*{box-sizing:border-box}body{margin:0;color:#171717;background:#fff;font:16px/1.9 -apple-system,BlinkMacSystemFont,"Noto Sans JP",sans-serif}main{max-width:920px;margin:auto;padding:48px 24px}h1{font-size:30px;line-height:1.5}h2{font-size:21px;margin-top:32px}h3{font-size:18px}a{color:inherit;text-underline-offset:4px}nav{display:flex;gap:18px;flex-wrap:wrap;padding:20px 0;border-block:1px solid #ddd}section{padding:18px 0;border-bottom:1px solid #ddd}p,li{overflow-wrap:anywhere}header,footer{margin-block:24px}table{width:100%;border-collapse:collapse}td,th{border:1px solid #ddd;padding:10px;text-align:left}dt{font-weight:600;margin-top:12px}dd{margin:0 0 10px}@media(max-width:500px){main{padding:28px 18px}h1{font-size:26px}nav{gap:12px}}