:root {
            --bg-base: #090514;
            --bg-surface: #130c25;
            --bg-card: #1c1236;
            --primary: #ff007f;
            --secondary: #9b51e0;
            --accent: #00f2fe;
            --text-main: #ffffff;
            --text-muted: #b0a8c3;
            --border: #31215c;
            --glow: 0 0 15px rgba(255, 0, 127, 0.4);
            --gradient: linear-gradient(135deg, #ff007f, #9b51e0);
        }

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

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

        /* 统一容器 */
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
            width: 100%;
        }

        /* 头部导航 */
        header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(9, 5, 20, 0.9);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--border);
        }

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

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

        .ai-page-logo {
            height: 40px;
            display: block;
        }

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

        .nav-menu a {
            color: var(--text-muted);
            text-decoration: none;
            font-size: 14px;
            transition: color 0.3s;
        }

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

        .nav-cta {
            display: flex;
            align-items: center;
            gap: 15px;
        }

        .btn {
            background: var(--gradient);
            color: white;
            border: none;
            padding: 8px 18px;
            border-radius: 5px;
            cursor: pointer;
            font-weight: 600;
            text-decoration: none;
            transition: transform 0.2s, box-shadow 0.2s;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
        }

        .btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 0 15px rgba(255, 0, 127, 0.6);
        }

        .btn-outline {
            background: transparent;
            border: 1px solid var(--primary);
            color: var(--primary);
        }

        .btn-outline:hover {
            background: rgba(255, 0, 127, 0.1);
        }

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

        /* Hero 区域 - 无任何图片 */
        .hero {
            padding-top: 150px;
            padding-bottom: 80px;
            position: relative;
            background: radial-gradient(circle at 50% 30%, rgba(155, 81, 224, 0.15) 0%, rgba(9, 5, 20, 0) 70%);
            text-align: center;
        }

        .hero-badge {
            background: rgba(255, 0, 127, 0.1);
            border: 1px solid var(--primary);
            color: var(--primary);
            padding: 5px 15px;
            border-radius: 20px;
            font-size: 13px;
            font-weight: 600;
            display: inline-block;
            margin-bottom: 20px;
            text-transform: uppercase;
            box-shadow: var(--glow);
        }

        .hero h1 {
            font-size: clamp(28px, 4.5vw, 42px);
            line-height: 1.2;
            margin-bottom: 20px;
            background: linear-gradient(90deg, #ff007f, #9b51e0, #00f2fe);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .hero p {
            font-size: 18px;
            color: var(--text-muted);
            max-width: 800px;
            margin: 0 auto 30px auto;
        }

        .hero-actions {
            display: flex;
            justify-content: center;
            gap: 15px;
            margin-bottom: 50px;
        }

        /* 基础 Section */
        section {
            padding: 80px 0;
            border-bottom: 1px solid var(--border);
            position: relative;
        }

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

        .section-header h2 {
            font-size: 32px;
            margin-bottom: 15px;
            background: linear-gradient(90deg, #ffffff, #9b51e0);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .section-header p {
            color: var(--text-muted);
            max-width: 600px;
            margin: 0 auto;
            font-size: 15px;
        }

        /* 关于我们 */
        .about-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
        }

        .about-text h3 {
            font-size: 24px;
            margin-bottom: 15px;
            color: var(--accent);
        }

        .about-text p {
            color: var(--text-muted);
            margin-bottom: 15px;
        }

        /* 数据指标卡片 */
        .metrics-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 20px;
        }

        .metric-card {
            background: var(--bg-card);
            border: 1px solid var(--border);
            padding: 30px;
            border-radius: 8px;
            text-align: center;
            transition: transform 0.3s;
        }

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

        .metric-number {
            font-size: 40px;
            font-weight: 800;
            color: var(--primary);
            margin-bottom: 10px;
            background: linear-gradient(135deg, #ff007f, #00f2fe);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

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

        /* 服务能力卡片 */
        .services-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 25px;
        }

        .service-card {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: 8px;
            padding: 30px;
            transition: all 0.3s;
            position: relative;
            overflow: hidden;
        }

