diff --git a/databi/src/api.js b/databi/src/api.js
index 54cedd2..27f142b 100644
--- a/databi/src/api.js
+++ b/databi/src/api.js
@@ -31,6 +31,10 @@ export async function fetchStatisticsOverview({ appCode, countryId, endMs, start
     headers: requestHeaders(appCode)
   });
   const payload = await readJSON(response);
+  if (isAuthExpired(response, payload)) {
+    redirectToLogin();
+    throw new Error(payload.message || "访问凭证已失效");
+  }
   if (!response.ok || payload.code !== 0) {
     throw new Error(payload.message || response.statusText || "请求失败");
   }
@@ -62,6 +66,17 @@ async function readJSON(response) {
   }
 }
 
+function isAuthExpired(response, payload) {
+  return response.status === 401 || Number(payload?.code) === 40100;
+}
+
+function redirectToLogin() {
+  window.localStorage.removeItem(TOKEN_KEY);
+  if (window.location.pathname !== "/login") {
+    window.location.replace("/login");
+  }
+}
+
 function normalizeAppCode(value) {
   return String(value || "").trim().toLowerCase();
 }