/*头部*/

.flex {

 width: 100%;
 background: #fff;
 /*  position: fixed;*/
 top: 0;
 left: 0;
 z-index: 10;
 box-shadow: 0 0 10px rgba(0,0,0,.2);

}
.top-blank{
  height: 64px;
  overflow: hidden;
  background: none;
}
.head{width: 100%;min-width:1210px;height: 64px;z-index: 100;padding-top: 8px;transition: all 0.3s;max-width: 1920px; background:#fff; padding-bottom:10px;position: fixed;top: 0;}
.headon{margin-top: 0;padding: 20px 0;background-color: rgba(0, 0, 0, 0.6);}
.head .show{/*max-width: 1720px;*/min-width:1210px;max-width: 1320px;margin: 0 auto;}
.head .logo{float: left;}
.head .nav{float: right;line-height: 48px; }
.head .nav li{float: left;margin-left: 68px;position: relative;}
.head .nav li a{font-size: 16px;font-weight: 600;color: #131313;padding-bottom: 5px;position: relative;overflow: hidden;}
.head .nav li a:after{position: absolute;background-color: #131313;width: 0;height: 1px;right: 0%;bottom: -1px;z-index: -1;transition: all 0.3s ease-in-out;content: ''}
.head .nav li a:hover:after{width: 100%;left: 0%;}
.head .nav .on a{border-bottom: 1px solid #363A40;}