:root {
            --primary: #2563eb;
            --primary-light: #eff6ff;
            --secondary: #7c3aed;
            --secondary-light: #f5f3ff;
            --accent: #06b6d4;
            --dark: #0f172a;
            --light: #ffffff;
            --gray-50: #f8fafc;
            --gray-100: #f1f5f9;
            --gray-200: #e2e8f0;
            --gray-600: #475569;
            --gray-800: #1e293b;
            --success: #10b981;
            --transition: all 0.3s ease;
        }

        * {
            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: var(--light);
        }

        body {
            line-height: 1.6;
            overflow-x: hidden;
        }

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

        /* 头部与导航 */
        header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: 70px;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(8px);
            box-shadow: 0 1px 10px rgba(0,0,0,0.05);
            z-index: 1000;
            display: flex;
            align-items: center;
        }

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

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

        .logo-wrap img {
            height: 40px;
        }

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

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

        .nav-links {
            display: flex;
            list-style: none;
            gap: 20px;
        }

        .nav-links a {
            text-decoration: none;
            color: var(--gray-600);
            font-size: 0.9rem;
            font-weight: 500;
            transition: var(--transition);
        }

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

        .nav-btn {
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: white;
            padding: 8px 20px;
            border-radius: 50px;
            text-decoration: none;
            font-size: 0.9rem;
            font-weight: 600;
            box-shadow: 0 4px 15px rgba(37, 99, 235, 0.2);
            transition: var(--transition);
        }

        .nav-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(37, 99, 235, 0.3);
        }

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

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

        /* 英雄首屏 (1. 首页) - 禁止使用图片 */
        .hero {
            padding-top: 140px;
            padding-bottom: 80px;
            background: radial-gradient(circle at 80% 20%, rgba(124, 58, 237, 0.08) 0%, transparent 50%),
                        radial-gradient(circle at 20% 80%, rgba(37, 99, 235, 0.08) 0%, transparent 50%),
                        var(--gray-50);
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: linear-gradient(0deg, rgba(255,255,255,1) 0%, rgba(255,255,255,0) 100%);
            pointer-events: none;
        }

        .hero-tag {
            display: inline-block;
            padding: 6px 16px;
            border-radius: 50px;
            background-color: var(--primary-light);
            color: var(--primary);
            font-weight: 600;
            font-size: 0.85rem;
            margin-bottom: 24px;
            border: 1px solid rgba(37, 99, 235, 0.15);
            animation: pulse 2s infinite;
        }

        @keyframes pulse {
            0% { transform: scale(1); }
            50% { transform: scale(1.03); }
            100% { transform: scale(1); }
        }

        .hero h1 {
            font-size: 3rem;
            line-height: 1.2;
            font-weight: 900;
            letter-spacing: -0.02em;
            margin-bottom: 24px;
            background: linear-gradient(135deg, var(--dark) 30%, var(--secondary) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .hero p.lead {
            font-size: 1.25rem;
            color: var(--gray-600);
            max-width: 700px;
            margin: 0 auto 40px auto;
        }

        .hero-btns {
            display: flex;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
            margin-bottom: 60px;
        }

        .btn-main {
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: white;
            padding: 14px 32px;
            border-radius: 8px;
            font-weight: 700;
            text-decoration: none;
            box-shadow: 0 10px 25px rgba(124, 58, 237, 0.25);
            transition: var(--transition);
        }

        .btn-main:hover {
            transform: translateY(-2px);
            box-shadow: 0 12px 30px rgba(124, 58, 237, 0.35);
        }

        .btn-sub {
            background-color: white;
            color: var(--dark);
            border: 1px solid var(--gray-200);
            padding: 14px 32px;
            border-radius: 8px;
            font-weight: 600;
            text-decoration: none;
            transition: var(--transition);
        }

        .btn-sub:hover {
            background-color: var(--gray-50);
            border-color: var(--gray-600);
        }

        /* 核心指标卡片 */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            margin-top: 40px;
        }

        .stat-card {
            background: white;
            padding: 24px;
            border-radius: 12px;
            box-shadow: 0 4px 20px rgba(0,0,0,0.03);
            border: 1px solid var(--gray-100);
            text-align: center;
            transition: var(--transition);
        }

