/* 逆引きリファレンス（CH-595） */
.fs-ref__title { font-size: 26px; margin: 0 0 12px; }
.fs-ref__lead { margin: 0 0 20px; line-height: 1.8; }
.fs-ref__search { display: flex; gap: 8px; margin: 0 0 20px; }
.fs-ref__search input[type="search"] { flex: 1; min-width: 0; padding: 10px 12px; border: 1px solid #ccc; border-radius: 4px; font-size: 15px; }
.fs-ref__search button { padding: 10px 18px; border: 0; border-radius: 4px; background: #333; color: #fff; font-size: 15px; cursor: pointer; }
.fs-ref__cats { display: flex; flex-wrap: wrap; gap: 8px; margin: 0 0 24px; padding: 0; list-style: none; }
.fs-ref__cats a { display: inline-block; padding: 6px 12px; border: 1px solid #ccc; border-radius: 999px; font-size: 13px; text-decoration: none; color: #333; }
.fs-ref__cats a.is-current, .fs-ref__cats a:hover { background: #333; border-color: #333; color: #fff; }
.fs-ref__list { margin: 0; padding: 0; list-style: none; border-top: 1px solid #e5e5e5; }
.fs-ref__item { padding: 14px 4px; border-bottom: 1px solid #e5e5e5; }
.fs-ref__link { font-size: 16px; font-weight: bold; text-decoration: none; }
.fs-ref__excerpt { margin: 6px 0 0; font-size: 14px; color: #666; line-height: 1.7; }
.fs-ref-related { margin: 40px 0 0; padding: 16px 20px; border: 1px solid #e5e5e5; border-radius: 4px; background: #fafafa; }
.fs-ref-related__title { margin: 0 0 8px; font-weight: bold; }
.fs-ref-related ul { margin: 0; padding-left: 1.2em; }
.fs-ref-back { margin: 24px 0 0; }
@media screen and (max-width: 767px) {
  .fs-ref__title { font-size: 22px; }
  .fs-ref__search { flex-direction: column; }
}