:root {
            --primary: #7c3aed;
            --primary-hover: #6d28d9;
            --secondary: #db2777;
            --bg-light: #faf9ff;
            --text-dark: #1f1a3a;
            --text-muted: #5f5a7a;
            --border-color: #e9e3ff;
            --white: #ffffff;
            --accent-purple: #f3e8ff;
            --gradient-primary: linear-gradient(135deg, #7c3aed 0%, #db2777 100%);
            --shadow-sm: 0 4px 6px -1px rgba(124, 58, 237, 0.05), 0 2px 4px -1px rgba(124, 58, 237, 0.03);
            --shadow-md: 0 10px 15px -3px rgba(124, 58, 237, 0.08), 0 4px 6px -2px rgba(124, 58, 237, 0.05);
            --shadow-lg: 0 20px 25px -5px rgba(124, 58, 237, 0.1), 0 10px 10px -5px rgba(124, 58, 237, 0.04);
        }

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

        html {
            scroll-behavior: smooth;
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            background-color: var(--bg-light);
            color: var(--text-dark);
            line-height: 1.6;
        }

        body {
            position: relative;
            overflow-x: hidden;
        }

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

        section {
            padding: 80px 0;
            border-bottom: 1px solid var(--border-color);
        }

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

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

        .section-title h2::after {
            content: '';
            display: block;
            width: 50px;
            height: 4px;
            background: var(--gradient-primary);
            margin: 8px auto 0;
            border-radius: 2px;
        }

        .section-title p {
            font-size: 1.1rem;
            color: var(--text-muted);
        }

        /* 按钮样式 */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 12px 28px;
            font-size: 1rem;
            font-weight: 600;
            border-radius: 8px;
            transition: all 0.3s ease;
            text-decoration: none;
            cursor: pointer;
            border: none;
        }

        .btn-primary {
            background: var(--gradient-primary);
            color: var(--white);
            box-shadow: 0 4px 14px rgba(124, 58, 237, 0.4);
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(124, 58, 237, 0.6);
        }

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

        .btn-outline:hover {
            background: var(--primary-light);
            transform: translateY(-2px);
        }

        /* 导航栏 */
        header {
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--border-color);
            position: sticky;
            top: 0;
            z-index: 1000;
            transition: all 0.3s ease;
        }

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

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

        .logo-box img {
            max-height: 40px;
            width: auto;
        }

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

        .nav-menu a {
            color: var(--text-dark);
            text-decoration: none;
            font-size: 0.95rem;
            font-weight: 500;
            transition: color 0.3s;
        }

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

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

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

        .menu-toggle span {
            width: 25px;
            height: 3px;
            background: var(--text-dark);
            border-radius: 2px;
            transition: 0.3s;
        }

        /* 首屏 Hero (无图片) */
        .hero {
            background: radial-gradient(circle at 10% 20%, rgba(243, 232, 255, 0.7) 0%, rgba(250, 249, 255, 1) 90%);
            padding: 100px 0;
            position: relative;
            overflow: hidden;
        }

        .hero::before {
            content: '';
            position: absolute;
            top: -10%;
            right: -10%;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(219, 39, 119, 0.1) 0%, transparent 70%);
            z-index: 1;
        }

        .hero::after {
            content: '';
            position: absolute;
            bottom: -10%;
            left: -10%;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(124, 58, 237, 0.1) 0%, transparent 70%);
            z-index: 1;
        }

        .hero-content {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 800px;
            margin: 0 auto;
        }

        .hero-tag {
            display: inline-block;
            background: var(--accent-purple);
            color: var(--primary);
            padding: 6px 16px;
            border-radius: 50px;
            font-size: 0.9rem;
            font-weight: 600;
            margin-bottom: 20px;
            border: 1px solid var(--border-color);
        }

        .hero h1 {
            font-size: 3rem;
            line-height: 1.25;
            color: var(--text-dark);
            margin-bottom: 24px;
        }

        .hero h1 span {
            background: var(--gradient-primary);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .hero p {
            font-size: 1.25rem;
            color: var(--text-muted);
            margin-bottom: 40px;
        }

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

        /* 数据指标卡片 */
        .metrics-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            margin-top: -50px;
            position: relative;
            z-index: 10;
        }

        .metric-card {
            background: var(--white);
            padding: 30px 20px;
            border-radius: 12px;
            text-align: center;
            box-shadow: var(--shadow-md);
            border: 1px solid var(--border-color);
            transition: transform 0.3s;
        }

        .metric-card:hover {
            transform: translateY(-5px);
        }

        .metric-value {
            font-size: 2.2rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 8px;
        }

