修改

src/views/layout/components/Sidebar/SidebarItem.vue

   .el-submenu__title{
     background-color:#1F2D3D !important;
     color: #fff !important;
+    height: 32px !important;
+    line-height: 32px !important;
   }
   .router-link-exact-active{
     color: rgb(64, 158, 255) !important;

src/views/layout/components/Sidebar/index.vue

     background-color: #1F2D3D !important;
   }
   .el-menu-item{
-    height: 36px !important;
-    line-height: 36px !important;
+    height: 32px !important;
+    line-height: 32px !important;
     background-color: #1F2D3D !important;
     color: #fff !important;
     i{