:root {
            --primary: #00f0ff;
            --primary-dark: #0072ff;
            --secondary: #ff007f;
            --dark: #0b0f19;
            --light-bg: #f8fafc;
            --text-dark: #0f172a;
            --text-light: #64748b;
            --white: #ffffff;
            --card-shadow: 0 10px 30px rgba(0, 240, 255, 0.08);
            --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;
        }

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

        /* 极致鲜亮风配色强化 */
        .gradient-text {
            background: linear-gradient(135deg, #0072ff, #00f0ff, #ff007f);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            font-weight: 800;
        }

        .gradient-bg {
            background: linear-gradient(135deg, #0b0f19, #1e1b4b, #0b0f19);
        }

        /* 统一容器 */
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
            width: 100%;
        }

        /* 按钮样式 */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 12px 28px;
            border-radius: 50px;
            font-size: 15px;
            font-weight: 600;
            text-decoration: none;
            transition: var(--transition);
            cursor: pointer;
            border: none;
        }

        .btn-primary {
            background: linear-gradient(135deg, #0072ff, #00f0ff);
            color: var(--white);
            box-shadow: 0 4px 15px rgba(0, 114, 255, 0.4);
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(0, 240, 255, 0.6);
        }

        .btn-secondary {
            background: rgba(255, 255, 255, 0.1);
            color: var(--white);
            border: 1px solid rgba(255, 255, 255, 0.2);
            backdrop-filter: blur(10px);
        }

        .btn-secondary:hover {
            background: rgba(255, 255, 255, 0.2);
            transform: translateY(-2px);
        }

        .btn-dark {
            background: var(--dark);
            color: var(--white);
        }

        .btn-dark:hover {
            opacity: 0.9;
            transform: translateY(-2px);
        }

        /* 导航栏 */
        header {
            background: rgba(255, 255, 255, 0.9);
            backdrop-filter: blur(10px);
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            box-shadow: 0 2px 20px rgba(0,0,0,0.05);
            transition: var(--transition);
        }

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

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

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

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

        .nav-link {
            color: var(--text-dark);
            text-decoration: none;
            font-size: 14px;
            font-weight: 500;
            transition: var(--transition);
        }

        .nav-link:hover {
            color: var(--primary-dark);
        }

        .nav-btn-wrap {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .menu-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            cursor: pointer;
        }

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

        /* 首屏 Hero (无任何图片) */
        .hero {
            padding: 160px 0 100px 0;
            background: radial-gradient(circle at 80% 20%, rgba(0, 240, 255, 0.15) 0%, transparent 50%),
                        radial-gradient(circle at 20% 80%, rgba(255, 0, 127, 0.1) 0%, transparent 50%),
                        var(--white);
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: linear-gradient(180deg, rgba(255,255,255,0) 60%, var(--light-bg) 100%);
            pointer-events: none;
        }

        .hero-tag {
            display: inline-block;
            padding: 6px 16px;
            background: rgba(0, 114, 255, 0.1);
            color: var(--primary-dark);
            border-radius: 30px;
            font-size: 14px;
            font-weight: 600;
            margin-bottom: 24px;
            border: 1px solid rgba(0, 114, 255, 0.2);
        }

        h1.hero-title {
            font-size: 44px;
            line-height: 1.25;
            color: var(--text-dark);
            margin-bottom: 24px;
            max-width: 900px;
            margin-left: auto;
            margin-right: auto;
        }

        .hero-desc {
            font-size: 18px;
            color: var(--text-light);
            max-width: 700px;
            margin: 0 auto 40px auto;
        }

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

        /* 模块基础样式 */
        section {
            padding: 80px 0;
        }

        .section-header {
            text-align: center;
            margin-bottom: 50px;
        }

        .section-tag {
            color: var(--secondary);
            font-weight: 700;
            font-size: 14px;
            text-transform: uppercase;
            letter-spacing: 1px;
            display: block;
            margin-bottom: 8px;
        }

        .section-title {
            font-size: 32px;
            color: var(--text-dark);
            font-weight: 700;
        }

