:root{--bg:#0f1720;--panel:#16212d;--line:#24364a;--text:#e6edf3;--muted:#9fb0c0;--accent:#f2b84b;--accent2:#3fb6a8;--radius:12px}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--text);font:17px/1.7 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif}
a{color:var(--accent2)}
a:hover{color:var(--accent)}
.wrap{max-width:1080px;margin:0 auto;padding:0 20px}
.top{position:sticky;top:0;z-index:10;background:rgba(15,23,32,.92);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.bar{display:flex;align-items:center;gap:16px;height:60px}
.logo{font-weight:800;color:var(--text);text-decoration:none;white-space:nowrap}
.links{display:flex;gap:4px;overflow-x:auto;margin-left:auto}
.links a{color:var(--muted);text-decoration:none;padding:6px 10px;border-radius:8px;font-size:15px;white-space:nowrap}
.links a:hover,.links a[aria-current]{color:var(--text);background:var(--panel)}
.menu{display:none;margin-left:auto;background:none;border:1px solid var(--line);color:var(--text);border-radius:8px;padding:4px 10px;font-size:18px}
@media(max-width:820px){.menu{display:block}.links{display:none;position:absolute;top:60px;left:0;right:0;flex-direction:column;background:var(--bg);border-bottom:1px solid var(--line);padding:8px 20px}body.open .links{display:flex}}
.hero{background:radial-gradient(ellipse at top,#1d4b5a 0%,var(--bg) 70%);padding:72px 0 48px;text-align:center}
.hero h1{font-size:clamp(30px,5vw,48px);line-height:1.15;margin:0 0 12px}
.hero p{color:var(--muted);max-width:720px;margin:0 auto 24px}
.facts{display:flex;flex-wrap:wrap;justify-content:center;gap:8px;margin:0 0 28px;padding:0;list-style:none}
.facts li{background:var(--panel);border:1px solid var(--line);border-radius:999px;padding:4px 14px;font-size:14px}
.cta{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}
.btn{display:inline-block;padding:11px 22px;border-radius:10px;text-decoration:none;font-weight:700}
.btn.primary{background:var(--accent);color:#1b1300}
.btn.ghost{border:1px solid var(--line);color:var(--text)}
h1{font-size:clamp(28px,4vw,38px);line-height:1.2;margin:8px 0 4px}
h2{font-size:26px;margin:44px 0 12px;padding-top:8px;scroll-margin-top:72px}
h3{font-size:20px;margin:28px 0 8px}
.meta{color:var(--muted);font-size:14px;margin:0 0 16px}
.crumbs{font-size:14px;color:var(--muted);margin-top:20px}
.answer{background:linear-gradient(90deg,rgba(242,184,75,.14),rgba(242,184,75,.04));border-left:4px solid var(--accent);border-radius:8px;padding:14px 18px;margin:16px 0}
.toc{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:14px 20px;margin:20px 0}
.toc ol{margin:6px 0 0;padding-left:20px;columns:2;column-gap:32px}
@media(max-width:640px){.toc ol{columns:1}}
table{width:100%;border-collapse:collapse;margin:14px 0;font-size:15px;display:block;overflow-x:auto}
th,td{border:1px solid var(--line);padding:9px 12px;text-align:left;vertical-align:top}
th{background:var(--panel)}
tbody tr:nth-child(even){background:rgba(255,255,255,.02)}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:14px;margin:16px 0}
.card{display:flex;flex-direction:column;gap:4px;background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:18px;text-decoration:none;color:var(--text);transition:border-color .15s,transform .15s}
.card:hover{border-color:var(--accent);transform:translateY(-2px);color:var(--text)}
.card .ico{font-size:26px}
.card small{color:var(--muted);line-height:1.5}
ol.steps{counter-reset:s;list-style:none;padding:0}
ol.steps>li{counter-increment:s;position:relative;padding:12px 16px 12px 56px;background:var(--panel);border:1px solid var(--line);border-radius:10px;margin:10px 0}
ol.steps>li::before{content:counter(s);position:absolute;left:16px;top:12px;width:28px;height:28px;border-radius:50%;background:var(--accent);color:#1b1300;font-weight:800;display:grid;place-items:center;font-size:14px}
.tip,.warn{border-radius:8px;padding:12px 16px;margin:14px 0}
.tip{background:rgba(63,182,168,.12);border-left:4px solid var(--accent2)}
.warn{background:rgba(232,98,88,.12);border-left:4px solid #e86258}
details{background:var(--panel);border:1px solid var(--line);border-radius:10px;margin:8px 0;padding:0 16px}
summary{cursor:pointer;font-weight:700;padding:12px 0}
details p{margin:0 0 14px;color:var(--muted)}
kbd{background:#24364a;border:1px solid #35506b;border-bottom-width:3px;border-radius:5px;padding:0 6px;font-size:14px;font-family:inherit}
.foot{border-top:1px solid var(--line);margin-top:60px;padding:28px 0;color:var(--muted);font-size:14px}
.foot nav{display:flex;flex-wrap:wrap;gap:6px 16px;margin-bottom:12px}
.foot a{color:var(--muted)}