/* 基础变量定义 - 高饱和艳彩风 (浅色底，醒目霓虹点缀) */
        :root {
            --primary: #6366f1; /* 极具科技感的亮靛蓝 */
            --secondary: #ff007a; /* 醒目的高饱和霓虹粉 */
            --accent: #00f0ff; /* 荧光青色 */
            --dark: #0f172a; /* 深 slate 灰，作主文字色 */
            --light-bg: #f8fafc; /* 主页面背景 */
            --card-bg: #ffffff; /* 卡片背景 */
            --text-muted: #64748b; /* 次要文字 */
            --border: #e2e8f0;
            --gradient-primary: linear-gradient(135deg, #6366f1 0%, #ff007a 100%);
            --gradient-accent: linear-gradient(135deg, #00f0ff 0%, #6366f1 100%);
            --shadow: 0 10px 30px -10px rgba(99, 102, 241, 0.15);
            --shadow-hover: 0 20px 40px -15px rgba(255, 0, 122, 0.25);
            --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
        }

        /* 基础样式重置 */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }

        body {
            font-family: var(--font);
            background-color: var(--light-bg);
            color: var(--dark);
            line-height: 1.6;
            overflow-x: hidden;
        }

        /* 主容器规范 */
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        /* 辅助元素与通用组件 */
        section {
            padding: 80px 0;
            position: relative;
        }

        .section-header {
            text-align: center;
            margin-bottom: 60px;
        }

        .section-title {
            font-size: 2.25rem;
            font-weight: 800;
            color: var(--dark);
            margin-bottom: 15px;
            position: relative;
            display: inline-block;
        }

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

        .section-subtitle {
            font-size: 1.1rem;
            color: var(--text-muted);
            max-width: 700px;
            margin: 0 auto;
        }

        /* 按钮设计 */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 12px 28px;
            border-radius: 50px;
            font-weight: 600;
            text-decoration: none;
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            cursor: pointer;
            border: none;
            font-size: 1rem;
        }

        .btn-primary {
            background: var(--gradient-primary);
            color: white;
            box-shadow: 0 4px 15px rgba(255, 0, 122, 0.3);
        }

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

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

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

        /* 顶部导航 */
        header {
            background-color: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            box-shadow: 0 2px 20px rgba(0,0,0,0.05);
            transition: all 0.3s ease;
        }

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

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

        .logo-area img {
            max-height: 40px;
            width: auto;
        }

        .nav-menu {
            display: flex;
            align-items: center;
            list-style: none;
            gap: 25px;
        }

        .nav-menu a {
            text-decoration: none;
            color: var(--dark);
            font-weight: 500;
            font-size: 0.95rem;
            transition: color 0.3s ease;
        }

        .nav-menu a:hover {
            color: var(--secondary);
        }

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

        .mobile-nav-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            cursor: pointer;
            color: var(--dark);
        }

        /* Hero首屏：无图片，采用几何感与高饱和渐变网格背景 */
        .hero {
            padding-top: 150px;
            padding-bottom: 100px;
            background: radial-gradient(circle at 80% 20%, rgba(255, 0, 122, 0.08) 0%, rgba(99, 102, 241, 0.08) 50%, rgba(248, 250, 252, 1) 100%), linear-gradient(180deg, #ffffff 0%, #f1f5f9 100%);
            position: relative;
            overflow: hidden;
        }

        .hero::before {
            content: '';
            position: absolute;
            top: 10%;
            left: -10%;
            width: 300px;
            height: 300px;
            background: var(--gradient-primary);
            filter: blur(150px);
            opacity: 0.15;
            border-radius: 50%;
            pointer-events: none;
        }

        .hero-content {
            text-align: center;
            max-width: 900px;
            margin: 0 auto;
            z-index: 2;
            position: relative;
        }

        .hero-title-badge {
            display: inline-block;
            background: rgba(99, 102, 241, 0.1);
            color: var(--primary);
            padding: 6px 18px;
            border-radius: 30px;
            font-size: 0.85rem;
            font-weight: 700;
            margin-bottom: 20px;
            letter-spacing: 1px;
            text-transform: uppercase;
        }

        .hero-title {
            font-size: 3rem;
            line-height: 1.2;
            font-weight: 900;
            color: var(--dark);
            margin-bottom: 25px;
            letter-spacing: -0.5px;
        }

