:root{
      --bg:#f5f7f8;
      --panel:#ffffff;
      --panel-2:#eef3f5;
      --line:#d9e2e6;
      --text:#21303a;
      --muted:#61707a;
      --accent:#62838f;
      --accent-2:#8ba6ae;
      --shadow:0 18px 40px rgba(34,54,63,.08);
      --radius:22px;
      --container:1120px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
      color:var(--text);
      background:
        radial-gradient(circle at top left, rgba(139,166,174,.16), transparent 28%),
        radial-gradient(circle at top right, rgba(98,131,143,.10), transparent 24%),
        linear-gradient(180deg, #fbfcfc 0%, var(--bg) 100%);
    }
    a{color:inherit;text-decoration:none}
    img{max-width:100%;display:block}
    .container{max-width:var(--container);margin:0 auto;padding:0 18px}
    header{
      position:sticky;top:0;z-index:30;
      backdrop-filter:blur(12px);
      background:rgba(245,247,248,.78);
      border-bottom:1px solid rgba(217,226,230,.8);
    }
    .nav{
      min-height:76px;
      display:flex;align-items:center;justify-content:space-between;gap:16px;
    }
    .logo{
      display:inline-flex;align-items:center;gap:12px;font-weight:800;letter-spacing:.08em;color:var(--text);
    }
    .logo-mark{
      width:42px;height:42px;border-radius:14px;
      display:grid;place-items:center;
      background:linear-gradient(145deg,#ffffff,#e7eef1);
      border:1px solid var(--line);
      box-shadow:0 10px 20px rgba(34,54,63,.08);
      font-size:22px;
    }
    nav ul{
      list-style:none;margin:0;padding:0;
      display:flex;flex-wrap:wrap;gap:14px 18px;align-items:center;justify-content:flex-end;
    }
    nav a{
      color:var(--muted);
      font-size:14px;
      padding:8px 0;
      transition:.25s ease;
    }
    nav a:hover{color:var(--text)}
    .nav-cta{
      padding:10px 16px;border-radius:999px;
      background:linear-gradient(135deg,var(--accent),#4f6d77);
      color:#fff;font-size:14px;font-weight:700;
      box-shadow:0 10px 24px rgba(98,131,143,.24);
      white-space:nowrap;
    }
    main{display:block}
    .hero{
      padding:34px 0 18px;
    }
    .hero-grid{
      display:grid;
      grid-template-columns:1.45fr .95fr;
      gap:22px;
      align-items:stretch;
    }
    .hero-card,.side-card,.section-card,.contact-card,.faq-card,footer .footer-card{
      background:rgba(255,255,255,.84);
      border:1px solid rgba(217,226,230,.9);
      border-radius:var(--radius);
      box-shadow:var(--shadow);
    }
    .hero-card{
      padding:34px;
      position:relative;
      overflow:hidden;
    }
    .hero-card::after{
      content:"";
      position:absolute;inset:auto -80px -80px auto;
      width:220px;height:220px;border-radius:50%;
      background:radial-gradient(circle, rgba(139,166,174,.24), transparent 68%);
      pointer-events:none;
    }
    h1{
      margin:0 0 16px;
      font-size:clamp(30px,4vw,48px);
      line-height:1.15;
      letter-spacing:.02em;
    }
    .lead{
      margin:0 0 20px;
      color:var(--muted);
      line-height:1.8;
      font-size:16px;
      max-width:58ch;
    }
    .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:18px}
    .btn{
      display:inline-flex;align-items:center;justify-content:center;gap:8px;
      min-height:46px;padding:0 18px;border-radius:14px;
      border:1px solid transparent;font-weight:700;transition:.25s ease;
    }
    .btn-primary{background:linear-gradient(135deg,var(--accent),#5e7e89);color:#fff;box-shadow:0 12px 24px rgba(98,131,143,.22)}
    .btn-secondary{background:#fff;color:var(--text);border-color:var(--line)}
    .btn:hover{transform:translateY(-1px)}
    .hero-meta{
      display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin-top:26px
    }
    .mini{
      background:linear-gradient(180deg,#ffffff,#f5f8f9);
      border:1px solid var(--line);
      border-radius:18px;padding:14px 16px;
    }
    .mini b{display:block;font-size:14px;margin-bottom:6px}
    .mini span{color:var(--muted);font-size:13px;line-height:1.6}
    .side-card{padding:22px}
    .side-card h2,.section-card h2,.contact-card h2,.faq-card h2{margin:0 0 12px;font-size:22px}
