:root{--blue:#1F5BFF;--ink:#0B1020;--muted:#5A6275;--line:#E6E9F0;--bg:#fff;--soft:#F5F7FC}
@media(prefers-color-scheme:dark){:root{--ink:#F2F4F8;--muted:#A3AAB8;--line:#262B36;--bg:#0B0D12;--soft:#141821}}
*{box-sizing:border-box}html{-webkit-text-size-adjust:100%}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"SF Pro Text","Segoe UI",Roboto,Helvetica,Arial,sans-serif;color:var(--ink);background:var(--bg);line-height:1.6}
a{color:var(--blue);text-decoration:none}a:hover{text-decoration:underline}
.wrap{max-width:760px;margin:0 auto;padding:0 24px}
header{border-bottom:1px solid var(--line)}header .wrap{display:flex;align-items:center;justify-content:space-between;height:64px}
.brand{display:flex;align-items:center;gap:10px;font-weight:600;color:var(--ink)}.brand img{width:32px;height:32px;border-radius:8px}
nav a{margin-left:18px;color:var(--muted);font-size:15px}
.hero{text-align:center;padding:72px 0 48px}.hero img{width:128px;height:128px;border-radius:28px;box-shadow:0 12px 40px rgba(31,91,255,.25)}
h1{font-size:44px;letter-spacing:-.02em;line-height:1.1;margin:28px 0 12px}.lead{font-size:20px;color:var(--muted);margin:0 auto 28px;max-width:560px}
.btn{display:inline-block;background:var(--blue);color:#fff;padding:12px 22px;border-radius:999px;font-weight:600}.btn:hover{text-decoration:none;opacity:.92}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:16px;padding:24px 0 56px}
.card{background:var(--soft);border-radius:16px;padding:20px}.card h3{margin:0 0 6px;font-size:17px}.card p{margin:0;color:var(--muted);font-size:15px}
.doc{padding:48px 0 64px}.doc h1{font-size:34px;margin-top:0}.doc h2{font-size:21px;margin-top:36px}.meta{color:var(--muted);font-size:14px}
footer{border-top:1px solid var(--line);color:var(--muted);font-size:14px;padding:28px 0}footer a{color:var(--muted);margin-right:16px}