/*上下来回移动动画*/

@-webkit-keyframes bounce-up {
    25% {
        -webkit-transform: translateY(6px);
    }

    50%, 100% {
        -webkit-transform: translateY(0);
    }

    75% {
        -webkit-transform: translateY(-6px);
    }
}

@keyframes bounce-up {
    25% {
        transform: translateY(6px);
    }

    50%, 100% {
        transform: translateY(0);
    }

    75% {
        transform: translateY(-6px);
    }
}

.animate-bounce-up {
    position: absolute;
    -webkit-animation: bounce-up 1.4s linear infinite;
    animation: bounce-up 1.4s linear infinite;
}