        .metric-label {
            font-size: 0.95rem;
            color: var(--text-muted);
        }

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

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

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

        .about-features {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
        }

        .about-feat-item {
            background: var(--white);
            padding: 20px;
            border-radius: 8px;
            border: 1px solid var(--border-color);
        }

        .about-feat-item h4 {
            color: var(--primary);
            margin-bottom: 8px;
        }

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

        .service-card {
            background: var(--white);
            padding: 35px 25px;
            border-radius: 12px;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-sm);
            transition: all 0.3s;
        }

        .service-card:hover {
            transform: translateY(-8px);
            box-shadow: var(--shadow-lg);
            border-color: var(--primary);
        }

        .service-icon {
            width: 50px;
            height: 50px;
            background: var(--accent-purple);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 20px;
            color: var(--primary);
            font-size: 1.5rem;
        }

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

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

        /* 流程步骤 */
        .steps-container {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 25px;
            position: relative;
        }

        .step-item {
            background: var(--white);
            padding: 30px 20px;
            border-radius: 12px;
            text-align: center;
            border: 1px solid var(--border-color);
            position: relative;
        }

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

        .step-item h3 {
            font-size: 1.15rem;
            margin-bottom: 10px;
        }

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

        /* 解决方案 */
        .solutions-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }

        .solution-card {
            background: var(--white);
            border-radius: 12px;
            overflow: hidden;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-sm);
        }

        .solution-header {
            background: var(--gradient-primary);
            color: var(--white);
            padding: 25px;
            text-align: center;
        }

        .solution-body {
            padding: 25px;
        }

        .solution-body ul {
            list-style: none;
            padding: 0;
        }

        .solution-body li {
            margin-bottom: 12px;
            font-size: 0.95rem;
            color: var(--text-muted);
            position: relative;
            padding-left: 20px;
        }

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

        /* 标签云与模型库 */
        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            justify-content: center;
            margin-top: 30px;
        }

        .tag-item {
            background: var(--white);
            border: 1px solid var(--border-color);
            padding: 8px 18px;
            border-radius: 50px;
            font-size: 0.9rem;
            color: var(--text-dark);
            transition: all 0.3s;
        }

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

        /* 案例中心 (包含真实图片) */
        .case-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 30px;
        }

        .case-card {
            background: var(--white);
            border-radius: 12px;
            overflow: hidden;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-sm);
        }

        .case-img-wrap {
            width: 100%;
            background: var(--accent-purple);
            overflow: hidden;
            display: flex;
            align-items: center;
            justify-content: center;
        }

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

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

        .case-info {
            padding: 25px;
        }

        .case-info h3 {
            font-size: 1.3rem;
            margin-bottom: 10px;
            color: var(--text-dark);
        }

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

        /* 对比评测 (满足要求五) */
        .eval-container {
            background: var(--white);
            border-radius: 16px;
            border: 1px solid var(--border-color);
            padding: 40px;
            box-shadow: var(--shadow-lg);
        }

        .eval-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 30px;
            border-bottom: 1px solid var(--border-color);
            padding-bottom: 20px;
        }

        .eval-rating {
            display: flex;
            align-items: center;
            gap: 15px;
        }

        .eval-score {
            font-size: 3rem;
            font-weight: 800;
            color: var(--primary);
        }

        .eval-stars {
            color: #f59e0b;
            font-size: 1.5rem;
        }

        .eval-table-wrapper {
            overflow-x: auto;
        }

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

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

        .eval-table th {
            background-color: var(--bg-light);
            color: var(--text-dark);
            font-weight: 600;
        }

        .eval-table td strong {
            color: var(--primary);
        }

        /* 需求匹配表单 & 联系我们 */
        .contact-grid {
            display: grid;
            grid-template-columns: 1.2fr 0.8fr;
            gap: 50px;
        }

        .form-card {
            background: var(--white);
            padding: 40px;
            border-radius: 16px;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-md);
        }

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

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

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

        .form-group label {
            display: block;
            margin-bottom: 8px;
            font-weight: 600;
            color: var(--text-dark);
        }

        .form-control {
            width: 100%;
            padding: 12px;
            border: 1px solid var(--border-color);
            border-radius: 8px;
            background: var(--bg-light);
            color: var(--text-dark);
            font-size: 0.95rem;
            outline: none;
            transition: border-color 0.3s;
        }

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

        .contact-info-card {
            background: var(--white);
            padding: 40px;
            border-radius: 16px;
            border: 1px solid var(--border-color);
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .qrcode-box {
            text-align: center;
            margin: 20px 0;
            padding: 15px;
            border: 1px dashed var(--primary);
            border-radius: 12px;
        }