        .service-card:hover {
            transform: translateY(-5px);
            border-color: var(--accent);
            box-shadow: 0 0 20px rgba(0, 242, 254, 0.2);
        }

        .service-icon {
            font-size: 36px;
            color: var(--accent);
            margin-bottom: 20px;
        }

        .service-card h3 {
            font-size: 20px;
            margin-bottom: 10px;
        }

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

        /* 流程步骤 */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 20px;
        }

        .step-card {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: 8px;
            padding: 25px;
            position: relative;
        }

        .step-num {
            position: absolute;
            top: -20px;
            right: 20px;
            font-size: 48px;
            font-weight: 800;
            color: rgba(255, 0, 127, 0.1);
        }

        .step-card h3 {
            font-size: 18px;
            margin-bottom: 10px;
            color: var(--primary);
        }

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

        /* 技术标准 & 平台系统 */
        .tech-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            justify-content: center;
        }

        .tech-tag {
            background: rgba(49, 33, 92, 0.5);
            border: 1px solid var(--border);
            color: var(--text-main);
            padding: 8px 16px;
            border-radius: 4px;
            font-size: 13px;
            transition: all 0.3s;
        }

        .tech-tag:hover {
            border-color: var(--primary);
            background: var(--primary);
            box-shadow: var(--glow);
        }

        /* 对比评测表格 */
        .table-responsive {
            overflow-x: auto;
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: 8px;
        }

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

        .rating-table th, .rating-table td {
            padding: 15px 20px;
            border-bottom: 1px solid var(--border);
        }

        .rating-table th {
            background: rgba(255, 0, 127, 0.05);
            color: var(--primary);
        }

        .rating-table tr:hover {
            background: rgba(255, 255, 255, 0.02);
        }

        /* 案例与素材图展示 */
        .cases-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 25px;
        }

        .case-card {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: 8px;
            overflow: hidden;
        }

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

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

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

        .case-body {
            padding: 20px;
        }

        .case-body h3 {
            font-size: 18px;
            margin-bottom: 10px;
            color: var(--accent);
        }

        .case-body p {
            color: var(--text-muted);
            font-size: 14px;
        }

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

        .faq-item {
            border: 1px solid var(--border);
            background: var(--bg-card);
            border-radius: 6px;
            margin-bottom: 10px;
            overflow: hidden;
        }

        .faq-header {
            padding: 18px 20px;
            font-weight: 600;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            user-select: none;
            transition: background-color 0.3s;
        }

        .faq-header:hover {
            background: rgba(255, 0, 127, 0.05);
        }

        .faq-header::after {
            content: '+';
            font-size: 20px;
            color: var(--primary);
            transition: transform 0.3s;
        }

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

        .faq-body {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease-out;
            padding: 0 20px;
            color: var(--text-muted);
            font-size: 14px;
        }

        .faq-item.active .faq-body {
            padding: 10px 20px 20px 20px;
        }

        /* 评论卡片 */
        .testimonials-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 20px;
        }

        .comment-card {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: 8px;
            padding: 25px;
            position: relative;
        }

        .comment-text {
            color: var(--text-muted);
            font-style: italic;
            font-size: 14px;
            margin-bottom: 15px;
        }

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

        .comment-info h4 {
            font-size: 15px;
            color: var(--accent);
        }

        .comment-info span {
            font-size: 12px;
            color: var(--text-muted);
        }

        /* 智能匹配表单与联系我们 */
        .contact-grid {
            display: grid;
            grid-template-columns: 1.2fr 0.8fr;
            gap: 40px;
        }

        .contact-form-wrapper {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: 8px;
            padding: 30px;
        }

        .form-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 15px;
            margin-bottom: 15px;
        }

        .form-group {
            margin-bottom: 15px;
        }

        .form-group label {
            display: block;
            margin-bottom: 6px;
            font-size: 13px;
            color: var(--text-muted);
        }

        .form-control {
            width: 100%;
            background: var(--bg-base);
            border: 1px solid var(--border);
            color: var(--text-main);
            padding: 10px;
            border-radius: 4px;
            font-size: 14px;
            outline: none;
            transition: border-color 0.3s;
        }

