diff --git a/src/App.js b/src/App.js
index 6b09fd81..dfa9f1f8 100755
--- a/src/App.js
+++ b/src/App.js
@@ -28,6 +28,7 @@ import { useGlobalErrorHandler } from './hooks/useGlobalErrorHandler';
 
 // Redux
 import { initializePostHog } from './store/slices/posthogSlice';
+import { updateScreenSize } from './store/slices/deviceSlice';
 
 // Utils
 import { logger } from './utils/logger';
@@ -63,6 +64,27 @@ function AppContent() {
         performanceMonitor.mark('react-ready');
     }, []);
 
+    // 📱 设备检测：监听窗口尺寸变化
+    useEffect(() => {
+        let resizeTimer;
+        const handleResize = () => {
+            // 防抖：避免频繁触发
+            clearTimeout(resizeTimer);
+            resizeTimer = setTimeout(() => {
+                dispatch(updateScreenSize());
+            }, 150);
+        };
+
+        window.addEventListener('resize', handleResize);
+        window.addEventListener('orientationchange', handleResize);
+
+        return () => {
+            clearTimeout(resizeTimer);
+            window.removeEventListener('resize', handleResize);
+            window.removeEventListener('orientationchange', handleResize);
+        };
+    }, [dispatch]);
+
     // ✅ 首次访问追踪
     useEffect(() => {
         const hasVisited = localStorage.getItem('has_visited');
diff --git a/src/hooks/useDevice.js b/src/hooks/useDevice.js
new file mode 100644
index 00000000..dce853c0
--- /dev/null
+++ b/src/hooks/useDevice.js
@@ -0,0 +1,35 @@
+/**
+ * useDevice Hook
+ *
+ * 封装设备类型检测，提供简洁的 API 供组件使用
+ *
+ * @example
+ * const { isMobile, isTablet, isDesktop, deviceType } = useDevice();
+ *
+ * if (isMobile) return <MobileView />;
+ * if (isTablet) return <TabletView />;
+ * return <DesktopView />;
+ */
+import { useSelector } from 'react-redux';
+import {
+  selectIsMobile,
+  selectIsTablet,
+  selectIsDesktop,
+  selectDeviceType,
+} from '@/store/slices/deviceSlice';
+
+export const useDevice = () => {
+  const isMobile = useSelector(selectIsMobile);
+  const isTablet = useSelector(selectIsTablet);
+  const isDesktop = useSelector(selectIsDesktop);
+  const deviceType = useSelector(selectDeviceType);
+
+  return {
+    isMobile,
+    isTablet,
+    isDesktop,
+    deviceType,
+  };
+};
+
+export default useDevice;