［修改］

src/layouts/HomeLayout/HomeHeader/index.vue

@@ -1,5 +1,5 @@
 <template>
-  <nav class="navbar nav-section" style="position: sticky;top: 0px;">
+  <nav class="navbar nav-section">
     <div class="container">
       <div class="navbar-brand">
         <a class="navbar-item header-logo"> MOOC </a>

src/layouts/courseLayouts/LayoutStructure.vue

@@ -61,9 +61,7 @@ $top-section-height: 4.25rem;
   display: flex;
   min-height: 100vh;
   justify-content: stretch;
-  position: fixed;
-  top: 0px;
-  z-index: 99;
+  position: relative;
 }
 
 .router-section {