针对vxe表格固定列背景透明问题

cpp-ui/src/assets/styles/dark.scss

@@ -142,6 +142,10 @@ $table-header-background-color: #284266;
 }
 .vxe-table--render-default.border--full .vxe-table--fixed-left-wrapper {
   border-right: 1px solid $table-border-color !important;
+  background-image: url('../images/pageBg.png');
+  background-size: cover;
+  background-position: center;
+  background-repeat: no-repeat;
 }
 /*element表格*/
 .el-table, .el-table tr {