/* 变量及基础设置 */
        :root {
            --primary: #6366f1;
            --primary-glow: rgba(99, 102, 241, 0.15);
            --accent-pink: #ec4899;
            --accent-cyan: #06b6d4;
            --accent-yellow: #f59e0b;
            --bg-light: #fafbfe;
            --text-dark: #1e293b;
            --text-muted: #64748b;
            --card-bg: #ffffff;
            --border-color: #e2e8f0;
            --container-max: 1200px;
        }

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

        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 {
            overflow-x: hidden;
            background-image: 
                radial-gradient(circle at 10% 20%, rgba(99, 102, 241, 0.05) 0%, transparent 40%),
                radial-gradient(circle at 90% 80%, rgba(6, 182, 212, 0.05) 0%, transparent 40%),
                radial-gradient(circle at 50% 50%, rgba(236, 72, 153, 0.03) 0%, transparent 50%);
        }

        /* 通用容器与排版 */
        .container {
            width: 100%;
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }

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

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

        .section-tag {
            display: inline-block;
            padding: 6px 16px;
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
            background: var(--primary-glow);
            border-radius: 50px;
            margin-bottom: 16px;
            text-transform: uppercase;
            letter-spacing: 1px;
        }

        .section-title {
            font-size: 32px;
            color: var(--text-dark);
            font-weight: 800;
            margin-bottom: 16px;
        }

        .section-subtitle {
            font-size: 16px;
            color: var(--text-muted);
            max-width: 700px;
            margin: 0 auto;
        }

        /* 按钮样式 */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 12px 28px;
            border-radius: 8px;
            font-size: 16px;
            font-weight: 600;
            text-decoration: none;
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            cursor: pointer;
            border: none;
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--primary), var(--accent-pink));
            color: #fff;
            box-shadow: 0 4px 15px rgba(99, 102, 241, 0.4);
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(99, 102, 241, 0.6);
        }

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

        .btn-secondary:hover {
            background: var(--bg-light);
            border-color: var(--text-muted);
            transform: translateY(-2px);
        }

        /* 顶部导航 */
        header.nav-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.85);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--border-color);
        }

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

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

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

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

        .nav-link {
            text-decoration: none;
            color: var(--text-dark);
            font-size: 14px;
            font-weight: 500;
            transition: color 0.3s;
        }

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

        .nav-btn-box {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        /* 移动端菜单按钮 */
        .menu-toggle {
            display: none;
            flex-direction: column;
            gap: 6px;
            background: none;
            border: none;
            cursor: pointer;
        }

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

        /* Hero首屏 - 严禁包含图片资源 */
        .hero-section {
            background: linear-gradient(135deg, rgba(99, 102, 241, 0.05), rgba(236, 72, 153, 0.05));
            padding: 100px 0;
            position: relative;
            overflow: hidden;
            border-bottom: 1px solid var(--border-color);
        }

        .hero-section::before {
            content: '';
            position: absolute;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(6, 182, 212, 0.15) 0%, transparent 70%);
            top: -100px;
            right: -100px;
            z-index: 1;
            pointer-events: none;
        }

        .hero-content {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 900px;
            margin: 0 auto;
        }

        .hero-h1 {
            font-size: 42px;
            font-weight: 800;
            line-height: 1.25;
            color: var(--text-dark);
            margin-bottom: 24px;
            background: linear-gradient(135deg, #1e293b, #4f46e5);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .hero-p {
            font-size: 18px;
            color: var(--text-muted);
            margin-bottom: 35px;
            line-height: 1.8;
        }

        .hero-btn-group {
            display: flex;
            justify-content: center;
            gap: 16px;
            margin-bottom: 50px;
        }

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

        .metric-card {
            background: var(--card-bg);
            padding: 24px;
            border-radius: 12px;
            border: 1px solid var(--border-color);
            text-align: center;
            transition: transform 0.3s, box-shadow 0.3s;
            box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
        }

        .metric-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 15px -3px rgba(99, 102, 241, 0.1);
        }

        .metric-val {
            font-size: 36px;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 8px;
            background: linear-gradient(135deg, var(--primary), var(--accent-cyan));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

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

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

        .about-text h3 {
            font-size: 24px;
            margin-bottom: 16px;
            color: var(--text-dark);
        }

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

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

        .feature-item {
            background: var(--card-bg);
            padding: 20px;
            border-radius: 8px;
            border: 1px solid var(--border-color);
        }

        .feature-item h4 {
            color: var(--primary);
            margin-bottom: 8px;
            font-size: 16px;
        }

