .case-body h3 {
            font-size: 18px;
            margin-bottom: 10px;
            font-weight: 700;
        }

        .case-body p {
            font-size: 13px;
            color: var(--text-muted);
            margin-bottom: 15px;
        }

        .case-badge {
            background-color: var(--primary-light);
            color: var(--primary);
            padding: 3px 10px;
            font-size: 12px;
            border-radius: 4px;
            font-weight: bold;
        }

        /* 11. 对比评测 - 高对比度 */
        .evaluation-box {
            background: var(--light);
            border: 1px solid var(--border-color);
            border-radius: 16px;
            padding: 40px;
        }

        .evaluation-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 20px;
            margin-bottom: 30px;
            border-bottom: 1px solid var(--border-color);
            padding-bottom: 20px;
        }

        .rating-box {
            display: flex;
            align-items: center;
            gap: 15px;
        }

        .stars {
            color: #ffc107;
            font-size: 24px;
        }

        .score {
            font-size: 32px;
            font-weight: 800;
            color: var(--primary);
        }

        .compare-table-wrapper {
            width: 100%;
            overflow-x: auto;
        }

        .compare-table {
            width: 100%;
            border-collapse: collapse;
            background: #ffffff;
            min-width: 600px;
        }

        .compare-table th, .compare-table td {
            padding: 15px;
            text-align: center;
            border: 1px solid var(--border-color);
            font-size: 14px;
        }

        .compare-table th {
            background-color: var(--light);
            font-weight: bold;
        }

        .compare-table td:first-child {
            text-align: left;
            font-weight: 600;
            background-color: var(--light);
        }

        .compare-highlight {
            background-color: rgba(13, 110, 253, 0.05);
            font-weight: bold;
            color: var(--primary);
        }

        /* 12. Token比价参考 */
        .token-pricing {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 20px;
        }

        .price-card {
            background: #ffffff;
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 25px;
            text-align: center;
            transition: var(--transition);
        }

        .price-card.featured {
            border: 2px solid var(--primary);
            box-shadow: 0 8px 20px rgba(13, 110, 253, 0.1);
            position: relative;
        }

        .price-card.featured::before {
            content: '全网低价';
            position: absolute;
            top: -12px;
            left: 50%;
            transform: translateX(-50%);
            background-color: var(--primary);
            color: #ffffff;
            padding: 2px 12px;
            border-radius: 10px;
            font-size: 11px;
            font-weight: bold;
        }

        .price-card h3 {
            font-size: 18px;
            margin-bottom: 15px;
        }

        .price-num {
            font-size: 28px;
            font-weight: 800;
            color: var(--dark);
            margin-bottom: 5px;
        }

        .price-unit {
            font-size: 12px;
            color: var(--text-muted);
            margin-bottom: 20px;
        }

        .price-list {
            list-style: none;
            padding: 0;
            margin-bottom: 25px;
            text-align: left;
            font-size: 13px;
        }

        .price-list li {
            padding: 6px 0;
            border-bottom: 1px dashed var(--border-color);
            display: flex;
            justify-content: space-between;
        }

        /* 13. 职业技术培训 & 人工智能培训 */
        .training-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 25px;
        }

        .training-card {
            background: #ffffff;
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 30px;
            transition: var(--transition);
        }

        .training-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 25px rgba(0,0,0,0.05);
            border-color: var(--secondary);
        }

        .training-card h3 {
            font-size: 20px;
            margin-bottom: 12px;
            color: var(--dark);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .training-card h3::before {
            content: '■';
            color: var(--secondary);
        }

        .training-card p {
            font-size: 14px;
            color: var(--text-muted);
            margin-bottom: 20px;
        }

        .training-badge {
            background-color: var(--light);
            border: 1px solid var(--border-color);
            padding: 4px 10px;
            font-size: 12px;
            border-radius: 4px;
            margin-right: 5px;
            display: inline-block;
        }

