diff --git a/frontend_nuxt/utils/screen.js b/frontend_nuxt/utils/screen.js
index 3d3aebc03..a32e999aa 100644
--- a/frontend_nuxt/utils/screen.js
+++ b/frontend_nuxt/utils/screen.js
@@ -3,6 +3,20 @@ import { ref, computed } from 'vue'
 const width = ref(0)
 const isClient = ref(false)
 
+// 检测移动设备的用户代理字符串
+const isMobileUserAgent = () => {
+  if (typeof navigator === 'undefined') return false
+  
+  const userAgent = navigator.userAgent.toLowerCase()
+  const mobileKeywords = [
+    'android', 'iphone', 'ipad', 'ipod', 'blackberry', 'windows phone',
+    'mobile', 'tablet', 'opera mini', 'iemobile'
+  ]
+  
+  return mobileKeywords.some(keyword => userAgent.includes(keyword))
+}
+
+// 客户端初始化
 if (typeof window !== 'undefined') {
   isClient.value = true
   width.value = window.innerWidth
@@ -11,4 +25,13 @@ if (typeof window !== 'undefined') {
   })
 }
 
-export const isMobile = computed(() => isClient.value && width.value <= 768)
+// 服务端和客户端的移动设备检测
+export const isMobile = computed(() => {
+  if (isClient.value) {
+    // 客户端：优先使用窗口宽度，如果窗口宽度不可用则使用用户代理
+    return width.value > 0 ? width.value <= 768 : isMobileUserAgent()
+  } else {
+    // 服务端：使用用户代理字符串
+    return isMobileUserAgent()
+  }
+})