.vk_video{width:100%;height:720px;max-width:1280px;display:block;margin:0 auto;}@media screen and (max-width: 992px){.vk_video{height:512px;}}@media screen and (max-width: 800px){.vk_video{height:400px;}}@media screen and (max-width: 480px){.vk_video{height:346px;}}