        /* 14. 客户评论卡片 */
        .comments-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 25px;
        }

        .comment-card {
            background: #ffffff;
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 25px;
            box-shadow: 0 4px 6px rgba(0,0,0,0.02);
            transition: var(--transition);
        }

        .comment-card:hover {
            transform: translateY(-3px);
            box-shadow: 0 8px 15px rgba(0,0,0,0.05);
        }

        .comment-user {
            display: flex;
            align-items: center;
            gap: 15px;
            margin-bottom: 15px;
        }

        .user-avatar-sim {
            width: 45px;
            height: 45px;
            background-color: var(--primary-light);
            color: var(--primary);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: bold;
            font-size: 18px;
        }

        .user-info h4 {
            font-size: 14px;
            margin-bottom: 2px;
        }

        .user-info p {
            font-size: 12px;
            color: var(--text-muted);
        }

        .comment-text {
            font-size: 14px;
            color: var(--dark);
            line-height: 1.6;
        }

        /* 15. FAQ & 常见问题自助排查 */
        .faq-wrapper {
            max-width: 800px;
            margin: 0 auto;
        }

        .faq-item {
            background-color: #ffffff;
            border: 1px solid var(--border-color);
            border-radius: 8px;
            margin-bottom: 15px;
            overflow: hidden;
            transition: var(--transition);
        }

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

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

        .faq-answer {
            padding: 0 20px;
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease-out, padding 0.3s ease-out;
            border-top: 0px solid var(--border-color);
            font-size: 14px;
            color: var(--text-muted);
            background-color: var(--light);
        }

        .faq-item.active .faq-answer {
            padding: 20px;
            max-height: 500px;
            border-top: 1px solid var(--border-color);
        }

        .faq-icon {
            font-size: 18px;
            transition: transform 0.3s;
        }

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

        /* 16. 网站术语百科 */
        .glossary-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 20px;
        }

        .glossary-card {
            background-color: var(--light);
            border: 1px solid var(--border-color);
            border-radius: 8px;
            padding: 20px;
        }

        .glossary-card h3 {
            font-size: 16px;
            margin-bottom: 8px;
            color: var(--primary);
        }

        .glossary-card p {
            font-size: 13px;
            color: var(--text-muted);
        }

        /* 17. 行业资讯 / 知识库 */
        .articles-list {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 20px;
        }

        .article-card {
            background-color: #ffffff;
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 25px;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
            transition: var(--transition);
        }

        .article-card:hover {
            transform: translateY(-3px);
            border-color: var(--primary);
        }

        .article-card h3 {
            font-size: 16px;
            margin-bottom: 15px;
            line-height: 1.5;
        }

        .article-card a {
            color: var(--primary);
            text-decoration: none;
            font-size: 14px;
            font-weight: bold;
            display: inline-flex;
            align-items: center;
            gap: 5px;
            transition: var(--transition);
        }

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

        /* 18. 智能需求匹配 - 表单提交 */
        .form-wrapper {
            max-width: 700px;
            margin: 0 auto;
            background-color: #ffffff;
            border: 1px solid var(--border-color);
            border-radius: 16px;
            padding: 40px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.03);
        }

        .form-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
            margin-bottom: 20px;
        }

        .form-group {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

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

        .form-group label {
            font-size: 14px;
            font-weight: 600;
        }

        .form-control {
            border: 1px solid var(--border-color);
            border-radius: 8px;
            padding: 10px 14px;
            font-size: 14px;
            transition: var(--transition);
            outline: none;
        }

        .form-control:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(13, 110, 253, 0.15);
        }

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

        /* 19. 联系我们 & 页脚 */
        footer {
            background-color: var(--dark);
            color: #ffffff;
            padding: 60px 0 20px 0;
            border-top: 1px solid #2d3238;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }

        .footer-info h3 {
            font-size: 18px;
            margin-bottom: 20px;
            font-weight: 700;
        }

