/* 全局变量与基础重置 */
        :root {
            --primary-color: #2563eb;
            --primary-hover: #1d4ed8;
            --secondary-color: #06b6d4;
            --accent-color: #f59e0b;
            --text-main: #0f172a;
            --text-muted: #475569;
            --bg-main: #f8fafc;
            --bg-card: #ffffff;
            --bg-alt: #f1f5f9;
            --border-color: #e2e8f0;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.05);
            --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
            --shadow-lg: 0 10px 25px rgba(37,99,235,0.12);
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
        }

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

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

        /* 统一主容器 */
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
            width: 100%;
        }

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

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
        }

        .brand-logo {
            display: flex;
            align-items: center;
            gap: 12px;
            text-decoration: none;
        }

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

        .brand-text {
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--primary-color);
            letter-spacing: -0.5px;
        }

        /* Nav-links Gap 要求为 0 */
        .nav-links {
            display: flex;
            align-items: center;
            gap: 0;
            list-style: none;
        }

        .nav-links li a {
            display: block;
            padding: 8px 14px;
            color: var(--text-main);
            font-weight: 500;
            font-size: 0.95rem;
            text-decoration: none;
            transition: color 0.2s ease, background-color 0.2s ease;
            border-radius: var(--radius-sm);
        }

        .nav-links li a:hover {
            color: var(--primary-color);
            background-color: var(--bg-alt);
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 10px 22px;
            font-size: 0.95rem;
            font-weight: 600;
            border-radius: var(--radius-md);
            text-decoration: none;
            transition: all 0.25s ease;
            cursor: pointer;
            border: none;
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
            color: #ffffff;
            box-shadow: 0 4px 14px rgba(37,99,235,0.3);
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(37,99,235,0.4);
            color: #ffffff;
        }

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

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

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

        /* 统一 Section 排版 */
        section {
            padding: 70px 0;
            border-bottom: 1px solid var(--border-color);
        }

        .section-header {
            text-align: center;
            max-width: 800px;
            margin: 0 auto 50px auto;
        }

        .section-tag {
            display: inline-block;
            padding: 4px 14px;
            background: rgba(37, 99, 235, 0.1);
            color: var(--primary-color);
            font-size: 0.85rem;
            font-weight: 700;
            border-radius: 50px;
            margin-bottom: 12px;
            text-transform: uppercase;
        }

        .section-title {
            font-size: 2.1rem;
            color: var(--text-main);
            font-weight: 800;
            line-height: 1.3;
            margin-bottom: 16px;
        }

        .section-desc {
            font-size: 1.05rem;
            color: var(--text-muted);
        }

        /* Hero 区域 - 严禁出现图片 */
        .hero-section {
            background: linear-gradient(180deg, #eff6ff 0%, #f8fafc 100%);
            padding: 90px 0 70px 0;
            text-align: center;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: #ffffff;
            border: 1px solid var(--border-color);
            padding: 6px 18px;
            border-radius: 50px;
            font-size: 0.9rem;
            color: var(--primary-color);
            box-shadow: var(--shadow-sm);
            margin-bottom: 24px;
        }

        .hero-title-h1 {
            font-size: 2.5rem;
            font-weight: 900;
            color: var(--text-main);
            line-height: 1.25;
            margin-bottom: 20px;
            letter-spacing: -0.5px;
        }

        .hero-subtitle {
            font-size: 1.2rem;
            color: var(--text-muted);
            max-width: 860px;
            margin: 0 auto 36px auto;
            line-height: 1.7;
        }

        .hero-actions {
            display: flex;
            justify-content: center;
            align-items: center;
            gap: 16px;
            margin-bottom: 50px;
            flex-wrap: wrap;
        }

        .hero-stats {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            max-width: 1000px;
            margin: 0 auto;
        }

        .stat-card {
            background: var(--bg-card);
            padding: 24px 16px;
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-sm);
            transition: transform 0.2s ease;
        }

        .stat-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }

        .stat-number {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--primary-color);
        }

        .stat-label {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-top: 4px;
        }

        /* 平台介绍 & 服务 */
        .grid-3 {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .grid-4 {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .grid-2 {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 30px;
        }

        .card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 28px;
            transition: all 0.3s ease;
            box-shadow: var(--shadow-sm);
        }

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

        .card-icon {
            width: 48px;
            height: 48px;
            background: rgba(37, 99, 235, 0.1);
            color: var(--primary-color);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            font-weight: bold;
            margin-bottom: 20px;
        }

        .card-title {
            font-size: 1.25rem;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--text-main);
        }

        .card-text {
            color: var(--text-muted);
            font-size: 0.95rem;
            line-height: 1.6;
        }

        /* 自动化制作与功能池 */
        .feature-tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 20px;
        }

        .model-chip {
            background: #e0f2fe;
            color: #0369a1;
            padding: 6px 14px;
            border-radius: 50px;
            font-size: 0.85rem;
            font-weight: 600;
        }

        /* 对比评测 Block */
        .eval-box {
            background: linear-gradient(135deg, #ffffff 0%, #f0f9ff 100%);
            border: 2px solid var(--primary-color);
            border-radius: var(--radius-lg);
            padding: 36px;
            box-shadow: var(--shadow-md);
            margin-bottom: 40px;
        }

