diff --git a/lib/app/app.dart b/lib/app/app.dart
index 3e2cbfe..43409be 100644
--- a/lib/app/app.dart
+++ b/lib/app/app.dart
@@ -32,6 +32,8 @@ class App extends StatelessWidget {
                 fontFamily: 'HannotateSC',
                 colorScheme: ColorScheme.fromSeed(seedColor: Colors.white),
                 useMaterial3: true,
+                ///系统主题色
+                primaryColor: const Color(0xFF00B6F1)
               ),
               builder: EasyLoading.init(
                   builder: (context, child) => ResponsiveBreakpoints(breakpoints: const [
diff --git a/lib/app/splash_page.dart b/lib/app/splash_page.dart
index 0973226..5cb8f40 100644
--- a/lib/app/splash_page.dart
+++ b/lib/app/splash_page.dart
@@ -19,6 +19,7 @@ import 'package:wow_english/utils/log_util.dart';
 import 'package:wow_english/utils/sp_util.dart';
 
 import '../common/core/app_consts.dart';
+import '../common/core/module_cache.dart';
 import '../common/widgets/webview_dialog.dart';
 
 class SplashPage extends StatelessWidget {
@@ -167,6 +168,7 @@ class _TransitionViewState extends State<TransitionView> {
   void init() async {
     changeDevice();
     await SpUtil.preInit();
+    ModuleCache.instance.init();
     AudioPlayerUtil.getInstance().playAudio(AudioPlayerUtilType.welcomeToWow);
     startTime();
   }
diff --git a/lib/common/core/module_cache.dart b/lib/common/core/module_cache.dart
new file mode 100644
index 0000000..ccfd6d4
--- /dev/null
+++ b/lib/common/core/module_cache.dart
@@ -0,0 +1,74 @@
+import 'dart:convert';
+import 'dart:ui';
+
+import '../../models/course_module_entity.dart';
+import '../../utils/sp_util.dart';
+import '../utils/color_parser.dart';
+
+///模块缓存类
+class ModuleCache {
+  // Private constructor
+  ModuleCache._privateConstructor();
+
+  // Singleton instance
+  static final ModuleCache _instance = ModuleCache._privateConstructor();
+
+  // Public accessor for the singleton instance
+  static ModuleCache get instance => _instance;
+
+  // Variable to store the current module entity
+  CourseModuleEntity? _currentModule;
+
+  // Key for SharedPreferences
+  static const String _moduleKey = "courseModule";
+
+  // Initialize the cache by loading data from SharedPreferences
+  Future<void> init() async {
+    String? jsonString = SpUtil.getInstance().get<String>(_moduleKey);
+    if (jsonString != null) {
+      _currentModule = CourseModuleEntity.fromJson(json.decode(jsonString));
+    }
+  }
+
+  // Getter and setter for the current module
+  CourseModuleEntity? get currentModule => _currentModule;
+  set currentModule(CourseModuleEntity? value) {
+    _currentModule = value;
+    _saveToPrefs(value);
+  }
+
+  // Method to clear the cached module data
+  void clear() {
+    _currentModule = null;
+    _clearPrefs();
+  }
+
+  // Save module data to SharedPreferences
+  void _saveToPrefs(CourseModuleEntity? module) {
+    if (module != null) {
+      String jsonString = json.encode(module.toJson());
+      SpUtil.getInstance().setData(_moduleKey, jsonString);
+    } else {
+      SpUtil.getInstance().remove(_moduleKey);
+    }
+  }
+
+  String getCurrentThemeColorStr({String? colorStr}) {
+    return colorStr ?? _currentModule.getSafeThemeColor();
+  }
+
+  ///根据当前课程阶段获取系统主题色
+  Color getCurrentThemeColor({String? colorStr}) {
+    return parseColor(getCurrentThemeColorStr(colorStr: colorStr));
+  }
+
+  ///根据当前课程阶段获取系统主题名称
+  String getCurrentThemeName({String? name}) {
+    return name ?? _currentModule.getSafeName();
+  }
+
+  // Clear all data from SharedPreferences
+  void _clearPrefs() async {
+    SpUtil.getInstance().remove(_moduleKey);
+  }
+}
\ No newline at end of file
diff --git a/lib/common/utils/color_parser.dart b/lib/common/utils/color_parser.dart
new file mode 100644
index 0000000..5581a51
--- /dev/null
+++ b/lib/common/utils/color_parser.dart
@@ -0,0 +1,20 @@
+import 'package:flutter/material.dart';
+
+/// 将"#80FFFF00"字符串类型的颜色值转成Color对象类型
+Color parseColor(String color) {
+  // Remove the '#' character from the beginning of the string
+  String hexColor = color.replaceAll("#", "");
+
+  // Check if the color is in the correct length (6 or 8)
+  if (hexColor.length == 6) {
+    // Add 'FF' for the alpha value if not provided
+    hexColor = "FF$hexColor";
+  } else if (hexColor.length != 8) {
+    ///如果数据异常，返回主题色兜底
+    // throw const FormatException("Invalid color format");
+    hexColor = "FF00B6F1";
+  }
+
+  // Convert the hex string to an integer and create a Color object
+  return Color(int.parse(hexColor, radix: 16));
+}
\ No newline at end of file
diff --git a/lib/generated/json/base/json_convert_content.dart b/lib/generated/json/base/json_convert_content.dart
index f673a33..4e904a5 100644
--- a/lib/generated/json/base/json_convert_content.dart
+++ b/lib/generated/json/base/json_convert_content.dart
@@ -139,7 +139,12 @@ class JsonConvert {
         if (value == null) {
           return null;
         }
-        return convertFuncMap[type]!(value as Map<String, dynamic>) as T;
+        var covertFunc = convertFuncMap[type]!;
+        if (covertFunc is Map<String, dynamic>) {
+          return covertFunc(value as Map<String, dynamic>) as T;
+        } else {
+          return covertFunc(Map<String, dynamic>.from(value)) as T;
+        }
       } else {
         throw UnimplementedError(
             '$type unimplemented,you can try running the app again');
diff --git a/lib/models/course_module_entity.dart b/lib/models/course_module_entity.dart
index 0be37ea..9c167ce 100644
--- a/lib/models/course_module_entity.dart
+++ b/lib/models/course_module_entity.dart
@@ -21,14 +21,49 @@ class CourseModuleEntity {
   int? status;
   String? courseModuleThemeColor;
 
