diff --git a/client/src/components/Layout.tsx b/client/src/components/Layout.tsx
index 7dbd58c..deb863e 100644
--- a/client/src/components/Layout.tsx
+++ b/client/src/components/Layout.tsx
@@ -86,7 +86,7 @@ export function Layout({ children, user, onLogout }: LayoutProps) {
         <div className="flex h-14 items-center border-b px-4">
           <span className="text-lg font-bold">态势感知系统</span>
         </div>
-        <nav className="space-y-4 p-3">
+        <nav className="space-y-4 overflow-y-auto p-3" style={{ maxHeight: 'calc(100vh - 3.5rem - 5rem)' }}>
           {visibleGroups.map((group) => (
             <div key={group.title}>
               <p className="mb-1 px-3 text-xs font-medium text-muted-foreground">{group.title}</p>