:root {
            --primary: #ff2a74;
            --primary-hover: #e01b5c;
            --primary-light: #fff0f5;
            --secondary: #7928ca;
            --dark: #0f172a;
            --light: #f8fafc;
            --gray: #64748b;
            --border: #e2e8f0;
            --shadow: 0 10px 30px -10px rgba(255, 42, 116, 0.15);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            background-color: #fdfafb;
            color: var(--dark);
            line-height: 1.6;
            overflow-x: hidden;
        }

        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        /* 顶部导航 */
        header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            background: rgba(255, 255, 255, 0.9);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--border);
            z-index: 1000;
            transition: var(--transition);
        }

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

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

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

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

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

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

        .nav-btn {
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: #fff;
            padding: 8px 18px;
            border-radius: 30px;
            font-size: 14px;
            text-decoration: none;
            font-weight: 600;
            transition: var(--transition);
            box-shadow: var(--shadow);
        }

        .nav-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 15px 30px -5px rgba(255, 42, 116, 0.3);
        }

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

        /* 首屏 Hero 区域 (无图片) */
        .hero-section {
            padding-top: 140px;
            padding-bottom: 80px;
            background: radial-gradient(circle at 80% 20%, rgba(255, 42, 116, 0.08) 0%, rgba(121, 40, 202, 0.05) 50%, transparent 100%);
            text-align: center;
            position: relative;
        }

        .hero-section::before {
            content: '';
            position: absolute;
            top: 10%;
            left: 5%;
            width: 10px;
            height: 10px;
            background: var(--primary);
            border-radius: 50%;
            opacity: 0.3;
            animation: pulse 2s infinite;
        }

        .hero-section::after {
            content: '';
            position: absolute;
            bottom: 15%;
            right: 8%;
            width: 15px;
            height: 15px;
            background: var(--secondary);
            border-radius: 50%;
            opacity: 0.2;
            animation: pulse 3s infinite;
        }

        .badge {
            display: inline-block;
            background: var(--primary-light);
            color: var(--primary);
            padding: 6px 16px;
            border-radius: 50px;
            font-size: 13px;
            font-weight: 600;
            margin-bottom: 20px;
            border: 1px solid rgba(255, 42, 116, 0.2);
            text-transform: uppercase;
            letter-spacing: 1px;
        }

        .hero-title {
            font-size: 44px;
            line-height: 1.25;
            font-weight: 800;
            color: var(--dark);
            margin-bottom: 20px;
        }

        .hero-title span {
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .hero-desc {
            font-size: 18px;
            color: var(--gray);
            max-width: 800px;
            margin: 0 auto 35px auto;
        }

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

        .btn-main {
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: #fff;
            padding: 14px 32px;
            border-radius: 30px;
            font-size: 16px;
            font-weight: 700;
            text-decoration: none;
            transition: var(--transition);
            box-shadow: 0 10px 20px rgba(255, 42, 116, 0.2);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

        .btn-main:hover {
            transform: translateY(-3px);
            box-shadow: 0 20px 40px -5px rgba(255, 42, 116, 0.4);
        }

        .btn-sub {
            background: #fff;
            color: var(--dark);
            border: 1px solid var(--border);
            padding: 14px 32px;
            border-radius: 30px;
            font-size: 16px;
            font-weight: 700;
            text-decoration: none;
            transition: var(--transition);
        }

        .btn-sub:hover {
            background: var(--light);
            border-color: var(--gray);
        }

        /* 数据指标卡片 */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            margin-top: 40px;
        }

        .stat-card {
            background: #fff;
            padding: 24px;
            border-radius: 16px;
            box-shadow: var(--shadow);
            border: 1px solid rgba(255, 42, 116, 0.05);
            transition: var(--transition);
        }

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

        .stat-num {
            font-size: 32px;
            font-weight: 800;
            color: var(--primary);
            margin-bottom: 5px;
        }

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

        /* 通用 Section 结构 */
        section {
            padding: 80px 0;
            border-bottom: 1px solid rgba(255, 42, 116, 0.05);
        }

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

        .section-header h2 {
            font-size: 32px;
            font-weight: 800;
            margin-bottom: 15px;
            color: var(--dark);
        }

        .section-header p {
            color: var(--gray);
            max-width: 600px;
            margin: 0 auto;
        }

        /* 卡片网格布局 */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 30px;
        }

        .service-card {
            background: #fff;
            padding: 30px;
            border-radius: 20px;
            box-shadow: var(--shadow);
            border: 1px solid rgba(255, 42, 116, 0.05);
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }

        .service-card:hover {
            transform: translateY(-5px);
            border-color: rgba(255, 42, 116, 0.2);
        }

