:root {
            --bg-base: #07020d;
            --bg-surface: #120924;
            --bg-card: rgba(26, 15, 46, 0.7);
            --primary: #ff007f;
            --secondary: #8a2be2;
            --cyan: #00f0ff;
            --text-main: #ffffff;
            --text-muted: #b5aed4;
            --border-neon: rgba(255, 0, 127, 0.25);
            --border-cyan: rgba(0, 240, 255, 0.25);
            --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            --container-width: 1200px;
        }

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

        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }

        body {
            background-color: var(--bg-base);
            color: var(--text-main);
            font-family: var(--font-family);
            line-height: 1.6;
            overflow-x: hidden;
            background-image: 
                radial-gradient(circle at 10% 20%, rgba(138, 43, 226, 0.15) 0%, transparent 40%),
                radial-gradient(circle at 90% 80%, rgba(255, 0, 127, 0.15) 0%, transparent 40%);
            background-attachment: fixed;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: all 0.3s ease;
        }

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

        section {
            padding: 80px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
        }

        /* 统一标题 */
        .section-header {
            text-align: center;
            margin-bottom: 50px;
        }

        .section-title {
            font-size: 2.2rem;
            font-weight: 800;
            background: linear-gradient(90deg, var(--primary), var(--cyan));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            margin-bottom: 15px;
            letter-spacing: 1px;
            display: inline-block;
        }

        .section-subtitle {
            font-size: 1rem;
            color: var(--text-muted);
            max-width: 600px;
            margin: 0 auto;
        }

        /* 按钮通用 */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 12px 30px;
            font-size: 1rem;
            font-weight: 600;
            border-radius: 8px;
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            cursor: pointer;
            border: none;
            outline: none;
        }

        .btn-primary {
            background: linear-gradient(90deg, var(--primary), var(--secondary));
            color: #fff;
            box-shadow: 0 0 15px rgba(255, 0, 127, 0.4);
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 0 25px rgba(255, 0, 127, 0.7);
        }

        .btn-cyan {
            background: linear-gradient(90deg, #00c6ff, #0072ff);
            color: #fff;
            box-shadow: 0 0 15px rgba(0, 198, 255, 0.4);
        }

        .btn-cyan:hover {
            transform: translateY(-2px);
            box-shadow: 0 0 25px rgba(0, 198, 255, 0.7);
        }

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

        .btn-outline:hover {
            background: rgba(0, 240, 255, 0.1);
            color: #fff;
            box-shadow: 0 0 15px rgba(0, 240, 255, 0.3);
        }

        /* 顶部导航 */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(7, 2, 13, 0.85);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
        }

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

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

        .ai-page-logo {
            height: 40px;
            object-fit: contain;
        }

        .brand-name {
            font-size: 1.4rem;
            font-weight: 800;
            background: linear-gradient(90deg, #fff, var(--text-muted));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

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

        .nav-link {
            font-size: 0.95rem;
            color: var(--text-muted);
            font-weight: 500;
            padding: 5px 0;
            border-bottom: 2px solid transparent;
        }

        .nav-link:hover {
            color: var(--cyan);
            border-bottom-color: var(--cyan);
        }

        .mobile-menu-toggle {
            display: none;
            background: none;
            border: none;
            color: #fff;
            font-size: 1.5rem;
            cursor: pointer;
        }

        /* 首屏 Hero - 无图片 */
        .hero {
            padding-top: 140px;
            padding-bottom: 100px;
            position: relative;
            background: radial-gradient(circle at center, rgba(138, 43, 226, 0.2) 0%, transparent 70%);
            text-align: center;
        }

        .hero-tag {
            display: inline-block;
            padding: 6px 16px;
            background: rgba(255, 0, 127, 0.1);
            border: 1px solid rgba(255, 0, 127, 0.3);
            border-radius: 50px;
            font-size: 0.85rem;
            color: var(--primary);
            margin-bottom: 20px;
            letter-spacing: 1px;
            box-shadow: 0 0 10px rgba(255, 0, 127, 0.1);
        }

        .hero-title {
            font-size: 3rem;
            line-height: 1.2;
            margin-bottom: 25px;
            letter-spacing: -0.5px;
        }

        .hero-title span {
            background: linear-gradient(90deg, var(--primary), var(--cyan));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .hero-desc {
            font-size: 1.2rem;
            color: var(--text-muted);
            max-width: 800px;
            margin: 0 auto 40px auto;
        }

