:root{
  --bg:#f6f7f9; --card:#fff; --ink:#141821; --muted:#697086;
  --line:#e6e8ee; --brand:#00b3a4;
  --radius:16px;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  background:var(--bg); color:var(--ink);
  font:16px/1.65 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  -webkit-font-smoothing:antialiased;
  padding:16px 16px calc(40px + env(safe-area-inset-bottom));
}
.wrap{max-width:720px;margin:0 auto}

.brand{display:flex;align-items:center;justify-content:center;margin:8px 0 24px}
.brand img{height:30px;width:auto}

.head{margin:0 0 20px}
.head h1{margin:0 0 6px;font-size:28px;line-height:1.2;letter-spacing:-.02em}
.updated{margin:0;color:var(--muted);font-size:14px}

.doc{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:24px 22px;
}
.doc > :first-child{margin-top:0}
.doc h2{
  margin:32px 0 10px;font-size:19px;line-height:1.3;letter-spacing:-.01em;
  padding-top:20px;border-top:1px solid var(--line);
}
.doc h2:first-of-type{border-top:0;padding-top:0;margin-top:24px}
.doc p{margin:0 0 14px}
.doc ul,.doc ol{margin:0 0 16px;padding-left:22px}
.doc li{margin:0 0 8px}
.doc a{color:var(--brand);overflow-wrap:anywhere}
.doc b,.doc strong{font-weight:600}

.foot{margin-top:24px;text-align:center;font-size:13px;color:var(--muted);line-height:1.6}
.foot nav{display:flex;flex-wrap:wrap;gap:6px 16px;justify-content:center;margin-bottom:10px}
.foot a{color:var(--muted)}
.foot p{margin:0}

@media (max-width:520px){
  .doc{padding:20px 16px;border-radius:12px}
  .head h1{font-size:24px}
}