footer {
    display: flex;
    flex-direction: column;
    /* align-items: center; */
    background-color: #cfeaff;
}

.footer-left {
    order: 2;
    width: 100%;
}

.footer-right {
    order: 1;
    position: relative;
    max-width: 100%;
}

.sns-icons{
    margin: 0 auto;
}

.footer-right .landing {
    display: none;
    opacity: 0;
    transition: opacity 0.6s ease;
    position: absolute;
    bottom: 70%;
    right: 40%;
    width: 20%;/* サイズ */
    height: auto;
    z-index: 2;
    pointer-events: auto;
    cursor: pointer;

    animation: jump 3s infinite ease-in-out;
}

.footer-right .landing.show {
    display: block;
    opacity: 1;
}

.footer-right .landing.hide {
    opacity: 0;
}

@keyframes jump {

    0%,30%,70%,100% {
        transform: translateY(0);
    }

    50% {
        transform: translateY(-10vh);
    }
}