.banner {
    width: 100%;
}

.banner img {
    display: block;
    width: 100%;
    object-fit: cover;
    min-height: 21.875rem;

}

.about_list {
    background: #ffff;
    width: 100%;
    padding: .75rem 0 0;
    border-bottom: 1px solid #E5E5E5;
}

.about_list .center {
    display: flex;
    align-items: center;
    justify-content: center;
    overflow-x: auto;
}

.about_list .center a {
    display: block;
    white-space: nowrap;
    padding-bottom: .75rem;
    position: relative;
    font-family: Microsoft YaHei, Microsoft YaHei;
    font-weight: 400;
    font-size: 1rem;
    color: #333333;
    line-height: 1.25rem;
    text-align: center;
    font-style: normal;
    text-transform: none;
    transition: all 0.2s ease-in-out;
    margin: 0 1.125rem;
}

.about_list .center a:hover {
    color: #0154A4;
}

.about_list .center a::after {
    content: '';
    display: block;
    position: absolute;
    left: 50%;
    bottom: 0;
    width: 0%;
    height: 1px;
    background: #0154A4;
    transition: all 0.3s ease-in-out;
}

.about_list .center a:hover::after {
    left: 0;
    width: 100%;
}

.about_list .center a.act {
    color: #0154A4;
}

.about_list .center a.act::after {
    left: 0;
    width: 100%;
}


.history{
    overflow: hidden;
    background: url(../images/history_10.png) no-repeat center bottom;
    background-size: cover;
    padding: 10rem 0;
}
.history .swiper{
    overflow: visible;
    position: relative;
}
.history .swiper:after{
    content: '';
    width: calc(100% + 200px);
    height: 4px;
    background: #0154A4;
    position: absolute;
    left: -100px;
    top: calc(50% - 2px);
}
.history .swiper .swiper-slide{
    position: relative;
    display: flex;
    flex-direction: column;
    height: 33rem;
}
.history .swiper .swiper-slide .empty{
    height: 16.5rem;
}
.history .swiper .swiper-slide dl{
    width: 200%;
    height: 16.5rem;
    display: flex;
}
.history .swiper .swiper-slide dl dt{
    position: relative;
}
.history .swiper .swiper-slide dl dt:after{
    content: '';
    width: 2px;
    height: 100%;
    background: #0154A4;
    position: absolute;
    z-index: -1;
    left: calc(50% - 1px);
    top: 0;
}
.history .swiper .swiper-slide dl dt:before{
    content: '';
    width: 1rem;
    height: 1rem;
    background: #ffffff;
    border: .25rem solid #0154A4;
    border-radius: 50%;
    position: absolute;
    left:50%;
    bottom: 0;
    transform: translate(-50%,50%);
}
.history .swiper .swiper-slide dl dt div{
    width: 5.25rem;
    height: 5.25rem;
    background: #0154A4;
    border: 2px solid #0154A4;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
}
.history .swiper .swiper-slide dl dt div img{
    width: 3.125rem;
    height: 3.125rem;
}
.history .swiper .swiper-slide dl dd{
    padding-left: 1.25rem;
}
.history .swiper .swiper-slide dl dd h3{
    font-size: 1.875rem;
    line-height: 5.25rem;
}
.history .swiper .swiper-slide dl dd h3 span{
    font-size: 2.5rem;
    margin-right: .625rem;
}
.history .swiper .swiper-slide dl dd p{
    font-size: 1rem;
    line-height: 1.875rem;
}
.history .swiper .swiper-slide:nth-child(2n){
    flex-direction: column-reverse;
}
.history .swiper .swiper-slide:nth-child(2n) dl dt{
    display: flex;
    align-items: flex-end;
}
.history .swiper .swiper-slide:nth-child(2n) dl dt:before{
    bottom: auto;
    top: 0;
    transform: translate(-50%,-50%);
}
.history .swiper .swiper-slide:nth-child(2n) dl dd{
    padding-top: 11.25rem;
}
.history .swiper .swiper-button-prev{
    width: 3.25rem;
    height: 3.25rem;
    background: #ffffff;
    border: 2px solid #0154A4;
    border-radius: 50%;
    left: -6.25rem;
    transform: translateY(-50%);
    margin-top: 0;
}
.history .swiper .swiper-button-prev:after{
    content: '';
}
.history .swiper .swiper-button-prev span{
    color: #0154A4;
    font-size: 1.875rem;
}
.history .swiper .swiper-button-next{
    width: 3.25rem;
    height: 3.25rem;
    background: #ffffff;
    border: 2px solid #0154A4;
    border-radius: 50%;
    right: -6.25rem;
    transform: translateY(-50%);
    margin-top: 0;
}
.history .swiper .swiper-button-next:after{
    content: '';
}
.history .swiper .swiper-button-next span{
    color: #0154A4;
    font-size: 1.875rem;
}
.history .swiper .swiper-button-prev:hover{
    background: #0154A4;
}
.history .swiper .swiper-button-prev:hover span{
    color: #ffffff;
}
.history .swiper .swiper-button-next:hover{
    background: #0154A4;
}
.history .swiper .swiper-button-next:hover span{
    color: #ffffff;
}
.history .swiper .swiper-button-next.swiper-button-disabled,.history .swiper .swiper-button-prev.swiper-button-disabled{
    opacity: 0.85;
}


@media (max-width: 1200px) {
    .banner{
        margin-top: 5rem;
    }
}


@media (max-width: 768px) {
    .banner{
        margin-top: 0;
    }
    .banner img{
        min-height: auto;
    }

    .about_list .center{
        justify-content: flex-start;
    }

    .history{
        padding: 1.875rem 0 4.875rem 0;
    }
    
    .history .swiper .swiper-slide{
        height:20rem;
    }

    .history .swiper .swiper-slide dl{
        width: 150%;
    }
    .history .swiper .swiper-slide dl dt div{
        width: 3.75rem;
        height: 3.75rem;
    }
    .history .swiper .swiper-slide dl dt div img{
        width: 60%;
        height: 60%;
    }
    .history .swiper .swiper-slide dl dd h3{
        font-size: 1.25rem;
        line-height: 1.875rem;
    }
    .history .swiper .swiper-slide dl dd p{
        font-size: .75rem;
        line-height: 1.5;
    }
     .history .swiper .swiper-slide:nth-child(2n) dl{
        height: 16.5rem;
    }
    .history .swiper .swiper-slide:nth-child(2n) dl dd{
        height: 4.25rem;
        padding-top: 7.25rem;
    }
    
}