diff --git a/src/renderer/src/pages/home/Tabs/index.tsx b/src/renderer/src/pages/home/Tabs/index.tsx
index d72a38c6..6811fae2 100644
--- a/src/renderer/src/pages/home/Tabs/index.tsx
+++ b/src/renderer/src/pages/home/Tabs/index.tsx
@@ -150,6 +150,7 @@ const Container = styled.div`
   max-width: var(--assistants-width);
   min-width: var(--assistants-width);
   height: calc(100vh - var(--navbar-height));
+  background-color: var(--color-background);
   overflow: hidden;
   .collapsed {
     width: 0;
diff --git a/src/renderer/src/store/settings.ts b/src/renderer/src/store/settings.ts
index 25e6cc56..dda80ec5 100644
--- a/src/renderer/src/store/settings.ts
+++ b/src/renderer/src/store/settings.ts
@@ -44,7 +44,7 @@ const initialState: SettingsState = {
   theme: ThemeMode.auto,
   windowStyle: 'transparent',
   fontSize: 14,
-  topicPosition: 'right',
+  topicPosition: 'left',
   showTopicTime: false,
   pasteLongTextAsFile: false,
   clickAssistantToShowTopic: false,