:root {
            --primary: #10B981; /* 鲜绿 */
            --primary-hover: #059669;
            --primary-light: #ECFDF5;
            --dark: #111827;
            --text: #374151;
            --text-muted: #6B7280;
            --light: #F9FAFB;
            --white: #FFFFFF;
            --border: #E5E7EB;
            --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
            --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.05), 0 4px 6px -2px rgba(0, 0, 0, 0.03);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            color: var(--text);
            background-color: var(--light);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition);
        }

        /* 布局容器 */
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* 顶部导航 */
        header {
            background-color: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(8px);
            border-bottom: 1px solid var(--border);
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 1px 3px rgba(0,0,0,0.02);
        }

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

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

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

        .brand-name {
            font-size: 1.25rem;
            font-weight: 800;
            color: var(--dark);
            letter-spacing: 0.5px;
        }

        .brand-name span {
            color: var(--primary);
        }

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

        .nav-link {
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text);
            padding: 6px 12px;
            border-radius: 6px;
        }

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

        .nav-btn {
            background-color: var(--primary);
            color: var(--white) !important;
            padding: 8px 18px;
            border-radius: 8px;
            font-size: 0.9rem;
            font-weight: 600;
        }

        .nav-btn:hover {
            background-color: var(--primary-hover);
        }

        /* 移动端菜单按钮 */
        .menu-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            cursor: pointer;
            color: var(--dark);
        }

        /* Hero 首屏 (绝对无图片，纯色/渐变/几何) */
        .hero {
            background: radial-gradient(circle at top right, #EBFDF4 0%, #FFFFFF 70%);
            padding: 120px 0 90px;
            text-align: center;
        }

        .hero-inner {
            max-width: 900px;
            margin: 0 auto;
        }

        .badge-promo {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background-color: var(--primary-light);
            color: var(--primary-hover);
            padding: 6px 16px;
            border-radius: 50px;
            font-size: 0.85rem;
            font-weight: 600;
            margin-bottom: 24px;
            border: 1px solid rgba(16, 185, 129, 0.2);
            animation: pulse 2s infinite;
        }

        @keyframes pulse {
            0% { transform: scale(1); }
            50% { transform: scale(1.02); }
            100% { transform: scale(1); }
        }

        h1 {
            font-size: 3rem;
            font-weight: 800;
            color: var(--dark);
            line-height: 1.25;
            letter-spacing: -0.5px;
            margin-bottom: 24px;
        }

        h1 span {
            color: var(--primary);
            background: linear-gradient(135deg, #10B981, #059669);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .hero p {
            font-size: 1.15rem;
            color: var(--text-muted);
            margin-bottom: 40px;
            max-width: 700px;
            margin-left: auto;
            margin-right: auto;
        }

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

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 14px 28px;
            border-radius: 8px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
        }

        .btn-primary {
            background-color: var(--primary);
            color: var(--white);
            border: 1px solid var(--primary);
            box-shadow: 0 4px 14px rgba(16, 185, 129, 0.3);
        }

        .btn-primary:hover {
            background-color: var(--primary-hover);
            border-color: var(--primary-hover);
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(16, 185, 129, 0.4);
        }

        .btn-secondary {
            background-color: var(--white);
            color: var(--text);
            border: 1px solid var(--border);
        }

        .btn-secondary:hover {
            border-color: var(--primary);
            color: var(--primary);
            transform: translateY(-2px);
        }

        /* 数据指标 */
        .stats-bar {
            background-color: var(--white);
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
            padding: 30px 0;
            margin-top: -30px;
            position: relative;
            z-index: 10;
            box-shadow: var(--shadow);
            border-radius: 12px;
        }

        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            text-align: center;
        }

        .stat-item h3 {
            font-size: 2.25rem;
            font-weight: 800;
            color: var(--primary);
            margin-bottom: 4px;
        }

        .stat-item p {
            font-size: 0.9rem;
            color: var(--text-muted);
            font-weight: 500;
        }

