.fl{float:left}
.fr{float:right}
.clear{clear:both}



.div3{width:100%;}
.div4{width:100%;}
.nav_box{width:100%;height:90px;line-height: 90px;background:url(../images/nav_bg.png) repeat-x; z-index:999;	position: relative;	clear: both;}
.nav_box .logo_nav{position:relative;height:90px;width:1000px;min-width:1000px;margin:0px auto;z-index:999;}


  ul,li{ list-style: none;}
  .lubo{ width: 100%; clear: both; position:relative; height:500px;}
  .lubo_box{ width: 100%; height:500px; }
  .lubo_box li{ float: left;position: absolute; top: 0; left: 0; width: 100%; height:500px; opacity: 0;filter:alpha(opacity=0);}
  .lubo_box li a{ display: block;width: 100%;  height: 100%;}

  .lubo_box li img{ width: 100%; height: 500px;}

  /*圆点*/
  .cir_box{ overflow: hidden; position: absolute; z-index: 100;}
  .cir_box li{ float: left; width: 30px; height: 5px; margin:0 5px; cursor: pointer; background: #fff; opacity: 0.8;filter:alpha(opacity=80);}
  .cir_on{ background: #000 !important;}

  /*按钮*/
  .lubo_btn{ position: absolute; width: 100%; top: 200px;}
  .left_btn, .right_btn{ width: 30px; height: 80px; background: #000;opacity: 0.4;filter:alpha(opacity=40); cursor: pointer; color: #fff; line-height: 80px; font-size: 30px; text-align: center;-webkit-user-select:none;-moz-user-select:none;-ms-user-select:none;user-select:none;}
  .left_btn{ float: left;}
  .right_btn{ float: right;}


p {
	margin-bottom:0px;
		margin: 0;
	padding: 0;
	border: 0;
	font-size: 100%;
	font: inherit;
	vertical-align: baseline;
}