:root{--ink:#1d2430;--muted:#5b6575;--line:#e3e7ee;--bg:#fbfcfd;--accent:#1f5fbf;--note:#fff8e6;--noteline:#f0d48a}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;font:17px/1.65 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;color:var(--ink);background:var(--bg)}
a{color:var(--accent)}
.wrap{max-width:720px;margin:0 auto;padding:0 20px}
header.site{border-bottom:1px solid var(--line);background:#fff}
header.site .wrap{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:8px;padding-top:14px;padding-bottom:14px}
.brand{font-weight:700;font-size:1.15rem;text-decoration:none;color:var(--ink)}
.brand span{color:var(--accent)}
nav a{margin-left:16px;text-decoration:none;color:var(--muted);font-size:.95rem}
nav a:first-child{margin-left:0}
main{padding:28px 0 48px}
h1{font-size:1.9rem;line-height:1.25;margin:.2em 0 .4em}
h2{font-size:1.3rem;margin-top:2em;border-top:1px solid var(--line);padding-top:1em}
h3{font-size:1.08rem;margin-top:1.5em}
.meta{color:var(--muted);font-size:.92rem}
.facts{border:1px solid var(--line);background:#fff;border-radius:8px;padding:6px 18px;margin:20px 0}
.facts dl{display:grid;grid-template-columns:minmax(120px,38%) 1fr;gap:6px 14px;margin:12px 0}
.facts dt{font-weight:600}
.facts dd{margin:0}
.note{background:var(--note);border:1px solid var(--noteline);border-radius:8px;padding:12px 16px;margin:20px 0;font-size:.96rem}
ol.steps>li{margin-bottom:.8em}
.guides{list-style:none;padding:0}
.guides li{border:1px solid var(--line);background:#fff;border-radius:8px;padding:14px 18px;margin-bottom:12px}
.guides a{font-weight:600;text-decoration:none}
.sources{font-size:.92rem}
.sources li{margin-bottom:.5em;word-break:break-word}
footer.site{border-top:1px solid var(--line);color:var(--muted);font-size:.88rem;padding:20px 0 40px}
footer.site a{color:var(--muted)}
@media (max-width:520px){body{font-size:16px}h1{font-size:1.55rem}.facts dl{grid-template-columns:1fr}.facts dt{margin-top:6px}}