:root{font-family:system-ui,-apple-system,"Segoe UI","Microsoft YaHei",sans-serif;color:#172c3b;background:#f4f6f8;line-height:1.8}body{margin:0}main{max-width:820px;margin:48px auto;padding:36px;background:white;border:1px solid #dce4eb;border-radius:12px}nav{display:flex;gap:24px;flex-wrap:wrap;border-bottom:1px solid #dce4eb;padding-bottom:20px}a{color:#125c8c}h1{font-size:30px;line-height:1.3;margin:30px 0 12px}h2{font-size:20px;margin-top:28px}p,li{font-size:16px}.meta{color:#526676;font-size:14px}.notice{padding:14px 18px;background:#eef5fa;border-left:3px solid #125c8c}footer{margin-top:36px;border-top:1px solid #dce4eb;padding-top:16px;color:#526676;font-size:14px}@media(max-width:650px){main{margin:12px;padding:22px}h1{font-size:26px}}