.video-items{margin-top:90px!important;padding:0!important}.introduction ul{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap}.introduction ul li{margin-bottom:20px;width:49%}.introduction ul li iframe{box-shadow:0 8px 18px 3px rgba(55,99,170,.1)}@media screen and (max-width:768px){.video-items{margin-top:45px!important}.introduction ul li>iframe{width:100%;height:250px;border-radius:8px}.introduction ul{justify-content:center}.introduction ul li{margin-bottom:10px;width:100%}.introduction ul li:last-child{margin-bottom:0}}