bugfix：BOM清单展开加背景色

src/views/modules/tech/product-management.vue

@@ -758,7 +758,7 @@ export default {
 </script>
 
 <style scoped lang="scss">
-/deep/ .product-management  .el-table__row--level-1{
+/deep/ .product-management  .el-table__row--level-1 > td{
   background-color: #c1c9d244;
 }
 </style>