css 实现呼吸灯效果

先看效果：

动画的结果就想实在呼吸,完整的代码如下：

<template>
  <div class="container">
    <div class="long-breath"></div>
  </div>
</template>

<style  lang="less">
html, body{
  height: 100%;
  background-color: white;
}
.container{
  position: relative;
  width: 100%;
  height: 80px;
  .long-breath {
    position: absolute;
    width: 100px;
    left: 0;
    bottom: 0;
    animation: 2s shadowBreath ease-out infinite normal;
    background: #ffffff;
  }
}
@keyframes shadowBreath {
  0%,
  100% {
    box-shadow: 0 0 4px 1px rgba(42, 170, 255, 0.7);
  }
  50% {
    box-shadow: 0 0 20px 5px rgb(42, 170, 255);
  }
}
</style>