    .side-list{display:grid;gap:12px;margin-top:14px}
    .side-item{
      padding:14px 14px 14px 16px;border-radius:16px;
      background:var(--panel-2);border:1px solid var(--line);
    }
    .side-item b{display:block;margin-bottom:4px}
    .side-item p{margin:0;color:var(--muted);font-size:14px;line-height:1.7}
    .section{
      padding:16px 0;
    }
    .section-card{
      padding:28px;
    }
    .section-head{
      display:flex;align-items:end;justify-content:space-between;gap:12px;flex-wrap:wrap;margin-bottom:18px
    }
    .section-head p{margin:0;color:var(--muted);line-height:1.7}
    .anchor-row{
      display:flex;flex-wrap:wrap;gap:10px;
      padding:14px 0 0;
    }
    .anchor-row a{
      padding:10px 14px;border-radius:999px;
      background:#f3f7f8;border:1px solid var(--line);
      color:var(--text);font-size:14px;
      transition:.25s ease;
    }
    .anchor-row a:hover{background:#eaf1f3}
    .grid-3{
      display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px
    }
    .info-card{
      padding:18px;border-radius:18px;background:#fff;border:1px solid var(--line)
    }
    .info-card h3{margin:0 0 10px;font-size:18px}
    .info-card p,.info-card li{margin:0;color:var(--muted);line-height:1.75;font-size:14px}
    .info-card ul{margin:0;padding-left:18px;display:grid;gap:8px}
    .steps{
      display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px
    }
    .step{
      padding:18px;border-radius:18px;background:linear-gradient(180deg,#fff,#f6f9fa);border:1px solid var(--line)
    }
    .step .num{
      width:32px;height:32px;border-radius:10px;
      display:grid;place-items:center;
      background:rgba(98,131,143,.12);color:#3d5b66;font-weight:800;margin-bottom:12px
    }
    .step h3{margin:0 0 8px;font-size:16px}
    .step p{margin:0;color:var(--muted);font-size:14px;line-height:1.75}
    .contact-grid{
      display:grid;grid-template-columns:1.05fr .95fr;gap:18px
    }
    .contact-card{padding:26px}
    .contact-list{display:grid;gap:12px;margin:18px 0 0;padding:0;list-style:none}
    .contact-list li{
      padding:14px 16px;border-radius:16px;background:#f6f9fa;border:1px solid var(--line);line-height:1.7
    }
    .qrcode{
      padding:18px;border-radius:18px;background:linear-gradient(180deg,#fff,#f7fbfc);border:1px solid var(--line)
    }
    .qrcode p{margin:10px 0 0;color:var(--muted);font-size:14px;line-height:1.7}
    .faq-card{padding:26px}
    .faq{
      display:grid;gap:12px;margin-top:16px
    }
    details{
      background:#f8fbfc;border:1px solid var(--line);border-radius:16px;padding:14px 16px
    }
    summary{cursor:pointer;font-weight:700;list-style:none}
    summary::-webkit-details-marker{display:none}
    details p{margin:10px 0 0;color:var(--muted);line-height:1.8}
    .summary-box{
      margin-top:16px;
      padding:18px 18px 0;
      border-top:1px solid var(--line);
      color:var(--muted);
      line-height:1.8;
    }
    .footer-links{
      display:flex;flex-wrap:wrap;gap:12px;margin-top:12px
    }
    .footer-links a{
      color:var(--text);font-size:14px;
      padding:8px 12px;border-radius:999px;background:#f5f8f9;border:1px solid var(--line)
    }
    footer{
      padding:18px 0 22px;
    }
    footer .footer-card{
      padding:22px;
      display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;align-items:center
    }
    footer p{margin:0;color:var(--muted);line-height:1.7}
    .fade-up{animation:fadeUp .7s ease both}
    @keyframes fadeUp{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:none}}
    @media (max-width: 980px){
      .hero-grid,.contact-grid,.grid-3,.steps{grid-template-columns:1fr 1fr}
      .hero-card{padding:28px}
    }
    @media (max-width: 720px){
      .nav{min-height:70px;align-items:center}
      nav ul{display:none}
      .hero{padding-top:24px}
      .hero-grid,.contact-grid,.grid-3,.steps{grid-template-columns:1fr}
      .hero-card,.section-card,.contact-card,.faq-card,.side-card{padding:22px}
      h1{font-size:30px}
      .hero-meta{grid-template-columns:1fr}
      .section-head{align-items:flex-start}
      footer .footer-card{align-items:flex-start}
    }