:root {
            --primary: #4f46e5;
            --secondary: #ff007f;
            --accent: #00f2fe;
            --dark: #0f172a;
            --light: #f8fafc;
            --gray-100: #f1f5f9;
            --gray-200: #e2e8f0;
            --gray-700: #334155;
            --border-radius: 12px;
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

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

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

        /* 布局容器 */
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* 导航 */
        header {
            position: sticky;
            top: 0;
            background-color: rgba(255, 255, 255, 0.9);
            backdrop-filter: blur(8px);
            z-index: 1000;
            border-bottom: 1px solid var(--gray-200);
            transition: var(--transition);
        }

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

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

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

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

        .nav-menu a {
            text-decoration: none;
            color: var(--gray-700);
            font-size: 14px;
            font-weight: 500;
            transition: var(--transition);
        }

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

        .nav-btn {
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: white !important;
            padding: 8px 16px;
            border-radius: 20px;
            font-weight: 600 !important;
        }

        .menu-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 24px;
            cursor: pointer;
            color: var(--dark);
        }

        /* Hero 区域 (首屏绝对不包含图片) */
        .hero-section {
            padding: 100px 0 80px;
            background: radial-gradient(circle at 80% 20%, rgba(255, 0, 127, 0.05), transparent),
                        radial-gradient(circle at 20% 80%, rgba(0, 242, 254, 0.08), transparent);
            text-align: center;
            position: relative;
        }

        .hero-section::before {
            content: '';
            position: absolute;
            top: 10%;
            left: 5%;
            width: 150px;
            height: 150px;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            opacity: 0.15;
            filter: blur(60px);
            border-radius: 50%;
        }

        .hero-section::after {
            content: '';
            position: absolute;
            bottom: 10%;
            right: 5%;
            width: 200px;
            height: 200px;
            background: linear-gradient(135deg, var(--secondary), var(--primary));
            opacity: 0.15;
            filter: blur(80px);
            border-radius: 50%;
        }

        .badge {
            display: inline-block;
            padding: 6px 16px;
            background: rgba(79, 70, 229, 0.1);
            color: var(--primary);
            border-radius: 30px;
            font-size: 14px;
            font-weight: 600;
            margin-bottom: 24px;
            border: 1px solid rgba(79, 70, 229, 0.2);
        }

        h1 {
            font-size: 2.8rem;
            line-height: 1.2;
            color: var(--dark);
            margin-bottom: 24px;
            font-weight: 800;
        }

        h1 span {
            background: linear-gradient(135deg, var(--primary) 30%, var(--secondary) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .hero-desc {
            font-size: 1.2rem;
            color: var(--gray-700);
            max-width: 800px;
            margin: 0 auto 36px;
        }

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

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 14px 28px;
            font-size: 16px;
            font-weight: 600;
            border-radius: var(--border-radius);
            text-decoration: none;
            transition: var(--transition);
            cursor: pointer;
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: white;
            box-shadow: 0 4px 15px rgba(255, 0, 127, 0.2);
            border: none;
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(255, 0, 127, 0.3);
        }

        .btn-secondary {
            background: white;
            color: var(--dark);
            border: 2px solid var(--gray-200);
        }

        .btn-secondary:hover {
            border-color: var(--primary);
            background: var(--gray-100);
        }

        /* 数据指标 */
        .stats-section {
            background: white;
            padding: 40px 0;
            border-top: 1px solid var(--gray-200);
            border-bottom: 1px solid var(--gray-200);
        }

        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            text-align: center;
        }

        .stat-card h3 {
            font-size: 2.5rem;
            color: var(--secondary);
            font-weight: 800;
            margin-bottom: 8px;
        }

        .stat-card p {
            color: var(--gray-700);
            font-size: 14px;
        }

        /* 公共板块样式 */
        section {
            padding: 80px 0;
        }

        .section-header {
            text-align: center;
            max-width: 700px;
            margin: 0 auto 50px;
        }

        .section-header h2 {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--dark);
            margin-bottom: 16px;
        }

        .section-header p {
            color: var(--gray-700);
            font-size: 16px;
        }

        /* 服务能力卡片 */
        .services-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }

        .service-card {
            background: white;
            padding: 30px;
            border-radius: var(--border-radius);
            box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
            border: 1px solid var(--gray-200);
            transition: var(--transition);
        }

        .service-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 20px -5px rgba(79, 70, 229, 0.1);
            border-color: var(--primary);
        }

        .service-icon {
            font-size: 2.5rem;
            margin-bottom: 20px;
        }

