:root {
            --primary: #ff6b8b;
            --primary-light: #ffd3db;
            --secondary: #4facfe;
            --secondary-light: #e0f2fe;
            --accent: #2ecc71;
            --accent-light: #e8f9f0;
            --yellow: #feca57;
            --dark: #2d3748;
            --light: #f7fafc;
            --bg-gradient: linear-gradient(135deg, #fff5f6 0%, #f0f7ff 50%, #f6f2ff 100%);
            --card-shadow: 0 10px 25px rgba(255, 107, 139, 0.08);
            --transition: all 0.3s ease;
        }

        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans CJK SC", sans-serif;
        }

        html {
            scroll-behavior: smooth;
        }

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

        /* 统一居中容器 */
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        /* 顶部导航 */
        header.site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            background: rgba(255, 255, 255, 0.9);
            backdrop-filter: blur(10px);
            box-shadow: 0 2px 15px rgba(0,0,0,0.05);
            z-index: 1000;
            transition: var(--transition);
        }

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

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

        .logo-area img {
            max-height: 45px;
            width: auto;
        }

        .logo-text {
            font-size: 1.4rem;
            font-weight: 800;
            background: linear-gradient(45deg, var(--primary), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

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

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

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

        .nav-menu a.active {
            color: #fff;
            background: linear-gradient(45deg, var(--primary), var(--secondary));
        }

        .menu-toggle {
            display: none;
            flex-direction: column;
            cursor: pointer;
            gap: 4px;
        }

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

        /* 按钮设计 */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 12px 28px;
            border-radius: 30px;
            font-weight: 600;
            text-decoration: none;
            transition: var(--transition);
            cursor: pointer;
            border: none;
            font-size: 1rem;
        }

        .btn-primary {
            background: linear-gradient(45deg, var(--primary), #ff7e9d);
            color: #fff;
            box-shadow: 0 6px 20px rgba(255, 107, 139, 0.3);
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 25px rgba(255, 107, 139, 0.4);
        }

        .btn-secondary {
            background: linear-gradient(45deg, var(--secondary), #66b5ff);
            color: #fff;
            box-shadow: 0 6px 20px rgba(79, 172, 254, 0.3);
        }

        .btn-secondary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 25px rgba(79, 172, 254, 0.4);
        }

        .btn-accent {
            background: linear-gradient(45deg, var(--accent), #58d68d);
            color: #fff;
            box-shadow: 0 6px 20px rgba(46, 204, 113, 0.3);
        }

        .btn-accent:hover {
            transform: translateY(-2px);
        }

        /* 首屏 Hero 区 - 禁止图片 */
        .hero-section {
            padding: 160px 0 100px;
            position: relative;
            text-align: center;
            overflow: hidden;
        }

        /* 糖果风浮动几何体 CSS */
        .candy-shape {
            position: absolute;
            border-radius: 50%;
            filter: blur(10px);
            z-index: -1;
            opacity: 0.6;
            animation: floatShape 8s infinite alternate;
        }

        .shape-1 {
            width: 150px;
            height: 150px;
            background: radial-gradient(circle, rgba(255,107,139,0.4) 0%, rgba(255,107,139,0) 70%);
            top: 10%;
            left: 5%;
        }

        .shape-2 {
            width: 250px;
            height: 250px;
            background: radial-gradient(circle, rgba(79,172,254,0.4) 0%, rgba(79,172,254,0) 70%);
            bottom: 5%;
            right: 5%;
            animation-delay: 2s;
        }

        .shape-3 {
            width: 180px;
            height: 180px;
            background: radial-gradient(circle, rgba(254,202,87,0.4) 0%, rgba(254,202,87,0) 70%);
            top: 40%;
            right: 15%;
            animation-delay: 4s;
        }

        @keyframes floatShape {
            0% { transform: translateY(0) scale(1); }
            100% { transform: translateY(-20px) scale(1.1); }
        }

        h1.hero-title {
            font-size: 2.8rem;
            font-weight: 800;
            line-height: 1.25;
            margin-bottom: 20px;
            color: var(--dark);
        }

        h1.hero-title span {
            background: linear-gradient(45deg, var(--primary), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .hero-desc {
            font-size: 1.2rem;
            color: #5a6a85;
            max-width: 800px;
            margin: 0 auto 40px;
        }

