/* 变量定义与基础重置 */
        :root {
            --primary: #0052cc;
            --primary-hover: #0043a4;
            --secondary: #00b4d8;
            --dark: #0f172a;
            --text: #334155;
            --light-bg: #f8fafc;
            --card-bg: #ffffff;
            --border: #e2e8f0;
            --container-width: 1200px;
        }

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

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

        a {
            color: var(--primary);
            text-decoration: none;
            transition: color 0.3s ease;
        }

        a:hover {
            color: var(--secondary);
        }

        img {
            max-width: 100%;
            height: auto;
            display: inline-block;
        }

        ul {
            list-style: none;
        }

        .container {
            width: 100%;
            max-width: var(--container-width);
            margin: 0 auto;
            padding: 0 24px;
        }

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

        .section-title {
            text-align: center;
            font-size: 2.25rem;
            color: var(--dark);
            margin-bottom: 16px;
            font-weight: 700;
        }

        .section-subtitle {
            text-align: center;
            color: var(--text);
            max-width: 600px;
            margin: 0 auto 48px;
            font-size: 1.1rem;
        }

        /* 顶部导航 */
        header {
            background-color: rgba(255, 255, 255, 0.95);
            border-bottom: 1px solid var(--border);
            position: sticky;
            top: 0;
            z-index: 1000;
            backdrop-filter: blur(8px);
        }

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

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

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

        .logo-text {
            font-size: 1.4rem;
            font-weight: 700;
            color: var(--primary);
        }

        .nav-menu {
            display: flex;
            align-items: center;
            gap: 20px;
        }

        .nav-link {
            font-size: 0.95rem;
            color: var(--dark);
            font-weight: 500;
            padding: 6px 12px;
            border-radius: 4px;
            transition: all 0.3s ease;
        }

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

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

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

        /* Hero 首屏 - 纯文字/渐变背景，无图片 */
        .hero {
            background: linear-gradient(135deg, #e0f2fe 0%, #dbeafe 50%, #eff6ff 100%);
            padding: 120px 0 100px;
            text-align: center;
            border-bottom: none;
            position: relative;
        }

        .hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background-image: radial-gradient(#0052cc 0.5px, transparent 0.5px), radial-gradient(#00b4d8 0.5px, #eff6ff 0.5px);
            background-size: 40px 40px;
            background-position: 0 0, 20px 20px;
            opacity: 0.15;
            z-index: 1;
        }

        .hero-inner {
            position: relative;
            z-index: 2;
            max-width: 900px;
            margin: 0 auto;
        }

        .hero-badge {
            display: inline-block;
            background: rgba(0, 82, 204, 0.1);
            color: var(--primary);
            padding: 8px 16px;
            border-radius: 30px;
            font-weight: 600;
            font-size: 0.9rem;
            margin-bottom: 24px;
            letter-spacing: 1px;
        }

        .hero-title {
            font-size: 3rem;
            font-weight: 800;
            color: var(--dark);
            line-height: 1.25;
            margin-bottom: 24px;
        }

        .hero-desc {
            font-size: 1.25rem;
            color: var(--text);
            margin-bottom: 40px;
            line-height: 1.6;
        }

        .hero-btns {
            display: flex;
            justify-content: center;
            gap: 20px;
            flex-wrap: wrap;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 14px 32px;
            font-size: 1.05rem;
            font-weight: 600;
            border-radius: 8px;
            transition: all 0.3s ease;
            cursor: pointer;
            border: none;
        }

        .btn-primary {
            background-color: var(--primary);
            color: #ffffff;
            box-shadow: 0 4px 14px rgba(0, 82, 204, 0.4);
        }

        .btn-primary:hover {
            background-color: var(--primary-hover);
            transform: translateY(-2px);
            color: #ffffff;
        }

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

        .btn-outline:hover {
            background-color: var(--primary);
            color: #ffffff;
            transform: translateY(-2px);
        }

        /* 统一卡片与布局网格 */
        .grid-3 {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 30px;
        }

        .card {
            background-color: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: 12px;
            padding: 30px;
            transition: all 0.3s ease;
            box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
        }

        .card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
            border-color: var(--primary);
        }

        /* 关于我们与软件介绍 */
        .about-grid {
            display: grid;
            grid-template-columns: 1.2fr 0.8fr;
            gap: 40px;
            align-items: center;
        }

