:root{--bg:#f8fafc;--card:#fff;--text:#0f172a;--muted:#475569;--accent:#0ea5e9;--accent2:#0369a1;--border:#e2e8f0;--max:920px}
*{box-sizing:border-box}body{margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;background:var(--bg);color:var(--text);line-height:1.65}
a{color:var(--accent2)}a:hover{text-decoration:none}
.wrap{max-width:var(--max);margin:0 auto;padding:1rem 1.25rem 3rem}
header.site{border-bottom:1px solid var(--border);background:#fff;position:sticky;top:0;z-index:10}
header.site .wrap{display:flex;gap:1rem;align-items:center;justify-content:space-between;padding:.75rem 1.25rem}
.logo{font-weight:800;font-size:1.15rem;color:var(--text);text-decoration:none}
nav a{margin-left:.75rem;font-size:.95rem}
main article,main .card{background:var(--card);border:1px solid var(--border);border-radius:12px;padding:1.25rem 1.5rem;margin-top:1rem}
h1{line-height:1.2;font-size:clamp(1.6rem,4vw,2.1rem)}
h2{margin-top:1.5rem;font-size:1.25rem}h3{font-size:1.05rem}
.muted{color:var(--muted);font-size:.95rem}
.breadcrumb{font-size:.9rem;color:var(--muted);margin:.5rem 0 1rem}
.quick{background:#ecfeff;border:1px solid #a5f3fc;border-radius:10px;padding:1rem 1.1rem;margin:1rem 0}
.keypoints{margin:.5rem 0 1rem;padding-left:1.2rem}
table{width:100%;border-collapse:collapse;margin:1rem 0;font-size:.95rem}
th,td{border:1px solid var(--border);padding:.55rem .65rem;text-align:left;vertical-align:top}
th{background:#f1f5f9}
.faq details{border:1px solid var(--border);border-radius:8px;padding:.65rem .85rem;margin:.55rem 0;background:#fff}
.faq summary{cursor:pointer;font-weight:600}
.related ul,columns ul{padding-left:1.2rem}
.sitemap-list li{margin:.35rem 0}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:.75rem;margin:1rem 0}
.grid a.cardlink{display:block;background:#fff;border:1px solid var(--border);border-radius:10px;padding:.85rem;text-decoration:none;color:inherit}
.grid a.cardlink:hover{border-color:var(--accent);box-shadow:0 2px 8px rgba(14,165,233,.12)}
footer.site{margin-top:2rem;padding:1.5rem 0;border-top:1px solid var(--border);color:var(--muted);font-size:.9rem}
.lang-switch{font-size:.85rem}
.pill{display:inline-block;background:#e0f2fe;color:#075985;border-radius:999px;padding:.15rem .55rem;font-size:.8rem;margin-right:.35rem}
.hero{margin:1rem 0}
.hero img{width:100%;max-height:420px;object-fit:cover;border-radius:10px;display:block}
.hero figcaption{margin-top:.35rem;font-size:.85rem}