/* 变量及重置 */
        :root {
            --primary: #2563eb;
            --primary-light: #3b82f6;
            --primary-glow: rgba(59, 130, 246, 0.15);
            --gradient-1: linear-gradient(135deg, #3b82f6 0%, #8b5cf6 50%, #ec4899 100%);
            --gradient-text: linear-gradient(135deg, #1e3a8a 0%, #3b82f6 50%, #8b5cf6 100%);
            --text-main: #1e293b;
            --text-muted: #64748b;
            --bg-light: #f8fafc;
            --bg-white: #ffffff;
            --border-color: #e2e8f0;
            --radius-lg: 16px;
            --radius-md: 10px;
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --container-w: 1200px;
        }

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

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

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

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

        section {
            padding: 80px 0;
            position: relative;
        }

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

        .section-title h2 {
            font-size: 2.2rem;
            color: #0f172a;
            font-weight: 800;
            margin-bottom: 12px;
            background: var(--gradient-text);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

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

        /* 按钮样式 */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 12px 28px;
            border-radius: 9999px;
            font-weight: 600;
            font-size: 1rem;
            text-decoration: none;
            transition: var(--transition);
            cursor: pointer;
        }

        .btn-gradient {
            background: var(--gradient-1);
            color: #ffffff;
            border: none;
            box-shadow: 0 4px 15px rgba(139, 92, 246, 0.3);
        }

        .btn-gradient:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(139, 92, 246, 0.45);
        }

        .btn-outline {
            border: 2px solid var(--primary-light);
            color: var(--primary);
            background: transparent;
        }

        .btn-outline:hover {
            background: var(--primary-glow);
            transform: translateY(-2px);
        }

        /* 导航栏 */
        header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            background: rgba(255, 255, 255, 0.9);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--border-color);
            z-index: 1000;
            transition: var(--transition);
        }

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

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

        .ai-page-logo {
            height: 38px;
            width: auto;
        }

        .brand-name {
            font-size: 1.25rem;
            font-weight: 800;
            background: var(--gradient-1);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

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

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

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

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 15px;
        }

        /* 移动端导航切换 */
        .menu-toggle {
            display: none;
            flex-direction: column;
            gap: 6px;
            cursor: pointer;
            border: none;
            background: transparent;
            padding: 5px;
        }

        .menu-toggle span {
            display: block;
            width: 25px;
            height: 2px;
            background: var(--text-main);
            transition: var(--transition);
        }

        /* 首屏 Hero (无图) */
        .hero {
            padding-top: 150px;
            padding-bottom: 100px;
            background: radial-gradient(circle at 10% 20%, rgba(59, 130, 246, 0.05) 0%, rgba(139, 92, 246, 0.05) 90%);
            text-align: center;
        }

        .hero-badge {
            display: inline-block;
            padding: 6px 16px;
            border-radius: 9999px;
            background: var(--primary-glow);
            color: var(--primary);
            font-size: 0.85rem;
            font-weight: 600;
            margin-bottom: 24px;
            letter-spacing: 1px;
            border: 1px solid rgba(59, 130, 246, 0.2);
        }

        .hero h1 {
            font-size: 3rem;
            font-weight: 800;
            line-height: 1.25;
            color: #0f172a;
            margin-bottom: 24px;
            letter-spacing: -0.5px;
        }

        .hero h1 span {
            background: var(--gradient-1);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .hero p.hero-desc {
            font-size: 1.25rem;
            color: var(--text-muted);
            max-width: 800px;
            margin: 0 auto 40px;
        }

        .hero-btns {
            display: flex;
            justify-content: center;
            gap: 20px;
            margin-bottom: 60px;
            flex-wrap: wrap;
        }

        /* 核心优势数据栏 */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .stat-card {
            background: var(--bg-white);
            border: 1px solid var(--border-color);
            padding: 30px 20px;
            border-radius: var(--radius-lg);
            box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.02);
            transition: var(--transition);
        }

