:root{--bg:#FFF7E6;--card:#FFFFFF;--ink:#3A2E26;--sub:#7A6A5C;--acc:#E5B642;--line:#EADFCB}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--ink);font-family:"Hiragino Maru Gothic ProN","Hiragino Sans","Rounded Mplus 1c",sans-serif;line-height:1.8;font-size:16px}
header{padding:28px 16px 8px;text-align:center}
header a{color:var(--ink);text-decoration:none;font-weight:700;font-size:22px}
main{max-width:720px;margin:0 auto;padding:8px 16px 48px}
.card{background:var(--card);border:1px solid var(--line);border-radius:20px;padding:24px 22px;margin:16px 0}
h1{font-size:24px;margin:8px 0 4px}
h2{font-size:18px;margin:28px 0 8px;padding-left:10px;border-left:5px solid var(--acc)}
p,li{margin:6px 0}
ol,ul{padding-left:1.4em}
.sub{color:var(--sub);font-size:14px}
a{color:#B4791A}
nav ul{list-style:none;padding:0}
nav li{margin:10px 0}
nav a{display:block;background:var(--card);border:1px solid var(--line);border-radius:16px;padding:16px 18px;text-decoration:none;color:var(--ink);font-weight:700}
.mail{display:inline-block;background:var(--acc);color:#fff;font-weight:700;border-radius:999px;padding:12px 24px;text-decoration:none;margin:8px 0}
dt{font-weight:700;margin-top:16px}
dd{margin:4px 0 0 0}
footer{text-align:center;color:var(--sub);font-size:13px;padding:24px 16px}
.notice{border-left:5px solid var(--acc)}
.notice li{margin:8px 0}
.date{color:var(--sub);font-size:13px;margin-right:8px}
.toc{display:flex;flex-wrap:wrap;gap:8px;padding:0;list-style:none}
.toc a{display:inline-block;background:var(--card);border:1px solid var(--line);border-radius:999px;padding:8px 14px;text-decoration:none;color:var(--ink);font-size:14px;font-weight:700}
details{border-top:1px solid var(--line);padding:12px 0}
details:first-of-type{border-top:none}
summary{cursor:pointer;font-weight:700;list-style:none;padding-right:24px;position:relative}
summary::-webkit-details-marker{display:none}
summary::after{content:"＋";position:absolute;right:0;top:0;color:var(--acc)}
details[open] summary::after{content:"－"}
details p{margin:8px 0 0}
.btn{display:block;text-align:center;background:var(--acc);color:#fff;font-weight:700;border-radius:999px;padding:14px 20px;text-decoration:none;margin:12px 0}
.note{background:#FFF1D2;border-radius:14px;padding:12px 14px;font-size:14px}