.co-transfer{ height: 100%; display: flex; flex-direction: row;

    // 中间按钮垂直居中
    .el-transfer__buttons{ align-self: center; }
    
    .el-button{ display: block;
        &+.el-button{ margin-left:0;}
    }
    
    .el-transfer-panel{ flex:auto; display: flex; flex-direction: column;
        .el-transfer-panel__body{ flex:auto; display: flex; flex-direction: column;
            .el-transfer-panel__list{ flex: auto;}
        }
    }
}