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diff --git a/public/images/teacher/路径（4）.png b/public/images/teacher/路径（4）.png
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index 0000000..5cb70ed
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diff --git a/public/images/teacher/路径（5）.png b/public/images/teacher/路径（5）.png
new file mode 100644
index 0000000..8c4375f
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diff --git a/public/images/teacher/顶部.png b/public/images/teacher/顶部.png
new file mode 100644
index 0000000..854542b
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diff --git a/public/images/teacher/题库(1).png.png b/public/images/teacher/题库(1).png.png
new file mode 100644
index 0000000..f8570a2
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diff --git a/src/components/admin/CourseComponents/CourseCategory.vue b/src/components/admin/CourseComponents/CourseCategory.vue
index 6d521f6..91abefa 100644
--- a/src/components/admin/CourseComponents/CourseCategory.vue
+++ b/src/components/admin/CourseComponents/CourseCategory.vue
@@ -28,10 +28,10 @@
                     <div class="more-options">
                       <span class="more-icon">⋮</span>
                       <div class="options-menu">
-                        <a href="#" class="option-item"><img src="/public/images/teacher/+.png" alt="">编辑</a>
-                        <a href="#" class="option-item"><img src="/public/images/teacher/+.png" alt="">查看</a>
-                        <a href="#" class="option-item"><img src="/public/images/teacher/+.png" alt="">删除</a>
-                        <a href="#" class="option-item"><img src="/public/images/teacher/+.png" alt="">更多</a>
+                        <a href="#" class="option-item"><img src="/images/teacher/+.png" alt="">编辑</a>
+                        <a href="#" class="option-item"><img src="/images/teacher/+.png" alt="">查看</a>
+                        <a href="#" class="option-item"><img src="/images/teacher/+.png" alt="">删除</a>
+                        <a href="#" class="option-item"><img src="/images/teacher/+.png" alt="">更多</a>
                       </div>
                     </div>
                 </div>
diff --git a/src/components/admin/CourseManagement.vue b/src/components/admin/CourseManagement.vue
index 661d5ff..d828f79 100644
--- a/src/components/admin/CourseManagement.vue
+++ b/src/components/admin/CourseManagement.vue
@@ -5,37 +5,34 @@
             <router-link to="/teacher/course-management" class="nav-item">
                 <span>全部课程</span><i>(10)</i>
                 <div class="icon-container">
-                    <span class="icon icon-status"></span>
-                    <span class="icon icon-status"></span>
-                    <span class="icon icon-status"></span>
+                    <span class="icon icon-status icon-add"></span>
+                    <span class="icon icon-status icon-edit"></span>
+                    <span class="icon icon-status icon-delete"></span>
                 </div>
             </router-link>
             <div class="sub-nav-container">
                 <router-link to="/teacher/course-management/course-category" class="nav-item">
                     <span>课程分类</span>
                     <div class="icon-container">
-                        <span class="icon icon-status"></span>
-                        <span class="icon icon-status"></span>
-                        <span class="icon icon-status"></span>
+                        <span class="icon icon-status icon-add"></span>
+                        <span class="icon icon-status icon-edit"></span>
+                        <span class="icon icon-status icon-delete"></span>
                     </div>
                 </router-link>
                 <router-link to="/teacher/course-management/material-category" class="nav-item">
-
                     <span>资料分类</span>
                     <div class="icon-container">
-                        <span class="icon icon-status"></span>
-                        <span class="icon icon-status"></span>
-                        <span class="icon icon-status"></span>