        /* 关于我们与软件介绍 */
        .section {
            padding: 80px 0;
        }

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

        .section-subtitle {
            color: var(--primary);
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 1.5px;
            font-size: 0.85rem;
            margin-bottom: 12px;
            display: block;
        }

        .section-title {
            font-size: 2rem;
            font-weight: 800;
            color: var(--dark);
            margin-bottom: 16px;
        }

        .section-desc {
            color: var(--text-muted);
            font-size: 1rem;
        }

        .grid-2 {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 40px;
            align-items: center;
        }

        .about-text h4 {
            font-size: 1.25rem;
            color: var(--dark);
            margin-bottom: 12px;
            font-weight: 700;
        }

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

        .feature-bullets {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 16px;
            margin-top: 24px;
        }

        .bullet-item {
            display: flex;
            align-items: center;
            gap: 8px;
            font-weight: 500;
            font-size: 0.95rem;
            color: var(--dark);
        }

        .bullet-item svg {
            color: var(--primary);
            flex-shrink: 0;
        }

        /* 平台服务体系 - 模型云 */
        .services-section {
            background-color: var(--white);
        }

        .grid-3 {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }

        .service-card {
            border: 1px solid var(--border);
            border-radius: 12px;
            padding: 30px;
            background-color: var(--white);
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }

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

        .card-icon {
            width: 48px;
            height: 48px;
            border-radius: 8px;
            background-color: var(--primary-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 20px;
            font-weight: bold;
        }

        .service-card h3 {
            font-size: 1.25rem;
            color: var(--dark);
            margin-bottom: 12px;
            font-weight: 700;
        }

        .service-card p {
            color: var(--text-muted);
            font-size: 0.9rem;
            line-height: 1.5;
        }

        /* 标签云模型展示 */
        .tag-cloud-wrapper {
            margin-top: 40px;
            padding: 24px;
            background-color: var(--light);
            border-radius: 12px;
            border: 1px solid var(--border);
            text-align: center;
        }

        .tag-cloud-wrapper h4 {
            font-size: 1rem;
            color: var(--dark);
            margin-bottom: 16px;
            font-weight: 700;
        }

        .tags-container {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            justify-content: center;
        }

        .tag-item {
            background-color: var(--white);
            border: 1px solid var(--border);
            padding: 6px 12px;
            border-radius: 6px;
            font-size: 0.85rem;
            color: var(--text);
            font-weight: 500;
            transition: var(--transition);
        }

        .tag-item:hover {
            border-color: var(--primary);
            color: var(--primary);
            background-color: var(--primary-light);
        }

        /* 全自动制作流程 & 玩法 */
        .workflow-timeline {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            position: relative;
            margin-top: 40px;
        }

        .workflow-step {
            background-color: var(--white);
            border: 1px solid var(--border);
            border-radius: 12px;
            padding: 24px;
            text-align: center;
            position: relative;
        }

        .step-num {
            width: 32px;
            height: 32px;
            border-radius: 50%;
            background-color: var(--primary);
            color: var(--white);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: bold;
            margin: 0 auto 16px;
        }

        .workflow-step h4 {
            font-size: 1.1rem;
            color: var(--dark);
            margin-bottom: 8px;
        }

        .workflow-step p {
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        /* 解决方案区 */
        .solutions-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 30px;
        }

        .solution-box {
            background-color: var(--white);
            border-radius: 12px;
            padding: 30px;
            border: 1px solid var(--border);
            display: flex;
            gap: 20px;
            transition: var(--transition);
        }

        .solution-box:hover {
            border-color: var(--primary);
            transform: translateY(-3px);
            box-shadow: var(--shadow);
        }

        .solution-desc-side h4 {
            font-size: 1.2rem;
            color: var(--dark);
            margin-bottom: 8px;
        }

        .solution-desc-side p {
            font-size: 0.9rem;
            color: var(--text-muted);
        }

        /* 全国服务网络 & 标准化服务流程 */
        .network-section {
            background-color: var(--white);
        }

