:root{--ink:#0f172a;--muted:#475569;--line:#e2e8f0;--soft:#f8fafc;--blue:#2563eb;--blue-soft:#eff6ff;--white:#fff}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:var(--ink);background:var(--white)}
a{color:#1d4ed8}
.sitebar{border-bottom:1px solid var(--line);background:#fff;position:sticky;top:0;z-index:20}
.wrap{width:min(100% - 36px,1040px);margin:auto}
.sitebar .wrap{display:flex;justify-content:space-between;align-items:center;gap:16px;min-height:68px}
.brand{font-weight:850;text-decoration:none;color:var(--ink);font-size:1.15rem}
.brand span{color:var(--blue)}
.nav{display:flex;gap:14px;flex-wrap:wrap;justify-content:flex-end}
.nav a{text-decoration:none;color:var(--muted);font-weight:650;font-size:.93rem}
.hero{padding:64px 0 42px;background:linear-gradient(180deg,#fff 0%,var(--soft) 100%)}
.eyebrow{margin:0 0 12px;color:var(--blue);font-size:.8rem;font-weight:850;letter-spacing:.08em;text-transform:uppercase}
h1{font-size:clamp(2.1rem,5vw,3.7rem);line-height:1.03;letter-spacing:-.035em;margin:0 0 20px;max-width:900px}
.lead{font-size:1.15rem;line-height:1.72;color:var(--muted);max-width:780px;margin:0}
.breadcrumbs{font-size:.9rem;color:#64748b;margin-bottom:24px}
.breadcrumbs a{color:#64748b;text-decoration:none}
main article{padding:48px 0 70px}
.content{display:grid;grid-template-columns:minmax(0,1fr) 290px;gap:48px;align-items:start}
.prose h2{font-size:clamp(1.55rem,3vw,2.15rem);line-height:1.2;margin:42px 0 14px}
.prose h3{font-size:1.2rem;margin:28px 0 10px}
.prose p,.prose li{font-size:1.03rem;line-height:1.78;color:var(--muted)}
.prose ul{padding-left:22px}
.note{background:var(--blue-soft);border:1px solid #bfdbfe;border-radius:16px;padding:18px 20px;margin:24px 0}
.note strong{color:#1d4ed8}
.toc{position:sticky;top:92px;background:var(--soft);border:1px solid var(--line);border-radius:18px;padding:20px}
.toc strong{display:block;margin-bottom:12px}
.toc a{display:block;text-decoration:none;color:var(--muted);padding:7px 0;font-size:.94rem}
.cta{margin:36px 0;padding:24px;border-radius:20px;background:#0f172a;color:#fff}
.cta h2{color:#fff;margin:0 0 10px;font-size:1.5rem}
.cta p{color:#cbd5e1;margin:0 0 18px}
.btns{display:flex;gap:10px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:11px 16px;border-radius:11px;text-decoration:none;font-weight:800}
.btn.primary{background:#fff;color:#0f172a}.btn.secondary{border:1px solid #475569;color:#fff}
.faq details{border:1px solid var(--line);border-radius:14px;padding:16px 18px;margin:10px 0}
.faq summary{cursor:pointer;font-weight:800}
.related{margin-top:44px;padding-top:30px;border-top:1px solid var(--line)}
.related-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
.related a{display:block;border:1px solid var(--line);border-radius:14px;padding:16px;text-decoration:none;color:var(--ink);font-weight:750;background:#fff}
.disclaimer{font-size:.9rem!important;color:#64748b!important;border-top:1px solid var(--line);padding-top:22px;margin-top:38px}
footer{border-top:1px solid var(--line);padding:28px 0 40px;color:#64748b;font-size:.9rem;background:var(--soft)}
@media(max-width:820px){.content{grid-template-columns:1fr}.toc{position:static;order:-1}.nav{display:none}.hero{padding-top:46px}.related-grid{grid-template-columns:1fr}}