这样就可以用
p.<class名>{
color:red
}检测
如果没能帮到你很抱歉，我也许学艺不精哈
<!doctype html><html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
<style>
body{
margin:0
}
.stage{
position:relative
}
.left{
position:absolute
left:0
top:0
background-color:green
width:200px
height:500px
}
.center{
margin-left:200px
background-color:orange
height:500px
}
</style>
</head>
<body>
<div class="stage">
<div class="left"></div>
<div class="center"></div>
</div>
</body>
</html>
