:root {
            --primary: #4f46e5;
            --primary-light: #818cf8;
            --secondary: #ec4899;
            --accent: #06b6d4;
            --background: #f8fafc;
            --text-dark: #0f172a;
            --text-gray: #475569;
            --text-light: #94a3b8;
            --white: #ffffff;
            --card-border: rgba(226, 232, 240, 0.8);
            --gradient-vibrant: linear-gradient(135deg, #4f46e5 0%, #ec4899 50%, #06b6d4 100%);
            --gradient-soft: linear-gradient(135deg, #f1f5f9 0%, #e2e8f0 100%);
            --gradient-hero: linear-gradient(120deg, #eef2f6 0%, #f1f5f9 50%, #e0f2fe 100%);
        }

        * {
            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(--background);
            color: var(--text-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 {
            background-color: rgba(255, 255, 255, 0.9);
            backdrop-filter: blur(10px);
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            border-bottom: 1px solid var(--card-border);
            box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
        }

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

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

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

        .ai-page-home-link {
            font-weight: 700;
            color: var(--primary);
            text-decoration: none;
            font-size: 1.1rem;
            transition: color 0.3s;
        }

        .ai-page-home-link:hover {
            color: var(--secondary);
        }

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

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

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

        .nav-btn {
            background: var(--gradient-vibrant);
            color: var(--white) !important;
            padding: 8px 20px;
            border-radius: 20px;
            font-weight: 600;
            transition: transform 0.2s, box-shadow 0.2s;
        }

        .nav-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 4px 12px rgba(79, 70, 229, 0.3);
        }

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

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

        /* 纯文本 Hero 首屏 - 无图片 */
        .hero-section {
            padding: 160px 0 80px;
            background: var(--gradient-hero);
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .hero-section::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -50%;
            width: 200%;
            height: 200%;
            background: radial-gradient(circle, rgba(236,72,153,0.05) 0%, rgba(6,182,212,0.05) 50%, rgba(255,255,255,0) 100%);
            pointer-events: none;
        }

        .hero-tag {
            display: inline-block;
            background: linear-gradient(90deg, rgba(7f, 70, 229, 0.1) 0%, rgba(236, 72, 153, 0.1) 100%);
            border: 1px solid rgba(236, 72, 153, 0.2);
            color: var(--secondary);
            padding: 6px 16px;
            border-radius: 30px;
            font-size: 0.9rem;
            font-weight: 600;
            margin-bottom: 24px;
            text-transform: uppercase;
            letter-spacing: 1px;
        }

        .hero-title {
            font-size: 2.8rem;
            line-height: 1.25;
            color: var(--text-dark);
            margin-bottom: 20px;
            font-weight: 800;
        }

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

        .hero-desc {
            font-size: 1.2rem;
            color: var(--text-gray);
            max-width: 800px;
            margin: 0 auto 35px;
        }

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

        .btn {
            padding: 14px 32px;
            border-radius: 30px;
            font-size: 1rem;
            font-weight: 600;
            text-decoration: none;
            transition: all 0.3s ease;
            display: inline-flex;
            align-items: center;
            justify-content: center;
        }

        .btn-primary {
            background: var(--gradient-vibrant);
            color: var(--white);
            box-shadow: 0 4px 15px rgba(79, 70, 229, 0.3);
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(79, 70, 229, 0.4);
        }

        .btn-secondary {
            background: var(--white);
            color: var(--text-dark);
            border: 1px solid var(--card-border);
        }

        .btn-secondary:hover {
            background: #f1f5f9;
            transform: translateY(-2px);
        }

        /* 基础通用卡片 */
        section {
            padding: 80px 0;
            border-bottom: 1px solid var(--card-border);
        }

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

        .section-header h2 {
            font-size: 2.2rem;
            color: var(--text-dark);
            font-weight: 700;
            margin-bottom: 15px;
        }

        .section-header p {
            color: var(--text-gray);
            font-size: 1.1rem;
            max-width: 600px;
            margin: 0 auto;
        }

        /* 数据指标卡片 */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 20px;
            margin-top: 40px;
        }

