:root{
  --navy:#131A2A;--navy-2:#0B111E;--ground:#F7F8FB;--card:#fff;--ink:#18202F;--ink-soft:#4A5468;
  --ink-faint:#8A93A6;--line:#E6E9F1;--accent:#F7931A;--accent-deep:#E27D0B;--accent-soft:#FFF2E0;
  --font:-apple-system,BlinkMacSystemFont,"SF Pro Display","SF Pro Text",system-ui,"Segoe UI",sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:var(--font);color:var(--ink);background:var(--ground);line-height:1.65;-webkit-font-smoothing:antialiased}
img{max-width:100%}
.top{position:sticky;top:0;background:rgba(11,17,30,.92);backdrop-filter:blur(10px);border-bottom:1px solid rgba(255,255,255,.08);z-index:10}
.top .in{max-width:1080px;margin:0 auto;padding:0 28px;height:64px;display:flex;align-items:center;gap:16px}
.top .brand{display:flex;align-items:center;gap:9px;text-decoration:none;color:#EAEEF6}
.top .brand svg{width:32px;height:32px}
.top .brand b{font-size:19px;font-weight:650;letter-spacing:-.02em}.top .brand b i{color:var(--accent);font-style:normal}
.top .sp{flex:1}
.top a.lnk{color:#8C95AB;text-decoration:none;font-size:14.5px;font-weight:500;white-space:nowrap}.top a.lnk:hover{color:#EAEEF6}
.top .cta{background:var(--accent);color:#fff;font-weight:600;font-size:14px;padding:9px 16px;border-radius:10px;text-decoration:none;white-space:nowrap}
@media(max-width:680px){.top a.lnk{display:none}}
.doc{max-width:720px;margin:0 auto;padding:48px 24px 0}
.kicker{font-size:12.5px;font-weight:650;letter-spacing:.1em;text-transform:uppercase;color:var(--accent)}
h1{font-size:40px;line-height:1.1;letter-spacing:-.028em;margin:14px 0 0;font-weight:720;text-wrap:balance}
.meta{font-size:13.5px;color:var(--ink-faint);margin-top:16px}
.lead{font-size:20px;line-height:1.55;color:var(--ink-soft);margin:24px 0 0}
.body{max-width:680px}
.body h2{font-size:25px;letter-spacing:-.02em;margin:44px 0 0;font-weight:680;text-wrap:balance}
.body h3{font-size:18.5px;margin:30px 0 0;font-weight:640}
.body p{font-size:17px;margin:16px 0 0}
.body ul,.body ol{font-size:17px;margin:16px 0 0;padding-left:24px}
.body li{margin:8px 0}
.body strong{color:var(--ink)}
.body blockquote{margin:24px 0 0;padding:14px 20px;border-left:3px solid var(--accent);background:var(--accent-soft);border-radius:0 10px 10px 0;font-size:16px;color:var(--ink)}
.body blockquote cite{display:block;margin-top:8px;font-size:13px;color:var(--ink-faint);font-style:normal}
.body a{color:var(--accent-deep);text-decoration:underline;text-underline-offset:2px}
.tldr{margin:24px 0 0;background:var(--card);border:1px solid var(--line);border-radius:14px;padding:20px 22px}
.tldr b{display:block;font-size:12.5px;font-weight:650;letter-spacing:.08em;text-transform:uppercase;color:var(--accent-deep);margin-bottom:8px}
.tldr p{font-size:16px;color:var(--ink);margin:0;line-height:1.55}
.cta-card{margin:48px 0 0;background:radial-gradient(700px 300px at 80% -20%,rgba(247,147,26,.18),transparent 60%),linear-gradient(190deg,var(--navy),var(--navy-2));border-radius:18px;padding:28px 30px;color:#EAEEF6}
.cta-card h3{font-size:21px;color:#fff;margin:0;font-weight:680;letter-spacing:-.01em}
.cta-card p{font-size:15px;color:#B9C1D2;margin:10px 0 0}
.cta-card a{display:inline-block;margin-top:18px;background:linear-gradient(180deg,#FCA435,var(--accent-deep));color:#fff;font-weight:640;font-size:15px;padding:12px 22px;border-radius:11px;text-decoration:none}
.more{margin:40px 0 0}.more .k{font-size:12.5px;font-weight:650;letter-spacing:.08em;text-transform:uppercase;color:var(--ink-faint)}
.more a{display:block;margin-top:12px;font-size:16px;font-weight:600;color:var(--ink);text-decoration:none}
.more a:hover{color:var(--accent-deep)}
.foot{border-top:1px solid var(--line);margin-top:56px}
.foot .in{max-width:720px;margin:0 auto;padding:26px 24px 44px;font-size:13px;color:var(--ink-faint);display:flex;flex-wrap:wrap;gap:16px;align-items:center}
.foot a{color:var(--ink-soft);text-decoration:none;font-weight:500}.foot a:hover{color:var(--ink)}
.foot .sp{flex:1}
.foot .disc{flex-basis:100%;line-height:1.55;color:#9aa2b3;margin-top:6px;font-size:12px}
@media(max-width:640px){h1{font-size:31px}.lead{font-size:18px}.body h2{font-size:22px}}

/* ── language picker (shared subpage nav) ── */
.langtrigger{display:inline-flex;align-items:center;gap:6px;line-height:1;font:inherit;font-size:13px;font-weight:600;color:#8C95AB;background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.14);border-radius:10px;padding:7px 10px;cursor:pointer;transition:.15s}
.langtrigger:hover{color:#EAEEF6;border-color:rgba(255,255,255,.28)}
.langtrigger[aria-expanded="true"]{color:#EAEEF6;border-color:var(--accent)}
.lt-flag{font-size:15px;line-height:1}.lt-code{letter-spacing:.02em}
.lt-caret{transition:transform .2s}.langtrigger[aria-expanded="true"] .lt-caret{transform:rotate(180deg)}
.langmenu{position:fixed;z-index:60;margin:0;padding:8px;display:grid;grid-template-columns:repeat(4,1fr);gap:4px;width:min(400px,calc(100vw - 24px));background:var(--card);border:1px solid var(--line);border-radius:16px;box-shadow:0 20px 50px rgba(15,23,41,.28),0 2px 8px rgba(15,23,41,.12);opacity:0;transform:translateY(-6px) scale(.97);pointer-events:none;transition:opacity .18s cubic-bezier(.22,1,.36,1),transform .18s cubic-bezier(.22,1,.36,1)}
.langmenu.open{opacity:1;transform:none;pointer-events:auto}.langmenu[hidden]{display:none}
.lang-item{display:flex;flex-direction:column;align-items:center;gap:3px;font:inherit;cursor:pointer;text-align:center;color:var(--ink);background:transparent;border:1px solid transparent;border-radius:11px;padding:9px 4px 7px;transition:.12s}
.lang-item:hover{background:var(--accent-soft)}.lang-item.is-current{background:var(--accent-soft);border-color:rgba(247,147,26,.35)}
.li-flag{font-size:22px;line-height:1}.li-cc{font-size:11px;font-weight:700;letter-spacing:.03em;color:var(--ink-faint)}
.lang-item.is-current .li-cc{color:var(--accent-deep)}
.li-name{font-size:11.5px;line-height:1.15;color:var(--ink-soft)}.lang-item.is-current .li-name{color:var(--ink)}
@media(prefers-reduced-motion:reduce){.langmenu{transition:opacity .12s linear}.lt-caret,.lang-item{transition:none}}