fix: 调整滚动条样式问题

src/global/styles/global.less

@@ -48,7 +48,7 @@ a {
 ::-webkit-scrollbar {
   height: 8px;
   width: 6px;
-  background: transparent;
+  background: #f0f2f5;
   border-radius: 5px;
 }
 
@@ -59,7 +59,7 @@ a {
 ::-webkit-scrollbar-thumb {
   width: 8px;
   min-height: 15px;
-  background: transparent;
+  background: rgba(0,0,0,.2);
   border-radius: 5px;
 }
 

src/layouts/styles/MenuSlider.less

@@ -243,7 +243,23 @@
     text-align: center;
     overflow-y: scroll;
     list-style: none;
+    &::-webkit-scrollbar {
+      height: 8px;
+      width: 6px;
+      background: transparent;
+      border-radius: 5px;
+    }
+
+    &::-webkit-scrollbar-button {
+      display: none;
+    }
 
+    &::-webkit-scrollbar-thumb {
+      width: 8px;
+      min-height: 15px;
+      background: transparent;
+      border-radius: 5px;
+    }
     li {
       padding: 8px 0;
       position: relative;