/* 变量定义与高亮度鲜活风设计 */
        :root {
            --primary: #0066ff;
            --primary-light: #e6f0ff;
            --secondary: #00f2fe;
            --accent: #ff6a00;
            --text-main: #1e293b;
            --text-muted: #64748b;
            --bg-light: #f8fafc;
            --bg-white: #ffffff;
            --border-color: #e2e8f0;
            --radius-lg: 16px;
            --radius-md: 8px;
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --max-width: 1200px;
        }

        /* 基础重置 */
        * {
            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(--text-main);
            background-color: var(--bg-light);
            line-height: 1.6;
        }
        body {
            overflow-x: hidden;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--accent);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        /* 容器规范 */
        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }
        section {
            padding: 80px 0;
            position: relative;
            background-color: var(--bg-white);
        }
        section:nth-child(even) {
            background-color: var(--bg-light);
        }

        /* 统一标题 */
        .section-header {
            text-align: center;
            margin-bottom: 50px;
        }
        .section-header h2 {
            font-size: 2.2rem;
            color: #0f172a;
            margin-bottom: 12px;
            font-weight: 800;
            letter-spacing: -0.5px;
        }
        .section-header p {
            color: var(--text-muted);
            max-width: 600px;
            margin: 0 auto;
            font-size: 1.1rem;
        }

        /* 导航栏 */
        header {
            position: sticky;
            top: 0;
            background: rgba(255, 255, 255, 0.9);
            backdrop-filter: blur(12px);
            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-area {
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .logo-area img {
            height: 40px;
            width: auto;
        }
        .nav-links {
            display: flex;
            gap: 20px;
            align-items: center;
        }
        .nav-item {
            color: #334155;
            font-weight: 500;
            font-size: 0.95rem;
            padding: 6px 12px;
            border-radius: var(--radius-md);
        }
        .nav-item:hover {
            background-color: var(--primary-light);
            color: var(--primary);
        }
        .nav-btn {
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: #fff;
            padding: 8px 18px;
            border-radius: 30px;
            font-weight: 600;
            font-size: 0.9rem;
            box-shadow: 0 4px 15px rgba(0, 102, 255, 0.2);
        }
        .nav-btn:hover {
            transform: translateY(-2px);
            color: #fff;
            box-shadow: 0 6px 20px rgba(0, 102, 255, 0.3);
        }
        
        /* 移动端导航切换 */
        .menu-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            cursor: pointer;
            color: var(--text-main);
        }

        /* 首页 Hero 区域 (无图片) */
        .hero-section {
            background: radial-gradient(circle at 80% 20%, rgba(0, 242, 254, 0.15) 0%, rgba(255, 255, 255, 0) 50%),
                        radial-gradient(circle at 10% 80%, rgba(0, 102, 255, 0.1) 0%, rgba(255, 255, 255, 0) 50%),
                        var(--bg-white);
            padding: 100px 0 80px 0;
            text-align: center;
            border-bottom: 1px solid var(--border-color);
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            background: var(--primary-light);
            color: var(--primary);
            padding: 6px 16px;
            border-radius: 30px;
            font-size: 0.85rem;
            font-weight: 700;
            margin-bottom: 24px;
            border: 1px solid rgba(0, 102, 255, 0.15);
        }
        h1.hero-title {
            font-size: 3rem;
            font-weight: 900;
            color: #0f172a;
            line-height: 1.25;
            margin-bottom: 20px;
            background: linear-gradient(135deg, #0f172a 30%, var(--primary) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .hero-desc {
            font-size: 1.2rem;
            color: var(--text-muted);
            max-width: 800px;
            margin: 0 auto 40px auto;
        }
        .hero-cta {
            display: flex;
            justify-content: center;
            gap: 16px;
            margin-bottom: 60px;
            flex-wrap: wrap;
        }
        .btn-main {
            background: linear-gradient(135deg, var(--primary), #0052cc);
            color: #fff !important;
            padding: 14px 32px;
            border-radius: 30px;
            font-weight: 700;
            font-size: 1.05rem;
            box-shadow: 0 8px 25px rgba(0, 102, 255, 0.35);
            transition: var(--transition);
        }
        .btn-main:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 30px rgba(0, 102, 255, 0.45);
        }
        .btn-secondary {
            background: var(--bg-white);
            color: var(--text-main);
            border: 2px solid var(--border-color);
            padding: 12px 30px;
            border-radius: 30px;
            font-weight: 700;
            font-size: 1.05rem;
            transition: var(--transition);
        }
        .btn-secondary:hover {
            border-color: var(--primary);
            color: var(--primary);
            transform: translateY(-3px);
        }

