diff --git a/reading-platform-frontend/src/api/course.ts b/reading-platform-frontend/src/api/course.ts
index 8da045b..8395e3a 100644
--- a/reading-platform-frontend/src/api/course.ts
+++ b/reading-platform-frontend/src/api/course.ts
@@ -157,9 +157,9 @@ export function getReviewList(params: CourseQueryParams): Promise<{
   return api.getCoursePage1(toFindAllParams({ ...params, reviewOnly: true })).then(normalizePageResult) as any;
 }
 
-// 获取课程包详情
-export function getCourse(id: number): Promise<any> {
-  return api.getCourse1(id) as any;
+// 获取课程包详情（id 支持 number | string，避免大整数精度丢失）
+export function getCourse(id: number | string): Promise<any> {
+  return api.getCourse1(id as number) as any;
 }
 
 // 创建课程包
@@ -168,13 +168,13 @@ export function createCourse(data: any): Promise<any> {
 }
 
 // 更新课程包
-export function updateCourse(id: number, data: any): Promise<any> {
-  return api.updateCourse(id, data) as any;
+export function updateCourse(id: number | string, data: any): Promise<any> {
+  return api.updateCourse(id as number, data) as any;
 }
 
 // 删除课程包
-export function deleteCourse(id: number): Promise<any> {
-  return api.deleteCourse(id) as any;
+export function deleteCourse(id: number | string): Promise<any> {
+  return api.deleteCourse(id as number) as any;
 }
 
 // 验证课程完整性 (暂时返回 true，后端可能没有此接口)
@@ -229,7 +229,7 @@ export function republishCourse(id: number): Promise<any> {
 }
 
 // 获取课程包统计数据 (暂时返回空对象)
-export function getCourseStats(id: number): Promise<any> {
+export function getCourseStats(id: number | string): Promise<any> {
   return Promise.resolve({});
 }
 
diff --git a/reading-platform-frontend/src/views/admin/courses/CourseDetailView.vue b/reading-platform-frontend/src/views/admin/courses/CourseDetailView.vue
index 7f23d1d..966dd4b 100644
--- a/reading-platform-frontend/src/views/admin/courses/CourseDetailView.vue
+++ b/reading-platform-frontend/src/views/admin/courses/CourseDetailView.vue
@@ -760,7 +760,7 @@ const viewStats = () => {
 
 const deleteCourse = async () => {
   try {
-    await courseApi.deleteCourse(+route.params.id);
+    await courseApi.deleteCourse(route.params.id as string);
     message.success('删除成功');
     router.push('/admin/courses');
   } catch (error) {
@@ -781,7 +781,7 @@ onMounted(async () => {
 const fetchCourseDetail = async () => {
   loading.value = true;
   try {
-    const courseId = +route.params.id;
+    const courseId = route.params.id as string;
     const data = await courseApi.getCourse(courseId);
     course.value = data;
 
diff --git a/reading-platform-frontend/src/views/admin/courses/CourseEditView.vue b/reading-platform-frontend/src/views/admin/courses/CourseEditView.vue
index ae4a484..9e9c6fe 100644
--- a/reading-platform-frontend/src/views/admin/courses/CourseEditView.vue
+++ b/reading-platform-frontend/src/views/admin/courses/CourseEditView.vue
@@ -137,7 +137,7 @@ const router = useRouter();
 const route = useRoute();
 
 const isEdit = computed(() => !!route.params.id);
-const courseId = computed(() => Number(route.params.id));
+const courseId = computed(() => route.params.id as string | undefined);
 
 const loading = ref(false);
 const saving = ref(false);
diff --git a/reading-platform-frontend/src/views/admin/courses/CourseListView.vue b/reading-platform-frontend/src/views/admin/courses/CourseListView.vue
index 65a0074..a0eec06 100644
--- a/reading-platform-frontend/src/views/admin/courses/CourseListView.vue
+++ b/reading-platform-frontend/src/views/admin/courses/CourseListView.vue
@@ -274,19 +274,19 @@ const handleTableChange = (pag: any) => {
   fetchCourses();
 };
 
-const viewCourse = (id: number) => {
+const viewCourse = (id: number | string) => {
   router.push(`/admin/courses/${id}`);
 };
 
-const editCourse = (id: number) => {
+const editCourse = (id: number | string) => {
   router.push(`/admin/courses/${id}/edit`);
 };
 
-const viewStats = (id: number) => {
+const viewStats = (id: number | string) => {
   router.push(`/admin/courses/${id}/stats`);
 };
 
-const deleteCourseHandler = async (id: number) => {
+const deleteCourseHandler = async (id: number | string) => {
   try {
     await courseApi.deleteCourse(id);
     message.success('删除成功');
diff --git a/reading-platform-frontend/src/views/admin/courses/CourseStatsView.vue b/reading-platform-frontend/src/views/admin/courses/CourseStatsView.vue
index 81adb6d..67398e1 100644
--- a/reading-platform-frontend/src/views/admin/courses/CourseStatsView.vue
+++ b/reading-platform-frontend/src/views/admin/courses/CourseStatsView.vue
@@ -252,7 +252,7 @@ onMounted(async () => {
 const fetchCourseStats = async () => {
   loading.value = true;
   try {
-    const courseId = +route.params.id;
+    const courseId = route.params.id as string;
 
     // 获取统计数据
     const statsData = await courseApi.getCourseStats(courseId);