        .service-card h3 {
            font-size: 1.3rem;
            margin-bottom: 12px;
            color: var(--dark);
        }

        .service-card p {
            color: var(--gray-700);
            font-size: 14px;
        }

        /* 支持模型标签云 */
        .model-tags-container {
            background: var(--gray-100);
            padding: 40px;
            border-radius: var(--border-radius);
            margin-top: 40px;
            text-align: center;
        }

        .model-tags-container h4 {
            margin-bottom: 20px;
            color: var(--dark);
        }

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

        .tag {
            background: white;
            color: var(--gray-700);
            padding: 6px 14px;
            border-radius: 20px;
            font-size: 13px;
            font-weight: 500;
            border: 1px solid var(--gray-200);
            transition: var(--transition);
        }

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

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

        .solution-card {
            background: white;
            border-radius: var(--border-radius);
            overflow: hidden;
            border: 1px solid var(--gray-200);
            display: flex;
            flex-direction: column;
        }

        .solution-content {
            padding: 30px;
        }

        .solution-content h3 {
            font-size: 1.4rem;
            margin-bottom: 12px;
            color: var(--dark);
        }

        .solution-content ul {
            list-style: none;
            margin: 15px 0;
        }

        .solution-content ul li {
            position: relative;
            padding-left: 20px;
            margin-bottom: 8px;
            font-size: 14px;
            color: var(--gray-700);
        }

        .solution-content ul li::before {
            content: '✓';
            position: absolute;
            left: 0;
            color: var(--secondary);
            font-weight: bold;
        }

        /* 对比评测表格 */
        .comparison-table-wrapper {
            overflow-x: auto;
            background: white;
            border-radius: var(--border-radius);
            box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
            border: 1px solid var(--gray-200);
        }

        .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(--gray-200);
        }

        .comparison-table th {
            background-color: var(--gray-100);
            font-weight: 700;
        }

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

        .highlight-col {
            background-color: rgba(79, 70, 229, 0.03);
            font-weight: 600;
        }

        .score-box {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 15px;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: white;
            padding: 30px;
            border-radius: var(--border-radius);
            margin-bottom: 30px;
            text-align: center;
        }

        .score-num {
            font-size: 3rem;
            font-weight: 800;
        }

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

        .case-card {
            background: white;
            border-radius: var(--border-radius);
            overflow: hidden;
            border: 1px solid var(--gray-200);
            transition: var(--transition);
        }

        .case-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 20px rgba(0, 0, 0, 0.05);
        }

        .case-img-container {
            width: 100%;
            aspect-ratio: 16/9;
            overflow: hidden;
            background-color: var(--gray-100);
        }

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

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

        .case-body {
            padding: 20px;
        }

        .case-tag {
            display: inline-block;
            padding: 2px 10px;
            background-color: var(--gray-100);
            font-size: 12px;
            border-radius: 4px;
            margin-bottom: 10px;
            color: var(--primary);
            font-weight: 600;
        }

        /* 服务流程 */
        .steps-container {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            position: relative;
        }

        .step-item {
            text-align: center;
            background: white;
            padding: 30px 20px;
            border-radius: var(--border-radius);
            border: 1px solid var(--gray-200);
            position: relative;
        }

        .step-num {
            width: 40px;
            height: 40px;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            margin: 0 auto 20px;
        }

        /* 评论板块 */
        .reviews-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }

        .review-card {
            background: white;
            padding: 30px;
            border-radius: var(--border-radius);
            border: 1px solid var(--gray-200);
            box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
        }

        .review-header {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 15px;
        }

        .avatar-placeholder {
            width: 45px;
            height: 45px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--accent), var(--primary));
            color: white;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: bold;
        }

        .review-meta h4 {
            font-size: 15px;
            color: var(--dark);
        }

        .review-meta span {
            font-size: 12px;
            color: var(--gray-700);
        }

        /* FAQ 折叠面板 */
        .faq-container {
            max-width: 800px;
            margin: 0 auto;
        }

        .faq-item {
            background: white;
            border: 1px solid var(--gray-200);
            border-radius: var(--border-radius);
            margin-bottom: 15px;
            overflow: hidden;
            transition: var(--transition);
        }

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

        .faq-answer {
            padding: 0 20px;
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease-out, padding 0.3s ease-out;
            color: var(--gray-700);
            font-size: 14px;
            border-top: 0 solid var(--gray-200);
        }