+                        <span class="icon icon-status icon-add"></span>
+                        <span class="icon icon-status icon-edit"></span>
+                        <span class="icon icon-status icon-delete"></span>
                     </div>
                 </router-link>
                 <router-link to="/teacher/course-management/course-analysis" class="nav-item">
-
                     <span>课程分析</span>
                     <div class="icon-container">
-                        <span class="icon icon-status"></span>
-                        <span class="icon icon-status"></span>
-                        <span class="icon icon-status"></span>
-
+                        <span class="icon icon-status icon-add"></span>
+                        <span class="icon icon-status icon-edit"></span>
+                        <span class="icon icon-status icon-delete"></span>
                     </div>
                 </router-link>
             </div>
@@ -95,16 +92,37 @@
 .icon.icon-status{
     width: 16px;
     height: 16px;
-    background-image: url('../../../public/images/icon/top.jpg'); 
     background-size: contain;
     background-repeat: no-repeat;
     background-position: center;
     display: inline-block;
     margin-left: 8px;
     opacity: 0;
-    transition: opacity 0.3s ease;
+    transition: opacity 0.3s ease, background-image 0.3s ease;
 }
-.nav-item:hover .icon.icon-status{
+/* 加号图标 */
+.icon.icon-add {
+    background-image: url('/images/teacher/加号.png');
+}
+/* 编辑图标 */
+.icon.icon-edit {
+    background-image: url('/images/teacher/编辑.png');
+}
+/* 删除图标 */
+.icon.icon-delete {
+    background-image: url('/images/teacher/删除.png');
+}
+/* 鼠标悬停时各自切换为对应的选中图标 */
+.nav-item:hover .icon.icon-add {
+    background-image: url('/images/teacher/加号(选中).png');
+    opacity: 1;
+}
+.nav-item:hover .icon.icon-edit {
+    background-image: url('/images/teacher/编辑(选中).png');
+    opacity: 1;
+}
+.nav-item:hover .icon.icon-delete {
+    background-image: url('/images/teacher/删除(选中).png');
     opacity: 1;
 }
 .content-container{
diff --git a/src/router/index.ts b/src/router/index.ts
index ac21dd4..d90a298 100644
--- a/src/router/index.ts
+++ b/src/router/index.ts
@@ -48,6 +48,7 @@ const routes: RouteRecordRaw[] = [
       title: '管理后台',
       requiresAuth: true
     },
+    redirect: '/teacher/personal-center',  // 添加默认重定向
     children: [
       {
         path: 'personal-center',
@@ -58,13 +59,14 @@ const routes: RouteRecordRaw[] = [
         }
       },
       {
-        path: 'course-management',
-        name: 'CourseManagement',
-        component: CourseManagement,
-        meta: {
-          title: '课程管理'
-        },
-        children: [
+            path: 'course-management',
+            name: 'CourseManagement',
+            component: CourseManagement,
+            meta: {
+              title: '课程管理'
+            },
+            redirect: '/teacher/course-management/course-category',  // 添加默认重定向
+            children: [
           {
             path: 'course-category',
             name: 'CourseCategory',
diff --git a/src/views/teacher/AdminDashboard.vue b/src/views/teacher/AdminDashboard.vue
index b63a711..a19a061 100644
--- a/src/views/teacher/AdminDashboard.vue
+++ b/src/views/teacher/AdminDashboard.vue
@@ -2,7 +2,8 @@
   <div class="admin-dashboard">
     <!-- 顶部图片 -->
      <div class="top-image-container">
-        <img src="https://picsum.photos/500/200" alt="顶部图片" class="top-image">
+        <img src="/images/teacher/顶部.png" alt="顶部图片" class="top-image">
+
      </div>
 
     <div class="main-content">
@@ -33,7 +34,7 @@
               </router-link>
               <router-link to="/teacher/personal-center" class="nav-item" :class="{ active: activeNavItem === 3 }" @click="setActiveNavItem(3)">
 
-                  <img src="https://picsum.photos/200/200" alt="">
+                  <img src="/images/teacher/个人中心.png" alt="">
                   <span>个人中心</span>
               </router-link>
             </div>
@@ -127,7 +128,7 @@ const updateActiveNavItem = () => {
   height: 130px;
   position: absolute;
   left: 0px;
-  top: 70px;
+  /* top: 20px; */
   opacity: 100%;
   object-fit: cover;
 }