        .hero-title span {
            color: var(--secondary);
        }

        .hero-desc {
            font-size: 1.25rem;
            color: var(--text-muted);
            margin-bottom: 40px;
            line-height: 1.6;
        }

        .hero-btns {
            display: flex;
            justify-content: center;
            gap: 20px;
            margin-bottom: 50px;
        }

        /* 核心数据卡片 */
        .hero-stats {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            margin-top: 30px;
        }

        .stat-card {
            background-color: var(--card-bg);
            padding: 25px 20px;
            border-radius: 16px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
            text-align: center;
            transition: all 0.3s ease;
        }

        .stat-card:hover {
            transform: translateY(-5px);
            border-color: var(--primary);
        }

        .stat-value {
            font-size: 2.25rem;
            font-weight: 800;
            color: var(--primary);
            margin-bottom: 5px;
        }

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

        /* 平台介绍 / 软件介绍 */
        .about-section {
            background-color: var(--card-bg);
            border-bottom: 1px solid var(--border);
        }

        .about-grid {
            display: grid;
            grid-template-columns: 1.1fr 0.9fr;
            gap: 50px;
            align-items: center;
        }

        .about-text h3 {
            font-size: 1.8rem;
            font-weight: 700;
            margin-bottom: 20px;
            color: var(--dark);
        }

        .about-text p {
            color: var(--text-muted);
            margin-bottom: 20px;
            font-size: 1.05rem;
        }

        .about-features {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
            margin-top: 30px;
        }

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

        .about-feat-icon {
            color: var(--secondary);
            font-weight: bold;
            font-size: 1.2rem;
        }

        .about-feat-content h4 {
            font-weight: 600;
            font-size: 1rem;
            margin-bottom: 4px;
        }

        .about-feat-content p {
            font-size: 0.85rem;
            color: var(--text-muted);
            margin: 0;
        }

        /* 服务体系 & 模型支持 */
        .services-section {
            background-color: var(--light-bg);
        }

        .model-cloud {
            background: #ffffff;
            border-radius: 20px;
            padding: 40px;
            box-shadow: var(--shadow);
            margin-top: 40px;
            border: 1px solid var(--border);
        }

        .model-cloud-title {
            text-align: center;
            font-size: 1.25rem;
            font-weight: 700;
            margin-bottom: 25px;
            color: var(--dark);
        }

        .cloud-tags {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 12px;
        }

        .cloud-tag {
            background: var(--light-bg);
            color: var(--dark);
            padding: 8px 16px;
            border-radius: 50px;
            font-size: 0.9rem;
            font-weight: 600;
            border: 1px solid var(--border);
            transition: all 0.2s ease;
        }

        .cloud-tag:hover {
            background: var(--gradient-primary);
            color: white;
            border-color: transparent;
            transform: scale(1.05);
        }

        /* 自动化制作流程 */
        .process-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 30px;
            margin-top: 40px;
        }

        .process-card {
            background: white;
            border-radius: 16px;
            padding: 30px 20px;
            border: 1px solid var(--border);
            text-align: center;
            position: relative;
            box-shadow: var(--shadow);
        }

        .process-step {
            position: absolute;
            top: -20px;
            left: 50%;
            transform: translateX(-50%);
            width: 40px;
            height: 40px;
            background: var(--gradient-primary);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            box-shadow: 0 4px 10px rgba(255, 0, 122, 0.3);
        }

        .process-card h3 {
            margin-top: 15px;
            margin-bottom: 12px;
            font-size: 1.2rem;
            font-weight: 700;
        }

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

        /* 解决方案 */
        .solutions-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
            margin-top: 45px;
        }

        .solution-card {
            background: var(--card-bg);
            border-radius: 16px;
            overflow: hidden;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
            transition: all 0.3s ease;
        }

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

        .solution-header {
            background: var(--gradient-primary);
            color: white;
            padding: 25px;
            font-weight: 700;
            font-size: 1.25rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .solution-body {
            padding: 30px;
        }

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

        .solution-body li {
            margin-bottom: 12px;
            font-size: 0.95rem;
            color: var(--dark);
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .solution-body li::before {
            content: "✓";
            color: var(--primary);
            font-weight: bold;
        }