        /* 全平台AIGC服务体系 */
        .service-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .service-card {
            background: var(--card-bg);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 30px;
            transition: all 0.3s;
            position: relative;
            overflow: hidden;
        }

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

        .service-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 20px rgba(0,0,0,0.05);
        }

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

        .service-icon {
            font-size: 32px;
            margin-bottom: 20px;
        }

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

        .service-desc {
            color: var(--text-muted);
            font-size: 14px;
            margin-bottom: 16px;
        }

        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 6px;
        }

        .mini-tag {
            font-size: 11px;
            padding: 3px 8px;
            border-radius: 4px;
            background: var(--bg-light);
            color: var(--text-muted);
            border: 1px solid var(--border-color);
        }

        /* 全自动AIGC制作流程 */
        .flow-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            position: relative;
        }

        .flow-card {
            background: var(--card-bg);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 24px;
            text-align: center;
            position: relative;
        }

        .flow-step-num {
            position: absolute;
            top: -15px;
            left: 50%;
            transform: translateX(-50%);
            width: 30px;
            height: 30px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary), var(--accent-pink));
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 14px;
        }

        /* 全行业解决方案 & 媒体展示 */
        .solution-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
        }

        .solution-media-group {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        .solution-media-row {
            display: flex;
            gap: 20px;
        }

        .media-container {
            border-radius: 12px;
            overflow: hidden;
            border: 1px solid var(--border-color);
            box-shadow: 0 4px 6px rgba(0,0,0,0.05);
            background: #fff;
        }

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

        /* 全国服务网络 & 标准化服务流程 */
        .network-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
        }

        .timeline {
            position: relative;
            padding-left: 30px;
            border-left: 2px solid var(--border-color);
        }

        .timeline-item {
            position: relative;
            margin-bottom: 24px;
        }

        .timeline-item::before {
            content: '';
            position: absolute;
            left: -37px;
            top: 5px;
            width: 12px;
            height: 12px;
            border-radius: 50%;
            background: var(--primary);
            border: 2px solid #fff;
        }

        /* 技术标准 */
        .tech-list {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

        .tech-card {
            background: #fff;
            padding: 24px;
            border-radius: 8px;
            border-left: 4px solid var(--accent-cyan);
            box-shadow: 0 2px 4px rgba(0,0,0,0.02);
        }

        /* 案例中心 & 文章 */
        .case-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .case-card {
            background: var(--card-bg);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            overflow: hidden;
            display: flex;
            flex-direction: column;
        }

        .case-info {
            padding: 20px;
            flex-grow: 1;
        }

        .article-section {
            margin-top: 40px;
            background: #fff;
            padding: 30px;
            border-radius: 12px;
            border: 1px solid var(--border-color);
        }

        .article-list {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .article-item a {
            color: var(--primary);
            text-decoration: none;
            font-weight: 500;
        }

        .article-item a:hover {
            text-decoration: underline;
        }

        /* 对比评测 - 高度要求板块 */
        .eval-section {
            background: linear-gradient(135deg, rgba(6, 182, 212, 0.02), rgba(99, 102, 241, 0.02));
        }

        .eval-summary {
            display: flex;
            justify-content: center;
            gap: 50px;
            margin-bottom: 40px;
            text-align: center;
        }

        .eval-badge {
            background: #fff;
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 20px 40px;
            box-shadow: 0 4px 6px rgba(0,0,0,0.02);
        }

        .eval-score {
            font-size: 48px;
            font-weight: 800;
            color: var(--accent-pink);
        }

        .table-responsive {
            width: 100%;
            overflow-x: auto;
            border: 1px solid var(--border-color);
            border-radius: 8px;
            background: #fff;
        }

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

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

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

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

        .highlight-col {
            background: rgba(99, 102, 241, 0.03);
            font-weight: 600;
        }

        /* Token比价参考 */
        .token-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 20px;
        }

        /* 培训板块 */
        .training-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 30px;
        }

        .training-card {
            background: var(--card-bg);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 30px;
            border-top: 4px solid var(--primary);
        }

        /* 智能需求匹配 (表单) */
        .form-section {
            background: #fff;
            border-radius: 16px;
            border: 1px solid var(--border-color);
            padding: 40px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.03);
        }

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

        .form-group {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .form-group-full {
            grid-column: span 2;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .form-label {
            font-size: 14px;
            font-weight: 600;
            color: var(--text-dark);
        }

        .form-input, .form-select, .form-textarea {
            width: 100%;
            padding: 12px;
            border: 1px solid var(--border-color);
            border-radius: 8px;
            font-size: 14px;
            background: var(--bg-light);
            outline: none;
            transition: border-color 0.3s;
        }

