diff --git a/frontend/src/app/pages/LoginPage.tsx b/frontend/src/app/pages/LoginPage.tsx
index 19528b3..6f748d4 100644
--- a/frontend/src/app/pages/LoginPage.tsx
+++ b/frontend/src/app/pages/LoginPage.tsx
@@ -1,76 +1,91 @@
-import { useEffect, useState } from "react";
-import { useNavigate } from "react-router";
-import { motion } from "motion/react";
-import { Heart } from "lucide-react";
-import { useUser } from "../context/UserContext";
-import { devLogin, fetchApi } from "../services/api";
-import { debugLog, clearDebugLogs } from "../services/debug";
-
-export function LoginPage() {
-  const navigate = useNavigate();
-  const { setTokenAndUser, fetchProfile } = useUser();
-  const [error, setError] = useState("");
-
-  useEffect(() => {
-    clearDebugLogs();
-
-    const params = new URLSearchParams(window.location.search);
-    debugLog(`URL: ${window.location.href.substring(0, 100)}`);
-    debugLog(`search: ${window.location.search}`);
-
-    const openidParam = params.get('openid');
-    if (openidParam && openidParam.trim()) {
-      debugLog(`openid: ${openidParam}`);
-      fetchApi("/auth/openid-login", {
-        method: "POST",
-        body: JSON.stringify({ openid: openidParam }),
-      }).then((res: any) => {
-        debugLog(`openid-login OK: id=${res.user_id}, phone=${res.mobile}`);
-        setTokenAndUser(res.token, { id: res.user_id, openid: res.openid, phone: res.mobile });
-        fetchProfile().then((dto) => {
-          if (dto) debugLog(`fetchProfile: name=${dto.name}, phone=${dto.phone}, onboarded=${dto.is_onboarded}`);
-          navigate(dto?.is_onboarded ? "/home" : "/onboarding", { replace: true });
-        }).catch((e: any) => {
-          debugLog(`fetchProfile error: ${e?.message}`);
-          setError("登录已失效，请在小程序重新进入");
-        });
-      }).catch((e: any) => {
-        debugLog(`openid-login error: ${e?.message}`);
-        setError("登录失败: " + (e?.message || ""));
-      });
-      return;
-    }
-
-    debugLog(`no openid param (val=${openidParam || '(empty)'}), fallback to dev-login`);
-    devLogin().then((res) => {
-      debugLog(`dev-login: openid=${res.openid}, phone=${res.mobile}`);
-      setTokenAndUser(res.token, { id: res.user_id, openid: res.openid, phone: res.mobile });
-      fetchProfile().then((dto) => {
-        if (dto) debugLog(`fetchProfile: name=${dto.name}, phone=${dto.phone}`);
-        navigate(dto?.is_onboarded ? "/home" : "/onboarding", { replace: true });
-      });
-    }).catch((err) => {
-      debugLog(`dev-login error: ${err?.message}`);
-      setError(err?.message || "登录失败，请刷新重试");
-    });
-  }, []); // eslint-disable-line react-hooks/exhaustive-deps
-
-  return (
-    <div className="min-h-dvh bg-morandi-50 flex items-center justify-center p-4">
-      <div className="text-center">
-        <motion.div
-          animate={{ rotate: 360 }}
-          transition={{ repeat: Infinity, duration: 1.5, ease: "linear" }}
-          className="inline-flex items-center justify-center w-16 h-16 bg-gradient-to-br from-morandi-300 to-morandi-400 rounded-full mb-4"
-        >
-          <Heart className="w-8 h-8 text-white fill-white" />
-        </motion.div>
-        {error ? (
-          <p className="text-sm text-red-500">{error}</p>
-        ) : (
-          <p className="text-sm text-gray-500">加载中...</p>
-        )}
-      </div>
-    </div>
-  );
-}
+import { useEffect, useState } from "react";
+import { useNavigate } from "react-router";
+import { motion } from "motion/react";
+import { Heart } from "lucide-react";
