.opacity_anim {
    -webkit-animation: opacity_anim 0.5s ease-out both;
    animation: opacity_anim 0.5s ease-out both;
}

.opacity_anim-1d {
    -webkit-animation: opacity_anim 0.5s ease-out both;
    animation: opacity_anim 0.5s ease-out both;
    -webkit-animation-delay: 0.2s;
    animation-delay: 0.2s;
}

.opacity_anim-2d {
    -webkit-animation: opacity_anim 0.5s ease-out both;
    animation: opacity_anim 0.5s ease-out both;
    -webkit-animation-delay: 0.5s;
    animation-delay: 0.5s;
}

.slide-top {
    -webkit-animation: slide-top 1s alternate infinite;
    animation: slide-top 1s alternate infinite;
}

/**
 * ----------------------------------------
 * animation opacity_anim
 * ----------------------------------------
 */
@-webkit-keyframes opacity_anim {
    0% {
        opacity: 0;
    }
    100% {
        opacity: 1;
    }
}

@keyframes opacity_anim {
    0% {
        opacity: 0;
    }
    100% {
        opacity: 1;
    }
}

/**
 * ----------------------------------------
 * animation slide-top
 * ----------------------------------------
 */
@-webkit-keyframes slide-top {
    0% {
        -webkit-transform: translateY(0);
        transform: translateY(0);
    }
    100% {
        -webkit-transform: translateY(7px);
        transform: translateY(7px);
    }
}

@keyframes slide-top {
    0% {
        -webkit-transform: translateY(0);
        transform: translateY(0);
    }
    100% {
        -webkit-transform: translateY(7px);
        transform: translateY(7px);
    }
}