        .stat-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 25px rgba(0,0,0,0.06);
        }

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

        .stat-card .label {
            font-size: 0.9rem;
            color: var(--gray-600);
        }

        /* 公共板块样式 */
        section {
            padding: 80px 0;
        }

        section.bg-alt {
            background-color: var(--gray-50);
        }

        .section-header {
            text-align: center;
            max-width: 700px;
            margin: 0 auto 50px auto;
        }

        .section-header h2 {
            font-size: 2.25rem;
            font-weight: 800;
            margin-bottom: 16px;
            position: relative;
            display: inline-block;
        }

        .section-header p {
            color: var(--gray-600);
            font-size: 1.1rem;
        }

        /* 2. 关于我们 & 平台介绍 */
        .about-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
            align-items: center;
        }

        .about-content h3 {
            font-size: 1.75rem;
            font-weight: 700;
            margin-bottom: 20px;
            color: var(--dark);
        }

        .about-content p {
            color: var(--gray-600);
            margin-bottom: 20px;
        }

        .feature-bullets {
            list-style: none;
        }

        .feature-bullets li {
            position: relative;
            padding-left: 28px;
            margin-bottom: 12px;
            font-weight: 500;
        }

        .feature-bullets li::before {
            content: "✓";
            position: absolute;
            left: 0;
            color: var(--success);
            font-weight: 900;
            font-size: 1.2rem;
            top: -2px;
        }

        .about-visual {
            background: linear-gradient(135deg, var(--primary-light), var(--secondary-light));
            border-radius: 20px;
            padding: 40px;
            border: 1px dashed var(--primary);
            position: relative;
        }

        .visual-box {
            background: white;
            border-radius: 12px;
            padding: 20px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.05);
            margin-bottom: 20px;
        }

        .visual-box:last-child {
            margin-bottom: 0;
            margin-left: 30px;
        }

        .visual-box h4 {
            color: var(--primary);
            margin-bottom: 8px;
        }

        /* 3. 全平台AIGC服务 - 模型墙 */
        .model-cloud {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 12px;
            margin-top: 30px;
        }

        .model-tag {
            background-color: white;
            border: 1px solid var(--gray-200);
            padding: 8px 18px;
            border-radius: 50px;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--gray-800);
            box-shadow: 0 2px 5px rgba(0,0,0,0.02);
            transition: var(--transition);
        }

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

        /* 4. 一站式AIGC制作 & 5. 解决方案 */
        .services-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }

        .service-card {
            background: white;
            border: 1px solid var(--gray-100);
            border-radius: 16px;
            padding: 30px;
            box-shadow: 0 4px 15px rgba(0,0,0,0.02);
            transition: var(--transition);
        }

        .service-card:hover {
            transform: translateY(-8px);
            box-shadow: 0 12px 30px rgba(0,0,0,0.07);
            border-color: var(--secondary-light);
        }

        .service-icon {
            width: 50px;
            height: 50px;
            border-radius: 12px;
            background: var(--primary-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            margin-bottom: 20px;
            font-weight: bold;
        }

        .service-card h3 {
            font-size: 1.25rem;
            margin-bottom: 12px;
            font-weight: 700;
        }

        .service-card p {
            color: var(--gray-600);
            font-size: 0.95rem;
        }

        /* 6. 全国服务网络 */
        .network-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
        }

        .network-list {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
        }

        .network-item {
            background: white;
            padding: 20px;
            border-radius: 10px;
            border-left: 4px solid var(--primary);
            box-shadow: 0 2px 10px rgba(0,0,0,0.02);
        }

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

        .network-item p {
            font-size: 0.85rem;
            color: var(--gray-600);
        }

        /* 7. 标准化AIGC流程 */
        .process-flow {
            display: flex;
            justify-content: space-between;
            position: relative;
            flex-wrap: wrap;
            gap: 20px;
        }

        .process-flow::before {
            content: '';
            position: absolute;
            top: 40px;
            left: 50px;
            right: 50px;
            height: 2px;
            background-color: var(--gray-200);
            z-index: 1;
        }

        .process-step {
            flex: 1;
            min-width: 200px;
            background: white;
            padding: 24px;
            border-radius: 12px;
            text-align: center;
            position: relative;
            z-index: 2;
            border: 1px solid var(--gray-200);
        }

