html - 将一个div元素均匀叠加在其他两个元素上

使用此当前实现，当页面调整大小或在移动视图中时，circle元素将在页面上移动。我需要将圆形永久固定在绿色和白色div元素之间的位置。

.circle {
  border-radius: 50%;
  background-color: white;
  border: 4px solid pink;
  width: 40px;
  height: 40px;
  position: absolute;
  left: 46%;
  vertical-align: middle;
  top: 26px;
  z-index: 999;
}

.green {
  width: 100%;
  position: relative;
  background-color: green;
  padding: 20px;
}

.white {
  width: 100%;
  background-color: white;
  position: relative;
  padding: 20px;
}

<div>
  <div class="green"></div>
  <div class="circle"></div>
  <div class="white"></div>
<div>

最佳答案

我建议将圆圈移动到绿色部分内并与底部对齐，或使用::after。这种方法保证了圆始终会居中。
在这里我使用`:: after'是因为空元素不好，为此目的存在伪元素。

* {
box-sizing: border-box;
}
html,
body {
  margin: 0;
  padding: 0;
}
.green {
  width: 100%;
  position: relative;
  background-color: green;
  padding: 20px 20px 40px;
}
.green::after {
  content: '';
  display: block;
  border-radius: 50%;
  background-color: white;
  border: 4px solid pink;
  width: 40px;
  height: 40px;
  position: absolute;
  left: 50%;
  bottom: 0;
  transform: translate3d(-50%, 50%, 0);
  z-index: 100;
}

.white {
  width: 100%;
  background-color: white;
  position: relative;
  padding: 40px 20px 20px;
}

<div>
  <div class="green">Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged. It was popularised in the 1960s with the release of Letraset sheets containing Lorem Ipsum passages, and more recently with desktop publishing software like Aldus PageMaker including versions of Lorem Ipsum.</div>
  <div class="white">Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged. It was popularised in the 1960s with the release of Letraset sheets containing Lorem Ipsum passages, and more recently with desktop publishing software like Aldus PageMaker including versions of Lorem Ipsum.</div>
<div>