.about {
  background-color: #f5f5f5;
}
.index-banner img {
  max-height: 500px;
}
.info-content .img-box {
  width: calc(50% - 20px);
  float: left;
  margin-right: 40px;
}
.info-content .img-box:last-child {
  margin-right: 0;
}
.info-content .img-box img {
  max-height: 360px;
}
@media (max-width: 768px) {
  .info-content .img-box {
    width: 100%;
    float: unset;
    margin: 0;
    margin-bottom: 15px;
  }
}