        .stat-card {
            background: var(--white);
            padding: 30px 20px;
            border-radius: 16px;
            text-align: center;
            border: 1px solid var(--card-border);
            box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.02);
            transition: transform 0.3s;
        }

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

        .stat-num {
            font-size: 2.5rem;
            font-weight: 800;
            background: var(--gradient-vibrant);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            margin-bottom: 10px;
        }

        .stat-label {
            font-size: 0.95rem;
            color: var(--text-gray);
            font-weight: 500;
        }

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

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

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

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

        .highlight-item {
            background: var(--white);
            padding: 20px;
            border-radius: 12px;
            border: 1px solid var(--card-border);
        }

        .highlight-item h4 {
            color: var(--primary);
            margin-bottom: 8px;
            font-size: 1.1rem;
        }

        .highlight-item p {
            font-size: 0.9rem;
            color: var(--text-gray);
            margin: 0;
        }

        /* AIGC 服务能力卡片 */
        .grid-3 {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 30px;
        }

        .service-card {
            background: var(--white);
            padding: 40px 30px;
            border-radius: 20px;
            border: 1px solid var(--card-border);
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.02);
            transition: all 0.3s ease;
        }

        .service-card:hover {
            transform: translateY(-8px);
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
            border-color: rgba(79, 70, 229, 0.2);
        }

        .service-icon {
            width: 60px;
            height: 60px;
            border-radius: 16px;
            background: linear-gradient(135deg, rgba(79, 70, 229, 0.1) 0%, rgba(6, 182, 212, 0.1) 100%);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.8rem;
            color: var(--primary);
            margin-bottom: 25px;
        }

        .service-card h3 {
            font-size: 1.4rem;
            margin-bottom: 15px;
            color: var(--text-dark);
        }

        .service-card p {
            color: var(--text-gray);
            font-size: 0.95rem;
            margin-bottom: 20px;
        }

        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }

        .tag {
            background: var(--background);
            color: var(--text-gray);
            padding: 4px 10px;
            border-radius: 20px;
            font-size: 0.8rem;
            border: 1px solid var(--card-border);
        }

        /* 流程步骤与时间线 */
        .timeline {
            position: relative;
            max-width: 800px;
            margin: 0 auto;
        }

        .timeline-item {
            padding: 20px 30px;
            position: relative;
            background: var(--white);
            border: 1px solid var(--card-border);
            border-radius: 12px;
            margin-bottom: 20px;
            transition: 0.3s;
        }

        .timeline-item:hover {
            border-color: var(--primary-light);
        }

        .timeline-step {
            position: absolute;
            left: -15px;
            top: 50%;
            transform: translateY(-50%);
            width: 30px;
            height: 30px;
            border-radius: 50%;
            background: var(--gradient-vibrant);
            color: var(--white);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 0.9rem;
            box-shadow: 0 4px 10px rgba(79, 70, 229, 0.2);
        }

        .timeline-content {
            padding-left: 15px;
        }

        .timeline-content h4 {
            font-size: 1.15rem;
            margin-bottom: 5px;
            color: var(--text-dark);
        }

        .timeline-content p {
            color: var(--text-gray);
            font-size: 0.9rem;
            margin: 0;
        }

        /* 对比评测表格 */
        .table-responsive {
            overflow-x: auto;
            background: var(--white);
            border-radius: 16px;
            border: 1px solid var(--card-border);
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.02);
        }

        .comparison-table {
            width: 100%;
            border-collapse: collapse;
            text-align: left;
            min-width: 600px;
        }

        .comparison-table th, .comparison-table td {
            padding: 16px 20px;
            border-bottom: 1px solid var(--card-border);
        }

        .comparison-table th {
            background-color: #f8fafc;
            color: var(--text-dark);
            font-weight: 600;
        }

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

        .comparison-table tr.highlight-row {
            background-color: rgba(79, 70, 229, 0.02);
        }

        .comparison-table tr.highlight-row td {
            font-weight: 600;
        }

        .score-badge {
            background: linear-gradient(135deg, #10b981 0%, #059669 100%);
            color: var(--white);
            padding: 4px 10px;
            border-radius: 20px;
            font-size: 0.85rem;
            font-weight: 600;
            display: inline-block;
        }