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

        /* 首页链接样式规范 */
        .ai-page-home-link {
            text-decoration: underline;
            color: var(--secondary);
            font-weight: bold;
        }

        /* 通用标题模块 */
        .section-header {
            text-align: center;
            margin-bottom: 60px;
        }

        .section-header h2 {
            font-size: 2.2rem;
            color: var(--dark);
            margin-bottom: 15px;
            position: relative;
            display: inline-block;
        }

        .section-header h2::after {
            content: '';
            position: absolute;
            bottom: -8px;
            left: 50%;
            transform: translateX(-50%);
            width: 60px;
            height: 4px;
            background: linear-gradient(90deg, var(--primary), var(--secondary));
            border-radius: 2px;
        }

        .section-header p {
            font-size: 1.05rem;
            color: #64748b;
        }

        /* 主体各栏目 */
        section {
            padding: 80px 0;
        }

        .section-bg-light {
            background: #fff;
            box-shadow: 0 5px 30px rgba(0,0,0,0.02);
            border-radius: 30px;
            margin: 20px 0;
        }

        /* 数据指标卡片 */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 25px;
            margin-top: 40px;
        }

        .stat-card {
            background: #fff;
            padding: 30px 20px;
            border-radius: 20px;
            box-shadow: var(--card-shadow);
            border: 1px solid rgba(255, 107, 139, 0.1);
            text-align: center;
            transition: var(--transition);
        }

        .stat-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 15px 35px rgba(255, 107, 139, 0.15);
        }

        .stat-number {
            font-size: 2.5rem;
            font-weight: 800;
            color: var(--primary);
            margin-bottom: 10px;
        }

        .stat-label {
            font-size: 1rem;
            color: #5a6a85;
            font-weight: 600;
        }

        /* 平台介绍 & 关于我们 */
        .about-wrap {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
            align-items: center;
        }

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

        .about-content p {
            color: #5a6a85;
            margin-bottom: 15px;
            font-size: 1.05rem;
        }

        .about-media {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        .about-media img {
            width: 100%;
            border-radius: 20px;
            box-shadow: var(--card-shadow);
            object-fit: cover;
        }

        /* 全平台 AIGC 服务 */
        .services-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 30px;
        }

        .service-card {
            background: #fff;
            border-radius: 24px;
            padding: 35px;
            box-shadow: var(--card-shadow);
            border-top: 5px solid var(--secondary);
            transition: var(--transition);
        }

        .service-card:nth-child(2n) {
            border-top-color: var(--primary);
        }

        .service-card:nth-child(3n) {
            border-top-color: var(--yellow);
        }

        .service-card:hover {
            transform: translateY(-8px);
        }

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

        .service-card h3 {
            font-size: 1.4rem;
            margin-bottom: 15px;
            color: var(--dark);
        }

        .service-card p {
            color: #5a6a85;
            font-size: 0.95rem;
            margin-bottom: 20px;
        }

        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-top: 15px;
        }

        .tag-item {
            font-size: 0.8rem;
            padding: 4px 10px;
            border-radius: 12px;
            background: var(--light);
            color: var(--dark);
            border: 1px solid #e2e8f0;
        }

        .service-card:nth-child(1) .tag-item { background: var(--secondary-light); color: #0284c7; }
        .service-card:nth-child(2) .tag-item { background: var(--primary-light); color: #be185d; }
        .service-card:nth-child(3) .tag-item { background: var(--accent-light); color: #15803d; }

        /* 全行业解决方案 */
        .solutions-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 25px;
        }

        .solution-card {
            background: #fff;
            border-radius: 20px;
            padding: 30px;
            box-shadow: var(--card-shadow);
            border: 1px solid #f1f5f9;
            transition: var(--transition);
        }

        .solution-card:hover {
            border-color: var(--primary-light);
            transform: scale(1.02);
        }

        .solution-card h3 {
            font-size: 1.25rem;
            margin-bottom: 15px;
            color: var(--dark);
            display: flex;
            align-items: center;
            gap: 10px;
        }