        .step-num {
            width: 40px;
            height: 40px;
            background: var(--primary);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 15px auto;
            font-weight: 700;
        }

        .process-step h4 {
            margin-bottom: 8px;
        }

        .process-step p {
            font-size: 0.85rem;
            color: var(--gray-600);
        }

        /* 8. 技术标准 */
        .standards-container {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .standard-box {
            background-color: white;
            padding: 30px;
            border-radius: 12px;
            border-top: 5px solid var(--accent);
            box-shadow: 0 4px 15px rgba(0,0,0,0.02);
        }

        /* 9. 客户案例中心 */
        .cases-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }

        .case-card {
            background: white;
            border-radius: 16px;
            overflow: hidden;
            box-shadow: 0 4px 20px rgba(0,0,0,0.03);
            border: 1px solid var(--gray-100);
            transition: var(--transition);
        }

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

        .case-img-wrap {
            position: relative;
            overflow: hidden;
            background-color: var(--gray-100);
        }

        .case-img-wrap img {
            width: 100%;
            height: 220px;
            object-fit: cover;
            display: block;
            transition: var(--transition);
        }

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

        .case-content {
            padding: 24px;
        }

        .case-tag {
            font-size: 0.75rem;
            background-color: var(--secondary-light);
            color: var(--secondary);
            padding: 4px 10px;
            border-radius: 4px;
            font-weight: 600;
            display: inline-block;
            margin-bottom: 12px;
        }

        .case-content h3 {
            font-size: 1.15rem;
            margin-bottom: 10px;
            color: var(--dark);
        }

        .case-content p {
            font-size: 0.9rem;
            color: var(--gray-600);
        }

        /* 10. 对比评测 */
        .comparison-table-wrap {
            overflow-x: auto;
            background: white;
            border-radius: 16px;
            box-shadow: 0 4px 25px rgba(0,0,0,0.04);
            border: 1px solid var(--gray-200);
        }

        .comparison-table {
            width: 100%;
            border-collapse: collapse;
            text-align: left;
            min-width: 800px;
        }

        .comparison-table th, .comparison-table td {
            padding: 18px 24px;
            border-bottom: 1px solid var(--gray-100);
        }

        .comparison-table th {
            background-color: var(--gray-50);
            font-weight: 700;
            color: var(--dark);
        }

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

        .comparison-table td.highlight {
            background-color: rgba(37, 99, 235, 0.02);
            font-weight: 600;
            color: var(--primary);
        }

        .rating-box {
            display: flex;
            align-items: center;
            gap: 15px;
            margin-bottom: 30px;
            background: linear-gradient(135deg, var(--primary-light), var(--secondary-light));
            padding: 20px;
            border-radius: 12px;
            border: 1px solid rgba(124, 58, 237, 0.1);
        }

        .rating-stars {
            color: #fbbf24;
            font-size: 1.5rem;
        }

        .rating-score {
            font-size: 1.25rem;
            font-weight: 800;
            color: var(--dark);
        }

        .rating-score span {
            color: var(--primary);
            font-size: 1.75rem;
        }

        /* 11. 智能需求匹配 & 20. 联系我们 (表单) */
        .form-section-grid {
            display: grid;
            grid-template-columns: 1fr 1.2fr;
            gap: 50px;
        }

        .form-info h3 {
            font-size: 1.75rem;
            margin-bottom: 15px;
        }

        .form-info p {
            color: var(--gray-600);
            margin-bottom: 30px;
        }

        .contact-methods {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        .method-card {
            display: flex;
            align-items: center;
            gap: 15px;
            background: white;
            padding: 16px;
            border-radius: 10px;
            border: 1px solid var(--gray-200);
        }

        .method-icon {
            font-size: 1.5rem;
            color: var(--primary);
        }

        .match-form {
            background: white;
            padding: 40px;
            border-radius: 16px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.05);
            border: 1px solid var(--gray-100);
        }

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

        .form-group label {
            display: block;
            margin-bottom: 8px;
            font-weight: 600;
            font-size: 0.9rem;
        }

        .form-group input, .form-group select, .form-group textarea {
            width: 100%;
            padding: 12px 16px;
            border: 1px solid var(--gray-200);
            border-radius: 8px;
            font-family: inherit;
            font-size: 0.95rem;
            transition: var(--transition);
        }

