diff --git a/frontend/mobile-app/lib/features/auth/presentation/pages/splash_page.dart b/frontend/mobile-app/lib/features/auth/presentation/pages/splash_page.dart
index 4d183456..265590d8 100644
--- a/frontend/mobile-app/lib/features/auth/presentation/pages/splash_page.dart
+++ b/frontend/mobile-app/lib/features/auth/presentation/pages/splash_page.dart
@@ -298,7 +298,7 @@ class _SplashPageState extends ConsumerState<SplashPage> {
     return SizedBox.expand(
       child: Image.asset(
         'assets/images/splash_static/splash_$_staticImageIndex.jpg',
-        fit: BoxFit.cover,
+        fit: BoxFit.contain, // 不拉伸，保持原比例，黑边填充
       ),
     );
   }