        /* 全国网络与标准化流程合并版 */
        .network-section {
            background: #ffffff;
        }

        .network-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
            align-items: center;
        }

        .network-map-visual {
            background: var(--light-bg);
            border-radius: 20px;
            padding: 40px;
            border: 1px solid var(--border);
            text-align: center;
        }

        .timeline {
            position: relative;
            padding-left: 30px;
            border-left: 2px solid var(--border);
        }

        .timeline-item {
            position: relative;
            margin-bottom: 30px;
        }

        .timeline-item::before {
            content: '';
            position: absolute;
            left: -37px;
            top: 5px;
            width: 12px;
            height: 12px;
            border-radius: 50%;
            background: var(--secondary);
            border: 2px solid white;
        }

        .timeline-time {
            font-size: 0.8rem;
            color: var(--primary);
            font-weight: 700;
            margin-bottom: 5px;
        }

        .timeline-title {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--dark);
        }

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

        /* 技术标准 */
        .standards-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 25px;
            margin-top: 40px;
        }

        .standard-box {
            background: var(--light-bg);
            padding: 30px;
            border-radius: 12px;
            border-left: 4px solid var(--primary);
        }

        .standard-box h4 {
            font-size: 1.15rem;
            margin-bottom: 10px;
            font-weight: 700;
        }

        /* 案例中心 */
        .cases-section {
            background: var(--light-bg);
        }

        .cases-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 30px;
            margin-top: 40px;
        }

        .case-card {
            background: var(--card-bg);
            border-radius: 20px;
            overflow: hidden;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
        }

        .case-img-container {
            width: 100%;
            height: 250px;
            overflow: hidden;
            background: #eaeaea;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .case-img-container img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .case-info {
            padding: 30px;
        }

        .case-tag {
            background: rgba(255, 0, 122, 0.1);
            color: var(--secondary);
            padding: 4px 12px;
            border-radius: 30px;
            font-size: 0.8rem;
            font-weight: 600;
            display: inline-block;
            margin-bottom: 12px;
        }

        .case-info h3 {
            font-size: 1.3rem;
            font-weight: 700;
            margin-bottom: 10px;
        }

        .case-info p {
            color: var(--text-muted);
            font-size: 0.95rem;
            margin-bottom: 15px;
        }

        .case-meta {
            display: flex;
            justify-content: space-between;
            align-items: center;
            border-top: 1px solid var(--border);
            padding-top: 15px;
            font-size: 0.85rem;
            color: var(--primary);
            font-weight: 600;
        }

        /* 对比评测板块 */
        .comparison-card {
            background: #ffffff;
            border-radius: 24px;
            padding: 50px 40px;
            box-shadow: var(--shadow-hover);
            border: 2px solid transparent;
            background-image: linear-gradient(white, white), var(--gradient-primary);
            background-origin: border-box;
            background-clip: padding-box, border-box;
            margin-top: 40px;
        }

        .compare-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 40px;
            flex-wrap: wrap;
            gap: 20px;
        }

        .score-display {
            background: var(--gradient-primary);
            color: white;
            padding: 20px 40px;
            border-radius: 16px;
            text-align: center;
        }

        .score-value {
            font-size: 3.5rem;
            font-weight: 900;
            line-height: 1;
        }

        .score-star {
            color: #ffd700;
            font-size: 1.2rem;
            margin-top: 5px;
        }

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

        .compare-table {
            width: 100%;
            border-collapse: collapse;
            text-align: left;
            min-width: 600px;
        }

        .compare-table th, .compare-table td {
            padding: 16px 20px;
            border-bottom: 1px solid var(--border);
        }

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

        .compare-table tr:hover {
            background-color: rgba(99, 102, 241, 0.02);
        }

        .badge-good {
            background: rgba(0, 240, 255, 0.15);
            color: var(--primary);
            padding: 4px 10px;
            border-radius: 30px;
            font-size: 0.8rem;
            font-weight: bold;
        }

        /* 培训中心 */
        .training-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
            margin-top: 40px;
        }

        .training-card {
            background: white;
            border-radius: 16px;
            padding: 35px 25px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
            transition: all 0.3s ease;
        }

