abstract：<!DOCTYPE html><html><head> <meta charset="UTF-8"> <link rel="shortcut icon" type="image/x-icon" href="https://img.alicdn.com/tps/i3/T1Oja
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<link rel="shortcut icon" type="image/x-icon" href="https://img.alicdn.com/tps/i3/T1OjaVFl4dXXa.JOZB-114-114.png">
<link rel="stylesheet" type="text/css" href="index.css">
<link href="https://cdn.bootcss.com/font-awesome/4.7.0/css/font-awesome.css" rel="stylesheet">
<title>淘宝网</title>
</head>
<body>
<div class="header">
<div class="header-content">
<div class="header-left">
<a href="" class="header_a">中国大陆 <i class="fa fa-chevron-down " ></i></a>
<a href="" style="color: #ff5000;">亲，请登陆</a>
<a href="">免费注册</a></li>
<a href="">手机逛淘宝</a>
</div>
<div class="header-right">
<a href="" class="header_a">我的淘宝 <i class="fa fa-chevron-down" ></i>
</a>
<a href="" class="header_a"><i class="fa fa-shopping-cart" style="color: #ff5000;" ></i> 购物车 <i class="fa fa-chevron-down" ></i></a>
<a href="" class="header_a">收藏夹 <i class="fa fa-chevron-down" ></i></a>
<a href="">商品分类</a>
<a href="" class="header_a">卖家中心 <i class="fa fa-chevron-down" ></i></a>
<a href="" class="header_a">联系客服 <i class="fa fa-chevron-down" ></i></a>
<a href="" class="header_a"><i class="fa fa-list-ul" style="color: #ff5000;"></i> 网站导航 <i class="fa fa-chevron-down" ></i></a>
</div>
</div>
</div>
</body>
</html>
index.css
*{margin: 0px;padding: 0px;}
a{text-decoration: none;}
li{list-style: none;}
.header{width: 100%;background: #c7c7c7;height: 40px;}
.header-content{width: 1200px;margin: 0px auto;height: 40px;}
.header-left{width: 350px;float: left;height: 40px;}
.header-right{float: right;height: 40px;}
.header a{color: #6c6c6c;margin-right: 5px;line-height: 40px;font-size: 11px;}
.header a:hover{color: #ff5000;}
.header_a{display: inline-block;width: 80px;text-align: center;}
.header_a ul{display: none; border: 1px solid #f5f5f5;}
.header_a:hover ul{display: block;}
Correcting teacher：天蓬老师Correction time：2019-01-24 08:59:34
Teacher's summary：*{margin: 0px;padding: 0px;}, 你的代码中用的标签并不多, 没有必要这样写, 可以直接指定标签名,如body {margin:0;padding:0}, 当值为0的时候,就不要加单位了
