* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: "PingFang SC", "Microsoft Yahei", sans-serif;
        }
        :root {
            --primary: #165DFF;
            --dark: #111827;
            --gray: #6B7280;
            --light: #F9FAFB;
            --white: #FFFFFF;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            color: var(--dark);
            background-color: var(--light);
            line-height: 1.6;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        /* 导航栏 */
        header {
            background: var(--white);
            box-shadow: 0 2px 10px rgba(0,0,0,0.08);
            position: sticky;
            top:0;
            z-index:999;
        }
        .nav-wrap {
            display: flex;
            justify-content: space-between;
            align-items: center;
            height:70px;
        }
        .logo {
            font-size:22px;
            font-weight:bold;
            color:var(--primary);
            text-decoration:none;
        }
        .nav-menu {
            display:flex;
            gap:32px;
        }
        .nav-menu a {
            color:var(--dark);
            text-decoration:none;
            transition: 0.3s;
        }
        .nav-menu a:hover {
            color:var(--primary);
        }
        .tel-btn {
            background:var(--primary);
            color:#fff !important;
            padding:8px 16px;
            border-radius:6px;
        }
        .mobile-menu-btn {
            display:none;
            font-size:24px;
            cursor:pointer;
        }
        /* 首屏Banner */
        .banner {
            background: linear-gradient(135deg,#0F3899,#165DFF);
            color:#fff;
            padding:100px 0;
        }
        .banner-content {
            max-width:700px;
        }
        .banner h1 {
            font-size:42px;
            margin-bottom:20px;
        }
        .banner p {
            font-size:18px;
            opacity:0.9;
            margin-bottom:30px;
        }
        .banner-buttons a {
            display:inline-block;
            padding:14px 28px;
            border-radius:8px;
            text-decoration:none;
            font-weight:600;
            margin-right:16px;
        }
        .btn-main {
            background:#fff;
            color:var(--primary);
        }
        .btn-outline {
            border:1px solid #fff;
            color:#fff;
        }
        /* 通用区块 */
        .section {
            padding:80px 0;
        }
        .section-title {
            text-align:center;
            margin-bottom:50px;
        }
        .section-title h2 {
            font-size:32px;
            color:var(--dark);
            margin-bottom:12px;
        }
        .section-title p {
            color:var(--gray);
            max-width:700px;
            margin:0 auto;
        }
        /* 服务板块 */
        .service-grid {
            display:grid;
            grid-template-columns: repeat(3,1fr);
            gap:24px;
        }
        .service-card {
            background:#fff;
            padding:32px;
            border-radius:12px;
            box-shadow:0 4px 15px rgba(0,0,0,0.05);
            transition:0.3s;
        }
        .service-card:hover {
            transform: translateY(-6px);
            box-shadow:0 8px 24px rgba(0,0,0,0.1);
        }
        .service-card h3 {
            font-size:20px;
            margin:16px 0 12px;
        }
        /* 优势板块 */
        .advantage-wrap {
            display:grid;
            grid-template-columns: repeat(4,1fr);
            gap:20px;
        }
        .advantage-item {
            text-align:center;
            padding:24px;
        }
        .advantage-item h3 {
            margin:10px 0 8px;
        }
        /* 流程板块 */
        .process-wrap {
            display:grid;
            grid-template-columns: repeat(4,1fr);
            gap:20px;
        }
        .process-item {
            background:#fff;
            padding:24px;
            border-radius:10px;
            position:relative;
        }
        .process-item .num {
            width:36px;
            height:36px;
            background:var(--primary);
            color:#fff;
            border-radius:50%;
            text-align:center;
            line-height:36px;
            font-weight:bold;
            margin-bottom:12px;
        }
        /* 案例板块 */
        .case-grid {
            display:grid;
            grid-template-columns: repeat(3,1fr);
            gap:24px;
        }
        .case-card {
            background:#fff;
            border-radius:12px;
            overflow:hidden;
            box-shadow:0 4px 15px rgba(0,0,0,0.05);
        }
        .case-body {
            padding:24px;
        }
        /* FAQ 默认全部展开，无隐藏 */
        .faq-wrap {
            max-width:800px;
            margin:0 auto;
        }
        .faq-item {
            background:#fff;
            margin-bottom:12px;
            border-radius:8px;
            overflow:hidden;
        }
        .faq-question {
            padding:18px 24px;
            font-weight:600;
        }
        .faq-answer {
            padding:0 24px 18px;
            max-height:unset;
            overflow:visible;
            color:var(--gray);
            line-height:1.7;
        }
        /* 底部 */
        footer {
            background:#0F172A;
            color:#94A3B8;
            padding:40px 0;
            margin-top:40px;
        }
        .footer-wrap {
            display:grid;
            grid-template-columns: repeat(3,1fr);
            gap:30px;
        }
        .copyright {
            text-align:center;
            padding-top:30px;
            margin-top:30px;
            border-top:1px solid #1E293B;
        }
        /* 移动端适配 */
        @media (max-width:992px) {
            .nav-menu {
                display:none;
                position:absolute;
                top:70px;
                left:0;
                width:100%;
                background:#fff;
                flex-direction:column;
                padding:20px;
                gap:16px;
            }
            .nav-menu.show {
                display:flex;
            }
            .mobile-menu-btn {
                display:block;
            }
            .banner h1 {
                font-size:32px;
            }
            .service-grid,.case-grid {
                grid-template-columns: repeat(2,1fr);
            }
            .advantage-wrap,.process-wrap {
                grid-template-columns: repeat(2,1fr);
            }
            .footer-wrap {
                grid-template-columns: 1fr;
            }
        }
        @media (max-width:576px) {
            .service-grid,.case-grid {
                grid-template-columns:1fr;
            }
            .advantage-wrap,.process-wrap {
                grid-template-columns:1fr;
            }
            .banner {
                padding:70px 0;
            }
            .banner h1 {
                font-size:26px;
            }
            .section {
                padding:50px 0;
            }
        }