diff --git a/lib/app/bindings/initial_binding.dart b/lib/app/bindings/initial_binding.dart
index 0dc0d74..620ccce 100644
--- a/lib/app/bindings/initial_binding.dart
+++ b/lib/app/bindings/initial_binding.dart
@@ -2,6 +2,7 @@ import 'package:get/get.dart';
 import 'package:dio/dio.dart';
 import 'package:flutter/foundation.dart'; // 导入 debugPrint
 import 'package:get_storage/get_storage.dart';
+import 'package:problem_check_system/data/providers/connectivity_provider.dart';
 import 'package:problem_check_system/data/providers/local_database.dart';
 
 class InitialBinding implements Bindings {
@@ -9,11 +10,11 @@ class InitialBinding implements Bindings {
   void dependencies() {
     // 全局注册 GetStorage 实例 - 也改为使用 put 确保立即创建
     Get.put<GetStorage>(GetStorage(), permanent: true);
-
     // 全局注册 Dio 实例 - 使用 put 而不是 lazyPut，并设置为永久
     Get.put<Dio>(createDioInstance());
     //
     Get.put<LocalDatabase>(LocalDatabase());
+    Get.put<ConnectivityProvider>(ConnectivityProvider());
   }
 
   // 提取创建 Dio 实例的逻辑到单独的方法
diff --git a/lib/data/providers/connectivity_provider.dart b/lib/data/providers/connectivity_provider.dart
new file mode 100644
index 0000000..5ea7d83
--- /dev/null
+++ b/lib/data/providers/connectivity_provider.dart
@@ -0,0 +1,62 @@
+// lib/data/providers/connectivity_provider.dart
+import 'dart:async';
+import 'package:connectivity_plus/connectivity_plus.dart';
+import 'package:get/get.dart';
+import 'package:flutter/material.dart';
+
+class ConnectivityProvider extends GetxService {
+  final Connectivity _connectivity = Connectivity();
+  final RxBool isOnline = false.obs;
+  late StreamSubscription<List<ConnectivityResult>> _connectivitySubscription;
+
+  @override
+  void onInit() {
+    super.onInit();
+    _initConnectivityListener();
+  }
+
+  @override
+  void onClose() {
+    _connectivitySubscription.cancel();
+    super.onClose();
+  }
+
+  Future<void> _initConnectivityListener() async {
+    _connectivitySubscription = _connectivity.onConnectivityChanged.listen((
+      results,
+    ) {
+      final isConnected = results.any(
+        (result) =>
+            result == ConnectivityResult.mobile ||
+            result == ConnectivityResult.wifi ||
+            result == ConnectivityResult.ethernet,
+      );
+      isOnline.value = isConnected;
+      if (isConnected) {
+        Get.snackbar(
+          '网络状态',
+          '已连接到网络',
+          colorText: Colors.white,
+          backgroundColor: Colors.green,
+          snackPosition: SnackPosition.TOP,
+        );
+      } else {
+        Get.snackbar(
+          '网络状态',
+          '已断开网络连接',
+          colorText: Colors.white,
+          backgroundColor: Colors.red,
+          snackPosition: SnackPosition.TOP,
+        );
+      }
+    });
+
+    final initialResults = await _connectivity.checkConnectivity();
+    isOnline.value = initialResults.any(
+      (result) =>
+          result == ConnectivityResult.mobile ||
+          result == ConnectivityResult.wifi ||
+          result == ConnectivityResult.ethernet,
+    );
+  }
+}
diff --git a/lib/modules/auth/bindings/auth_binding.dart b/lib/modules/auth/bindings/auth_binding.dart
index 581a540..bc7b64e 100644
--- a/lib/modules/auth/bindings/auth_binding.dart
+++ b/lib/modules/auth/bindings/auth_binding.dart
@@ -1,5 +1,6 @@
 import 'package:get/get.dart';
 import 'package:dio/dio.dart';
+import 'package:get_storage/get_storage.dart';
 import 'package:problem_check_system/modules/auth/controllers/auth_controller.dart';
 import 'package:problem_check_system/data/providers/auth_provider.dart';
 