-  CourseModuleEntity();
+  // 无参构造函数
+  CourseModuleEntity.empty();
 
-  factory CourseModuleEntity.fromJson(Map<String, dynamic> json) => $CourseModuleEntityFromJson(json);
+  // 命名构造函数
+  CourseModuleEntity(
+      {int? id,
+      String? code,
+      String? courseModuleName,
+      String? courseModuleThemeColor});
+
+  factory CourseModuleEntity.fromJson(Map<String, dynamic> json) =>
+      $CourseModuleEntityFromJson(json);
 
   Map<String, dynamic> toJson() => $CourseModuleEntityToJson(this);
 
+  // Factory constructor for creating an instance with only three parameters
+  factory CourseModuleEntity.of(int? courseModuleId, String? courseModuleCode,
+      String? courseModuleName, String? courseModuleThemeColor) {
+    return CourseModuleEntity(
+      id: courseModuleId,
+      code: courseModuleCode,
+      courseModuleName: courseModuleName,
+      courseModuleThemeColor: courseModuleThemeColor,
+      // Set default values or leave other fields null
+    );
+  }
+
   @override
   String toString() {
     return jsonEncode(this);
   }
 }
+
+///对可空的CourseModuleEntity对象扩展
+extension PersonSafeExt on CourseModuleEntity? {
+
+  ///获取非空的主题色，系统主题色0xFF00B6F1兜底
+  String getSafeThemeColor() {
+    return this?.courseModuleThemeColor ??  '0xFF00B6F1';
+  }
+
+  ///获取非空的阶段名称
+  String getSafeName() {
+    return this?.name ?? 'learn wow!';
+  }
+}
diff --git a/lib/pages/module/course_module_page.dart b/lib/pages/module/course_module_page.dart
index a827b88..806b372 100644
--- a/lib/pages/module/course_module_page.dart
+++ b/lib/pages/module/course_module_page.dart
@@ -5,9 +5,10 @@ import 'package:wow_english/common/widgets/we_app_bar.dart';
 import 'package:wow_english/models/course_module_entity.dart';
 import 'package:wow_english/route/route.dart';
 
