body {
  background: #ffffff;
}

.about_banner {
  width: 100%;
  background: url(../img/aboutus/aboutus.png) 50%/cover no-repeat;
  height: 28.13rem;
}

.about_banner .content {
  height: 100%;
  position: relative;
}

.about_banner h3 {
  font-family: 'ArialMTBold';
  font-size: 1.5rem;
  line-height: 3rem;
  color: #ffffff;
  position: absolute;
  left: 0;
  bottom: 5.5rem;
}

.tab_nav {
  width: 100%;
  height: 5rem;
  background-color: #f5f5f5;
  font-family: 'Arial';
  font-size: 1.1rem;
  color: #000000;
}

.tab_nav.fixed {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 50;
  border-bottom: 1px solid #d3d3d3;
}

.tab_nav .tab_content {
  height: 100%;
}

.tab_nav .tab {
  height: 100%;
  width: auto;
  cursor: pointer;
  position: relative;
  color: #1a1a1a;
  margin-right: 3rem;
}

.tab_nav .tab.active {
  color: #ab0022;
}

.tab_nav .tab.active::after {
  content: "";
  width: 3.13rem;
  height: 0.19rem;
  background-color: #ab0022;
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
}

.intr {
  background-color: #fafafa;
  padding: 5rem 0;
}

.intr .img {
  height: 27.6rem;
  margin-right: 6rem;
  flex-shrink: 0;
}
.intr .img img{
  height: 100%;
}
.intr h4 {
  font-family: 'BodoniMTItalic';
  font-weight: normal;
  font-size: 3rem;
  margin-bottom: 4rem;
}

.intr .w_86 {
  align-items: flex-start;
}

.intr .right {
  padding-top: 4rem;
}

.intr .right p {
  font-family: 'Arial';
  font-size: 1rem;
  line-height: 1.5rem;
  color: #999999;
}

.cultural {
  padding: 6rem 0;
  background-color: #ffffff;
}

.tab_section h3 {
  font-family: 'BodoniMTItalic';
  font-size: 3rem;
  font-weight: normal;
  margin-bottom: 6.3rem;
}

.cultural .cultural_content {
  align-items: stretch;
  height: 36rem;
}

.cultural .left>div {
  margin-bottom: 4.1rem;
}

.cultural .left>div:last-child {
  margin-bottom: 0;
}

.cultural .left h4 {
  font-family: 'ArialMTBold';
  font-size: 1.2rem;
  font-weight: normal;
  padding-left: 1.44rem;
  height: 1.5rem;
  line-height: 1.5rem;
  margin-bottom: 1.2rem;
  position: relative;
}

.cultural .left h4::before {
  content: "";
  width: 0.5rem;
  height: 1.5rem;
  background-color: #ab0022;
  position: absolute;
  left: 0;
  top: 0;
  transform: skewX(-15deg);
}

.cultural .left p {
  font-family: 'Arial';
  font-size: .9rem;
  color: #999999;
  line-height: 1.6rem;
}

.cultural .ceo {
  width: 39.4rem;
  padding-top: 7.4rem;
  position: relative;
  padding-left: 2.5rem;
  top: -7.4rem;
}

.cultural .ceo .cultural-intr {
  margin-bottom: 7rem;
  position: relative;
  z-index: 2;
}

.cultural .ceo h4 {
  font-family: 'ArialMTBold';
  font-size: 1.5rem;
  height: 1.56rem;
  line-height: 1.56rem;
  margin-bottom: 1.3rem;
  color: #ab0022;
}

.cultural .ceo p {
  font-family: 'Arial';
  font-size: 0.8rem;
  color: #808080;
  line-height: 1.2rem;
  margin-bottom: 0.6rem;
}

.cultural .ceo p.p {
  color: #333333;
  margin-bottom: 3.6rem;
}

.cultural .ceo .img {
  width: 15.31rem;
  height: 21.19rem;
  position: absolute;
  top: 0;
  right: 0;
  z-index: 1;
}

.cultural .ceo .img img {
  width: 100%;
  overflow: hidden;
}

.cultural .ceo .img::after {
  content: "";
  width: 12.5rem;
  height: 16.25rem;
  background-color: #ededed;
  position: absolute;
  bottom: 0;
  left: 0;
  z-index: -1;
}

.cultural .ceo .speech h4 {
  color: #333333;
  margin-bottom: 1.4rem;
}

.cultural .ceo .sign {
  position: absolute;
  right: 0;
  bottom: -0.4rem;
}

.cultural .ceo .sign img {
  width: 11.63rem;
  height: 6.19rem;
}

.cultural .ceo .sign p {
  text-align: right;
  font-family: 'Arial';
  font-size: 0.8rem;
}