@@ -13,7 +14,10 @@ class AuthBinding implements Bindings {
     // 2. 注入控制器 (AuthController)，它依赖于 AuthProvider
     // 控制器通过 Get.find() 获取已注入的依赖
     Get.lazyPut<AuthController>(
-      () => AuthController(authProvider: Get.find<AuthProvider>()),
+      () => AuthController(
+        authProvider: Get.find<AuthProvider>(),
+        storage: Get.find<GetStorage>(),
+      ),
     );
   }
 }
diff --git a/lib/modules/auth/controllers/auth_controller.dart b/lib/modules/auth/controllers/auth_controller.dart
index df3c25a..1b67bfd 100644
--- a/lib/modules/auth/controllers/auth_controller.dart
+++ b/lib/modules/auth/controllers/auth_controller.dart
@@ -1,68 +1,99 @@
+// lib/modules/auth/controllers/auth_controller.dart
+import 'package:flutter/material.dart'; // 导入此库以使用 TextEditingController
 import 'package:get/get.dart';
 import 'package:dio/dio.dart';
 import 'package:get_storage/get_storage.dart';
-
-// 导入数据提供者和数据模型
+import 'package:connectivity_plus/connectivity_plus.dart';
 import 'package:problem_check_system/data/providers/auth_provider.dart';
 import 'package:problem_check_system/data/models/login_model.dart';
 import 'package:problem_check_system/app/routes/app_routes.dart';
 
 class AuthController extends GetxController {
   final AuthProvider _authProvider;
-  AuthController({required AuthProvider authProvider})
-    : _authProvider = authProvider;
+  final GetStorage _storage;
+
+  // 将 TextEditingController 移动到控制器中，由控制器管理它们的生命周期
+  late final TextEditingController usernameController;
+  late final TextEditingController passwordController;
 
-  final username = ''.obs;
-  final password = ''.obs;
   final isLoading = false.obs;
   final rememberPassword = false.obs;
 
-  final _box = GetStorage();
   static const _usernameKey = 'username';
   static const _passwordKey = 'password';
 
+  AuthController({
+    required AuthProvider authProvider,
+    required GetStorage storage,
+  }) : _authProvider = authProvider,
+       _storage = storage;
+
   @override
   void onInit() {
     super.onInit();
+    // 在 onInit 中初始化控制器
+    usernameController = TextEditingController();
+    passwordController = TextEditingController();
     _loadSavedCredentials();
   }
 
+  @override
+  void onClose() {
+    // 在 onClose 中销毁控制器，防止内存泄漏
+    usernameController.dispose();
+    passwordController.dispose();
+    super.onClose();
+  }
+
   void _loadSavedCredentials() {
-    final savedUsername = _box.read(_usernameKey);
-    final savedPassword = _box.read(_passwordKey);
+    final savedUsername = _storage.read(_usernameKey);
+    final savedPassword = _storage.read(_passwordKey);
 
     if (savedUsername != null && savedPassword != null) {
-      username.value = savedUsername;
-      password.value = savedPassword;
+      // 从本地存储加载值，并设置给控制器
+      usernameController.text = savedUsername;
+      passwordController.text = savedPassword;
       rememberPassword.value = true;
     }
   }
 
   String getToken() {
-    return '';
+    return _storage.read('token') ?? '';
   }
 
-  void updateUsername(String value) {
-    username.value = value;
-  }
-
-  void updatePassword(String value) {
-    password.value = value;
-  }
+  // 移除了 updateUsername 和 updatePassword 方法，因为不再需要它们来同步值。
+  // TextEditingController 本身就是值的来源。
 
   Future<void> login() async {
-    if (username.value.isEmpty || password.value.isEmpty) {
+    // 直接从控制器获取文本内容
+    final username = usernameController.text;
+    final password = passwordController.text;
+
+    if (username.isEmpty || password.isEmpty) {
       Get.snackbar('输入错误', '用户名和密码不能为空');
       return;
     }
 
     isLoading.value = true;
 
