:root{color-scheme:light;font-family:system-ui,-apple-system,"Segoe UI","Microsoft YaHei",sans-serif;color:#17312c;background:#f3f6f4;line-height:1.8}body{max-width:760px;margin:48px auto;padding:0 24px}header,main,footer{margin-bottom:28px}header{border-bottom:1px solid #b9cec5;padding-bottom:16px}h1{font-size:2rem;line-height:1.3}h2{font-size:1.25rem;margin-top:2rem}a{color:#0d6651;text-underline-offset:3px}nav a{margin-right:20px}main{background:white;padding:24px 32px;border-radius:12px}small,footer{color:#53645f}.lead{font-size:1.15rem}.notice{border-left:3px solid #659783;padding-left:16px}li{margin-bottom:8px}@media(max-width:600px){body{margin:24px auto;padding:0 16px}main{padding:16px 20px}}