        /* 流程步骤 */
        .process-steps {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
            gap: 20px;
            position: relative;
        }

        .step-item {
            background: #fff;
            padding: 25px 20px;
            border-radius: 20px;
            text-align: center;
            box-shadow: var(--card-shadow);
            border: 1px solid #edf2f7;
            position: relative;
        }

        .step-num {
            width: 40px;
            height: 40px;
            background: linear-gradient(45deg, var(--primary), var(--secondary));
            color: #fff;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: bold;
            margin: 0 auto 15px;
        }

        .step-item h3 {
            font-size: 1.1rem;
            margin-bottom: 10px;
        }

        .step-item p {
            font-size: 0.85rem;
            color: #64748b;
        }

        /* 案例展示区 */
        .case-gallery {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
        }

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

        .case-img-wrap {
            width: 100%;
            height: 200px;
            overflow: hidden;
            background: #e2e8f0;
        }

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

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

        .case-info {
            padding: 20px;
        }

        .case-info h3 {
            font-size: 1.2rem;
            margin-bottom: 10px;
        }

        .case-info p {
            font-size: 0.9rem;
            color: #64748b;
        }

        /* 对比评测表格 */
        .table-responsive {
            width: 100%;
            overflow-x: auto;
            border-radius: 20px;
            box-shadow: var(--card-shadow);
            background: #fff;
        }

        table.compare-table {
            width: 100%;
            border-collapse: collapse;
            text-align: left;
            min-width: 700px;
        }

        table.compare-table th, table.compare-table td {
            padding: 18px 24px;
            border-bottom: 1px solid #e2e8f0;
        }

        table.compare-table th {
            background: linear-gradient(90deg, var(--secondary-light), #fff);
            color: var(--dark);
            font-weight: 700;
        }

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

        .compare-star {
            color: var(--yellow);
            font-size: 1.2rem;
        }

        .compare-score {
            font-size: 1.3rem;
            font-weight: 800;
            color: var(--primary);
        }

        /* 培训版块 */
        .training-wrap {
            display: grid;
            grid-template-columns: 1fr 1.2fr;
            gap: 40px;
            align-items: center;
        }

        .training-left h3 {
            font-size: 1.8rem;
            margin-bottom: 20px;
        }

        .course-list {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
        }

        .course-card {
            background: #fff;
            padding: 20px;
            border-radius: 16px;
            box-shadow: var(--card-shadow);
            border-left: 4px solid var(--accent);
        }

        /* FAQ折叠面板 */
        .faq-wrap {
            max-width: 900px;
            margin: 0 auto;
        }

        .faq-item {
            background: #fff;
            border-radius: 15px;
            margin-bottom: 15px;
            box-shadow: var(--card-shadow);
            overflow: hidden;
            border: 1px solid #f1f5f9;
        }

        .faq-header {
            padding: 20px 25px;
            background: #fff;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-weight: 600;
            transition: var(--transition);
        }

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

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

        .faq-content {
            padding: 0 25px;
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease-out, padding 0.3s ease-out;
            color: #5a6a85;
            background: #fafbfe;
        }

        .faq-item.active .faq-content {
            padding: 20px 25px;
            max-height: 200px;
        }

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

        /* 用户评论 */
        .comments-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 25px;
        }

        .comment-card {
            background: #fff;
            padding: 30px;
            border-radius: 20px;
            box-shadow: var(--card-shadow);
            position: relative;
        }

        .comment-text {
            font-style: italic;
            color: #4a5568;
            margin-bottom: 20px;
            font-size: 0.95rem;
        }

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

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

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

        .user-info p {
            font-size: 0.8rem;
            color: #a0aec0;
        }

        /* 资讯 / 知识库 */
        .articles-list {
            margin-bottom: 40px;
        }

        .article-item {
            background: #fff;
            padding: 20px;
            border-radius: 15px;
            margin-bottom: 15px;
            box-shadow: var(--card-shadow);
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 15px;
        }

        .article-title {
            font-weight: 600;
            font-size: 1.05rem;
            color: var(--dark);
        }

        .article-link {
            color: var(--secondary);
            text-decoration: none;
            font-weight: 600;
        }