        .star-rating {
            color: #f59e0b;
            font-size: 1.1rem;
        }

        /* 案例展示区 - 包含图片展示 */
        .portfolio-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 25px;
        }

        .portfolio-card {
            background: var(--white);
            border-radius: 16px;
            overflow: hidden;
            border: 1px solid var(--card-border);
            transition: transform 0.3s;
        }

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

        .portfolio-img-wrapper {
            position: relative;
            width: 100%;
            overflow: hidden;
            background-color: #e2e8f0;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .portfolio-img-wrapper img {
            width: 100%;
            height: auto;
            display: block;
            object-fit: cover;
        }

        .portfolio-info {
            padding: 24px;
        }

        .portfolio-info h3 {
            font-size: 1.2rem;
            margin-bottom: 10px;
            color: var(--text-dark);
        }

        .portfolio-info p {
            color: var(--text-gray);
            font-size: 0.9rem;
            margin: 0;
        }

        /* 需求表单模块 */
        .form-layout {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: flex-start;
        }

        .form-card {
            background: var(--white);
            padding: 40px;
            border-radius: 20px;
            border: 1px solid var(--card-border);
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.03);
        }

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

        .form-group label {
            display: block;
            margin-bottom: 8px;
            font-weight: 500;
            color: var(--text-dark);
            font-size: 0.95rem;
        }

        .form-control {
            width: 100%;
            padding: 12px 16px;
            border: 1px solid var(--card-border);
            border-radius: 8px;
            font-size: 0.95rem;
            transition: border-color 0.3s;
            background-color: #f8fafc;
            color: var(--text-dark);
        }

        .form-control:focus {
            outline: none;
            border-color: var(--primary);
            background-color: var(--white);
        }

        .form-info-pane {
            padding: 20px;
            background: linear-gradient(135deg, rgba(79, 70, 229, 0.03) 0%, rgba(236, 72, 153, 0.03) 100%);
            border-radius: 16px;
            border: 1px solid rgba(79, 70, 229, 0.1);
        }

        .info-list-item {
            display: flex;
            gap: 15px;
            margin-bottom: 20px;
        }

        .info-icon {
            font-size: 1.5rem;
            color: var(--primary);
            line-height: 1;
        }

        .info-text h5 {
            font-size: 1rem;
            color: var(--text-dark);
            margin-bottom: 4px;
        }

        .info-text p {
            font-size: 0.9rem;
            color: var(--text-gray);
            margin: 0;
        }

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

        .faq-item {
            background: var(--white);
            border-radius: 12px;
            margin-bottom: 12px;
            border: 1px solid var(--card-border);
            overflow: hidden;
        }

        .faq-header {
            padding: 20px 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            user-select: none;
            transition: background-color 0.2s;
        }

        .faq-header:hover {
            background-color: #f8fafc;
        }

        .faq-question {
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--text-dark);
            padding-right: 20px;
        }

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

        .faq-content {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease-out;
            background-color: #fafbfc;
        }

        .faq-text {
            padding: 20px 24px;
            font-size: 0.95rem;
            color: var(--text-gray);
            border-top: 1px solid var(--card-border);
        }

        .faq-item.active .faq-content {
            max-height: 300px;
        }

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

        /* 用户评论卡片 */
        .reviews-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 24px;
        }

        .review-card {
            background: var(--white);
            padding: 30px;
            border-radius: 16px;
            border: 1px solid var(--card-border);
            box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.01);
            position: relative;
        }

        .review-quote {
            font-size: 0.95rem;
            color: var(--text-gray);
            margin-bottom: 20px;
            position: relative;
        }

        .review-user {
            display: flex;
            align-items: center;
            gap: 12px;
            border-top: 1px solid var(--card-border);
            padding-top: 15px;
        }

        .user-avatar {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: var(--gradient-soft);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            color: var(--primary);
        }

        .user-meta h4 {
            font-size: 0.95rem;
            color: var(--text-dark);
            margin: 0;
        }

        .user-meta span {
            font-size: 0.8rem;
            color: var(--text-light);
        }

        /* 词条百科 & 排查指南 */
        .info-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 30px;
        }

