:root{--navy:#1c2f4f;--ink:#1d2230;--muted:#5b6475;--line:#dde2ea;--bg:#ffffff;--soft:#f4f6f9}
*{box-sizing:border-box}
body{margin:0;font-family:"Segoe UI",Roboto,Helvetica,Arial,sans-serif;color:var(--ink);background:var(--bg);line-height:1.6}
header{border-bottom:1px solid var(--line);background:var(--bg)}
.wrap{max-width:820px;margin:0 auto;padding:0 20px}
header .wrap{display:flex;align-items:center;justify-content:space-between;gap:16px;padding-top:14px;padding-bottom:14px;flex-wrap:wrap}
header img{height:56px;width:auto}
nav a{color:var(--navy);text-decoration:none;font-weight:600;margin-left:18px}
nav a:hover{text-decoration:underline}
main{padding:36px 0 56px}
h1{color:var(--navy);font-size:30px;line-height:1.25;margin:0 0 12px}
h2{color:var(--navy);font-size:20px;margin:32px 0 8px}
p,li{max-width:70ch}
.box{background:var(--soft);border:1px solid var(--line);border-radius:8px;padding:16px 20px}
dl{display:grid;grid-template-columns:max-content 1fr;gap:6px 16px;margin:0}
dt{color:var(--muted)}
dd{margin:0}
footer{border-top:1px solid var(--line);color:var(--muted);font-size:14px;padding:18px 0}
footer a{color:var(--muted)}
@media(max-width:520px){dl{grid-template-columns:1fr}nav a{margin-left:0;margin-right:16px}}