@font-face {
    font-family: 'DIN';
    src: url('DIN-Medium.otf') format('truetype');
    font-weight: normal;
    font-style: normal;
}

body {
    overflow: hidden;
}

.backImages {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: -1;
    transition: opacity 0.5s ease-in-out;
    opacity: 0;
}

#clock {
    font-size:10vw;
    text-align: left;
    font-family: 'DIN', serif;
    color: #38577B;
    position: fixed;
    top:13vw;
    left: 7.5vw;
}
#date {
    font-size:2.6vw;
    text-align: left;
    font-family: 'Roboto', sans-serif, '微软雅黑';
    color: #38577B;
    position: fixed;
    top: 25vw;
    left: 7.5vw;
}