悬停在按钮上，按钮抖动

<style>
.lanren {
    margin: 100px auto;
    width: 200px;
    text-align: center;
    height: 40px;
    line-height: 40px;
    border: 1px solid #CCC;
    border-radius: 2px;
}
.lanren:hover {
    animation: shake 0.82s cubic-bezier(.36, .07, .19, .97) both;
}
@keyframes shake {
    10%, 90% {
        transform: translate3d(-1px, 0, 0);
    }
    20%, 80% {
        transform: translate3d(2px, 0, 0);
    }
    30%, 50%, 70% {
        transform: translate3d(-4px, 0, 0);
    }
    40%, 60% {
        transform: translate3d(4px, 0, 0);
    }
}
</style>

<div class="lanren">你敢悬停在我上面吗？</div>​