.About-us .app {
  float: left;
}
.About-us .tab {
  float: left;
  width: 25%;
  /* margin-left: 100px; */
}
.layui-nav-tree .layui-nav-child dd.layui-this,
.layui-nav-tree .layui-nav-child dd.layui-this a,
.layui-nav-tree .layui-this,
.layui-nav-tree .layui-this > a,
.layui-nav-tree .layui-this > a:hover {
  background-color: #fff;
  color: #E50012;
}
.layui-nav .layui-nav-child dd.layui-this a,
.layui-nav-child dd.layui-this {
  background-color: #fff;
  color: #E50012;
}
element.style {
  color: #000000;
}
.layui-nav-tree .layui-nav-item a {
  position: relative;
  height: 45px;
  line-height: 45px;
  text-overflow: ellipsis;
  overflow: hidden;
  white-space: nowrap;
}
.layui-nav .layui-nav-item a {
  display: block;
  padding: 0 80px;
  color: #666;
  transition: all 0.3s;
  -webkit-transition: all 0.3s;
  background-color: #fff;
}
.layui-nav-tree .layui-nav-bar {
  width: 5px;
  height: 0;
  background-color: #E50012;
}
.layui-nav-bar {
  z-index: 1000;
}
.layui-nav .layui-this:after,
.layui-nav-bar,
.layui-nav-tree .layui-nav-itemed:after {
  position: absolute;
  left: 0;
  top: 0;
  width: 0;
  height: 5px;
  background-color: #E50012;
  transition: all 0.2s;
  -webkit-transition: all 0.2s;
}
.layui-nav .layui-nav-more {
  content: '';
  width: 0;
  height: 0;
  border-style: solid dashed dashed;
  border-color: #000 transparent transparent;
  overflow: hidden;
  cursor: pointer;
  transition: all 0.2s;
  -webkit-transition: all 0.2s;
  position: absolute;
  top: 50%;
  right: 3px;
  margin-top: -4px;
  border-width: 6px;
  border-top-color: #000;
}
.layui-nav .layui-nav-mored,
.layui-nav-itemed > a .layui-nav-more {
  margin-top: -9px;
  border-style: dashed dashed solid;
  border-color: transparent transparent #000;
}
.layui-nav-itemed > a,
.layui-nav-tree .layui-nav-title a,
.layui-nav-tree .layui-nav-title a:hover {
  color: #000000!important;
}
.layui-nav-tree .layui-nav-item a:hover {
  background-color: #fff;
  color: #E50012;
}
.About-us {
  height: 850px;
  padding: 52px 00px;
}
.About-us .app {
  float: right;
  width: 70%;
  /* margin-right: 100px; */
}
.About-us .app .safe .safe-1 {
  width: 95%;
  height: 100%;
  padding: 32px 22px;
}
.About-us .app .safe .safe-1 .safe-w p {
  text-indent: 2em;
  font-size: 14px;
  font-family: Source Han Sans SC;
  font-weight: 400;
  color: #333333;
  line-height: 38px;
}
.About-us .app .safe .safe-1 .safe-t {
  width: 100%;
  height: 212px;
  margin-bottom: 34px;
}
.About-us .app .safe .safe-1 .safe-t img {
  float: left;
  margin-left: 20px;
}
.About-us .app .safe .safe-1 span {
  display: block;
  width: 100%;
  text-align: center;
}
.About-us .app .advantage .advantage-1 {
  height: 86px;
  width: 100%;
}
.About-us .app .advantage  .advantage-platform {
  height: 86px;
  width: 33%;
  float: left;
  
}

.About-us .app .advantage .advantage-1 .advantage-2 {
  font-size: 14px;
  font-family: hzgb;
  font-weight: 400;
  color: #ffffff;
  text-align: center;
  float: left;
  width: 64px;
  height: 64px;
  background: #fb9400;
  border-radius: 50%;
  margin: 0 19px;
  line-height: 64px;
  margin-top: 10px;
}
.About-us .app .advantage .advantage-1 .advantage-2 span {
  display: block;
  margin-top: 12px;
}
.About-us .app .advantage .advantage-1 .advantage-3 {
  float: left;
  width: 40%;
  font-size: 14px;
  font-family: Source Han Sans SC;
  font-weight: 400;
  color: #333333;
  line-height: 84px;
}
.About-us .app .objects .objects-1 li {
  float: left;
  padding: 11px 23px;
  background-color: #EEEEEE;
  margin-left: 69px;
  margin-top: 38px;
  border-left: 4px solid #FB9400;
}