diff --git a/src/services/authService.ts b/src/services/authService.ts
index 61d44a3..a6d3c91 100644
--- a/src/services/authService.ts
+++ b/src/services/authService.ts
@@ -134,7 +134,13 @@ export function logout(): void {
  * Validates: Requirements 13.1
  */
 export function getGitHubLoginUrl(state?: string): string {
-  const baseUrl = import.meta.env.VITE_API_BASE_URL || 'http://localhost:2612/api/v1';
+  // 强制修正：如果不是本地开发环境，必须使用相对路径
+  const isLocal = window.location.hostname === 'localhost' || window.location.hostname === '127.0.0.1';
+  const baseUrl = isLocal
+    ? (import.meta.env.VITE_API_BASE_URL || 'http://localhost:2612/api/v1')
+    : '/api/v1';
+
+  console.log('[Auth] Generating GitHub URL with base:', baseUrl);
   const url = new URL(`${baseUrl}/auth/github`);
   if (state) {
     url.searchParams.append('state', state);