* display：flex * 注意，设为 Flex 布局以后，子元素的float、clear和vertical-align属性将失效 ~~~ 基本属性 flex-direction row | row-reverse | column | column-reverse; flex-wrap nowrap | wrap | wrap-reverse是否换行 flex-flow 是flex-direction属性和flex-wrap属性的简写形式，默认值为row nowrap justify-content justify-content: flex-start | flex-end | center | space-between | space-around; align-items align-items: flex-start | flex-end | center | baseline | stretch; align-content align-content: flex-start | flex-end | center | space-between | space-around | stretch; ~~~ * 看阮一峰