您也可以使用svg代替图像映射。

.hover_group:hover {
  opacity: 1;
}
#projectsvg {
  position: relative;
  width: 100%;
  padding-bottom: 77%;
  vertical-align: middle;
  margin: 0;
  overflow: hidden;
}
#projectsvg svg {
  display: inline-block;
  position: absolute;
  top: 0;
  left: 0;
}

<figure id="projectsvg">
  <svg version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" viewBox="0 0 1920 1080" preserveAspectRatio="xMinYMin meet" >
<!-- set your background image -->
<image width="1920" height="1080" xlink:href="http://placehold.it/1920x1080" />
<g class="hover_group" opacity="0">
  <a xlink:href="https://example.com/link1.html">
    <text x="652" y="706.9" font-size="20">First zone</text>
    <rect x="572" y="324.1" opacity="0.2" fill="#FFFFFF" width="264.6" height="387.8"></rect>
  </a>
</g>
<g class="hover_group" opacity="0">
  <a xlink:href="https://example.com/link2.html">
    <text x="1230.7" y="952" font-size="20">Second zone</text>
    <rect x="1081.7" y="507" opacity="0.2" fill="#FFFFFF" width="390.2" height="450"></rect>
  </a>
</g>
  </svg>
</figure>