在CSS中创建此形状(半管道形状)

.shape {
  width: 100px;
  height: 50px;
}

.shape::before, .shape::after {
  content: "";
  display: inline-block;
  width: 50px;
  height: 50px;
  border-radius: 50%;
}

.shape::before {
  background-color: #f00;
}

.shape::after {
  background-color: #0f0;
}

.shape::before {
  position: absolute;
  left: 0;
}

.shape::after {
  position: absolute;
  right: 0;
}

.shape {
  position: relative;
  overflow: hidden;
}