.topnav a.active {
  width: 76%;
}
.topnav a:not(:first-child) {display: none;}
.topnav a.icon {
  float: right;
  display: block;
}
.topnav.responsive {position: relative;}
  .topnav.responsive a.icon {
    position: absolute;
    right: 0;
    top: 0;
  }
  .topnav.responsive a.bar-right {
    float: none;
    display: block;
    width: 100%;
  }
  .topnav.responsive a.icon:last-child{
    width: 10%;
  }
  .topnav.responsive a:first-child  {
    float: none;
    display: block;
    text-align: center;
  }
  .banner{
    height: auto;
    width: 100%;
    margin-top: 100px;
}
  .agora_Agora1{
    width: 40%;
    height: auto;
}