:root {
            --primary: #10b981; /* 鲜绿色 */
            --primary-hover: #059669;
            --primary-light: #ecfdf5;
            --text-dark: #0f172a;
            --text-muted: #475569;
            --bg-light: #f8fafc;
            --bg-white: #ffffff;
            --border-color: #e2e8f0;
            --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
            --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
            --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --max-width: 1200px;
        }

        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            scroll-behavior: smooth;
        }

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

        /* 统一容器 */
        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 20px;
        }

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

        .btn-primary {
            background-color: var(--primary);
            color: var(--bg-white);
            box-shadow: 0 4px 14px rgba(16, 185, 129, 0.4);
        }

        .btn-primary:hover {
            background-color: var(--primary-hover);
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(16, 185, 129, 0.6);
        }

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

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

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

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

        .logo-wrap {
            display: flex;
            align-items: center;
            gap: 10px;
            text-decoration: none;
            color: var(--text-dark);
            font-size: 1.25rem;
            font-weight: 700;
        }

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

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

        .nav-links a {
            text-decoration: none;
            color: var(--text-muted);
            font-weight: 500;
            font-size: 0.95rem;
            transition: var(--transition);
            padding: 8px 12px;
            border-radius: 6px;
        }

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

        .menu-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: none;
            border: none;
            cursor: pointer;
            padding: 5px;
            z-index: 1001;
        }

        .menu-toggle span {
            display: block;
            width: 25px;
            height: 3px;
            background-color: var(--text-dark);
            transition: var(--transition);
        }

        /* 首屏 Hero - 无图片设计，纯科技感与气势 */
        .hero {
            padding: 160px 0 100px 0;
            background: radial-gradient(circle at 80% 20%, rgba(16, 185, 129, 0.15) 0%, transparent 50%), 
                        linear-gradient(135deg, #ffffff 0%, #f0fdf4 100%);
            position: relative;
            text-align: center;
        }

        .hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background-image: radial-gradient(var(--primary) 1px, transparent 1px);
            background-size: 30px 30px;
            opacity: 0.05;
            pointer-events: none;
        }

        .hero-tag {
            display: inline-flex;
            align-items: center;
            padding: 6px 16px;
            background-color: var(--primary-light);
            color: var(--primary);
            border: 1px solid rgba(16, 185, 129, 0.2);
            border-radius: 50px;
            font-size: 0.875rem;
            font-weight: 600;
            margin-bottom: 24px;
            animation: pulse 2s infinite;
        }

        .hero h1 {
            font-size: 3rem;
            line-height: 1.2;
            font-weight: 800;
            color: var(--text-dark);
            max-width: 900px;
            margin: 0 auto 24px auto;
            letter-spacing: -0.5px;
        }

        .hero-desc {
            font-size: 1.25rem;
            color: var(--text-muted);
            max-width: 700px;
            margin: 0 auto 40px auto;
        }

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

        /* 数据指标卡片 */
        .stats-section {
            padding: 40px 0;
            margin-top: -60px;
            position: relative;
            z-index: 10;
        }

        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 20px;
            background-color: var(--bg-white);
            border-radius: 16px;
            padding: 30px;
            box-shadow: var(--shadow-lg);
            border: 1px solid var(--border-color);
        }

        .stat-card {
            text-align: center;
            padding: 10px;
        }

        .stat-num {
            font-size: 2.25rem;
            font-weight: 800;
            color: var(--primary);
            margin-bottom: 8px;
        }

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

        /* 平台介绍板块 */
        .section-header {
            text-align: center;
            max-width: 700px;
            margin: 0 auto 60px auto;
        }

        .section-title {
            font-size: 2.25rem;
            font-weight: 800;
            color: var(--text-dark);
            margin-bottom: 16px;
            position: relative;
            display: inline-block;
        }

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

        .section-subtitle {
            font-size: 1.1rem;
            color: var(--text-muted);
        }