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

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

        .service-icon {
            width: 50px;
            height: 50px;
            background: var(--primary-light);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            font-size: 22px;
            margin-bottom: 20px;
            font-weight: bold;
        }

        .service-card h3 {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 12px;
        }

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

        /* 标签云 */
        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            justify-content: center;
            max-width: 900px;
            margin: 30px auto 0 auto;
        }

        .tag-item {
            background: #fff;
            border: 1px solid var(--border);
            padding: 8px 16px;
            border-radius: 30px;
            font-size: 13px;
            color: var(--dark);
            transition: var(--transition);
            cursor: default;
        }

        .tag-item:hover {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
            transform: translateY(-2px);
        }

        /* 流程步骤 */
        .process-steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            position: relative;
        }

        .step-card {
            background: #fff;
            padding: 30px;
            border-radius: 16px;
            box-shadow: var(--shadow);
            position: relative;
            z-index: 2;
        }

        .step-num {
            position: absolute;
            top: -15px;
            left: 20px;
            width: 35px;
            height: 35px;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: #fff;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 14px;
            box-shadow: 0 5px 15px rgba(255, 42, 116, 0.3);
        }

        /* 对比评测表格 */
        .table-responsive {
            width: 100%;
            overflow-x: auto;
            background: #fff;
            border-radius: 16px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
        }

        table {
            width: 100%;
            border-collapse: collapse;
            text-align: left;
            min-width: 800px;
        }

        th, td {
            padding: 16px 24px;
            border-bottom: 1px solid var(--border);
            font-size: 14px;
        }

        th {
            background-color: var(--light);
            font-weight: 700;
            color: var(--dark);
        }

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

        .score-highlight {
            font-size: 24px;
            font-weight: 800;
            color: var(--primary);
        }

        /* 客户案例 */
        .case-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 30px;
        }

        .case-card {
            background: #fff;
            border-radius: 20px;
            overflow: hidden;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
        }

        .case-image-container {
            width: 100%;
            background: var(--light);
            display: flex;
            justify-content: center;
            align-items: center;
            overflow: hidden;
        }

        .case-image-container img {
            width: 100%;
            height: auto;
            max-height: 280px;
            object-fit: cover;
            transition: var(--transition);
        }

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

        .case-content {
            padding: 24px;
        }

        .case-content h3 {
            font-size: 18px;
            margin-bottom: 10px;
        }

        .case-content p {
            font-size: 14px;
            color: var(--gray);
        }

        /* 用户评论 */
        .comments-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

        .comment-card {
            background: #fff;
            padding: 24px;
            border-radius: 16px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
        }

        .comment-user {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 15px;
        }

        .user-avatar {
            width: 45px;
            height: 45px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
        }

        .user-info h4 {
            font-size: 15px;
            font-weight: 700;
        }

        .user-info span {
            font-size: 12px;
            color: var(--gray);
        }

        .comment-text {
            font-size: 14px;
            color: var(--dark);
            font-style: italic;
        }

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

        .faq-item {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: 12px;
            margin-bottom: 15px;
            overflow: hidden;
            transition: var(--transition);
        }

        .faq-question {
            padding: 20px 24px;
            font-weight: 700;
            font-size: 16px;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            transition: var(--transition);
        }

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

        .faq-answer {
            padding: 0 24px;
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease-out, padding 0.3s ease-out;
            font-size: 14px;
            color: var(--gray);
            border-top: 0 solid var(--border);
        }

        .faq-item.active .faq-answer {
            padding: 20px 24px;
            max-height: 200px;
            border-top-width: 1px;
        }

        .faq-icon::after {
            content: '+';
            font-size: 20px;
            font-weight: bold;
        }

        .faq-item.active .faq-icon::after {
            content: '-';
        }

        /* 表单与需求匹配 */
        .form-section-wrapper {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: start;
        }

        .form-info {
            padding: 20px 0;
        }

        .form-info h3 {
            font-size: 24px;
            margin-bottom: 15px;
        }

        .form-container {
            background: #fff;
            padding: 40px;
            border-radius: 20px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
        }

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

        .form-group label {
            display: block;
            font-size: 14px;
            font-weight: 700;
            margin-bottom: 8px;
        }

        .form-control {
            width: 100%;
            padding: 12px 16px;
            border: 1px solid var(--border);
            border-radius: 8px;
            outline: none;
            transition: var(--transition);
            font-size: 14px;
        }

        .form-control:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(255, 42, 116, 0.1);
        }

        .form-btn {
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: #fff;
            border: none;
            width: 100%;
            padding: 14px;
            border-radius: 30px;
            font-size: 16px;
            font-weight: 700;
            cursor: pointer;
            transition: var(--transition);
            box-shadow: var(--shadow);
        }

