.about-content {
  position: relative;
}
.about-content img {
  width:100%;
}
.sideBar {
  width: 95px;
  position: fixed;
  top:205px;
  left: 180px;
  border-radius: 8px;
  z-index: 10;
  overflow: hidden;
}
.sideBar .logo {
  width: 100%;
  height: 48px;
  background-image: url(../image/kefu.png);
  background-repeat: no-repeat;
  background-color:#2e89dc;
  background-position: 2px -20px;
  background-size: 100%;
}
.sideBar li {
  font-size: 16px;
  height: 40px;
  line-height: 40px;
  text-align: center;
  border-bottom: 1px dotted #fff;
  background: #7BB1E1;
  color:#285B8E;
  cursor: pointer;
}
.sideBar .qrCode {
  text-align: center;
  background-color:#2e89dc;
  padding-bottom: 8px;
  color: #fff;
}
.sideBar .qrCode img{
  width: 80px;
  height: 80px;
  padding: 6px;
  background: #fff;
  margin-bottom:14px;
  margin-top: 6px;
}
@media screen and (max-width: 1400px) {
  .sideBar {
    left: 0;
  }
}