QGAd4全般 / By Nukochin </div> <p>[21:17]<br /> @media screen and (max-width: 768px) {<br /> .box_youtube{<br /> position: relative;<br /> width: 100%;<br /> padding: calc(315 / 560 * 100%) 0 0;<br /> }<br /> .box_youtube iframe {<br /> position: absolute;<br /> top: 0;<br /> left: 0;<br /> width: 100%;<br /> height: 100%;<br /> }<br /> } You must activate JavaScript to enhance chess game visualization.