:root{
      --bg:#f6f8fc;
      --panel:#ffffff;
      --panel-2:#f9fbff;
      --text:#172033;
      --muted:#5d6980;
      --line:#dbe3f0;
      --brand:#4c6fff;
      --brand-2:#7a5cff;
      --accent:#18c5d6;
      --warm:#ffb84d;
      --shadow:0 18px 42px rgba(34,57,110,.12);
      --shadow-soft:0 10px 24px rgba(34,57,110,.08);
      --radius:20px;
      --radius-sm:14px;
      --max:1180px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      font-family:system-ui,-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(76,111,255,.14), transparent 28%),
        radial-gradient(circle at top right, rgba(24,197,214,.12), transparent 24%),
        linear-gradient(180deg, #ffffff 0%, #f5f8ff 48%, #f3f6fb 100%);
    }
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%}
    .container{width:min(var(--max), calc(100% - 32px)); margin:0 auto}
    .topbar{
      position:sticky;top:0;z-index:50;
      backdrop-filter:saturate(180%) blur(14px);
      background:rgba(255,255,255,.82);
      border-bottom:1px solid rgba(219,227,240,.7);
    }
    .nav{
      display:flex;align-items:center;justify-content:space-between;gap:18px;
      padding:14px 0;
    }
    .brand{display:flex;align-items:center;gap:12px;min-width:0}
    .brand img{width:44px;height:44px;object-fit:contain;background:#fff;border:1px solid var(--line);border-radius:12px;padding:6px;box-shadow:var(--shadow-soft)}
    .brand-text{min-width:0}
    .brand-text strong{display:block;font-size:1rem;line-height:1.15}
    .brand-text span{display:block;font-size:.84rem;color:var(--muted);margin-top:2px}
    .nav-toggle{display:none;border:1px solid var(--line);background:#fff;border-radius:12px;padding:10px 12px;color:var(--text)}
    .menu{display:flex;align-items:center;gap:16px;flex-wrap:wrap;justify-content:flex-end}
    .menu a{font-size:.92rem;color:var(--muted);padding:8px 10px;border-radius:999px;transition:.2s}
    .menu a:hover{color:var(--text);background:#eef3ff}
    .home-link{color:#fff!important;background:linear-gradient(135deg,var(--brand),var(--brand-2));box-shadow:0 10px 18px rgba(76,111,255,.22)}
    .hero{padding:34px 0 18px}
    .hero-grid{display:grid;grid-template-columns:1.12fr .88fr;gap:22px;align-items:stretch}
    .hero-copy,.hero-aside,.card,.panel,.faq-item,.review,.article,.metric,.step,.compare,.form-wrap,.price-box{
      background:rgba(255,255,255,.86);
      border:1px solid rgba(219,227,240,.88);
      border-radius:var(--radius);
      box-shadow:var(--shadow-soft);
    }
    .hero-copy{padding:30px}
    .kicker{display:inline-flex;align-items:center;gap:8px;padding:8px 12px;border-radius:999px;background:#eef3ff;color:#2d4fd0;font-size:.88rem;font-weight:600}
    h1{font-size:clamp(2rem,4vw,3.6rem);line-height:1.08;margin:16px 0 14px;letter-spacing:-.02em}
    .lead{font-size:1.05rem;line-height:1.8;color:var(--muted);max-width:58ch;margin:0 0 22px}
    .hero-actions{display:flex;gap:12px;flex-wrap:wrap}
    .btn{
      display:inline-flex;align-items:center;justify-content:center;gap:8px;
      padding:13px 18px;border-radius:14px;border:1px solid transparent;
      font-weight:700;font-size:.96rem;transition:.22s ease;cursor:pointer
    }
    .btn-primary{background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#fff;box-shadow:0 14px 24px rgba(76,111,255,.22)}
    .btn-secondary{background:#fff;border-color:var(--line);color:var(--text)}
    .btn:hover{transform:translateY(-2px)}
    .hero-badges{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}
    .chip{padding:9px 12px;border-radius:999px;background:#f1f5ff;border:1px solid #dce5fb;color:#3550a6;font-size:.88rem}