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

        /* 核心数据卡片 */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            margin-top: 20px;
        }

        .stat-card {
            background: var(--bg-card);
            border: 1px solid var(--border-neon);
            border-radius: 12px;
            padding: 25px 15px;
            text-align: center;
            transition: all 0.3s ease;
        }

        .stat-card:hover {
            transform: translateY(-5px);
            border-color: var(--cyan);
            box-shadow: 0 10px 20px rgba(0, 240, 255, 0.1);
        }

        .stat-val {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--cyan);
            margin-bottom: 8px;
        }

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

        /* 关于我们与平台介绍 */
        .about-wrap {
            display: grid;
            grid-template-columns: 1.2fr 0.8fr;
            gap: 40px;
            align-items: center;
        }

        .about-content h3 {
            font-size: 1.8rem;
            margin-bottom: 20px;
            color: #fff;
        }

        .about-content p {
            color: var(--text-muted);
            margin-bottom: 20px;
            font-size: 1.05rem;
        }

        .about-features {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 15px;
            margin-top: 30px;
        }

        .feat-item {
            display: flex;
            align-items: center;
            gap: 10px;
            background: rgba(255, 255, 255, 0.02);
            padding: 12px;
            border-radius: 8px;
            border-left: 3px solid var(--primary);
        }

        .feat-item span {
            font-size: 0.95rem;
            font-weight: 600;
        }

        /* 服务与制作场景 */
        .services-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 25px;
        }

        .service-card {
            background: var(--bg-card);
            border: 1px solid var(--border-neon);
            border-radius: 16px;
            padding: 30px;
            transition: all 0.3s ease;
            position: relative;
            overflow: hidden;
        }

        .service-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 4px;
            background: linear-gradient(90deg, var(--primary), var(--secondary));
            opacity: 0;
            transition: opacity 0.3s ease;
        }

        .service-card:hover {
            transform: translateY(-8px);
            border-color: var(--cyan);
            box-shadow: 0 15px 30px rgba(138, 43, 226, 0.2);
        }

        .service-card:hover::before {
            opacity: 1;
        }

        .service-icon {
            font-size: 2.5rem;
            color: var(--cyan);
            margin-bottom: 20px;
        }

        .service-card h3 {
            font-size: 1.4rem;
            margin-bottom: 12px;
            color: #fff;
        }

        .service-card p {
            color: var(--text-muted);
            font-size: 0.95rem;
            margin-bottom: 15px;
        }

        /* 模型聚合云 */
        .model-cloud {
            background: rgba(255, 255, 255, 0.02);
            border: 1px dashed rgba(255, 255, 255, 0.1);
            border-radius: 16px;
            padding: 30px;
            text-align: center;
            margin-top: 40px;
        }

        .model-cloud-title {
            font-size: 1.1rem;
            color: var(--text-muted);
            margin-bottom: 20px;
        }

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

        .model-tag {
            background: rgba(138, 43, 226, 0.1);
            border: 1px solid rgba(138, 43, 226, 0.3);
            border-radius: 20px;
            padding: 6px 14px;
            font-size: 0.85rem;
            color: var(--text-muted);
            transition: all 0.3s ease;
        }

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

        /* 标准化流程 & 对比评测 */
        .process-steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            position: relative;
        }

        .step-card {
            background: var(--bg-card);
            border: 1px solid var(--border-neon);
            border-radius: 12px;
            padding: 25px;
            text-align: center;
            position: relative;
        }

        .step-num {
            width: 40px;
            height: 40px;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            margin: 0 auto 20px auto;
            box-shadow: 0 0 10px rgba(255, 0, 127, 0.4);
        }

        /* 对比评测表格 */
        .table-responsive {
            width: 100%;
            overflow-x: auto;
            border-radius: 12px;
            border: 1px solid var(--border-neon);
            background: var(--bg-card);
        }

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

        th, td {
            padding: 18px 20px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
        }

        th {
            background: rgba(255, 255, 255, 0.03);
            color: #fff;
            font-weight: 600;
        }

        td {
            color: var(--text-muted);
        }

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

        .highlight-col {
            color: var(--cyan);
            font-weight: 600;
        }

