/*基本样式*/
.poster-main{
	width: 100%;
	height: 320px;
	position: relative;
	margin: 30px auto;
}
.poster-main a,.poster-main img{
	display:block;
}
.poster-main .poster-list{
	width: 100%;
	height: 500px;
}
.poster-main .poster-list li{
	list-style: none;
}
.poster-main .poster-list .poster-item{
	width: 50%;
	height: auto;
	position:absolute;
	left:0;
	top:0;
}.poster-main .poster-list .poster-item img{
	 width: 100%;
	 height: auto;
 }
.poster-main .poster-btn{ 
	position:absolute;
	bottom:-42px;
	z-index:10; 
	cursor:pointer;  
}
.poster-main .poster-prev-btn{
	left:0;
	background-size: cover;
	background: url(../images/left.png) no-repeat center bottom;
}
.poster-main .poster-next-btn{
	right:0; 
	background: url(../images/right.png) no-repeat center bottom;
}