diff --git a/src/renderer/src/store/modules/tool.js b/src/renderer/src/store/modules/tool.js
index 9ec7d55..a07b10e 100644
--- a/src/renderer/src/store/modules/tool.js
+++ b/src/renderer/src/store/modules/tool.js
@@ -9,6 +9,7 @@ export const useToolState = defineStore('tool', {
     showBoardAll: false,    // 全屏画板-是否显示
     isPdfWin: false,        // pdf窗口是否打开
     isToolWin: false,       // 工具窗口是否打开
+    curSubjectNode: {}      // 当前教材节点 （包含当前教材 单元）
   }),
   actions: {
   }
diff --git a/src/renderer/src/views/tool/components/lesson.vue b/src/renderer/src/views/tool/components/lesson.vue
index b8c5c71..87f65f1 100644
--- a/src/renderer/src/views/tool/components/lesson.vue
+++ b/src/renderer/src/views/tool/components/lesson.vue
@@ -126,4 +126,16 @@ onMounted(()=>{
 })
 </script>
 
-<style lang="scss" scoped></style>
\ No newline at end of file
+<style lang="scss" scoped>
+:deep(.el-tree-node) {
+  .el-tree-node__content {
+    height: 45px;
+    border-radius: 10px;
+    color: #EFEFEF;
+    //#368FFF
+    &:hover {
+      background-color: #272728;
+    }
+  }
+}
+</style>
\ No newline at end of file