.a_slow
{
    -webkit-animation-fill-mode: both;
    -moz-animation-fill-mode: both;
    -ms-animation-fill-mode: both;
    -o-animation-fill-mode: both;
    -animation-fill-mode: both;
    -webkit-animation-duration: 1.6s;
    -moz-animation-duration: 1.6s;
    -ms-animation-duration: 1.6s;
    -o-animation-duration: 1.6s;
    -animation-duration: 1.6s;
}