methods：
columnStyle({ row, column, rowIndex, columnIndex }) {
if (columnIndex == 4) {
return "borderLeft:1px solid #EBEEF5;paddingLeft:10px;";
}
},
/deep/ .el-table{overflow: unset}
/deep/ .el-table__body-wrapper{overflow: unset}
/deep/ .el-table .cell{overflow: unset}
/deep/ .el-table td {
position:static;
}