        /* 推荐评分卡片 */
        .rating-badge {
            background: linear-gradient(135deg, rgba(255, 0, 127, 0.2), rgba(0, 240, 255, 0.2));
            border: 1.5px solid var(--primary);
            border-radius: 12px;
            padding: 25px;
            margin-top: 30px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 20px;
        }

        .rating-score {
            font-size: 3.5rem;
            font-weight: 900;
            color: var(--primary);
            text-shadow: 0 0 10px rgba(255, 0, 127, 0.5);
            line-height: 1;
        }

        .rating-stars {
            color: #ffb800;
            font-size: 1.5rem;
            margin-bottom: 5px;
        }

        /* 客户案例中心 - 含图 */
        .cases-grid {
            display: grid;
            grid-template-columns: 2fr 1fr;
            gap: 25px;
        }

        .case-left-wrap {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
        }

        .case-card {
            background: var(--bg-card);
            border-radius: 16px;
            overflow: hidden;
            border: 1px solid var(--border-neon);
            transition: all 0.3s ease;
        }

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

        .case-img-container {
            width: 100%;
            height: 200px;
            overflow: hidden;
            background: #110d24;
        }

        .case-img-container img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }

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

        .case-info {
            padding: 20px;
        }

        .case-info h4 {
            font-size: 1.15rem;
            margin-bottom: 8px;
            color: #fff;
        }

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

        /* 培训证书与计划 */
        .training-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 25px;
        }

        .training-card {
            background: linear-gradient(145deg, rgba(138, 43, 226, 0.05), rgba(0, 240, 255, 0.05));
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: 16px;
            padding: 30px;
            position: relative;
        }

        .training-tag {
            position: absolute;
            top: 20px;
            right: 20px;
            background: var(--cyan);
            color: #000;
            font-size: 0.75rem;
            font-weight: 700;
            padding: 3px 8px;
            border-radius: 4px;
        }

        .training-card h3 {
            margin-bottom: 15px;
            font-size: 1.3rem;
            color: #fff;
        }

        .training-list {
            list-style: none;
            margin-top: 15px;
        }

        .training-list li {
            margin-bottom: 8px;
            font-size: 0.9rem;
            color: var(--text-muted);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .training-list li::before {
            content: "✓";
            color: var(--cyan);
            font-weight: bold;
        }

        /* 智能需求匹配与表单 */
        .form-wrap {
            max-width: 800px;
            margin: 0 auto;
            background: var(--bg-card);
            border: 1px solid var(--border-neon);
            border-radius: 16px;
            padding: 40px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
        }

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

        .form-group {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .form-group.full-width {
            grid-column: span 2;
        }

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

        .form-control {
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.1);
            color: #fff;
            padding: 12px 16px;
            border-radius: 8px;
            font-size: 0.95rem;
            transition: all 0.3s ease;
        }

        .form-control:focus {
            outline: none;
            border-color: var(--cyan);
            box-shadow: 0 0 10px rgba(0, 240, 255, 0.2);
        }

        /* 客户评论区 */
        .reviews-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 25px;
        }

        .review-card {
            background: var(--bg-card);
            border: 1px solid var(--border-neon);
            border-radius: 16px;
            padding: 30px;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .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;
        }

        .review-avatar {
            width: 45px;
            height: 45px;
            border-radius: 50%;
            background: var(--secondary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 1.1rem;
            color: #fff;
        }

        .review-meta h5 {
            font-size: 0.95rem;
            color: #fff;
        }

        .review-meta span {
            font-size: 0.8rem;
            color: var(--cyan);
        }

        /* FAQ 折叠面板 */
        .faq-list {
            max-width: 900px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 15px;
        }

        .faq-item {
            border: 1px solid var(--border-neon);
            border-radius: 8px;
            background: rgba(255, 255, 255, 0.02);
            overflow: hidden;
            transition: all 0.3s ease;
        }

        .faq-trigger {
            width: 100%;
            padding: 20px;
            background: none;
            border: none;
            color: #fff;
            text-align: left;
            font-size: 1.05rem;
            font-weight: 600;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .faq-icon {
            transition: transform 0.3s ease;
            font-size: 1.2rem;
            color: var(--cyan);
        }

        .faq-content {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s cubic-bezier(0, 1, 0, 1);
            background: rgba(255, 255, 255, 0.01);
        }

        .faq-content-inner {
            padding: 0 20px 20px 20px;
            color: var(--text-muted);
            font-size: 0.95rem;
            line-height: 1.6;
        }