        .section-padding {
            padding: 100px 0;
            border-bottom: 1px solid var(--border-color);
        }

        /* 平台介绍细节 */
        .intro-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
            align-items: center;
        }

        .intro-text h3 {
            font-size: 1.75rem;
            margin-bottom: 20px;
            color: var(--text-dark);
        }

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

        .feature-bullets {
            list-style: none;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 15px;
        }

        .feature-bullets li {
            position: relative;
            padding-left: 24px;
            font-weight: 600;
            color: var(--text-dark);
        }

        .feature-bullets li::before {
            content: "✓";
            position: absolute;
            left: 0;
            color: var(--primary);
            font-weight: bold;
        }

        .intro-visual {
            background-color: var(--primary-light);
            border: 2px dashed var(--primary);
            border-radius: 20px;
            padding: 40px;
            text-align: center;
        }

        .model-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            justify-content: center;
        }

        .model-tag {
            background-color: var(--bg-white);
            border: 1px solid var(--border-color);
            color: var(--text-dark);
            padding: 6px 12px;
            border-radius: 20px;
            font-size: 0.85rem;
            font-weight: 600;
            transition: var(--transition);
        }

        .model-tag:hover {
            border-color: var(--primary);
            color: var(--primary);
            transform: scale(1.05);
        }

        /* AIGC 服务能力卡片 */
        .services-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
        }

        .service-card {
            background-color: var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: 16px;
            padding: 35px;
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }

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

        .service-card:hover {
            transform: translateY(-8px);
            box-shadow: var(--shadow-lg);
            border-color: var(--primary-light);
        }

        .service-card:hover::before {
            background-color: var(--primary);
        }

        .service-icon {
            width: 50px;
            height: 50px;
            background-color: var(--primary-light);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 24px;
            color: var(--primary);
            font-size: 1.5rem;
            font-weight: bold;
        }

        .service-card h3 {
            font-size: 1.35rem;
            margin-bottom: 12px;
            color: var(--text-dark);
        }

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

        /* 对比评测模块 */
        .comparison-wrap {
            background-color: var(--bg-white);
            border-radius: 20px;
            padding: 40px;
            box-shadow: var(--shadow-lg);
            border: 1px solid var(--border-color);
            margin-bottom: 50px;
        }

        .rating-badge {
            display: flex;
            align-items: center;
            justify-content: space-between;
            background-color: var(--primary-light);
            padding: 20px;
            border-radius: 12px;
            margin-bottom: 30px;
            border: 1px solid rgba(16, 185, 129, 0.2);
        }

        .rating-score {
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--primary);
        }

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

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

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

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

        .comparison-table tr:hover {
            background-color: var(--primary-light);
        }

        .badge-pro {
            background-color: var(--primary);
            color: var(--bg-white);
            padding: 4px 8px;
            border-radius: 4px;
            font-size: 0.75rem;
            font-weight: 700;
        }

        /* 流程步骤 & 培训时间线 */
        .process-steps {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 30px;
            position: relative;
        }

        .step-card {
            background-color: var(--bg-white);
            border-radius: 12px;
            padding: 30px;
            text-align: center;
            border: 1px solid var(--border-color);
            position: relative;
        }

        .step-num {
            width: 40px;
            height: 40px;
            background-color: var(--primary);
            color: var(--bg-white);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            margin: 0 auto 20px auto;
        }

        /* 案例中心 */
        .case-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 30px;
        }

        .case-card {
            background-color: var(--bg-white);
            border-radius: 16px;
            overflow: hidden;
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }

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

        .case-img-wrap {
            position: relative;
            background-color: var(--primary-light);
            overflow: hidden;
            display: flex;
            justify-content: center;
            align-items: center;
        }

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

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

        .case-content {
            padding: 24px;
        }

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

        .case-content h3 {
            font-size: 1.25rem;
            margin-bottom: 10px;
            color: var(--text-dark);
        }

