* {
    padding: 0;
    margin: 0;
}

html,
body {
    color: #000;
    overflow: hidden;
    height: 100%;
    font-size: 16px;
}
canvas {
    touch-action-delay: none;
    touch-action: none;
    -ms-touch-action: none;
}
li {
    list-style: none;
}
.tip {
    background-color: rgba(0, 0, 0, 0.7);
    width: 50%;
    height: 40px;
    text-align: center;
    font-size: 20px;
    line-height: 40px;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    border-radius: 6px;
    display: none;
    z-index: 99998;
    color: #fff;
}
.loading {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    display: none;
    background-color: rgba(0, 0, 0, 0.8);
    z-index: 99999;
}
.loading img {
    position: absolute;
    width: 40px;
    height: 40px;
    display: block;
    margin-left: -20px;
    margin-top: -20px;
    top: 50%;
    left: 50%;
    animation: loadr 800ms ease-in-out infinite;
}
@keyframes loadr {
    0% {
        transform: rotate(0deg);
    }
    100% {
        transform: rotate(360deg);
    }
}