:root{--ink:#0f172a;--muted:#475569;--line:#e2e8f0;--bg:#f8fafc;--brand:#1d4ed8;--card:#fff}
*{box-sizing:border-box}html{-webkit-text-size-adjust:100%}
body{margin:0;font-family:system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;color:var(--ink);background:var(--bg);line-height:1.6}
a{color:var(--brand)}
.wrap{max-width:960px;margin:0 auto;padding:0 20px}
header{background:#fff;border-bottom:1px solid var(--line)}
header .wrap{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:64px;flex-wrap:wrap}
.logo{font-weight:800;font-size:1.25rem;letter-spacing:.04em;color:var(--ink);text-decoration:none}
.logo span{color:var(--brand)}
nav a{color:var(--muted);text-decoration:none;margin-left:18px;font-size:.95rem;white-space:nowrap;display:inline-block}
nav a:hover,nav a.on{color:var(--ink)}
.hero{padding:56px 0 40px}
.hero h1{font-size:2rem;line-height:1.2;margin:0 0 12px}
.hero p{font-size:1.1rem;color:var(--muted);max-width:640px;margin:0}
section{padding:28px 0}
h2{font-size:1.35rem;margin:0 0 14px}
h3{font-size:1.05rem;margin:22px 0 8px}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:16px}
.card{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:20px}
.card h3{margin-top:0}
.card p{margin:0;color:var(--muted)}
.date dl{display:grid;grid-template-columns:max-content 1fr;gap:6px 18px;margin:0}
.date dt{color:var(--muted)}.date dd{margin:0}
.doc{background:#fff;border:1px solid var(--line);border-radius:12px;padding:28px;margin:32px 0}
.doc h1{font-size:1.6rem;margin:0 0 6px}.doc .upd{color:var(--muted);margin:0 0 20px;font-size:.9rem}
.doc p,.doc li{color:#1e293b}
footer{border-top:1px solid var(--line);background:#fff;margin-top:40px;padding:24px 0;font-size:.88rem;color:var(--muted)}
footer .wrap{display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px}
footer a{color:var(--muted)}
.anpc{display:flex;gap:10px;flex-wrap:wrap;margin-top:8px}
.anpc a{border:1px solid var(--line);border-radius:6px;padding:4px 10px;text-decoration:none;font-size:.8rem}
@media (max-width:600px){.hero h1{font-size:1.6rem}nav a{margin:0 14px 0 0}.doc{padding:20px}}