#teacher2 {width:100%; margin:50px auto 0 auto; overflow:hidden;}
#teacher2 .nav {  font-size:20px;  display:inline-block; border-bottom:1px solid #888; clear:both;}
#teacher2 .cont { margin:50px 0 0 0 }
#teacher2 .youtube {position: relative; height:0; padding-bottom: 56.25%; margin: 100px 0}
#teacher2 .youtube iframe {width:1000px; height:562; left:0; }
#teacher2 .review .tit {text-align:center; padding:20px 0 50px 0 ; font-weight:300; font-size:45px; position:relative;  }
#teacher2 .review .tit:after {content:""; display:block; width:50px; height:2px; background-color:#dfdfdf;  margin:10px auto 0 auto; text-align: center;  }

  
/*---------------------------------------
  MOBILE RESPONSIVE              
-----------------------------------------*/
@media (max-width: 1023px) {
#teacher2 {}
#teacher2 .youtube {position: relative; height:0; padding-bottom: 56.25%; margin: 10px 0}
#teacher2 .youtube iframe {width:100%; height:100%; left:0; }

}
@media (max-width: 768px) {
}
@media (max-width: 640px) {
}
@media (max-width: 480px) {
}
@media (max-width: 320px) {
}