style.css

*,
*::after,
*::before {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

canvas {
    display: block;
}

#loader {
    width: 100%;
    height: 100vh;
    background-image: url("/images/loadingBg.jpg");
    background-size: cover;
    position: absolute;
    left: 0;
    top: 0;
}

#loaderProgress {
    position: absolute;
    width: 100%;
    top: 40%;
    color: #fff;
    font-size: 2rem;
    text-align: center;
    transition: 1s all;
}

#tip {
    position: absolute;
    width: 50%;
    left: 48%;
    top: 35%;
    color: #fff;
    font-size: 1rem;
    text-align: center;
    writing-mode: vertical-lr;
    display: none;
}
.upTip {
    animation: 3s upTip infinite alternate;
}

@keyframes upTip {
    0% {
        transform: translate(0, 0);
        opacity: 0.6;
    }
    100% {
        transform: translate(0, -40px);
        opacity: 1;
    }
}

#stage > * {
    margin: 0 auto;
}

#stage canvas {
    width: 100%;
    height: 100vh;
}

.audioBox {
    display: none;
}

#musicIcon {
    z-index: 9;
    width: 40px;
    height: 40px;
    position: absolute;
    right: 20px;
    top: 20px;
    border: none;
    background-size: cover;
    background-color: transparent;
}

.mplay {
    background-image: url("/images/musicon.png");
    animation: r360 2s infinite linear;
}

.mpause {
    background-image: url("/images/musicoff.png");
}

@keyframes r360 {
    0% {
        transform: rotate(0);
    }

    100% {
        transform: rotate(360deg);
    }
}

@media screen and (orientation: landscape) {
    .wrapper {
        width: 100vh;
        height: 100vw;
        transform: rotate(-90deg);
        transform-origin: 50vh 50vh;
    }

    #loader,
    #stage {
        height: 100%;
    }

    #stage canvas {
        height: 100%;
    }
}

#ewm {
    position: absolute;
    left: 50%;
    right: 50%;
    top: 25%;
    width: 200px;
    height: 200px;
    transform: translateX(-50%);
    display: none;
}