.ss_big{
    animation:suofangzhanshi 2s linear  infinite;
    -webkit-animation:suofangzhanshi 2s linear  infinite;
}
@-webkit-keyframes suofangzhanshi{
    0%{
        opacity:0.0;
        -webkit-transform:scale(0.1);
    }
    50%{
        opacity:0.7
    }
    100%{
        opacity:0;
        -webkit-transform:scale(1);
    }
}
@keyframes suofangzhanshi{
    0%{
        transform:scale(0.1);
        opacity:0.0
    }
    50%{
        opacity:0.7
    }
    100%{
        transform:scale(1);
        opacity:0.0
    }
}