:root {
            --primary: #4f46e5;
            --primary-dark: #3730a3;
            --text-main: #1f2937;
            --text-muted: #4b5563;
            --bg-light: #f9fafb;
            --bg-white: #ffffff;
            --border-color: #e5e7eb;
            --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
            --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
            --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
            
            /* 彩虹多彩风配色 */
            --rainbow-red: #ff5e62;
            --rainbow-orange: #ff9966;
            --rainbow-yellow: #ffdf00;
            --rainbow-green: #10b981;
            --rainbow-blue: #3b82f6;
            --rainbow-purple: #8b5cf6;
            
            --gradient-rainbow: linear-gradient(135deg, var(--rainbow-red), var(--rainbow-orange), var(--rainbow-green), var(--rainbow-blue), var(--rainbow-purple));
        }

        * {
            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;
            color: var(--text-main);
            background-color: var(--bg-light);
        }

        body {
            line-height: 1.6;
        }

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

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

        section:nth-child(even) {
            background-color: var(--bg-light);
        }

        /* 标题规范 */
        .section-title {
            text-align: center;
            font-size: 2rem;
            margin-bottom: 15px;
            font-weight: 800;
            position: relative;
            background: var(--gradient-rainbow);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            display: inline-block;
            left: 50%;
            transform: translateX(-50%);
        }

        .section-subtitle {
            text-align: center;
            font-size: 1rem;
            color: var(--text-muted);
            margin-bottom: 50px;
            max-width: 700px;
            margin-left: auto;
            margin-right: auto;
        }

        /* 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: 9999px;
            text-decoration: none;
            transition: all 0.3s ease;
            cursor: pointer;
            border: none;
        }

        .btn-rainbow {
            background: var(--gradient-rainbow);
            color: #ffffff;
            box-shadow: 0 4px 15px rgba(255, 94, 98, 0.4);
        }

        .btn-rainbow:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(255, 94, 98, 0.6);
        }

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

        .btn-outline:hover {
            background: var(--primary);
            color: #ffffff;
        }

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

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

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

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

        .logo-text {
            font-size: 1.25rem;
            font-weight: 800;
            background: var(--gradient-rainbow);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

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

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

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

        .nav-toggle {
            display: none;
            font-size: 1.5rem;
            background: none;
            border: none;
            cursor: pointer;
            color: var(--text-main);
        }

        /* 首屏 Hero (无图设计) */
        .hero-section {
            background: radial-gradient(circle at 10% 20%, rgba(255, 94, 98, 0.05) 0%, rgba(67, 203, 255, 0.05) 90%);
            padding: 120px 0 100px 0;
            text-align: center;
            border-bottom: 1px solid var(--border-color);
        }

        .hero-badge {
            display: inline-block;
            padding: 6px 16px;
            background: rgba(79, 70, 229, 0.1);
            color: var(--primary);
            border-radius: 9999px;
            font-size: 0.85rem;
            font-weight: 600;
            margin-bottom: 25px;
            border: 1px solid rgba(79, 70, 229, 0.2);
        }

        .hero-title {
            font-size: 3rem;
            line-height: 1.2;
            font-weight: 800;
            margin-bottom: 25px;
            color: #111827;
        }

        .hero-title span {
            background: var(--gradient-rainbow);
            -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;
            line-height: 1.8;
        }

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

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

        .stat-card {
            background: var(--bg-white);
            padding: 25px;
            border-radius: 12px;
            box-shadow: var(--shadow-sm);
            border-top: 4px solid var(--primary);
            transition: transform 0.3s;
        }

        .stat-card:nth-child(2) { border-top-color: var(--rainbow-orange); }
        .stat-card:nth-child(3) { border-top-color: var(--rainbow-green); }
        .stat-card:nth-child(4) { border-top-color: var(--rainbow-purple); }

        .stat-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-md);
        }

        .stat-number {
            font-size: 2.2rem;
            font-weight: 800;
            color: #111827;
            margin-bottom: 5px;
        }

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

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

        .about-content h3 {
            font-size: 1.5rem;
            margin-bottom: 15px;
            color: #111827;
        }

        .about-content p {
            color: var(--text-muted);
            margin-bottom: 20px;
            line-height: 1.8;
        }

        .about-features {
            list-style: none;
        }

        .about-features li {
            margin-bottom: 12px;
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 500;
        }

        .about-features li::before {
            content: "✓";
            color: var(--rainbow-green);
            font-weight: bold;
        }

        .about-media {
            border-radius: 16px;
            overflow: hidden;
            box-shadow: var(--shadow-lg);
        }

        .about-media img {
            width: 100%;
            display: block;
            transition: transform 0.5s;
        }