+import '../../common/core/module_cache.dart';
 import '../../common/utils/click_with_music_controller.dart';
+import '../../common/utils/color_parser.dart';
 import '../../utils/audio_player_util.dart';
-import '../section/courese_module_model.dart';
 import 'bloc/module_bloc.dart';
 import 'widgets/module_item_widget.dart';
 
@@ -94,12 +95,11 @@ class _LessonPageView extends StatelessWidget {
                                 //     ? Colors.red
                                 //     : Colors.white,
                                 color:
-                                    CourseModuleModel(model?.code ?? 'Phase-1')
-                                        .color
+                                  parseColor(model.getSafeThemeColor())
                                         .withOpacity(
                                             bloc.currentPageIndex == index
                                                 ? 1
-                                                : 0.35),
+                                                : 0.15),
                                 borderRadius: BorderRadius.circular(5.r),
                                 border: Border.all(
                                   width: 0.5,
@@ -167,6 +167,7 @@ class _LessonPageView extends StatelessWidget {
               model: model,
               isSelected: bloc.currentPageIndex == index,
               onClickEvent: () {
+                ModuleCache.instance.currentModule = model;
                 ///todo 不同阶段音乐文件待提供
                 ClickWithMusicController.instance.playMusicAndPerformAction(
                     context,
diff --git a/lib/pages/module/widgets/module_item_widget.dart b/lib/pages/module/widgets/module_item_widget.dart
index 81e53f8..89dce77 100644
--- a/lib/pages/module/widgets/module_item_widget.dart
+++ b/lib/pages/module/widgets/module_item_widget.dart
@@ -1,14 +1,15 @@
 import 'package:flutter/material.dart';
 import 'package:flutter_screenutil/flutter_screenutil.dart';
 import 'package:wow_english/common/extension/string_extension.dart';
+import 'package:wow_english/common/utils/color_parser.dart';
 import 'package:wow_english/common/widgets/ow_image_widget.dart';
 import 'package:wow_english/models/course_module_entity.dart';
 
-import '../../section/courese_module_model.dart';
-
 ///阶段（模块）item布局
 class ModuleItemWidget extends StatelessWidget {
-  const ModuleItemWidget({super.key, required this.isSelected, this.model, this.onClickEvent});
+  const ModuleItemWidget(
+      {super.key, required this.isSelected, this.model, this.onClickEvent});
+
   ///是否被选中
   final bool isSelected;
   final CourseModuleEntity? model;
@@ -23,7 +24,7 @@ class ModuleItemWidget extends StatelessWidget {
         }
         onClickEvent?.call();
       },
-      child: isSelected?_selectWidget():_unSelectWidget(),
+      child: isSelected ? _selectWidget() : _unSelectWidget(),
     );
   }
 
