/* 让网页背景变黑，更像一个展厅 */
body {
    margin: 0;
    padding: 0;
    overflow: hidden;
    background-color: #7fb3e6;
    font-family: sans-serif;
}

/* 加载动画的样式 */
#loading {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: #ffffff;
    font-size: 1.2rem;
    z-index: 100;
}

/* 画布填满屏幕 */
canvas {
    display: block;
    width: 100vw;
    height: 100vh;
    background: transparent;
}