        .about-media img:hover {
            transform: scale(1.05);
        }

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

        .service-card {
            background: var(--bg-white);
            padding: 40px 30px;
            border-radius: 16px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            transition: all 0.3s;
            position: relative;
            overflow: hidden;
        }

        .service-card::after {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 4px;
            background: var(--gradient-rainbow);
            opacity: 0;
            transition: opacity 0.3s;
        }

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

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

        .service-icon {
            font-size: 2.5rem;
            margin-bottom: 20px;
        }

        .service-card h3 {
            font-size: 1.3rem;
            margin-bottom: 15px;
            color: #111827;
        }

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

        /* 平台聚合标签云 */
        .platform-box {
            margin-top: 50px;
            padding: 30px;
            background: var(--bg-light);
            border-radius: 16px;
            text-align: center;
        }

        .platform-title {
            font-weight: 700;
            margin-bottom: 20px;
            color: var(--text-main);
        }

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

        .tag {
            padding: 6px 14px;
            background: var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: 9999px;
            font-size: 0.85rem;
            font-weight: 500;
            color: var(--text-muted);
            transition: all 0.2s;
        }

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

        /* 制作流程与步骤 */
        .process-flow {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 30px;
            position: relative;
        }

        .process-step {
            text-align: center;
            position: relative;
        }

        .step-num {
            width: 60px;
            height: 60px;
            border-radius: 50%;
            background: var(--gradient-rainbow);
            color: white;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            font-weight: 800;
            margin: 0 auto 20px auto;
            box-shadow: 0 4px 10px rgba(0,0,0,0.1);
        }

        .process-step h3 {
            font-size: 1.15rem;
            margin-bottom: 10px;
            color: #111827;
        }

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

        /* 对比评测 */
        .review-card {
            background: var(--bg-white);
            border-radius: 16px;
            box-shadow: var(--shadow-md);
            padding: 40px;
            margin-bottom: 40px;
            border: 1px solid var(--border-color);
        }

        .review-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            border-bottom: 1px solid var(--border-color);
            padding-bottom: 20px;
            margin-bottom: 25px;
        }

        .score-box {
            display: flex;
            align-items: center;
            gap: 15px;
        }

        .score-num {
            font-size: 3rem;
            font-weight: 900;
            color: var(--rainbow-red);
            line-height: 1;
        }

        .stars {
            color: #fbbf24;
            font-size: 1.5rem;
        }

        .table-responsive {
            width: 100%;
            overflow-x: auto;
        }

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

        .compare-table th, .compare-table td {
            padding: 16px;
            border-bottom: 1px solid var(--border-color);
        }

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

        .compare-table tr:hover {
            background-color: rgba(79, 70, 229, 0.02);
        }

        .tag-yes {
            color: var(--rainbow-green);
            font-weight: 700;
        }

        .tag-no {
            color: var(--text-muted);
        }

        /* 客户案例中心 */
        .portfolio-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }

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

        .portfolio-card img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            display: block;
        }

        .portfolio-info {
            padding: 20px;
        }

        .portfolio-info h4 {
            margin-bottom: 10px;
            color: #111827;
        }

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

        /* 培训中心 */
        .training-grid {
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            gap: 15px;
        }

        .training-card {
            background: var(--bg-white);
            padding: 20px;
            border-radius: 12px;
            text-align: center;
            border: 1px solid var(--border-color);
            transition: all 0.3s;
        }

        .training-card:hover {
            transform: translateY(-5px);
            border-color: var(--primary);
            box-shadow: var(--shadow-md);
        }

        .training-card h4 {
            font-size: 1rem;
            margin-bottom: 10px;
            color: #111827;
        }

        .training-card p {
            font-size: 0.8rem;
            color: var(--text-muted);
        }

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

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

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

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

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease-out, padding 0.3s ease-out;
            padding: 0 20px;
            color: var(--text-muted);
            border-top: 0 solid var(--border-color);
        }

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

        .faq-icon::after {
            content: '+';
            font-size: 1.2rem;
            font-weight: bold;
        }

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

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

        .user-review-card {
            background: var(--bg-white);
            padding: 30px;
            border-radius: 16px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
        }

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

        .avatar-placeholder {
            width: 45px;
            height: 45px;
            border-radius: 50%;
            background: var(--gradient-rainbow);
            color: white;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: bold;
        }

        .user-info h4 {
            font-size: 0.95rem;
            color: #111827;
        }

        .user-info p {
            font-size: 0.8rem;
            color: var(--text-muted);
        }

        .review-text {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.6;
        }

        /* 自助排查与百科 */
        .knowledge-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
        }

        .kb-card {
            background: var(--bg-white);
            padding: 30px;
            border-radius: 16px;
            border: 1px solid var(--border-color);
        }

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

        .kb-list li {
            padding: 10px 0;
            border-bottom: 1px solid var(--border-color);
        }

