learn C++ NO.14——stack/queue/deque

<view class="wave-container" style="position:relative">

    <view class="wave"></view>
    <view class="wave"></view>
     <view class="wave"></view>
  </view>

/* 容器样式 */
.wave-container {
  position: relative;
  width:100%;
  height: 200px;
  display: flex;
  justify-content: center;
  align-items: center;

}

/* 波纹动画样式 */
.wave {
  position: absolute;
  width: 50px;
  height: 50px;
  border: 2px solid rgba(0, 150, 255, 0.7);
  border-radius: 50%;
  animation: earthquake-wave 2s infinite ease-out;
  opacity: 0;
}

/* 波的动画效果 */
@keyframes earthquake-wave {
  0% {
    width: 80rpx;
    height: 80rpx;
    opacity: 1;
  }
  50% {
    opacity: 0.5;
  }
  100% {
    width: 200px;
    height: 200px;
    opacity: 0;
  }
}

/* 让不同波纹稍微延迟一点 */
.wave:nth-child(2) {
  animation-delay: 0.3s;
}
.wave:nth-child(3) {
  animation-delay: 0.6s;
}