:root{--accent:#0b7a75;--accent-bg:#e8f4f3;--text:#1f2328;--muted:#5b636b;--line:#dde2e6;--bg:#fff}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--text);font-family:system-ui,-apple-system,"Hiragino Sans","Hiragino Kaku Gothic ProN","Yu Gothic UI","Meiryo",sans-serif;font-size:16px;line-height:1.8}
a{color:var(--accent)}
.wrap{max-width:760px;margin:0 auto;padding:0 16px}
.site-header{border-bottom:1px solid var(--line);background:#fff}
.site-header .wrap{display:flex;flex-wrap:wrap;align-items:center;gap:4px 16px;padding-top:10px;padding-bottom:10px}
.logo{font-weight:700;font-size:18px;color:var(--text);text-decoration:none}
.gnav{display:flex;gap:4px 14px;flex-wrap:wrap;font-size:14px}
.gnav a{text-decoration:none}
.crumb ol{list-style:none;margin:12px 0 0;padding:0;display:flex;flex-wrap:wrap;font-size:13px;color:var(--muted)}
.crumb li+li::before{content:"›";margin:0 6px}
h1{font-size:24px;line-height:1.45;margin:12px 0 16px}
h2{font-size:20px;line-height:1.5;margin:36px 0 12px;padding-left:10px;border-left:4px solid var(--accent)}
p{margin:0 0 14px}
.answer{background:var(--accent-bg);border-radius:8px;padding:14px 16px;margin:0 0 20px}
.answer p{margin:0;font-size:17px}
.answer .answer-label{font-size:13px;font-weight:700;color:var(--accent);margin-bottom:4px}
.answer b,.answer strong{font-size:20px}
.tbl{overflow-x:auto;margin:0 0 16px}
table{border-collapse:collapse;width:100%;font-size:15px}
caption{text-align:left;font-size:13px;color:var(--muted);padding:0 0 6px}
th,td{border:1px solid var(--line);padding:8px 10px;text-align:right;white-space:nowrap}
thead th{background:#f5f7f8;text-align:center}
tbody th{text-align:left;background:#fafbfc;font-weight:600}
.note{display:block;font-size:12px;font-weight:400;color:var(--muted)}
.calc{border:2px solid var(--accent);border-radius:8px;padding:4px 16px 8px;margin:28px 0}
.calc h2{border:0;padding:0;margin:12px 0}
.calc form{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:10px}
.calc label{font-size:14px;display:flex;flex-direction:column}
.calc input{font-size:18px;padding:8px;border:1px solid var(--line);border-radius:6px;margin-top:4px;width:100%}
.calc output{grid-column:1/-1;background:var(--accent-bg);border-radius:6px;padding:10px;font-size:15px}
.calc output b{font-size:18px}
.tips{padding-left:1.4em}
.tips li{margin-bottom:10px}
.tips strong{display:block}
.faq dt{font-weight:700;margin-top:12px}
.faq dd{margin:4px 0 0}
.basis{background:#f7f8f9;border-radius:8px;padding:2px 16px 8px;margin-top:36px}
.basis h2{border:0;padding:0}
.basis ul{padding-left:1.2em}
.small{font-size:13px;color:var(--muted)}
.cards{list-style:none;padding:0;margin:0}
.cards li{border-bottom:1px solid var(--line);padding:10px 0}
.cards a{font-weight:600;display:block}
.cards span{font-size:13px;color:var(--muted)}
.ad-notice{font-size:12px;color:var(--muted);margin:10px 0 0}
.aff{border:1px solid var(--line);border-radius:8px;padding:2px 16px 12px;margin-top:28px}
.aff h2{border:0;padding:0;font-size:17px}
.hero{padding:16px 0 4px}
.page h2{font-size:19px}
.site-footer{border-top:1px solid var(--line);margin-top:48px;padding:16px 0 24px;background:#fafbfc}
.site-footer nav{display:flex;flex-wrap:wrap;gap:4px 16px;font-size:14px;margin-bottom:8px}
@media (min-width:640px){h1{font-size:28px}}