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

        .info-box h3 {
            font-size: 1.3rem;
            margin-bottom: 20px;
            color: var(--text-dark);
            border-left: 4px solid var(--primary);
            padding-left: 12px;
        }

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

        .list-unstyled li {
            padding: 10px 0;
            border-bottom: 1px dashed var(--card-border);
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 0.95rem;
        }

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

        .badge-status {
            font-size: 0.8rem;
            padding: 2px 8px;
            border-radius: 12px;
            font-weight: 500;
        }

        .badge-green {
            background-color: rgba(16, 185, 129, 0.1);
            color: #10b981;
        }

        .badge-blue {
            background-color: rgba(59, 130, 246, 0.1);
            color: #3b82f6;
        }

        /* 文章列表 */
        .article-card {
            padding: 15px 0;
            border-bottom: 1px solid var(--card-border);
        }

        .article-card:last-child {
            border-bottom: none;
        }

        .article-card a {
            color: var(--text-dark);
            text-decoration: none;
            font-weight: 500;
            font-size: 1rem;
            transition: color 0.2s;
        }

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

        .article-meta {
            font-size: 0.8rem;
            color: var(--text-light);
            margin-top: 5px;
        }

        /* 侧边悬停客服 */
        .floating-kefu {
            position: fixed;
            right: 20px;
            bottom: 20px;
            z-index: 999;
            background: var(--white);
            border: 1px solid var(--card-border);
            border-radius: 12px;
            box-shadow: 0 10px 25px rgba(0,0,0,0.1);
            width: 60px;
            height: 60px;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: all 0.3s;
        }

        .floating-kefu:hover {
            width: 180px;
            height: 220px;
            flex-direction: column;
            padding: 15px;
        }

        .kefu-icon {
            font-size: 1.5rem;
            color: var(--primary);
        }

        .floating-kefu:hover .kefu-icon {
            display: none;
        }

        .kefu-panel {
            display: none;
            text-align: center;
            width: 100%;
        }

        .floating-kefu:hover .kefu-panel {
            display: block;
        }

        .kefu-panel img {
            width: 120px;
            height: 120px;
            margin: 10px 0;
            border-radius: 8px;
        }

        .kefu-panel p {
            font-size: 0.85rem;
            color: var(--text-dark);
            margin: 0;
            font-weight: 600;
        }

        /* 页脚与友情链接 */
        footer {
            background-color: #0f172a;
            color: #f1f5f9;
            padding: 60px 0 30px;
            font-size: 0.9rem;
        }

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

        .footer-logo-desc h4 {
            font-size: 1.2rem;
            color: var(--white);
            margin-bottom: 15px;
        }

        .footer-logo-desc p {
            color: #94a3b8;
            margin-bottom: 15px;
        }

        .footer-links-col h5 {
            color: var(--white);
            font-size: 1rem;
            margin-bottom: 20px;
        }

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

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

        .footer-links-col ul li a {
            color: #94a3b8;
            text-decoration: none;
            transition: color 0.2s;
        }

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

        .friend-links {
            border-top: 1px solid #1e293b;
            padding-top: 20px;
            margin-top: 20px;
        }

        .friend-links h6 {
            color: #94a3b8;
            margin-bottom: 10px;
            font-size: 0.85rem;
        }

        .friend-links-list {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
        }

        .friend-links-list a {
            color: #64748b;
            text-decoration: none;
            font-size: 0.8rem;
            transition: color 0.2s;
        }

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

        .copyright {
            border-top: 1px solid #1e293b;
            padding-top: 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 15px;
            color: #64748b;
            font-size: 0.8rem;
        }

        /* 响应式媒体查询 */
        @media (max-width: 992px) {
            .hero-title {
                font-size: 2.2rem;
            }
            .about-layout, .form-layout, .info-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 768px) {
            .nav-links {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 70px;
                left: 0;
                width: 100%;
                background-color: var(--white);
                padding: 20px;
                border-bottom: 1px solid var(--card-border);
                box-shadow: 0 4px 6px rgba(0,0,0,0.05);
            }
            .nav-links.active {
                display: flex;
            }
            .menu-toggle {
                display: flex;
            }
            .hero-title {
                font-size: 1.8rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
        }