HTML CODE:
HTML5示例style.css：
header,nav,section,footer{width:1000px;margin:0 auto 10px auto; text-align:center;}
header{height:100px; background:#a5d3d5}
nav{ height:40px; background:#8ecaef}
nav li{list-style:none}
section{min-height:300px;}
aside{ float:left; min-height:300px;width:300px; background:#dcaace}
article{ float:right; min-height:300px;width:700px; background:#E6F2FF}
footer{ height:80px; background:#daebf5;}
