*{
margin: 0;padding: 0;list-style: none;
}
#main{
width: 660px;
height: 260px;
margin:0 auto;
background-color: #ccc;
margin-top: 50px;
position: relative;
}
#main .img img{
width: 100%;
height: 100%;
position: absolute;
}
.display-img{
display: none;
}
.display-block{
display: block;
}
.button{
position: absolute;
bottom:10px;
right: 20px;
}
button{
margin-right: 10px;
height: 10px;
width: 10px;
border-radius: 100%;
background-color: transparent;
border: 1px white solid;
outline: none;
}
.achive{
background-color: white;
}
#pre{
width: 100%;
position: absolute;
top: 105px;
left: 0;
}
#pre img{
width: 50px;
height: 50px;
}
#pre img:first-child{
float: left;
}
#pre img:last-child{
float: right;
}
