菜单样式如下：
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=GBK" />
<title>下拉菜单</title>
<style type="text/css">
.dropdown{
position: relative;
display: inline-block;
}
.dropdown .dropdown-content{
display: none;
position: absolute;
background-color: #f9f9f9;
min-width: 160px;
box-shadow: 0px 8px 16px 0px rgba(0,0,0,0.2);
}
.dropdown:hover .dropdown-content{
display: block;
}
.dropdown-content a{
color: black;
font-family: "微软雅黑", "方正书体", "宋体";
text-decoration: none;
padding: 12px 16px;
display: block;
}
.dropbtn{
background-color: #4CAF50;
color: white;
border: none;
font-size: 16px;
font-family: "微软雅黑", "方正书体", "宋体";
padding: 16px;
cursor: pointer;
}
.dropdown-content a:hover {
background-color: #f1f1f1
}
.dropdown:hover .dropbtn{
background-color: #3e8e41;;
}
</style>
</head>
<body>
<div class = "dropdown">
<button class="dropbtn">下拉菜单</button>
<div class="dropdown-content">
<a href="#">wangzhuo</a>
<a href="#">wangzhuo</a>
<a href="#">wangzhuo</a>
</div>
</div>
</body>
</html>