/* ===== 関連コラム枠（商品一覧・商品詳細ページ共通） ===== */
.related-columns { margin-top: 16px; width: 100%; background: #fff; border: 1px solid #E5E7EB; border-radius: 10px; padding: 16px; box-shadow: 0 2px 5px rgba(15,23,42,.06); }
.related-columns__head { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 14px; }
.related-columns__title { display: flex; align-items: center; gap: 8px; margin: 0; font-size: 16px; font-weight: 700; color: #1593A5; }
.related-columns__title::before { content: ""; width: 4px; height: 18px; border-radius: 2px; background: #1593A5; flex: none; }
.related-columns__more-pc { font-size: 13px; color: #0E7A8F; text-decoration: none; white-space: nowrap; }
.related-columns__more-pc:hover { text-decoration: underline; }
/* minmax(0,1fr)：画像が読めない・タイトルが長いときも列の幅が崩れないようにする */
.related-columns__list { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; margin: 0; padding: 0; list-style: none; }
.related-columns__item a { display: block; color: inherit; text-decoration: none; }
/* contain：縦横比を保ったまま枠内に収め、はみ出し分（余白）は背景色で埋める。
   coverだと画像がトリミングされるため、変形・見切れなしの表示を優先する */
.related-columns__thumb { display: block; width: 100%; height: auto; aspect-ratio: 16 / 9; object-fit: contain; border-radius: 8px; background: #F3F4F6; }
.related-columns__name { margin: 8px 0 0; font-size: 14px; font-weight: 700; line-height: 1.5; color: #1F2937;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.related-columns__item a:hover .related-columns__name { color: #0E7A8F; text-decoration: underline; }
.related-columns__item a:hover .related-columns__thumb { opacity: .85; }
.related-columns__more-sp { display: none; }
/* スマホ（767px以下）：縦に並べたリスト＋下に「もっと見る」ボタン */
@media (max-width: 767px) {
  .related-columns__more-pc { display: none; }
  .related-columns__list { grid-template-columns: minmax(0, 1fr); gap: 0; }
  .related-columns__item + .related-columns__item { border-top: 1px solid #E5E7EB; }
  .related-columns__item a { display: flex; gap: 12px; padding: 12px 0; align-items: center; }
  .related-columns__thumb { width: 104px; flex: none; aspect-ratio: 16/9; border-radius: 6px; }
  .related-columns__name { margin: 0; -webkit-line-clamp: 3; }
  .related-columns__more-sp { display: block; margin-top: 8px; padding: 12px 16px; border: 2px solid #0E7A8F; border-radius: 8px; color: #0E7A8F; font-size: 14px; font-weight: 700; text-align: center; text-decoration: none; }
}
/* ===== ここまで ===== */