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

        /* 培训认证板块 */
        .train-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
            align-items: center;
        }

        .train-list {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        .train-item {
            background-color: var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 20px;
            display: flex;
            gap: 15px;
            align-items: flex-start;
            transition: var(--transition);
        }

        .train-item:hover {
            border-color: var(--primary);
            box-shadow: var(--shadow-sm);
        }

        .train-badge {
            background-color: var(--primary-light);
            color: var(--primary);
            font-weight: bold;
            padding: 8px 12px;
            border-radius: 8px;
            font-size: 0.9rem;
            flex-shrink: 0;
        }

        .train-details h4 {
            font-size: 1.1rem;
            margin-bottom: 5px;
            color: var(--text-dark);
        }

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

        /* 客户评价 */
        .reviews-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
        }

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

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

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

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

        .user-info h4 {
            font-size: 0.95rem;
            color: var(--text-dark);
        }

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

        /* FAQ折叠面板 */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 15px;
        }

        .faq-item {
            background-color: var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: 10px;
            overflow: hidden;
            transition: var(--transition);
        }

        .faq-question {
            padding: 20px 24px;
            font-weight: 600;
            color: var(--text-dark);
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            user-select: none;
        }

        .faq-question::after {
            content: '+';
            font-size: 1.5rem;
            color: var(--primary);
            transition: var(--transition);
        }

        .faq-item.active .faq-question::after {
            transform: rotate(45deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease-out;
            background-color: var(--bg-light);
        }

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

        /* 行业资讯 / 知识库 */
        .articles-list {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
            margin-bottom: 40px;
        }

        .article-card {
            background-color: var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 24px;
            transition: var(--transition);
        }

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

        .article-card h3 {
            font-size: 1.15rem;
            margin-bottom: 12px;
        }

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

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

        .article-meta {
            font-size: 0.8rem;
            color: var(--text-muted);
            display: flex;
            gap: 15px;
        }

        /* 联系与表单模块 */
        .contact-grid {
            display: grid;
            grid-template-columns: 1fr 1.2fr;
            gap: 50px;
        }

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

        .contact-info h3 {
            font-size: 1.75rem;
            margin-bottom: 20px;
            color: var(--primary);
        }

        .contact-details {
            display: flex;
            flex-direction: column;
            gap: 20px;
            margin-bottom: 40px;
        }

        .contact-item {
            display: flex;
            gap: 15px;
            align-items: flex-start;
        }

        .contact-item h4 {
            color: var(--border-color);
            font-size: 0.9rem;
            margin-bottom: 4px;
        }

        .contact-item p {
            color: var(--bg-white);
        }

        .qrcode-wrap {
            display: flex;
            gap: 20px;
            align-items: center;
            background: rgba(255, 255, 255, 0.05);
            padding: 20px;
            border-radius: 12px;
            border: 1px solid rgba(255, 255, 255, 0.1);
        }

        .qrcode-wrap img {
            width: 100px;
            height: 100px;
            border-radius: 8px;
            background-color: #fff;
            padding: 4px;
        }

        .qrcode-text p {
            font-size: 0.9rem;
            margin-bottom: 4px;
        }

        .contact-form-wrap {
            background-color: var(--bg-white);
            border-radius: 20px;
            padding: 40px;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-lg);
        }

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

        .form-label {
            display: block;
            margin-bottom: 8px;
            font-weight: 600;
            font-size: 0.9rem;
            color: var(--text-dark);
        }

        .form-control {
            width: 100%;
            padding: 12px 16px;
            border: 1px solid var(--border-color);
            border-radius: 8px;
            background-color: var(--bg-light);
            transition: var(--transition);
            font-size: 0.95rem;
        }

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

        /* 标签云与百科 */
        .wiki-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 30px;
        }

        .wiki-tag {
            background-color: var(--bg-light);
            border: 1px solid var(--border-color);
            color: var(--text-muted);
            padding: 6px 14px;
            border-radius: 6px;
            font-size: 0.85rem;
            text-decoration: none;
            transition: var(--transition);
        }

