<!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>
/* 浮动的标签 顶对齐 */
/* 浮动: 在一行排列, 宽高生效 -- 浮动后的标签具备行内块特点 */
.one {
width: 100px;
height: 100px;
background-color: pink;
float: left;
margin-top: 50px;
}
.two {
width: 200px;
height: 200px;
background-color: skyblue;
float: left;
/* 因为有浮动, 不能生效 - 盒子无法水平居中 */
margin: 0 auto;
}
.three {
width: 300px;
height: 300px;
background-color: orange;
}
</style>
</head>
<body>
<div class="one">one</div>
<div class="two">two</div>
<div class="three">three</div>
</body>
</html>
运行结果
