:root {
            --primary: #22c55e;
            --primary-dark: #16a34a;
            --primary-light: #f0fdf4;
            --secondary: #0f172a;
            --text-main: #1e293b;
            --text-muted: #64748b;
            --bg-light: #f8fafc;
            --bg-white: #ffffff;
            --border-color: #e2e8f0;
            --container-max: 1200px;
            --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
            --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.08);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

        * {
            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;
            color: var(--text-main);
            background-color: var(--bg-light);
        }

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

        /* 布局容器 */
        .container {
            width: 100%;
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 20px;
        }

        section {
            padding: 80px 0;
            background-color: var(--bg-white);
            border-bottom: 1px solid var(--border-color);
        }

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

        /* 标题规范 */
        .section-header {
            text-align: center;
            margin-bottom: 50px;
        }

        .section-header h2 {
            font-size: 2rem;
            color: var(--secondary);
            font-weight: 800;
            margin-bottom: 15px;
            position: relative;
            display: inline-block;
        }

        .section-header h2::after {
            content: '';
            display: block;
            width: 50px;
            height: 4px;
            background: var(--primary);
            margin: 8px auto 0;
            border-radius: 2px;
        }

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

        /* 按钮样式 */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 12px 28px;
            border-radius: 8px;
            font-weight: 600;
            font-size: 1rem;
            transition: var(--transition);
            cursor: pointer;
            text-decoration: none;
        }

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

        .btn-primary:hover {
            background-color: var(--primary-dark);
            border-color: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 4px 12px rgba(34, 197, 94, 0.3);
        }

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

        .btn-outline:hover {
            background-color: var(--secondary);
            color: var(--bg-white);
            transform: translateY(-2px);
        }

        /* 导航栏 */
        header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            background-color: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            box-shadow: var(--shadow);
            z-index: 1000;
            border-bottom: 1px solid var(--border-color);
        }

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

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

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

        .logo-text {
            font-weight: 800;
            font-size: 1.3rem;
            color: var(--secondary);
        }

        .logo-text span {
            color: var(--primary);
        }

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

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

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

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

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

        /* 首页 Hero 区域 (无图片) */
        .hero-section {
            padding-top: 140px;
            padding-bottom: 100px;
            background: linear-gradient(135deg, var(--primary-light) 0%, #ffffff 100%);
            text-align: center;
            border-bottom: 1px solid var(--border-color);
        }

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

        .hero-badge {
            display: inline-block;
            background-color: rgba(34, 197, 94, 0.1);
            color: var(--primary-dark);
            padding: 6px 16px;
            border-radius: 50px;
            font-size: 0.9rem;
            font-weight: 700;
            margin-bottom: 25px;
            letter-spacing: 1px;
        }

        .hero-title {
            font-size: 2.8rem;
            line-height: 1.25;
            color: var(--secondary);
            font-weight: 800;
            margin-bottom: 25px;
        }

        .hero-title span {
            color: var(--primary);
            background: linear-gradient(to right, var(--primary), var(--primary-dark));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .hero-desc {
            font-size: 1.2rem;
            color: var(--text-muted);
            margin-bottom: 40px;
            line-height: 1.8;
        }

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

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

        .stat-card {
            background-color: var(--bg-white);
            border: 1px solid var(--border-color);
            padding: 25px;
            border-radius: 12px;
            box-shadow: var(--shadow);
            transition: var(--transition);
        }

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

        .stat-num {
            font-size: 2rem;
            font-weight: 800;
            color: var(--primary);
            margin-bottom: 5px;
        }

        .stat-label {
            font-size: 0.9rem;
            color: var(--text-muted);
            font-weight: 600;
        }

        /* 关于我们 & 平台介绍 */
        .about-grid {
            display: grid;
            grid-template-columns: 1.1fr 0.9fr;
            gap: 50px;
            align-items: center;
        }

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

        .about-text p {
            color: var(--text-main);
            margin-bottom: 20px;
            line-height: 1.8;
        }

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

        .features-list li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            margin-bottom: 15px;
            font-weight: 500;
        }

        .features-list li::before {
            content: "✓";
            color: var(--primary);
            font-weight: bold;
            font-size: 1.1rem;
        }

        .about-highlights {
            background: var(--bg-light);
            border: 1px solid var(--border-color);
            padding: 30px;
            border-radius: 15px;
        }

