| // .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 | 
| } |