/* 背景和覆盖层模块 */
.overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(255, 0, 128, 0.2) 0%, rgba(0, 128, 255, 0.2) 100%);
    backdrop-filter: blur(5px);
    z-index: -1;
}

/* 烟花Canvas模块 */
#fireworks-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 5;
}