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

        .kb-title {
            font-weight: 700;
            color: #111827;
            margin-bottom: 5px;
            display: block;
        }

        .kb-desc {
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        /* 行业资讯 / 知识库 */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }

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

        .news-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-md);
            border-color: var(--primary);
        }

        .news-date {
            font-size: 0.8rem;
            color: var(--primary);
            font-weight: 600;
            margin-bottom: 10px;
            display: block;
        }

        .news-card h4 {
            font-size: 1.1rem;
            margin-bottom: 12px;
            line-height: 1.4;
        }

        .news-card h4 a {
            color: #111827;
            text-decoration: none;
            transition: color 0.3s;
        }

        .news-card h4 a:hover {
            color: var(--primary);
        }

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

        /* 联系我们与表单 */
        .contact-wrapper {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
        }

        .contact-info {
            padding-right: 20px;
        }

        .contact-method {
            margin-bottom: 25px;
        }

        .contact-method h4 {
            font-size: 1.1rem;
            margin-bottom: 5px;
            color: #111827;
        }

        .contact-method p {
            color: var(--text-muted);
        }

        .qr-codes {
            display: flex;
            gap: 30px;
            margin-top: 30px;
        }

        .qr-item {
            text-align: center;
        }

        .qr-item img {
            width: 130px;
            height: 130px;
            border: 1px solid var(--border-color);
            border-radius: 8px;
            padding: 5px;
            background: white;
            margin-bottom: 8px;
        }

        .qr-item p {
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--text-main);
        }

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

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

        .form-group label {
            display: block;
            font-size: 0.9rem;
            font-weight: 600;
            margin-bottom: 8px;
            color: #111827;
        }

        .form-control {
            width: 100%;
            padding: 12px 16px;
            border: 1px solid var(--border-color);
            border-radius: 8px;
            font-size: 0.95rem;
            outline: none;
            transition: border-color 0.3s;
        }

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

        /* 友情链接与页脚 */
        footer {
            background-color: #111827;
            color: #9ca3af;
            padding: 60px 0 30px 0;
            border-top: 1px solid #1f2937;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid #1f2937;
        }

        .footer-brand h3 {
            color: #ffffff;
            font-size: 1.5rem;
            margin-bottom: 15px;
        }

        .footer-links h4 {
            color: #ffffff;
            margin-bottom: 15px;
        }

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

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

        .footer-links ul li a {
            color: #9ca3af;
            text-decoration: none;
            transition: color 0.3s;
        }

        .footer-links ul li a:hover {
            color: #ffffff;
        }

        .friend-links-box {
            margin-top: 30px;
            padding-top: 20px;
            border-top: 1px solid #1f2937;
        }

        .friend-links-box span {
            color: #ffffff;
            font-weight: bold;
            margin-right: 15px;
        }

        .friend-links-box a {
            color: #9ca3af;
            text-decoration: none;
            margin-right: 15px;
            transition: color 0.3s;
        }

        .friend-links-box a:hover {
            color: #ffffff;
        }

        .copyright-area {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding-top: 30px;
            font-size: 0.85rem;
        }

        /* 悬浮侧边栏 */
        .floating-kf {
            position: fixed;
            right: 20px;
            bottom: 80px;
            z-index: 999;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .kf-btn {
            width: 50px;
            height: 50px;
            border-radius: 50%;
            background: var(--gradient-rainbow);
            color: white;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: var(--shadow-lg);
            cursor: pointer;
            text-decoration: none;
            transition: transform 0.3s;
            font-size: 0.8rem;
            font-weight: bold;
            text-align: center;
        }

        .kf-btn:hover {
            transform: scale(1.1);
        }

        /* 响应式媒体查询 */
        @media (max-width: 1024px) {
            .stats-grid { grid-template-columns: repeat(2, 1fr); }
            .service-grid { grid-template-columns: repeat(2, 1fr); }
            .portfolio-grid { grid-template-columns: repeat(2, 1fr); }
            .training-grid { grid-template-columns: repeat(3, 1fr); }
        }

        @media (max-width: 768px) {
            .nav-menu {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 70px;
                left: 0;
                width: 100%;
                background-color: var(--bg-white);
                padding: 20px;
                box-shadow: var(--shadow-md);
                border-bottom: 1px solid var(--border-color);
            }
            .nav-menu.active {
                display: flex;
            }
            .nav-toggle {
                display: block;
            }
            .hero-title { font-size: 2.2rem; }
            .about-grid, .contact-wrapper, .knowledge-grid { grid-template-columns: 1fr; }
            .service-grid, .portfolio-grid, .process-flow, .reviews-grid, .news-grid { grid-template-columns: 1fr; }
            .training-grid { grid-template-columns: repeat(2, 1fr); }
            .footer-grid { grid-template-columns: 1fr; }
        }