@charset "utf-8";
	
#page-top {
    position: fixed;
    bottom: 20px;
    right: 20px;
    font-size: 77%;
}

.int{
line-height:1.8;
}

.tube {
     position: relative;
     padding-top: 56.25%; 
     width:100%;
  }
 
.tube iframe {
     position: absolute;
     top: 0;
     left: 0;
     width: 100%;
     height: 100%;
}