diff --git a/app/src/main/java/com/huanchengfly/tieba/post/MainActivityV2.kt b/app/src/main/java/com/huanchengfly/tieba/post/MainActivityV2.kt
index 731b245d..d6fbebd9 100644
--- a/app/src/main/java/com/huanchengfly/tieba/post/MainActivityV2.kt
+++ b/app/src/main/java/com/huanchengfly/tieba/post/MainActivityV2.kt
@@ -352,7 +352,8 @@ class MainActivityV2 : BaseComposeActivity() {
                     ) {
                         ModalBottomSheetLayout(
                             bottomSheetNavigator = bottomSheetNavigator,
-                            sheetShape = RoundedCornerShape(topStart = 12.dp, topEnd = 12.dp)
+                            sheetShape = RoundedCornerShape(topStart = 12.dp, topEnd = 12.dp),
+                            sheetBackgroundColor = ExtendedTheme.colors.windowBackground,
                         ) {
                             DestinationsNavHost(
                                 navController = navController,
diff --git a/app/src/main/java/com/huanchengfly/tieba/post/ui/page/thread/ThreadPage.kt b/app/src/main/java/com/huanchengfly/tieba/post/ui/page/thread/ThreadPage.kt
index 590ff3a4..79e35418 100644
--- a/app/src/main/java/com/huanchengfly/tieba/post/ui/page/thread/ThreadPage.kt
+++ b/app/src/main/java/com/huanchengfly/tieba/post/ui/page/thread/ThreadPage.kt
@@ -758,7 +758,7 @@ fun ThreadPage(
                 ModalBottomSheetLayout(
                     sheetState = bottomSheetState,
                     sheetShape = RoundedCornerShape(topStart = 12.dp, topEnd = 12.dp),
-                    sheetBackgroundColor = ExtendedTheme.colors.background,
+                    sheetBackgroundColor = ExtendedTheme.colors.windowBackground,
                     sheetContent = {
                         ThreadMenu(
                             isSeeLz = isSeeLz,