.carousel{
	width: 1280px;
	margin: auto;
	position: relative;
}

.carousel ul{
    margin: 0;
    padding: 0;
    position: relative;
    width: 800px;
    height: 500px;
    
}
.carousel ul li{
    list-style: none;
    float: left;
    position: absolute;
    top: 0;
    left: 0;
    display: none;
}
#item1{
    z-index: 3;
}
#item2{
    z-index: 2;
}
#item3{
    z-index: 1;
}
/*向左向右的按钮*/
.left,.right{
    position: absolute;
    top: 200px;
    z-index: 10;
    width: 30px;
    height: 30px;
    border: none;
    background: #000;
    color: #fff;
    text-align: center;
    padding: 0;
    opacity: 0.1;
    cursor: pointer;
}
.left{
    left: 0;
}
.right{
    right: 0;
}
.left:hover,.right:hover{
    opacity:1;
}
/*圆点*/
.dot{
	width: 1280px;
	bottom: 0;
	height: 30px;
	position: absolute;
	text-align: center;
	z-index: 30;
	top: 437px;
}
.dot span{
    display: inline-block;
    width: 12px;
    height: 12px;
    border-radius: 50px;
    background: #fff;
    margin: 0 15px 0 0 ;
    cursor: pointer;
}
.dot .active{
    background: #f00 !important;
}