废话不多说，直接上代码：
* {
margin: 0px;
padding: 0px;
}
.stage {
width: 500px;
height: 300px;
border: 5px solid black;
margin: 200px;
position: relative;
overflow: hidden;
}
.to-left,.to-right {
position: absolute;
top: 0px;
width: 50px;
height: 300px;
background-color: black;
color: white;
font-size: 30px;
text-align: center;
line-height: 300px;
opacity: 0.3;
}
.to-left {
left: 0px;
}
.to-right {
right: 0px;
}
.to-left:hover,.to-right:hover {
cursor: pointer;
opacity: 0.5;
}
.banner {
width: 3000px;
height: 300px;
}
.items {
float: left;
width: 500px;
height: 300px;
background-color: blanchedalmond;
font-size: 100px;
text-align: center;
line-height: 300px;
}
</style>