        .faq-item.active .faq-answer {
            padding: 20px;
            max-height: 200px;
            border-top: 1px solid var(--gray-200);
        }

        .faq-icon::after {
            content: '+';
            font-size: 20px;
            font-weight: bold;
            color: var(--primary);
        }

        .faq-item.active .faq-icon::after {
            content: '−';
        }

        /* 需求匹配与联系我们表单 */
        .contact-section {
            background: linear-gradient(135deg, rgba(79, 70, 229, 0.02), rgba(255, 0, 127, 0.02));
        }

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

        .contact-info h3 {
            font-size: 1.8rem;
            margin-bottom: 20px;
            color: var(--dark);
        }

        .contact-details {
            margin-top: 30px;
        }

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

        .qr-codes {
            display: flex;
            gap: 20px;
            margin-top: 30px;
        }

        .qr-item {
            text-align: center;
            font-size: 13px;
        }

        .qr-item img {
            width: 120px;
            height: 120px;
            border: 1px solid var(--gray-200);
            border-radius: 8px;
            margin-bottom: 8px;
        }

        .contact-form-card {
            background: white;
            padding: 40px;
            border-radius: var(--border-radius);
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
            border: 1px solid var(--gray-200);
        }

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

        .form-group label {
            display: block;
            margin-bottom: 8px;
            font-weight: 500;
            font-size: 14px;
        }

        .form-control {
            width: 100%;
            padding: 12px 16px;
            border: 1px solid var(--gray-200);
            border-radius: 8px;
            outline: none;
            transition: var(--transition);
        }

        .form-control:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
        }

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

        .article-card {
            background: white;
            border-radius: var(--border-radius);
            border: 1px solid var(--gray-200);
            padding: 24px;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .article-card h3 {
            font-size: 1.1rem;
            margin-bottom: 15px;
            color: var(--dark);
        }

        .article-link {
            color: var(--primary);
            text-decoration: none;
            font-weight: 600;
            font-size: 14px;
            display: inline-flex;
            align-items: center;
            gap: 5px;
        }

        .article-link:hover {
            color: var(--secondary);
        }

        /* 悬浮客服 */
        .floating-service {
            position: fixed;
            right: 24px;
            bottom: 24px;
            z-index: 999;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .float-btn {
            width: 50px;
            height: 50px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--secondary), var(--primary));
            color: white;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
            cursor: pointer;
            transition: var(--transition);
            border: none;
            position: relative;
        }

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

        .float-qr-box {
            position: absolute;
            bottom: 60px;
            right: 0;
            background: white;
            border: 1px solid var(--gray-200);
            padding: 15px;
            border-radius: 8px;
            box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
            display: none;
            text-align: center;
            width: 150px;
        }

        .float-qr-box img {
            width: 120px;
            height: 120px;
        }

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

        /* 页脚与友情链接 */
        footer {
            background-color: var(--dark);
            color: rgba(255, 255, 255, 0.7);
            padding: 60px 0 30px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
        }

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

        .footer-column h3 {
            color: white;
            font-size: 16px;
            margin-bottom: 20px;
        }

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

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

        .footer-links a {
            color: rgba(255, 255, 255, 0.7);
            text-decoration: none;
            font-size: 14px;
            transition: var(--transition);
        }

        .footer-links a:hover {
            color: var(--accent);
        }

        .friend-links-area {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 20px;
            margin-top: 20px;
        }

        .friend-links-area a {
            color: rgba(255, 255, 255, 0.5);
            text-decoration: none;
            margin-right: 15px;
            font-size: 13px;
        }

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

        .footer-bottom {
            text-align: center;
            padding-top: 30px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            font-size: 13px;
        }

        /* 响应式调整 */
        @media (max-width: 1024px) {
            .services-grid, .case-grid, .reviews-grid, .articles-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .steps-container {
                grid-template-columns: repeat(2, 1fr);
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            h1 {
                font-size: 2rem;
            }
            .menu-toggle {
                display: block;
            }
            .nav-menu {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 70px;
                left: 0;
                width: 100%;
                background: white;
                border-bottom: 1px solid var(--gray-200);
                padding: 20px;
                box-shadow: 0 10px 15px rgba(0,0,0,0.05);
            }
            .nav-menu.active {
                display: flex;
            }
            .contact-grid {
                grid-template-columns: 1fr;
            }
            .services-grid, .case-grid, .reviews-grid, .articles-grid, .solutions-grid {
                grid-template-columns: 1fr;
            }
            .steps-container {
                grid-template-columns: 1fr;
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
        }