@@ -31,12 +32,9 @@ class ModuleItemWidget extends StatelessWidget {
     return Container(
       padding: const EdgeInsets.all(20),
       decoration: BoxDecoration(
-          image: DecorationImage(
-              image: AssetImage('gendubeij'.assetPng)
-          )
-      ),
+          image: DecorationImage(image: AssetImage('gendubeij'.assetPng))),
       child: OwImageWidget(
-        name: model?.picUrl??'',
+        name: model?.picUrl ?? '',
       ),
     );
   }
@@ -45,48 +43,37 @@ class ModuleItemWidget extends StatelessWidget {
     return Container(
       padding: const EdgeInsets.all(10),
       decoration: BoxDecoration(
-          image: DecorationImage(
-              image: AssetImage(
-                  'gendubeij'.assetPng,
-              ),
-            fit: BoxFit.fill
-          ),
+        image: DecorationImage(
+            image: AssetImage(
+              'gendubeij'.assetPng,
+            ),
+            fit: BoxFit.fill),
       ),
-      child:  Column(
+      child: Column(
         mainAxisAlignment: MainAxisAlignment.spaceBetween,
         children: [
           Expanded(
             child: OwImageWidget(
-              name: model?.picUrl??'',
+              name: model?.picUrl ?? '',
             ),
           ),
           10.verticalSpace,
           Container(
             decoration: BoxDecoration(
-              color: CourseModuleModel(model?.code??'Phase-1').color,
-              borderRadius: BorderRadius.circular(6.r),
-              border: Border.all(
-                color: const Color(0xFF333333),
-                width: 1.0
-              )
-            ),
+                color: parseColor(model.getSafeThemeColor()),
+                borderRadius: BorderRadius.circular(6.r),
+                border: Border.all(color: const Color(0xFF333333), width: 1.0)),
             padding: EdgeInsets.symmetric(horizontal: 10.w),
             child: Column(
               children: [
                 Text(
-                  model?.name??'',
-                  style: TextStyle(
-                      color: Colors.white,
-                      fontSize: 12.sp
-                  ),
+                  model?.getSafeName() ?? '',
+                  style: TextStyle(color: Colors.white, fontSize: 12.sp),
                 ),
                 Text(
-                  model?.des??'',
+                  model?.des ?? '',
                   maxLines: 1,
-                  style: TextStyle(
-                      color: Colors.white,
-                      fontSize: 12.sp
-                  ),
+                  style: TextStyle(color: Colors.white, fontSize: 12.sp),
                 )
               ],
             ),
@@ -95,4 +82,4 @@ class ModuleItemWidget extends StatelessWidget {
       ),
     );
   }
-}
\ No newline at end of file
+}
diff --git a/lib/pages/section/bloc/section_bloc.dart b/lib/pages/section/bloc/section_bloc.dart
index b27e492..afcb1d7 100644
--- a/lib/pages/section/bloc/section_bloc.dart
+++ b/lib/pages/section/bloc/section_bloc.dart
@@ -38,6 +38,7 @@ class SectionBloc extends Bloc<SectionEvent, SectionState> {
 
   ScrollController get indicatorSrollController => _indicatorSrollController;
 
+  ///之前传进来是用于根据courseModuleCode获取主题色的，现在不用了。参数还是先留着，预防后面需要
   CourseUnitEntity _courseUnitEntity;
 
   CourseUnitEntity get courseUnitEntity => _courseUnitEntity;
diff --git a/lib/pages/section/section_page.dart b/lib/pages/section/section_page.dart
index 096dac0..f2d32d4 100644
--- a/lib/pages/section/section_page.dart
+++ b/lib/pages/section/section_page.dart
@@ -3,6 +3,7 @@ import 'package:flutter/material.dart';
 import 'package:flutter_bloc/flutter_bloc.dart';
 import 'package:flutter_screenutil/flutter_screenutil.dart';
 import 'package:nested_scroll_views/material.dart';
+import 'package:wow_english/common/core/module_cache.dart';
 import 'package:wow_english/common/core/user_util.dart';
 import 'package:wow_english/common/utils/click_with_music_controller.dart';
 import 'package:wow_english/models/course_unit_entity.dart';
@@ -138,9 +139,7 @@ class _SectionPageView extends StatelessWidget {
               await bloc.requestEnterClass(courseLessonId, () {
                 pushNamed(AppRouteName.topicPic, arguments: {
                   'courseLessonId': courseLessonId,
-                  'moduleColor': CourseModuleModel(
-                          bloc.courseUnitEntity.courseModuleCode ?? 'Phase-1')
-                      .color
+                  'moduleColor': ModuleCache.instance.getCurrentThemeColor()
                 }).then((value) {
                   if (value != null) {
                     Map<String, dynamic> dataMap =
@@ -175,7 +174,6 @@ class _SectionPageView extends StatelessWidget {
                 children: [
                   SectionHeaderWidget(
                       title: bloc.getCourseUnitDetail().name,
-                      courseModuleCode: bloc.courseUnitEntity.courseModuleCode,
                       onBack: () {
                         popPage(data: {
                           'needRefresh': bloc.courseUnitEntityChanged,
@@ -281,9 +279,7 @@ Widget _itemTransCard(
           const SizedBox(height: 16.0),
           // 间距
           CircularProgressIndicator(
-              color: CourseModuleModel(
-                      bloc.courseUnitEntity.courseModuleCode ?? 'Phase-1')
-                  .color),
+              color: ModuleCache.instance.getCurrentThemeColor()),
           // 加载动画
         ],
       ),
@@ -332,7 +328,6 @@ Widget _itemTransCard(
                     sectionData.id.toString(), sectionData.courseType));
               },
               child: SectionItem(
-                courseModuleId: bloc.courseUnitEntity.courseModuleCode,
                 lessons: sectionData,
               ),
             );
diff --git a/lib/pages/section/widgets/section_header_widget.dart b/lib/pages/section/widgets/section_header_widget.dart
index 82739c5..4c0d0c7 100644
--- a/lib/pages/section/widgets/section_header_widget.dart
+++ b/lib/pages/section/widgets/section_header_widget.dart
@@ -4,17 +4,15 @@ import 'package:flutter_screenutil/flutter_screenutil.dart';
 import 'package:wow_english/common/extension/string_extension.dart';
 import 'package:wow_english/pages/user/bloc/user_bloc.dart';
 
