diff --git a/src/components/Auth/AuthFormContent.js b/src/components/Auth/AuthFormContent.js
index 6e808ddf..04b78057 100644
--- a/src/components/Auth/AuthFormContent.js
+++ b/src/components/Auth/AuthFormContent.js
@@ -356,24 +356,22 @@ export default function AuthFormContent() {
                 // 更新session
                 await checkSession();
 
+                // ✅ 兼容后端两种命名格式：camelCase (isNewUser) 和 snake_case (is_new_user)
+                const isNewUser = data.isNewUser ?? data.is_new_user ?? false;
+
                 // 追踪登录成功并识别用户
-                authEvents.trackLoginSuccess(data.user, 'phone', data.isNewUser);
+                authEvents.trackLoginSuccess(data.user, 'phone', isNewUser);
 
                 // ✅ 保留登录成功 toast（关键操作提示）
                 toast({
-                    title: data.isNewUser ? '注册成功' : '登录成功',
+                    title: isNewUser ? '注册成功' : '登录成功',
                     description: config.successDescription,
                     status: "success",
                     duration: 2000,
                 });
 
-                logger.info('AuthFormContent', '登录成功', {
-                    isNewUser: data.isNewUser,
-                    userId: data.user?.id
-                });
-
                 // 检查是否为新注册用户
-                if (data.isNewUser) {
+                if (isNewUser) {
                     // 新注册用户，延迟后显示昵称设置引导
                     setTimeout(() => {
                         setCurrentPhone(phone);