:root{
    --bg:#f3faf7;--card:#fff;--line:#dcebe6;--txt:#0d2b26;--muted:#4f6b66;--dim:#84999a;
    --brand:#0f9b8e;--brand-dep:#0d7f76;--brand-soft:rgba(15,155,142,.10);--brand-line:rgba(15,155,142,.22);
    --radius:16px;
  }
  *{box-sizing:border-box}
  html{-webkit-text-size-adjust:100%}
  body{margin:0;background:var(--bg);color:var(--txt);
    font-family:system-ui,-apple-system,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;
    font-size:16px;line-height:1.75;-webkit-font-smoothing:antialiased}
  a{color:var(--brand-dep);text-decoration:none}
  a:hover{text-decoration:underline}
  header{position:sticky;top:0;z-index:9;background:rgba(243,250,247,.92);
    backdrop-filter:saturate(160%) blur(10px);border-bottom:1px solid var(--line)}
  .wrap{max-width:920px;margin:0 auto;padding:0 20px}
  .nav{display:flex;align-items:center;justify-content:space-between;gap:14px;height:60px}
  .brand{display:flex;align-items:center;gap:10px;color:var(--txt);font-weight:700;font-size:17px}
  .brand:hover{text-decoration:none}
  .brand .logo{width:30px;height:30px;border-radius:9px;background:var(--brand);display:grid;place-items:center;flex:0 0 auto}
  .brand .logo svg{width:18px;height:18px;fill:#fff}
  .brand small{display:block;font-size:9px;letter-spacing:.12em;color:var(--dim);font-weight:600}
  .nav-r{display:flex;align-items:center;gap:14px;font-size:14px}
  .nav-r a{color:var(--muted)}
  .btn{display:inline-block;padding:9px 16px;border-radius:10px;font-weight:600;font-size:14px;border:1px solid transparent;transition:.18s}
  .btn:hover{text-decoration:none}
  .btn-primary{background:var(--brand);color:#fff;box-shadow:0 6px 18px rgba(15,155,142,.28)}
  .nav-r .btn-primary{color:#fff}
  .nav-r a.btn:hover{text-decoration:none}
  .btn-primary:hover{background:var(--brand-dep)}
  .btn-ghost{background:#fff;border-color:var(--brand-line);color:var(--brand-dep)}
  .btn-ghost:hover{background:var(--brand-soft)}
  .crumb{font-size:13px;color:var(--dim);padding:18px 0 0}
  .crumb a{color:var(--dim)}
  .crumb span{margin:0 6px}
  article{padding:14px 0 40px}
  .tag{display:inline-block;padding:3px 10px;border-radius:999px;background:var(--brand-soft);
    color:var(--brand-dep);font-size:12px;font-weight:600;border:1px solid var(--brand-line)}
  h1{font-size:32px;line-height:1.32;margin:14px 0 12px;letter-spacing:-.01em}
  .lede{font-size:17px;color:var(--muted);margin:0 0 8px}
  .meta{font-size:13px;color:var(--dim);margin:14px 0 0}
  h2{font-size:23px;margin:38px 0 12px;line-height:1.4;letter-spacing:-.01em}
  h3{font-size:17px;margin:24px 0 8px}
  p{margin:12px 0}
  ul,ol{margin:12px 0;padding-left:22px}
  li{margin:6px 0}
  code{background:#eaf5f1;padding:1px 6px;border-radius:6px;font-size:14px;
    font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace}
  .note{background:#fff;border:1px solid var(--line);border-left:3px solid var(--brand);
    border-radius:10px;padding:14px 16px;margin:18px 0;font-size:15px;color:var(--muted)}
  .note b{color:var(--txt)}
  .toc{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:16px 20px;margin:22px 0}
  .toc h4{margin:0 0 8px;font-size:13px;letter-spacing:.04em;color:var(--dim);text-transform:uppercase}
  .toc ol{margin:0;padding-left:20px;font-size:15px}
  .toc a{color:var(--brand-dep)}
  .tablewrap{overflow-x:auto;-webkit-overflow-scrolling:touch;margin:18px 0;border-radius:12px}
  .tablewrap table{margin:0}
  table{width:100%;border-collapse:collapse;margin:18px 0;font-size:15px;background:#fff;
    border:1px solid var(--line);border-radius:12px;overflow:hidden}
  th,td{padding:11px 14px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
  th{background:#f7fcfa;font-weight:600;font-size:14px;color:var(--muted)}
  tr:last-child td{border-bottom:0}
  .cta{margin:40px 0 10px;background:linear-gradient(135deg,#0f9b8e,#0d7f76);color:#fff;
    border-radius:20px;padding:28px;display:flex;flex-wrap:wrap;gap:16px;align-items:center;justify-content:space-between}
  .cta h3{margin:0 0 4px;font-size:19px;color:#fff}
  .cta p{margin:0;color:rgba(255,255,255,.86);font-size:14px}
  .cta .btn{background:#fff;color:var(--brand-dep)}
  .rel{margin:26px 0 0;font-size:15px}
  .rel h3{font-size:15px;color:var(--dim);font-weight:600;margin:0 0 8px}
  .rel a{display:block;padding:10px 0;border-bottom:1px dashed var(--line)}
  footer{border-top:1px solid var(--line);padding:22px 0;color:var(--dim);font-size:13px;background:#fff}
  .foot{display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between}
  .foot a{color:var(--dim)}
  @media(max-width:640px){
    h1{font-size:25px}h2{font-size:20px}.lede{font-size:16px}
    .nav-r a{display:none}.cta{padding:22px}
    .tablewrap table{min-width:580px}
    th,td{padding:9px 11px;font-size:14px}
  }

/* ---- v2 新增块 ---- */
.lead{max-width:52em;margin:14px 0 18px;font-size:15.5px;line-height:1.85;color:var(--dim)}
.lead b{color:var(--text)}
.keypoints{margin:20px 0 26px;padding:16px 20px;background:rgba(15,155,142,.05);border-left:3px solid var(--brand,#0f9b8e);border-radius:8px}
.keypoints b{display:block;margin-bottom:8px;font-size:14px}
.keypoints ul{margin:0;padding-left:18px}
.keypoints li{margin:5px 0;font-size:14px;line-height:1.75}
.price-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin:26px 0 18px}
.price-card{border:1px solid var(--line,#e6e9ef);border-radius:12px;padding:20px 18px;background:#fff}
.price-card.hot{border-color:var(--brand,#0f9b8e);box-shadow:0 6px 20px rgba(15,155,142,.10)}
.price-card h3{margin:0 0 6px;font-size:15px}
.price-card .p{font-size:22px;font-weight:700;margin:6px 0 2px}
.price-card .p small{font-size:12px;font-weight:400;color:var(--dim)}
.price-card ul{margin:12px 0 0;padding-left:16px}
.price-card li{font-size:13px;line-height:1.9;color:var(--dim)}
.price-note{font-size:14px;line-height:1.85;color:var(--dim)}
.more-list{margin:14px 0 0;padding-left:18px}
.more-list li{margin:9px 0;font-size:14.5px;line-height:1.8}
.conclusion{margin:30px 0 0;padding:18px 20px;background:#f7f9fb;border:1px solid var(--line,#e6e9ef);border-radius:12px}
.conclusion h3{margin:0 0 8px;font-size:15px}
.conclusion p{margin:0;font-size:14.5px;line-height:1.85;color:var(--dim)}
@media(max-width:760px){.price-grid{grid-template-columns:1fr}}