.nav-top{
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  padding: 13px 0;
  z-index: 10;
  background-color: rgba(0, 0, 0, .85);
}
.nav-top .nt-menu-bar{
  float: right;
  display: none;
}
.nav-top .nt-logo{
  float: left;
  margin-left: 40px;
}
.nav-top .nt-logo img{
  height: 57px;
}
.nav-top .nt-nav{
  float: right;
  margin: 24px 15px 0 0;
}
.nav-top .nt-nav ul li{
  float: left;
  position: relative;
  margin: 0 35px;
}
.nav-top .nt-nav ul li a{
  font-size: 14px;
  color: #fff;
}
.nav-top .nt-nav ul li a:hover{
  color: #F3B91E;
}
.nav-top .nt-nav ul li.active:before{
  position: absolute;
  content: "";
  left: 0;
  bottom: -32px;
  width: 100%;
  border: 1px solid #f3b91e;
}
.nav-top .nt-nav ul li.active a{
  color: #f3b91e;
}
@media (max-width: 1010px) {
  .nav-top .nt-nav ul li{
    margin: 0 20px;
  }
}
@media (min-width: 750px) and (max-width: 820px) {
  .nav-top .nt-nav ul li{
    margin: 0 10px;
  }
}
@media (max-width: 750px) {
  .nav-top .nt-logo{
    margin-left: 6.25vmin;
  }
  .nav-top .nt-logo img{
    height: 7.5vmin;
  }
  .nav-top .nt-nav{
    display: none;
  }
  .nav-top .nt-menu-bar{
    display: block;
    position: absolute;
    right: 3.125vmin;
  }
  .nav-top .nt-menu-bar img{
    width: 5.25vmin;
  }
  .nav-top .nt-nav{
    display: none;
    float: initial;
    position: absolute;
    margin: 0;
    left: 0;
    right: 0;
    top: 100%;
    background-color: rgba(0, 0, 0, .85);
  }
  .nav-top .nt-nav ul li{
    float: initial;
    margin: 0;
    text-align: right;
    padding: 10px 20px;
  }
  .nav-top .nt-nav ul li.active:before{
    bottom: 0;
  }
}


.index-part p.tit{
  font-size: 28px;
  text-align: center;
}
.index-part p.desc{
  position: relative;
  margin-top: 6px;
  font-size: 16px;
  text-align: center;
}
.index-part p.desc:after{
  position: absolute;
  content: "";
  bottom: -8px;
  left: 50%;
  width: 26px;
  border-top: 1px solid #252525;
  transform: translateX(-50%);
}
@media (max-width: 640px) {
  .index-part p.tit{
    font-size: 20px;
  }
}


.development-history{
  padding: 60px 0 0 0;
  background: url(../images/bgs/bg-development-history.jpg) bottom center no-repeat;
}
.development-history p.tit{
  color: #252525;
}
.development-history p.desc{
  color: #DEA91A;
}
.development-history .histroy-tree{
  margin-top: 50px;
}
.development-history .histroy-tree ul{
  position: relative;
  width: 745px;
  padding-top: 10px;
  padding-bottom: 70px;
}
.development-history .histroy-tree ul:before{
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 0;
  border-left: 1px solid #F3B91E;
  content: "";
}
.development-history .histroy-tree ul li{
  display: flex;
  position: relative;
  margin-top: -14px;
}
.development-history .histroy-tree ul li:first-child{
  margin-top: 0;
}
.development-history .histroy-tree ul li:before{
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  width: 14px;
  height: 14px;
  border-radius: 50%;
  border: 4px solid #ffe6a1;
  background-color: #dea91a;
  content: "";
}
.development-history .histroy-tree ul li:nth-child(odd){
  justify-content: flex-end;
}
.development-history .histroy-tree ul li:nth-child(even){
  justify-content: flex-start;
}
.development-history .histroy-tree ul li .content{
  padding: 18px 24px;
  width: 342px;
  background-color: rgba(46, 46, 46, .05);
  font-size: 14px;
  color: #2e2e2e;
  line-height: 24px;
}
@media (max-width: 750px) {
  .development-history{
    padding-left: 10px;
    padding-right: 10px;
  }
  .development-history .histroy-tree ul li .content{
    padding: 2.8125vmin 3.75vmin;
    width: 45%;
    line-height: 16px;
  }
}


