diff --git a/apps/web/src/components/layout/main/useNavItem.tsx b/apps/web/src/components/layout/main/useNavItem.tsx
index 478bd58..fbe4a0d 100644
--- a/apps/web/src/components/layout/main/useNavItem.tsx
+++ b/apps/web/src/components/layout/main/useNavItem.tsx
@@ -17,6 +17,7 @@ import {
 } from "@ant-design/icons";
 import { useAuth } from "@web/src/providers/auth-provider";
 import { env } from "@web/src/env";
+import { useUserAgent } from "@web/src/hooks/useUserAgent";
 
 export interface NavItem {
 	to: string;
@@ -31,7 +32,7 @@ export function useNavItem() {
 			taxonomy: { slug: TaxonomySlug.CATEGORY },
 		},
 	});
-
+	const { previewMode } = useUserAgent();
 	const navItems = useMemo(() => {
 		// 定义固定的导航项
 		const staticItems = {
@@ -67,7 +68,7 @@ export function useNavItem() {
 			staticItems.letterList,
 			staticItems.editor,
 			staticItems.letterProgress,
-			staticItems.inbox,
+			!previewMode && staticItems.inbox,
 			staticItems.help,
 		].filter(Boolean);
 	}, [data, user]);