    .hero-aside{padding:22px}
    .mini-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
    .metric{padding:16px 14px}
    .metric strong{display:block;font-size:1.2rem}
    .metric span{display:block;color:var(--muted);font-size:.86rem;margin-top:6px;line-height:1.45}
    .section{padding:16px 0 8px}
    .section-head{display:flex;align-items:end;justify-content:space-between;gap:12px;margin-bottom:16px}
    .section-head h2{margin:0;font-size:1.55rem}
    .section-head p{margin:0;color:var(--muted);line-height:1.7;max-width:62ch}
    .grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
    .grid-4{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}
    .card,.panel,.review,.article,.step,.compare,.form-wrap,.price-box{padding:20px}
    .card h3,.panel h3,.review h3,.article h3,.step h3,.price-box h3{margin:0 0 10px;font-size:1.06rem}
    .card p,.panel p,.review p,.article p,.step p,.price-box p{margin:0;color:var(--muted);line-height:1.75}
    .icon{
      width:42px;height:42px;border-radius:14px;display:grid;place-items:center;
      background:linear-gradient(135deg,rgba(76,111,255,.14),rgba(24,197,214,.12));
      color:#3251d4;font-weight:800;margin-bottom:14px
    }
    .tag-cloud{display:flex;flex-wrap:wrap;gap:10px}
    .tag-cloud span{padding:10px 12px;border-radius:999px;background:#fff;border:1px solid var(--line);color:#34415d;font-size:.89rem}
    .timeline{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px}
    .step{position:relative}
    .step .num{display:inline-flex;align-items:center;justify-content:center;width:32px;height:32px;border-radius:50%;background:linear-gradient(135deg,var(--brand),var(--accent));color:#fff;font-weight:800;margin-bottom:12px}
    .compare{overflow:auto}
    table{width:100%;border-collapse:collapse;min-width:760px}
    th,td{padding:14px 12px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
    th{background:#f2f6ff;color:#27314a;font-size:.95rem}
    td{color:#425066;line-height:1.65}
    .highlight{color:#1136c9;font-weight:800}
    .split{display:grid;grid-template-columns:1fr 1fr;gap:16px;align-items:start}
    .list{display:grid;gap:12px;margin:0;padding:0;list-style:none}
    .list li{display:flex;gap:10px;color:var(--muted);line-height:1.7}
    .dot{width:10px;height:10px;border-radius:50%;margin-top:8px;background:linear-gradient(135deg,var(--brand),var(--accent));flex:0 0 auto}
    .faq{display:grid;gap:12px}
    .faq-item summary{
      list-style:none;cursor:pointer;padding:18px 20px;font-weight:700;display:flex;align-items:center;justify-content:space-between;gap:10px
    }
    .faq-item summary::-webkit-details-marker{display:none}
    .faq-item summary::after{content:"+";font-size:1.2rem;color:var(--brand);transition:.2s}
    .faq-item[open] summary::after{content:"–"}
    .faq-item .answer{padding:0 20px 18px;color:var(--muted);line-height:1.8}
    .reviews,.articles{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
    .review .role{display:inline-block;margin-bottom:10px;padding:7px 10px;border-radius:999px;background:#eef3ff;color:#3550a6;font-size:.84rem}
    .stars{letter-spacing:2px;color:#ffb400;font-size:1rem;margin-bottom:10px}
    .articles .article .meta{font-size:.84rem;color:#73809a;margin-top:12px}
    .form-wrap form{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
    .field{display:flex;flex-direction:column;gap:8px}
    .field.full{grid-column:1/-1}
    label{font-size:.92rem;font-weight:700}
    input,select,textarea{
      width:100%;border:1px solid var(--line);background:#fff;border-radius:14px;
      padding:13px 14px;font:inherit;color:var(--text);outline:none;transition:.18s