.milestone {
  width: 100%;
  height: auto;
  background: url(../img/aboutus/milestones.png) no-repeat;
  background-position: center;
  padding: 6rem 0;
}
.milestone .swiper{
  position: relative;
}
.milestone .swiper-container {
  position: relative;
  height: 30rem;
}
.milestone .swiper-container>div{
  position: relative;
  height: 30rem;
  align-items: flex-start;
z-index: 6;
}

.milestone .swiper-container::after {
  content: "";
  width: 100%;
  height: 1px;
  background-color: #000000;
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  z-index: 5;
}

.milestone .swiper-slide {
  width: 16.3rem;
  height: 22.5rem;
  background: rgba(255, 255, 255, .9);
  margin-right: 2.1rem;
  position: relative;
}

.milestone .swiper-slide .time {
  height: 7.5rem;
  font-family: 'avantibold';
  font-size: 2rem;
  text-align: center;
  padding-top: 1.2rem;
  background: #ab0022;
  color: #ffffff;
}

.milestone .swiper-slide .txt {
  height: calc(100% - 7.5rem);
  font-family: 'Arial';
  font-size: .9rem;
  line-height: 1.6rem;
  color: #666666;
  padding: 0 1rem;
}

.milestone .swiper-slide:nth-child(2n+1) {
  top: 7.5rem;
}

.milestone .swiper-slide:nth-child(2n+1) .time {
  padding-top: 4rem;
  background: none;
  color: #3d3d3d;
}

.milestone .swiper-slide:last-child {
  margin-right: 0;
}

.milestone .swiper-slide::after {
  content: "";
  width: 1.08rem;
  height: 1.08rem;
  background-color: #f5f5f5;
  border: solid 1px #333333;
  border-radius: 1.08rem;
  position: absolute;
  left: 50%;
  bottom: 6.9rem;
  transform: translateX(-50%);
  z-index: 6;
}

.milestone .swiper-slide:nth-child(2n+1)::after {
  bottom: auto;
  top: 6.9rem;
}

.milestone .button {
  height: 2.9rem;
  justify-content: flex-end;
}

.milestone .button>div {
  width: 2.9rem;
  height: 2.9rem;
  border: solid 1px #333333;
  margin-left: 1.4rem;
  cursor: pointer;
  transition: all .3s;
  position: initial;
  margin-top: 0;
}
.milestone .button>div.next{
  background: url(../img/aboutus/prevarrow2.png) no-repeat;
  background-position: center center;
}
.milestone .button>.btn.next:hover{
  background-image: url(../img/aboutus/prevarrow1.png);
  background-color: #ab0022;
  border: solid 1px #ab0022;
  transition: all .3s;
}
.milestone .button>div.prev{
  background: url(../img/aboutus/nextarrow2.png) no-repeat;
  background-position: center center;
}
.milestone .button>.btn.prev:hover{
  background-image: url(../img/aboutus/nextarrow1.png);
  background-color: #ab0022;
  border: solid 1px #ab0022;
  transition: all .3s;
}
.Building {
  width: 100%;
  padding: 6rem 0 0;
}
.Building_content h3{
  margin-bottom: 1.4rem;
}
.Building_content>p{
  font-family: 'Arial';
  font-size: 1.2rem;
  margin-bottom: 4rem;
  color: #666666;
} 
.Building_content ul{
  flex-wrap: wrap;
  align-items: flex-start;
}
.Building_content li{
  width: 33.33%;
  height: 18.6rem;
  padding: 0 10px;
  position: relative;
  margin-bottom: 1.5rem;
}
.Building_content li img{
  width: 100%;
}
.Building_content li>div{
  width: 100%;
  height: 100%;
  position: relative;
  overflow: hidden;
}
.Building_content li>div::after{
  content: "";
  width: 100%;
  height: 100%;
  background: rgba(0,0,0,.5);
  position: absolute;
  top: 0;
  left: 0;
  opacity: 0;
  transition: all .5s;
}
.Building_content li:hover div::after{
  opacity: 1;
  transition: all .5s;
}
.Building_content li .preview{
  width: 2.5rem;
	height: 2.5rem;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate3d(-50%,-50%,0);
  cursor: pointer;
  z-index: 2;
  opacity: 0;
  transition: all .5s;
}
.Building_content li:hover .preview{
  opacity: 1;
  transition: all .5s;
}
.picView{
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 100;
  background: rgba(0,0,0,.7);
  display: none;
}
.picView>.tools{
  width: 100%;
  height: 4rem;
  background: rgba(0,0,0,.5);
  position: absolute;
  top: 0;
  left: 0;
  z-index: 10;
  color: #ffffff;
  font-size: 1rem;
}
.picView .swiper-container{
  width: 100%;
  height: 100%;
  /* padding:4rem; */
}
.picView .swiper-slide img{
  max-height: 70%;
  max-width: 100%;
}
.picView .swiper-container .swiper-button-prev{
  left: 4rem;
  background: url(../img/resource/prev.png) no-repeat;
  background-size: 100%;
  background-position: center;
}
.picView .swiper-container .swiper-button-next{
  right: 4rem;
  background: url(../img/resource/next.png) no-repeat;
  background-size: 100%;
  background-position: center;
}
@media (max-width: 880px) {
  .w_86 {
    width: 100%;
    padding: 0 1.5rem;
  }

