:root{--navy:#0b1e3f;--ice:#4fd1f5;--bg:#ffffff;--text:#0b1e3f;--muted:#5b6b82;--line:#e4e9f0;--card:#f5f8fb}
@media (prefers-color-scheme:dark){:root{--bg:#07142b;--text:#eef3f9;--muted:#9fb0c6;--line:#1a2c4d;--card:#0d1f3d}}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--text);font:17px/1.55 -apple-system,BlinkMacSystemFont,"SF Pro Text","Helvetica Neue",Arial,sans-serif}
a{color:inherit}
.wrap{max-width:720px;margin:0 auto;padding:0 20px}
header{border-bottom:1px solid var(--line)}
header .wrap{display:flex;align-items:center;justify-content:space-between;height:60px}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;text-decoration:none;letter-spacing:-.01em}
.mark{width:30px;height:30px;border-radius:8px;background:var(--navy);color:#fff;display:grid;place-items:center;font-size:13px;font-weight:800;position:relative;overflow:hidden}
.mark::after{content:"";position:absolute;left:0;right:0;bottom:6px;height:3px;background:var(--ice)}
nav a{color:var(--muted);text-decoration:none;margin-left:18px;font-size:15px}
nav a:hover{color:var(--text)}
main{padding:48px 0 72px}
h1{font-size:34px;line-height:1.15;letter-spacing:-.02em;margin:0 0 8px}
h2{font-size:21px;letter-spacing:-.01em;margin:36px 0 8px}
p,li{color:var(--text)}
.lede{font-size:20px;color:var(--muted);margin:0 0 28px}
.muted{color:var(--muted);font-size:15px}
ul{padding-left:22px}
li{margin:4px 0}
.card{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:18px 20px;margin:16px 0}
.feat{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:12px;margin:28px 0}
.feat .card{margin:0}
.feat b{display:block;margin-bottom:4px}
.feat span{color:var(--muted);font-size:15px}
.btn{display:inline-block;background:var(--navy);color:#fff;text-decoration:none;padding:12px 20px;border-radius:12px;font-weight:600}
@media (prefers-color-scheme:dark){.btn{background:var(--ice);color:var(--navy)}}
footer{border-top:1px solid var(--line);padding:24px 0;color:var(--muted);font-size:14px}
footer a{margin-right:16px}