底部源代码：
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>菜鸟教程(runoob.com)</title>
<style>
#divBottom{
width:100%;
margin:20px 0 0 0;
padding:45px 0;
text-align:center;
clear:both;
background:#111;
color:#686868;
}
#divBottom a{
color:#686868;
}
#BlogPowerBy{
font-size:.9em;
height:25px;
margin:0;
padding:0;
text-align:center;
font-weight:400
}
#BlogCopyRight{
font-size:.9em;
height:20px;
margin:0;
padding:0;
text-align:center;
font-weight:400
}
#BlogCopyRight a,#BlogPowerBy a{
color:#666
}
#BlogCopyRight a:hover,#BlogPowerBy a:hover{
color:#f66
}
</style>
</head>
<body>
<div id="divBottom">
<h4 id="BlogPowerBy">Powered By </h4>
<h3 id="BlogCopyRight">Copyright © 2015-2017 黑猫吧(www.heimaoba.cn) 赣ICP备17013174号-3</h3>
</div>
</body>
</html>
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