@media (max-width: 979px){.main_bg{background:url(/assets/about/media/sbcchannel/images/main_bg_sp.jpg?202412691252) no-repeat center;background-size:cover;padding:50% 0 5%}.mainvisual iframe{border:10px solid #ffffff}.title img{margin:10px auto;width:220px;height:auto}}@media (min-width: 980px){.main_bg{background:url(/assets/about/media/sbcchannel/images/main_bg.jpg?202412691252) no-repeat center;background-size:cover;height:670px}.mainvisual{padding-top:160px;text-align:center}.mainvisual .youtube{max-width:750px;margin:0 auto;border:25px solid #ffffff}.title img{margin:10px auto;width:240px}.btn_more img{width:400px}}