+import { useUser } from "../context/UserContext";
+import { devLogin, fetchApi, getToken, clearToken, decodeToken } from "../services/api";
+import { debugLog, clearDebugLogs } from "../services/debug";
+
+export function LoginPage() {
+  const navigate = useNavigate();
+  const { setTokenAndUser, fetchProfile } = useUser();
+  const [error, setError] = useState("");
+
+  useEffect(() => {
+    clearDebugLogs();
+
+    // 身份一致性检查：URL 中的 openid 与缓存 token 不一致时清除缓存
+    const urlOpenid = new URLSearchParams(window.location.search).get('openid');
+    const cachedToken = getToken();
+    if (urlOpenid && cachedToken) {
+      try {
+        const payload = decodeToken(cachedToken);
+        if (payload.openid !== urlOpenid) {
+          debugLog(`[auth] openid 不一致: URL=${urlOpenid}, cache=${payload.openid}，清除缓存`);
+          clearToken();
+        }
+      } catch (e) {
+        debugLog(`[auth] token 解码失败: ${e}`);
+      }
+    }
+
+    const params = new URLSearchParams(window.location.search);
+    debugLog(`URL: ${window.location.href.substring(0, 100)}`);
+    debugLog(`search: ${window.location.search}`);
+
+    const openidParam = params.get('openid');
+    if (openidParam && openidParam.trim()) {
+      debugLog(`openid: ${openidParam}`);
+      fetchApi("/auth/openid-login", {
+        method: "POST",
+        body: JSON.stringify({ openid: openidParam }),
+      }).then((res: any) => {
+        debugLog(`openid-login OK: id=${res.user_id}, phone=${res.mobile}`);
+        setTokenAndUser(res.token, { id: res.user_id, openid: res.openid, phone: res.mobile });
+        fetchProfile().then((dto) => {
+          if (dto) debugLog(`fetchProfile: name=${dto.name}, phone=${dto.phone}, onboarded=${dto.is_onboarded}`);
+          navigate(dto?.is_onboarded ? "/home" : "/onboarding", { replace: true });
+        }).catch((e: any) => {
+          debugLog(`fetchProfile error: ${e?.message}`);
+          setError("登录已失效，请在小程序重新进入");
+        });
+      }).catch((e: any) => {
+        debugLog(`openid-login error: ${e?.message}`);
+        setError("登录失败: " + (e?.message || ""));
+      });
+      return;
+    }
+
+    debugLog(`no openid param (val=${openidParam || '(empty)'}), fallback to dev-login`);
+    devLogin().then((res) => {
+      debugLog(`dev-login: openid=${res.openid}, phone=${res.mobile}`);
+      setTokenAndUser(res.token, { id: res.user_id, openid: res.openid, phone: res.mobile });
+      fetchProfile().then((dto) => {
+        if (dto) debugLog(`fetchProfile: name=${dto.name}, phone=${dto.phone}`);
+        navigate(dto?.is_onboarded ? "/home" : "/onboarding", { replace: true });
+      });
+    }).catch((err) => {
+      debugLog(`dev-login error: ${err?.message}`);
+      setError(err?.message || "登录失败，请刷新重试");
+    });
+  }, []); // eslint-disable-line react-hooks/exhaustive-deps
+
+  return (
+    <div className="min-h-dvh bg-morandi-50 flex items-center justify-center p-4">
+      <div className="text-center">
+        <motion.div
+          animate={{ rotate: 360 }}
+          transition={{ repeat: Infinity, duration: 1.5, ease: "linear" }}
+          className="inline-flex items-center justify-center w-16 h-16 bg-gradient-to-br from-morandi-300 to-morandi-400 rounded-full mb-4"
+        >
+          <Heart className="w-8 h-8 text-white fill-white" />
+        </motion.div>
+        {error ? (
+          <p className="text-sm text-red-500">{error}</p>
+        ) : (
+          <p className="text-sm text-gray-500">加载中...</p>
+        )}
+      </div>
+    </div>
+  );
+}