:root{font-family:"Segoe UI","Yu Gothic UI",Meiryo,sans-serif;color:#243332;background:#fff;letter-spacing:0;line-height:1.85}
*{box-sizing:border-box}body{margin:0}a{color:#126e64;text-underline-offset:4px}a:focus-visible{outline:2px solid #126e64;outline-offset:4px}
header,main,footer{max-width:880px;margin:0 auto;padding:24px}header{display:flex;align-items:center;justify-content:space-between;gap:20px;border-bottom:1px solid #dce5e1;flex-wrap:wrap}
header>a{font-size:22px;font-weight:700;text-decoration:none}nav{display:flex;flex-wrap:wrap;gap:12px 22px;font-size:14px}nav a{display:inline-block;padding:6px 0}
main{padding-top:36px;padding-bottom:48px}h1{font-size:32px;line-height:1.4;margin:0 0 20px;overflow-wrap:anywhere}h2{font-size:19px;line-height:1.5;margin:32px 0 10px}p{margin:12px 0;overflow-wrap:anywhere}li{margin:8px 0}ul{padding-left:24px}.lead{font-size:18px}footer{border-top:1px solid #dce5e1;font-size:14px;color:#596b64}
@media(max-width:480px){header,main,footer{padding-left:20px;padding-right:20px}h1{font-size:26px}header{gap:8px}nav{gap:8px 16px}}