/**
 * L14 · 配图位统一 4:3（须在 l14-page*-layout.css 之后加载）
 */
#l14-book {
  --l14-img-ratio: 4 / 3;
}

/* 左图右文 */
#l14-book .panel.panel-split {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.65rem;
  align-items: stretch;
}
@media (min-width: 640px) {
  #l14-book .panel.panel-split {
    grid-template-columns: minmax(200px, 48%) 1fr;
    gap: 0.75rem;
  }
}

/* 所有配图框：强制 4:3（压过各页 layout 的 min-height / flex） */
#l14-book .scene-frame,
#l14-book [class*="scene-frame--"],
#l14-book .panel.panel-split .scene-frame,
#l14-book .panel.panel-split [class*="scene-frame--"],
#l14-book .scene-carousel .scene-frame,
#l14-book .scene-stage .scene-frame,
#l14-book .scene-frame--story {
  position: relative;
  box-sizing: border-box;
  width: 100% !important;
  aspect-ratio: var(--l14-img-ratio) !important;
  height: auto !important;
  min-height: 0 !important;
  max-height: min(58vh, calc(100vw * 3 / 4)) !important;
  padding: 0 !important;
  margin: 0;
  flex: 0 0 auto !important;
  border-radius: 10px 14px 8px 12px;
  border: 2px solid var(--edge, #5d4037);
  background: #e8eef4 !important;
  overflow: hidden;
}

#l14-book .scene-carousel .scene-frame,
#l14-book .scene-stage .scene-frame {
  max-height: min(52vh, calc(100vw * 3 / 4)) !important;
}

#l14-book .scene-frame:has(img),
#l14-book [class*="scene-frame--"]:has(img),
#l14-book .scene-frame--story:has(img) {
  display: block !important;
}

/* 无图占位（保留 4:3） */
#l14-book .scene-frame:not(:has(img)),
#l14-book .scene-frame--passage:not(:has(img)) {
  display: flex !important;
  align-items: center;
  justify-content: center;
  padding: 0.75rem !important;
  text-align: center;
  font-weight: 900;
  line-height: 1.35;
  color: #f8fafc;
  background: linear-gradient(145deg, #0f172a, #1e3a5f) !important;
}

/* 图片铺满 4:3 框 */
#l14-book .scene-frame img,
#l14-book [class*="scene-frame--"] img,
#l14-book .scene-frame--story img {
  position: absolute;
  inset: 0;
  z-index: 1;
  width: 100% !important;
  height: 100% !important;
  max-width: none !important;
  max-height: none !important;
  margin: 0;
  padding: 0;
  aspect-ratio: var(--l14-img-ratio);
  object-fit: cover !important;
  object-position: center center;
  display: block;
  cursor: zoom-in;
}

/* 语料缩略图：外层 4:3 */
#l14-book .corpus-fig {
  position: relative;
  margin: 0;
  width: 100%;
  aspect-ratio: var(--l14-img-ratio) !important;
  padding: 0;
  border-radius: 10px;
  overflow: hidden;
  border: 2px solid #e2e8f0;
  background: #e8eef4;
}
#l14-book .corpus-fig img {
  position: absolute;
  inset: 0;
  width: 100% !important;
  height: 100% !important;
  aspect-ratio: var(--l14-img-ratio);
  object-fit: cover !important;
  object-position: center;
  display: block;
  background: #e8eef4;
  cursor: zoom-in;
}

/* 点击放大：预览区也保持 4:3 */
.lesson-img-lightbox-img {
  aspect-ratio: 4 / 3;
  width: min(96vw, calc(92vh * 4 / 3));
  height: auto !important;
  max-width: min(96vw, 1200px);
  max-height: 92vh;
  object-fit: contain;
}