        .eval-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            border-bottom: 1px solid var(--border-color);
            padding-bottom: 20px;
            margin-bottom: 24px;
            flex-wrap: wrap;
            gap: 16px;
        }

        .rating-badge {
            background: #fef3c7;
            color: #d97706;
            padding: 10px 20px;
            border-radius: 50px;
            font-weight: 800;
            font-size: 1.1rem;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .table-wrapper {
            overflow-x: auto;
            background: #ffffff;
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
        }

        table {
            width: 100%;
            border-collapse: collapse;
            text-align: left;
            font-size: 0.95rem;
        }

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

        th {
            background: var(--bg-alt);
            font-weight: 700;
            color: var(--text-main);
        }

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

        .highlight-cell {
            background: rgba(37, 99, 235, 0.05);
            font-weight: 700;
            color: var(--primary-color);
        }

        /* 案例展示 */
        .case-gallery {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }

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

        .case-card-body {
            padding: 20px;
        }

        .case-card-body h3 {
            font-size: 1.1rem;
            margin-bottom: 8px;
        }

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

        /* 客户评论 */
        .review-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 24px;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-sm);
        }

        .review-user {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-top: 16px;
        }

        .user-avatar {
            width: 44px;
            height: 44px;
            background: var(--primary-color);
            color: #ffffff;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
        }

        /* 表单与需求匹配 */
        .form-container {
            background: #ffffff;
            border-radius: var(--radius-lg);
            padding: 40px;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-md);
        }

        .form-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
        }

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

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

        label {
            font-weight: 600;
            font-size: 0.9rem;
            color: var(--text-main);
        }

        input, select, textarea {
            width: 100%;
            padding: 12px 16px;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            font-size: 0.95rem;
            transition: border-color 0.2s ease;
            background: #ffffff;
            color: var(--text-main);
        }

        input:focus, select:focus, textarea:focus {
            outline: none;
            border-color: var(--primary-color);
            box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
        }

        /* FAQ 折叠面板 */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

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

        .faq-question {
            width: 100%;
            padding: 20px;
            text-align: left;
            background: none;
            border: none;
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--text-main);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .faq-answer {
            padding: 0 20px 20px 20px;
            color: var(--text-muted);
            font-size: 0.95rem;
            display: none;
        }

        .faq-item.active .faq-answer {
            display: block;
        }

        .faq-item.active .faq-icon {
            transform: rotate(180deg);
        }

        .faq-icon {
            transition: transform 0.2s ease;
        }

        /* 文章板块 */
        .article-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 20px;
            border: 1px solid var(--border-color);
            text-decoration: none;
            color: var(--text-main);
            display: block;
            transition: all 0.2s ease;
        }

        .article-card:hover {
            border-color: var(--primary-color);
            transform: translateY(-2px);
        }

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

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

        .footer-col h4 {
            color: #ffffff;
            font-size: 1.1rem;
            margin-bottom: 20px;
        }

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

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

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

        .friendship-links {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            margin-top: 10px;
        }

        .friendship-links a {
            color: #94a3b8;
            text-decoration: none;
            background: rgba(255,255,255,0.05);
            padding: 4px 10px;
            border-radius: 4px;
            font-size: 0.85rem;
        }

        .friendship-links a:hover {
            color: #ffffff;
            background: rgba(255,255,255,0.15);
        }

        .qr-code-box {
            text-align: center;
        }

        .qr-code-box img {
            width: 130px;
            height: 130px;
            border-radius: var(--radius-sm);
            background: #ffffff;
            padding: 6px;
        }

        .footer-bottom {
            border-top: 1px solid #1e293b;
            padding-top: 24px;
            text-align: center;
            font-size: 0.85rem;
        }

        /* 浮动客服 */
        .floating-kefu {
            position: fixed;
            right: 20px;
            bottom: 30px;
            z-index: 999;
            background: var(--primary-color);
            color: #ffffff;
            padding: 12px 20px;
            border-radius: 50px;
            box-shadow: 0 10px 25px rgba(37,99,235,0.4);
            display: flex;
            align-items: center;
            gap: 10px;
            text-decoration: none;
            font-weight: 600;
            transition: transform 0.2s ease;
        }

        .floating-kefu:hover {
            transform: scale(1.05);
            color: #ffffff;
        }

        /* 响应式调整 */
        @media (max-width: 992px) {
            .grid-4, .grid-3 {
                grid-template-columns: repeat(2, 1fr);
            }
            .hero-stats {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .case-gallery {
                grid-template-columns: 1fr;
            }
        }

        @media (max-width: 768px) {
            .nav-links {
                display: none;
                position: absolute;
                top: 72px;
                left: 0;
                width: 100%;
                background: #ffffff;
                flex-direction: column;
                padding: 20px;
                box-shadow: var(--shadow-md);
                border-bottom: 1px solid var(--border-color);
            }
            .nav-links.active {
                display: flex;
            }
            .mobile-menu-btn {
                display: block;
            }
            .hero-title-h1 {
                font-size: 1.8rem;
            }
            .grid-4, .grid-3, .grid-2 {
                grid-template-columns: 1fr;
            }
            .form-grid {
                grid-template-columns: 1fr;
            }
            .form-group.full-width {
                grid-column: span 1;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
        }