diff --git a/src/api/wechat/index.ts b/src/api/wechat/index.ts
index 9c058ad..c8fdf88 100644
--- a/src/api/wechat/index.ts
+++ b/src/api/wechat/index.ts
@@ -48,7 +48,10 @@ export async function getFollowQrcode(): Promise<WxFollowQrcodeResult> {
 
 /** H5 网页授权：从其他配置 wechat_mp 读取 AppId / OAuth 回调根 */
 export async function getWeChatOAuthConfig(): Promise<WxOAuthConfigResult> {
-  const res = await axiosInstance.get(omsUrl('/wechat/mp/oauth-config'));
+  // 不带默认 Content-Type，避免无必要的 CORS 预检（OPTIONS 易被网关/路由判 405）
+  const res = await axiosInstance.get(omsUrl('/wechat/oauth/config'), {
+    headers: { 'Content-Type': undefined as unknown as string },
+  });
   const data = unwrapOrSelf<WxOAuthConfigResult & Record<string, unknown>>(res.data);
   const appId = String(data.appId ?? data.AppId ?? '').trim();
   const oauthRedirectBase = String(