        /* 数据指标卡片 */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            margin-top: 40px;
        }
        .stat-card {
            background: var(--bg-white);
            border: 1px solid var(--border-color);
            padding: 30px 20px;
            border-radius: var(--radius-lg);
            box-shadow: 0 4px 20px rgba(0,0,0,0.02);
            transition: var(--transition);
        }
        .stat-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 30px rgba(0, 102, 255, 0.08);
            border-color: rgba(0, 102, 255, 0.2);
        }
        .stat-num {
            font-size: 2.5rem;
            font-weight: 800;
            color: var(--primary);
            margin-bottom: 8px;
            line-height: 1;
        }
        .stat-label {
            font-size: 0.95rem;
            color: var(--text-muted);
            font-weight: 500;
        }

        /* 平台介绍 & 关于我们 */
        .intro-grid {
            display: grid;
            grid-template-columns: 1.1fr 0.9fr;
            gap: 50px;
            align-items: center;
        }
        .intro-content h3 {
            font-size: 1.8rem;
            color: #0f172a;
            margin-bottom: 20px;
            font-weight: 700;
        }
        .intro-text {
            color: var(--text-muted);
            margin-bottom: 24px;
            font-size: 1.05rem;
        }
        .intro-features {
            list-style: none;
        }
        .intro-features li {
            position: relative;
            padding-left: 28px;
            margin-bottom: 12px;
            font-weight: 600;
            color: #334155;
        }
        .intro-features li::before {
            content: "✓";
            position: absolute;
            left: 0;
            top: 2px;
            color: var(--primary);
            font-weight: 900;
            font-size: 1.1rem;
        }
        .intro-visual {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: 0 20px 40px rgba(0,0,0,0.08);
        }

        /* 全平台 AIGC 服务 */
        .models-box {
            background: var(--primary-light);
            border: 1px dashed rgba(0,102,255,0.3);
            border-radius: var(--radius-lg);
            padding: 30px;
            margin-bottom: 40px;
        }
        .models-title {
            font-weight: 700;
            font-size: 1.1rem;
            color: var(--primary);
            margin-bottom: 20px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .models-tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }
        .model-tag {
            background: var(--bg-white);
            color: var(--text-main);
            padding: 6px 14px;
            border-radius: 30px;
            font-size: 0.85rem;
            font-weight: 600;
            box-shadow: 0 2px 5px rgba(0,0,0,0.03);
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .model-tag:hover {
            border-color: var(--primary);
            color: var(--primary);
            transform: scale(1.05);
        }

        .services-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }
        .service-card {
            background: var(--bg-white);
            border: 1px solid var(--border-color);
            padding: 35px;
            border-radius: var(--radius-lg);
            transition: var(--transition);
        }
        .service-card:hover {
            transform: translateY(-8px);
            box-shadow: 0 15px 35px rgba(0,0,0,0.06);
            border-color: var(--primary);
        }
        .service-icon {
            width: 50px;
            height: 50px;
            background: var(--primary-light);
            border-radius: var(--radius-md);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            font-size: 1.5rem;
            margin-bottom: 24px;
            font-weight: bold;
        }
        .service-card h3 {
            font-size: 1.3rem;
            margin-bottom: 14px;
            color: #0f172a;
        }
        .service-card p {
            color: var(--text-muted);
            font-size: 0.95rem;
        }

        /* 一站式 AIGC 制作与解决方案 */
        .solutions-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 40px;
            margin-bottom: 50px;
        }
        .solution-box {
            display: flex;
            gap: 24px;
            background: var(--bg-white);
            padding: 30px;
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-color);
        }
        .solution-img-wrapper {
            flex-shrink: 0;
            width: 140px;
            height: 140px;
            border-radius: var(--radius-md);
            overflow: hidden;
        }
        .solution-img-wrapper img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .solution-info h3 {
            font-size: 1.25rem;
            margin-bottom: 10px;
            color: #0f172a;
        }
        .solution-info p {
            color: var(--text-muted);
            font-size: 0.9rem;
            margin-bottom: 15px;
        }