.nav-bot{
  padding: 40px 0 23px 0;
  background-color: #252525;
}
.nav-bot .container{
  align-items: center;
}
.nav-bot .nb-logo img{
  width: 108px;
  height: 141px;
}
.nav-bot .nb-search{
  width: 298px;
}
.nav-bot .nb-search p.tit{
  display: inline-block;
  padding: 17px 0;
  border-bottom: 5px solid #dea91a;
  font-size: 24px;
  color: #dea91a;
  font-weight: 600;
}
.nav-bot .nb-search .box{
  margin-top: 22px;
  display: flex;
}
.nav-bot .nb-search .box input{
  flex: 1;
  border: none;
  outline: none;
  padding: 0 12px;
  font-size: 16px;
}
.nav-bot .nb-search .box button{
  margin: 0;
  padding: 0;
  width: 37px;
  line-height: 37px;
  font-size: 16px;
  color: #fff;
  text-align: center;
  background-color: #dea91a;
  border: none;
}
.nav-bot .nb-infos{
  max-width: 380px;
}
.nav-bot .nb-infos p{
  position: relative;
  padding-left: 26px;
  margin-top: 24px;
  font-size: 12px;
  color: #919191;
}
.nav-bot .nb-infos p img{
  left: 8px;
  transform: translate(-50%, -50%);
}
.nav-bot .nb-infos p:first-child{
  margin-top: 0;
}
.nav-bot .nb-qrcode{}
.nav-bot .nb-qrcode .box{
  width: 122px;
  height: 122px;
  overflow: hidden;
}
.nav-bot .nb-qrcode .box img{
  width: 100%;
  height: 100%;
}
.nav-bot .nb-qrcode p{
  margin-top: 12px;
  font-size: 12px;
  color: #919191;
  text-align: center;
}
.copyright{
  border-top: 2px solid #252525;
  height: 50px;
  background-color: #1d1d1d;
}
.copyright p{
  font-size: 12px;
  color: #7d7d7d;
  line-height: 20px;
}
@media (max-width: 1200px) {
  .nav-bot{
    padding-left: 10px;
    padding-right: 10px;
  }
}
@media (min-width: 750px) and (max-width: 1200px) {
  .nav-bot .nb-search{
    width: auto;
  }
}
@media (max-width: 750px) {
  .nav-bot .container{
    flex-wrap: wrap;
    justify-content: space-around;
  }
  .nav-bot .nb-logo{
    display: none;
  }
  .nav-bot .nb-search{
    width: 90%;
  }
  .nav-bot .nb-infos{
    margin-top: 40px;
    width: 90%;
    max-width: 90%;
  }
  .nav-bot .nb-qrcode{
    display: none;
  }
}


.common-top{
  position: relative;
}
.common-top img.bg{
  width: 100%;
}
.common-top .box{
  position: absolute;
  z-index: 1;
  top: 10%;
  bottom: 0;
  left: 0;
  right: 0;
  text-align: center;
}
.common-top .box .en{
  font-size: 14px;
  color: #858585;
  text-align: center;
}
.common-top .box .ch{
  position: relative;
  display: inline-block;
  margin-top: 12px;
  font-size: 30px;
  color: #dea91a;
  font-weight: 600;
}
.common-top .box .ch:before,
.common-top .box .ch:after{
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 50px;
  content: "";
  border-top: 1px solid #dea91a;
}
.common-top .box .ch:before{
  left: 115%;
}
.common-top .box .ch:after{
  right: 115%;
}
.common-top .banner-phone{
  display: none;
}
@media (max-width: 1200px) {
  .common-top{
    min-height: 440px;
  }
  .common-top .bg{
    display: none;
  }
}
@media (max-width: 640px) {
  .common-top{
    min-height: 54.6875vmin;
  }
  .common-top .banner-phone{
    display: block;
    position: absolute;
    top: 0;
    left: 0;
    bottom: 0;
    right: 0;
    z-index: 0;
  }
  .common-top .banner-phone img{
    width: 100%;
  }
}
@media (max-width: 374px) {
  .common-top .box .ch{
    margin-top: 6px;
    font-size: 24px;
  }
  .common-top .box .ch:before,
  .common-top .box .ch:after{
    width: 40px;
  }
}


.common-content{
  padding-bottom: 100px;
}
@media (max-width: 640px) {
  .common-content{
    padding-bottom: 15.625vmin;
  }
}


.page-info{
  margin-top: 64px;
}
.page-info .box{
  display: flex;
}
.page-info .box a{
  margin: 0 2px;
  padding: 0 8px;
  min-width: 32px;
  font-size: 12px;
  text-align: center;
  color: #666;
  line-height: 30px;
}
.page-info .box a.active,
.page-info .box a.page-num-current{
  color: #fff;
  background-color: #dea91a;
}
.page-info .box span.page-num{
  line-height: 30px;
}

@media (max-width: 560px) {
  .page-info{
    margin-top: 6.6875vmin;
  }
  .page-info .box{
    flex-wrap: wrap;
  }
  .page-info .box a{
    padding: 0 1.25vmin;
    min-width: 5vmin;
    font-size: 1.875vmin;
    line-height: 4.6875vmin;
  }
}