:root{--navy:#10263D;--paper:#fff;--paper-2:#F3F5F7;--text:#132738;--text-soft:#51677C;
  --line:rgba(19,39,56,.14);--shu:#C8452D;
  --gothic:"AR Pcrystal Rgothic JIS","Zen Maru Gothic","Zen Kaku Gothic New","Hiragino Kaku Gothic ProN",sans-serif;
  --mincho:"Zen Old Mincho","Hiragino Mincho ProN",serif}
*{box-sizing:border-box;margin:0;padding:0}
body{font-family:var(--gothic);color:var(--text);background:var(--paper);line-height:1.95;font-size:16.5px;
  -webkit-font-smoothing:antialiased}
.wrap{width:min(820px,90vw);margin:0 auto}
header{border-bottom:1px solid var(--line);padding:20px 0;position:sticky;top:0;background:rgba(255,255,255,.97);z-index:10}
.hd{display:flex;align-items:center;justify-content:space-between;gap:16px}
.logo{font-family:var(--gothic);font-weight:700;font-size:1.36rem;letter-spacing:.08em;
  color:var(--navy);text-decoration:none}
.back{font-size:.95rem;color:var(--text-soft);text-decoration:none}
.back:hover{color:var(--shu)}
main{padding:56px 0 90px}
h1{font-family:var(--mincho);font-weight:900;font-size:clamp(1.9rem,4.4vw,2.8rem);
  line-height:1.35;margin-bottom:14px}
.upd{font-size:.95rem;color:var(--text-soft);margin-bottom:44px}
h2{font-family:var(--mincho);font-weight:700;font-size:clamp(1.24rem,2.6vw,1.5rem);
  margin:44px 0 14px;padding-bottom:0}
p{margin-bottom:15px}
ul,ol{margin:0 0 15px 1.4em}
li{margin-bottom:8px}
dl.info{border-top:2px solid var(--text)}
dl.info > div{display:grid;grid-template-columns:11em 1fr;gap:20px;padding:18px 0;
  border-bottom:1px solid var(--line)}
dl.info dt{font-weight:700;color:var(--text-soft)}
dl.info dd{margin:0}
.todo{background:#FBEDE9;color:var(--shu);padding:3px 10px;font-size:.9rem;font-weight:700;
  display:inline-block}
.note{background:var(--paper-2);border-left:3px solid var(--shu);padding:18px 20px;margin:22px 0;
  font-size:.99rem;line-height:1.85}
footer{border-top:1px solid var(--line);padding:30px 0;font-size:.92rem;color:var(--text-soft)}
footer a{color:var(--text-soft);margin-right:18px}
@media(max-width:640px){ dl.info > div{grid-template-columns:1fr;gap:4px} }