        .faq-item.active {
            border-color: var(--cyan);
            background: rgba(255, 255, 255, 0.04);
        }

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

        .faq-item.active .faq-content {
            max-height: 500px; /* 大于实际高度即可 */
            transition: max-height 0.3s cubic-bezier(1, 0, 1, 0);
        }

        /* 自助排查与百科 */
        .help-center-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 30px;
        }

        .help-box {
            background: var(--bg-card);
            border: 1px solid var(--border-cyan);
            border-radius: 12px;
            padding: 30px;
        }

        .help-box h3 {
            font-size: 1.3rem;
            color: var(--cyan);
            margin-bottom: 20px;
            display: flex;
            align-items: center;
            gap: 10px;
        }

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

        .trouble-list li {
            padding: 12px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
        }

        .trouble-list li:last-child {
            border-bottom: none;
        }

        .trouble-q {
            font-weight: 600;
            color: #fff;
            margin-bottom: 5px;
        }

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

        /* 行业资讯 */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 25px;
        }

        .news-card {
            background: var(--bg-card);
            border: 1px solid var(--border-neon);
            border-radius: 12px;
            padding: 25px;
            transition: all 0.3s ease;
        }

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

        .news-card h4 {
            font-size: 1.1rem;
            color: #fff;
            margin-bottom: 12px;
        }

        .news-card p {
            color: var(--text-muted);
            font-size: 0.85rem;
            margin-bottom: 20px;
        }

        .news-links {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .news-link {
            color: var(--cyan);
            font-size: 0.85rem;
            text-decoration: underline;
        }

        /* 侧边浮动客服 */
        .floating-kefu {
            position: fixed;
            right: 20px;
            bottom: 80px;
            z-index: 999;
            background: var(--bg-card);
            border: 1.5px solid var(--primary);
            border-radius: 12px;
            padding: 15px;
            text-align: center;
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.5);
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 8px;
            max-width: 120px;
            transition: transform 0.3s ease;
        }

        .floating-kefu:hover {
            transform: translateY(-5px);
            border-color: var(--cyan);
        }

        .floating-kefu img {
            width: 80px;
            height: 80px;
            border-radius: 4px;
        }

        .floating-kefu span {
            font-size: 0.75rem;
            color: #fff;
            font-weight: bold;
        }

        /* 页脚 */
        .footer {
            background: #050209;
            padding: 60px 0 30px 0;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            color: var(--text-muted);
        }

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

        .footer-brand h4 {
            color: #fff;
            font-size: 1.3rem;
            margin-bottom: 15px;
        }

        .footer-brand p {
            font-size: 0.9rem;
            margin-bottom: 15px;
        }

        .footer-links h5 {
            color: #fff;
            margin-bottom: 15px;
            font-size: 1rem;
        }

        .footer-links ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .footer-links a {
            font-size: 0.9rem;
        }

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

        .friend-links {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 20px;
        }

        .friend-links a {
            background: rgba(255, 255, 255, 0.03);
            border: 1px solid rgba(255, 255, 255, 0.08);
            padding: 5px 10px;
            border-radius: 4px;
            font-size: 0.8rem;
        }

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

        .footer-bottom {
            padding-top: 30px;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 15px;
            font-size: 0.85rem;
        }

        /* 移动端响应式 */
        @media (max-width: 992px) {
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .about-wrap {
                grid-template-columns: 1fr;
            }
            .services-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .cases-grid {
                grid-template-columns: 1fr;
            }
            .training-grid {
                grid-template-columns: 1fr;
            }
            .reviews-grid {
                grid-template-columns: 1fr;
            }
            .help-center-grid {
                grid-template-columns: 1fr;
            }
            .news-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            .nav-list {
                display: none;
                position: absolute;
                top: 70px;
                left: 0;
                right: 0;
                background: #0c051a;
                flex-direction: column;
                padding: 20px;
                border-bottom: 1px solid rgba(255, 255, 255, 0.1);
            }
            .nav-list.active {
                display: flex;
            }
            .mobile-menu-toggle {
                display: block;
            }
            .hero-title {
                font-size: 2.2rem;
            }
            .process-steps {
                grid-template-columns: 1fr;
            }
            .form-grid {
                grid-template-columns: 1fr;
            }
            .form-group.full-width {
                grid-column: span 1;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
        }