表格某一列内容需要占据两列宽度，如何设置样式以及只给某一列添加边框

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;

    }