:root{--ink:#20262d;--muted:#5b6673;--line:#d9e1e8;--soft:#f6f8fa;--accent:#0f766e;--warn:#b45309;--danger:#b91c1c;--white:#fff}*{box-sizing:border-box}body{margin:0;background:var(--soft);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;line-height:1.8}.site-header{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:14px 5vw;background:var(--white);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:5}.brand{font-weight:800;color:var(--ink);text-decoration:none}.site-header nav{display:flex;gap:10px;flex-wrap:wrap}.site-header nav a{color:var(--muted);text-decoration:none;font-size:.93rem}.page{max-width:1080px;margin:0 auto;padding:42px 5vw 64px}.eyebrow{color:var(--accent);font-weight:700;margin:0 0 8px}h1{font-size:clamp(2rem,4vw,3.5rem);line-height:1.2;margin:0 0 16px;letter-spacing:0}.lead{font-size:1.1rem;color:var(--muted);max-width:820px}section{margin-top:28px;background:var(--white);border:1px solid var(--line);border-radius:8px;padding:22px}h2{font-size:1.35rem;margin:0 0 12px}.notice{border-left:5px solid var(--accent)}.source-note{border-left:5px solid var(--warn)}.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:12px}.card{display:block;padding:14px;border:1px solid var(--line);border-radius:8px;text-decoration:none;color:var(--ink);background:#fff}.card span{display:block;color:var(--muted);font-size:.92rem;margin-top:4px}.table-wrap{overflow-x:auto}table{width:100%;border-collapse:collapse;min-width:680px}th,td{border:1px solid var(--line);padding:10px;text-align:left;vertical-align:top}th{background:#edf7f5}.check-list,.danger-list{padding-left:1.2em}.check-list li::marker{color:var(--accent)}.danger-list li::marker{color:var(--danger)}details{border:1px solid var(--line);border-radius:8px;padding:10px;margin:10px 0}summary{font-weight:700;cursor:pointer}.site-footer{text-align:center;color:var(--muted);padding:32px 5vw}@media(max-width:520px){.site-header{align-items:flex-start;position:static}.page{padding:28px 4vw 48px}section{padding:16px}.site-header nav a{font-size:.88rem}.grid{grid-template-columns:1fr}table{min-width:620px}}