+    var connectivityResult = await (Connectivity().checkConnectivity());
+    bool isConnected =
+        connectivityResult.contains(ConnectivityResult.mobile) ||
+        connectivityResult.contains(ConnectivityResult.wifi) ||
+        connectivityResult.contains(ConnectivityResult.ethernet);
+
+    if (isConnected) {
+      await _onlineLogin(username, password);
+    } else {
+      await _offlineLogin(username, password);
+    }
+
+    isLoading.value = false;
+  }
+
+  Future<void> _onlineLogin(String username, String password) async {
     try {
-      final loginData = LoginModel(
-        username: username.value,
-        password: password.value,
-      );
+      final loginData = LoginModel(username: username, password: password);
 
       final response = await _authProvider.signIn(loginData);
 
@@ -70,15 +101,17 @@ class AuthController extends GetxController {
         final token = response.data['token'];
         final refreshToken = response.data['refreshToken'];
 
-        _box.write('token', token);
-        _box.write('refreshToken', refreshToken);
+        _storage.write('token', token);
+        _storage.write('refreshToken', refreshToken);
 
+        // 如果记住密码，保存用户名和密码
         if (rememberPassword.value) {
-          _box.write(_usernameKey, username.value);
-          _box.write(_passwordKey, password.value);
+          _storage.write(_usernameKey, username);
+          _storage.write(_passwordKey, password);
         } else {
-          _box.remove(_usernameKey);
-          _box.remove(_passwordKey);
+          // 否则清除所有本地凭据
+          _storage.remove(_usernameKey);
+          _storage.remove(_passwordKey);
         }
 
         Get.offAllNamed(AppRoutes.home);
@@ -94,18 +127,27 @@ class AuthController extends GetxController {
       }
     } catch (e) {
       Get.snackbar('错误', '发生未知错误: ${e.toString()}');
-    } finally {
-      isLoading.value = false;
     }
   }
 
-  Future<void> logout() async {
-    _box.remove('token');
-    _box.remove('refreshToken');
-    if (rememberPassword.value == false) {
-      _box.remove(_usernameKey);
-      _box.remove(_passwordKey);
+  Future<void> _offlineLogin(String username, String password) async {
+    final storedUsername = _storage.read(_usernameKey);
+    final storedPassword = _storage.read(_passwordKey);
+
+    if (storedUsername != null &&
+        storedPassword != null &&
+        storedUsername == username &&
+        storedPassword == password) {
+      Get.offAllNamed(AppRoutes.home);
+      Get.snackbar('离线登录成功', '您已离线登录到系统');
+    } else {
+      Get.snackbar('离线登录失败', '无网络连接，且无法验证本地凭证');
     }
+  }
+
+  Future<void> logout() async {
+    _storage.remove('token');
+    _storage.remove('refreshToken');
     Get.offAllNamed(AppRoutes.login);
   }
 }
diff --git a/lib/modules/auth/views/login_page.dart b/lib/modules/auth/views/login_page.dart
index d6ea5ca..463b63b 100644
--- a/lib/modules/auth/views/login_page.dart
+++ b/lib/modules/auth/views/login_page.dart
@@ -1,43 +1,20 @@
+// lib/modules/auth/views/login_page.dart
 import 'package:flutter/material.dart';
 import 'package:flutter_screenutil/flutter_screenutil.dart';
 import 'package:get/get.dart';
 import 'package:problem_check_system/modules/auth/controllers/auth_controller.dart';
 
-class LoginPage extends StatelessWidget {
+class LoginPage extends GetView<AuthController> {
   const LoginPage({super.key});
 