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

        .about-features {
            margin-top: 30px;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
        }

        .feat-item {
            display: flex;
            align-items: flex-start;
            gap: 12px;
        }

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

        /* 数据指标卡片 */
        .stats-bar {
            background-color: var(--dark);
            color: #ffffff;
            padding: 60px 0;
            border-bottom: none;
        }

        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 40px;
            text-align: center;
        }

        .stat-num {
            font-size: 3rem;
            font-weight: 800;
            color: var(--secondary);
            margin-bottom: 8px;
        }

        .stat-label {
            font-size: 1rem;
            color: #94a3b8;
        }

        /* 服务能力标签云 */
        .tags-container {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            justify-content: center;
            max-width: 900px;
            margin: 0 auto;
        }

        .tag-pill {
            background-color: #eff6ff;
            color: var(--primary);
            border: 1px solid rgba(0, 82, 204, 0.15);
            padding: 8px 18px;
            border-radius: 20px;
            font-weight: 500;
            font-size: 0.95rem;
            transition: all 0.2s;
        }

        .tag-pill:hover {
            background-color: var(--primary);
            color: #ffffff;
            transform: scale(1.05);
        }

        /* 全自动制作流程 - 步骤式 */
        .process-flow {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
            gap: 24px;
            position: relative;
        }

        .process-step {
            position: relative;
            background: var(--card-bg);
            border: 1px solid var(--border);
            padding: 30px;
            border-radius: 8px;
            text-align: center;
        }

        .step-num {
            width: 40px;
            height: 40px;
            background-color: var(--primary);
            color: #ffffff;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            margin: 0 auto 20px;
        }

        /* 素材与案例区 */
        .case-gallery {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 24px;
        }

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

        .case-img-box {
            position: relative;
            overflow: hidden;
            background-color: #f1f5f9;
        }

        .case-img-box img {
            width: 100%;
            display: block;
            transition: transform 0.5s ease;
        }

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

        .case-info {
            padding: 20px;
        }

        .case-info h4 {
            color: var(--dark);
            margin-bottom: 8px;
            font-size: 1.15rem;
        }

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

        /* 对比评测表格 */
        .table-responsive {
            overflow-x: auto;
            background-color: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: 12px;
            box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
        }

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

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

        th {
            background-color: #f1f5f9;
            color: var(--dark);
            font-weight: 600;
        }

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

        .rating-box {
            background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
            color: #ffffff;
            border-radius: 12px;
            padding: 40px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 40px;
            flex-wrap: wrap;
            gap: 24px;
        }

        .score-circle {
            background: rgba(255, 255, 255, 0.1);
            border: 2px solid var(--secondary);
            border-radius: 50%;
            width: 120px;
            height: 120px;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
        }

        .score-val {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--secondary);
            line-height: 1.1;
        }

        /* 智能匹配表单 */
        .form-wrapper {
            max-width: 800px;
            margin: 0 auto;
            background-color: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: 16px;
            padding: 40px;
            box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.05);
        }

        .form-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
            margin-bottom: 24px;
        }

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

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

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

        input, select, textarea {
            padding: 12px 16px;
            border: 1px solid var(--border);
            border-radius: 6px;
            font-size: 0.95rem;
            background-color: #fafafa;
            transition: all 0.3s;
            color: var(--dark);
        }

        input:focus, select:focus, textarea:focus {
            outline: none;
            border-color: var(--primary);
            background-color: #ffffff;
            box-shadow: 0 0 0 3px rgba(0, 82, 204, 0.1);
        }

        /* 客户评论 */
        .testimonial-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 30px;
        }

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

        .quote-icon {
            font-size: 2.5rem;
            color: rgba(0, 82, 204, 0.1);
            position: absolute;
            top: 15px;
            right: 20px;
            line-height: 1;
        }

        .user-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            margin-top: 20px;
            border-top: 1px solid var(--border);
            padding-top: 16px;
        }

        .user-info h5 {
            font-size: 1rem;
            color: var(--dark);
            font-weight: 600;
        }

        .user-info span {
            font-size: 0.8rem;
            color: #64748b;
        }

