样式优化

src/components/framework/leftMenu.vue

@@ -64,11 +64,28 @@
     &.el-menu {
       overflow-x: hidden;
       overflow-y: auto;
+      overflow-y: scroll;
       box-sizing: border-box;
       height: 100%;
       background: @bg-b;
       color: white;
 
+      &::-webkit-scrollbar {
+        background-color: #333333; /* or add it to the track */
+        &:hover {
+          &::-webkit-scrollbar-thumb {
+            background-color: #999;
+          }
+        }
+      }
+
+      &::-webkit-scrollbar-thumb {
+        background-clip: padding-box;
+        border: solid 3px transparent;
+        border-radius: 6px;
+        background-color: #C1C1C1;
+      }
+
       .menu-btn {
         width: 100%;
         height: 35px;