diff --git a/frontend/mobile-app/lib/features/auth/presentation/pages/guide_page.dart b/frontend/mobile-app/lib/features/auth/presentation/pages/guide_page.dart
index b31a555a..c39d4bb6 100644
--- a/frontend/mobile-app/lib/features/auth/presentation/pages/guide_page.dart
+++ b/frontend/mobile-app/lib/features/auth/presentation/pages/guide_page.dart
@@ -348,13 +348,15 @@ class _WelcomePageContentState extends ConsumerState<_WelcomePageContent> {
     // 调用API验证推荐码是否有效
     try {
       final accountService = ref.read(accountServiceProvider);
-      final isValid = await accountService.verifyReferralCode(inviterCode);
+      final result = await accountService.verifyReferralCode(inviterCode);
 
+      final isValid = result['valid'] as bool? ?? false;
       if (!isValid) {
         if (!mounted) return;
+        final message = result['message'] as String? ?? '推荐码不存在或已失效';
         ScaffoldMessenger.of(context).showSnackBar(
-          const SnackBar(
-            content: Text('推荐码不存在或已失效'),
+          SnackBar(
+            content: Text(message),
             backgroundColor: Colors.redAccent,
           ),
         );