html,
body {
    margin: 0;
    padding: 0;
    background: #101010;
    touch-action: pan-y;
}

button {
    margin: 0;
    padding: 0;
    border: 0;
    background: transparent;
    cursor: pointer;
    -webkit-appearance: none;
    appearance: none;
}

.layer {
    position: absolute;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
}

.center {
    display: flex;
    align-items: center;
    justify-content: center;
    /*peiqi added*/
    position: absolute;
    top: 50%;
    left: 50%;
    margin-right: -50%;
    transform: translate(-50%, -50%);
}

.none {
    display: none;
}

#app {
    /*position: relative;*/
    width: 100%;
    padding: 3%;
    box-sizing: border-box;
}

#video-container {
    position: relative;
    width: 92%;
    height: 92%;
}

#video {
    display: block;
    width: 100%;
    height: auto;
    left: 0;
    border: 2px #222222 solid;
    background: #101010;
    box-sizing: border-box;
    object-fit: contain;
}

.playing {
    cursor: none;
}

#play {
    position: absolute;
    color: #fff;
    cursor: pointer;
}

    #play::before,
    #play::after {
        content: "";
        position: absolute;
        left: 50%;
        top: 50%;
    }

    #play::before {
        width: 12em;
        height: 12em;
        margin: -6em 0 0 -6em;
        background: rgba(255, 255, 255, 0.3);
        -webkit-border-radius: 50%;
        border-radius: 6%;
    }

    #play::after {
        border-style: solid;
        border-color: transparent transparent transparent rgba(255, 255, 255, 0.7);
        border-width: 3em 0 3em 4em;
        margin-left: -1.5em;
        margin-top: -3em;
    }

.fade-in-init {
    opacity: 0;
}

.fade-in {
    opacity: 1;
    transition: opacity 5s ease;
}

.media-block {
    display: block;
}

    .media-block img,
    .media-block video {
        display: block;
        width: 100%;
    }

.about > .content {
    width: 10em;
    padding: 1em 2em;
}

    .about > .content > * + * {
        margin-top: 0.8em;
    }

.about.fore {
}

    .about.fore .content {
        background: #101010;
    }

    .about.fore .replay {
    }

.about.back {
}

    .about.back .qr,
    .about.back .mail {
        visibility: hidden;
    }

.replay {
    width: 100%;
    margin: 0 auto;
}

.mail {
    display: block;
    width: 1.5em;
    margin: 0 auto;
}