.join_Nav_ul li:nth-child(1) {
    border-bottom: .1rem solid #0072CE;
}

.join_Nav_ul li:nth-child(1) a {
    color: #0072CE;
}

.strategy {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100%;
    height: 39rem;
}


.strategy_img {
    position: relative;
    width: 72rem;
    height: 24rem;
    margin: auto;
    background-image: url(../image/joinDevelop/bg_1.png);
    background-size: cover;
}
.strategy_font{
    position: absolute;
    top: 8rem;
    left: 5rem;
}
.strategy_font h3{
    font-size: 1.6rem;
    font-family: Source Han Sans CN;
    font-weight: 400;
    color: #FFFFFF;
    line-height: 1.4rem;
}
.strategy_font p{
    width: 13.8rem;
    font-size: 0.9rem;
    font-family: Source Han Sans CN;
    font-weight: 400;
    margin-top: 2rem ;
    color: #FFFFFF;
    line-height: 1.6rem;
}

.develop {
    display: flex;
    flex-direction: column;
    align-items: center;
    height: 46.5rem;
    background-color: #F2F4F9;
}

.develop_title,
.environment_title {
    font-size: 1.6rem;
    font-family: Source Han Sans CN;
    font-weight: 400;
    color: #333333;
    text-align: center;
    padding-top: 5.05rem;
}

.develop_title_p {
    font-size: .8rem;
    font-family: Source Han Sans CN;
    font-weight: 400;
    color: #888888;
    margin-top: 1.05rem;
}
.swiper_box{
    width: auto;
    height: auto;
}

#swiper-one {
    width: 72rem;
    height: 32.1rem;
    margin: 3rem auto;
}

#swiper-one .swiper-slide {
    display: -webkit-box;
    display: -ms-flexbox;
    display: -webkit-flex;
    display: flex;
    -webkit-box-pack: center;
    -ms-flex-pack: center;
    -webkit-justify-content: center;
    justify-content: center;
    -webkit-box-align: center;
    -ms-flex-align: center;
    -webkit-align-items: center;
    align-items: center;
}

#swiper-one .swiper-slide:hover {
    box-shadow: 0 0 1.2rem 0 rgba(173, 173, 173, 0.1);
    transform: scale(1.1)
}

.develop_box {
    width: 100%;
    height: 26.1rem;
    margin-right: 1.5rem;
    background: #FFFFFF;
    box-shadow: 0 0 .24rem 0 rgba(173, 173, 173, 0.1);
    border-radius: .4rem;
    overflow: hidden;
}

.develop_box:last-child {
    margin-right: 0;
}

.develop_img img {
    width: 100%;
    height: 14.75rem;
    background-size: cover;
}

.develop_font {
    height: 11.35rem;
    margin: 2.35rem 2rem 0 2rem;
}

.develop_font p {
    font-size: 1.2rem;
    font-family: Source Han Sans CN;
    font-weight: 400;
    color: #333333;
    line-height: 1.4rem;
    
     overflow:hidden;
  text-overflow: ellipsis;
  -webkit-line-clamp: 3;
  display: -webkit-box;
  -webkit-box-orient: vertical;
}

.develop_font p:nth-child(2) {
    margin-top: .95rem;
    font-size: .8rem;
    color: #888888;
}

.environment {
    position: relative;
    height: 45.05rem;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.environment_bottom {
    position: relative;
    width: 82rem;
    margin-top: 3.05rem;
    display: flex;
    flex-direction: column;
    align-items: center;
}

#swiper-two {
    width: 72rem;
    height: auto;
}

#swiper-two .swiper-slide {
    width: 48.2rem;
    display: flex;
    align-items: center;
}

#swiper-two .swiper-slide img {
    width: 100%;
}

.environment_bottom .swiper-button-white {
    /* position: absolute; */
    width: 2rem;
    height: 2rem;
    color: #999999;
    background: #E5E5E5;
    border-radius: 50%;
    /* font-size: 0; */
}

.icon-youjiantou,
.icon-zuojiantou {
    font-size: .8rem !important;
}

.swiper-button-white:hover {
    color: #FFFFFF;
    background: #0072CE;
}

.environment_bottom .swiper-button-white::after {
    font-size: 0;
}

#swiper-two .swiper-slide img {
    opacity: 0.2;
    border-radius: 0.8rem;
}

#swiper-two .swiper-slide-active img {
    opacity: 1;
    border-radius: 0.8rem;
}


@media (max-width: 900px) {
    .strategy_img{
        width: 95% !important;
        height: 30rem;
    }
    .develop_title, .environment_title{
        font-size: 2.6rem !important;
    }
    .develop {
        height: auto;
        padding-bottom: 5rem;
    }
    #swiper-one {
        width: 95%;
        height: auto;
        margin: 2rem auto;
    }
    #swiper-one .swiper-slide{
        height: auto;
    }
    .develop_box{
        height: auto;
    }
    .develop_img img {
        width: 100%;
        height: auto;
    }
    .develop_font {
        height: auto;
        margin-top: 1rem;
    }
    .develop_font p {
        line-height: 2.4rem;
    }
    .environment{
        height: auto;
        margin-bottom: 5rem;
    }
    .environment_bottom{
        width: 95%;
    }
    #swiper-two{
        width: 90%;
    }
    .environment_bottom .swiper-button-white{
        display: none;
    }
}

@media screen and (max-width: 768px) {
  .develop_title_p {
        width: 95%;
        margin: 1.05rem auto 0;
    }
     .story_buttom .swiper-button-white{
        width: 3rem;
        height: 3rem;
    }
    .develop_font p {
        line-height: 3rem;
    }
    .strategy_font h3{
        font-size: 1.6rem;
        line-height: 1.4rem;
    }
    .strategy_font p{
        line-height: 2rem;
    }
    
}


@media (max-width:650px){
    .strategy_font h3{
         font-size: 16px !important;
        /*line-height: 1.4rem;*/
    }
    .strategy_font p{
        width: 40%;
        margin-top: 3.5rem;
        font-size: 10px;
        
        line-height: 4rem;
    }
    
    .develop_title, .environment_title{
        font-size: 20px !important;
    }
  
    .develop_font p{
         line-height: 4rem !important;
    }
    .develop_title_p,#swiper-one{
        width: 90% !important;
    }
    .environment{
        margin-bottom: 20px;
    }
    .environment_bottom .swiper-button-white{
        width: 18px;
        height: 18px;
    }
    
     .develop_font p,
     .develop_title_p{
        font-size: 14px !important;
        line-height: 20px !important;
    }
}

@media screen and (max-width: 500px) {
.story_buttom .swiper-button-white{
        width: 4rem;
        height: 4rem;
    }
    .develop_font p {
        line-height: 3.5rem;
    }
}