diff --git a/frontend/src/app/pages/LoginPage.tsx b/frontend/src/app/pages/LoginPage.tsx
index 3366ada..535fbb4 100644
--- a/frontend/src/app/pages/LoginPage.tsx
+++ b/frontend/src/app/pages/LoginPage.tsx
@@ -11,51 +11,135 @@ function isWechatMiniProgram(): boolean {
   return ua.includes("micromessenger") && ua.includes("miniprogram");
 }
 
+// ─── 🐞 调试区域：排查后删除 ───
+
+interface DebugInfo {
+  url: string;
+  ua: string;
+  isWxMp: boolean;
+  hasTokenParam: boolean;
+  tokenPrefix: string;
+  decodeResult: string;
+  fetchError: string;
+  devLoginError: string;
+  step: string;
+  tokenInStorage: boolean;
+}
+
+const INIT_DEBUG: DebugInfo = {
+  url: "", ua: "", isWxMp: false, hasTokenParam: false,
+  tokenPrefix: "", decodeResult: "", fetchError: "",
+  devLoginError: "", step: "init", tokenInStorage: false,
+};
+
+function DebugPanel({ info }: { info: DebugInfo }) {
+  return (
+    <div className="absolute top-0 left-0 right-0 z-50 bg-black/80 text-white text-xs font-mono p-3 text-left max-h-[60vh] overflow-auto">
+      <div className="font-bold text-yellow-400 mb-1">🐞 调试信息 (关闭需去掉 ?debug=1)</div>
+      <table className="w-full">
+        <tbody>
+          {Object.entries(info).map(([k, v]) => (
+            <tr key={k} className="border-b border-white/10">
+              <td className="pr-2 text-gray-400 w-28 align-top whitespace-nowrap">{k}</td>
+              <td className="break-all text-green-300">{v || <span className="text-gray-500">(空)</span>}</td>
+            </tr>
+          ))}
+        </tbody>
+      </table>
+    </div>
+  );
+}
+
+// ─── 🐞 调试区域结束 ───
+
 export function LoginPage() {
   const navigate = useNavigate();
   const { setTokenAndUser, fetchProfile } = useUser();
   const [error, setError] = useState("");
+  const [debug] = useState<DebugInfo>(() => ({ ...INIT_DEBUG }));
+
+  // ─── 🐞 调试更新函数 ───
+  const dbg = (patch: Partial<DebugInfo>) => {
+    if (debug) Object.assign(debug, patch);
+  };
+  // ─── 🐞 调试更新结束 ───
 
   useEffect(() => {
+    // ─── 🐞 ───
+    if (debug) {
+      debug.url = window.location.href;
+      debug.ua = navigator.userAgent;
+      debug.tokenInStorage = !!getToken();
+    }
+    // ─── 🐞 结束 ───
+
     // 优先使用 URL 中的 token（小程序传参）
     const params = new URLSearchParams(window.location.search);
     const tokenFromUrl = params.get('token');
 
+    // ─── 🐞 ───
+    dbg({ step: "check-url-token", hasTokenParam: !!tokenFromUrl, tokenPrefix: tokenFromUrl ? tokenFromUrl.substring(0, 30) + "..." : "" });
+    // ─── 🐞 ───
+
     if (tokenFromUrl) {
       // token 变了就更新存储
       const oldToken = getToken();
       if (tokenFromUrl !== oldToken) {
-        const payload = decodeToken(tokenFromUrl);
-        setTokenAndUser(tokenFromUrl, {
-          id: String(payload.uid),
-          openid: payload.openid,
-          phone: payload.phone,
-        });
+        try {
+          const payload = decodeToken(tokenFromUrl);
+          // ─── 🐞 ───
+          dbg({ step: "decode-ok", decodeResult: `uid=${payload.uid}, openid=${payload.openid?.substring(0,15)}..., phone=${payload.phone}` });
+          // ─── 🐞 ───
+          setTokenAndUser(tokenFromUrl, {
+            id: String(payload.uid),
+            openid: payload.openid,
+            phone: payload.phone,
+          });
+        } catch (e: any) {
+          // ─── 🐞 ───
+          dbg({ step: "decode-fail", decodeResult: `解析失败: ${e?.message || e}` });
+          // ─── 🐞 ───
+          setError("Token 解析失败: " + (e?.message || "格式错误"));
+          return;
+        }
       } else {
         // token 没变，确保 localStorage 有数据
         saveToken(tokenFromUrl);
       }
 
-      // 拉取孕期数据，进入首页或 onboarding
+      // 拉取用户数据，进入首页或 onboarding
+      dbg({ step: "fetch-profile" });
       fetchProfile().then((dto) => {
+        // ─── 🐞 ───
+        dbg({ step: "fetch-ok", fetchError: `is_onboarded=${dto?.is_onboarded}` });
+        // ─── 🐞 ───
         navigate(dto?.is_onboarded ? "/home" : "/onboarding", { replace: true });
-      }).catch(() => {
+      }).catch((e: any) => {
+        // ─── 🐞 ───
+        dbg({ step: "fetch-fail", fetchError: `${e?.message || e}` });
+        // ─── 🐞 ───
         setError("登录已失效，请在小程序重新进入");
       });
       return;
     }
 
     // 小程序环境但没有 token → 通知小程序传递
+    dbg({ step: "check-wx-mp", isWxMp: isWechatMiniProgram() });
     if (isWechatMiniProgram()) {
       try {
         (window as any).wx?.miniProgram?.postMessage({ type: "NEED_TOKEN" });
-      } catch { /* ignore */ }
+        dbg({ step: "wx-postMessage-done" });
+      } catch (e: any) {
+        dbg({ step: "wx-postMessage-error", fetchError: `${e?.message || e}` });
+      }
       setError("正在获取登录信息...");
       return;
     }
 
     // 浏览器开发环境 → 自动使用测试账号
+    dbg({ step: "dev-login" });
     devLogin().then((res) => {
+      dbg({ step: "dev-login-ok" });
       setTokenAndUser(res.token, {
         id: res.user_id,
         openid: res.openid,
@@ -65,12 +149,14 @@ export function LoginPage() {
         navigate(dto?.is_onboarded ? "/home" : "/onboarding", { replace: true });
       });
     }).catch((err) => {
+      dbg({ step: "dev-login-fail", devLoginError: err?.message || String(err) });
       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="min-h-dvh bg-morandi-50 flex items-center justify-center p-4 relative">
+      {debug && <DebugPanel info={debug} />}
       <div className="text-center">
         <motion.div
           animate={{ rotate: 360 }}