:root{
  --paper:#f7f2e9; --paper-soft:#fbf8f1; --ink:#292623; --muted:#74706a;
  --mist:#ccccc7; --accent:#db8554; --stamp:#b84d42; --hairline:rgba(41,38,35,.14);
  --serif:"Songti SC","Noto Serif CJK SC","Source Han Serif SC",Georgia,serif;
  --sans:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;color:var(--ink);background:var(--paper);
  font-family:var(--sans);line-height:1.75;
}
.wrap{max-width:720px;margin:0 auto;padding:48px 22px 80px}
header.site{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:40px;padding-bottom:18px;border-bottom:1px solid var(--hairline)}
.brand{display:flex;align-items:center;gap:12px}
.seal{flex:0 0 auto;width:46px;height:46px;display:grid;place-items:center;border:2px solid rgba(184,77,66,.55);border-radius:50%;color:var(--stamp);font:700 11px/1.05 var(--serif);text-align:center;transform:rotate(-12deg)}
.brand b{font:600 22px/1 var(--serif)}
nav a{color:var(--muted);text-decoration:none;font-size:14px;margin-left:16px}
nav a:hover{color:var(--ink)}
h1{font:600 clamp(30px,5vw,44px)/1.1 var(--serif);margin:0 0 8px}
.lead{color:var(--muted);font-size:18px;margin:0 0 28px}
h2{font:600 24px/1.2 var(--serif);margin:38px 0 10px}
h3{font:600 18px/1.3 var(--serif);margin:24px 0 6px}
p,li{font-size:16px}
.card{background:var(--paper-soft);border:1px solid var(--hairline);border-radius:12px;padding:20px 22px;margin:18px 0;box-shadow:0 10px 28px rgba(41,38,35,.05)}
.muted{color:var(--muted)}
.btn{display:inline-block;margin-top:8px;padding:11px 18px;border-radius:8px;background:var(--accent);color:#fffaf4;text-decoration:none;font-weight:600}
.btn.ghost{background:transparent;color:var(--ink);border:1px solid var(--hairline)}
a{color:var(--stamp)}
footer.site{margin-top:56px;padding-top:20px;border-top:1px solid var(--hairline);color:var(--muted);font-size:13px}
code{background:rgba(41,38,35,.06);padding:1px 6px;border-radius:4px;font-size:14px}
ul{padding-left:20px}