body {
  max-width: 100vw;
  overflow-x: hidden;
}
.flex {
  display: flex;
}
.item-center {
  align-items: center;
}
.justify-center {
  justify-content: center;
}
.bt-50 {
  margin-top: 50rem;
}
.main {
  padding-top: 80rem;
}
.main .bg-line {
  height: 100%;
  width: 100%;
  position: absolute;
  z-index: 1;
}
.main .bg-line span {
  display: inline-block;
  height: 100%;
  width: 2px;
  margin-left: 209rem;
  border-right: solid 2rem #996724;
  opacity: 0.2;
}
.legacy-title {
  height: 53rem;
  opacity: 1;
  color: #9a3312ff;
  font-size: 48rem;
  font-weight: 400;
  font-family: "FZ";
  text-align: center;
  margin-top: 96rem;
}
.text-center {
  text-align: center;
}
.floor-1 p,
.floor-2 p {
  width: 1004rem;
  color: #5e4a23ff;
  font-size: 20rem;
  font-family: "PingFang SC";
  text-align: left;
  line-height: 1.6;
  margin: 0 auto;
  text-indent: 35rem;
  margin-top: 80rem;
}
.floor-1 {
  padding-top: 1rem;
  margin-top: 35rem;
  padding-bottom: 80rem;
  background-color: rgba(153, 103, 36, 0.15);
  position: relative;
  overflow: hidden;
}
.floor-1 p {
  position: relative;
  z-index: 9;
}
.floor-1 .btn-wrap {
  margin-top: 80rem;
  text-align: center;
}
.floor-1 .btn-wrap img {
  width: 210rem;
  height: 70rem;
  opacity: 1;
  position: relative;
  z-index: 9;
}
.floor-1 .center-img {
  margin-left: 45rem;
  margin-right: 45rem;
}
.floor-1 .center-img img {
  width: 762rem;
  height: 488rem;
  position: relative;
  z-index: 9;
}
.floor-2 {
  margin-bottom: 197rem;
}
.floor-2 .content {
  margin-top: 36rem;
  padding-bottom: 80rem;
  background-color: rgba(153, 103, 36, 0.15);
}
.floor-2 p {
  padding-top: 50rem;
  margin-top: 0;
}
.section {
  display: flex;
  justify-content: flex-start;
  padding-top: 80rem;
}
.section .title {
  width: 50vw;
  height: 32rem;
  display: flex;
  align-items: center;
  margin-bottom: 16rem;
  position: relative;
}
.section .text {
  padding: 0;
  margin: 0;
  position: absolute;
  top: 0;
  right: -70rem;
  text-align: right;
  color: #996724ff;
  font-size: 24rem;
  font-family: "PingFang SC";
  opacity: 0;
  width: 50rem;
}
.section .effect {
  position: absolute;
  left: 0;
  right: 0;
  width: 100%;
  height: 32rem;
}
.section .dashed {
  height: 2rem;
  width: 55vw;
  position: absolute;
  top: 15rem;
  right: 0;
}
.section .dashed::after {
  content: ' ';
  height: 100%;
  width: 0;
  float: left;
  background: url('/expert/web/icon/dashed.png') repeat-x center left;
  background-size: 10rem 2rem;
  transition: 0s ease-in;
}
.section .ball {
  background-color: rgba(153, 103, 36, 0.5);
  display: block;
  overflow: hidden;
  border-radius: 100%;
  width: 32rem;
  height: 32rem;
  position: absolute;
  opacity: 0;
  transition: 0s ease-in;
  left: 100%;
  top: 0;
}
.section .ball::after {
  content: ' ';
  width: 14rem;
  height: 14rem;
  background-color: #996724;
  display: block;
  overflow: hidden;
  border-radius: 100%;
  position: absolute;
  left: 9rem;
  top: 9rem;
}
.section.right .title {
  left: calc(50vw - 16rem);
}
.section.right .text {
  text-align: left;
  margin-right: 0;
  width: 50rem;
  text-indent: 0;
  position: absolute;
  left: -70rem;
}
.section.right .effect {
  position: relative;
  left: 0;
  flex: 1;
  margin: 0;
  width: 100%;
}
.section.right .dashed {
  height: 2rem;
  position: absolute;
  top: 15rem;
  left: 12rem;
  right: 0;
}
.section.right .dashed::after {
  float: right;
}
.section.right .ball {
  left: 16rem;
}
.current .effect .dashed::after {
  width: 100%;
  transition: 0.5s ease-in 0.5s;
}
.current .effect .ball {
  opacity: 1;
  transition: 0.5s ease-in 1s;
}
.current .text {
  opacity: 1 !important;
  transition: 0.8s ease-in 1.2s;
}