头部应该怎么写

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title></title>
<link rel="stylesheet" type="text/css" href="css/tou.css"/>
</head>
<body>
<div class="head">
<div class="line1">
<span class="log"><img src="img/logo/yinLogo.png" ></span>
<ul>
<li><a href="#">购物须知</a></li>
<li><a href="#">购物须知</a></li>
<li><a href="reading.html">购物须知</a></li>
</ul>
</div>

<div class="line2">
<span class="log"><img src="img/logo/shop-logo-v1.png" ></span>
<div>
<input type="text" class="search">
<span class="btn"></span>
</div>
<ul>
<li><img class="login" src="img/icon/avatar.png"></img><a href="">登录</a></li>
<li><a href="#">我的订单</a></li>
<li><img class="cart" src="img/icon/cart-logo-v1.png"></img><a href="#">购物车</a></li>
</ul>
</div>
<hr />
<div class="line3">
<span class="title"><a href="">艺人分类</a></span>
<ul>
<li><a class="active" href="#">首页</a></li>
<li><a href="#">明星周边</a></li>
<li><a href="#">明星周边</a></li>
<li><a href="#">明星周边</a></li>
<li><a href="#">明星周边</a></li>
<li><a href="#">明星周边</a></li>
<li><a href="#">明星周边</a></li>
<li><a href="#">明星周边</a></li>
</ul>
</div>

</div>
</body>
</html>

 

css代码

body{
margin: 0;
}
.head{
background-color: #333333;
}
.head ul{
padding-left: 0;
}
.head ul li{
display: inline-block;
}
.head a{
text-decoration: none;
color: #ccc;
display: block; /* 转为块级元素 */
}
.head .line1{
background-color: #000;
display: flex;
justify-content: space-between; /* 两端对齐 */
align-items: center; /* 上下居中 */
}
.head .line1 .log{
margin-left: 120px;
}
.head .line1 ul{
margin-right: 100px;
}
.head .line1 li{
width: 100px;
text-align: center;
border-right: 1px solid #999;

}
.head .line1 li a{
color: #999999;
}
.head .line1 li:last-child{
border: none;
}

.head .line2{
width: 1000px;
margin: 0 auto;
display: flex;
justify-content: space-between; /* 左中右居中 */
align-items: center; /* 上下居中 */
}
.head .line2 div{
position: relative;
}
.head .line2 .search{
display: inline-block;
width: 435px;
height: 40px;
background: url(../img/icon/search_icon.png);
background-position: 0 -43px;
outline: none;
color: #FFFFFF;
padding-left: 16px;
border: none;
font-size: 16px;

}
.head .line2 .btn{
display: inline-block;
height: 40px;
width: 32px;
position: absolute;
background: url(../img/icon/search_icon.png);
background-position: -454px 0px;
right: 10px;
}
.head .line2 .search:focus{ /* 光标定在搜索匡时 */
background-position: 0 1px;
color: #333333;
}
.head .line2 .search:focus + .btn {
background-position: -456px -42px;
}
.head .line2 ul li {
margin: 0 15px;
}
.head .line2 ul li a{
display: inline-block;
}
.head .line2 li img{
display: inline-block;
height: 20px;
width: 20px;
vertical-align: middle;
margin-right: 10px;
}

.head hr{ /* hr是两个边框 */
border: none;
border-bottom: 1px solid #999;
margin-bottom: 0;
}
.head .line3 {
width: 1000px;
margin: 0 auto;
display: flex;
justify-content:space-between;
align-items: center;
}
.head .line3 .title a{
display: block;
background-color: #000000;
line-height: 53px;
width: 120px;
text-align: center;
}
.head .line3 ul{
margin: 0;
}
.head .line3 li{
width: 90px;
text-align: center;
line-height:53px ;
}
.head .line3 li a:hover{
color: #DE4767;
border-bottom: 3px solid #DE4767;
line-height: 47px;
}
.head .line3 .active{
color: #DE4767;
border-bottom: 3px solid #DE4767;
line-height: 47px;
}

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