diff --git a/themes/fukasawa/components/TopNav.js b/themes/fukasawa/components/TopNav.js
index 7653c8da..8c5e620a 100644
--- a/themes/fukasawa/components/TopNav.js
+++ b/themes/fukasawa/components/TopNav.js
@@ -19,7 +19,7 @@ const TopNav = props => {
   return (<div id='top-nav' className='z-40 block lg:hidden'>
 
     {/* 导航栏 */}
-    <div id='sticky-nav' className={'lg:relative w-full top-0 z-20 transform duration-500 bg-white dark:bg-black'}>
+    <div id='sticky-nav' className={'relative w-full top-0 z-20 transform duration-500 bg-white dark:bg-black'}>
       <Collapse type='vertical' isOpen={isOpen}>
         <div className='py-1 px-5'>
           <GroupMenu {...props} />