/* ランディングページ（index.html）と同じ色・書体（2026-10-18） */
:root{--g9:#123d31;--g7:#1f5c4a;--g5:#2f7a62;--mint:#e4efea;--paper:#f6f5f0;--ink:#1d2a24;--sub:#5a6660;--line:#dfe3e0;--card:#fff;--accent:#1f5c4a;--bg:#f6f5f0}
*{box-sizing:border-box}
body{margin:0;background:var(--paper);color:var(--ink);font:16px/1.85 -apple-system,"Hiragino Sans","Hiragino Kaku Gothic ProN",sans-serif;-webkit-font-smoothing:antialiased}
a{color:var(--g5)}
header.top{position:sticky;top:0;z-index:5;background:rgba(18,61,49,.95)}
header.top .wrap{max-width:1040px;margin:0 auto;padding:0 20px;display:flex;align-items:center;justify-content:space-between;height:56px}
.logo{display:flex;align-items:center;gap:10px;color:#fff;font-weight:800;font-size:18px;text-decoration:none}.logo img{width:30px;height:30px;border-radius:8px}
header.top nav a{color:#d6ece3;font-size:14px;margin-left:18px;text-decoration:none}
main{max-width:760px;margin:0 auto;padding:40px 20px 80px}
main>h1{font-size:30px;line-height:1.4;margin:0 0 8px}
h2{font-size:20px;margin:36px 0 10px;padding-left:12px;border-left:4px solid var(--g5)}
.sub{color:var(--sub);font-size:14px}
.card{background:var(--card);border:0;border-radius:16px;padding:16px 20px;margin:14px 0;box-shadow:0 4px 16px rgba(18,61,49,.06)}
.tblwrap{overflow-x:auto}.tbl{border-collapse:collapse;font-size:14px;min-width:540px;background:#fff}.tbl th,.tbl td{border:1px solid var(--line);padding:8px 10px;text-align:left;vertical-align:top}.tbl th{background:var(--mint)}
footer{background:var(--g9);color:#bfe0d3;padding:32px 0;font-size:14px}footer .wrap{max-width:1040px;margin:0 auto;padding:0 20px}footer a{color:#d6ece3;margin-right:16px}
@media (max-width:800px){header.top nav{display:none}main>h1{font-size:24px}}
details{background:#fff;border-radius:16px;padding:14px 18px;margin:10px 0;box-shadow:0 4px 16px rgba(18,61,49,.06)}summary{cursor:pointer;font-weight:700}details p{margin:8px 0 0;color:var(--sub)}