        /* 数据指标卡片 */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .stat-card {
            background: var(--white);
            padding: 30px;
            border-radius: 16px;
            text-align: center;
            box-shadow: var(--card-shadow);
            border: 1px solid rgba(0, 240, 255, 0.1);
            transition: var(--transition);
        }

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

        .stat-num {
            font-size: 36px;
            font-weight: 800;
            color: var(--primary-dark);
            margin-bottom: 8px;
        }

        .stat-label {
            font-size: 14px;
            color: var(--text-light);
        }

        /* 服务体系 & 模型支持 */
        .service-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }

        .service-card {
            background: var(--white);
            padding: 40px 30px;
            border-radius: 20px;
            box-shadow: var(--card-shadow);
            border: 1px solid rgba(0, 0, 0, 0.03);
            transition: var(--transition);
        }

        .service-card:hover {
            transform: translateY(-8px);
            box-shadow: 0 15px 40px rgba(0, 114, 255, 0.15);
        }

        .service-icon {
            width: 60px;
            height: 60px;
            background: linear-gradient(135deg, rgba(0, 240, 255, 0.1), rgba(255, 0, 127, 0.05));
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 24px;
            color: var(--primary-dark);
            font-size: 24px;
            font-weight: 700;
        }

        .service-card h3 {
            font-size: 20px;
            margin-bottom: 12px;
            color: var(--text-dark);
        }

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

        /* 标签云组件 */
        .tag-cloud-wrap {
            background: var(--white);
            padding: 40px;
            border-radius: 20px;
            box-shadow: var(--card-shadow);
            margin-top: 40px;
        }

        .tag-cloud-title {
            font-size: 18px;
            margin-bottom: 20px;
            text-align: center;
            font-weight: 600;
        }

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

        .tag-item {
            padding: 8px 16px;
            background: var(--light-bg);
            border: 1px solid rgba(0,0,0,0.05);
            border-radius: 30px;
            font-size: 13px;
            color: var(--text-dark);
            transition: var(--transition);
        }

        .tag-item:hover {
            background: var(--primary-dark);
            color: var(--white);
            transform: scale(1.05);
        }

        /* 流程步骤 */
        .flow-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            position: relative;
        }

        .flow-step {
            background: var(--white);
            padding: 30px;
            border-radius: 16px;
            position: relative;
            z-index: 2;
            border: 1px solid rgba(0, 0, 0, 0.03);
        }

        .flow-num {
            width: 40px;
            height: 40px;
            background: var(--secondary);
            color: var(--white);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            margin-bottom: 20px;
        }

        /* 时间线组件 */
        .timeline {
            position: relative;
            max-width: 800px;
            margin: 40px auto 0 auto;
            padding: 20px 0;
        }

        .timeline::before {
            content: '';
            position: absolute;
            left: 50%;
            top: 0;
            bottom: 0;
            width: 2px;
            background: rgba(0, 114, 255, 0.2);
            transform: translateX(-50%);
        }

        .timeline-item {
            margin-bottom: 40px;
            position: relative;
            width: 50%;
            padding: 0 40px;
        }

        .timeline-item:nth-child(odd) {
            left: 0;
            text-align: right;
        }

        .timeline-item:nth-child(even) {
            left: 50%;
            text-align: left;
        }

        .timeline-badge {
            width: 16px;
            height: 16px;
            border-radius: 50%;
            background: var(--primary-dark);
            position: absolute;
            top: 6px;
            z-index: 10;
        }

        .timeline-item:nth-child(odd) .timeline-badge {
            right: -8px;
        }

        .timeline-item:nth-child(even) .timeline-badge {
            left: -8px;
        }

        .timeline-content {
            background: var(--white);
            padding: 20px;
            border-radius: 12px;
            box-shadow: var(--card-shadow);
        }

        /* 案例展示区 (含图片) */
        .case-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .case-card {
            background: var(--white);
            border-radius: 16px;
            overflow: hidden;
            box-shadow: var(--card-shadow);
            transition: var(--transition);
        }