   @override
   Widget build(BuildContext context) {
-    final AuthController controller = Get.find<AuthController>();
-
-    // 在 build 方法中创建并初始化 TextEditingController
-    final TextEditingController usernameController = TextEditingController(
-      text: controller.username.value,
-    );
-    final TextEditingController passwordController = TextEditingController(
-      text: controller.password.value,
-    );
-
-    // 监听 AuthController 的响应式变量，以防它们在其他地方被修改
-    // 并更新到 TextEditingController。
-    // 这里使用 once() 或 ever() 都可以，但为了代码简洁，
-    // 我们主要关注初始同步。用户输入后，值会通过 onChanged 更新。
-    usernameController.text = controller.username.value;
-    passwordController.text = controller.password.value;
-
     return Scaffold(
-      resizeToAvoidBottomInset: false,
-      body: Stack(
-        children: [
-          _buildBackground(),
-          _buildLoginCard(controller, usernameController, passwordController),
-        ],
-      ),
+      body: Stack(children: [_buildBackground(), _buildLoginCard(controller)]),
     );
   }
 
   Widget _buildBackground() {
-    // ... 此部分代码不变 ...
     return Stack(
       children: [
         Container(
@@ -72,12 +49,8 @@ class LoginPage extends StatelessWidget {
     );
   }
 
-  // 修改 _buildLoginCard 方法签名，传入控制器
-  Widget _buildLoginCard(
-    AuthController controller,
-    TextEditingController usernameController,
-    TextEditingController passwordController,
-  ) {
+  // 修改 _buildLoginCard 方法，它不再需要传入 TextEditingController
+  Widget _buildLoginCard(AuthController controller) {
     return Positioned(
       left: 20.5.w,
       top: 220.5.h,
@@ -85,7 +58,7 @@ class LoginPage extends StatelessWidget {
         width: 334.w,
         height: 574.5.h,
         decoration: BoxDecoration(
-          color: const Color(0xFFFFFFFF).withOpacity(0.6), // 使用 withOpacity 更清晰
+          color: const Color(0xFFFFFFFF).withOpacity(0.6),
           borderRadius: BorderRadius.all(Radius.circular(23.5.r)),
         ),
         padding: EdgeInsets.all(24.w),
@@ -93,20 +66,18 @@ class LoginPage extends StatelessWidget {
           crossAxisAlignment: CrossAxisAlignment.start,
           children: [
             const SizedBox(height: 16),
-            // 使用新版 _buildTextFieldSection
+            // 直接使用控制器中的 TextEditingController
             _buildTextFieldSection(
               label: '账号',
               hintText: '请输入您的账号',
-              controller: usernameController,
-              onChanged: controller.updateUsername, // onChanged 保留，用于实时同步
+              controller: controller.usernameController,
             ),
             const SizedBox(height: 22),
             _buildTextFieldSection(
               label: '密码',
               hintText: '请输入您的密码',
               obscureText: true,
-              controller: passwordController,
-              onChanged: controller.updatePassword,
+              controller: controller.passwordController,
             ),
             const SizedBox(height: 9.5),
             _buildRememberPasswordRow(controller),
@@ -118,13 +89,12 @@ class LoginPage extends StatelessWidget {
     );
   }
 
-  // 修改 _buildTextFieldSection 以接受 TextEditingController
+  // 修改 _buildTextFieldSection，不再需要 onChanged 回调
   Widget _buildTextFieldSection({
     required String label,
     required String hintText,
     required TextEditingController controller,
     bool obscureText = false,
-    required Function(String) onChanged,
   }) {
     return Column(
       crossAxisAlignment: CrossAxisAlignment.start,
@@ -136,7 +106,6 @@ class LoginPage extends StatelessWidget {
         const SizedBox(height: 10.5),
         TextField(
           controller: controller, // 使用传入的控制器
-          onChanged: onChanged,
           obscureText: obscureText,
           style: const TextStyle(color: Colors.black),
           decoration: InputDecoration(
@@ -150,7 +119,6 @@ class LoginPage extends StatelessWidget {
   }
 
   Widget _buildRememberPasswordRow(AuthController controller) {
-    // ... 此部分代码不变 ...
     return Row(
       mainAxisAlignment: MainAxisAlignment.end,
       children: [
@@ -169,7 +137,6 @@ class LoginPage extends StatelessWidget {
   }
 