-import '../courese_module_model.dart';
+import '../../../common/core/module_cache.dart';
 
 /// 环节（课程）列表页标题栏
 class SectionHeaderWidget extends StatelessWidget {
   const SectionHeaderWidget(
-      {super.key, this.title, this.courseModuleCode, this.onBack});
+      {super.key, this.title, this.onBack});
 
   final String? title;
 
-  final String? courseModuleCode;
-
   final VoidCallback? onBack;
 
   @override
@@ -24,7 +22,7 @@ class SectionHeaderWidget extends StatelessWidget {
         return Container(
             height: 45,
             width: double.infinity,
-            color: CourseModuleModel(courseModuleCode ?? 'Phase-1').color,
+            color: ModuleCache.instance.getCurrentThemeColor(),
             padding: EdgeInsets.symmetric(horizontal: 9.5.w),
             child: Row(
               children: [
@@ -49,9 +47,7 @@ class SectionHeaderWidget extends StatelessWidget {
                 20.horizontalSpace,
                 Expanded(
                     child: Text(
-                  title ??
-                      CourseModuleModel(courseModuleCode ?? 'Phase-1')
-                          .courseModuleTitle,
+                  title ?? ModuleCache.instance.getCurrentThemeName(),
                   textAlign: TextAlign.left,
                   style: const TextStyle(color: Colors.white, fontSize: 30.0),
                 )),
diff --git a/lib/pages/section/widgets/section_item.dart b/lib/pages/section/widgets/section_item.dart
index 1adb3f8..eb0b7c4 100644
--- a/lib/pages/section/widgets/section_item.dart
+++ b/lib/pages/section/widgets/section_item.dart
@@ -3,15 +3,13 @@ import 'package:flutter_screenutil/flutter_screenutil.dart';
 import 'package:wow_english/common/extension/string_extension.dart';
 import 'package:wow_english/common/widgets/ow_image_widget.dart';
 
+import '../../../common/core/module_cache.dart';
 import '../../../models/course_section_entity.dart';
-import '../../../models/course_unit_entity.dart';
-import '../courese_module_model.dart';
 
 ///环节item布局
 class SectionItem extends StatelessWidget {
-  const SectionItem({super.key, this.lessons, this.courseModuleId});
+  const SectionItem({super.key, this.lessons});
 
-  final String? courseModuleId;
   final CourseSectionEntity? lessons;
 
   @override
@@ -62,7 +60,7 @@ class SectionItem extends StatelessWidget {
                   width: 2,
                   color: const Color(0xFF140C10),
                 ),
-                color: CourseModuleModel(courseModuleId ?? 'Phase-1').color,
+                color: ModuleCache.instance.getCurrentThemeColor(),
                 borderRadius: BorderRadius.circular(6)
             ),
             padding: EdgeInsets.symmetric(horizontal: 10.w),
diff --git a/lib/pages/unit/bloc.dart b/lib/pages/unit/bloc.dart
index 5f45097..6a2ce17 100644
--- a/lib/pages/unit/bloc.dart
+++ b/lib/pages/unit/bloc.dart
@@ -2,6 +2,7 @@ import 'package:bloc/bloc.dart';
 import 'package:wow_english/pages/unit/widget/home_tab_header_widget.dart';
 import 'package:wow_english/utils/audio_player_util.dart';
 
+import '../../common/core/module_cache.dart';
 import '../../common/request/dao/lesson_dao.dart';
 import '../../common/request/exception.dart';
 import '../../models/course_module_entity.dart';
@@ -24,6 +25,8 @@ class UnitBloc extends Bloc<UnitEvent, UnitState> {
   bool exchangeResult = false;
 