        /* 标准化流程 & 技术标准 */
        .timeline {
            display: flex;
            justify-content: space-between;
            position: relative;
            margin: 50px 0;
            flex-wrap: wrap;
            gap: 30px;
        }
        .timeline::before {
            content: "";
            position: absolute;
            top: 25px;
            left: 0;
            right: 0;
            height: 4px;
            background: var(--border-color);
            z-index: 1;
        }
        .timeline-step {
            flex: 1;
            min-width: 200px;
            position: relative;
            z-index: 2;
            text-align: center;
            background: var(--bg-white);
            padding: 20px;
            border-radius: var(--radius-md);
            box-shadow: 0 4px 10px rgba(0,0,0,0.02);
            border: 1px solid var(--border-color);
        }
        .step-num {
            width: 50px;
            height: 50px;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: #fff;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 1.2rem;
            margin: 0 auto 20px auto;
            border: 4px solid var(--bg-white);
            box-shadow: 0 4px 10px rgba(0,102,255,0.2);
        }
        .timeline-step h3 {
            font-size: 1.1rem;
            margin-bottom: 8px;
            color: #0f172a;
        }
        .timeline-step p {
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        /* 对比评测 & Token比价 */
        .comparison-wrapper {
            background: var(--bg-white);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-color);
            box-shadow: 0 10px 30px rgba(0,0,0,0.03);
            overflow: hidden;
        }
        .rating-banner {
            background: linear-gradient(135deg, #0f172a, #1e293b);
            color: #fff;
            padding: 30px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 20px;
        }
        .rating-info {
            display: flex;
            align-items: center;
            gap: 20px;
        }
        .rating-score {
            font-size: 3rem;
            font-weight: 900;
            color: var(--secondary);
            line-height: 1;
        }
        .rating-stars {
            color: #ffb800;
            font-size: 1.5rem;
        }
        .rating-text h4 {
            font-size: 1.2rem;
            margin-bottom: 4px;
        }
        .rating-text p {
            color: #94a3b8;
            font-size: 0.85rem;
        }
        .table-responsive {
            width: 100%;
            overflow-x: auto;
        }
        table.compare-table {
            width: 100%;
            border-collapse: collapse;
            text-align: left;
            min-width: 800px;
        }
        .compare-table th, .compare-table td {
            padding: 16px 24px;
            border-bottom: 1px solid var(--border-color);
            font-size: 0.95rem;
        }
        .compare-table th {
            background: var(--bg-light);
            font-weight: 700;
            color: #0f172a;
        }
        .compare-table tr:hover {
            background: rgba(0,102,255,0.01);
        }
        .highlight-cell {
            background-color: rgba(0, 102, 255, 0.03);
            font-weight: 600;
            color: var(--primary);
        }

        /* 培训板块 */
        .training-grid {
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            gap: 20px;
        }
        .training-card {
            background: var(--bg-white);
            border: 1px solid var(--border-color);
            padding: 24px;
            border-radius: var(--radius-lg);
            text-align: center;
            transition: var(--transition);
        }
        .training-card:hover {
            border-color: var(--accent);
            transform: translateY(-5px);
            box-shadow: 0 10px 25px rgba(255, 106, 0, 0.08);
        }
        .training-badge {
            background: rgba(255, 106, 0, 0.1);
            color: var(--accent);
            font-size: 0.75rem;
            font-weight: 700;
            padding: 4px 10px;
            border-radius: 30px;
            display: inline-block;
            margin-bottom: 16px;
        }
        .training-card h3 {
            font-size: 1.05rem;
            margin-bottom: 10px;
            color: #0f172a;
            height: 50px;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .training-card p {
            font-size: 0.8rem;
            color: var(--text-muted);
        }

        /* 客户案例中心 */
        .case-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }
        .case-card {
            background: var(--bg-white);
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .case-card:hover {
            transform: translateY(-8px);
            box-shadow: 0 15px 35px rgba(0,0,0,0.06);
        }
        .case-img-container {
            height: 200px;
            overflow: hidden;
        }
        .case-img-container img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition);
        }
        .case-card:hover .case-img-container img {
            transform: scale(1.05);
        }
        .case-body {
            padding: 24px;
        }
        .case-tag {
            font-size: 0.75rem;
            color: var(--primary);
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 0.5px;
            margin-bottom: 8px;
            display: inline-block;
        }
        .case-body h3 {
            font-size: 1.15rem;
            margin-bottom: 10px;
            color: #0f172a;
        }
        .case-body p {
            color: var(--text-muted);
            font-size: 0.85rem;
        }

        /* 客户评论 */
        .testimonial-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }
        .testimonial-card {
            background: var(--bg-white);
            border: 1px solid var(--border-color);
            padding: 30px;
            border-radius: var(--radius-lg);
            box-shadow: 0 4px 15px rgba(0,0,0,0.01);
            position: relative;
        }
        .quote-icon {
            font-size: 3rem;
            color: var(--primary-light);
            position: absolute;
            top: 15px;
            right: 25px;
            line-height: 1;
            font-family: Georgia, serif;
        }
        .testimonial-content {
            font-size: 0.95rem;
            color: var(--text-main);
            margin-bottom: 20px;
            position: relative;
            z-index: 2;
        }
        .testimonial-user {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .user-avatar-placeholder {
            width: 45px;
            height: 45px;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-weight: bold;
            font-size: 1.1rem;
        }
        .user-info h4 {
            font-size: 0.95rem;
            color: #0f172a;
        }
        .user-info p {
            font-size: 0.8rem;
            color: var(--text-muted);
        }

