.logo {
    position: relative;
    display: inline-block;
    max-width: 100%;}
.responsive-image {
  display: block;
  max-width: 100%;
  height: auto;}

.image-map {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;}

.hotspot {
  fill: transparent;
  stroke: transparent; /* 调试时可设置为可见颜色 */
  cursor: pointer;}

.hotspot:hover {}