button

TIRAL

xxx

button.submit {
    width: 590px;
    height: 72px;
    border-radius: 72px;
    font-size: 24px;
    border: 3px solid #000;
    font-weight: bold;
    margin: 10px;
    background: none;
    position: relative; /* imp */
    overflow: hidden; /* imp */
    z-index: 0; /* imp */
    /* 如果是a 标签没居中
    display: flex;
    align-items: center;
    justify-content: center;
    */
}
button.submit:hover {
    color: #fff;
}
button.submit:after {
    display: block;
    content: "";
    z-index: -1;
    position: absolute;
    width: 100%;
    height: 100%;
    top: 100%;
    left: 0;
    background-color: #000;
    transition-timing-function: cubic-bezier(0,.52,.35,.99);
    transition-duration: .25s;
}
button.submit:hover:after {
    top: 0;
}
.animation-txt-cut-in-container {
    overflow: hidden;
    line-height: 1;
    display: block;
}
.js-animation-fire .animation-txt-cut-in-inner {
    opacity: 0;
    display: block;
    animation:show-text-cut-in 0.8s cubic-bezier(0, 0.52, 0.35, 0.99) 0.3s;
    animation-fill-mode:forwards;
}
@keyframes show-text-cut-in {
    from { opacity: 0; transform: translateY(100%); }
    to { opacity: 1; transform: translateY(0); } 
}