.about-section{margin-bottom:50px}.about-section span .btn{margin-top:15px}.about-section .span3{text-align:center}.about-section .pic{display:block;margin:20px auto 0}.about-section .btn-expand:hover .ico{background-image:url("http://static.memrise.com/img/sprites/icons-white.png?fcc535")}@media only screen and (-webkit-min-device-pixel-ratio: 1.5), only screen and (min-device-pixel-ratio: 1.5){.about-section .btn-expand:hover .ico{background-image:url("http://static.memrise.com/img/sprites/icons-white@2x.png?fcc535")}}