:root{--ink:#34272b;--muted:#725d63;--line:#eadde0;--soft:#fff7f8;--accent:#b86b7a;--accent-dark:#8d4453;--bg:#fffdfd}
*{box-sizing:border-box}
html{font-family:-apple-system,BlinkMacSystemFont,"Hiragino Sans","Yu Gothic",Meiryo,sans-serif;color:var(--ink);background:var(--bg);line-height:1.8}
body{margin:0}
a{color:var(--accent-dark);text-decoration:none}
a:hover{text-decoration:underline}
.site-header{position:sticky;top:0;z-index:3;background:rgba(255,253,253,.96);border-bottom:1px solid var(--line);padding:14px clamp(16px,4vw,40px);display:flex;gap:18px;align-items:center;justify-content:space-between}
.brand{font-weight:800;color:var(--ink);font-size:20px;letter-spacing:0}
.global-nav{display:flex;gap:8px;flex-wrap:wrap;justify-content:flex-end}
.global-nav a{font-size:13px;padding:6px 8px;border-radius:6px;color:var(--muted)}
main{max-width:1040px;margin:0 auto;padding:22px clamp(16px,4vw,36px) 56px}
.breadcrumb{font-size:13px;color:var(--muted);display:flex;gap:10px;flex-wrap:wrap;margin:8px 0 18px}
.breadcrumb span:before{content:"/";margin-right:10px;color:#b9a8ad}
.hero{padding:34px 0 28px;border-bottom:1px solid var(--line)}
.eyebrow{color:var(--accent-dark);font-weight:700;margin:0 0 8px;font-size:14px}
h1{font-size:clamp(28px,5vw,46px);line-height:1.25;margin:0 0 16px;letter-spacing:0}
.hero p:last-child{font-size:18px;color:var(--muted);max-width:760px;margin:0}
.content{display:grid;gap:26px;margin-top:30px}
.content section{padding:0}
h2{font-size:24px;line-height:1.35;margin:0 0 12px;border-left:4px solid var(--accent);padding-left:12px}
h3{font-size:17px;margin:0 0 8px}
p{margin:0 0 14px}
.check-list{padding:18px 20px 18px 42px;background:var(--soft);border:1px solid var(--line);border-radius:8px;margin:16px 0 0}
.check-list li{margin:4px 0}
.soft-note{background:var(--soft);border:1px solid var(--line);border-radius:8px;padding:18px}
.faq-list{display:grid;gap:10px}
details{border:1px solid var(--line);border-radius:8px;background:#fff;padding:12px 14px}
summary{cursor:pointer;font-weight:700;color:var(--ink)}
details p{margin:8px 0 0;color:var(--muted)}
.related-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
.related-card{display:block;border:1px solid var(--line);border-radius:8px;background:#fff;padding:14px;min-height:116px}
.related-card strong{display:block;color:var(--ink);line-height:1.45;margin-bottom:6px}
.related-card span{display:block;color:var(--muted);font-size:14px;line-height:1.6}
.site-footer{border-top:1px solid var(--line);background:#fff7f8;padding:28px clamp(16px,4vw,40px);display:grid;grid-template-columns:minmax(0,320px) 1fr;gap:20px}
.site-footer p{color:var(--muted);font-size:14px}
.site-footer nav{display:flex;gap:8px;flex-wrap:wrap;align-content:start}
.site-footer nav a{font-size:13px;color:var(--muted);padding:4px 0}
@media (max-width:760px){
  .site-header{position:static;display:block}
  .global-nav{justify-content:flex-start;margin-top:10px}
  .global-nav a{padding:5px 0;margin-right:10px}
  .related-grid{grid-template-columns:1fr}
  .site-footer{grid-template-columns:1fr}
  h1{font-size:30px}
  h2{font-size:21px}
}