:root{
  --text:#222;
  --sub:#666;
  --line:#e6e6e6;
  --bg:#f7f7f7;
  --dark:#111;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:-apple-system,BlinkMacSystemFont,"Hiragino Kaku Gothic ProN","Yu Gothic",Meiryo,sans-serif;
  color:var(--text);
  line-height:1.9;
  background:#fff;
}
a{color:inherit}
.wrap{width:min(1040px,calc(100% - 36px));margin:auto}
.site-header{border-bottom:1px solid var(--line);padding:18px 0;background:#fff}
.brand{font-weight:700;font-size:18px;text-decoration:none}
.breadcrumb{font-size:13px;color:var(--sub);padding:16px 0 4px}
.breadcrumb a{text-decoration:none}
main{display:block}
article{max-width:840px;margin:0 auto;padding:28px 0 70px}
h1{font-size:clamp(28px,4vw,42px);line-height:1.45;margin:10px 0 18px}
h2{
  font-size:clamp(22px,3vw,30px);
  line-height:1.55;
  margin:52px 0 18px;
  padding-bottom:10px;
  border-bottom:2px solid var(--dark);
}
h3{font-size:20px;line-height:1.6;margin:30px 0 8px}
p{margin:0 0 1.35em}
ul{padding-left:1.35em}
.lead{font-size:18px;background:var(--bg);padding:24px;border-radius:8px}
.note{font-size:14px;background:#fafafa;border:1px solid var(--line);padding:18px;border-radius:8px}
.point{margin:24px 0;padding:20px 22px;border-left:4px solid var(--dark);background:#fafafa}
.cta{
  margin:50px 0 28px;padding:28px;background:#f5f5f5;
  border:1px solid var(--line);border-radius:10px;text-align:center
}
.cta h2{border:0;margin:0 0 8px;padding:0}
.btn{
  display:inline-block;margin:8px 5px 0;padding:13px 22px;background:#111;color:#fff;
  text-decoration:none;border-radius:4px;font-weight:700
}
.btn.secondary{background:#fff;color:#111;border:1px solid #111}
.related{margin-top:44px;border-top:1px solid var(--line);padding-top:28px}
.related h2{margin-top:0}
.related a{display:block;padding:10px 0}
.card-grid{
  display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px;margin:28px 0
}
.card{
  border:1px solid var(--line);border-radius:8px;padding:22px;text-decoration:none;background:#fff
}
.card h2{font-size:21px;border:0;margin:0 0 8px;padding:0}
.card p{color:var(--sub);font-size:14px;margin:0}
.site-footer{background:#111;color:#fff;padding:28px 0;font-size:13px;text-align:center}
@media(max-width:720px){
  .wrap{width:min(100% - 24px,1040px)}
  article{padding-top:18px}
  .lead{font-size:16px;padding:18px}
  .cta{padding:22px 16px}
  .btn{display:block}
  .card-grid{grid-template-columns:1fr}
}