css - 向下箭头周围具有波纹效果的多个环

Question

我已经能够用一个圆环围绕向下箭头创建波纹效果。

动画: https://rimildeyjsr.github.io/St.Anthony-Website/

我想扩展动画以包含三个具有相似动画的圆环。实现动画的最简单方法是什么？

.down-arrow {
  display: none;
  position: absolute;
  left: 0;
  right: 0;
  margin: 0 auto;
  top: 81.5%;
  z-index: 5;
  border-radius: 50%;
  height: 80px;
  width: 80px;
}
.ring {
  border: 2.5px solid white;
  -webkit-border-radius: 50%;
  height: 80px;
  width: 80px;
  position: absolute;
  left: 0;
  right: 0;
  top: 81%;
  z-index: 5;
  margin: 0 auto;
  -webkit-animation: pulsate 2s ease-out;
  -webkit-animation-iteration-count: infinite;
  -webkit-animation-delay: 2s;
  opacity: 0.0;
}
@-webkit-keyframes pulsate {
  0% {
    -webkit-transform: scale(0, 0);
    opacity: 1;
  }
  100% {
    -webkit-transform: scale(1.2, 1.2);
    opacity: 0;
  }
}

<img src="images/down-arrow.png" alt="down arrow for navigation" class="img-responsive down-arrow-page-one animated
                slideInDown">
<div class="ring"></div>

Answer 1

这里是一个变体的解决方案:

body {
    background-color: #668822;
}
.down-arrow {
  display: none;
  position: absolute;
  left: 0;
  right: 0;
  margin: 0 auto;
  top: 81.5%;
  z-index: 5;
  border-radius: 50%;
  height: 80px;
  width: 80px;
}
.ring {
  border: 2.5px solid white;
  -webkit-border-radius: 50%;
  height: 80px;
  width: 80px;
  position: absolute;
  left: 0;
  right: 0;
  top: 200px;
  z-index: 5;
  margin: 0 auto;
  -webkit-animation: pulsate 2s ease-out;
  -webkit-animation-iteration-count: infinite;
  -webkit-animation-delay: 2s;
  opacity: 0.0;
}
.ring2 {
  -webkit-animation-delay: 1.7s;
}
.ring3 {
  -webkit-animation-delay: 1.4s;
}
@-webkit-keyframes pulsate {
  0% {
    -webkit-transform: scale(0, 0);
    opacity: 1;
  }
  100% {
    -webkit-transform: scale(1.2, 1.2);
    opacity: 0;
  }
}

<img src="images/down-arrow.png" alt="down arrow for navigation" class="img-responsive down-arrow-page-one animated
                slideInDown">
<div class="ring"></div><div class="ring ring2"></div><div class="ring ring3"></div>

此外，您还可以延迟出现圆圈。