diff --git a/frontend/mobile-app/lib/features/auth/presentation/pages/import_mnemonic_page.dart b/frontend/mobile-app/lib/features/auth/presentation/pages/import_mnemonic_page.dart
index f3bb1afd..77d28a48 100644
--- a/frontend/mobile-app/lib/features/auth/presentation/pages/import_mnemonic_page.dart
+++ b/frontend/mobile-app/lib/features/auth/presentation/pages/import_mnemonic_page.dart
@@ -332,9 +332,15 @@ class _ImportMnemonicPageState extends ConsumerState<ImportMnemonicPage> {
               fontFamily: 'Inter',
               color: Color(0xFF5D4037),
             ),
+            cursorColor: const Color(0xFF8B5A2B),
             decoration: const InputDecoration(
               border: InputBorder.none,
+              enabledBorder: InputBorder.none,
+              focusedBorder: InputBorder.none,
+              errorBorder: InputBorder.none,
+              disabledBorder: InputBorder.none,
               contentPadding: EdgeInsets.symmetric(horizontal: 16, vertical: 12),
+              filled: false,
               hintText: '请输入账户序列号',
               hintStyle: TextStyle(
                 fontSize: 16,