.about{
  background: url(../images/bg.png) no-repeat center bottom;
  background-size: 100% auto;
  padding-top: 64px;
}
.about_nav ul{
  display: flex;
  align-items: center;
  justify-content: center;
}
.about_nav ul li{
  width: 149px;
  height: 59px;
  border-radius: 10px;
  line-height: 59px;
  text-align: center;
  font-weight: 600;
  font-size: 25px;
  cursor: pointer;
}
.about_nav ul li:not(:nth-last-child(1)){
  margin-right: 22px;
}
.about_nav ul li:hover{
  background: #53b933;
  color: #fff;
}
.about_nav ul li.active{
  background: #53b933;
  color: #fff;
}
.probably{
  margin-top: 127px;
  margin-bottom: 131px;
  display: flex;
  display: none;
}
.probably>div{
  flex: 1;
}
.probably div{
  font-size: 26px;
  line-height: 34px;
  color: #666666;
}
.probably_title{
  font-size: 28px;
}
.probably_title .line{
  width: 144px;
  height: 2px;
  margin-top: 34px;
  background: #46ba21;
}
.probably_l{
  padding-right: 87px;
}
.probably_r{
  padding-left: 90px;
}

.history{
  margin-top: 95px;
  margin-bottom: 118px;
  display: none;
}
.history_items{
  padding-left: 280px;
}
.history_item{
  display: flex;
}
.history_date{
  padding-top: 19px;
  padding-bottom: 58px;
  width: 171px;
  color: #53b933;
  font-size: 32px;
  border-right: 1px solid #dddddd;
  position: relative;
  margin-right: 81px;
}
.history_date .history_dian{
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: #53b037;
  position: absolute;
  right: -7px;
  top: 30px;
}
.history_text {
  flex: 1;
  padding-top: 19px;
}
.history_text p{
  font-size: 20px;
  line-height: 32px;
}

.range{
  margin-top: 127px;
  margin-bottom: 120px;
  display: none;
}
.range_detail{
  width: 963px;
  margin: auto;
}
.range_detail img{
  width: 100%;
}

.map{
  margin-top: 182px;
  margin-bottom: 120px;
}
.map_detail{
  width: 963px;
  margin: auto;
}
.map_detail img{
  width: 100%;
}

.box{
  display: none;
}
.box.active{
  display: block;
}
.probably.active{
  display: flex;
}

.honor{
  margin-top: 120px;
  margin-bottom: 120px;
}

@media screen and (max-width: 1420px){
  .about_nav{
    padding: 0 20px;
  }
  .probably.active{
    display: block;
  }
  .probably_l{
    padding-right: 0;
  }
  .probably_r{
    margin-top: 50px;
    padding-left: 0;
  }
  .history_items{
    padding-left: 20px;
  }
  .history_date{
    width: 130px;
  }
  .range_detail,.map_detail{
    width: 92%;
  }
}
@media screen and (max-width: 764px){
  .about{
    padding-top: 40px;
  }
  .about_nav{
    width: 92%;
    padding: 0;
    margin: 0 auto;
  }
  .about_nav ul li{
    font-size: 14px;
    width: 20%;
    height: 35px;
    line-height: 35px;
  }
  .about_nav ul li:not(:nth-last-child(1)){
    margin-right: 3px;
  }
  .probably{
    margin:  auto;
    margin-top: 40px;
    margin-bottom: 40px;
  }
  .probably img{
    width: 100%;
  }
  .probably_title .line{
    margin-top: 20px;
  }
  .history_date{
    font-size: 16px;
    width: 70px;
    min-width: 70px;
    margin-right: 40px;
    padding-bottom: 25px;
  }
  .history_text p{
       font-size: 14px !important;
    line-height: 1.5;
  }
}