:root{
            --primary:#1677ff;
            --primary-dark:#0958d9;
            --secondary:#ff7d00;
            --gray:#666;
            --light-bg:#f5f7fa;
            --border:#e5e7eb;
        }
        *{margin:0;padding:0;box-sizing:border-box;}
        html{scroll-behavior:smooth;}
        body{font-family:"Microsoft YaHei",sans-serif;color:#333;line-height:1.8;}
        .text-primary{color:var(--primary)!important;}
        .text-secondary{color:var(--secondary)!important;}
        .btn-primary{background:var(--primary);color:#fff;padding:12px 28px;border-radius:6px;text-decoration:none;display:inline-block;border:none;cursor:pointer;}
        .btn-primary:hover{background:var(--primary-dark);}
        .btn-outline{border:1px solid var(--primary);color:var(--primary);padding:12px 28px;border-radius:6px;text-decoration:none;display:inline-block;}
        .btn-outline:hover{background:var(--primary);color:#fff;}

        /* 顶部通栏 */
        .top-bar{background:#0f172a;color:#fff;font-size:14px;padding:8px 0;}
        .container{width:92%;max-width:1200px;margin:0 auto;}
        .d-flex{display:flex;}
        .justify-between{justify-content:space-between;}
        .align-items-center{align-items:center;}

        /* 导航 */
        .navbar{background:#fff;box-shadow:0 2px 10px rgba(0,0,0,0.06);padding:14px 0;position:sticky;top:0;z-index:99;}
        .logo{font-size:22px;font-weight:bold;color:var(--primary);text-decoration:none;}
        .nav-list{display:flex;gap:24px;list-style:none;align-items:center;}
        .nav-list a{color:#333;text-decoration:none;font-size:15px;}
        .nav-list a:hover{color:var(--primary);}
        .menu-btn{display:none;border:none;background:none;font-size:22px;}

        /* 首屏Banner */
        .hero{
            background:linear-gradient(135deg,#0f172a 0%,#1677ff 100%);
            color:#fff;padding:110px 0 90px;
        }
        .hero h1{font-size:42px;font-weight:bold;margin-bottom:20px;line-height:1.3;}
        .hero p{font-size:18px;margin-bottom:30px;opacity:.95;max-width:700px;}
        .hero-btn-group{display:flex;gap:16px;flex-wrap:wrap;}

        /* 通用区块 */
        section{padding:70px 0;}
        .section-title{text-align:center;margin-bottom:50px;}
        .section-title h2{font-size:32px;font-weight:bold;margin-bottom:12px;}
        .section-title p{color:var(--gray);max-width:720px;margin:0 auto;}

        /* 数据统计 */
        .stat-row{display:flex;flex-wrap:wrap;}
        .stat-item{flex:1;text-align:center;padding:20px;min-width:120px;}
        .stat-item h3{font-size:42px;font-weight:bold;color:var(--primary);margin-bottom:6px;}
        .stat-item p{color:var(--gray);}

        /* 服务卡片 */
        .row{display:flex;flex-wrap:wrap;margin:0 -12px;}
        .col-lg-4,.col-md-6,.col-lg-3{padding:0 12px;margin-bottom:24px;}
        .col-lg-4{width:33.333%;}
        .col-lg-3{width:25%;}
        .col-md-6{width:50%;}
        .service-card{background:#fff;border-radius:10px;padding:28px 24px;box-shadow:0 3px 12px rgba(0,0,0,0.06);height:100%;transition:.3s;border-top:3px solid var(--primary);}
        .service-card:hover{transform:translateY(-5px);box-shadow:0 8px 20px rgba(22,119,255,0.15);}
        .service-card h3{color:var(--primary);font-size:20px;margin-bottom:12px;}
        .service-card ul{padding-left:20px;color:#555;margin-top:10px;font-size:14px;}

        /* 优势卡片 */
        .adv-card{background:#fff;border-radius:10px;padding:24px;text-align:center;box-shadow:0 2px 10px rgba(0,0,0,0.05);height:100%;}
        .adv-icon{width:60px;height:60px;border-radius:50%;background:#e6f0ff;color:var(--primary);line-height:60px;font-size:24px;margin:0 auto 15px;}

        /* 流程 */
        .flow-item{text-align:center;position:relative;}
        .flow-num{width:44px;height:44px;border-radius:50%;background:var(--primary);color:#fff;line-height:44px;margin:0 auto 12px;font-weight:bold;}

        /* 案例卡片 */
        .case-card{background:#fff;border-radius:10px;padding:24px;box-shadow:0 2px 10px rgba(0,0,0,0.06);height:100%;}
        .case-data{display:flex;justify-content:space-around;margin:15px 0;text-align:center;}
        .case-data div strong{display:block;font-size:22px;color:var(--primary);}

        /* 关于我们 */
        .about-box{background:#fff;border-radius:10px;padding:30px;box-shadow:0 3px 14px rgba(0,0,0,0.06);}

        /* FAQ */
        .faq-item{background:#fff;border-radius:8px;padding:20px;margin-bottom:14px;box-shadow:0 2px 8px rgba(0,0,0,0.05);}
        .faq-item h4{font-size:17px;margin-bottom:8px;color:#222;}
        .faq-item p{color:#555;}

        /* 底部 */
        footer{background:#0f172a;color:#b8c0d0;padding:40px 0 20px;}
        footer h4{color:#fff;margin-bottom:15px;font-size:18px;}
        .footer-link{list-style:none;}
        .footer-link li{margin-bottom:8px;}
        .footer-link a{color:#b8c0d0;text-decoration:none;}
        .footer-link a:hover{color:#fff;}

        /* 友情链接 */
        .friend-link{padding:25px 0;background:#0a0f1a;color:#99a3b8;border-top:1px solid #1e293b;}
        .flink-list{display:flex;flex-wrap:wrap;gap:14px;row-gap:10px;margin-top:10px;}
        .flink-list a{color:#99a3b8;text-decoration:none;font-size:14px;}
        .flink-list a:hover{color:#fff;}

        /* 悬浮电话 */
        .float-tel{position:fixed;right:20px;bottom:30px;z-index:99;}
        .float-tel a{display:block;width:56px;height:56px;border-radius:50%;background:var(--primary);color:#fff;text-align:center;line-height:56px;font-size:22px;text-decoration:none;box-shadow:0 4px 12px rgba(22,119,255,0.4);}

        .bg-light{background:var(--light-bg);}
        .text-center{text-align:center;}
        .mt-4{margin-top:16px;}
        .mt-5{margin-top:30px;}
        .w-100{width:100%;}
        .mx-auto{margin-left:auto;margin-right:auto;}
        .col-lg-10{width:83.333%;}

        @media(max-width:768px){
            .hero h1{font-size:28px;}
            .hero{padding:70px 0 60px;}
            section{padding:45px 0;}
            .col-lg-4,.col-lg-3,.col-md-6{width:100%;}
            .nav-list{display:none;}
            .menu-btn{display:block;}
            .stat-item h3{font-size:32px;}
        }