:root{--bg:#000;--panel:#141416;--line:rgba(255,255,255,.1);--t1:#F5F5F7;--t2:#A1A1A6;--t3:#6E6E73;--link:#2997FF;--up:#30D158}
*{box-sizing:border-box}html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--t2);font:17px/1.65 -apple-system,BlinkMacSystemFont,"Segoe UI",Inter,system-ui,sans-serif;-webkit-font-smoothing:antialiased}
a{color:var(--link);text-decoration:none}a:hover{text-decoration:underline}
.nav{position:sticky;top:0;z-index:10;background:rgba(0,0,0,.72);backdrop-filter:saturate(180%) blur(20px);-webkit-backdrop-filter:saturate(180%) blur(20px);border-bottom:1px solid var(--line)}
.nav-in{max-width:1000px;margin:0 auto;height:48px;padding:0 20px;display:flex;align-items:center;justify-content:space-between;gap:16px}
.brand{display:flex;align-items:center;gap:8px;color:var(--t1);font-weight:600;font-size:15px;letter-spacing:-.02em}.brand:hover{text-decoration:none}
.brand img{width:24px;height:24px;border-radius:7px}
.links{display:flex;align-items:center;gap:24px;font-size:13px}.links a{color:var(--t2)}.links a:hover{color:var(--t1);text-decoration:none}
.btn{display:inline-flex;align-items:center;justify-content:center;height:30px;padding:0 14px;border-radius:999px;background:var(--t1);color:#000!important;font-size:13px;font-weight:600}.btn:hover{background:#fff;text-decoration:none}
.btn-lg{height:46px;padding:0 26px;font-size:16px}
@media (max-width:640px){.links .hide-sm{display:none}}
main{max-width:740px;margin:0 auto;padding:40px 20px 80px}
.crumbs{font-size:13px;color:var(--t3);margin-bottom:24px}.crumbs a{color:var(--t3)}
.cat{font-size:15px;font-weight:600;color:var(--up);margin:0 0 8px}.cat a{color:var(--up)}
h1{color:var(--t1);font-size:clamp(32px,6vw,48px);line-height:1.08;letter-spacing:-.035em;margin:0}
.meta{font-size:14px;color:var(--t3);margin:14px 0 0}
.answer{margin:32px 0 16px;padding:22px 24px;border-radius:18px;background:var(--panel);border:1px solid var(--line)}
.answer strong{display:block;color:var(--t1);font-size:13px;letter-spacing:.02em;text-transform:uppercase;margin-bottom:6px}
.answer p{margin:0;color:var(--t1);font-size:18px;line-height:1.55}
.facts{margin:0 0 32px;padding:18px 24px;border-radius:18px;border:1px solid var(--line)}
.facts h2{margin:0 0 8px;font-size:13px;letter-spacing:.02em;text-transform:uppercase;color:var(--t1)}
.facts dl{margin:0;display:grid;grid-template-columns:minmax(120px,auto) 1fr;gap:6px 18px;font-size:15px}
.facts dt{color:var(--t3)}.facts dd{margin:0;color:var(--t1);font-variant-numeric:tabular-nums}
h2{color:var(--t1);font-size:26px;line-height:1.2;letter-spacing:-.025em;margin:44px 0 12px}
h3{color:var(--t1);font-size:19px;letter-spacing:-.015em;margin:28px 0 8px}
p{margin:0 0 16px}ul,ol{padding-left:22px;margin:0 0 16px}li{margin:6px 0}strong{color:var(--t1);font-weight:600}
.formula{padding:14px 18px;border-left:3px solid var(--up);background:rgba(48,209,88,.07);border-radius:0 12px 12px 0;color:var(--t1);font-size:16px}
table{width:100%;border-collapse:collapse;margin:8px 0 20px;font-size:15px;display:block;overflow-x:auto}
th,td{text-align:left;padding:10px 12px;border-bottom:1px solid var(--line);white-space:nowrap}th{color:var(--t1);font-weight:600;font-size:13px}td{color:var(--t2)}
.faq details{border-bottom:1px solid var(--line);padding:14px 0}.faq summary{cursor:pointer;color:var(--t1);font-weight:600;list-style:none}
.faq summary::-webkit-details-marker{display:none}.faq summary::after{content:"+";float:right;color:var(--t3)}.faq details[open] summary::after{content:"–"}
.faq details p{margin:10px 0 0}
.cta{margin:48px 0 0;padding:32px;border-radius:22px;background:var(--panel);text-align:center}
.cta h2{margin:0 0 8px;font-size:26px}.cta p{margin:0 0 20px}
.disclaimer{margin-top:40px;font-size:13px;color:var(--t3)}
.related{margin-top:48px}.related h2{font-size:21px}
.grid{display:grid;gap:12px;grid-template-columns:repeat(auto-fill,minmax(280px,1fr))}
.card{display:block;padding:22px;border-radius:18px;background:var(--panel);border:1px solid var(--line);transition:border-color .2s}
.card:hover{border-color:rgba(255,255,255,.25);text-decoration:none}
.card .c{font-size:13px;font-weight:600;color:var(--up)}.card h3{margin:6px 0 8px;font-size:19px;line-height:1.3}.card p{margin:0;font-size:15px;color:var(--t2)}
.hero{text-align:center;padding:40px 0 24px}.hero p{font-size:20px;max-width:640px;margin:16px auto 0}
.section-head{display:flex;align-items:baseline;justify-content:space-between;gap:12px}.section-head a{font-size:15px}
.wide{max-width:1000px}
.plain li{margin:4px 0}.plain h2{font-size:21px;margin-top:32px}
footer{border-top:1px solid var(--line);padding:28px 20px;font-size:12px;color:var(--t3)}
.foot{max-width:1000px;margin:0 auto;display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px}.foot a{color:var(--t3)}.foot nav{display:flex;flex-wrap:wrap;gap:18px}