.bannerbox{height:700px;width:100%;overflow:hidden; position:relative;}
.bannerbox ul{position:relative; text-align:center;}
.bannerbox ul li{list-style:none;width:100%; height:700px;position:absolute;left:0;top:0;}
.bannerbox ul li.fst-li{background:url("../images/1.jpg") center no-repeat;background-size:cover;}
.bannerbox ul li.sec-li{background:url("../images/2.jpg") center no-repeat;background-size:cover;}
.bannerbox ul li.thd-li{background:url("../images/3.jpg") center no-repeat;background-size:cover;}
.bannerbox ul li .img1{position:absolute;}
.containt-div{width:1200px; position:relative; height:700px; clear:both; margin:auto;}

.banner-01-a{ color:rgba(255,255,255,0.3); font-size:80px; font-weight:bold;}
.banner-01-b{ color:#fff; font-size:70px; font-weight:bold; letter-spacing:5px;}

.banner-02-a{ color:rgba(255,255,255,0.3); font-size:420px; font-weight:bold;}
.banner-02-b{ color:#fff; font-size:70px; font-weight:bold; letter-spacing:5px;}
.banner-02-c{ color:#fff; font-size:70px; font-weight:bold; letter-spacing:5px;}

.banner-03-a{ color:rgba(255,255,255,0.3); font-size:420px; font-weight:bold;}
.banner-03-b{ color:#fff; font-size:70px; font-weight:bold; letter-spacing:5px;}

.banner-01-a{top:0; left:22%; position:absolute; filter:alpha(opacity=0); -moz-opacity:0; -khtml-opacity:0; opacity:0;}
.banner-01-b{top:280px; left:7%; position:absolute; filter:alpha(opacity=0); -moz-opacity:0; -khtml-opacity:0; opacity:0;}

.banner-02-a{top:0; right:25%; position:absolute; filter:alpha(opacity=0); -moz-opacity:0; -khtml-opacity:0; opacity:0; }
.banner-02-b{top:280px; left:10%; position:absolute; filter:alpha(opacity=0); -moz-opacity:0; -khtml-opacity:0; opacity:0;}
.banner-02-c{top:350px; left:40%; position:absolute; filter:alpha(opacity=0); -moz-opacity:0; -khtml-opacity:0; opacity:0;}

.banner-03-a{top:0; left:16%; position:absolute; filter:alpha(opacity=0); -moz-opacity:0; -khtml-opacity:0; opacity:0;}
.banner-03-b{top:280px; left:15%; position:absolute; filter:alpha(opacity=0); -moz-opacity:0; -khtml-opacity:0; opacity:0;}

.nav{width:150px;height:15px;position:absolute;bottom:20px;right:20px;z-index:2; left:50%;margin-left:-50px}
.nav dl dd{list-style-type:none;width:15px;height:15px;float:left;margin-right:5px;cursor:pointer;border:1px solid #ddd;}
.nav dl .bg{background:#2a3463;width:17px;height:17px;border:none;}