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

        /* 表单与联系我们 */
        .contact-wrap {
            display: grid;
            grid-template-columns: 1fr 1.2fr;
            gap: 50px;
        }

        .contact-info {
            background: #fff;
            padding: 40px;
            border-radius: 24px;
            box-shadow: var(--card-shadow);
        }

        .contact-info h3 {
            font-size: 1.8rem;
            margin-bottom: 25px;
        }

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

        .contact-method-icon {
            font-size: 1.5rem;
            color: var(--primary);
        }

        .contact-qrcode {
            margin-top: 30px;
            text-align: center;
        }

        .contact-qrcode img {
            max-width: 150px;
            border-radius: 10px;
            border: 2px solid var(--primary-light);
        }

        .contact-form-wrap {
            background: #fff;
            padding: 40px;
            border-radius: 24px;
            box-shadow: var(--card-shadow);
        }

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

        .form-label {
            display: block;
            margin-bottom: 8px;
            font-weight: 600;
            font-size: 0.95rem;
        }

        .form-input, .form-select, .form-textarea {
            width: 100%;
            padding: 12px 16px;
            border-radius: 10px;
            border: 1px solid #cbd5e1;
            font-size: 0.95rem;
            transition: var(--transition);
        }

        .form-input:focus, .form-select:focus, .form-textarea:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px var(--primary-light);
        }

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

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

        .footer-col h4 {
            color: #fff;
            font-size: 1.1rem;
            margin-bottom: 20px;
        }

        .footer-col ul {
            list-style: none;
        }

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

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

        .footer-col ul li a:hover {
            color: #fff;
        }

        .friend-links-area {
            border-top: 1px solid #334155;
            padding-top: 30px;
            margin-bottom: 30px;
        }

        .friend-links-area h5 {
            color: #cbd5e1;
            margin-bottom: 15px;
        }

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

        .friend-links-list a {
            color: #94a3b8;
            text-decoration: none;
            font-size: 0.9rem;
            transition: var(--transition);
        }

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

        .footer-bottom {
            border-top: 1px solid #334155;
            padding-top: 30px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 20px;
        }

        /* 浮动客服入口 */
        .float-service {
            position: fixed;
            bottom: 30px;
            right: 30px;
            z-index: 999;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .float-btn {
            width: 55px;
            height: 55px;
            background: #fff;
            border-radius: 50%;
            box-shadow: 0 5px 15px rgba(0,0,0,0.15);
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: var(--transition);
            position: relative;
        }

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

        .float-btn-primary {
            background: linear-gradient(45deg, var(--primary), var(--secondary));
            color: #fff;
        }

        .float-popover {
            position: absolute;
            right: 70px;
            bottom: 0;
            background: #fff;
            padding: 20px;
            border-radius: 15px;
            box-shadow: 0 10px 25px rgba(0,0,0,0.15);
            display: none;
            width: 220px;
            text-align: center;
        }

        .float-popover img {
            width: 100%;
            margin-bottom: 10px;
        }

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

        /* 自研AI术语百科 */
        .wiki-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 20px;
        }

        .wiki-card {
            background: #fff;
            padding: 20px;
            border-radius: 15px;
            box-shadow: var(--card-shadow);
            border-left: 4px solid var(--secondary);
        }

        .wiki-card h4 {
            margin-bottom: 8px;
            color: var(--dark);
        }

        .wiki-card p {
            font-size: 0.85rem;
            color: #64748b;
        }

        /* 响应式调整 */
        @media (max-width: 992px) {
            .about-wrap, .training-wrap, .contact-wrap {
                grid-template-columns: 1fr;
            }
            .hero-section {
                padding: 120px 0 70px;
            }
            h1.hero-title {
                font-size: 2.2rem;
            }
        }

        @media (max-width: 768px) {
            .nav-menu {
                position: fixed;
                top: 70px;
                left: -100%;
                width: 100%;
                height: calc(100vh - 70px);
                background: #fff;
                flex-direction: column;
                padding: 30px;
                gap: 20px;
                transition: var(--transition);
                box-shadow: 0 10px 15px rgba(0,0,0,0.05);
            }
            .nav-menu.active {
                left: 0;
            }
            .menu-toggle {
                display: flex;
            }
        }