/*
 *  動画講座
 */

.youtube_title {
    position: relative;
    margin-top: 30px !important;
}

.wrap_youtube {
    position: relative;
    width: 100%;
}

.wrap_youtube:before {
    content:"";
    display: block;
    padding-top: 56.25%; /* 高さと幅の比を16:9に固定。9/16*100=56.25 */
}

.tutorial_ytb {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}