html, body {
    background: black;
}

.container {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translateX(-50%) translateY(-50%);
    width: 100vw;
    font-size: 7vw;
    text-align: center;
    color: white;
    font-family: 'Microsoft Yahei';
}