style.css

* {
    padding: 0;
    border: 0;
    margin: 0;
}

body {
    background-color: white;
    overflow: hidden;
}

#audioBox {
    position: fixed;
    padding: 10px;
    right: 0;
    z-index: 100;
}

audio {
    outline: none;
}

#videoBox {
    float: left;
    position: relative;
    left: 50%;
    height: 100vh;
}

video {
    position: relative;
    left: -50%;
    top: 0;
    bottom: 0;
    height: 100%;
    width: auto;
}

.infoBox {
    margin: 20px 0px;
    padding: 20px 0px;
    text-align: center;
    font-size: 14px;
    color: black;
    /* text-shadow: black 0.1em 0.1em 0.2em; */
    background-color: white;
    opacity: 1;
    border-radius: 30px;
    /* line-height: 3em; */
    letter-spacing: 0.1em;
    font-family: "Microsoft Yahei", sans-serif;
}


/* 预设分辨率大于1080时 */

@media screen and (min-height:1080) {
    #videoBox,
    video {
        position: fixed;
        left: 0;
        right: 0;
        top: 0;
        bottom: 0;
        height: 100%;
        width: 100%;
    }
}