body {
  background: #000;
  overflow: hidden;
  margin: 0;
}

/* 爱心上方的祝福文字 */
#greeting {
  position: fixed;
  top: 8%;
  left: 0;
  width: 100%;
  text-align: center;
  color: #ff77ae;
  font-size: 3rem;
  font-weight: bold;
  font-family: "PingFang SC", "Microsoft YaHei", "STHeiti", sans-serif;
  letter-spacing: 0.15em;
  text-shadow:
    0 0 12px rgba(255, 119, 174, 0.9),
    0 0 30px rgba(255, 23, 117, 0.6),
    0 0 60px rgba(255, 23, 117, 0.4);
  z-index: 10;
  pointer-events: none;
  user-select: none;
}