.prm-content__image-bell img {
    display: block;
    transform-origin: 50% 0%;
    animation: prm-bell-swing 2s ease-in-out infinite;
    will-change: transform;
}

@keyframes prm-bell-swing {
    0% {
        transform: rotate(0deg);
    }
    20% {
        transform: rotate(9deg);
    }
    40% {
        transform: rotate(-9deg);
    }
    60% {
        transform: rotate(6deg);
    }
    80% {
        transform: rotate(-6deg);
    }
    100% {
        transform: rotate(0deg);
    }
}