.arrow {
    width: 100%;
    position: fixed;
    left:0px;
    bottom: 0px;
    text-align: center;
    z-index:10000000000000;
}
.arrow.bounce {
    -moz-animation: bounce 2s infinite;
    -webkit-animation: bounce 2s infinite;
    animation: bounce 2s infinite;
}
.arrow i {
    font-size: 90px;
    color: #a10814;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateY(0);
    }
    40% {
        transform: translateY(-30px);
    }
    60% {
        transform: translateY(-15px);
    }
}