/* 核心代码 */
.focus,.focus ul li {width:1200px;height:320px;}
.focus {overflow:hidden;position:relative;}
.focus ul{height:100%;position:absolute;}
.focus ul li{float:left;overflow:hidden;position:relative;background:#000;}
.focus ul li div{position:absolute;overflow:hidden;}
.focus .btn{position:absolute;width:98%;height:10px;padding:5px 10px;right:0;bottom:15px;text-align:center;}
.focus .btn span{display:inline-block;_display:inline;_zoom:1;width:20px;height:20px;_font-size:0;margin-left:5px;cursor:pointer;background:#fff;border-radius:50%;}
.focus .btn span.on{background:red;}
.focus .preNext{width:45px;height:100px;position:absolute;top:100px;background:url(lb.png) no-repeat 0 0;cursor:pointer;display:none;}
.focus .pre{left:0;}
.focus .next{right:0;background-position:right top;}