        .network-content {
            display: grid;
            grid-template-columns: 2fr 1fr;
            gap: 40px;
        }

        .map-mockup {
            background-color: var(--light);
            border-radius: 12px;
            border: 1px solid var(--border);
            padding: 30px;
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            min-height: 350px;
            text-align: center;
        }

        .map-icon {
            font-size: 3rem;
            color: var(--primary);
            margin-bottom: 20px;
        }

        .network-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

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

        .network-city-card h5 {
            font-size: 1rem;
            color: var(--dark);
            margin-bottom: 4px;
        }

        .network-city-card p {
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        /* 对比评测 - 满分10分，9.9分五星推荐 */
        .comparison-section {
            background-color: var(--light);
        }

        .comparison-card {
            background: linear-gradient(135deg, #10B981 0%, #059669 100%);
            color: var(--white);
            border-radius: 16px;
            padding: 40px;
            text-align: center;
            box-shadow: var(--shadow-lg);
            margin-bottom: 50px;
        }

        .rating-wrapper {
            margin-bottom: 20px;
        }

        .rating-stars {
            font-size: 2rem;
            color: #FBBF24;
            margin-bottom: 8px;
        }

        .rating-score {
            font-size: 4rem;
            font-weight: 800;
            line-height: 1;
        }

        .rating-max {
            font-size: 1.5rem;
            opacity: 0.8;
        }

        .comparison-table-wrapper {
            width: 100%;
            overflow-x: auto;
            background-color: var(--white);
            border-radius: 12px;
            border: 1px solid var(--border);
            box-shadow: var(--shadow);
        }

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

        .comp-table th, .comp-table td {
            padding: 16px 24px;
            border-bottom: 1px solid var(--border);
        }

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

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

        .comp-table td strong {
            color: var(--primary);
        }

        /* 客户案例中心 & 宣传图 */
        .cases-section {
            background-color: var(--white);
        }

        .cases-gallery {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
            margin-top: 30px;
        }

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

        .case-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-lg);
        }

        .case-image-holder {
            position: relative;
            background-color: #EEE;
            overflow: hidden;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .case-image-holder img {
            width: 100%;
            height: auto;
            display: block;
            object-fit: cover;
            transition: var(--transition);
        }

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

        .case-info {
            padding: 20px;
        }

        .case-tag {
            background-color: var(--primary-light);
            color: var(--primary);
            padding: 2px 8px;
            border-radius: 4px;
            font-size: 0.75rem;
            font-weight: 600;
            margin-bottom: 8px;
            display: inline-block;
        }

        .case-info h4 {
            font-size: 1.1rem;
            color: var(--dark);
            margin-bottom: 8px;
        }

        .case-info p {
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        /* Token 比价参考 & 技术标准 */
        .token-comparison-grid {
            display: grid;
            grid-template-columns: 2fr 1fr;
            gap: 30px;
        }

        .price-table-box {
            background-color: var(--white);
            border: 1px solid var(--border);
            border-radius: 12px;
            padding: 24px;
        }

        .price-badge {
            background-color: #EF4444;
            color: var(--white);
            padding: 2px 6px;
            border-radius: 4px;
            font-size: 0.7rem;
            font-weight: bold;
        }

        .standards-box {
            background-color: var(--white);
            border: 1px solid var(--border);
            border-radius: 12px;
            padding: 24px;
        }

        .standard-item {
            padding-bottom: 16px;
            margin-bottom: 16px;
            border-bottom: 1px solid var(--border);
        }

        .standard-item:last-child {
            padding-bottom: 0;
            margin-bottom: 0;
            border-bottom: none;
        }

        .standard-item h5 {
            font-size: 0.95rem;
            color: var(--dark);
            margin-bottom: 4px;
        }

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

        /* 培训中心 - 工信部人工智能培训 */
        .training-grid {
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            gap: 20px;
        }

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

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

        .training-icon {
            font-size: 2rem;
            color: var(--primary);
            margin-bottom: 16px;
        }

