如何在电子窗口上制作上箭头？

<div class="arrow-container">
  <div class="arrow"></div>
</div>

.arrow-container {
  width: 100px;
  height: 100px;
  position: relative;
}

.arrow {
  width: 0;
  height: 0;
  border-left: 50px solid transparent;
  border-right: 50px solid transparent;
  border-bottom: 50px solid #000;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

.arrow:hover {
  /* 添加动画效果，例如改变箭头的颜色 */
  background-color: red;
  transition: background-color 0.5s;
}