        /* 常见用户问题 FAQ & 自助排查 & 术语 */
        .faq-block {
            max-width: 800px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            margin-bottom: 12px;
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: var(--primary);
        }
        .faq-trigger {
            padding: 18px 24px;
            width: 100%;
            text-align: left;
            background: none;
            border: none;
            font-size: 1.05rem;
            font-weight: 600;
            color: #0f172a;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .faq-arrow {
            transition: var(--transition);
            font-size: 0.8rem;
        }
        .faq-content {
            padding: 0 24px;
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease-out, padding 0.3s ease-out;
            color: var(--text-muted);
            font-size: 0.95rem;
            border-top: 0px solid var(--border-color);
        }
        .faq-item.active .faq-content {
            padding: 16px 24px 24px 24px;
            max-height: 300px;
            border-top-width: 1px;
        }
        .faq-item.active .faq-arrow {
            transform: rotate(180deg);
        }

        /* AI 术语百科与排查工具区 */
        .support-tools {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 30px;
            margin-top: 50px;
        }
        .tool-box {
            background: var(--bg-white);
            border: 1px solid var(--border-color);
            padding: 30px;
            border-radius: var(--radius-lg);
        }
        .tool-box h3 {
            font-size: 1.25rem;
            margin-bottom: 16px;
            color: #0f172a;
            border-left: 4px solid var(--primary);
            padding-left: 12px;
        }
        .term-list {
            list-style: none;
        }
        .term-list li {
            margin-bottom: 12px;
            font-size: 0.9rem;
        }
        .term-list strong {
            color: var(--primary);
        }

        /* 行业资讯 & 最新文章 */
        .articles-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }
        .article-card {
            background: var(--bg-white);
            border: 1px solid var(--border-color);
            padding: 24px;
            border-radius: var(--radius-lg);
            transition: var(--transition);
        }
        .article-card:hover {
            border-color: var(--primary);
            box-shadow: 0 8px 25px rgba(0,102,255,0.04);
        }
        .article-date {
            font-size: 0.8rem;
            color: var(--text-muted);
            margin-bottom: 10px;
        }
        .article-card h3 {
            font-size: 1.1rem;
            margin-bottom: 14px;
            line-height: 1.4;
        }
        .article-card h3 a {
            color: #0f172a;
        }
        .article-card h3 a:hover {
            color: var(--primary);
        }

        /* 表单与需求匹配 */
        .form-section {
            background: linear-gradient(135deg, rgba(0, 102, 255, 0.02) 0%, rgba(0, 242, 254, 0.02) 100%), var(--bg-white);
        }
        .contact-grid {
            display: grid;
            grid-template-columns: 1.1fr 0.9fr;
            gap: 50px;
        }
        .form-container {
            background: var(--bg-white);
            border: 1px solid var(--border-color);
            padding: 40px;
            border-radius: var(--radius-lg);
            box-shadow: 0 15px 40px rgba(0,0,0,0.03);
        }
        .form-group {
            margin-bottom: 20px;
        }
        .form-group label {
            display: block;
            font-size: 0.9rem;
            font-weight: 600;
            margin-bottom: 8px;
            color: #334155;
        }
        .form-control {
            width: 100%;
            padding: 12px 16px;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            font-size: 0.95rem;
            transition: var(--transition);
        }
        .form-control:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(0, 102, 255, 0.1);
        }
        textarea.form-control {
            resize: vertical;
            min-height: 120px;
        }
        .form-submit-btn {
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: #fff;
            border: none;
            width: 100%;
            padding: 14px;
            border-radius: var(--radius-md);
            font-weight: 700;
            font-size: 1.05rem;
            cursor: pointer;
            transition: var(--transition);
            box-shadow: 0 4px 15px rgba(0, 102, 255, 0.2);
        }
        .form-submit-btn:hover {
            box-shadow: 0 6px 20px rgba(0, 102, 255, 0.3);
            transform: translateY(-2px);
        }
        
