/* 全局基础样式 - 优化大气感 */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: "Microsoft Yahei", "PingFang SC", sans-serif; /* 增加苹方提升质感 */
        }
        body {
            color: #2c3e50; /* 更深的文字色，提升专业感 */
            background-color: #f5f7fa; /* 更柔和的背景色 */
            line-height: 1.7; /* 优化行高，提升阅读体验 */
            overflow-x: hidden;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: all 0.4s cubic-bezier(0.25, 0.8, 0.25, 1); /* 更丝滑的过渡曲线 */
        }
        .container {
            width: 88%; /* 放宽容器，增加大气感 */
            max-width: 1280px; /* 加大最大宽度 */
            margin: 0 auto;
        }
        button {
            cursor: pointer;
            border: none;
            transition: all 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
        }

        /* 导航栏 - 优化通透感+滚动动效 */
        .navbar {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            background-color: rgba(255, 255, 255, 0.95); /* 半透明白，更高级 */
            backdrop-filter: blur(8px); /* 毛玻璃效果，提升质感 */
            box-shadow: 0 2px 20px rgba(0, 0, 0, 0.05); /* 更浅的阴影，更自然 */
            z-index: 999;
            padding: 18px 0; /* 加大内边距，更大气 */
            transition: all 0.4s ease;
        }
        .navbar .container {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .logo {
            font-size: 28px; /* 加大logo字体 */
            font-weight: 700; /* 加粗 */
            color: #007bff;
            letter-spacing: 1px; /* 字母间距，提升质感 */
        }
        .nav-links {
            display: flex;
            list-style: none;
            gap: 40px; /* 加大导航间距 */
        }
        .nav-links li a {
            font-size: 17px;
            font-weight: 500;
            position: relative; /* 增加下划线动效 */
        }
        .nav-links li a::after {
            content: "";
            position: absolute;
            bottom: -4px;
            left: 0;
            width: 0;
            height: 2px;
            background-color: #007bff;
            transition: width 0.3s ease;
        }
        .nav-links li a:hover {
            color: #007bff;
        }
        .nav-links li a:hover::after {
            width: 100%; /* hover下划线展开 */
        }
        .mobile-menu-btn {
            display: none;
            font-size: 26px;
            color: #2c3e50;
        }

        /* 业务Banner - 提升视觉冲击力 */
        .business-banner {
            margin-top: 94px; /* 适配导航栏高度 */
            height: 420px; /* 加高banner，更大气 */
            background: linear-gradient(135deg, #0066cc 0%, #0099ff 50%, #00c6ff 100%); /* 更有层次的渐变 */
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center; /* 文字居中 */
            padding: 0 20px;
            position: relative;
            overflow: hidden;
        }
        /* 增加banner背景装饰 */
        .business-banner::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
            opacity: 0.6;
        }
        .banner-content {
            position: relative;
            z-index: 2;
            text-align: center; /* 文字居中 */
            max-width: 900px;
        }
        .business-banner h1 {
            font-size: 52px; /* 加大标题 */
            margin-bottom: 20px;
            font-weight: 700;
            letter-spacing: 2px; /* 增加字间距 */
            line-height: 1.2; /* 收紧行高 */
        }
        .business-banner p {
            font-size: 20px;
            max-width: 800px;
            margin: 0 auto;
            opacity: 0.95;
            line-height: 1.6;
        }

        /* 业务详情板块 - 卡片式布局，更立体 */
        .business-detail {
            padding: 100px 0; /* 加大上下内边距 */
            background-color: #fff;
            position: relative;
        }
        .business-detail .container {
            max-width: 1100px;
        }
        .section-title {
            text-align: center; /* 标题居中 */
            margin-bottom: 60px; /* 加大间距 */
        }
        .business-detail h2 {
            font-size: 38px;
            color: #2c3e50;
            margin-bottom: 15px;
            font-weight: 700;
            letter-spacing: 1px;
        }
        .business-detail h2::after {
            content: "";
            display: block;
            width: 80px;
            height: 4px;
            background-color: #007bff;
            margin: 20px auto 0; /* 居中下划线 */
            border-radius: 2px;
        }
        .section-desc {
            font-size: 18px;
            color: #666;
            max-width: 800px;
            margin: 0 auto;
            line-height: 1.8;
        }