        .highlight-item {
            margin-bottom: 20px;
        }

        .highlight-item:last-child {
            margin-bottom: 0;
        }

        .highlight-title {
            font-weight: 700;
            color: var(--secondary);
            margin-bottom: 5px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .highlight-title::before {
            content: "";
            display: inline-block;
            width: 8px;
            height: 8px;
            background-color: var(--primary);
            border-radius: 50%;
        }

        .highlight-desc {
            font-size: 0.9rem;
            color: var(--text-muted);
            padding-left: 16px;
        }

        /* 全平台AIGC服务 (支持模型) */
        .models-box {
            background-color: var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: 16px;
            padding: 40px;
            box-shadow: var(--shadow);
        }

        .models-box h3 {
            text-align: center;
            margin-bottom: 30px;
            color: var(--secondary);
        }

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

        .tag-cloud span {
            background-color: var(--bg-light);
            border: 1px solid var(--border-color);
            color: var(--text-main);
            padding: 8px 18px;
            border-radius: 50px;
            font-size: 0.9rem;
            font-weight: 600;
            transition: var(--transition);
        }

        .tag-cloud span:hover {
            background-color: var(--primary-light);
            color: var(--primary-dark);
            border-color: var(--primary);
            transform: scale(1.05);
        }

        /* 一站式AIGC制作 (主打场景) */
        .scenes-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }

        .scene-card {
            background-color: var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 30px;
            box-shadow: var(--shadow);
            transition: var(--transition);
        }

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

        .scene-icon {
            width: 50px;
            height: 50px;
            background-color: var(--primary-light);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 20px;
            font-size: 1.5rem;
            color: var(--primary-dark);
        }

        .scene-title {
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--secondary);
            margin-bottom: 12px;
        }

        .scene-desc {
            color: var(--text-muted);
            font-size: 0.95rem;
            line-height: 1.6;
        }

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

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

        .solution-card:hover {
            background-color: var(--bg-white);
            border-color: var(--primary);
            box-shadow: var(--shadow-md);
        }

        .solution-number {
            font-size: 2.5rem;
            font-weight: 800;
            color: rgba(34, 197, 94, 0.2);
            line-height: 1;
        }

        .solution-content h4 {
            font-size: 1.2rem;
            color: var(--secondary);
            margin-bottom: 10px;
        }

        .solution-content p {
            color: var(--text-muted);
            font-size: 0.95rem;
        }

        /* 全国服务网络 */
        .network-section {
            background: linear-gradient(to bottom, #ffffff, var(--bg-light));
        }

        .network-map-placeholder {
            background-color: var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: 15px;
            padding: 40px;
            text-align: center;
            box-shadow: var(--shadow);
        }

        .network-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            margin-top: 30px;
        }

        .network-node {
            background-color: var(--bg-light);
            padding: 15px;
            border-radius: 8px;
            font-weight: 600;
            color: var(--secondary);
            border-left: 4px solid var(--primary);
        }

        /* 标准化AIGC流程 */
        .process-flow {
            display: flex;
            justify-content: space-between;
            gap: 20px;
            position: relative;
            margin-top: 40px;
        }

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

        .process-step {
            flex: 1;
            text-align: center;
            position: relative;
            z-index: 2;
        }

        .step-num {
            width: 60px;
            height: 60px;
            background-color: var(--primary);
            color: var(--bg-white);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            font-weight: 700;
            margin: 0 auto 20px;
            box-shadow: 0 0 0 8px rgba(34, 197, 94, 0.1);
        }

        .step-title {
            font-weight: 700;
            font-size: 1.1rem;
            color: var(--secondary);
            margin-bottom: 8px;
        }

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

        /* 技术标准 & Token比价参考 */
        .standards-container {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
        }

        .standards-card {
            background-color: var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 30px;
            box-shadow: var(--shadow);
        }

        .table-responsive {
            width: 100%;
            overflow-x: auto;
            margin-top: 20px;
        }

        table {
            width: 100%;
            border-collapse: collapse;
            text-align: left;
        }

        th, td {
            padding: 12px 15px;
            border-bottom: 1px solid var(--border-color);
            font-size: 0.9rem;
        }

        th {
            background-color: var(--bg-light);
            color: var(--secondary);
            font-weight: 700;
        }

