<style>
    *{margin:0;padding:0;box-sizing:border-box;font-family:system-ui,'Segoe UI',Roboto,'Helvetica Neue',sans-serif;}
    body{background:#f5f9ff;color:#1a2b4c;line-height:1.5;}
    .container{max-width:1280px;margin:0 auto;padding:0 24px;}
    /* 蓝色主题 */
    :root{--primary:#0a66c2;--primary-dark:#004182;--secondary:#e8f0fe;--accent:#1e88e5;--light-bg:#f0f7ff;--white:#fff;--text-dark:#0b2545;--border-light:#d0e0f0;}
    a{text-decoration:none;color:inherit;}
    /* 头部导航 */
    header{background:var(--white);box-shadow:0 4px 12px rgba(0,65,130,0.08);position:sticky;top:0;z-index:100;}
    .header-inner{display:flex;align-items:center;justify-content:space-between;padding:12px 0;flex-wrap:wrap;}
    .logo a{font-size:28px;font-weight:800;letter-spacing:-0.5px;background:linear-gradient(135deg,#0a66c2,#3b8fd9);-webkit-background-clip:text;background-clip:text;color:transparent;display:flex;align-items:center;gap:6px;}
    .logo i{color:var(--primary);font-size:32px;background:transparent;-webkit-background-clip:unset;background-clip:unset;color:#0a66c2;}
    .nav-links{display:flex;gap:32px;font-weight:600;}
    .nav-links a{padding:8px 0;border-bottom:3px solid transparent;transition:0.2s;color:var(--text-dark);}
    .nav-links a:hover,.nav-links a.active{border-bottom-color:var(--primary);color:var(--primary);}
    .btn{display:inline-block;background:var(--primary);color:white;font-weight:600;padding:12px 28px;border-radius:60px;box-shadow:0 8px 18px rgba(10,102,194,0.25);transition:0.2s;border:none;cursor:pointer;}
    .btn-outline{background:transparent;border:2px solid var(--primary);color:var(--primary);box-shadow:none;}
    .btn-outline:hover{background:var(--primary);color:white;}
    .btn-large{padding:16px 42px;font-size:1.2rem;}
    .btn:hover{background:var(--primary-dark);transform:translateY(-3px);box-shadow:0 14px 24px rgba(10,102,194,0.3);}
    /* 版块通用 */
    section{padding:70px 0;}
    .section-title{font-size:2.2rem;font-weight:700;text-align:center;margin-bottom:16px;color:#0b2545;}
    .section-sub{text-align:center;color:#3a5a7a;max-width:700px;margin:0 auto 48px;font-size:1.2rem;}
    .grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:30px;}
    .grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;}
    .card{background:var(--white);border-radius:28px;padding:28px 20px;box-shadow:0 12px 28px rgba(0,51,102,0.06);transition:0.2s;border:1px solid #eaf1fb;}
    .card:hover{transform:translateY(-6px);box-shadow:0 24px 40px rgba(10,102,194,0.12);}
    .icon-lg{font-size:40px;color:var(--primary);margin-bottom:20px;}
    /* 首页大屏 */
    .hero{background:linear-gradient(145deg, #e3f0ff 0%, #c2e0ff 100%);border-radius:0 0 60px 60px;margin-top:-20px;padding:80px 0;}
    .hero-content{text-align:center;}
    .hero h1{font-size:3.5rem;font-weight:800;color:#003366;line-height:1.2;margin-bottom:20px;}
    .hero p{font-size:1.4rem;color:#1e3a5f;max-width:800px;margin:0 auto 32px;}
    .hero-buttons{display:flex;gap:20px;justify-content:center;flex-wrap:wrap;}
    .stats{display:flex;justify-content:center;gap:50px;margin-top:48px;}
    .stat-item{text-align:center;}
    .stat-num{font-size:2.5rem;font-weight:800;color:var(--primary);}
    .rating i{color:#f5b342;}
    /* 流程 */
    .steps{display:flex;justify-content:space-between;margin-top:30px;flex-wrap:wrap;}
    .step{flex:1;text-align:center;padding:20px;}
    .step-num{background:var(--primary);width:50px;height:50px;border-radius:50%;color:white;font-weight:bold;font-size:24px;display:flex;align-items:center;justify-content:center;margin:0 auto 20px;}
    /* FAQ折叠 */
    .faq-list{max-width:900px;margin:0 auto;}
    details{background:var(--white);border-radius:20px;padding:18px 24px;margin-bottom:12px;box-shadow:0 4px 10px rgba(0,0,0,0.02);border:1px solid var(--border-light);}
    summary{font-weight:700;font-size:1.1rem;cursor:pointer;list-style:none;display:flex;justify-content:space-between;}
    summary::-webkit-details-marker{display:none;}
    summary::after{content:'+';font-size:24px;color:var(--primary);}
    details[open] summary::after{content:'−';}
    .faq-answer{padding-top:16px;color:#2c3e5c;}
    /* footer */
    footer{background:#0a2540;color:#ccdcec;padding:50px 0 30px;margin-top:40px;}
    .footer-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:30px;}
    .footer-col h4{color:white;margin-bottom:20px;font-size:1.2rem;}
    .footer-col ul li{list-style:none;margin-bottom:10px;}
    .footer-col a{color:#b0c8e0;transition:0.2s;}
    .footer-col a:hover{color:white;}
    .copyright{text-align:center;margin-top:40px;padding-top:20px;border-top:1px solid #1f3a5a;color:#8aa0bc;}
    /* 下载页面表格卡片 */
    .download-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:24px;}
    .download-card{text-align:center;padding:28px 12px;}
    .badge{background:var(--secondary);color:var(--primary);padding:4px 12px;border-radius:40px;font-size:0.9rem;}
    /* 响应式 */
    @media (max-width:768px){
      .grid-3,.grid-4{grid-template-columns:1fr;}
      .header-inner{flex-direction:column;gap:12px;}
      .nav-links{gap:20px;}
      .hero h1{font-size:2.5rem;}
      .stats{flex-direction:column;gap:20px;}
      .steps{flex-direction:column;}
    }
    /* 小贴片 */
    .inline-link{font-weight:600;color:var(--primary);}
  </style>