.video-box{
  margin-top:37px;
  background-image:url(https://tkww-static.tkww.hk/index-HKTKWW/video-box-bg.png);
  background-repeat:no-repeat;
  background-size:100% auto;
}
@media (max-width:1400px){
  .video-box{
    margin-top:3vw;
  }
}
@media (max-width:767px){
  .video-box{
    margin-top:9vw;
    background-position: 0 3vw;
    background-image:url(https://tkww-static.tkww.hk/index-HKTKWW/wap/video-bg.png);
  }
}