        .footer-info p {
            font-size: 14px;
            color: #a1a8b0;
            margin-bottom: 12px;
        }

        .footer-links h4 {
            font-size: 15px;
            margin-bottom: 20px;
            font-weight: bold;
            color: #ffffff;
        }

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

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

        .footer-links ul li a {
            color: #a1a8b0;
            text-decoration: none;
            font-size: 13px;
            transition: var(--transition);
        }

        .footer-links ul li a:hover {
            color: #ffffff;
            padding-left: 5px;
        }

        .qr-box {
            display: flex;
            align-items: center;
            gap: 15px;
            background-color: rgba(255,255,255,0.05);
            padding: 15px;
            border-radius: 8px;
            margin-top: 15px;
        }

        .qr-box img {
            width: 80px;
            height: 80px;
            background-color: #fff;
            border-radius: 4px;
            padding: 3px;
        }

        .qr-text {
            font-size: 12px;
            color: #a1a8b0;
            line-height: 1.5;
        }

        .footer-bottom {
            border-top: 1px solid #2d3238;
            padding-top: 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 15px;
            font-size: 12px;
            color: #a1a8b0;
        }

        .footer-bottom-links a {
            color: #a1a8b0;
            text-decoration: none;
            margin-left: 15px;
            transition: var(--transition);
        }

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

        .friend-links {
            margin-top: 20px;
            padding-top: 20px;
            border-top: 1px dashed #2d3238;
            font-size: 12px;
            color: #a1a8b0;
        }

        .friend-links a {
            color: #a1a8b0;
            text-decoration: none;
            margin-right: 15px;
            display: inline-block;
        }

        .friend-links a:hover {
            color: #ffffff;
        }

        /* 悬浮客服 */
        .floating-service {
            position: fixed;
            right: 20px;
            bottom: 20px;
            z-index: 999;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .float-btn {
            width: 50px;
            height: 50px;
            border-radius: 50%;
            background-color: #ffffff;
            border: 1px solid var(--border-color);
            box-shadow: 0 4px 15px rgba(0,0,0,0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            position: relative;
            transition: var(--transition);
            text-decoration: none;
        }

        .float-btn:hover {
            background-color: var(--primary);
            color: #ffffff;
            transform: translateY(-3px);
        }

        .float-btn svg {
            width: 24px;
            height: 24px;
            fill: currentColor;
        }

        .qr-popover {
            position: absolute;
            bottom: 60px;
            right: 0;
            background-color: #ffffff;
            border: 1px solid var(--border-color);
            border-radius: 8px;
            padding: 15px;
            box-shadow: 0 5px 25px rgba(0,0,0,0.15);
            display: none;
            flex-direction: column;
            align-items: center;
            width: 140px;
        }

        .qr-popover img {
            width: 110px;
            height: 110px;
            margin-bottom: 5px;
        }

        .qr-popover span {
            font-size: 11px;
            color: var(--dark);
            font-weight: bold;
        }

        .float-btn:hover .qr-popover {
            display: flex;
        }

        /* 响应式适配 */
        @media (max-width: 992px) {
            .about-layout, .tech-intro-grid, .network-wrapper {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 768px) {
            .menu-toggle {
                display: flex;
            }
            nav {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 70px;
                left: 0;
                right: 0;
                background-color: #ffffff;
                border-bottom: 1px solid var(--border-color);
                padding: 20px;
                box-shadow: 0 4px 6px rgba(0,0,0,0.05);
            }
            nav.active {
                display: flex;
            }
            .timeline::before {
                left: 20px;
            }
            .timeline-item {
                width: 100%;
                padding-left: 45px;
                padding-right: 0;
                text-align: left !important;
            }
            .timeline-item::after {
                left: 12px;
            }
            .timeline-item.right {
                left: 0;
            }
            .form-grid {
                grid-template-columns: 1fr;
            }
            .form-group.full-width {
                grid-column: span 1;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
            .hero h1 {
                font-size: 28px;
            }
        }