.demo-video{display:block;width:min(100%,420px);height:auto;margin:28px auto;background:#123e32}.preview-content{max-width:850px;padding-top:40px;padding-bottom:60px}.preview-content h1{font-size:clamp(38px,6vw,66px)}.preview-content li{margin:12px 0;line-height:1.7}