        .text-green {
            color: var(--primary-dark);
            font-weight: 700;
        }

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

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

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

        .case-img-wrapper {
            position: relative;
            width: 100%;
            aspect-ratio: 16/10;
            background-color: #f1f5f9;
            overflow: hidden;
        }

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

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

        .case-info {
            padding: 25px;
        }

        .case-tag {
            display: inline-block;
            background-color: var(--primary-light);
            color: var(--primary-dark);
            padding: 4px 10px;
            border-radius: 4px;
            font-size: 0.8rem;
            font-weight: 600;
            margin-bottom: 12px;
        }

        .case-title {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--secondary);
            margin-bottom: 10px;
        }

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

        /* 对比评测 */
        .eval-box {
            background-color: var(--bg-white);
            border: 2px solid var(--primary);
            border-radius: 16px;
            padding: 45px;
            box-shadow: var(--shadow-md);
        }

        .eval-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            border-bottom: 1px solid var(--border-color);
            padding-bottom: 25px;
            margin-bottom: 30px;
        }

        .eval-rating {
            display: flex;
            align-items: center;
            gap: 15px;
        }

        .rating-stars {
            color: #fbbf24;
            font-size: 1.8rem;
        }

        .rating-score {
            font-size: 2.2rem;
            font-weight: 900;
            color: var(--secondary);
        }

        .rating-score span {
            font-size: 1.2rem;
            color: var(--text-muted);
            font-weight: 500;
        }

        .eval-grid {
            display: grid;
            grid-template-columns: 1.2fr 0.8fr;
            gap: 40px;
        }

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

        .eval-list li {
            margin-bottom: 15px;
            padding-left: 25px;
            position: relative;
        }

        .eval-list li::before {
            content: "✦";
            position: absolute;
            left: 0;
            color: var(--primary);
            font-weight: bold;
        }

        .eval-badge-box {
            background-color: var(--primary-light);
            border-radius: 12px;
            padding: 25px;
            border: 1px dashed var(--primary);
            text-align: center;
        }

        .eval-badge-title {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--primary-dark);
            margin-bottom: 10px;
        }

        /* 人工智能培训 & 职业技术培训 */
        .training-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 30px;
        }

        .training-card {
            background-color: var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 35px;
            box-shadow: var(--shadow);
            transition: var(--transition);
        }

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

        .training-card h3 {
            font-size: 1.4rem;
            color: var(--secondary);
            margin-bottom: 15px;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .training-card h3::before {
            content: "🎓";
        }

        .course-list {
            list-style: none;
            margin-top: 20px;
        }

        .course-list li {
            display: flex;
            justify-content: space-between;
            padding: 10px 0;
            border-bottom: 1px dashed var(--border-color);
            font-size: 0.95rem;
        }

        .course-list li span:first-child {
            font-weight: 600;
            color: var(--text-main);
        }

        .course-list li span:last-child {
            color: var(--primary-dark);
            font-weight: 700;
        }

        /* 客户评论卡片 (6条) */
        .comments-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 25px;
        }

        .comment-card {
            background-color: var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 25px;
            box-shadow: var(--shadow);
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .comment-text {
            font-size: 0.95rem;
            color: var(--text-main);
            margin-bottom: 20px;
            font-style: italic;
            line-height: 1.7;
        }

        .comment-author {
            display: flex;
            align-items: center;
            gap: 12px;
            border-top: 1px solid var(--border-color);
            padding-top: 15px;
        }

        .author-avatar {
            width: 40px;
            height: 40px;
            background-color: var(--primary-light);
            color: var(--primary-dark);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 1.1rem;
        }

        .author-info h5 {
            font-weight: 700;
            color: var(--secondary);
            font-size: 0.9rem;
        }

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

        /* 帮助中心, 自助排查, 术语百科 & FAQ */
        .help-layout {
            display: grid;
            grid-template-columns: 1.2fr 0.8fr;
            gap: 40px;
        }

        .faq-accordion {
            display: flex;
            flex-direction: column;
            gap: 15px;
        }

        .faq-item {
            border: 1px solid var(--border-color);
            border-radius: 8px;
            background-color: var(--bg-white);
            overflow: hidden;
            transition: var(--transition);
        }

