.banner{
  height: 460px;
  background-color: #FAEEE0;
}

.banner-inner{
  overflow: hidden;
  height: 100%;
  background: url(../static/why/banner_why.png) 100% no-repeat;
  background-size: 100% 100%;
}

.banner-title{
  font-family: AlibabaPuHuiTi_2_85_Bold;
  margin-top: 120px;
  font-size: 40px;
  color: #000000;
  line-height: 90px;
  letter-spacing: 4px;
  text-align: center;
  font-weight: bold;
}
.banner-desc{
  width: 600px;
  margin: 22px auto;
  font-weight: 400;
  font-size: 16px;
  color: #000000;
  line-height: 33px;
  text-align: center;
}
.his-out{
  padding: 37px 0;
  overflow: hidden;
}
.his-title{
  font-family: AlibabaPuHuiTi_3_105_Heavy;
  font-size: 34px;
  color: #FFFFFF;
  line-height: 51px;
  text-align: center;
}

.his-list{
  padding-left: 200px;
  margin-top: 15px;
  overflow: hidden;
  max-height: 720px;
}
.his-item-left-item.active{
  opacity: 100%;
}
.his-item-left-item.active .his-year{
  font-size: 24px;
  
}
.his-item-left-item::after{
  position: absolute;
  right: 5px;
  top: 0;
  content: " ";
  display: block;
  background: #FFF;
  width: 2px;
  height: 100%;
}
.his-item-left-item.active::before{
  content: " ";
  display: block;
  position: absolute;
  left: 130px;
  top: 24px;
  width: 117px;
  height: 1px;
  background: linear-gradient(223deg, rgba(200, 200, 200, 0), rgba(255, 255, 255, 1));
}
.his-item-left-item{
  position: relative;
  padding: 14px 0;
  opacity: 80%;
  cursor: pointer;
}
.his-year{
  width: 100px;
  font-size: 16px;
  color: #FFFFFF;
  line-height: 22px;
  flex-shrink: 0;
  text-align: right;
}
.his-dot{
  margin-top: 5px;
  margin-left: 20px;
  position: relative;
  width: 12px;
  height: 12px;
  background: rgba(255,255,255,0.47);
  border-radius: 50%;
  z-index: 1;
}
.his-dot-inner{
  width: 8px;
  height: 8px;
  background: #FFF;
  position: absolute;
  top: 2px;
  left: 2px;
  border-radius: 50%;
}
.his-item-right{
  margin-left: 140px;
  position: relative;
  top: -10px;
  transition: all 500ms;
}
.his-item-content{
  padding: 20px 0;
  cursor: pointer;
}
.his-item-content.active .his-item-content-year{
  opacity: 100%;
}
.his-item-content.active .his-item-content-desc{
  opacity: 100%;
}
.his-item-content-year{
  font-size: 24px;
  color: #FFFFFF;
  line-height: 22px;
  opacity: 60%;
}
.his-item-content-desc{

  margin-top: 5px;
  font-size: 16px;
  color: #FFFFFF;
  opacity: 60%;
}
.his-item-content-desc::before{
  content: " ";
}