1. css代码

.flexColumn(@columns, @gutterSize) {display: flex;flex-flow: row wrap;margin: calc(@gutterSize / -2);> div {flex: 0 0 calc(100% / @columns);padding: calc(@gutterSize / 2);box-sizing: border-box;}
}

2.用法

.grid-show-item3 {width: 100%;display: flex;flex-flow: row wrap;margin: calc(8px / -2);.flexColumn(3, 14px);
}.grid-show-item2 {width: 100%;display: flex;flex-flow: row wrap;margin: calc(8px / -2);.flexColumn(2, 14px);
}.grid-show-item4 {width: 100%;display: flex;flex-flow: row wrap;margin: calc(8px / -2);.flexColumn(4, 14px);
}

3. 效果