/************重置样式************/
.wrap{width: 1000px;margin:20px auto;}
.poster-main{
	width: 640px;
	height: 270px;
	position: relative;
}
.poster-main .poster-btn{
	width: 100px;
	height: 270px;
    position: absolute;
    top:0;
    cursor: pointer;
}
.poster-main .poster-prev-btn{
    left: 0;
    background:url('./1.png') no-repeat;
    background-position: left center;
}
.poster-main .poster-next-btn{
	right:0;
	background:url('./2.png') no-repeat;
    background-position: right center;
}
.poster-main .poster-list .list-item{ 
	position: absolute;
    top:0;
    left:0;
}
.list-item a,.list-item a img{
	display: block;
	width: 100%;
	height: 100%;
	border: 0;
}