:root{--ink:#1a1f2e;--sub:#4a5268;--line:#e5e8f0;--bg:#fafbfe;--card:#fff;--accent:#4f5af0;--code:#f4f5fa;--max:860px}
*{margin:0;padding:0;box-sizing:border-box}
body{font:17px/1.75 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;color:var(--ink);background:var(--bg)}
.wrap{max-width:var(--max);margin:0 auto;padding:0 22px}
a{color:var(--accent)}
p{margin-bottom:14px;color:#2c3346}
p.lead{font-size:18px}
ul,ol{margin:0 0 16px 22px}
li{margin-bottom:8px;color:#2c3346}
code{background:var(--code);border:1px solid var(--line);border-radius:6px;padding:2px 7px;font-size:.88em;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace}
pre{background:#171b28;color:#dbe2f5;border-radius:12px;padding:18px 20px;overflow-x:auto;margin:14px 0 18px;font-size:14.5px;line-height:1.6}
pre code{background:none;border:none;color:inherit;padding:0}
table{border-collapse:collapse;width:100%;margin:14px 0 18px;font-size:15px}
th,td{border:1px solid var(--line);padding:8px 12px;text-align:left;vertical-align:top}
th{background:#f0f2fa;font-weight:600}
.sitebar{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:50}
.sitebar .wrap{display:flex;align-items:center;justify-content:space-between;height:56px}
.brand{font-weight:800;font-size:17px;color:var(--ink);text-decoration:none;letter-spacing:-.01em}
.brand span{color:var(--accent)}
.topnav{display:flex;gap:4px;flex-wrap:wrap}
.topnav a{color:var(--sub);text-decoration:none;font-size:15px;font-weight:500;padding:6px 12px;border-radius:8px}
.topnav a:hover{color:var(--accent);background:#eef0fb}
.crumb{font-size:14px;color:var(--sub);margin:26px 0 6px}
.crumb a{color:var(--sub);text-decoration:none}
.crumb a:hover{color:var(--accent)}
header.hero{background:linear-gradient(180deg,#eef0fb 0%,var(--bg) 100%);padding:44px 0 34px;text-align:center}
header.hero .kicker{display:inline-block;font-size:13px;font-weight:600;letter-spacing:.12em;text-transform:uppercase;color:var(--accent);background:#fff;border:1px solid var(--line);border-radius:99px;padding:5px 14px;margin-bottom:18px}
h1{font-size:clamp(28px,4.6vw,40px);line-height:1.22;letter-spacing:-.02em}
h1 span{color:var(--accent)}
header.hero .lede{max-width:640px;margin:16px auto 0;color:var(--sub);font-size:17.5px}
main{padding:8px 0 24px}
section{padding:26px 0;border-top:1px solid var(--line)}
section:first-of-type{border-top:none}
h2{font-size:25px;letter-spacing:-.01em;margin-bottom:14px}
h3{font-size:19px;margin:24px 0 8px}
.card{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:18px 22px;margin:14px 0}
.card h3{margin-top:0}
.steps{counter-reset:step;list-style:none;margin-left:0}
.steps>li{counter-increment:step;position:relative;padding-left:46px;margin-bottom:20px}
.steps>li::before{content:counter(step);position:absolute;left:0;top:2px;width:30px;height:30px;border-radius:50%;background:var(--accent);color:#fff;font-weight:700;font-size:15px;display:flex;align-items:center;justify-content:center}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:14px;margin:16px 0}
.grid a.card{display:block;text-decoration:none;color:var(--ink);margin:0;transition:transform .12s}
.grid a.card:hover{transform:translateY(-2px);border-color:#c9cdf5}
.grid .card b{display:block;font-size:16.5px;margin-bottom:4px}
.grid .card small{color:var(--sub);font-size:14px;line-height:1.5;display:block}
.tag{display:inline-block;font-size:12px;font-weight:600;color:var(--accent);background:#eef0fb;border-radius:6px;padding:2px 9px;margin:0 6px 6px 0}
.faq dt{font-weight:700;margin-top:18px}
.faq dd{margin:6px 0 0 0;color:var(--sub)}
.related{background:#f2f4fd;border:1px solid #dfe3f6;border-radius:14px;padding:18px 22px;margin-top:30px}
.related h3{margin:0 0 8px;font-size:16px}
.related a{display:block;padding:3px 0;text-decoration:none;font-size:15px}
footer.sitefoot{border-top:1px solid var(--line);margin-top:34px;padding:30px 0 44px;color:var(--sub);font-size:14.5px}
.footgrid{display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:18px;margin-bottom:16px}
.footgrid b{display:block;font-size:13px;text-transform:uppercase;letter-spacing:.08em;margin-bottom:6px}
.footgrid a{display:block;color:var(--sub);text-decoration:none;padding:2px 0;font-size:14.5px}
.footgrid a:hover{color:var(--accent)}
.copyright{text-align:center;font-size:13.5px}
@media(max-width:640px){.sitebar .wrap{height:auto;flex-direction:column;gap:6px;padding:10px 22px}}
main img{max-width:100%;height:auto;display:block;margin:16px auto;border-radius:10px;border:1px solid var(--line)}