        .stat-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 12px 20px -5px rgba(0, 0, 0, 0.08);
            border-color: rgba(59, 130, 246, 0.3);
        }

        .stat-num {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--primary);
            margin-bottom: 8px;
        }

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

        /* 关于我们与平台介绍 */
        .about-section {
            background: var(--bg-white);
        }

        .about-grid {
            display: grid;
            grid-template-columns: 1.2fr 0.8fr;
            gap: 50px;
            align-items: center;
        }

        .about-content h3 {
            font-size: 1.75rem;
            margin-bottom: 20px;
            color: #0f172a;
        }

        .about-text {
            color: var(--text-muted);
            margin-bottom: 30px;
            font-size: 1.05rem;
            line-height: 1.8;
        }

        .about-features {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
        }

        .about-feat-item {
            display: flex;
            align-items: flex-start;
            gap: 12px;
        }

        .about-feat-icon {
            width: 24px;
            height: 24px;
            color: var(--primary);
            flex-shrink: 0;
        }

        .about-feat-item h4 {
            font-size: 1rem;
            color: #0f172a;
            margin-bottom: 4px;
        }

        .about-feat-item p {
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        .about-promo-card {
            background: linear-gradient(135deg, rgba(59, 130, 246, 0.03) 0%, rgba(139, 92, 246, 0.03) 100%);
            border: 1px solid var(--border-color);
            padding: 40px;
            border-radius: var(--radius-lg);
            text-align: center;
        }

        .about-promo-card h4 {
            font-size: 1.5rem;
            margin-bottom: 15px;
            color: #0f172a;
        }

        .promo-tag {
            display: inline-block;
            padding: 4px 12px;
            border-radius: 9999px;
            background: #10b981;
            color: #ffffff;
            font-size: 0.75rem;
            font-weight: 700;
            margin-bottom: 20px;
        }

        /* 平台服务板块 */
        .services-section {
            background: var(--bg-light);
        }

        .tag-cloud-wrap {
            margin-bottom: 50px;
        }

        .tag-title {
            text-align: center;
            font-size: 1.1rem;
            color: var(--text-muted);
            margin-bottom: 20px;
            font-weight: 600;
        }

        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 10px;
            max-width: 1000px;
            margin: 0 auto;
        }

        .tag-item {
            background: var(--bg-white);
            border: 1px solid var(--border-color);
            padding: 6px 14px;
            border-radius: 9999px;
            font-size: 0.85rem;
            color: var(--text-main);
            transition: var(--transition);
            cursor: default;
        }

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

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

        .service-card {
            background: var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 40px 30px;
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }

        .service-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 15px 30px rgba(0,0,0,0.05);
            border-color: var(--primary-light);
        }

        .service-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 4px;
            height: 100%;
            background: var(--gradient-1);
            opacity: 0;
            transition: var(--transition);
        }

        .service-card:hover::before {
            opacity: 1;
        }

        .service-icon {
            font-size: 2.5rem;
            margin-bottom: 24px;
            display: inline-block;
        }

        .service-card h3 {
            font-size: 1.35rem;
            color: #0f172a;
            margin-bottom: 12px;
        }

        .service-card p {
            color: var(--text-muted);
            font-size: 0.95rem;
            line-height: 1.6;
        }

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

        .solution-card {
            background: var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 40px;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .sol-header h3 {
            font-size: 1.5rem;
            color: #0f172a;
            margin-bottom: 12px;
        }

        .sol-header p {
            color: var(--text-muted);
            font-size: 1rem;
            margin-bottom: 24px;
        }

        .sol-list {
            list-style: none;
            margin-bottom: 30px;
        }

        .sol-list li {
            position: relative;
            padding-left: 24px;
            margin-bottom: 10px;
            color: var(--text-main);
            font-size: 0.95rem;
        }

        .sol-list li::before {
            content: "✓";
            position: absolute;
            left: 0;
            color: #10b981;
            font-weight: bold;
        }