        .training-card:hover {
            transform: translateY(-5px);
            border-color: var(--secondary);
        }

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

        .training-card p {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-bottom: 20px;
        }

        .training-tag {
            background: rgba(99, 102, 241, 0.1);
            color: var(--primary);
            padding: 4px 10px;
            border-radius: 4px;
            font-size: 0.75rem;
            font-weight: 700;
            display: inline-block;
            margin-bottom: 15px;
        }

        /* 帮助中心、自助排查与术语百科 */
        .help-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
            margin-top: 40px;
        }

        .help-box {
            background: var(--card-bg);
            border-radius: 16px;
            padding: 30px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
        }

        .help-box h3 {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 15px;
            border-bottom: 2px solid var(--primary);
            padding-bottom: 10px;
        }

        .help-list {
            list-style: none;
        }

        .help-list li {
            margin-bottom: 12px;
            font-size: 0.9rem;
        }

        .help-list a {
            color: var(--dark);
            text-decoration: none;
            transition: color 0.2s ease;
        }

        .help-list a:hover {
            color: var(--secondary);
        }

        /* FAQ 板块 */
        .faq-grid {
            max-width: 800px;
            margin: 40px auto 0;
            display: flex;
            flex-direction: column;
            gap: 15px;
        }

        .faq-item {
            background: white;
            border-radius: 12px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
            overflow: hidden;
            transition: all 0.3s ease;
        }

        .faq-question {
            padding: 20px 25px;
            font-weight: 600;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            background: white;
            user-select: none;
        }

        .faq-answer {
            padding: 0 25px;
            max-height: 0;
            overflow: hidden;
            transition: all 0.3s cubic-bezier(0, 1, 0, 1);
            color: var(--text-muted);
            font-size: 0.95rem;
            border-top: 1px solid transparent;
        }

        .faq-item.active .faq-answer {
            padding: 20px 25px;
            max-height: 1000px;
            border-top: 1px solid var(--border);
        }

        .faq-icon::before {
            content: "+";
            font-weight: bold;
            font-size: 1.2rem;
            color: var(--primary);
        }

        .faq-item.active .faq-icon::before {
            content: "−";
        }

        /* 客户评论 */
        .reviews-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
            margin-top: 40px;
        }

        .review-card {
            background: white;
            border-radius: 16px;
            padding: 30px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
            position: relative;
        }

        .review-quote {
            color: var(--text-muted);
            font-size: 0.95rem;
            margin-bottom: 20px;
            font-style: italic;
        }

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

        .author-avatar {
            width: 45px;
            height: 45px;
            background: var(--gradient-primary);
            color: white;
            font-weight: 700;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .author-info h4 {
            font-size: 0.95rem;
            font-weight: 700;
        }

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

        /* 资讯与知识库 */
        .articles-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
            margin-top: 40px;
        }

        .article-card {
            background: white;
            border-radius: 16px;
            padding: 30px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
            transition: all 0.3s ease;
        }

        .article-card:hover {
            transform: translateY(-5px);
            border-color: var(--primary);
        }

        .article-card h3 {
            font-size: 1.15rem;
            margin-bottom: 12px;
            font-weight: 700;
            line-height: 1.4;
        }

        .article-card a {
            color: var(--dark);
            text-decoration: none;
        }

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

        /* 智能需求匹配与表单 */
        .contact-section {
            background: radial-gradient(circle at 10% 90%, rgba(99, 102, 241, 0.05) 0%, rgba(255, 0, 122, 0.05) 100%), var(--card-bg);
        }

        .contact-grid {
            display: grid;
            grid-template-columns: 1fr 1.2fr;
            gap: 50px;
            align-items: stretch;
        }

        .contact-info-panel {
            background: var(--gradient-primary);
            border-radius: 20px;
            padding: 40px;
            color: white;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .info-header h3 {
            font-size: 1.8rem;
            font-weight: 800;
            margin-bottom: 15px;
        }

        .info-list {
            margin: 40px 0;
            list-style: none;
        }

        .info-list li {
            margin-bottom: 20px;
            display: flex;
            align-items: center;
            gap: 15px;
            font-size: 1rem;
        }

        .info-qr {
            text-align: center;
            background: rgba(255,255,255,0.1);
            border-radius: 12px;
            padding: 20px;
            display: inline-block;
        }

