/* 落花层在页面内容之上（pointer-events 关闭，不挡点击） */
#petal-container {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 5000;
  overflow: hidden;
}

.falling-petal {
  position: absolute;
  left: 0;
  top: 0;
  will-change: transform, opacity;
  background-repeat: no-repeat;
  background-position: center;
  background-size: contain;
  filter: drop-shadow(0 1px 2px rgba(0, 0, 0, 0.35));
}