        .contact-info-panel {
            padding: 20px 0;
        }
        .info-item {
            display: flex;
            align-items: flex-start;
            gap: 16px;
            margin-bottom: 30px;
        }
        .info-icon {
            width: 44px;
            height: 44px;
            background: var(--primary-light);
            color: var(--primary);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: bold;
            flex-shrink: 0;
        }
        .info-text h4 {
            font-size: 1rem;
            margin-bottom: 4px;
            color: #0f172a;
        }
        .info-text p {
            color: var(--text-muted);
            font-size: 0.95rem;
        }
        .qr-codes {
            display: flex;
            gap: 20px;
            margin-top: 30px;
            flex-wrap: wrap;
        }
        .qr-card {
            background: var(--bg-white);
            border: 1px solid var(--border-color);
            padding: 16px;
            border-radius: var(--radius-md);
            text-align: center;
            width: 140px;
        }
        .qr-card img {
            width: 100%;
            margin-bottom: 8px;
            border-radius: 4px;
        }
        .qr-card span {
            font-size: 0.75rem;
            color: var(--text-muted);
            font-weight: 600;
        }

        /* 友情链接与页脚 */
        footer {
            background-color: #0f172a;
            color: #94a3b8;
            padding: 60px 0 30px 0;
            font-size: 0.9rem;
            border-top: 1px solid #1e293b;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand h3 {
            color: #fff;
            margin-bottom: 16px;
            font-size: 1.25rem;
        }
        .footer-brand p {
            margin-bottom: 20px;
            line-height: 1.6;
        }
        .footer-links-col h4 {
            color: #fff;
            margin-bottom: 16px;
            font-size: 1rem;
        }
        .footer-links-col ul {
            list-style: none;
        }
        .footer-links-col ul li {
            margin-bottom: 10px;
        }
        .footer-links-col ul li a {
            color: #94a3b8;
        }
        .footer-links-col ul li a:hover {
            color: #fff;
        }
        
        .friendship-links {
            border-top: 1px solid #1e293b;
            padding-top: 20px;
            margin-bottom: 20px;
            display: flex;
            flex-wrap: wrap;
            gap: 15px;
            align-items: center;
        }
        .friendship-links span {
            font-weight: 600;
            color: #cbd5e1;
        }
        .friendship-links a {
            color: #64748b;
            font-size: 0.85rem;
        }
        .friendship-links a:hover {
            color: var(--secondary);
        }

        .footer-bottom {
            border-top: 1px solid #1e293b;
            padding-top: 20px;
            text-align: center;
            font-size: 0.8rem;
            color: #64748b;
        }

        /* 浮动客服入口 */
        .float-contact {
            position: fixed;
            right: 30px;
            bottom: 30px;
            z-index: 999;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .float-btn {
            width: 50px;
            height: 50px;
            background: var(--primary);
            color: #fff;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 4px 15px rgba(0, 102, 255, 0.3);
            cursor: pointer;
            position: relative;
            transition: var(--transition);
        }
        .float-btn:hover {
            transform: scale(1.1);
            background: var(--accent);
        }
        .float-btn .tooltip {
            position: absolute;
            right: 60px;
            background: #fff;
            color: var(--text-main);
            padding: 8px 12px;
            border-radius: var(--radius-md);
            font-size: 0.8rem;
            white-space: nowrap;
            box-shadow: 0 4px 15px rgba(0,0,0,0.1);
            opacity: 0;
            pointer-events: none;
            transition: var(--transition);
            border: 1px solid var(--border-color);
        }
        .float-btn:hover .tooltip {
            opacity: 1;
        }
        .float-btn .tooltip img {
            width: 120px;
            height: auto;
            margin-top: 5px;
            display: block;
        }

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

        @media (max-width: 768px) {
            section {
                padding: 50px 0;
            }
            .menu-toggle {
                display: block;
            }
            .nav-links {
                position: absolute;
                top: 70px;
                left: 0;
                right: 0;
                background: #fff;
                flex-direction: column;
                padding: 20px;
                border-bottom: 1px solid var(--border-color);
                box-shadow: 0 10px 20px rgba(0,0,0,0.05);
                display: none;
            }
            .nav-links.active {
                display: flex;
            }
            h1.hero-title {
                font-size: 2.2rem;
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .intro-grid, .solutions-grid, .contact-grid, .support-tools, .footer-grid {
                grid-template-columns: 1fr;
            }
            .solution-box {
                flex-direction: column;
            }
            .solution-img-wrapper {
                width: 100%;
                height: 180px;
            }
            .services-grid, .case-grid, .testimonial-grid {
                grid-template-columns: 1fr;
            }
            .training-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .timeline::before {
                display: none;
            }
            .timeline-step {
                min-width: 100%;
            }
        }