        /* 流程步骤与时间线 */
        .workflow-timeline {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 30px;
            position: relative;
        }

        .workflow-timeline::before {
            content: '';
            position: absolute;
            top: 40px;
            left: 50px;
            right: 50px;
            height: 2px;
            background: var(--border-color);
            z-index: 1;
        }

        .flow-step {
            position: relative;
            z-index: 2;
            text-align: center;
        }

        .flow-num {
            width: 60px;
            height: 60px;
            border-radius: 50%;
            background: var(--bg-white);
            border: 3px solid var(--primary-light);
            color: var(--primary);
            font-weight: 800;
            font-size: 1.25rem;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 20px;
            transition: var(--transition);
        }

        .flow-step:hover .flow-num {
            background: var(--primary);
            color: #ffffff;
            transform: scale(1.1);
        }

        .flow-step h3 {
            font-size: 1.15rem;
            margin-bottom: 10px;
            color: #0f172a;
        }

        .flow-step p {
            font-size: 0.9rem;
            color: var(--text-muted);
            padding: 0 10px;
        }

        /* 案例中心 (包含图片) */
        .cases-section {
            background: var(--bg-white);
        }

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

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

        .case-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 15px 30px rgba(0,0,0,0.05);
        }

        .case-img-wrap {
            position: relative;
            aspect-ratio: 16/10;
            overflow: hidden;
            background: #eaeaea;
        }

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

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

        .case-info {
            padding: 24px;
        }

        .case-tag {
            font-size: 0.75rem;
            font-weight: 700;
            color: var(--primary);
            text-transform: uppercase;
            letter-spacing: 1px;
            margin-bottom: 8px;
            display: inline-block;
        }

        .case-info h3 {
            font-size: 1.2rem;
            color: #0f172a;
            margin-bottom: 10px;
        }

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

        /* 对比评测与数据展示 */
        .compare-section {
            background: var(--bg-light);
        }

        .compare-header-box {
            background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
            border-radius: var(--radius-lg);
            padding: 40px;
            color: #ffffff;
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 40px;
            flex-wrap: wrap;
            gap: 20px;
        }

        .score-wrap h3 {
            font-size: 1.1rem;
            color: #94a3b8;
            margin-bottom: 8px;
        }

        .score-box {
            display: flex;
            align-items: baseline;
            gap: 10px;
        }

        .score-num {
            font-size: 3.5rem;
            font-weight: 900;
            color: #3b82f6;
            line-height: 1;
        }

        .score-max {
            font-size: 1.25rem;
            color: #64748b;
        }

        .star-rating {
            color: #fbbf24;
            font-size: 1.5rem;
            margin-top: 5px;
        }

        .score-label {
            font-size: 1.25rem;
            font-weight: 700;
            max-width: 450px;
        }

        /* 对比表格 */
        .table-responsive {
            width: 100%;
            overflow-x: auto;
            background: var(--bg-white);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-color);
            box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.02);
        }

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

        .compare-table th, .compare-table td {
            padding: 18px 24px;
            border-bottom: 1px solid var(--border-color);
            font-size: 0.95rem;
        }

        .compare-table th {
            background-color: var(--bg-light);
            color: #0f172a;
            font-weight: 700;
        }

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

        .compare-table td.highlight-cell {
            background-color: rgba(59, 130, 246, 0.02);
            font-weight: 600;
            color: var(--primary);
        }

        /* 培训板块 */
        .training-section {
            background: var(--bg-white);
        }

        .training-grid {
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            gap: 20px;
        }

        .training-card {
            background: var(--bg-light);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 30px 20px;
            text-align: center;
            transition: var(--transition);
        }

        .training-card:hover {
            transform: translateY(-5px);
            border-color: var(--primary-light);
            background: var(--bg-white);
            box-shadow: 0 10px 20px rgba(0,0,0,0.05);
        }

