修改样式

public/static/theme/css/_layout.less

@@ -184,16 +184,16 @@
         width: 100%;
         height: 100%;
         display: block;
-        content: "\e65b";
-        line-height: 30px;
+        content: "\e602";
         text-align: center;
+        line-height: 30px;
         transform: rotate(180deg);
         #iconLayout(10px);
       }
 
       top: 50%;
       color: #fff;
-      right: -5px;
+      right: -2px;
       width: 15px;
       height: 30px;
       z-index: 334;