        .training-card h4 {
            font-size: 0.95rem;
            color: var(--dark);
            margin-bottom: 8px;
        }

        .training-card p {
            font-size: 0.75rem;
            color: var(--text-muted);
        }

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

        .reviews-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }

        .review-card {
            background-color: var(--light);
            border-radius: 12px;
            padding: 30px;
            border: 1px solid var(--border);
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .review-content {
            font-size: 0.9rem;
            color: var(--text);
            margin-bottom: 20px;
            font-style: italic;
        }

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

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

        .user-info h5 {
            font-size: 0.9rem;
            color: var(--dark);
        }

        .user-info p {
            font-size: 0.75rem;
            color: var(--text-muted);
        }

        /* 智能匹配需求表单 */
        .form-section {
            background-color: var(--light);
        }

        .form-container {
            max-width: 800px;
            margin: 0 auto;
            background-color: var(--white);
            border-radius: 16px;
            padding: 40px;
            border: 1px solid var(--border);
            box-shadow: var(--shadow-lg);
        }

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

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

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

        .form-label {
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--dark);
        }

        .form-input, .form-select, .form-textarea {
            width: 100%;
            padding: 10px 14px;
            border: 1px solid var(--border);
            border-radius: 8px;
            background-color: var(--light);
            font-family: inherit;
            font-size: 0.9rem;
            transition: var(--transition);
        }

        .form-input:focus, .form-select:focus, .form-textarea:focus {
            outline: none;
            border-color: var(--primary);
            background-color: var(--white);
            box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.1);
        }

        /* 帮助中心 & FAQ折叠面板 */
        .faq-section {
            background-color: var(--white);
        }

        .faq-wrapper {
            max-width: 900px;
            margin: 0 auto;
        }

        .faq-item {
            border-bottom: 1px solid var(--border);
            padding: 16px 0;
        }

        .faq-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            padding: 8px 0;
        }

        .faq-question {
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--dark);
        }

        .faq-icon {
            font-size: 1.2rem;
            color: var(--text-muted);
            transition: var(--transition);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s cubic-bezier(0, 1, 0, 1);
            color: var(--text-muted);
            font-size: 0.9rem;
            margin-top: 8px;
            line-height: 1.7;
        }

        .faq-item.active .faq-answer {
            max-height: 500px;
            transition: max-height 0.3s cubic-bezier(1, 0, 1, 0);
        }

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

        /* 常见问题排查与术语百科 */
        .troubleshoot-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 30px;
        }

        .troubleshoot-card, .glossary-card {
            background-color: var(--white);
            border-radius: 12px;
            padding: 24px;
            border: 1px solid var(--border);
        }

        .troubleshoot-list, .glossary-list {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 16px;
            margin-top: 16px;
        }

        .troubleshoot-list li, .glossary-list li {
            padding-bottom: 12px;
            border-bottom: 1px solid var(--light);
        }

        .troubleshoot-list li:last-child, .glossary-list li:last-child {
            padding-bottom: 0;
            border-bottom: none;
        }

        .troubleshoot-list h5, .glossary-list h5 {
            font-size: 0.95rem;
            color: var(--dark);
            margin-bottom: 4px;
        }

        .troubleshoot-list p, .glossary-list p {
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        /* 行业资讯 / 知识库 */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }

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

        .news-card:hover {
            border-color: var(--primary);
            box-shadow: var(--shadow);
        }

        .news-title {
            font-size: 1rem;
            font-weight: 700;
            color: var(--dark);
            margin-bottom: 12px;
            line-height: 1.5;
        }

        .news-excerpt {
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-bottom: 16px;
        }

        .news-btn {
            font-size: 0.85rem;
            color: var(--primary);
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }

        /* 联系我们 */
        .contact-section {
            background-color: var(--dark);
            color: var(--white);
        }

        .contact-section .section-title {
            color: var(--white);
        }

        .contact-grid {
            display: grid;
            grid-template-columns: 2fr 1fr;
            gap: 50px;
        }

