:root{--max:1120px;--ink:#0f172a;--muted:#5f6b7a;--line:#dbe3ee;--soft:#f6f8fc;--accent:#174ea6}
*{box-sizing:border-box}body{margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;color:var(--ink);line-height:1.68;background:#fff}.wrap{max-width:var(--max);margin:auto;padding:0 22px}.top{border-bottom:1px solid var(--line);background:#fff;position:sticky;top:0;z-index:5}.nav{display:flex;justify-content:space-between;align-items:center;gap:18px;padding:14px 22px;max-width:var(--max);margin:auto}.brand{font-weight:850;font-size:1.15rem;text-decoration:none;color:var(--ink)}.navlinks{display:flex;gap:16px;flex-wrap:wrap}.nav a{color:var(--ink);text-decoration:none;font-weight:650}.hero{padding:58px 0 36px;background:linear-gradient(180deg,#f8fbff,white)}.eyebrow{font-weight:800;color:var(--accent);text-transform:uppercase;letter-spacing:.06em;font-size:.78rem}h1{font-size:clamp(2.1rem,5vw,3.7rem);line-height:1.05;margin:.4rem 0 1rem;max-width:930px}h2{font-size:clamp(1.55rem,3vw,2.2rem);line-height:1.2}.lead{font-size:1.16rem;max-width:850px;color:#334155}.btns{display:flex;gap:12px;flex-wrap:wrap;margin-top:22px}.btn{display:inline-block;padding:12px 18px;border-radius:12px;background:var(--ink);color:white;text-decoration:none;font-weight:750}.btn.alt{background:white;color:var(--ink);border:1px solid var(--line)}.section{padding:42px 0;border-top:1px solid var(--line)}.toc{background:var(--soft);border:1px solid var(--line);border-radius:18px;padding:20px;margin:28px 0}.toc ul{columns:2;margin-bottom:0}.grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.grid.three{grid-template-columns:repeat(3,minmax(0,1fr))}.card{border:1px solid var(--line);border-radius:16px;padding:20px;background:#fff}.card h3{margin-top:0}.stage{display:grid;grid-template-columns:72px 1fr;gap:18px;padding:20px 0;border-bottom:1px solid var(--line)}.stage .n{font-size:1.55rem;font-weight:900}.chips{display:flex;flex-wrap:wrap;gap:8px;padding:0;list-style:none}.chips li{border:1px solid var(--line);border-radius:999px;padding:6px 11px;font-size:.9rem}.note{background:var(--soft);border:1px solid var(--line);border-radius:16px;padding:18px}.sources li{margin:.6rem 0}.footer{border-top:1px solid var(--line);padding:32px 0;margin-top:40px;color:var(--muted)}@media(max-width:800px){.nav{align-items:flex-start;flex-direction:column}.grid,.grid.three{grid-template-columns:1fr}.toc ul{columns:1}.stage{grid-template-columns:1fr}}