        .case-card:hover {
            transform: translateY(-6px);
        }

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

        .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: 24px;
        }

        .case-tag {
            font-size: 12px;
            color: var(--secondary);
            font-weight: 600;
            margin-bottom: 8px;
            display: inline-block;
        }

        .case-title {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 10px;
        }

        /* 对比评测表格 */
        .table-responsive {
            overflow-x: auto;
            background: var(--white);
            padding: 30px;
            border-radius: 20px;
            box-shadow: var(--card-shadow);
        }

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

        .compare-table th, .compare-table td {
            padding: 16px 20px;
            border-bottom: 1px solid rgba(0,0,0,0.05);
        }

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

        .compare-table tr:hover td {
            background-color: rgba(0, 240, 255, 0.02);
        }

        .rating-badge {
            background: linear-gradient(135deg, #ff007f, #ff5e62);
            color: var(--white);
            padding: 4px 10px;
            border-radius: 4px;
            font-weight: 700;
            font-size: 14px;
        }

        /* 需求匹配表单 & 联系我们 */
        .form-section-grid {
            display: grid;
            grid-template-columns: 1.2fr 0.8fr;
            gap: 40px;
        }

        .form-wrap {
            background: var(--white);
            padding: 40px;
            border-radius: 24px;
            box-shadow: var(--card-shadow);
            border: 1px solid rgba(0, 240, 255, 0.1);
        }

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

        .form-label {
            display: block;
            font-size: 14px;
            font-weight: 600;
            margin-bottom: 8px;
        }

        .form-control {
            width: 100%;
            padding: 12px 16px;
            border: 1px solid rgba(0, 0, 0, 0.1);
            border-radius: 8px;
            outline: none;
            transition: var(--transition);
            font-family: inherit;
        }

        .form-control:focus {
            border-color: var(--primary-dark);
            box-shadow: 0 0 0 3px rgba(0, 114, 255, 0.15);
        }

        .form-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
        }

        .contact-info-card {
            background: var(--dark);
            color: var(--white);
            padding: 40px;
            border-radius: 24px;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .contact-details h3 {
            font-size: 24px;
            margin-bottom: 20px;
            color: var(--primary);
        }

        .contact-item {
            margin-bottom: 20px;
            display: flex;
            align-items: flex-start;
            gap: 12px;
        }

        .contact-item p {
            color: #94a3b8;
            font-size: 14px;
        }

        .kefu-qrcode {
            background: var(--white);
            padding: 15px;
            border-radius: 12px;
            width: 140px;
            height: 140px;
            margin-top: 20px;
            display: inline-block;
        }

        .kefu-qrcode img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        /* 评论卡片 */
        .testimonial-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .testimonial-card {
            background: var(--white);
            padding: 30px;
            border-radius: 16px;
            box-shadow: var(--card-shadow);
            border-left: 4px solid var(--primary);
        }

        .testi-text {
            font-size: 14px;
            color: var(--text-light);
            margin-bottom: 20px;
            font-style: italic;
        }

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

        .testi-avatar {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: var(--light-bg);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            color: var(--primary-dark);
            border: 1px solid rgba(0,0,0,0.05);
        }

        .testi-name {
            font-weight: 600;
            font-size: 15px;
        }

        .testi-role {
            font-size: 12px;
            color: var(--text-light);
        }

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

        .faq-item {
            background: var(--white);
            margin-bottom: 12px;
            border-radius: 12px;
            overflow: hidden;
            box-shadow: var(--card-shadow);
            border: 1px solid rgba(0,0,0,0.02);
        }

        .faq-trigger {
            padding: 20px 24px;
            width: 100%;
            text-align: left;
            background: none;
            border: none;
            outline: none;
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            color: var(--text-dark);
        }

        .faq-trigger::after {
            content: '+';
            font-size: 22px;
            color: var(--primary-dark);
            transition: var(--transition);
        }

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

        .faq-content {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease-out;
            background: rgba(0, 240, 255, 0.01);
        }

        .faq-content-inner {
            padding: 0 24px 20px 24px;
            color: var(--text-light);
            font-size: 14px;
            border-top: 1px solid rgba(0,0,0,0.02);
        }

