diff --git a/banban-mini/src/pages/login/index.tsx b/banban-mini/src/pages/login/index.tsx
index 46aba92..c2214e6 100644
--- a/banban-mini/src/pages/login/index.tsx
+++ b/banban-mini/src/pages/login/index.tsx
@@ -5,19 +5,46 @@ import Taro from '@tarojs/taro'
 import { getToken, wechatLogin } from '@/services/auth'
 import './index.scss'
 
+const LOGIN_PAGE_URL = '/pages/login/index'
+const DEFAULT_POST_LOGIN_URL = '/pages/device/index'
+const TAB_BAR_ROUTES = new Set([
+  '/pages/device/index',
+  '/pages/chat/index',
+  '/pages/location/index',
+  '/pages/sleep/index',
+])
+
+function consumePostLoginRedirect(): string {
+  const storedUrl = String(Taro.getStorageSync('postLoginRedirect') || '').trim()
+  Taro.removeStorageSync('postLoginRedirect')
+
+  if (!storedUrl || storedUrl === LOGIN_PAGE_URL || !storedUrl.startsWith('/pages/')) {
+    return DEFAULT_POST_LOGIN_URL
+  }
+
+  return storedUrl
+}
+
+function navigateAfterLogin(url: string): void {
+  const route = url.split('?')[0]
+  if (!TAB_BAR_ROUTES.has(route)) {
+    Taro.reLaunch({ url })
+    return
+  }
+
+  // Tab pages must be opened with switchTab so their lifecycle and custom tab bar refresh.
+  void Promise.resolve(Taro.switchTab({ url: route })).catch(() => {
+    Taro.reLaunch({ url: route })
+  })
+}
+
 export default function Login() {
   const [submitting, setSubmitting] = useState(false)
   const [agreementAccepted, setAgreementAccepted] = useState(false)
 
   useEffect(() => {
     if (getToken()) {
-      const redirectUrl = String(Taro.getStorageSync('postLoginRedirect') || '').trim()
-      if (redirectUrl) {
-        Taro.removeStorageSync('postLoginRedirect')
-        Taro.reLaunch({ url: redirectUrl })
-        return
-      }
-      Taro.reLaunch({ url: '/pages/device/index' })
+      navigateAfterLogin(consumePostLoginRedirect())
       return
     }
 
@@ -60,13 +87,7 @@ export default function Login() {
 
       Taro.showToast({ title: '登录成功', icon: 'success' })
       setTimeout(() => {
-        const redirectUrl = String(Taro.getStorageSync('postLoginRedirect') || '').trim()
-        if (redirectUrl) {
-          Taro.removeStorageSync('postLoginRedirect')
-          Taro.reLaunch({ url: redirectUrl })
-          return
-        }
-        Taro.reLaunch({ url: '/pages/device/index' })
+        navigateAfterLogin(consumePostLoginRedirect())
       }, 300)
     } catch (error: any) {
       console.error('[login] failed:', error)