    }
    textarea{min-height:120px;resize:vertical}
    input:focus,select:focus,textarea:focus{border-color:#8aa0ff;box-shadow:0 0 0 4px rgba(76,111,255,.08)}
    .form-note{color:var(--muted);font-size:.9rem;line-height:1.7;margin-top:12px}
    .footer{
      margin-top:22px;padding:24px 0 26px;border-top:1px solid rgba(219,227,240,.9);
      background:rgba(255,255,255,.75);color:var(--text)
    }
    .footer-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:18px;align-items:start}
    .footer a{color:#2442d0}
    .footer small,.footer p{color:var(--muted)}
    .footer-links{display:flex;flex-wrap:wrap;gap:10px}
    .footer-links a{padding:8px 10px;background:#f4f7ff;border:1px solid var(--line);border-radius:999px}
    .float-box{
      position:fixed;right:16px;bottom:16px;z-index:60;display:flex;flex-direction:column;gap:10px
    }
    .float-btn{
      width:52px;height:52px;border-radius:16px;display:grid;place-items:center;
      background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#fff;box-shadow:var(--shadow);border:none;cursor:pointer
    }
    .back-top{opacity:0;pointer-events:none;transform:translateY(8px);transition:.22s}
    .back-top.show{opacity:1;pointer-events:auto;transform:translateY(0)}
    .floating-card{
      width:min(340px, calc(100vw - 32px)); display:none; padding:16px;
      background:#fff;border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow)
    }
    .floating-card.show{display:block}
    .qr{display:flex;gap:14px;align-items:center}
    .qr img{width:110px;height:110px;object-fit:cover;border-radius:14px;border:1px solid var(--line)}
    .muted{color:var(--muted)}
    .banner-row{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}
    .banner-row img{width:100%;height:100%;object-fit:cover;border-radius:18px;border:1px solid var(--line);box-shadow:var(--shadow-soft);aspect-ratio:4/3}
    .two-col{display:grid;grid-template-columns:1fr 1fr;gap:16px}
    .price-list{display:grid;gap:12px}
    .price-item{display:flex;justify-content:space-between;gap:12px;padding:14px;border-radius:14px;background:#fff;border:1px solid var(--line)}
    .price-item strong{display:block}
    .price-item span{color:var(--muted);font-size:.9rem}
    .service-network{display:flex;flex-wrap:wrap;gap:10px}
    .service-network span{padding:10px 12px;border-radius:14px;background:#fff;border:1px solid var(--line)}
    .toc{display:flex;flex-wrap:wrap;gap:10px}
    .toc a{padding:8px 10px;border-radius:999px;background:#fff;border:1px solid var(--line);font-size:.88rem;color:#425066}
    .touch{display:none}
    @media (max-width: 1024px){
      .hero-grid,.grid-4,.timeline,.reviews,.articles,.footer-grid,.two-col,.split,.grid-3,.banner-row{grid-template-columns:1fr 1fr}
    }
    @media (max-width: 760px){
      .nav-toggle{display:inline-flex}
      .menu{
        display:none;position:absolute;left:16px;right:16px;top:72px;
        background:#fff;border:1px solid var(--line);border-radius:18px;padding:12px;
        box-shadow:var(--shadow);flex-direction:column;align-items:stretch
      }
      .menu.show{display:flex}
      .menu a{text-align:center}
      .hero-grid,.grid-3,.grid-4,.timeline,.reviews,.articles,.footer-grid,.two-col,.split,.banner-row{grid-template-columns:1fr}
      .hero-copy{padding:22px}
      .section-head{align-items:start;flex-direction:column}
      .form-wrap form{grid-template-columns:1fr}
      .touch{display:inline-flex}
      table{min-width:860px}
    }
    .reveal{opacity:0;transform:translateY(14px);transition:.6s ease}
    .reveal.in{opacity:1;transform:none}