        /* 术语百科 & 自助排查 */
        .wiki-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .wiki-card {
            background: var(--white);
            padding: 24px;
            border-radius: 12px;
            border: 1px solid rgba(0,0,0,0.03);
        }

        .wiki-title {
            font-size: 16px;
            font-weight: 700;
            color: var(--primary-dark);
            margin-bottom: 10px;
        }

        /* 行业资讯 & 知识库 */
        .article-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .article-card {
            background: var(--white);
            padding: 24px;
            border-radius: 12px;
            box-shadow: var(--card-shadow);
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .article-title {
            font-size: 16px;
            font-weight: 600;
            line-height: 1.4;
            margin-bottom: 15px;
            color: var(--text-dark);
        }

        .article-link {
            font-size: 14px;
            color: var(--primary-dark);
            text-decoration: none;
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }

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

        /* 友情链接与页脚 */
        footer {
            background-color: var(--dark);
            color: #94a3b8;
            padding: 60px 0 20px 0;
            font-size: 14px;
            border-top: 1px solid rgba(255,255,255,0.05);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.2fr repeat(3, 0.6fr);
            gap: 40px;
            margin-bottom: 40px;
        }

        .footer-brand h4 {
            color: var(--white);
            font-size: 18px;
            margin-bottom: 15px;
        }

        .footer-links h5 {
            color: var(--white);
            margin-bottom: 15px;
            font-size: 15px;
        }

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

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

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

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

        .friend-links {
            border-top: 1px solid rgba(255,255,255,0.05);
            padding: 20px 0;
            display: flex;
            flex-wrap: wrap;
            gap: 15px;
            align-items: center;
        }

        .friend-links span {
            color: var(--white);
            font-size: 14px;
            font-weight: 600;
        }

        .friend-links a {
            color: #64748b;
            text-decoration: none;
            transition: var(--transition);
            font-size: 13px;
        }

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

        .copyright-area {
            border-top: 1px solid rgba(255,255,255,0.05);
            padding-top: 20px;
            text-align: center;
            font-size: 12px;
        }

        /* 侧边浮动栏 */
        .float-bar {
            position: fixed;
            right: 20px;
            bottom: 30px;
            z-index: 999;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .float-item {
            width: 48px;
            height: 48px;
            background: var(--white);
            box-shadow: 0 4px 20px rgba(0,0,0,0.15);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: var(--transition);
            position: relative;
        }

        .float-item:hover {
            background: var(--primary);
            color: var(--white);
        }

        .float-popover {
            position: absolute;
            right: 60px;
            bottom: 0;
            background: var(--white);
            padding: 15px;
            border-radius: 12px;
            box-shadow: 0 4px 20px rgba(0,0,0,0.15);
            display: none;
            width: 150px;
            text-align: center;
        }

        .float-popover img {
            width: 120px;
            height: 120px;
            object-fit: cover;
        }

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

        /* 响应式媒体查询 */
        @media (max-width: 1024px) {
            .stats-grid, .service-grid, .case-grid, .testimonial-grid, .wiki-grid, .article-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .flow-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            h1.hero-title {
                font-size: 32px;
            }
            .menu-toggle {
                display: flex;
            }
            .nav-menu {
                display: none;
                position: absolute;
                top: 70px;
                left: 0;
                right: 0;
                background: var(--white);
                flex-direction: column;
                padding: 20px;
                box-shadow: 0 10px 20px rgba(0,0,0,0.05);
                border-top: 1px solid rgba(0,0,0,0.05);
            }
            .nav-menu.active {
                display: flex;
            }
            .stats-grid, .service-grid, .case-grid, .testimonial-grid, .wiki-grid, .article-grid, .flow-grid {
                grid-template-columns: 1fr;
            }
            .timeline::before {
                left: 20px;
            }
            .timeline-item {
                width: 100%;
                padding-left: 45px;
                padding-right: 0;
                text-align: left !important;
            }
            .timeline-item:nth-child(even) {
                left: 0;
            }
            .timeline-badge {
                left: 12px !important;
            }
            .form-section-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
        }