效果图
代码
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<style>
*{
margin: 0;
padding: 0;
list-style: none;
}
.nav{
width: 1210px;
height: 45px;
margin: 20px auto;
background-color: #e8e7e3;
display: flex;
line-height: 45px;
}
/* 为nav的子元素设置flex，而不是a */
.nav li{
flex: auto;
}
.nav a{
display: block;
text-decoration: none;
text-align: center;
color: #777777;
}
.nav a:hover{
background-color: #3f3f3f;
color: #e8e7e3;
}
</style>
</head>
<body>
<ul class="nav">
<li><a href="#">HTML/CSS</a></li>
<li><a href="#">Browser Side</a></li>
<li><a href="#">Server Side</a></li>
<li><a href="#">Promgramming</a></li>
<li><a href="#">XML</a></li>
<li><a href="#">Web Building</a></li>
<li><a href="#">Reference</a></li>
</ul>
</body>
</html>