   Widget _buildLoginButton(AuthController controller) {
-    // ... 此部分代码不变 ...
     return SizedBox(
       width: double.infinity,
       child: ElevatedButton(
diff --git a/lib/modules/home/bindings/home_binding.dart b/lib/modules/home/bindings/home_binding.dart
index 80ded33..0798137 100644
--- a/lib/modules/home/bindings/home_binding.dart
+++ b/lib/modules/home/bindings/home_binding.dart
@@ -1,6 +1,8 @@
 import 'package:dio/dio.dart';
 import 'package:get/get.dart';
+import 'package:get_storage/get_storage.dart';
 import 'package:problem_check_system/data/providers/auth_provider.dart';
+import 'package:problem_check_system/data/providers/connectivity_provider.dart';
 import 'package:problem_check_system/data/providers/local_database.dart';
 import 'package:problem_check_system/modules/auth/controllers/auth_controller.dart';
 import 'package:problem_check_system/modules/home/controllers/home_controller.dart';
@@ -12,15 +14,24 @@ class HomeBinding implements Bindings {
   void dependencies() {
     final Dio dio = Get.find<Dio>();
     final LocalDatabase database = Get.find<LocalDatabase>();
+    final ConnectivityProvider connectivityProvider =
+        Get.find<ConnectivityProvider>();
     // 惰性注入 HomeController，只在第一次被调用时创建
     Get.lazyPut<HomeController>(() => HomeController());
     Get.lazyPut<ProblemController>(
-      () => ProblemController(localDatabase: database, dio: dio),
+      () => ProblemController(
+        localDatabase: database,
+        dio: dio,
+        connectivityProvider: connectivityProvider,
+      ),
     );
     Get.lazyPut<MyController>(() => MyController());
     Get.lazyPut<AuthProvider>(() => AuthProvider(dio: dio));
     Get.lazyPut<AuthController>(
-      () => AuthController(authProvider: Get.find<AuthProvider>()),
+      () => AuthController(
+        authProvider: Get.find<AuthProvider>(),
+        storage: Get.find<GetStorage>(),
+      ),
     );
   }
 }
diff --git a/lib/modules/my/views/my_page.dart b/lib/modules/my/views/my_page.dart
index 202c272..7521d0f 100644
--- a/lib/modules/my/views/my_page.dart
+++ b/lib/modules/my/views/my_page.dart
@@ -40,10 +40,7 @@ class MyPage extends StatelessWidget {
           gradient: LinearGradient(
             begin: Alignment.topCenter,
             end: Alignment.bottomCenter,
-            colors: [
-              const Color(0xFFE4F0FF),
-              const Color(0xFFF1F7FF).withValues(alpha: 25.5),
-            ],
+            colors: [const Color(0xFF418CFC), const Color(0x713DBFFC)],
           ),
         ),
       ),
diff --git a/lib/modules/problem/bindings/problem_binding.dart b/lib/modules/problem/bindings/problem_binding.dart
index 5840803..4fc8e2e 100644
--- a/lib/modules/problem/bindings/problem_binding.dart
+++ b/lib/modules/problem/bindings/problem_binding.dart
@@ -1,5 +1,6 @@
 import 'package:get/get.dart';
 import 'package:dio/dio.dart';
+import 'package:problem_check_system/data/providers/connectivity_provider.dart';
 import 'package:problem_check_system/modules/problem/controllers/problem_controller.dart';
 import 'package:problem_check_system/data/providers/local_database.dart';
 
@@ -13,6 +14,7 @@ class ProblemBinding implements Bindings {
       () => ProblemController(
         localDatabase: Get.find<LocalDatabase>(),
         dio: Get.find<Dio>(),
+        connectivityProvider: Get.find<ConnectivityProvider>(),
       ),
     );
   }
diff --git a/lib/modules/problem/controllers/problem_controller.dart b/lib/modules/problem/controllers/problem_controller.dart
index a645e20..7a39792 100644
--- a/lib/modules/problem/controllers/problem_controller.dart
+++ b/lib/modules/problem/controllers/problem_controller.dart
@@ -1,27 +1,34 @@
+// modules/problem/controllers/problem_controller.dart
 import 'package:dio/dio.dart';
 import 'package:get/get.dart' hide MultipartFile, FormData;
 import 'dart:io';
 import 'package:path/path.dart' as path;
 import '../../../data/models/problem_model.dart';
 import '../../../data/providers/local_database.dart';
+import '../../../data/providers/connectivity_provider.dart'; // 更新路径
 
 class ProblemController extends GetxController {
   final LocalDatabase _localDatabase;
   final RxList<Problem> problems = <Problem>[].obs;
   final RxBool isLoading = false.obs;
   final Dio _dio;
+  final ConnectivityProvider _connectivityProvider;
 
