:root{
  --ink:#1f2937; --sub:#5b6472; --line:#e3e7ee; --bg:#f7f8fa;
  --brand:#0f766e; --brand-dark:#115e59; --accent:#fef3c7; --card:#ffffff;
}
*{box-sizing:border-box}
body{margin:0;font-family:"Hiragino Kaku Gothic ProN","Hiragino Sans","Noto Sans JP",sans-serif;color:var(--ink);background:var(--bg);line-height:1.85;font-size:16px}
a{color:var(--brand-dark)}
header.site{background:#fff;border-bottom:1px solid var(--line)}
.wrap{max-width:880px;margin:0 auto;padding:0 20px}
.site-inner{display:flex;justify-content:space-between;align-items:center;padding:14px 0}
.logo{font-weight:700;font-size:19px;color:var(--ink);text-decoration:none}
.logo span{color:var(--brand)}
nav.main a{margin-left:18px;text-decoration:none;color:var(--sub);font-size:14px}
.hero{background:linear-gradient(135deg,#0f766e,#134e4a);color:#fff;padding:44px 0 36px}
.hero h1{font-size:27px;line-height:1.5;margin:0 0 12px}
.hero p{margin:0;opacity:.92}
main{padding:28px 0 56px}
.card{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:22px;margin:0 0 18px}
.card h2{margin-top:0;font-size:20px}
.article-list{list-style:none;padding:0;margin:0}
.article-list li{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:18px 20px;margin:0 0 14px}
.article-list .tag{display:inline-block;background:#ecfdf5;color:var(--brand-dark);font-size:12px;padding:2px 10px;border-radius:999px;margin-bottom:6px}
.article-list a.title{font-weight:700;font-size:18px;text-decoration:none;color:var(--ink);display:block}
.article-list p{margin:6px 0 0;color:var(--sub);font-size:14px}
.pr-note{background:var(--accent);border-radius:8px;padding:10px 14px;font-size:13px;margin:0 0 20px}
.bluf{background:#ecfdf5;border-left:4px solid var(--brand);padding:14px 18px;border-radius:0 8px 8px 0;margin:0 0 22px}
.bluf strong{display:block;margin-bottom:4px}
h1.post{font-size:25px;line-height:1.55;margin:6px 0 8px}
.meta{color:var(--sub);font-size:13px;margin-bottom:18px}
.post-body h2{font-size:20px;border-bottom:2px solid var(--brand);padding-bottom:6px;margin:34px 0 12px}
.post-body h3{font-size:17px;margin:24px 0 8px}
table{border-collapse:collapse;width:100%;margin:14px 0;font-size:14.5px;background:#fff}
th,td{border:1px solid var(--line);padding:9px 11px;text-align:left;vertical-align:top}
th{background:#f0fdfa}
.cta{background:#fff7ed;border:1px solid #fed7aa;border-radius:12px;padding:18px;text-align:center;margin:26px 0}
.cta a.btn{display:inline-block;background:var(--brand);color:#fff;text-decoration:none;font-weight:700;padding:12px 28px;border-radius:999px}
.cta .note{font-size:12.5px;color:var(--sub);margin-top:8px}
.faq dt{font-weight:700;margin-top:16px}
.faq dd{margin:4px 0 0}
.sources{font-size:13px;color:var(--sub)}
footer.site{border-top:1px solid var(--line);background:#fff;padding:22px 0;color:var(--sub);font-size:13px}
footer.site a{color:var(--sub);margin-right:14px}
@media(max-width:640px){.hero h1{font-size:22px}h1.post{font-size:21px}nav.main a{margin-left:12px}}

.eyecatch{margin:0 0 22px}
.eyecatch img{width:100%;height:auto;display:block;border-radius:12px}
.eyecatch figcaption{color:var(--sub);font-size:12px;margin-top:6px}
.article-list img.thumb{width:100%;height:auto;display:block;border-radius:8px;margin-bottom:10px}