<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title></title>
<style>
*{
margin: 0;
padding: 0;
}
#menu{
background-color: purple;
width: 100%;
height: 50px;
}
.item{
float: left;
width: 100px;
height: 50px;
line-height: 50px;
/* border: 1px solid red; */
text-align: center;
color: white;
position: relative;
}
.item:hover{
background-color: red;
}
#container{
width: 720px;
margin: auto;
}
.down_menu{
display: none;
position: absolute;
}
.item:hover > .down_menu{
background-color: #cccccc;
display: block;
color: black;
left: 20px;
}
</style>
</head>
<body>
<div id="menu">
<div id="container">
<div class="item">game1
<div class="down_menu">
<div>xiazai</div>
<div>jiaoyi</div>
<div>waigua</div>
<div>gonglv</div>
</div>
</div>
<div class="item">game2
<div class="down_menu">
<div>xiazai</div>
<div>jiaoyi</div>
<div>waigua</div>
<div>gonglv</div>
</div>
</div>
<div class="item">game3
<div class="down_menu">
<div>xiazai</div>
<div>jiaoyi</div>
<div>waigua</div>
<div>gonglv</div>
</div>
</div>
<div class="item">game4
<div class="down_menu">
<div>xiazai</div>
<div>jiaoyi</div>
<div>waigua</div>
<div>gonglv</div>
</div>
</div>
<div class="item">game5
<div class="down_menu">
<div>xiazai</div>
<div>jiaoyi</div>
<div>waigua</div>
<div>gonglv</div>
</div>
</div>
<div class="item">game6
<div class="down_menu">
<div>xiazai</div>
<div>jiaoyi</div>
<div>waigua</div>
<div>gonglv</div>
</div>
</div>
</div>
</div>
</body>
</html>
效果图