        .form-input:focus, .form-select:focus, .form-textarea:focus {
            border-color: var(--primary);
        }

        /* 用户评论 */
        .comments-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .comment-card {
            background: var(--card-bg);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 24px;
            box-shadow: 0 4px 6px rgba(0,0,0,0.02);
        }

        .comment-header {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 16px;
        }

        .comment-avatar {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--accent-cyan), var(--primary));
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
        }

        .comment-user-info h4 {
            font-size: 16px;
            margin-bottom: 2px;
        }

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

        .comment-body {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.6;
        }

        /* FAQ折叠面板 */
        .faq-grid {
            display: flex;
            flex-direction: column;
            gap: 16px;
            max-width: 800px;
            margin: 0 auto;
        }

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

        .faq-question {
            width: 100%;
            background: none;
            border: none;
            padding: 20px;
            text-align: left;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-dark);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease-out;
            background: var(--bg-light);
        }

        .faq-answer-inner {
            padding: 20px;
            border-top: 1px solid var(--border-color);
            color: var(--text-muted);
            font-size: 14px;
        }

        /* 术语百科与排查表 */
        .help-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 30px;
        }

        .help-box {
            background: #fff;
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 24px;
        }

        .help-box h3 {
            margin-bottom: 16px;
            color: var(--text-dark);
            border-bottom: 2px solid var(--primary-glow);
            padding-bottom: 8px;
        }

        /* 联系我们 */
        .contact-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
        }

        .contact-info {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        .info-card {
            background: #fff;
            padding: 20px;
            border-radius: 8px;
            border: 1px solid var(--border-color);
            display: flex;
            align-items: center;
            gap: 16px;
        }

        .qrcode-box {
            text-align: center;
            background: #fff;
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 24px;
        }

        .qrcode-box img {
            max-width: 180px;
            height: auto;
            margin-bottom: 12px;
        }

        /* 页脚 */
        footer {
            background: #0f172a;
            color: #94a3b8;
            padding: 60px 0 30px 0;
            font-size: 14px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 30px;
            margin-bottom: 40px;
        }

        .footer-col h4 {
            color: #f1f5f9;
            margin-bottom: 20px;
            font-size: 16px;
        }

        .footer-links {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .footer-links a, .footer-links span {
            color: #94a3b8;
            text-decoration: none;
            transition: color 0.3s;
        }

        .footer-links a:hover {
            color: #fff;
        }

        .footer-bottom {
            border-top: 1px solid #1e293b;
            padding-top: 30px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 20px;
        }

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

        .friend-links a {
            color: #64748b;
            text-decoration: none;
            font-size: 12px;
        }

        .friend-links a:hover {
            color: #94a3b8;
        }

        /* 侧边悬浮 */
        .floating-service {
            position: fixed;
            right: 20px;
            bottom: 80px;
            z-index: 99;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .float-btn {
            width: 50px;
            height: 50px;
            border-radius: 50%;
            background: #fff;
            box-shadow: 0 4px 10px rgba(0,0,0,0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            position: relative;
            border: 1px solid var(--border-color);
        }

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

        .popover {
            display: none;
            position: absolute;
            right: 60px;
            bottom: 0;
            background: #fff;
            padding: 16px;
            border-radius: 8px;
            box-shadow: 0 4px 20px rgba(0,0,0,0.15);
            border: 1px solid var(--border-color);
            width: 200px;
            text-align: center;
        }

        .popover img {
            width: 100%;
            height: auto;
        }

        /* 响应式适配 */
        @media (max-width: 1024px) {
            .service-grid, .comments-grid, .tech-list {
                grid-template-columns: repeat(2, 1fr);
            }
            .flow-grid, .metrics-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            .menu-toggle {
                display: flex;
            }
            .nav-menu {
                display: none;
                position: absolute;
                top: 70px;
                left: 0;
                width: 100%;
                background: #fff;
                flex-direction: column;
                padding: 20px;
                border-bottom: 1px solid var(--border-color);
                box-shadow: 0 10px 15px rgba(0,0,0,0.05);
            }
            .nav-menu.active {
                display: flex;
            }
            .nav-btn-box {
                display: none;
            }
            .about-grid, .solution-grid, .network-row, .training-grid, .form-grid, .help-grid, .contact-grid, .footer-grid {
                grid-template-columns: 1fr;
            }
            .form-group-full {
                grid-column: span 1;
            }
            .hero-h1 {
                font-size: 32px;
            }
            .metrics-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }