diff --git a/public/react/src/modules/courses/css/Courses.css b/public/react/src/modules/courses/css/Courses.css
index 72ea16378..45c7f00af 100644
--- a/public/react/src/modules/courses/css/Courses.css
+++ b/public/react/src/modules/courses/css/Courses.css
@@ -1221,7 +1221,7 @@ samp {
   }
   
   /* 毕设任务 */
-  .graduationTaskMenu a{
+  .graduationTaskMenu>a{
       display: block;
       position: relative;
       line-height: 72px;
@@ -1229,7 +1229,7 @@ samp {
       margin-right: 30px;
       float: left;
   }
-  .graduationTaskMenu a.active:after{
+  .graduationTaskMenu>a.active:after{
       position: absolute;
       left: 0px;
       height: 2px;
@@ -1239,7 +1239,7 @@ samp {
       bottom: 0px;
       font-weight:400;
   }
-  .graduationTaskMenu a.active{
+  .graduationTaskMenu>a.active{
       color: #4CACFF!important;
   }