#snow-layer {
    position: fixed !important;
    top: 0 !important;
    left: 0 !important;
    width: 100vw !important;
    height: 100vh !important;

    z-index: 2147483647 !important; /* JS 最大安全值 */
    pointer-events: none !important;
}

#snow-layer > canvas {
    position: fixed !important;
    top: 0 !important;
    left: 0 !important;
    width: 100% !important;
    height: 100% !important;
}