html,
body {
    width: 100%;
    height: 100%;
    margin: 0;
    padding: 0;
    color: #fff;
    font-family: 'Alibaba PuHuiTi R';
    letter-spacing: 1px;
    font-size: 16px;
}

.layout {
    display: flex;
    align-items: center;
    justify-content: center;
}