将光标悬停在图像上后，箭头必须出现在左侧和右侧

<div class="image-container">
  <img src="your-image.jpg" alt="Your Image">
  <div class="arrow-left"></div>
  <div class="arrow-right"></div>
</div>

.image-container {
  position: relative;
  display: inline-block;
}

.arrow-left,
.arrow-right {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 20px;
  height: 20px;
  background-color: #000;
  opacity: 0;
  transition: opacity 0.3s;
}

.arrow-left {
  left: 0;
}

.arrow-right {
  right: 0;
}

.image-container:hover .arrow-left,
.image-container:hover .arrow-right {
  opacity: 1;
}