@media (max-width: 450px) {
    .sub-article,
    .sub-promotion,
    .sub-navigation {
        overflow: hidden;
    }

    .sub-nav-wrapper {
        width: 100%;
        padding: 0 20px;
        padding-bottom: 15px;
        justify-content: unset;
        gap: 0;
        white-space: nowrap;
        overflow: auto;
    }

    .sub-navBtn {
        animation: scrollNow .5s 1s;
    }

    @keyframes scrollNow {
        25% {
            transform: translateX(-20px);
        }

        50% {
            transform: translateX(0);
        }

        75% {
            transform: translateX(-20px);
        }

        100% {
            transform: translateX(0);
        }
    }
}