css - 溢出:隐藏属性不适用于伪类前后

Question

基本上，我正在尝试创建一个六边形形状，它内部有一个圆圈，圆圈的多余部分应该被隐藏。演示:https://codepen.io/AskSaikatSinha/pen/jwXNPJ?editors=1100

我的 HTML:

<div class="container">
  <div class="radius-rect"></div>
  <div class="hex">
    <div id="hexagon" >
      <div class="semi-cir" ></div>
    </div>
  </div>  
</div>

我的 CSS:

#hexagon {
    width: 100px;
    height: 55px;
    background: #0088CD;
    position: absolute;
  border-top: 1px solid #0088CD;
  border-bottom: 1px solid #0088CD;
  border-radius: 2px;

}
#hexagon:before {
    content: "";
    position: absolute;
    top: -25px;
    left: 0;
    width: 0;
    height: 0;
    border-left: 50px solid transparent;
    border-right: 50px solid transparent;
    border-bottom: 25px solid #0088CD;
  border-radius: 2px;

}
#hexagon:after {
    content: "";
    position: absolute;
    bottom: -25px;
    left: 0;
    width: 0;
    height: 0;
    border-left: 50px solid transparent;
    border-right: 50px solid transparent;
    border-top: 25px solid #0088CD;
  border-radius: 2px;
}
.semi-cir{
  position: relative;
  left: 10px;
  background-color:#00A9F1;
  height:100px;
  width:100px;
  -webkit-border-radius:75px;
  -moz-border-radius:75px;
  z-index: 1;
  overflow: hidden;
}

溢出:隐藏没有任何影响。

Answer 1

尽量给背景色与给“半圆形”的背景色一样。在您提供的链接上应用了相同的技巧:https://codepen.io/AskSaikatSinha/pen/jwXNPJ?editors=1100

#hexagon {
    width: 100px;
    height: 55px;
    background: #0088CD;
    position: absolute;
    top:50px;
    left:50px;
  border-top: 1px solid #0088CD;
  border-bottom: 1px solid #0088CD;
  border-radius: 2px;

}
#hexagon:before {
    content: "";
    position: absolute;
    top: -25px;
    left: 0;
    width: 0;
    height: 0;
    border-left: 50px solid transparent;
    border-right: 50px solid transparent;
    border-bottom: 25px solid #0088CD;
  border-radius: 2px;

}
#hexagon:after {
    content: "";
    position: absolute;
    bottom: -25px;
    left: 0;
    width: 0;
    height: 0;
    border-left: 50px solid transparent;
    border-right: 50px solid transparent;
    border-top: 25px solid #0088CD;
  border-radius: 2px;
}
.semi-cir{
  position: relative;
  left: 10px;
  background-color:#00A9F1;
  height:100px;
  width:100px;
  -webkit-border-radius:75px;
  -moz-border-radius:75px;
  z-index: 1;
  overflow: hidden;
}
.radius-rect{
  height:200px;
  background:#00a9f1;
}

<div class="container">
  <div class="radius-rect"></div>
  <div class="hex">
    <div id="hexagon" >
      <div class="semi-cir" ></div>
    </div>
  </div>  
</div>