body {  
    margin: 0;  
    background-color: #000;  
    overflow: hidden;  
}  
  
canvas {  
    display: block;  
    background-color: #06020A;
    /* 新增：滤镜可以让发光效果更明亮、色彩更饱和 */
    filter: brightness(1.2) saturate(1.1);
}