        .info-qr img {
            width: 130px;
            height: 130px;
            border-radius: 8px;
            margin-bottom: 8px;
            background: white;
        }

        .form-panel {
            background: white;
            border-radius: 20px;
            padding: 40px;
            border: 1px solid var(--border);
            box-shadow: var(--shadow);
        }

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

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

        .form-control {
            width: 100%;
            padding: 12px 15px;
            border-radius: 8px;
            border: 1px solid var(--border);
            background-color: var(--light-bg);
            transition: all 0.3s ease;
            font-family: inherit;
        }

        .form-control:focus {
            outline: none;
            border-color: var(--primary);
            background-color: white;
            box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
        }

        /* 友情链接与页脚 */
        footer {
            background-color: #0b0f19;
            color: #94a3b8;
            padding: 60px 0 30px;
            border-top: 1px solid #1e293b;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1.5fr;
            gap: 40px;
            margin-bottom: 40px;
        }

        .footer-brand h4 {
            color: white;
            font-size: 1.3rem;
            margin-bottom: 15px;
            font-weight: 800;
        }

        .footer-links h5 {
            color: white;
            font-size: 1rem;
            margin-bottom: 15px;
            font-weight: 700;
        }

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

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

        .footer-links-list a {
            color: #94a3b8;
            text-decoration: none;
            font-size: 0.9rem;
            transition: color 0.2s ease;
        }

        .footer-links-list a:hover {
            color: white;
        }

        .friend-links {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            margin-top: 15px;
        }

        .friend-links a {
            color: #64748b;
            text-decoration: none;
            font-size: 0.85rem;
            transition: color 0.2s ease;
        }

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

        .footer-bottom {
            border-top: 1px solid #1e293b;
            padding-top: 30px;
            text-align: center;
            font-size: 0.85rem;
        }

        /* 浮动客服入口 */
        .float-contact {
            position: fixed;
            bottom: 30px;
            right: 30px;
            z-index: 999;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .float-btn {
            width: 50px;
            height: 50px;
            border-radius: 50%;
            background: var(--gradient-primary);
            color: white;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 4px 15px rgba(255, 0, 122, 0.3);
            cursor: pointer;
            position: relative;
            transition: transform 0.3s ease;
        }

        .float-btn:hover {
            transform: scale(1.1);
        }

        .float-btn-text {
            font-size: 0.8rem;
            font-weight: 700;
            text-align: center;
            line-height: 1.1;
        }

        .qr-popover {
            position: absolute;
            bottom: 60px;
            right: 0;
            background: white;
            border: 1px solid var(--border);
            padding: 15px;
            border-radius: 12px;
            box-shadow: var(--shadow-hover);
            display: none;
            width: 160px;
            text-align: center;
        }

        .qr-popover img {
            width: 100%;
            height: auto;
            border-radius: 6px;
        }

        .qr-popover p {
            font-size: 0.75rem;
            color: var(--dark);
            margin-top: 8px;
            font-weight: 600;
        }

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

        /* 响应式媒体查询 */
        @media (max-width: 1024px) {
            .hero-stats {
                grid-template-columns: repeat(2, 1fr);
            }
            .about-grid, .network-grid, .contact-grid {
                grid-template-columns: 1fr;
                gap: 30px;
            }
            .solutions-grid, .training-grid, .help-grid, .reviews-grid, .articles-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .process-grid, .standards-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            html {
                font-size: 14px;
            }
            .nav-menu {
                display: none;
                position: absolute;
                top: 70px;
                left: 0;
                right: 0;
                background: white;
                flex-direction: column;
                padding: 20px;
                border-top: 1px solid var(--border);
                box-shadow: 0 10px 15px rgba(0,0,0,0.05);
            }
            .nav-menu.active {
                display: flex;
            }
            .mobile-nav-toggle {
                display: block;
            }
            .hero-title {
                font-size: 2.2rem;
            }
            .hero-btns {
                flex-direction: column;
                align-items: center;
            }
            .solutions-grid, .training-grid, .help-grid, .reviews-grid, .articles-grid, .cases-grid, .process-grid, .standards-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
            .hero-stats {
                grid-template-columns: repeat(2, 1fr);
            }
        }