.index-banner .layer {
  top: -999px;
}
.aboutcontent {
  padding-top: 90px;
  padding-bottom: 30px;
  width: 1290px;
  margin: 0 auto;
  display: flex;
}
.aboutcontent .aboutcontent-left {
  flex: 2;
}
.aboutcontent .aboutnavbox {
  border: none;
  margin: 20px 0;
  padding-top: 15px;
  border-right: 1px solid #e6e6e6;
  list-style: none;
  position: relative;
  margin: 0;
  padding-left: 0;
  background-color: #fff;
  min-height: 500px;
}
.aboutcontent .aboutnavbox .lefnav {
  line-height: 52px;
  font-size: 14px;
  color: #303133;
  list-style: none;
  cursor: pointer;
  text-align: right;
  -webkit-transition: border-color 0.3s, background-color 0.3s, color 0.3s;
  transition: border-color 0.3s, background-color 0.3s, color 0.3s;
  -webkit-box-sizing: border-box;
  box-sizing: border-box;
  white-space: nowrap;
  font-weight: bold;
}
.aboutcontent .aboutnavbox .lefnav .lefnav-text {
  display: block;
  height: 52px;
  width: 100%;
}
.aboutcontent .aboutnavbox .lefnav .lefnav-text:hover,
.aboutcontent .aboutnavbox .lefnav .lefnav-text.active {
  color: #462e2e;
  background-color: rgba(178, 178, 174, 0.1) !important;
}
.aboutcontent .aboutnavbox .lefnav .navico {
  display: block;
  width: 20px;
  height: 52px;
  float: right;
}
.aboutcontent .aboutnavbox .lefnav .iconfont {
  margin-left: 10px;
  margin-right: 10px;
  width: 20px;
  height: 52px;
  display: block;
  float: right;
  transition: all 0.3s ease;
}
.aboutcontent .aboutnavbox .lefnav .rotate {
  transform: rotate(180deg);
  /* 这里的角度可以根据需要进行调整 */
  transition: transform 0.3s ease;
  /* 这里可以添加过渡效果，使旋转更加平滑 */
}
.aboutcontent .aboutnavbox .lefnav.menuli:hover,
.aboutcontent .aboutnavbox .lefnav.active {
  color: #462e2e;
  background-color: rgba(178, 178, 174, 0.1) !important;
}
.aboutcontent .aboutnavbox .lefnav .childnav {
  padding: 0;
  margin: 0;
  text-align: left;
  font-weight: normal;
}
.aboutcontent .aboutnavbox .lefnav .childnav li {
  padding-left: 20px;
  height: 52px;
}
.aboutcontent .aboutnavbox .lefnav .childnav li.menuli:hover,
.aboutcontent .aboutnavbox .lefnav .childnav li.active {
  color: #462e2e;
  background-color: rgba(178, 178, 174, 0.1) !important;
}
.aboutcontent .grap {
  width: 20px;
}
.aboutcontent .aboutcontent-right {
  flex: 8;
  background-color: #fff;
  min-height: 500px;
  padding: 25px 88px 45px;
}
.aboutcontent .aboutcontent-right .about-tit {
  color: #4a4a4a;
  font-weight: 700;
  font-size: 16px;
}
.aboutcontent .aboutcontent-right p {
  color: #888;
  margin-top: 20px;
  font-size: 14px;
  line-height: 22px;
}