diff --git a/src/store/index.js b/src/store/index.js
index 07f99bd3..cbdaebb6 100644
--- a/src/store/index.js
+++ b/src/store/index.js
@@ -6,6 +6,7 @@ import industryReducer from './slices/industrySlice';
 import stockReducer from './slices/stockSlice';
 import authModalReducer from './slices/authModalSlice';
 import subscriptionReducer from './slices/subscriptionSlice';
+import deviceReducer from './slices/deviceSlice'; // ✅ 设备检测状态管理
 import posthogMiddleware from './middleware/posthogMiddleware';
 import { eventsApi } from './api/eventsApi'; // ✅ RTK Query API
 
@@ -17,6 +18,7 @@ export const store = configureStore({
     stock: stockReducer, // ✅ 股票和事件数据管理
     authModal: authModalReducer, // ✅ 认证弹窗状态管理
     subscription: subscriptionReducer, // ✅ 订阅信息状态管理
+    device: deviceReducer, // ✅ 设备检测状态管理（移动端/桌面端）
     [eventsApi.reducerPath]: eventsApi.reducer, // ✅ RTK Query 事件 API
   },
   middleware: (getDefaultMiddleware) =>
diff --git a/src/store/slices/deviceSlice.js b/src/store/slices/deviceSlice.js
new file mode 100644
index 00000000..f92406da
--- /dev/null
+++ b/src/store/slices/deviceSlice.js
@@ -0,0 +1,52 @@
+// src/store/slices/deviceSlice.js
+import { createSlice } from '@reduxjs/toolkit';
+
+/**
+ * 检测当前设备是否为移动设备
+ *
+ * 判断逻辑：
+ * 1. User Agent 检测（移动设备标识）
+ * 2. 屏幕宽度检测（<= 768px）
+ * 3. 触摸屏检测（支持触摸事件）
+ *
+ * @returns {boolean} true 表示移动设备，false 表示桌面设备
+ */
+const detectIsMobile = () => {
+  const userAgent = navigator.userAgent || navigator.vendor || window.opera;
+  const mobileRegex = /Android|webOS|iPhone|iPad|iPod|BlackBerry|IEMobile|Opera Mini/i;
+  const isMobileUA = mobileRegex.test(userAgent);
+  const isMobileWidth = window.innerWidth <= 768;
+  const hasTouchScreen = 'ontouchstart' in window || navigator.maxTouchPoints > 0;
+
+  return isMobileUA || (isMobileWidth && hasTouchScreen);
+};
+
+const initialState = {
+  isMobile: detectIsMobile(),
+};
+
+const deviceSlice = createSlice({
+  name: 'device',
+  initialState,
+  reducers: {
+    /**
+     * 更新屏幕尺寸状态
+     *
+     * 使用场景：
+     * - 监听 window resize 事件时调用
+     * - 屏幕方向变化时调用（orientationchange）
+     */
+    updateScreenSize: (state) => {
+      state.isMobile = detectIsMobile();
+    },
+  },
+});
+
+// Actions
+export const { updateScreenSize } = deviceSlice.actions;
+
+// Selectors
+export const selectIsMobile = (state) => state.device.isMobile;
+
+// Reducer
+export default deviceSlice.reducer;