.rain-container {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 1;
}

.raindrop {
  position: absolute;
  width: 3px;
  background: linear-gradient(transparent, rgba(0, 0, 0, 0.5));
  border-radius: 50%;
  animation: rain linear infinite;
  box-shadow: 0 0 2px rgba(0, 0, 0, 0.2);
}

@keyframes rain {
  0% {
    transform: translateY(-100vh);
  }
  100% {
    transform: translateY(100vh);
  }
}

/* 深色主题下的雨滴样式 */
body.dark-theme .raindrop {
  background: linear-gradient(transparent, rgba(255, 255, 255, 0.5));
  box-shadow: 0 0 2px rgba(255, 255, 255, 0.2);
}