:root{--ink:#0f172a;--mut:#475569;--bg:#f8fafc;--card:#fff;--line:#e2e8f0;--pri:#ea580c;--pri2:#c2410c;--dark:#0b1220;--r:14px}
*{box-sizing:border-box}html{scroll-behavior:smooth}
body{margin:0;font:16px/1.65 Inter,system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;color:var(--ink);background:var(--bg)}
a{color:var(--pri2)}img{max-width:100%;height:auto}
.wrap{max-width:1080px;margin:0 auto;padding:0 20px}
header.nav{position:sticky;top:0;z-index:20;background:rgba(11,18,32,.96);backdrop-filter:blur(8px)}
.nav .wrap{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:60px;flex-wrap:wrap}
.brand{color:#fff;font-weight:800;text-decoration:none;letter-spacing:-.02em}.brand span{color:var(--pri)}
.nav nav{display:flex;gap:4px;flex-wrap:wrap}.nav nav a{color:#cbd5e1;text-decoration:none;font-size:14px;padding:6px 10px;border-radius:8px}
.nav nav a:hover,.nav nav a[aria-current]{background:#1e293b;color:#fff}
.hero{background:radial-gradient(1200px 400px at 80% -10%,#9a3412 0,transparent 60%),var(--dark);color:#fff;padding:56px 0 72px}
.hero .wrap{display:grid;grid-template-columns:1.1fr .9fr;gap:36px;align-items:center}
.crumbs{font-size:13px;color:#94a3b8;margin-bottom:10px}.crumbs a{color:#cbd5e1}
.kicker{display:inline-block;background:#431407;color:#fdba74;border:1px solid #9a3412;font-size:12px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;padding:4px 10px;border-radius:99px}
h1{font-size:clamp(30px,4.4vw,48px);line-height:1.1;letter-spacing:-.03em;margin:14px 0}
.lead{color:#cbd5e1;font-size:18px;max-width:560px}
.btn{display:inline-block;background:var(--pri);color:#fff;font-weight:700;text-decoration:none;padding:13px 22px;border-radius:10px}
.btn:hover{background:var(--pri2)}.btn.ghost{background:transparent;border:1px solid #475569}
.badges{display:flex;gap:10px;flex-wrap:wrap;margin-top:22px}.badges img{height:48px;width:auto}
.trust{display:flex;gap:18px;flex-wrap:wrap;margin-top:22px;color:#94a3b8;font-size:14px}.trust b{color:#fff}
.calc{background:var(--card);color:var(--ink);border-radius:var(--r);padding:22px;box-shadow:0 20px 50px rgba(0,0,0,.35)}
.calc h2{margin:0 0 12px;font-size:18px}.grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.calc label{font-size:13px;font-weight:600;color:var(--mut);display:block}
.calc input,.calc select{width:100%;margin-top:4px;padding:10px;border:1px solid #cbd5e1;border-radius:8px;font:inherit}
.calc input:focus,.calc select:focus{outline:2px solid var(--pri);border-color:var(--pri)}
.out{margin-top:16px;background:#fff7ed;border:1px solid #fed7aa;border-radius:10px;padding:14px}
.out .big{font-size:34px;font-weight:800;color:var(--pri2);line-height:1.1}
.out dl{display:grid;grid-template-columns:1fr auto;gap:4px 12px;margin:10px 0 0;font-size:14px}.out dd{margin:0;font-weight:700;text-align:right}
.note{font-size:12px;color:var(--mut);margin-top:10px}
main{padding:56px 0}section{margin-bottom:48px}
h2.s{font-size:28px;letter-spacing:-.02em;margin:0 0 12px}h3{margin:22px 0 6px}
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:16px}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:20px}
a.card{text-decoration:none;color:inherit;transition:.15s}a.card:hover{border-color:var(--pri);transform:translateY(-2px)}
.card b{display:block;margin-bottom:4px}.card span{color:var(--mut);font-size:14px}
table{width:100%;border-collapse:collapse;background:var(--card);border-radius:var(--r);overflow:hidden;border:1px solid var(--line)}
th,td{padding:11px 14px;text-align:left;border-bottom:1px solid var(--line)}th{background:#f1f5f9;font-size:14px}
.tw{overflow-x:auto}
.formula{background:var(--dark);color:#fed7aa;border-radius:10px;padding:14px 18px;font-family:ui-monospace,Menlo,monospace;overflow-x:auto}
details{background:var(--card);border:1px solid var(--line);border-radius:10px;padding:14px 18px;margin-bottom:10px}
summary{font-weight:700;cursor:pointer}details p{margin:10px 0 0;color:var(--mut)}
.cta{background:var(--dark);color:#fff;border-radius:var(--r);padding:36px;text-align:center}.cta p{color:#cbd5e1}
footer{background:var(--dark);color:#94a3b8;padding:36px 0;font-size:14px}
footer .wrap{display:flex;gap:24px;justify-content:space-between;flex-wrap:wrap}footer a{color:#cbd5e1;display:block;margin:4px 0}
@media(max-width:820px){.hero .wrap{grid-template-columns:1fr}.hero{padding:36px 0 48px}}