:root{font-family:system-ui,-apple-system,"Segoe UI",sans-serif;color:#24354a;background:#f3f6fa;line-height:1.8}*{box-sizing:border-box}body{margin:0}main{width:min(820px,calc(100% - 32px));margin:48px auto;background:white;padding:clamp(24px,5vw,52px);border:1px solid #dce4ed;border-radius:20px}h1{font-size:30px;letter-spacing:-1px;line-height:1.3}h2{font-size:19px;margin-top:32px}a{color:#2457a0;text-underline-offset:3px}.brand{font-weight:800;color:#173b63}.meta{font-size:13px;color:#64748b}.notice{padding:18px;background:#edf4ff;border-radius:12px}li{margin:8px 0}footer{margin-top:36px;padding-top:20px;border-top:1px solid #dde5ef;font-size:13px}nav{display:flex;gap:18px;flex-wrap:wrap}