diff --git a/src/timelines/TootBottomSheet.tsx b/src/timelines/TootBottomSheet.tsx
index 8b8ecb7..9a65bd8 100644
--- a/src/timelines/TootBottomSheet.tsx
+++ b/src/timelines/TootBottomSheet.tsx
@@ -164,6 +164,7 @@ const TootBottomSheet: Component = (props) => {
     .bottom-dock {
       position: sticky;
       bottom: 0;
+      z-index: var(--tutu-zidx-nav);
     }
 
     .name :global(img) {