@charset "utf-8";
/* CSS Document */
 #nav{ background-color:#0076c4; background-color:#901010;  height:46px; z-index:99; position:relative;  width:100%; min-width:1200px; margin:auto; padding:0px;}
 
/*头部样式*/
.bjtu-header{width:100%;min-width: 300px; height:auto; z-index:990;top: 0;left: 0;transition: all 0.3s ease-in-out;}
.black_bg01,.mobile_bg02{position: fixed;background-color:#000;opacity: 0.7;width:100%;height:100%;display: none;filter: alpha(opacity=70);z-index: 90;}


.bjtu-top{background-color:#005bac;}
.bjtu-top > div{width: 1200px;margin:0 auto;}
.bjtu-logo{ width: auto;float: left;padding:12px 0 13px;transition: margin 0.3s ease-in-out;position: relative;z-index: 200;}
.bjtu-logo a{}
.bjtu-topNav{float: right;padding-top: 17px;}
.bjtu-topNav a{display: inline-block;*display: inline;*zoom:1;background-color: #004d92;height: 25px;border-radius: 15px;line-height: 23px;padding:0 10px;font-size: 14px;font-weight: bold;margin:0 4px;transition: all 0.3s ease-in-out;}
.bjtu-topNav .bjtu-serBtn{width: 32px;height: 32px;text-align: center;background-color: #f6ad3c;line-height: 32px;color:#fff;font-size: 18px;padding:0;font-weight: normal;margin-right: 0;border-radius: 5px;}
.bjtu-topNav a.a1{color:#f6ad3c;}
.bjtu-topNav a.a2{color:#51c200;}
.bjtu-topNav a.a3{color:#00ccbe;}
.bjtu-topNav a.a4{color:#fe5635;}
.bjtu-topNav a.a1:hover{color:#fff;background-color: #f6ad3c}
.bjtu-topNav a.a2:hover{color:#fff;background-color: #51c200}
.bjtu-topNav a.a3:hover{color:#fff;background-color: #00ccbe}
.bjtu-topNav a.a4:hover{color:#fff;background-color: #fe5635}
.bjtu-topNav a.a5{background:none;font-weight: normal;color:#fff;margin:0 30px;}
.bjtu-nav{height:46px;position: relative;transition: all 0.3s ease-in-out;}
.bjtu-nav > ul{width: 1200px;margin:0 auto;height:46px;position: relative;z-index: 2;transition: all 0.3s ease-in-out;}
.bjtu-nav li{width: 11.1%;float:left;text-align: center;position: relative;}
.bjtu-nav li > a{color:#fff;line-height: 46px;display: block;height: 46px;font-size: 16px;font-weight: bold;}
.bjtu-nav ul li.on > a,.bjtu-nav ul li:hover > a{color:#005bac;position: relative;z-index: 3}
.bjtu-nav ul li:before,.bjtu-nav ul li:after{content: '';width: 0;position: absolute;left: 50%;top: 0;transition: all 0.3s ease;}
.bjtu-nav ul li:before{height: 4px;background-color: #eea200;z-index: 1}
.bjtu-nav ul li:after{height: 46px;background-color: #cce1fa;z-index: 0;width: 0}
.bjtu-nav ul li.on:before,.bjtu-nav ul li.on:after{left: 0;width: 100%;}
.bjtu-nav ul li.on .bjtu-subNav{display: block;}
.bjtu-subNav{display: none;position: absolute;left:0;top:46px;display: none;width:150%;font-size: 14px;*background:url(../../images/img2019/subNav_bg.png) repeat;}
.sub_nav { display: none; width: 100%; position: absolute; left: 100%; bottom: 0px; background: #d6e7fb; transition: 0.5s; transform: rotateX(360deg);}
.ph_sub_nav { display: none; margin: 0 0 0 10px; }
.mobile_subNav dd.current .ph_sub_nav { display: block; }
.bjtu-subNav dd.current .sub_nav{ display: block; }
.bjtu-subNav:before{content: '';width: 100%;height: 100%;background-color:#cce1fa;opacity: 0.8;filter: alpha(opacity=80);position: absolute;left: 0;top: 0;z-index: 0}
.bjtu-subNav dd{position: relative;z-index: 3;text-align: left;}
.bjtu-subNav dd>i { width:33px; height:33px; position:absolute; right:0px; top:0px; }
.bjtu-subNav dd>i:before { content:''; position:absolute; width:10px; height:2px; background:#005bac; left:0px; top:15px; }
.bjtu-subNav dd>i:after { content:''; position:absolute; width:10px; height:2px; background:#005bac; left:0px; top:15px; transform:rotate(90deg) }
.bjtu-subNav dd:hover>i:after{ display:none; }
.bjtu-subNav a{color:#4c4c4c;padding:5px 15px;display: block;line-height: 23px;}
.bjtu-subNav a:hover{background-color:#669ccc;color:#fff;}
.bjtu-header.currents{height: 60px;line-height: 60px;position: fixed;background:#005bac;box-shadow: 0 2px 6px rgba(0,0,0,0.4)}
.bjtu-header.currents .bjtu-topNav,.bjtu-header.currents .bjtu-nav::before{display: none;}
.bjtu-header.currents .bjtu-top{width: auto;}
.bjtu-header.currents .bjtu-logo{width: 160px;position: absolute;top: 0;left: 50%;margin-left: -600px;padding-top: 8px;}
.bjtu-header.currents .bjtu-nav{height: 60px;line-height: 60px;width: 1200px;margin:0 auto;}
.bjtu-header.currents .bjtu-nav > ul{margin-left: 180px;width: auto;height: 60px;}
.bjtu-header.currents .bjtu-nav li{background:none;height: 60px;}
.bjtu-header.currents .bjtu-nav li > a,.bjtu-header.currents .bjtu-nav ul li::after{height: 60px;line-height: 60px;}
.bjtu-header.currents .bjtu-subNav{top:60px;}
.bjtu-subNav2{left: -50%;}
.bjtu-headerr.currents .navnew ul li > a{}
.flipInY  {
  -webkit-animation-name: flipInY ;
  animation-name: flipInY ;
  animation-duration: 0.4s;
  -webkit-animation-duration: 0.4s;

  animation-timing-function: ease-in-out;
  -webkit-animation-timing-function: ease-in-out;

  visibility: visible !important;
  display: block;
}