-  // 依赖注入，由 bindings 传入所有依赖
-  ProblemController({required LocalDatabase localDatabase, required Dio dio})
-    : _localDatabase = localDatabase,
-      _dio = dio;
+  ProblemController({
+    required LocalDatabase localDatabase,
+    required Dio dio,
+    required ConnectivityProvider connectivityProvider,
+  }) : _localDatabase = localDatabase,
+       _dio = dio,
+       _connectivityProvider = connectivityProvider;
+
+  // 使用 provider 中的 isOnline
+  RxBool get isOnline => _connectivityProvider.isOnline;
 
-  // 获取所有已选中的问题对象
   List<Problem> get selectedProblems {
     return problems.where((p) => p.isChecked.value).toList();
   }
 
-  // 获取未上传的问题
   List<Problem> get unuploadedProblems {
     return problems.where((p) => !p.isUploaded).toList();
   }
@@ -44,16 +51,13 @@ class ProblemController extends GetxController {
     }
   }
 
-  /// 在本地数据库和GetX列表中添加一个新问题
   Future<void> addProblem(Problem problem) async {
     try {
-      // 确保问题有ID
       if (problem.id == null) {
         problem = problem.copyWith(
           id: DateTime.now().millisecondsSinceEpoch.toString(),
         );
       }
-
       await _localDatabase.insertProblem(problem);
       problems.add(problem);
     } catch (e) {
@@ -62,7 +66,6 @@ class ProblemController extends GetxController {
     }
   }
 
-  /// 在本地数据库和GetX列表中更新一个现有问题
   Future<void> updateProblem(Problem problem) async {
     try {
       await _localDatabase.updateProblem(problem);
@@ -76,16 +79,11 @@ class ProblemController extends GetxController {
     }
   }
 
-  /// 删除单个问题
   Future<void> deleteProblem(Problem problem) async {
     try {
       if (problem.id != null) {
         await _localDatabase.deleteProblem(problem.id!);
-
-        // 从本地列表中移除
         problems.remove(problem);
-
-        // 删除关联的图片文件
         await _deleteProblemImages(problem);
       }
     } catch (e) {
@@ -94,14 +92,12 @@ class ProblemController extends GetxController {
     }
   }
 
-  /// 批量删除选中的问题
   Future<void> deleteSelectedProblems() async {
     final problemsToDelete = selectedProblems;
     if (problemsToDelete.isEmpty) {
       Get.snackbar('提示', '请至少选择一个问题进行删除');
       return;
     }
-
     try {
       for (var problem in problemsToDelete) {
         await deleteProblem(problem);
@@ -112,7 +108,6 @@ class ProblemController extends GetxController {
     }
   }
 
-  /// 删除问题关联的图片文件
   Future<void> _deleteProblemImages(Problem problem) async {
     for (var imagePath in problem.imagePaths) {
       try {
@@ -126,7 +121,6 @@ class ProblemController extends GetxController {
     }
   }
 
-  /// 上传单个问题到服务器
   Future<bool> uploadProblem(Problem problem) async {
     try {
       final formData = FormData.fromMap({
@@ -136,7 +130,6 @@ class ProblemController extends GetxController {
         'boundInfo': problem.boundInfo ?? '',
       });
 
-      // 添加图片文件
       for (var imagePath in problem.imagePaths) {
         final file = File(imagePath);
         if (await file.exists()) {
@@ -162,7 +155,6 @@ class ProblemController extends GetxController {
       );
 
       if (response.statusCode == 200) {
-        // 标记为已上传
         final updatedProblem = problem.copyWith(isUploaded: true);
         await updateProblem(updatedProblem);
         return true;
@@ -183,8 +175,12 @@ class ProblemController extends GetxController {
     }
   }
 
