*{box-sizing:border-box;margin:0;padding:0}
:root{--bg:#ffffff;--fg:#14171f;--muted:#5b6472;--line:#e4e7ec;--accent:#1a56db;--soft:#f6f8fc}
body{font:16px/1.7 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;background:var(--bg);color:var(--fg)}
.wrap{max-width:860px;margin:0 auto;padding:0 20px}
header{border-bottom:1px solid var(--line);background:var(--bg);position:sticky;top:0;z-index:10}
header .wrap{display:flex;align-items:center;justify-content:space-between;padding-block:16px;gap:16px;flex-wrap:wrap}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:19px;letter-spacing:-.3px;text-decoration:none;color:var(--fg)}
.brand img{width:32px;height:32px;border-radius:7px}
nav{display:flex;gap:20px;flex-wrap:wrap}
nav a{color:var(--muted);text-decoration:none;font-size:15px}
nav a:hover{color:var(--accent)}
.hero{padding-block:64px 48px;border-bottom:1px solid var(--line)}
.hero h1{font-size:34px;line-height:1.25;letter-spacing:-.6px;margin-bottom:16px}
.hero p{color:var(--muted);font-size:17px;max-width:620px}
.tag{display:inline-block;background:var(--soft);color:var(--accent);font-size:13px;font-weight:600;padding:5px 12px;border-radius:999px;margin-bottom:18px}
section{padding-block:44px;border-bottom:1px solid var(--line)}
h2{font-size:22px;letter-spacing:-.3px;margin-bottom:18px}
h3{font-size:17px;margin:26px 0 8px}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:18px}
.card{border:1px solid var(--line);border-radius:12px;padding:20px;background:var(--soft)}
.card h3{margin-top:0;font-size:16px}
.card p{color:var(--muted);font-size:15px}
article p,article li{color:#2b313c;margin-bottom:12px}
article ul{padding-left:22px}
article h2{margin-top:32px;font-size:20px}
.meta{color:var(--muted);font-size:14px;margin-bottom:28px}
footer{padding-block:32px;color:var(--muted);font-size:14px}
footer a{color:var(--muted)}
table{width:100%;border-collapse:collapse;margin:12px 0 20px;font-size:15px}
th,td{border:1px solid var(--line);padding:10px 12px;text-align:left;vertical-align:top}
th{background:var(--soft);font-weight:600}
@media(max-width:600px){.hero h1{font-size:27px}}