<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
<meta name="viewport" content="width=device-width,initial-scale=1.0,maximum-scale=1.0,minimum-scale=1.0,user-scalable=no">
<style>
.main-content {
position: relative;
overflow: hidden;
color: #fff;
}
.clearfix {
display: inline-block
}
.clearfix:after {
display: block;
content: ".";
height: 0;
line-height: 0;
clear: both;
visibility: hidden
}
.detail {
position: fixed;
width: 100%;
height: 100%;
z-index: 100;
overflow: auto;
top: 0;
left: 0;
background: rgba(0, 0, 0, 0.4);
}
.detail-wrapper {
width: 100%;
min-height: 100%;
}
.detail-close {
position: relative;
width: 32px;
height: 32px;
margin: -64px auto 0 auto;
clear: both;
font-size: 32px;
}
.detail-main {
/*margin-top: 64px;*/
padding-bottom: 64px;
}
</style>
</head>
<body>
<div class="main-content">
<div class="detail">
<div class="detail-wrapper clearfix">
<div class="detail-main">
<p>hello every body</p>
<p>hello every body</p>
<p>hello every body</p>
</div>
</div>
<div class="detail-close">
<i>x</i>
</div>
</div>
</div>
</body>
</html>
原文：http://www.cnblogs.com/zerohu/p/6863856.html