        .faq-header {
            padding: 18px 24px;
            background-color: var(--bg-white);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-weight: 700;
            color: var(--secondary);
            user-select: none;
            transition: var(--transition);
        }

        .faq-header:hover {
            background-color: var(--primary-light);
            color: var(--primary-dark);
        }

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

        .faq-content {
            padding: 0 24px;
            max-height: 0;
            overflow: hidden;
            transition: max-height 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: 18px 24px;
            max-height: 300px;
            border-top: 1px solid var(--border-color);
        }

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

        .sidebar-card {
            background-color: var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 25px;
            box-shadow: var(--shadow);
            margin-bottom: 25px;
        }

        .sidebar-card:last-child {
            margin-bottom: 0;
        }

        .sidebar-card h4 {
            font-size: 1.15rem;
            color: var(--secondary);
            margin-bottom: 15px;
            border-left: 4px solid var(--primary);
            padding-left: 10px;
        }

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

        .trouble-list li {
            padding: 8px 0;
            border-bottom: 1px solid var(--bg-light);
            font-size: 0.9rem;
        }

        .glossary-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }

        .glossary-tags span {
            font-size: 0.8rem;
            background-color: var(--bg-light);
            padding: 4px 10px;
            border-radius: 4px;
            color: var(--text-main);
            border: 1px solid var(--border-color);
        }

        /* 资讯 & 知识库 */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            gap: 20px;
        }

        .news-card {
            background-color: var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: 8px;
            padding: 20px;
            box-shadow: var(--shadow);
            transition: var(--transition);
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

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

        .news-title {
            font-size: 0.95rem;
            font-weight: 700;
            color: var(--secondary);
            margin-bottom: 15px;
            line-height: 1.5;
        }

        .news-link {
            font-size: 0.85rem;
            color: var(--primary-dark);
            text-decoration: none;
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 5px;
        }

        .news-link:hover {
            text-decoration: underline;
        }

        /* 智能需求匹配与表单板块 */
        .contact-layout {
            display: grid;
            grid-template-columns: 1.12fr 0.88fr;
            gap: 50px;
        }

        .form-box {
            background-color: var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: 16px;
            padding: 40px;
            box-shadow: var(--shadow-md);
        }

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

        .form-group label {
            display: block;
            font-weight: 700;
            color: var(--secondary);
            margin-bottom: 8px;
            font-size: 0.9rem;
        }

        .form-control {
            width: 100%;
            padding: 12px 16px;
            border: 1px solid var(--border-color);
            background-color: var(--bg-light);
            border-radius: 8px;
            font-size: 1rem;
            color: var(--secondary);
            transition: var(--transition);
        }

        .form-control:focus {
            outline: none;
            border-color: var(--primary);
            background-color: var(--bg-white);
            box-shadow: 0 0 0 3px rgba(34, 197, 94, 0.15);
        }

        textarea.form-control {
            resize: vertical;
            min-height: 100px;
        }

        /* 联系我们 & 加盟代理 */
        .info-sidebar {
            display: flex;
            flex-direction: column;
            gap: 30px;
        }

        .agent-card {
            background: linear-gradient(135deg, var(--secondary) 0%, #1e293b 100%);
            color: var(--bg-white);
            border-radius: 16px;
            padding: 35px;
            position: relative;
            overflow: hidden;
        }

        .agent-card h3 {
            color: var(--primary);
            font-size: 1.5rem;
            margin-bottom: 15px;
        }

        .agent-card p {
            font-size: 0.95rem;
            color: #cbd5e1;
            margin-bottom: 20px;
        }

        .agent-highlight {
            font-size: 1.3rem;
            font-weight: 800;
            color: var(--bg-white);
            border-left: 4px solid var(--primary);
            padding-left: 15px;
            margin-bottom: 25px;
        }

        .contact-methods {
            background-color: var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: 16px;
            padding: 30px;
            box-shadow: var(--shadow);
        }

        .contact-methods h3 {
            font-size: 1.3rem;
            color: var(--secondary);
            margin-bottom: 20px;
        }

        .method-item {
            display: flex;
            align-items: center;
            gap: 15px;
            margin-bottom: 20px;
        }

        .method-item:last-child {
            margin-bottom: 0;
        }

        .method-icon {
            width: 45px;
            height: 45px;
            background-color: var(--primary-light);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            color: var(--primary-dark);
        }

