- 开启flex元素的叫：flex-contianer
- flex-contianer中的子元素叫：flex-items
开启flex属性
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<style>
#box{
/* 开启flex布局：块元素 */
display: flex;
/* 开启flex布局；行元素 */
/* display: inline-flex; */
background-color: red;
500px;
/* 水平居中 */
margin: 0 auto;
/* row: 默认值从main start -> main end
row-reverse: 反转 从右到左
column : 从上倒下
column-reverse: 从下到上
*/
flex-direction: column-reverse;
}
.item{
text-align: center;
line-height: 100px;
100px;
}
.item1{
background-color: azure;
}
.item2{
background-color: green;
}
.item3{
background-color: gold;
}
</style>
</head>
<body>
<div id="box">
<div class="item item1">item1</div>
<div class="item item2">item2</div>
<div class="item item3">item3</div>
</div>
<strong>行类元素</strong>
</body>
</html>
flex布局模型主轴/交叉轴
