diff --git a/src/features/subject-images/SubjectImagesPage.vue b/src/features/subject-images/SubjectImagesPage.vue
index 46f3792..79365b6 100644
--- a/src/features/subject-images/SubjectImagesPage.vue
+++ b/src/features/subject-images/SubjectImagesPage.vue
@@ -809,6 +809,10 @@ const rules = { concurrency: integerRule('批量并发'), limit: integerRule('
 .form-image-card {
     @apply overflow-hidden;
 }
+/* 浅色卡片使用轻灰底，与白色画布区分；网格和瀑布流共用，深色保持原有层次。 */
+:root:not([data-theme='dark']) .form-image-card {
+    background: var(--app-subtle);
+}
 .gallery-workspace-page .workspace-scroll-content {
     @apply pt-2;
 }