        .form-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 15px 30px -5px rgba(255, 42, 116, 0.4);
        }

        /* 资讯与知识库 */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 20px;
        }

        .news-card {
            background: #fff;
            padding: 24px;
            border-radius: 12px;
            border: 1px solid var(--border);
            transition: var(--transition);
        }

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

        .news-card h3 {
            font-size: 16px;
            margin-bottom: 12px;
        }

        .news-link {
            color: var(--primary);
            text-decoration: none;
            font-weight: 600;
            font-size: 14px;
            display: inline-flex;
            align-items: center;
            gap: 5px;
        }

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

        /* 浮动客服 */
        .floating-contact {
            position: fixed;
            bottom: 40px;
            right: 40px;
            z-index: 999;
            display: flex;
            flex-direction: column;
            gap: 15px;
        }

        .float-btn {
            width: 50px;
            height: 50px;
            border-radius: 50%;
            background: #fff;
            box-shadow: 0 10px 30px rgba(0,0,0,0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: var(--transition);
            border: 1px solid var(--border);
            position: relative;
        }

        .float-btn:hover {
            background: var(--primary-light);
            transform: scale(1.05);
        }

        .float-btn img {
            width: 24px;
            height: 24px;
        }

        .qr-popover {
            position: absolute;
            bottom: 60px;
            right: 0;
            background: #fff;
            padding: 15px;
            border-radius: 12px;
            box-shadow: 0 15px 40px rgba(0,0,0,0.15);
            border: 1px solid var(--border);
            display: none;
            text-align: center;
            width: 160px;
        }

        .qr-popover img {
            width: 130px;
            height: 130px;
            margin-bottom: 8px;
        }

        .qr-popover p {
            font-size: 12px;
            font-weight: bold;
            color: var(--dark);
        }

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

        /* 页脚 */
        footer {
            background-color: var(--dark);
            color: #fff;
            padding: 60px 0 30px 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.5fr;
            gap: 40px;
            margin-bottom: 40px;
        }

        .footer-logo {
            margin-bottom: 20px;
        }

        .footer-logo img {
            
        }

        .footer-col h4 {
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 20px;
            position: relative;
        }

        .footer-col h4::after {
            content: '';
            position: absolute;
            bottom: -6px;
            left: 0;
            width: 30px;
            height: 2px;
            background-color: var(--primary);
        }

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

        .footer-links li {
            margin-bottom: 12px;
        }

        .footer-links a {
            color: #94a3b8;
            text-decoration: none;
            font-size: 14px;
            transition: var(--transition);
        }

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

        .footer-contact-info {
            font-size: 14px;
            color: #94a3b8;
        }

        .footer-contact-info p {
            margin-bottom: 10px;
        }

        .footer-bottom {
            border-top: 1px solid #1e293b;
            padding-top: 30px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 12px;
            color: #64748b;
        }

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

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

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

        .ai-page-home-link {
            color: var(--primary);
            text-decoration: none;
            font-weight: bold;
        }

        .ai-page-home-link:hover {
            text-decoration: underline;
        }

        /* 动画关键帧 */
        @keyframes pulse {
            0% { transform: scale(1); opacity: 0.3; }
            50% { transform: scale(1.2); opacity: 0.5; }
            100% { transform: scale(1); opacity: 0.3; }
        }

        /* 移动端与响应式适配 */
        @media (max-width: 1024px) {
            .hero-title { font-size: 36px; }
            .stats-grid { grid-template-columns: repeat(2, 1fr); }
            .comments-grid { grid-template-columns: repeat(2, 1fr); }
            .footer-grid { grid-template-columns: repeat(2, 1fr); }
        }

        @media (max-width: 768px) {
            .menu-toggle { display: block; }
            .nav-menu {
                display: none;
                position: absolute;
                top: 70px;
                left: 0;
                right: 0;
                background: #fff;
                flex-direction: column;
                padding: 20px;
                border-bottom: 1px solid var(--border);
                box-shadow: 0 10px 15px rgba(0,0,0,0.05);
            }
            .nav-menu.active { display: flex; }
            .hero-title { font-size: 28px; }
            .hero-desc { font-size: 15px; }
            .hero-buttons { flex-direction: column; align-items: center; }
            .btn-main, .btn-sub { width: 100%; text-align: center; justify-content: center; }
            .stats-grid { grid-template-columns: 1fr; }
            .process-steps { grid-template-columns: 1fr; }
            .case-grid { grid-template-columns: 1fr; }
            .comments-grid { grid-template-columns: 1fr; }
            .form-section-wrapper { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr; }
            .footer-bottom { flex-direction: column; gap: 15px; text-align: center; }
            .floating-contact { bottom: 20px; right: 20px; }
        }