  .about_banner {
    height: 21rem;
  }

  .about_banner h3 {
    font-size: 1.7rem;
    left: 1.5rem;
    bottom: 2.5rem;
  }

  .tab_nav {
    font-size: 1.1rem;
    height: 5rem;
  }
  .intr{
    padding: 3rem 0;
  }
  .intr h4{
    font-size: 2.8rem;
    margin-bottom: 2rem;
  }
  .intr .img{
    display: none;
  }
  .intr .right{
    padding-top: 0;
  }
  .intr .right p{
    font-size: 1.2rem;
    line-height: 1.8rem;
  }
  .cultural {
    padding: 4rem 0;
  }

  .cultural h3 {
    font-size: 2.8rem;
    margin-bottom: 4rem;
  }

  .cultural .cultural_content {
    flex-wrap: wrap;
    align-items: flex-start;
    height: auto;
  }

  .cultural .cultural_content .left {
    width: 100%;
    display: flex;
    flex-wrap: wrap;
  }

  .cultural .left>div {
    width: 50%;
    padding-left: 1rem;
    margin-bottom: 3.5rem;
  }

  .cultural .left p {
    font-size: 1.2rem;
    line-height: 1.8rem;
  }

  .cultural .ceo {
    width: 100%;
    padding-left: 0;
    padding-top: 3.9rem;
    top: 0;
  }

  .cultural .ceo h4 {
    font-size: 1.8rem;
  }

  .cultural .ceo h4 span {
    font-size: 1rem;
  }

  .cultural .ceo .img {
    width: 17.6rem;
    height: auto;
    left: 19rem;
    right: auto;
  }
  .cultural .ceo .img::after{
    width: 82%;
    height: 80%;
  }
  .cultural .ceo p {
    font-size: 1rem;
    line-height: 1.36rem;
    margin-bottom: 0.6rem;
  }
  .cultural .ceo p.p{
    margin-bottom: 1.5rem;
  }
  .cultural .ceo .intr {
    margin-bottom: 2rem;
  }

  .cultural .ceo .sign {
    bottom: 3.1rem;
    right: auto;
    left: 20rem;
  }

  .cultural .ceo .sign p {
    font-size: 1rem;
  }
  .cultural .ceo .cultural-intr{
    margin-bottom: 2rem;
    width: 68%;
  }
  .milestone {
    padding: 4rem 0;
  }

  .milestone h3 {
    font-size: 2.8rem;
    margin-bottom: 4rem;
  }
  .milestone .swiper{
    padding-top: 4.1rem;
  }
  .milestone .swiper-slide{
    width: 17rem;
  }
  .milestone .swiper-slide .txt{
    font-size: 1.2rem;
  }
  .Building {
    padding: 4rem 0;
  }
  .Building_content h3{
    font-size: 2.8rem;
  }
  .Building_content>p{
    margin-bottom: 3rem;
  } 
  .Building_content ul{
    flex-wrap: wrap;
    align-items: flex-start;
  }
  .Building_content li{
    width: 50%;
    height:auto;
    padding: 0 0.5rem;
    position: relative;
    margin-bottom: 0.5rem !important;
  }
  .Building_content li img{
    width: 100%;
  }
  .Building_content li>div{
    width: 100%;
    height: 100%;
    position: relative;
    overflow: hidden;
  }
  .Building_content li>div::after{
    content: "";
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,.5);
    position: absolute;
    top: 0;
    left: 0;
    opacity: 0;
    transition: all .5s;
  }
  .Building_content li:hover div::after{
    opacity: 1;
    transition: all .5s;
  }
  .Building_content li .preview{
    width: 2.5rem;
    height: 2.5rem;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate3d(-50%,-50%,0);
    cursor: pointer;
    z-index: 2;
    opacity: 0;
    transition: all .5s;
  }
  .Building_content li:hover .preview{
    opacity: 1;
    transition: all .5s;
  }
  .picView>.tools{
    height: 5rem;
    font-size: 1.5rem
  }
}