style:弹窗样式修改

 <!--
  * @Description: 
  * @Autor: renchao
- * @LastEditTime: 2023-07-25 16:08:30
+ * @LastEditTime: 2023-08-03 14:50:08
 -->
 <template>
   <transition name="msgbox-fade">
@@ -136,7 +136,6 @@
   }
 
   .ls-mask-window {
-    background: white;
     position: relative;
     left: 50%;
     top: 50%;
@@ -162,6 +161,7 @@
   }
 
   .mask-content {
+    background: #ffffff;
     padding: 20px;
     width: 100%;
     min-height: 30%;