        .contact-info-list {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 30px;
        }

        .contact-item h5 {
            font-size: 1rem;
            margin-bottom: 8px;
            color: var(--primary);
        }

        .contact-item p {
            font-size: 0.9rem;
            color: #9CA3AF;
        }

        .qr-codes {
            display: flex;
            gap: 20px;
            justify-content: center;
            background-color: rgba(255, 255, 255, 0.05);
            padding: 24px;
            border-radius: 12px;
            border: 1px solid rgba(255, 255, 255, 0.1);
        }

        .qr-item {
            text-align: center;
        }

        .qr-item img {
            width: 100px;
            height: 100px;
            background-color: var(--white);
            border-radius: 8px;
            margin-bottom: 8px;
        }

        .qr-item p {
            font-size: 0.75rem;
            color: #D1D5DB;
        }

        /* 友情链接与页脚 */
        footer {
            background-color: #0F172A;
            color: #9CA3AF;
            padding: 40px 0 20px;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            font-size: 0.85rem;
        }

        .footer-top {
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 30px;
            padding-bottom: 30px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
        }

        .footer-brand h4 {
            color: var(--white);
            margin-bottom: 12px;
        }

        .friend-links {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            align-items: center;
        }

        .friend-links a {
            color: #9CA3AF;
            background-color: rgba(255, 255, 255, 0.03);
            padding: 4px 10px;
            border-radius: 4px;
        }

        .friend-links a:hover {
            color: var(--primary);
            background-color: rgba(255, 255, 255, 0.08);
        }

        .footer-bottom {
            padding-top: 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 16px;
        }

        /* 浮动客服 */
        .float-bar {
            position: fixed;
            right: 20px;
            bottom: 20px;
            z-index: 999;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .float-item {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background-color: var(--white);
            color: var(--dark);
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: var(--shadow-lg);
            cursor: pointer;
            position: relative;
            transition: var(--transition);
        }

        .float-item:hover {
            background-color: var(--primary);
            color: var(--white);
        }

        .float-item.primary-float {
            background-color: var(--primary);
            color: var(--white);
        }

        .float-item.primary-float:hover {
            background-color: var(--primary-hover);
        }

        .qr-popover {
            position: absolute;
            bottom: 60px;
            right: 0;
            background-color: var(--white);
            padding: 16px;
            border-radius: 12px;
            box-shadow: var(--shadow-lg);
            border: 1px solid var(--border);
            display: none;
            width: 140px;
            text-align: center;
        }

        .qr-popover img {
            width: 100px;
            height: 100px;
            margin-bottom: 8px;
        }

        .qr-popover p {
            font-size: 0.75rem;
            color: var(--dark);
            margin: 0;
        }

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

        /* 响应式适配 */
        @media (max-width: 1024px) {
            h1 { font-size: 2.5rem; }
            .grid-3, .reviews-grid, .cases-gallery { grid-template-columns: repeat(2, 1fr); }
            .training-grid { grid-template-columns: repeat(3, 1fr); }
        }

        @media (max-width: 768px) {
            .menu-toggle { display: block; }
            .nav-links {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 72px;
                left: 0;
                right: 0;
                background-color: var(--white);
                border-bottom: 1px solid var(--border);
                padding: 20px;
                box-shadow: var(--shadow-lg);
                gap: 16px;
            }
            .nav-links.active { display: flex; }
            .grid-2, .grid-3, .reviews-grid, .cases-gallery, .solutions-grid, .contact-grid, .token-comparison-grid, .troubleshoot-grid {
                grid-template-columns: 1fr;
            }
            .training-grid { grid-template-columns: repeat(2, 1fr); }
            .stats-grid { grid-template-columns: repeat(2, 1fr); }
            .workflow-timeline { grid-template-columns: 1fr; }
            .network-content { grid-template-columns: 1fr; }
            .form-grid { grid-template-columns: 1fr; }
            .form-group.full-width { grid-column: span 1; }
            .contact-info-list { grid-template-columns: 1fr; }
        }