        /* 服务卡片布局 */
        .service-cards {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); /* 自适应网格 */
            gap: 30px; /* 卡片间距 */
            margin-top: 50px;
        }
        .service-card {
            background-color: #f8f9fa;
            border-radius: 12px; /* 大圆角，更现代 */
            padding: 40px 30px; /* 加大内边距 */
            box-shadow: 0 5px 20px rgba(0, 0, 0, 0.03); /* 浅阴影 */
            transition: all 0.4s ease;
            border: 1px solid rgba(0, 123, 255, 0.05); /* 轻微边框 */
        }
        .service-card:hover {
            transform: translateY(-8px); /* 上移效果更明显 */
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.08); /* 加深阴影 */
            border-color: rgba(0, 123, 255, 0.1); /* 边框变色 */
        }
        .service-card h3 {
            font-size: 24px;
            color: #007bff;
            margin-bottom: 20px;
            font-weight: 600;
            display: flex;
            align-items: center; /* 图标和文字对齐 */
        }
        .service-card h3 i {
            font-size: 28px;
            margin-right: 12px;
            color: #007bff;
        }
        .service-card ul {
            list-style: none;
            margin-bottom: 20px;
        }
        .service-card ul li {
            color: #555;
            line-height: 1.8;
            margin-bottom: 12px;
            padding-left: 28px;
            position: relative;
            font-size: 16px;
        }
        .service-card ul li::before {
            content: "\f121";
            font-family: "bootstrap-icons";
            position: absolute;
            left: 0;
            color: #007bff;
            font-size: 18px;
        }

        /* 服务优势板块 */
        .service-advantages {
            margin-top: 80px;
            padding: 40px;
            background: linear-gradient(135deg, #f0f8ff 0%, #e6f7ff 100%);
            border-radius: 12px;
            text-align: center;
        }
        .service-advantages p {
            font-size: 18px;
            color: #333;
            margin-bottom: 0;
            font-weight: 500;
        }

        /* 按钮优化 - 更大气 */
        .btn-primary {
            padding: 14px 40px; /* 加大按钮 */
            background-color: #007bff;
            color: #fff;
            font-size: 17px;
            border-radius: 50px;
            font-weight: 600;
            display: inline-block;
            margin-top: 40px; /* 加大间距 */
            box-shadow: 0 8px 15px rgba(0, 123, 255, 0.15); /* 按钮阴影 */
        }
        .btn-primary:hover {
            background-color: #0069d9;
            transform: translateY(-3px); /* 上移更明显 */
            box-shadow: 0 12px 20px rgba(0, 123, 255, 0.2); /* 加深阴影 */
        }

        /* 页脚优化 - 更大气 */
        .footer {
            background-color: #2c3e50; /* 更深的背景色 */
            color: #fff;
            padding: 80px 0 30px; /* 加大上内边距 */
        }
        .footer .container {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 60px; /* 加大列间距 */
        }
        .footer-col {
            flex: 1;
            min-width: 220px; /* 最小宽度，防止挤压 */
        }
        .footer-col h4 {
            font-size: 20px; /* 加大标题 */
            margin-bottom: 25px;
            position: relative;
            font-weight: 600;
        }
        .footer-col h4::after {
            content: "";
            position: absolute;
            left: 0;
            bottom: -10px;
            width: 50px;
            height: 3px;
            background-color: #007bff;
            border-radius: 1.5px;
        }
        .footer-col ul {
            list-style: none;
        }
        .footer-col ul li {
            margin-bottom: 12px;
            font-size: 16px;
        }
        .footer-col ul li a:hover {
            color: #007bff;
            padding-left: 8px; /* 加大偏移 */
        }
        .footer-col p {
            font-size: 16px;
            color: #ddd;
            line-height: 1.8;
        }
        .copyright {
            text-align: center;
            margin-top: 60px; /* 加大间距 */
            padding-top: 30px; /* 加大上内边距 */
            border-top: 1px solid rgba(255, 255, 255, 0.1); /* 更浅的边框 */
            font-size: 15px;
            color: #bbb;
        }

        /* 响应式适配 - 优化移动端体验 */
        @media (max-width: 768px) {
            .mobile-menu-btn {
                display: block;
            }
            .nav-links {
                position: fixed;
                top: 94px;
                left: -100%;
                width: 100%;
                height: calc(100vh - 94px);
                background-color: #fff;
                flex-direction: column;
                align-items: center;
                justify-content: center;
                gap: 25px; /* 加大移动端导航间距 */
                transition: left 0.4s ease;
                box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
            }
            .nav-links.active {
                left: 0;
            }
            .business-banner {
                height: 320px; /* 移动端banner高度 */
            }
            .business-banner h1 {
                font-size: 36px;
            }
            .business-banner p {
                font-size: 18px;
            }
            .business-detail h2 {
                font-size: 28px;
            }
            .section-desc {
                font-size: 16px;
            }
            .service-card {
                padding: 30px 20px; /* 移动端卡片内边距 */
            }
            .service-card h3 {
                font-size: 22px;
            }
            .btn-primary {
                padding: 12px 35px;
                font-size: 16px;
            }
            .footer {
                padding: 60px 0 20px;
            }
            .footer-col {
                margin-bottom: 20px;
            }
        }