如何在CSS中添加闪光效果

.shine {
  position: relative;
  overflow: hidden;
}

.shine::before {
  content: "";
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: linear-gradient(45deg, rgba(255, 255, 255, 0) 0%, rgba(255, 255, 255, 0.8) 50%, rgba(255, 255, 255, 0) 100%);
  transform: rotate(-45deg);
  animation: shine 2s infinite;
}

@keyframes shine {
  0% {
    transform: translateX(-150%);
  }
  100% {
    transform: translateX(150%);
  }
}

<div class="shine">
  <!-- 内容 -->
</div>