.about-history {
  width: 100%;
  /*height: 27.8rem;*/
  overflow: hidden;
  background: url(../assets/images/bg_building.png);
  background-repeat: no-repeat;
  background-size: 100% 100%;
  -webkit-background-size: 100% 100%;
  -o-background-size: 100% 100%;
  background-position: center 0;
}

.about-history .history-title {
  width: 100%;
  height: 1rem;
  line-height: 1rem;
  font-size: 0.96rem;
  font-weight: 700;
  font-family: FangZheng_JIAN;
  color: #2C2C2C;
  text-align: center;
  margin: 0.8rem 0 2.7rem;
}

.about-history .development {
  width: 24.3rem;
  height: 38.9rem;
  /*margin-top: 2.7rem;*/
  margin: 2.7rem auto 5rem;
  position: relative;
  /*background: url(../assets/images/development_line.png);*/
  background: url(../assets/images/development_line2.png);
  background-repeat: no-repeat;
  background-size: 100% 40.2rem;
  /*-webkit-background-size: 100% 150%;*/
  /*-o-background-size: 100% 150%;*/
  background-position: bottom center;
}

.development-item {
  position: absolute;
  width: auto;
  font-family: FangZheng_JIAN;
}

.development-item img {
  width: 0.44rem;
  height: 0.44rem;
  position: absolute;
}

.development-item:nth-child(1) {
  left: -0.06rem;
  bottom: -3.6rem;
}

.development-item:nth-child(2) {
  left: 3.3rem;
  bottom: 1rem;
}

.development-item:nth-child(1) img,
.development-item:nth-child(3) img,
.development-item:nth-child(5) img,
.development-item:nth-child(6) img {
  left: 0;
  top: 0;
}

.development-item:nth-child(2) img {
  left: 0.4rem;
  bottom: 0;
}

.development-item:nth-child(3) {
  left: 8.74rem;
  /*top: 15.9rem;*/
  bottom: -1.65rem;
}

.development-item:nth-child(4) {
  left: 12.2rem;
  /*top: 10.52rem;*/
  bottom: 4.2rem;
}

.development-item:nth-child(4) img {
  left: 1.44rem;
  bottom: 0;
}

.development-item:nth-child(5) {
  left: 17.36rem;
  bottom: 1.3rem;
}

.development-item:nth-child(6) {
  left: 23.08rem;
  bottom: 5.5rem;
}

.development-item:nth-child(7) {
  left: 18.1rem;
  bottom: 14rem;
}

.development-item:nth-child(7) img,
.development-item:nth-child(9) img, 
.development-item:nth-child(11) img {
  left: 0;
  bottom: 0;
}

.development-item:nth-child(8) {
  left: 12.56rem;
  bottom: 13.6rem;
}

.development-item:nth-child(8) img,
.development-item:nth-child(10) img{
  left: 2.26rem;
  top: 0;
}

.development-item:nth-child(9) {
  left: 12.4rem;
  bottom: 18.8rem;
}

.development-item:nth-child(10) {
  left: 4.9rem;
  bottom: 16.7rem;
}


.development-item:nth-child(11) {
  left: 0.7rem;
  bottom: 25.3rem;
}

.development-item:nth-child(12) {
  left: 3rem;
  bottom: 29.8rem;
}
.development-item:nth-child(12) img{
  right: 3rem;
  bottom: -0.5rem;
}

.development-item:nth-child(13) {
  left: 10.7rem;
  bottom: 28.1rem;
}
.development-item:nth-child(13) img{
  left: 0;
  top: -0.5rem;
}

.development-item:nth-child(14) {
  left: 12.2rem;
  bottom: 36rem;
}
.development-item:nth-child(14) img{
   right: 4rem;
   bottom: -0.5rem;
 }
.history-item-outline.flex-column-reverse {
  display: flex;
  display: -webkit-flex;
  flex-direction: column-reverse;
}

.history-item-outline .year {
  width: 2.4rem;
  color: #3F4040;
  font-size: 0.6rem;
  margin: .8rem .3rem 0 0;
}

.development-item:hover .year {
  border-radius: 0.06rem;
  text-align: center;
  background-color: rgba(204, 204, 204, .4);
}

.development-item:hover img {
  width: 0.48rem;
  height: 0.48rem;
}

.history-item-outline.flex-row-align .year {
  margin: 0 .3rem 0 0;
}

.history-item-outline.flex-column-reverse .year {
  margin: 0 .3rem .8rem 0;
}

.history-item-outline .info {
  min-height: 1.72rem;
  margin: 0.2rem 0;
}

.history-item-outline .info .title {
  width: 3.2rem;
  height: 0.8rem;
  line-height: 0.8rem;
  padding-left: .4rem;
  color: #FFFFFF;
  font-size: 0.48rem;
  margin-bottom: 0.5rem;
  background: url(../assets/images/bg_title.png);
  background-repeat: no-repeat;
  background-size: 100% 100%;
  -webkit-background-size: 100% 100%;
  -o-background-size: 100% 100%;
  background-position: center 0;
}

.history-item-outline .info .detail {
  width: 6rem;
  color: #000000;
  font-size: 0.32rem;
  min-height: 0.48rem;
  line-height: 0.48rem;
  margin-bottom: 0.02rem;
  padding-left: .3rem;
}

.history-item-outline .info .detail li::marker {
  color: #A8A8A8;
}

.history-item-outline .info .detail li:hover {
  border-radius: 0.06rem;
  padding-left: 0.08rem;
  background-color: rgba(204, 204, 204, .4);
}