*{box-sizing:border-box}body{margin:0;font-family:-apple-system,"Hiragino Sans","Noto Sans JP",sans-serif;color:#222;line-height:1.85;background:#f7f8f6}
a{color:#1f6f5c}header,footer{background:#fff;border-bottom:1px solid #e3e6e2}footer{border-top:1px solid #e3e6e2;border-bottom:0;font-size:13px;color:#666;margin-top:40px}
.w{max-width:720px;margin:0 auto;padding:14px 18px}.logo{font-weight:700;font-size:20px;color:#1f6f5c;text-decoration:none}
.pr{display:inline-block;background:#555;color:#fff;font-size:12px;padding:2px 8px;border-radius:3px;margin-bottom:8px}
.prbar{background:#fff7e0;border:1px solid #f0d58a;font-size:13px;padding:8px 12px;border-radius:6px}
main{background:#fff;max-width:720px;margin:16px auto;padding:20px 18px;border-radius:10px}
h1{font-size:22px;line-height:1.5}h2{font-size:19px;border-left:5px solid #1f6f5c;padding-left:10px;margin-top:36px}h3{font-size:16px}
.box{background:#eef6f3;border-radius:8px;padding:12px 16px}.steps li{margin-bottom:8px}
.cta{display:block;text-align:center;background:#e8590c;color:#fff;font-weight:700;font-size:18px;padding:16px;border-radius:40px;text-decoration:none;margin:24px 0 6px;box-shadow:0 3px 0 #a63e06}
.note{font-size:12px;color:#666}details{border-bottom:1px solid #ddd;padding:10px 0}summary{font-weight:700;cursor:pointer}
nav a{margin-right:12px;font-size:14px}input,textarea{width:100%;padding:10px;border:1px solid #ccc;border-radius:6px;font-size:16px;margin:4px 0 12px}button{padding:12px 24px;font-size:16px;border:0;border-radius:6px;background:#1f6f5c;color:#fff}
.card{display:block;border:1px solid #e3e6e2;border-radius:8px;padding:14px;text-decoration:none;color:#222;margin:12px 0}
@media(min-width:760px){h1{font-size:28px}main{padding:32px 40px}}