        .form-control:focus {
            border-color: var(--primary);
        }

        .contact-info {
            display: flex;
            flex-direction: column;
            gap: 25px;
        }

        .info-card {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: 8px;
            padding: 25px;
        }

        .info-card h4 {
            margin-bottom: 10px;
            color: var(--primary);
            font-size: 16px;
        }

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

        .info-qr {
            width: 120px;
            height: 120px;
            margin-top: 10px;
            background: #fff;
            padding: 5px;
            border-radius: 4px;
        }

        .info-qr img {
            width: 100%;
            height: 100%;
        }

        /* 术语百科与文章 */
        .encyclopedia-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 15px;
        }

        .encyclopedia-card {
            background: var(--bg-card);
            border-left: 3px solid var(--primary);
            padding: 15px 20px;
            border-radius: 0 4px 4px 0;
        }

        .encyclopedia-card h4 {
            font-size: 15px;
            margin-bottom: 5px;
        }

        .encyclopedia-card p {
            font-size: 12px;
            color: var(--text-muted);
        }

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

        .article-item {
            border-bottom: 1px solid var(--border);
            padding: 12px 0;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .article-item a {
            color: var(--text-main);
            text-decoration: none;
            font-size: 14px;
            transition: color 0.3s;
        }

        .article-item a:hover {
            color: var(--accent);
        }

        .article-date {
            font-size: 12px;
            color: var(--text-muted);
        }

        /* 页脚 */
        footer {
            background: #05030a;
            border-top: 1px solid var(--border);
            padding: 40px 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 2fr;
            gap: 30px;
            margin-bottom: 30px;
        }

        .footer-col h4 {
            margin-bottom: 15px;
            font-size: 15px;
            color: var(--primary);
        }

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

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

        .footer-col ul li a {
            color: var(--text-muted);
            text-decoration: none;
            font-size: 13px;
            transition: color 0.3s;
        }

        .footer-col ul li a:hover {
            color: var(--accent);
        }

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

        .friend-links a {
            color: var(--text-muted);
            text-decoration: none;
            font-size: 12px;
            background: var(--bg-card);
            padding: 4px 8px;
            border-radius: 3px;
            border: 1px solid var(--border);
            transition: all 0.3s;
        }

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

        .footer-bottom {
            border-top: 1px solid var(--border);
            padding-top: 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 12px;
            color: var(--text-muted);
            flex-wrap: wrap;
            gap: 15px;
        }

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

        .float-btn {
            width: 50px;
            height: 50px;
            background: var(--gradient);
            border-radius: 50%;
            display: flex;
            justify-content: center;
            align-items: center;
            cursor: pointer;
            box-shadow: 0 4px 15px rgba(255, 0, 127, 0.4);
            border: none;
            color: white;
            font-size: 18px;
            position: relative;
        }

        .float-qr-box {
            position: absolute;
            bottom: 60px;
            right: 0;
            background: var(--bg-card);
            border: 1px solid var(--border);
            padding: 15px;
            border-radius: 8px;
            display: none;
            text-align: center;
            width: 160px;
        }

        .float-qr-box img {
            width: 130px;
            height: 130px;
            margin-bottom: 5px;
        }

        .float-qr-box span {
            font-size: 12px;
            color: var(--text-muted);
            display: block;
        }

        /* 移动端菜单激活样式 */
        .nav-menu.active {
            display: flex;
            flex-direction: column;
            position: absolute;
            top: 70px;
            left: 0;
            width: 100%;
            background: var(--bg-surface);
            padding: 20px;
            border-bottom: 1px solid var(--border);
            gap: 15px;
        }

        /* 响应式适配 */
        @media (max-width: 992px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 768px) {
            .nav-menu {
                display: none;
            }
            .nav-toggle {
                display: block;
            }
            .about-grid, .contact-grid {
                grid-template-columns: 1fr;
            }
            .hero-actions {
                flex-direction: column;
                align-items: center;
            }
            .hero-actions .btn {
                width: 100%;
                max-width: 280px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
            .form-row {
                grid-template-columns: 1fr;
            }
        }