// flex布局兼容写法 start .flex{display:-moz-flex;display:-ms-flexbox;display:flex}.flex-col,.flex_col{-ms-flex-direction:column;flex-direction:column}.flex-wrap,.flex_wrap{-ms-flex-wrap:wrap;-o-flex-wrap:wrap;flex-wrap:wrap}.justify-content-center,.justify_content_center{-ms-flex-pack:center;justify-content:center}.justify-content-between,.justify_content_between{-ms-flex-pack:justify;justify-content:space-between}.justify-content-end,.justify_content_end{-moz-justify-content:flex-end;-ms-flex-pack:end;justify-content:flex-end}.align-items-center,.align_items_center{-moz-align-items:center;-ms-align-items:center;-o-align-items:center;-ms-flex-align:center;align-items:center}.align-items-end,.align_items_end{-moz-align-items:end;-moz-align-items:flex-end;-ms-flex-align:end;align-items:flex-end}.align-items-baseline,.align_items_baseline{-moz-align-items:baseline;-ms-flex-align:baseline;align-items:baseline}.flex-1,.flex_1{-ms-flex:1;flex:1}.flex-2,.flex_2{-ms-flex:2;flex:2}.flex-3,.flex_3{-ms-flex:3;flex:3}.align-self-start,// 子元素侧轴的自身对齐方式 .align_self_start{-ms-flex-item-align:start;align-self:flex-start}.align-self-center,.align_self_center{-ms-flex-item-align:center;-ms-grid-row-align:center;align-self:center;margin:0 auto}.align-slef-end,.align_self_end{-ms-flex-item-align:end;align-self:flex-end}.order-1,.order_1{-moz-order:1;-ms-flex-order:1;order:1}.order-2,.order_2{-ms-flex-order:2;order:2}.order-3,.order_3{-ms-flex-order:3;order:3}