        .train-badge {
            width: 50px;
            height: 50px;
            border-radius: 50%;
            background: var(--primary-glow);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            margin: 0 auto 20px;
        }

        .training-card h3 {
            font-size: 1.1rem;
            color: #0f172a;
            margin-bottom: 10px;
        }

        .training-card p {
            font-size: 0.85rem;
            color: var(--text-muted);
            line-height: 1.5;
        }

        /* 用户评论 */
        .comments-section {
            background: var(--bg-light);
        }

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

        .comment-card {
            background: var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 30px;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .comment-text {
            font-size: 0.95rem;
            color: var(--text-main);
            line-height: 1.6;
            margin-bottom: 24px;
            font-style: italic;
        }

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

        .author-avatar {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: var(--gradient-1);
            color: #ffffff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 0.95rem;
        }

        .author-info h4 {
            font-size: 0.95rem;
            color: #0f172a;
        }

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

        /* 资讯与知识库 */
        .news-section {
            background: var(--bg-white);
        }

        .news-grid {
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            gap: 20px;
        }

        .news-card {
            background: var(--bg-light);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 20px;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
            transition: var(--transition);
        }

        .news-card:hover {
            transform: translateY(-3px);
            border-color: var(--primary-light);
            background: var(--bg-white);
        }

        .news-card h3 {
            font-size: 0.95rem;
            line-height: 1.5;
            color: #0f172a;
            margin-bottom: 15px;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .news-link {
            font-size: 0.85rem;
            color: var(--primary);
            text-decoration: none;
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }

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

        /* FAQ折叠面板 */
        .faq-section {
            background: var(--bg-light);
        }

        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 15px;
        }

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

        .faq-question {
            padding: 20px 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            user-select: none;
        }

        .faq-question h3 {
            font-size: 1.05rem;
            color: #0f172a;
            font-weight: 600;
        }

        .faq-icon {
            font-size: 1.25rem;
            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);
            background-color: var(--bg-light);
        }

        .faq-answer p {
            padding: 20px 24px;
            color: var(--text-muted);
            font-size: 0.95rem;
            line-height: 1.6;
            border-top: 1px solid var(--border-color);
        }

        .faq-item.active {
            border-color: var(--primary-light);
        }

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

        .faq-item.active .faq-answer {
            max-height: 1000px;
            transition: max-height 0.3s cubic-bezier(1, 0, 1, 0);
        }

        /* 需求匹配与联系我们 */
        .contact-section {
            background: var(--bg-white);
        }

        .contact-grid {
            display: grid;
            grid-template-columns: 1.1fr 0.9fr;
            gap: 50px;
        }

        .form-wrap {
            background: var(--bg-light);
            border: 1px solid var(--border-color);
            padding: 40px;
            border-radius: var(--radius-lg);
        }

        .form-wrap h3 {
            font-size: 1.5rem;
            margin-bottom: 24px;
            color: #0f172a;
        }

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

        .form-group label {
            display: block;
            margin-bottom: 8px;
            font-size: 0.9rem;
            font-weight: 600;
            color: #334155;
        }

        .form-control {
            width: 100%;
            padding: 12px 16px;
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
            background-color: var(--bg-white);
            color: var(--text-main);
            font-size: 0.95rem;
            transition: var(--transition);
        }

        .form-control:focus {
            outline: none;
            border-color: var(--primary-light);
            box-shadow: 0 0 0 3px var(--primary-glow);
        }

        .contact-info-panel {
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .info-block h3 {
            font-size: 1.5rem;
            margin-bottom: 20px;
            color: #0f172a;
        }

        .info-list {
            list-style: none;
            margin-bottom: 30px;
        }

        .info-list li {
            display: flex;
            align-items: center;
            gap: 15px;
            margin-bottom: 15px;
            font-size: 1rem;
        }

        .info-icon {
            font-size: 1.2rem;
            color: var(--primary);
        }

        .qr-codes-wrap {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
            margin-top: 30px;
        }