        .qrcode-box img {
            max-width: 150px;
            height: auto;
            border-radius: 8px;
        }

        /* 资讯文章列表 */
        .articles-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }

        .article-card {
            background: var(--white);
            border-radius: 12px;
            border: 1px solid var(--border-color);
            padding: 25px;
            box-shadow: var(--shadow-sm);
            transition: transform 0.3s;
        }

        .article-card:hover {
            transform: translateY(-5px);
        }

        .article-card h3 {
            font-size: 1.15rem;
            margin-bottom: 12px;
        }

        .article-card a {
            color: var(--primary);
            text-decoration: none;
            font-weight: 600;
            font-size: 0.95rem;
            display: inline-block;
            margin-top: 15px;
        }

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

        .faq-item {
            background: var(--white);
            border: 1px solid var(--border-color);
            border-radius: 8px;
            margin-bottom: 15px;
            overflow: hidden;
        }

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

        .faq-answer {
            padding: 0 20px;
            max-height: 0;
            overflow: hidden;
            transition: all 0.3s ease;
            color: var(--text-muted);
            font-size: 0.95rem;
        }

        .faq-item.active .faq-answer {
            padding-bottom: 20px;
            max-height: 200px;
        }

        /* 用户评论 */
        .comments-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }

        .comment-card {
            background: var(--white);
            padding: 30px;
            border-radius: 12px;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-sm);
        }

        .comment-text {
            font-style: italic;
            color: var(--text-muted);
            margin-bottom: 20px;
            font-size: 0.95rem;
        }

        .comment-user {
            display: flex;
            align-items: center;
            gap: 15px;
        }

        .comment-avatar {
            width: 45px;
            height: 45px;
            border-radius: 50%;
            background: var(--accent-purple);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
        }

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

        .comment-info span {
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        /* 友情链接与页脚 */
        footer {
            background: #110d26;
            color: #b9b5d9;
            padding: 60px 0 30px;
            border-top: 1px solid #231f3c;
        }

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

        .footer-logo img {
            max-height: 40px;
            margin-bottom: 15px;
        }

        .footer-col h4 {
            color: var(--white);
            margin-bottom: 20px;
            font-size: 1.1rem;
        }

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

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

        .footer-col ul li a {
            color: #b9b5d9;
            text-decoration: none;
            transition: color 0.3s;
        }

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

        .friend-links {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 15px;
        }

        .friend-links a {
            color: #b9b5d9;
            text-decoration: none;
            background: #231f3c;
            padding: 4px 10px;
            border-radius: 4px;
            font-size: 0.85rem;
            transition: all 0.3s;
        }

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

        .footer-bottom {
            border-top: 1px solid #231f3c;
            padding-top: 30px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 0.85rem;
        }

        /* 悬浮侧栏 */
        .floating-contact {
            position: fixed;
            right: 20px;
            bottom: 20px;
            z-index: 999;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .float-btn {
            width: 50px;
            height: 50px;
            border-radius: 50%;
            background: var(--white);
            box-shadow: var(--shadow-lg);
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            border: 1px solid var(--border-color);
            transition: all 0.3s;
            text-decoration: none;
            color: var(--primary);
            font-size: 1.2rem;
            position: relative;
        }

        .float-btn:hover {
            background: var(--primary);
            color: var(--white);
            transform: scale(1.1);
        }

        .float-btn .tooltip {
            position: absolute;
            right: 60px;
            background: var(--white);
            border: 1px solid var(--border-color);
            padding: 10px;
            border-radius: 8px;
            box-shadow: var(--shadow-md);
            display: none;
            text-align: center;
            min-width: 140px;
        }

        .float-btn .tooltip img {
            width: 100px;
            height: 100px;
        }

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

        /* 响应式适配 */
        @media (max-width: 1024px) {
            .metrics-grid, .services-grid, .steps-container, .solutions-grid, .articles-grid, .comments-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .about-grid, .contact-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
        }

        @media (max-width: 768px) {
            .hero h1 {
                font-size: 2.2rem;
            }
            .nav-menu {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 70px;
                left: 0;
                width: 100%;
                background: var(--white);
                border-bottom: 1px solid var(--border-color);
                padding: 20px;
                box-shadow: var(--shadow-md);
                gap: 15px;
            }
            .nav-menu.active {
                display: flex;
            }
            .menu-toggle {
                display: flex;
            }
            .metrics-grid, .services-grid, .steps-container, .solutions-grid, .case-grid, .articles-grid, .comments-grid {
                grid-template-columns: 1fr;
            }
            .form-grid {
                grid-template-columns: 1fr;
            }
            .form-group-full {
                grid-column: span 1;
            }
        }