        /* 折叠面板 (FAQ) */
        .faq-accordion {
            max-width: 900px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .faq-item {
            background-color: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: 8px;
            overflow: hidden;
            transition: border-color 0.3s;
        }

        .faq-header {
            padding: 20px 24px;
            font-weight: 600;
            color: var(--dark);
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            user-select: none;
        }

        .faq-icon {
            transition: transform 0.3s;
        }

        .faq-content {
            padding: 0 24px 20px;
            color: var(--text);
            display: none;
            border-top: 1px solid transparent;
        }

        .faq-item.active {
            border-color: var(--primary);
        }

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

        .faq-item.active .faq-content {
            display: block;
            border-top-color: var(--border);
        }

        /* 网站术语与资讯区 */
        .article-area {
            background-color: var(--card-bg);
            border-radius: 12px;
            border: 1px solid var(--border);
            padding: 40px;
            margin-top: 40px;
        }

        .article-title-bar {
            display: flex;
            justify-content: space-between;
            align-items: center;
            border-bottom: 2px solid var(--border);
            padding-bottom: 16px;
            margin-bottom: 24px;
        }

        .article-links {
            display: grid;
            grid-template-columns: 1fr;
            gap: 16px;
        }

        .article-item {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 12px 16px;
            border-radius: 6px;
            background-color: var(--light-bg);
            transition: background-color 0.2s;
        }

        .article-item:hover {
            background-color: #eff6ff;
        }

        /* 页脚与联系我们 */
        footer {
            background-color: var(--dark);
            color: #cbd5e1;
            padding: 80px 0 40px;
            font-size: 0.95rem;
            border-top: none;
        }

        footer h4 {
            color: #ffffff;
            margin-bottom: 24px;
            font-size: 1.1rem;
            font-weight: 600;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.2fr 1.8fr 1fr;
            gap: 48px;
            margin-bottom: 60px;
        }

        .footer-links-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
        }

        .footer-logo-desc p {
            margin: 16px 0 24px;
            line-height: 1.6;
        }

        .contact-info-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .contact-info-list li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
        }

        .qrcode-box {
            background-color: #ffffff;
            padding: 12px;
            border-radius: 8px;
            display: inline-block;
            text-align: center;
            width: 130px;
        }

        .qrcode-box img {
            width: 106px;
            height: 106px;
            display: block;
        }

        .qrcode-box span {
            color: var(--dark);
            font-size: 0.75rem;
            margin-top: 6px;
            display: block;
            font-weight: 600;
        }

        .friend-links {
            border-top: 1px solid #334155;
            padding-top: 30px;
            margin-top: 40px;
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 16px;
            font-size: 0.85rem;
        }

        .friend-links a {
            color: #94a3b8;
            background-color: #1e293b;
            padding: 4px 12px;
            border-radius: 4px;
        }

        .friend-links a:hover {
            color: var(--secondary);
            background-color: #0f172a;
        }

        .copyright-bar {
            border-top: 1px solid #334155;
            padding-top: 30px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 0.85rem;
            color: #64748b;
            flex-wrap: wrap;
            gap: 16px;
        }

        /* 侧边悬浮浮窗 */
        .floating-service {
            position: fixed;
            bottom: 40px;
            right: 30px;
            z-index: 999;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .float-btn {
            width: 50px;
            height: 50px;
            background-color: var(--primary);
            color: #ffffff;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
            cursor: pointer;
            transition: all 0.3s;
            position: relative;
        }

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

        .qr-popover {
            position: absolute;
            bottom: 60px;
            right: 0;
            background: #ffffff;
            border: 1px solid var(--border);
            padding: 16px;
            border-radius: 8px;
            box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
            display: none;
            text-align: center;
            width: 150px;
        }

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

        /* 响应式媒体查询 */
        @media (max-width: 992px) {
            .nav-menu {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 70px;
                left: 0;
                right: 0;
                background-color: #ffffff;
                border-bottom: 1px solid var(--border);
                padding: 20px;
                gap: 15px;
                box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
            }

            .nav-menu.active {
                display: flex;
            }

            .menu-toggle {
                display: flex;
            }

            .about-grid {
                grid-template-columns: 1fr;
            }

            .form-grid {
                grid-template-columns: 1fr;
            }

            .form-group-full {
                grid-column: span 1;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 36px;
            }
        }