        .form-group input:focus, .form-group select:focus, .form-group textarea:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
        }

        .submit-btn {
            width: 100%;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: white;
            border: none;
            padding: 14px;
            border-radius: 8px;
            font-weight: 700;
            font-size: 1rem;
            cursor: pointer;
            box-shadow: 0 5px 15px rgba(37, 99, 235, 0.2);
            transition: var(--transition);
        }

        .submit-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(37, 99, 235, 0.3);
        }

        /* 12. Token 比价参考 */
        .price-badge {
            background-color: var(--success);
            color: white;
            font-size: 0.75rem;
            padding: 2px 8px;
            border-radius: 4px;
            font-weight: bold;
        }

        /* 13. 职业技术培训 & 14. 人工智能培训 */
        .training-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .course-card {
            background: white;
            border: 1px solid var(--gray-200);
            border-radius: 12px;
            padding: 24px;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .course-badge {
            align-self: flex-start;
            background-color: var(--primary-light);
            color: var(--primary);
            font-size: 0.8rem;
            font-weight: 700;
            padding: 4px 10px;
            border-radius: 4px;
            margin-bottom: 16px;
        }

        .course-card h4 {
            font-size: 1.15rem;
            margin-bottom: 10px;
        }

        .course-card p {
            font-size: 0.9rem;
            color: var(--gray-600);
            margin-bottom: 20px;
        }

        .course-meta {
            font-size: 0.8rem;
            color: var(--gray-800);
            border-top: 1px solid var(--gray-100);
            padding-top: 12px;
            font-weight: 500;
        }

        /* 15. 帮助中心 / 17. 自助排查 / 18. 术语百科 */
        .help-tabs {
            display: flex;
            justify-content: center;
            gap: 15px;
            margin-bottom: 30px;
        }

        .tab-btn {
            background-color: var(--gray-100);
            border: none;
            padding: 10px 24px;
            border-radius: 50px;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
        }

        .tab-btn.active, .tab-btn:hover {
            background-color: var(--primary);
            color: white;
        }

        .tab-pane {
            display: none;
        }

        .tab-pane.active {
            display: block;
        }

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

        .help-card {
            background: white;
            padding: 24px;
            border-radius: 12px;
            border: 1px solid var(--gray-100);
            box-shadow: 0 4px 15px rgba(0,0,0,0.01);
        }

        /* 16. FAQ 折叠面板 */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
        }

        .faq-item {
            background: white;
            border: 1px solid var(--gray-200);
            border-radius: 8px;
            margin-bottom: 12px;
            overflow: hidden;
            transition: var(--transition);
        }

        .faq-question {
            width: 100%;
            padding: 18px 24px;
            text-align: left;
            background: none;
            border: none;
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--dark);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .faq-question::after {
            content: "+";
            font-size: 1.5rem;
            font-weight: 300;
            color: var(--primary);
            transition: var(--transition);
        }

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

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease;
            background-color: var(--gray-50);
        }

        .faq-answer-inner {
            padding: 20px 24px;
            color: var(--gray-600);
            font-size: 0.95rem;
            border-top: 1px solid var(--gray-100);
        }

        /* 评论组件 */
        .comments-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .comment-card {
            background: white;
            padding: 24px;
            border-radius: 12px;
            border: 1px solid var(--gray-100);
            box-shadow: 0 4px 15px rgba(0,0,0,0.02);
            position: relative;
        }

        .comment-text {
            font-size: 0.95rem;
            color: var(--gray-600);
            margin-bottom: 20px;
            font-style: italic;
        }

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

        .user-avatar {
            width: 40px;
            height: 40px;
            background: var(--primary-light);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            color: var(--primary);
        }

        .user-info h4 {
            font-size: 0.9rem;
            margin-bottom: 2px;
        }

        .user-info p {
            font-size: 0.8rem;
            color: var(--gray-600);
        }

        /* 19. 行业资讯 / 知识库 */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 30px;
        }

        .news-card {
            background: white;
            border-radius: 12px;
            padding: 24px;
            border: 1px solid var(--gray-200);
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .news-card h3 {
            font-size: 1.2rem;
            margin-bottom: 12px;
        }

