.about-banner {
  background: url(../images/about_banner.png) center no-repeat;
  height: 350px;
}
.about-banner .gm {
  height: inherit;
  max-width: 1300px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  color: black;
}
.about-banner h2 {
  font-size: 40px;
  font-family: "SourceHanSansCN-Bold";
  margin-bottom: 15px;
}
.about-banner span {
  font-size: 20px;
  font-family: "SourceHanSansCN-Regular";
  text-transform: uppercase;
}
.about-menu {
  margin-top: -20px;
}
.about-menu > ul {
  height: 80px;
  width: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: #56aab7;
}
.about-menu > ul > li {
  width: 25%;
  text-align: center;
}
.about-menu > ul > li > a {
  font-size: 20px;
  color: white;
  position: relative;
}
.about-menu > ul > li > a img {
  position: absolute;
  bottom: -60%;
  left: 40%;
  display: none;
}
.about-menu > ul > li.on img {
  display: block;
}
.about .gm {
  padding-top: 90px;
  padding-bottom: 80px;
  width: 67.708%;
  max-width: 1300px;
  margin: 0 auto;
}
.about-top {
  display: grid;
  grid-template-columns: auto 25.846%;
  grid-column-gap: 6%;
  align-items: center;
}
.about-top .left h4 {
  font-size: 18px;
  letter-spacing: -0.2px;
  text-transform: uppercase;
}
.about-top .left h3 {
  font-size: 40px;
  color: #56aab7;
  margin-top: 15px;
  margin-bottom: 40px;
}
.about-top .left p {
  font-size: 18px;
  line-height: 1.5;
  margin-bottom: 40px;
}
.about-top .right ul li {
  padding: 10px;
  border-bottom: 1px solid #7c7c7c;
  margin-bottom: 30px;
}
.about-top .right ul li:last-child {
  margin-bottom: 0;
}
.about-top .right span {
  font-size: 60px;
  font-weight: bold;
  color: #56aab7;
}
.about-top .right i {
  font-style: normal;
  font-family: 'Arial';
  font-weight: lighter;
  font-size: 14px;
  color: #56aab7;
}
.about-top .right p {
  letter-spacing: 2px;
}
.about-list {
  margin-top: 110px;
}
@media screen and (max-width:768px) {
   .about .gm{ width:95%; }
}
@media screen and (max-width:520px) {
.about-banner{ height:250px; }
.about-menu > ul{ width:100%; justify-content:space-around; }
 .about .gm{ padding:40px 0px; }
.about-top{ display:block; }
.about-top .right ul{ display:grid; grid-template-columns:50% 50%; }
.about-top .right ul li{ margin-bottom:0px; }
.about-top .left p{ margin-bottom:20px; }
.about-list{ margin-top:40px; }
.about-top .left h3{ font-size:30px; }
}