IE 11才完全支持flex布局方案，在IE 10的CSS中可使用-ms-前缀支持部分flex布局
.parent{
display: flex; //inline-flex
}
.item{
flex-basis: 30%
}
1.display: flex | inline-flex
2.flex-dection:row | row-reverse | colume | colume-reverse
3.flex-wrap:nowrap (不换行)| wrap | wrap-reverse
4.flex-flow: flex-direction flex-wrap;
5.item对齐方式：just-cntent align-items align-content
just-cntent:flex-start flex-end center space-between spacce around space-evenly