        .news-card p {
            color: var(--gray-600);
            font-size: 0.9rem;
            margin-bottom: 20px;
        }

        .news-link {
            text-decoration: none;
            color: var(--primary);
            font-weight: 600;
            font-size: 0.9rem;
            display: flex;
            align-items: center;
            gap: 5px;
        }

        .news-link:hover {
            color: var(--secondary);
        }

        /* 21. 加盟代理 */
        .agent-container {
            background: linear-gradient(135deg, var(--dark), var(--gray-800));
            color: white;
            border-radius: 20px;
            padding: 50px;
            text-align: center;
        }

        .agent-container h3 {
            font-size: 2rem;
            margin-bottom: 16px;
        }

        .agent-container p {
            color: var(--gray-200);
            max-width: 600px;
            margin: 0 auto 30px auto;
        }

        /* 页脚 */
        footer {
            background-color: var(--dark);
            color: var(--gray-200);
            padding: 60px 0 30px 0;
            font-size: 0.9rem;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 40px;
            margin-bottom: 40px;
        }

        .footer-col h4 {
            color: white;
            margin-bottom: 20px;
            font-size: 1rem;
            font-weight: 700;
        }

        .footer-links {
            list-style: none;
        }

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

        .footer-links a {
            color: var(--gray-200);
            text-decoration: none;
            transition: var(--transition);
        }

        .footer-links a:hover {
            color: var(--primary);
        }

        .qrcode-wrap {
            display: flex;
            gap: 15px;
            align-items: center;
        }

        .qrcode-wrap img {
            width: 80px;
            height: 80px;
            border-radius: 8px;
            background: white;
            padding: 4px;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.1);
            padding-top: 30px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 20px;
        }

        .friendly-links {
            display: flex;
            gap: 15px;
            flex-wrap: wrap;
        }

        .friendly-links a {
            color: var(--gray-600);
            text-decoration: none;
        }

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

        /* 浮动客服 */
        .floating-contact {
            position: fixed;
            bottom: 30px;
            right: 30px;
            z-index: 999;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .float-btn {
            width: 50px;
            height: 50px;
            border-radius: 50%;
            background: white;
            box-shadow: 0 4px 15px rgba(0,0,0,0.15);
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: var(--transition);
            border: 1px solid var(--gray-200);
            position: relative;
        }

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

        .float-btn .tooltip {
            position: absolute;
            right: 60px;
            background: var(--dark);
            color: white;
            padding: 8px 12px;
            border-radius: 6px;
            font-size: 0.8rem;
            white-space: nowrap;
            opacity: 0;
            pointer-events: none;
            transition: var(--transition);
        }

        .float-btn:hover .tooltip {
            opacity: 1;
        }

        .float-btn img {
            width: 24px;
            height: 24px;
        }

        .qr-popover {
            position: absolute;
            bottom: 60px;
            right: 0;
            background: white;
            padding: 15px;
            border-radius: 12px;
            box-shadow: 0 10px 25px rgba(0,0,0,0.15);
            display: none;
            text-align: center;
            border: 1px solid var(--gray-200);
        }

        .qr-popover img {
            width: 120px;
            height: 120px;
        }

        .qr-popover p {
            margin-top: 8px;
            font-size: 0.75rem;
            color: var(--dark);
        }

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

        /* 响应式样式适配 */
        @media (max-width: 1024px) {
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .services-grid, .cases-grid, .standards-container, .training-grid, .grid-3, .comments-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .about-grid, .network-grid, .form-section-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            .nav-links {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 70px;
                left: 0;
                right: 0;
                background: white;
                padding: 20px;
                border-top: 1px solid var(--gray-200);
                box-shadow: 0 10px 15px rgba(0,0,0,0.05);
            }
            .nav-links.active {
                display: flex;
            }
            .menu-toggle {
                display: flex;
            }
            .hero h1 {
                font-size: 2.25rem;
            }
            .stats-grid, .services-grid, .cases-grid, .standards-container, .training-grid, .grid-3, .comments-grid {
                grid-template-columns: 1fr;
            }
            .process-flow::before {
                display: none;
            }
            .process-step {
                min-width: 100%;
            }
            .news-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
        }