-  /// 批量上传所有未上传的问题
   Future<void> uploadAllUnuploaded() async {
+    if (!isOnline.value) {
+      Get.snackbar('提示', '当前无网络，无法上传');
+      return;
+    }
+
     final unuploaded = unuploadedProblems;
     if (unuploaded.isEmpty) {
       Get.snackbar('提示', '没有需要上传的问题');
@@ -199,7 +195,6 @@ class ProblemController extends GetxController {
       if (success) {
         successCount++;
       }
-      // 添加短暂延迟，避免服务器压力过大
       await Future.delayed(const Duration(milliseconds: 500));
     }
 
@@ -214,7 +209,6 @@ class ProblemController extends GetxController {
     }
   }
 
-  /// 绑定信息到问题
   Future<void> bindInfoToProblem(String id, String info) async {
     try {
       final problem = problems.firstWhere((p) => p.id == id);
@@ -226,7 +220,6 @@ class ProblemController extends GetxController {
     }
   }
 
-  /// 清除所有选中的状态
   void clearSelections() {
     for (var problem in problems) {
       problem.isChecked.value = false;
diff --git a/lib/modules/problem/views/problem_page.dart b/lib/modules/problem/views/problem_page.dart
index 0b03d58..7ef64d3 100644
--- a/lib/modules/problem/views/problem_page.dart
+++ b/lib/modules/problem/views/problem_page.dart
@@ -1,3 +1,4 @@
+// problem_page.dart
 import 'package:flutter/material.dart';
 import 'package:flutter_screenutil/flutter_screenutil.dart';
 import 'package:get/get.dart';
@@ -28,12 +29,9 @@ class ProblemPage extends StatelessWidget {
                 alignment: Alignment.bottomLeft,
                 decoration: const BoxDecoration(
                   gradient: LinearGradient(
-                    begin: Alignment.centerLeft, // 从左开始
-                    end: Alignment.centerRight, // 到右结束
-                    colors: [
-                      Color(0xFF418CFC), // 左侧颜色
-                      Color(0xFF3DBFFC), // 右侧颜色
-                    ],
+                    begin: Alignment.centerLeft,
+                    end: Alignment.centerRight,
+                    colors: [Color(0xFF418CFC), Color(0xFF3DBFFC)],
                   ),
                 ),
                 child: TabBar(
@@ -50,17 +48,17 @@ class ProblemPage extends StatelessWidget {
                     Tab(text: '历史问题列表'),
                   ],
                   labelStyle: TextStyle(
-                    fontFamily: 'MyFont', // 字体名称
-                    fontWeight: FontWeight.w800, // 字重
-                    fontSize: 14.sp, // 字体大小
+                    fontFamily: 'MyFont',
+                    fontWeight: FontWeight.w800,
+                    fontSize: 14.sp,
                   ),
                   unselectedLabelStyle: TextStyle(
                     fontFamily: 'MyFont',
                     fontWeight: FontWeight.w800,
                     fontSize: 14.sp,
                   ),
-                  labelColor: Colors.black, // 选中文字颜色
-                  unselectedLabelColor: Colors.white, // 未选中文字颜色
+                  labelColor: Colors.black,
+                  unselectedLabelColor: Colors.white,
                 ),
               ),
               Expanded(
@@ -139,30 +137,32 @@ class ProblemPage extends StatelessWidget {
             ],
           ),
         ),
-        floatingActionButton: FloatingActionButton(
-          heroTag: "abc",
-          onPressed: () {
-            // 批量上传功能
-            problemController.uploadAllUnuploaded();
-          },
-          foregroundColor: Colors.white,
-          backgroundColor: Colors.red[300],
-          child: const Icon(Icons.file_upload_outlined),
-        ),
+        floatingActionButton: Obx(() {
+          final bool isOnline = problemController.isOnline.value;
+          return FloatingActionButton(
+            heroTag: "abc",
+            onPressed: isOnline
+                ? () => problemController.uploadAllUnuploaded()
+                : null,
+            foregroundColor: Colors.white,
+            backgroundColor: isOnline ? Colors.red[300] : Colors.grey[400],
+            child: Icon(
+              isOnline ? Icons.file_upload_outlined : Icons.cloud_off_outlined,
+            ),
+          );
+        }),
       ),
     );
   }
 
