/* 固定的大图画布 + 稳定的百叶缩略图：不裁掉界面，不改变页面高度。 */
.exhibit-gallery { margin-top: 32px; }
.exhibit-frame { position: relative; aspect-ratio: 16 / 9; overflow: hidden; background: #eeeee8; border: 1px solid #e2e5db; border-radius: 4px; }
.exhibit-image { position: absolute; display: block; inset: 0; width: 100%; height: 100%; max-width: none; object-fit: contain; opacity: 0; transition: opacity 450ms ease; }
.exhibit-image.is-active { opacity: 1; }
.exhibit-description { display: flex; justify-content: space-between; align-items: start; gap: 24px; padding: 18px 0 16px; }
.exhibit-description > div { display: flex; align-items: baseline; gap: 18px; min-width: 0; }
.exhibit-counter { font-family: Georgia,serif; font-size: 12px; color: #7f8c73; white-space: nowrap; }
.exhibit-caption { font-size: 12px; color: #617059; line-height: 1.7; }
.exhibit-original { color: #818c77; font-size: 10px; text-decoration: none; white-space: nowrap; }
.exhibit-original:hover { text-decoration: underline; text-underline-offset: 4px; }
.exhibit-thumbnails { display: flex; height: 79px; gap: 8px; }
.exhibit-thumb { position: relative; flex: 1 1 0%; min-width: 0; padding: 0; border: 0; border-bottom: 2px solid transparent; background: #e9ebe2; cursor: pointer; overflow: hidden; transition: border-color 250ms ease; }
.exhibit-thumb img { display: block; width: 100%; height: 100%; object-fit: cover; opacity: .45; filter: saturate(.6); transition: opacity .3s, filter .3s; }
.exhibit-thumb.is-active { border-bottom-color: #5d7652; }
.exhibit-thumb.is-active img, .exhibit-thumb:hover img { opacity: 1; filter: none; }
.exhibit-thumb span { position: absolute; left: 6px; bottom: 6px; padding: 3px 6px; background: rgba(247,248,238,.9); color: #536b4d; font-size: 9px; border-radius: 2px; }
.case-gallery { margin-top: 0; }
@media (max-width: 600px) {
  .exhibit-description { gap: 12px; padding: 14px 0; }
  .exhibit-description > div { display: block; }
  .exhibit-counter { display: block; margin-bottom: 4px; font-size: 10px; }
  .exhibit-caption { font-size: 10px; }
  .exhibit-thumbnails { height: 48px; gap: 5px; }
  .exhibit-thumb span { font-size: 8px; padding: 2px 3px; left: 3px; bottom: 3px; }
}