:root{color-scheme:light dark;--bg:#f5f7fa;--surface:rgba(255,255,255,.86);--text:#1d1d1f;--muted:#636366;--line:rgba(60,60,67,.14);--accent:#1d9bf0}*{box-sizing:border-box}body{margin:0;background:radial-gradient(circle at 10% -10%,rgba(29,155,240,.18),transparent 34%),var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"Hiragino Sans","Noto Sans JP",sans-serif;-webkit-font-smoothing:antialiased}main{width:min(760px,calc(100% - 32px));margin:32px auto 72px;padding:clamp(24px,5vw,52px);border:1px solid var(--line);border-radius:28px;background:var(--surface);box-shadow:0 20px 60px rgba(0,0,0,.08);backdrop-filter:blur(24px)}a{color:var(--accent)}.back{text-decoration:none;font-weight:700}.eyebrow{margin:32px 0 4px;color:var(--accent);font-size:12px;font-weight:800;letter-spacing:.12em;text-transform:uppercase}h1{margin:0 0 8px;font-size:clamp(28px,6vw,42px);letter-spacing:-.04em}h2{margin:32px 0 10px;font-size:19px}p,li,dd{font-size:14px;line-height:1.85;color:var(--muted)}ul{padding-left:1.25em}dt{margin-top:14px;font-weight:750}dd{margin:3px 0 0}.updated{font-size:12px}.notice{padding:14px 16px;border-radius:14px;background:rgba(29,155,240,.09);color:var(--text)}footer{margin-top:40px;padding-top:18px;border-top:1px solid var(--line);font-size:12px;color:var(--muted)}@media(prefers-color-scheme:dark){:root{--bg:#09090b;--surface:rgba(28,28,30,.84);--text:#f5f5f7;--muted:#aaaab0;--line:rgba(255,255,255,.12)}body{background:radial-gradient(circle at 10% -10%,rgba(29,155,240,.2),transparent 34%),var(--bg)}}