        .method-details h5 {
            font-weight: 700;
            color: var(--secondary);
            font-size: 0.95rem;
        }

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

        .qr-box {
            display: flex;
            align-items: center;
            gap: 20px;
            margin-top: 20px;
            padding-top: 20px;
            border-top: 1px solid var(--border-color);
        }

        .qr-img-container {
            width: 100px;
            height: 100px;
            border: 1px solid var(--border-color);
            border-radius: 8px;
            padding: 5px;
            background-color: var(--bg-white);
        }

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

        /* 页脚 */
        footer {
            background-color: var(--secondary);
            color: #94a3b8;
            padding: 60px 0 30px;
            font-size: 0.9rem;
            border-top: 1px solid #1e293b;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.2fr 0.8fr;
            gap: 50px;
            margin-bottom: 40px;
        }

        .footer-about h4 {
            color: var(--bg-white);
            font-size: 1.2rem;
            margin-bottom: 20px;
        }

        .footer-about p {
            margin-bottom: 20px;
            line-height: 1.7;
        }

        .footer-links-title {
            color: var(--bg-white);
            font-weight: 700;
            margin-bottom: 20px;
            font-size: 1.1rem;
        }

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

        .friend-links a {
            color: #94a3b8;
            text-decoration: none;
            transition: var(--transition);
            background-color: #1e293b;
            padding: 6px 12px;
            border-radius: 4px;
        }

        .friend-links a:hover {
            color: var(--primary);
            background-color: #1e293b;
        }

        .footer-bottom {
            border-top: 1px solid #1e293b;
            padding-top: 30px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 20px;
        }

        .footer-bottom p {
            margin: 0;
        }

        .ai-page-home-link {
            color: var(--primary);
            text-decoration: none;
            font-weight: 700;
        }

        .ai-page-home-link:hover {
            text-decoration: underline;
        }

        /* 侧边悬浮窗口 */
        .sticky-services {
            position: fixed;
            right: 20px;
            bottom: 100px;
            display: flex;
            flex-direction: column;
            gap: 10px;
            z-index: 999;
        }

        .sticky-btn {
            width: 50px;
            height: 50px;
            background-color: var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            box-shadow: var(--shadow-md);
            transition: var(--transition);
            position: relative;
        }

        .sticky-btn:hover {
            background-color: var(--primary);
            color: var(--bg-white);
            border-color: var(--primary);
        }

        .sticky-btn-icon {
            font-size: 1.4rem;
        }

        .sticky-popup {
            position: absolute;
            right: 60px;
            bottom: 0;
            background-color: var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 20px;
            box-shadow: var(--shadow-md);
            width: 220px;
            display: none;
            text-align: center;
        }

        .sticky-popup img {
            width: 150px;
            height: 150px;
            margin-bottom: 10px;
        }

        .sticky-popup p {
            font-size: 0.85rem;
            color: var(--text-main);
            font-weight: 700;
        }

        .sticky-btn:hover .sticky-popup {
            display: block;
        }

        .back-to-top {
            display: none;
        }

        /* 响应式调整 */
        @media (max-width: 1024px) {
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .scenes-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .training-grid {
                grid-template-columns: 1fr;
            }
            .comments-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .news-grid {
                grid-template-columns: repeat(3, 1fr);
            }
        }

        @media (max-width: 768px) {
            .nav-menu {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 70px;
                left: 0;
                right: 0;
                background-color: var(--bg-white);
                border-bottom: 1px solid var(--border-color);
                padding: 20px;
                gap: 15px;
                box-shadow: var(--shadow-md);
            }
            .nav-menu.active {
                display: flex;
            }
            .nav-toggle {
                display: block;
            }
            .hero-title {
                font-size: 2.2rem;
            }
            .about-grid, .standards-container, .help-layout, .contact-layout, .footer-grid, .eval-grid {
                grid-template-columns: 1fr;
            }
            .process-flow {
                flex-direction: column;
                gap: 40px;
            }
            .process-flow::before {
                display: none;
            }
            .case-grid {
                grid-template-columns: 1fr;
            }
            .scenes-grid {
                grid-template-columns: 1fr;
            }
            .comments-grid {
                grid-template-columns: 1fr;
            }
            .news-grid {
                grid-template-columns: 1fr;
            }
            .network-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }