*{margin:0;padding:0;list-style: none;border:0;}
.container1 { margin:0px auto; width:980px; height:400px;}
.poster-main{ position:relative;width:800px;margin:0px auto;}
.poster-main a,.poster-main img{display:block;}
.poster-main .poster-list{width:600px;}
.poster-main .poster-list .poster-item{ position:absolute;left:0;top:0;}
.poster-main .poster-btn{ position:absolute;top:0;width:100px;height:400px; z-index:11; cursor:pointer; }
.poster-main .poster-prev-btn{left:0; background:url(mas20160604_btnl.png)no-repeat center center;}
.poster-main .poster-next-btn{right:0; background: url(mas20160604_btnr.png) no-repeat center center;}