| // .u-flex {  | 
| //     @include vue-flex(row);  | 
| // }  | 
|   | 
| // .u-flex-x {  | 
| //     @include vue-flex(row);  | 
| // }  | 
|   | 
| // .u-flex-y {  | 
| //     @include vue-flex(column);  | 
| // }  | 
|   | 
| // .u-flex-xy-center {  | 
| //     @include vue-flex(row);  | 
| //     justify-content: center;  | 
| //     align-items: center;  | 
| // }  | 
|   | 
| // .u-flex-x-center {  | 
| //     @include vue-flex(row);  | 
| //     justify-content: center;  | 
| // }  | 
|   | 
| // .u-flex-y-center {  | 
| //     @include vue-flex(column);  | 
| //     justify-content: center;  | 
| // }  | 
|   | 
|   | 
| // flex布局  | 
| .u-flex,  | 
| .u-flex-row,  | 
| .u-flex-x {  | 
|     @include flex;  | 
| }  | 
|   | 
| .u-flex-y,  | 
| .u-flex-column {  | 
|     @include flex(column);  | 
| }  | 
|   | 
| .u-flex-x-center {  | 
|     @include flex;  | 
|     justify-content: center;  | 
| }  | 
|   | 
| .u-flex-xy-center {  | 
|     @include flex;  | 
|     justify-content: center;  | 
|     align-items: center;  | 
| }  | 
|   | 
| .u-flex-y-center {  | 
|     @include flex;  | 
|     align-items: center;  | 
| }  | 
|   | 
| .u-flex-x-left {  | 
|     @include flex;  | 
| }  | 
|   | 
| .u-flex-x-reverse,  | 
| .u-flex-row-reverse {  | 
|     flex-direction: row-reverse;  | 
| }  | 
|   | 
| .u-flex-y-reverse,  | 
| .u-flex-column-reverse {  | 
|     flex-direction: column-reverse;  | 
| }  | 
|   | 
| /* #ifndef APP-NVUE */  | 
| // 此处为vue版本的简写,因为nvue不支持同时作用于两个类名的样式写法  | 
| // nvue下只能写成class="u-flex-x u-flex-x-reverse的形式"  | 
| .u-flex.u-flex-reverse,  | 
| .u-flex-row.u-flex-reverse,  | 
| .u-flex-x.u-flex-reverse {  | 
|     flex-direction: row-reverse;  | 
| }  | 
|   | 
| .u-flex-column.u-flex-reverse,  | 
| .u-flex-y.u-flex-reverse {  | 
|     flex-direction: column-reverse;  | 
| }  | 
|   | 
| // 自动伸缩  | 
| .u-flex-fill {  | 
|     flex: 1 1 auto  | 
| }  | 
|   | 
| // 边界自动伸缩  | 
| .u-margin-top-auto,  | 
| .u-m-t-auto {  | 
|     margin-top: auto !important  | 
| }  | 
|   | 
| .u-margin-right-auto,  | 
| .u-m-r-auto {  | 
|     margin-right: auto !important  | 
| }  | 
|   | 
| .u-margin-bottom-auto,  | 
| .u-m-b-auto {  | 
|     margin-bottom: auto !important  | 
| }  | 
|   | 
| .u-margin-left-auto,  | 
| .u-m-l-auto {  | 
|     margin-left: auto !important  | 
| }  | 
|   | 
| .u-margin-center-auto,  | 
| .u-m-c-auto {  | 
|     margin-left: auto !important;  | 
|     margin-right: auto !important  | 
| }  | 
|   | 
| .u-margin-middle-auto,  | 
| .u-m-m-auto {  | 
|     margin-top: auto !important;  | 
|     margin-bottom: auto !important  | 
| }  | 
| /* #endif */  | 
|   | 
| // 换行  | 
| .u-flex-wrap {  | 
|     flex-wrap: wrap;  | 
| }  | 
|   | 
| // 反向换行  | 
| .u-flex-wrap-reverse {  | 
|     flex-wrap: wrap-reverse;  | 
| }  | 
|   | 
| // 主轴起点对齐  | 
| .u-flex-start {  | 
|     justify-content: flex-start  | 
| }  | 
|   | 
| // 主轴中间对齐  | 
| .u-flex-center {  | 
|     justify-content: center  | 
| }  | 
|   | 
| // 主轴终点对齐  | 
| .u-flex-end {  | 
|     justify-content: flex-end  | 
| }  | 
|   | 
| // 主轴等比间距  | 
| .u-flex-between {  | 
|     justify-content: space-between  | 
| }  | 
|   | 
| // 主轴均分间距  | 
| .u-flex-around {  | 
|     justify-content: space-around  | 
| }  | 
|   | 
| // 交叉轴起点对齐  | 
| .u-flex-items-start {  | 
|     align-items: flex-start  | 
| }  | 
|   | 
| // 交叉轴中间对齐  | 
| .u-flex-items-center {  | 
|     align-items: center  | 
| }  | 
|   | 
| // 交叉轴终点对齐  | 
| .u-flex-items-end {  | 
|     align-items: flex-end  | 
| }  | 
|   | 
| // 交叉轴第一行文字基线对齐  | 
| .u-flex-items-baseline {  | 
|     align-items: baseline  | 
| }  | 
|   | 
| // 交叉轴方向拉伸对齐  | 
| .u-flex-items-stretch {  | 
|     align-items: stretch  | 
| }  | 
|   | 
|   | 
| // 以下属于项目(子元素)的类  | 
|   | 
| // 子元素交叉轴起点对齐  | 
| .u-flex-self-start {  | 
|     align-self: flex-start  | 
| }  | 
|   | 
| // 子元素交叉轴居中对齐  | 
| .u-flex-self-center {  | 
|     align-self: center  | 
| }  | 
|   | 
| // 子元素交叉轴终点对齐  | 
| .u-flex-self-end {  | 
|     align-self: flex-end  | 
| }  | 
|   | 
| // 子元素交叉轴第一行文字基线对齐  | 
| .u-flex-self-baseline {  | 
|     align-self: baseline  | 
| }  | 
|   | 
| // 子元素交叉轴方向拉伸对齐  | 
| .u-flex-self-stretch {  | 
|     align-self: stretch  | 
| }  | 
|   | 
| // 多轴交叉时的对齐方式  | 
|   | 
| // 起点对齐  | 
| .u-flex-content-start {  | 
|     align-content: flex-start  | 
| }  | 
|   | 
| // 居中对齐  | 
| .u-flex-content-center {  | 
|     align-content: center  | 
| }  | 
|   | 
| // 终点对齐  | 
| .u-flex-content-end {  | 
|     align-content: flex-end  | 
| }  | 
|   | 
| // 两端对齐  | 
| .u-flex-content-between {  | 
|     align-content: space-between  | 
| }  | 
|   | 
| // 均分间距  | 
| .u-flex-content-around {  | 
|     align-content: space-around  | 
| }  | 
|   | 
| // 全部居中对齐  | 
| .u-flex-middle {  | 
|     justify-content: center;  | 
|     align-items: center;  | 
|     align-self: center;  | 
|     align-content: center  | 
| }  | 
|   | 
| // 是否可以放大  | 
| .u-flex-grow {  | 
|     flex-grow: 1  | 
| }  | 
|   | 
| // 是否可以缩小  | 
| .u-flex-shrink {  | 
|     flex-shrink: 1  | 
| }  | 
|   |