.el-table, .el-table__expanded-cell {
        background-color: transparent!important;
    }
    
    .el-table th, .el-table tr {
       border: 0!important;
        background-color: transparent!important;
    }
    .header_time >>> .el-table,
.header_time >>> .el-table__expanded-cell {
  background-color: transparent !important;
}

.header_time >>> .el-table th,
.header_time >>> .el-table tr {
  border: 0 !important;
  background-color: transparent !important;
}