<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>多列等分布局使用float</title>
<!-- 百分比 box-sizing为border-box:padding和border都被计算到width里面 -->
<style type="text/css">
*{
margin: 0;
padding: 0;
}
html,body{
height: 100%;
width: 100%;
}
.parent{
/* margin-left: -20px; */
height: 100%;
width: 100%;
background-color: black;
}
.column{
float: left;
width: 33.33%;
height: 100%;
/* padding-left: 20px; */
box-sizing: border-box;
}
</style>
</head>
<body>
<div class="parent">
<div class="column" style="background-color:red;">
first
</div>
<div class="column" style="background-color: yellow;">
second
</div>
<div class="column" style="background-color: green;">
third
</div>
<!-- <div class="column" style="background-color: #0000FF;">
four
</div> -->
</div>
</body>
</html>