-  // 构建可滑动的ProblemCard组件
   Widget _buildSwipeableProblemCard(
     Problem problem,
     ProblemController controller, {
     ProblemCardViewType viewType = ProblemCardViewType.buttons,
   }) {
-    // 使用Dismissible组件实现左滑删除
     return Dismissible(
       key: Key(problem.id ?? UniqueKey().toString()),
-      direction: DismissDirection.endToStart, // 只允许从右向左滑动
+      direction: DismissDirection.endToStart,
       background: Container(
         color: Colors.red,
         alignment: Alignment.centerRight,
@@ -170,11 +170,9 @@ class ProblemPage extends StatelessWidget {
         child: Icon(Icons.delete, color: Colors.white, size: 30.sp),
       ),
       confirmDismiss: (direction) async {
-        // 显示确认对话框
         return await _showDeleteConfirmationDialog(problem);
       },
       onDismissed: (direction) {
-        // 用户确认后执行删除操作
         controller.deleteProblem(problem);
         Get.snackbar('成功', '问题已删除');
       },
@@ -182,9 +180,7 @@ class ProblemPage extends StatelessWidget {
     );
   }
 
-  // 显示删除确认对话框
   Future<bool> _showDeleteConfirmationDialog(Problem problem) async {
-    // 使用 Get.bottomSheet 实现底部确认表单
     return await Get.bottomSheet<bool>(
           Container(
             padding: EdgeInsets.symmetric(horizontal: 16.0),
@@ -200,7 +196,6 @@ class ProblemPage extends StatelessWidget {
                 mainAxisSize: MainAxisSize.min,
                 crossAxisAlignment: CrossAxisAlignment.stretch,
                 children: [
-                  // 标题
                   SizedBox(height: 16),
                   Text(
                     '确认删除',
@@ -208,14 +203,12 @@ class ProblemPage extends StatelessWidget {
                     style: TextStyle(fontSize: 18, fontWeight: FontWeight.bold),
                   ),
                   SizedBox(height: 8),
-                  // 内容
                   Text(
                     '确定要删除这个问题吗？此操作不可撤销。',
                     textAlign: TextAlign.center,
                     style: TextStyle(fontSize: 14, color: Colors.grey[600]),
                   ),
                   SizedBox(height: 24),
-                  // 删除按钮
                   ElevatedButton(
                     onPressed: () => Get.back(result: true),
                     style: ElevatedButton.styleFrom(
@@ -231,7 +224,6 @@ class ProblemPage extends StatelessWidget {
                     ),
                   ),
                   SizedBox(height: 8),
-                  // 取消按钮
                   TextButton(
                     onPressed: () => Get.back(result: false),
                     style: TextButton.styleFrom(
@@ -247,7 +239,7 @@ class ProblemPage extends StatelessWidget {
               ),
             ),
           ),
-          isDismissible: false, // 阻止用户点击外部关闭
+          isDismissible: false,
         ) ??
         false;
   }
diff --git a/pubspec.lock b/pubspec.lock
index 80703a6..a96742b 100644
--- a/pubspec.lock
+++ b/pubspec.lock
@@ -74,7 +74,7 @@ packages:
     source: hosted
     version: "0.3.4+2"
   crypto:
-    dependency: transitive
+    dependency: "direct main"
     description:
       name: crypto
       sha256: "1e445881f28f22d6140f181e07737b22f1e099a5e1ff94b0af2f9e4a463f4855"
diff --git a/pubspec.yaml b/pubspec.yaml
index f285d04..b290be6 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -8,6 +8,7 @@ environment:
 
 dependencies:
   connectivity_plus: ^6.1.5
+  crypto: ^3.0.6
   dio: ^5.9.0
   flutter:
     sdk: flutter