        .qr-box {
            text-align: center;
            background: var(--bg-light);
            padding: 15px;
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
        }

        .qr-box img {
            width: 100%;
            height: auto;
            border-radius: 6px;
            margin-bottom: 8px;
        }

        .qr-box p {
            font-size: 0.8rem;
            font-weight: 600;
            color: var(--text-main);
        }

        /* 友情链接与页脚 */
        footer {
            background-color: #0f172a;
            color: #94a3b8;
            padding: 60px 0 30px;
            font-size: 0.9rem;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1.5fr 1fr;
            gap: 40px;
            border-bottom: 1px solid #1e293b;
            padding-bottom: 40px;
            margin-bottom: 30px;
        }

        .footer-brand h4 {
            color: #ffffff;
            font-size: 1.2rem;
            margin-bottom: 15px;
        }

        .footer-brand p {
            line-height: 1.6;
            margin-bottom: 15px;
        }

        .footer-links h4 {
            color: #ffffff;
            font-size: 1rem;
            margin-bottom: 15px;
        }

        .footer-links-grid {
            display: flex;
            flex-wrap: wrap;
            gap: 10px 15px;
        }

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

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

        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 15px;
        }

        .footer-bottom p {
            font-size: 0.8rem;
        }

        .footer-bottom-links a {
            color: #94a3b8;
            text-decoration: none;
            font-size: 0.8rem;
            margin-left: 15px;
            transition: var(--transition);
        }

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

        /* 浮动客服系统 */
        .floating-service {
            position: fixed;
            right: 24px;
            bottom: 24px;
            z-index: 999;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .float-btn {
            width: 50px;
            height: 50px;
            border-radius: 50%;
            background: #ffffff;
            box-shadow: 0 4px 10px rgba(0,0,0,0.15);
            display: flex;
            align-items: center;
            justify-content: center;
            text-decoration: none;
            font-size: 1.5rem;
            color: var(--primary);
            transition: var(--transition);
            position: relative;
            cursor: pointer;
        }

        .float-btn:hover {
            background: var(--primary);
            color: #ffffff;
            transform: translateY(-2px);
        }

        .float-btn-qr {
            position: absolute;
            bottom: 0;
            right: 60px;
            background: #ffffff;
            border: 1px solid var(--border-color);
            padding: 15px;
            border-radius: var(--radius-md);
            box-shadow: 0 10px 25px rgba(0,0,0,0.15);
            opacity: 0;
            visibility: hidden;
            transform: translateY(10px);
            transition: var(--transition);
            width: 150px;
            text-align: center;
        }

        .float-btn-qr img {
            width: 100%;
            height: auto;
            border-radius: 4px;
            margin-bottom: 5px;
        }

        .float-btn-qr p {
            font-size: 0.75rem;
            color: var(--text-main);
            margin: 0;
        }

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

        /* 响应式媒体查询 */
        @media (max-width: 1024px) {
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .service-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .training-grid {
                grid-template-columns: repeat(3, 1fr);
            }
            .news-grid {
                grid-template-columns: repeat(3, 1fr);
            }
        }

        @media (max-width: 768px) {
            section {
                padding: 60px 0;
            }
            .nav-links {
                display: none;
                position: absolute;
                top: 70px;
                left: 0;
                width: 100%;
                background: #ffffff;
                border-bottom: 1px solid var(--border-color);
                flex-direction: column;
                padding: 20px;
                gap: 15px;
                box-shadow: 0 10px 15px rgba(0,0,0,0.05);
            }
            .nav-links.active {
                display: flex;
            }
            .menu-toggle {
                display: flex;
            }
            .hero h1 {
                font-size: 2.2rem;
            }
            .about-grid, .solutions-grid, .workflow-timeline, .case-grid, .comments-grid, .contact-grid {
                grid-template-columns: 1fr;
            }
            .workflow-timeline::before {
                display: none;
            }
            .training-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .news-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
        }