/* 跳ねるホバーアクション */
.hover_bounce:hover .hover_bounce_img{
    animation:bounce 0.8s ease-out;
}

@keyframes bounce {
    0%    { transform:translate(0, 0); }
    16.6% { transform:translate(0, -16px); animation-timing-function:ease-in; }
    33.3% { transform:translate(0, 0); }
    49.8% { transform:translate(0, -10px); animation-timing-function:ease-in; }
    66.4% { transform:translate(0, 0); }
    83%   { transform:translate(0, -4px); animation-timing-function:ease-in; }
    100%  { transform:translate(0, 0); }
}