绘制具有一定阴影偏移的圆边平行四边形

.shape {
  position: relative;
  width: 200px;
  height: 100px;
  background-color: #ccc;
  box-shadow: 10px 10px 10px rgba(0, 0, 0, 0.5);
}

.shape:before {
  content: "";
  position: absolute;
  top: 0;
  left: -20px;
  width: 20px;
  height: 100%;
  background-color: #ccc;
  box-shadow: 10px 10px 10px rgba(0, 0, 0, 0.5);
  transform: skewX(-45deg);
}

.circle {
  position: relative;
  width: 200px;
  height: 200px;
  background-color: #ccc;
  border-radius: 50%;
  box-shadow: 10px 10px 10px rgba(0, 0, 0, 0.5);
}

.circle:before {
  content: "";
  position: absolute;
  top: 50%;
  left: -20px;
  width: 20px;
  height: 100px;
  background-color: #ccc;
  box-shadow: 10px 10px 10px rgba(0, 0, 0, 0.5);
  transform: skewX(-45deg);
}