:root{--ink:#1c2430;--muted:#5d6875;--line:#e3e7ec;--accent:#1b5e8c;--bg:#fff}
*{box-sizing:border-box}
body{margin:0;font:16px/1.6 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;color:var(--ink);background:var(--bg)}
.wrap{max-width:960px;margin:0 auto;padding:0 24px}
header{border-bottom:1px solid var(--line);background:#fbfcfd}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:64px}
.brand{font-weight:600;font-size:17px;color:var(--ink);text-decoration:none;display:flex;align-items:center;gap:10px}
.mark{display:inline-flex;align-items:center;justify-content:center;width:30px;height:30px;border-radius:6px;background:var(--accent);color:#fff;font-size:13px;font-weight:700}
nav a{margin-left:20px;color:var(--muted);text-decoration:none;font-size:15px}
nav a:hover{color:var(--accent)}
main{padding:44px 24px 64px}
h1{font-size:30px;line-height:1.25;margin:0 0 16px}
h2{font-size:18px;margin:0 0 8px}
.hero{padding:12px 0 36px;max-width:680px}
.lead{font-size:18px;color:var(--muted)}
.btn{display:inline-block;margin-top:10px;padding:11px 20px;background:var(--accent);color:#fff;text-decoration:none;border-radius:6px;font-size:15px}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:18px;margin:26px 0}
.card{border:1px solid var(--line);border-radius:8px;padding:20px}
.card p{margin:0;color:var(--muted);font-size:15px}
.muted{color:var(--muted)}
ul{color:var(--muted)}
footer{border-top:1px solid var(--line);padding:22px 0;color:var(--muted);font-size:14px;background:#fbfcfd}
@media(max-width:640px){nav a{margin-left:12px}h1{font-size:25px}}