   UnitBloc(CourseModuleEntity? courseEntity) : super(UnitState().init()) {
+    ///缓存当前模块信息
+    setIfNotNull(courseEntity);
     on<RequestUnitDataEvent>(_requestUnitDatas);
     on<UnitInitEvent>((event, emit) {
       AudioPlayerUtil.getInstance().playAudio(AudioPlayerUtilType.inMyTummy);
@@ -35,6 +38,7 @@ class UnitBloc extends Bloc<UnitEvent, UnitState> {
     try {
       await loading(() async {
         _unitData = await LessonDao.courseUnit(event.moduleId);
+        setIfNull(_unitData);
         emitter(UnitDataLoadState());
       });
     } catch (e) {
@@ -44,6 +48,27 @@ class UnitBloc extends Bloc<UnitEvent, UnitState> {
     }
   }
 
+  ///如果从模块页选择回来，则刷新缓存，否则认为是从
+  void setIfNotNull(CourseModuleEntity? courseModuleEntity) {
+    if (courseModuleEntity != null) {
+      _moduleEntity = courseModuleEntity;
+    } else {
+      _moduleEntity = ModuleCache.instance.currentModule;
+    }
+  }
+
+  ///理论上只有没有缓存的情况下首次进入单元列表，数据请求成功后构建第一次缓存
+  void setIfNull(CourseUnitEntity? courseUnitData) {
+    if (_moduleEntity == null && courseUnitData != null) {
+      _moduleEntity = CourseModuleEntity.of(
+          courseUnitData.nowCourseModuleId,
+          courseUnitData.courseModuleCode,
+          courseUnitData.nowCourseModuleName,
+          courseUnitData.courseModuleThemeColor);
+      ModuleCache.instance.currentModule = _moduleEntity;
+    }
+  }
+
   String? getCourseModuleCode() {
     return _moduleEntity?.code ?? _unitData?.courseModuleCode;
   }
diff --git a/lib/pages/unit/widget/home_tab_header_widget.dart b/lib/pages/unit/widget/home_tab_header_widget.dart
index 4436510..dc6eede 100644
--- a/lib/pages/unit/widget/home_tab_header_widget.dart
+++ b/lib/pages/unit/widget/home_tab_header_widget.dart
@@ -5,7 +5,7 @@ import 'package:wow_english/common/extension/string_extension.dart';
 import 'package:wow_english/pages/user/bloc/user_bloc.dart';
 
 import '../../../common/core/app_config_helper.dart';
-import '../../section/courese_module_model.dart';
+import '../../../common/core/module_cache.dart';
 
 enum HeaderActionType {
   //视频跟读
@@ -35,7 +35,7 @@ class HomeTabHeaderWidget extends StatelessWidget {
         return Container(
             height: 45,
             width: double.infinity,
-            color: CourseModuleModel(courseModuleCode ?? 'Phase-1').color,
+            color: ModuleCache.instance.getCurrentThemeColor(),
             padding: EdgeInsets.symmetric(horizontal: 9.5.w),
             child: Row(
               children: [
@@ -60,8 +60,7 @@ class HomeTabHeaderWidget extends StatelessWidget {
                 20.horizontalSpace,
                 Expanded(
                     child: Text(
-                  CourseModuleModel(courseModuleCode ?? 'Phase-1')
-                      .courseModuleTitle,
+                      ModuleCache.instance.getCurrentThemeName(),
                   textAlign: TextAlign.left,
                   style: const TextStyle(color: Colors.white, fontSize: 30.0),
                 )),
diff --git a/lib/route/route.dart b/lib/route/route.dart
index 9f66df3..7cbc566 100644
--- a/lib/route/route.dart
+++ b/lib/route/route.dart
@@ -119,7 +119,7 @@ class AppRouter {
       case AppRouteName.courseModule:
         return CupertinoPageRoute(builder: (_) => const CourseModulePage());
       case AppRouteName.courseUnit:
-        CourseModuleEntity courseModuleEntity = CourseModuleEntity();
+        CourseModuleEntity? courseModuleEntity;
         if (settings.arguments != null) {
           courseModuleEntity = (settings.arguments as Map)
               .getOrNull('courseModuleEntity') as CourseModuleEntity;