@charset "UTF-8";


.video560{
  max-width: 560px;
  text-align: center;
  margin: 0 auto;
}
.video640{
  max-width: 640px;
  text-align: center;
  margin: 0 auto;
}
.video100{
  max-width: 100%;
  text-align: center;
  margin: 0 auto;
}
.youtube{
  position: relative;
  width: 100%;
  padding-top: 56.25%;
  overflow: hidden;

}
.youtube iframe{
  position: absolute;
  top: 0;
  right: 0;
  width: 100% !important;
  height: 100% !important;
}
.box840 {
  max-width: 840px !important;
  margin:0 auto !important;
}