.section-about .video-intro {
  padding-top: 42%;
}
.section-about .video-intro img,
.section-about .video-intro iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: inherit;
}
.section-about .video-intro .btn-play {
  width: 6.25rem;
  height: 6.25rem;
  border-radius: 100%;
  position: absolute;
  top: 50%;
  left: 50%;
  -webkit-transform: translate(-50%, -50%);
          transform: translate(-50%, -50%);
  z-index: 1;
  background: rgba(0, 0, 0, 0.6);
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-align: center;
      -ms-flex-align: center;
          align-items: center;
  -webkit-box-pack: center;
      -ms-flex-pack: center;
          justify-content: center;
  color: #fff;
  cursor: pointer;
  -webkit-transition: 0.3s;
  transition: 0.3s;
  font-size: 1.5625rem;
}
.section-about .video-intro .btn-play:hover {
  background: black;
  -webkit-transition: 0.3s;
  transition: 0.3s;
}
.section-about .video-intro .btn-play.hidden {
  display: none !important;
}

.section-auth .form-control {
  min-height: 2.1875rem;
  border-radius: 0;
  font-size: 0.875rem;
}
.section-auth .form-control:focus {
  -webkit-box-shadow: unset;
          box-shadow: unset;
}
.section-auth .social-login li:not(:last-child) {
  margin-bottom: 0.625rem;
}
.section-auth .social-login li a {
  letter-spacing: 0.076rem;
  font-size: 0.875rem;
  background-color: #e0dfdf;
}
.section-auth .social-login li a:hover {
  opacity: 0.8;
  color: #000;
}
.section-auth .social-login li a i {
  width: 2.5rem;
  height: 2.5rem;
  -ms-flex-negative: 0;
      flex-shrink: 0;
  margin-right: 1.25rem;
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-align: center;
      -ms-flex-align: center;
          align-items: center;
  -webkit-box-pack: center;
      -ms-flex-pack: center;
          justify-content: center;
}

.item-course .img {
  padding-top: 60%;
}
.item-course .img::after {
  content: "";
  width: 2.5rem;
  height: 1.875rem;
  background-image: url(../images/play-ytb-small.png);
  position: absolute;
  background-repeat: no-repeat;
  background-size: contain;
  top: 50%;
  left: 50%;
  -webkit-transform: translate(-50%, -50%);
          transform: translate(-50%, -50%);
  z-index: 1;
}

.section-contact {
  background-color: #f5efe9;
}
.section-contact .title {
  font-size: 2.75rem;
  margin-bottom: 0.625rem;
}

.item-product__other .img {
  padding-top: 100%;
}
@media(max-width:1652px){
  .section-contact .title{
    font-size: 35px;
  }
  .item-contact .title-contact{
    font-size: 1rem;
  }
}
@media(max-width:1199px){
  .section-contact .title{
    font-size: 25px;
  }
}
@media (max-width: 991px) {
  .section-about .video-intro .btn-play {
    width: 3.125rem;
    height: 3.125rem;
  }
}
@media(max-width:767px){
  .section-contact .title{
    font-size: 18px;
  }
  .item-contact .title-contact{
    font-size: 14px;
  }
}