.mask-div {
  z-index: 188;
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.74);
}
.mask-div img {
  cursor: pointer;
  position: fixed;
  right: 5px;
  top: 5px;
}
.su-win {
  position: fixed;
  left: 50%;
  top: 50%;
  opacity: 0;
  transition: opacity 1s ease;
  width: 800px;
  height: 450px;
  opacity: 1;
  margin-left: -384px;
  margin-top: -204.5px;
}

.section-part-2 {
  padding-top: .9rem;
  height: 12.8rem;
  display:none;
}
.section-part-2 .section2-wrapper {
  width: 12.32rem;
  margin: 0 auto;
}
.section-part-2 .section2-wrapper .section-title {
  padding-bottom: .46rem;
  letter-spacing: .02rem;
  line-height: .3rem;
  text-align: center;
  color: rgba(0, 0, 0, 0.8);
}
.section-part-2 .section2-wrapper .spc-margin {
  margin-right: .32rem;
}
.section-part-2 .section2-wrapper .flex-area {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
}
.section-part-2 .section2-wrapper .flex-area .area {
  position: relative;
  width: 6.02rem;
  height: 5.81rem;
}
.section-part-2 .section2-wrapper .flex-area .area .img-area {
  cursor: pointer;
  position: relative;
  width: 100%;
  height: 3.86rem;
}
.section-part-2 .section2-wrapper .flex-area .area .img-area .mask {
  width: 100%;
  height: 100%;
  cursor: pointer;
  background-color: rgba(0, 0, 0, 0.35);
  opacity: 0;
}
.section-part-2 .section2-wrapper .flex-area .area .img-area .mask-arrow {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  opacity: 0;
}
.section-part-2 .section2-wrapper .flex-area .area .desc {
  position: absolute;
  top: 3.87rem;
}
.section-part-2 .section2-wrapper .flex-area .area .desc .title {
  color: rgba(0, 0, 0, 0.8);
  margin: .2rem 0 .15rem 0;
  letter-spacing: .01rem;
}
.section-part-2 .section2-wrapper .flex-area .area .desc .word {
  position: relative;
  margin-bottom: .08rem;
}
.section-part-2 .section2-wrapper .flex-area .area .desc .word p {
  letter-spacing: .01rem;
  display: inline-block;
  color: rgba(43, 39, 39, 0.6);
  text-indent: .17rem;
  line-height: .25rem;
}
.section-part-2 .section2-wrapper .flex-area .area .desc .word .dot {
  position: absolute;
  top: -0.03rem;
  color: rgba(43, 39, 39, 0.5);
}
.section-part-3 {
  padding-top: 1.1rem;
  min-height: 10.5rem;
}
.section-part-3 .section3-wrapper {
  width: 100%;
  margin: 0 auto;
}
.section-part-3 .section3-wrapper .section-title {
  padding-bottom: .46rem;
  letter-spacing: .02rem;
  line-height: .3rem;
  text-align: center;
  color: rgba(0, 0, 0, 0.8);
}
.section-part-3 .section3-wrapper .flex-inv {
  display: flex;
  flex-wrap: nowrap;
  justify-content: space-between;
}
.section-part-3 .section3-wrapper .flex-inv .inv {
  width: 100%;
}
.section-part-3 .section3-wrapper .flex-inv .inv img {
  cursor: pointer;
  width: 100%;
  height: 100%;
  transition: transform 0.28s cubic-bezier(0.51, 0.46, 1, 1) 0s;
}
.section-part-3 .section3-wrapper .flex-inv .inv .access {
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  position: relative;
}
.section-part-3 .section3-wrapper .flex-inv .inv .access .mask {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.35);
  opacity: 0;
}
.section-part-3 .section3-wrapper .flex-inv .inv .access .mask .desc {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 80%;
  line-height: .35rem;
  color: white;
  letter-spacing: .02rem;
}
.section-part-3 .section3-wrapper .flex-inv .inv .access .mask .desc .id-area {
  width: 100%;
  height: .5rem;
  margin-bottom: .1rem;
  position: relative;
}
.section-part-3 .section3-wrapper .flex-inv .inv .access .mask .desc .id-area .head {
  position: absolute;
  bottom: 0;
  width: .5rem;
  height: .5rem;
  border-radius: 50%;
  left: 0;
}
.section-part-3 .section3-wrapper .flex-inv .inv .access .mask .desc .id-area .name {
  float: left;
  margin-left: .55rem;
  margin-top: .1rem;
}
.section-part-3 .section3-wrapper .flex-inv .inv .access .mask .desc .title {
  text-decoration: underline;
}
.section-part-3 .section3-wrapper .flex-inv .inv .img {
  width: 25%;
  height: auto;
  margin-bottom: .26rem;
  overflow: hidden;
  float:left;
}
.section-part-3 .section3-wrapper .flex-inv .inv .img-01 {
  width: 99.9%;
  height: 5.19rem;
  margin-bottom: .26rem;
  overflow: hidden;
}
.section-part-3 .section3-wrapper .flex-inv .inv .img-02 {
  width: 99.9%;
  height: 5.22rem;
  margin-bottom: .26rem;
  overflow: hidden;
}
.section-part-3 .section3-wrapper .flex-inv .inv .img-03 {
  width: 99.9%;
  height: 4.89rem;
  overflow: hidden;
  margin-bottom: .26rem;
}
.section-part-3 .section3-wrapper .flex-inv .inv .img-04 {
  width: 99.9%;
  height: 3.92rem;
  margin-bottom: .26rem;
  overflow: hidden;
}
.section-part-3 .section3-wrapper .flex-inv .inv .img-05 {
  width: 99.9%;
  height: 5.19rem;
  overflow: hidden;
  margin-bottom: .26rem;
}
.section-part-3 .section3-wrapper .flex-inv .inv .img-06 {
  width: 99.9%;
  height: 5.88rem;
  overflow: hidden;
  margin-bottom: .26rem;
}
.section-part-3 .section3-wrapper .flex-inv .inv .img-07 {
  width: 99.9%;
  height: 5.2rem;
  overflow: hidden;
  margin-bottom: .26rem;
}
.section-part-4 .section4-wrapper {
  width: 12.32rem;
  margin: 0 auto;
  text-align: center;
}
.section-part-4 .section4-wrapper img {
  max-width: 100%;
}

.textCen{
  text-align: center;
}

.textCen .item{
  width: 3rem;
  display: inline-block;
  margin-right: 1rem;
  overflow: hidden;
  cursor: pointer;
}

.textCen .item:last-child{margin-right: 0}
.textCen .item img{
  width: 100%;
  transition: transform 0.28s cubic-bezier(0.51, 0.46, 1, 1) 0s;
}

@media screen and (max-width: 1440px) {
  .section-part-1 .txt .title-1 {
  }
  .section-part-1 .txt .desc {
    line-height: .43rem;
  }
}