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

        /* 页脚 */
        .footer {
            background-color: #0f172a;
            color: #94a3b8;
            padding: 80px 0 30px 0;
            border-top: 1px solid #1e293b;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 40px;
            margin-bottom: 60px;
        }

        .footer-col h4 {
            color: var(--bg-white);
            font-size: 1.1rem;
            margin-bottom: 20px;
            position: relative;
            padding-bottom: 8px;
        }

        .footer-col h4::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 30px;
            height: 2px;
            background-color: var(--primary);
        }

        .footer-col ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .footer-col ul a {
            color: #94a3b8;
            text-decoration: none;
            transition: var(--transition);
            font-size: 0.9rem;
        }

        .footer-col ul a:hover {
            color: var(--primary);
            padding-left: 5px;
        }

        .footer-bottom {
            border-top: 1px solid #1e293b;
            padding-top: 30px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 20px;
            font-size: 0.85rem;
        }

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

        .friend-links a {
            color: #64748b;
            text-decoration: none;
            transition: var(--transition);
        }

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

        /* 浮动客服 */
        .floating-action {
            position: fixed;
            bottom: 30px;
            right: 30px;
            z-index: 999;
            display: flex;
            flex-direction: column;
            gap: 15px;
        }

        .float-btn {
            width: 50px;
            height: 50px;
            border-radius: 50%;
            background-color: var(--bg-white);
            box-shadow: var(--shadow-lg);
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: var(--transition);
            border: 1px solid var(--border-color);
            position: relative;
            text-decoration: none;
            color: var(--text-dark);
        }

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

        .float-btn .tooltip {
            position: absolute;
            right: 60px;
            background-color: var(--text-dark);
            color: var(--bg-white);
            padding: 6px 12px;
            border-radius: 4px;
            font-size: 0.8rem;
            white-space: nowrap;
            opacity: 0;
            visibility: hidden;
            transition: var(--transition);
            pointer-events: none;
        }

        .float-btn:hover .tooltip {
            opacity: 1;
            visibility: visible;
        }

        .float-qrcode {
            position: absolute;
            bottom: 60px;
            right: 0;
            background-color: var(--bg-white);
            padding: 15px;
            border-radius: 12px;
            box-shadow: var(--shadow-lg);
            border: 1px solid var(--border-color);
            opacity: 0;
            visibility: hidden;
            transition: var(--transition);
            text-align: center;
            width: 150px;
        }

        .float-qrcode img {
            width: 100%;
            height: auto;
            margin-bottom: 8px;
        }

        .float-btn:hover .float-qrcode {
            opacity: 1;
            visibility: visible;
        }

        /* 动画效果 */
        @keyframes pulse {
            0% { transform: scale(1); }
            50% { transform: scale(1.05); }
            100% { transform: scale(1); }
        }

        /* 响应式适配 */
        @media (max-width: 992px) {
            .intro-grid, .train-grid, .contact-grid {
                grid-template-columns: 1fr;
                gap: 40px;
            }

            .hero h1 {
                font-size: 2.25rem;
            }

            .menu-toggle {
                display: flex;
            }

            .nav-links {
                position: fixed;
                top: 70px;
                left: 0;
                right: 0;
                background-color: var(--bg-white);
                flex-direction: column;
                padding: 30px;
                box-shadow: var(--shadow-md);
                border-top: 1px solid var(--border-color);
                display: none;
            }

            .nav-links.show {
                display: flex;
            }

            .menu-toggle.open span:nth-child(1) {
                transform: rotate(45deg) translate(5px, 5px);
            }

            .menu-toggle.open span:nth-child(2) {
                opacity: 0;
            }

            .menu-toggle.open span:nth-child(3) {
                transform: rotate(-45deg) translate(6px, -6px);
            }
        }