:root { --brand:#1D7AED; --text:#0B1220; --sub:#5B6470; --bg:#FFFFFF; --soft:#EAF2FE; --border:#E3E8EF; }
* { box-sizing:border-box; }
body { margin:0; font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"Hiragino Kaku Gothic ProN","Noto Sans JP",sans-serif; color:var(--text); background:var(--bg); line-height:1.8; }
.wrap { max-width:720px; margin:0 auto; padding:32px 20px 72px; }
.back { display:inline-block; color:var(--brand); text-decoration:none; font-size:14px; margin-bottom:16px; }
.back:hover { text-decoration:underline; }
h1 { font-size:24px; margin:0 0 4px; }
.updated { color:var(--sub); font-size:13px; margin:0 0 28px; }
h2 { font-size:18px; margin:28px 0 8px; }
p, li { font-size:15px; }
ul { padding-left:20px; }
a { color:var(--brand); }
footer { color:var(--sub); font-size:13px; margin-top:40px; border-top:1px solid var(--border); padding-top:16px; }