.nav{
    border-bottom: none !important;
}


.main .banner_box {
    height: auto;
     margin-top: 20px;
}



.banner_box img {
    width: 100%;
    height: auto;
}

.bankuai {
    margin-top: 50px;
}

.csxztitlebox {
    background: url(/Sites/Uploaded/UserUpLoad/20191112/20191112173812.png) no-repeat left center , url(/Sites/Uploaded/UserUpLoad/20191112/20191112173834.png) no-repeat right center;
    margin-bottom: 20px;
}

a.titcs {
    font-size: 30px;
    font-family: DFPLiJinHeiW8-GB;
    font-weight: bold;
    font-style: italic;
    margin-left: 30px;
}

span.colblue {
    color: rgba(10,85,157,1);
}

.mainpic li {
    float: left;
}
.mainpic li:nth-child(1) {
    margin-right: 20px;
}
.mainpic a.img_box {
    display: block;
    width: 590px;
    height: 391px;
}

.mainpic a.img_box img {
    width: 100%;
    height: auto;
}

.mianart p {
    font-size: 16px;
    font-family: Source Han Sans CN;
    font-weight: 300;
    color: rgba(51,51,51,1);
    line-height: 35px;
    text-indent: 2em;
}
.mainpic {
    overflow: hidden;
    margin-bottom: 20px;
}

.videobox li {
    float: left;
    margin-right: 9px;
}

.videobox a.title_type {
    display: block;
    text-align: center;
    font-size: 16px;
    font-family: Source Han Sans CN;
    font-weight: 300;
    color: rgba(51,51,51,1);
    line-height: 35px;
}
.videobox .img_box{
    display: block;
    width: 100%;
    height: auto;
    position: relative;
}

.videobox .img_box::after{
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    display: block;
    width: 100%;
    height: 100%;
    background: url(/Sites/Uploaded/UserUpLoad/20191113/20191113111954.png) no-repeat center center;
} 

.videobox li:last-child {
    margin-right: 0;
}
a.downa {
    display: block;
    width: 221px;
    height: 55px;
    margin: 0 auto;
    text-align: center;
    line-height: 55px;
    background: url(/Sites/Uploaded/UserUpLoad/20191113/20191113115309.png) no-repeat center;
    background-size: cover;
    color: #fff;
    font-size: 18px;
    letter-spacing: 2px;
    box-sizing: border-box;
    text-indent: 0;
}


.leftNavTitle{
    display: none;
}
.main .banner_box img {
    position: initial;
}
.swiper-container {
    width: 100%;
    height: 100%;
    
}
.swiper-slide .img_box img{
    width: 293px;
    height: 200px;
}
div.swiper-container .swiper-slide{
    width: 293px;
}
@media screen and (max-width: 768px){
    .mainpic li:nth-child(1) {
        margin-right: 0;
    }
    .mainpic li{
        float: none;
        margin-bottom: 10px;
    }
    .mainpic a.img_box {
        display: block;
        width: 100%;
        height: auto;
    }
    .videobox ul {
        display: flex;
        flex-wrap: wrap;
        justify-content: space-evenly;
    }
    .videobox ul li {
        float: none;
        margin-right: 0;
    }
    .csxztitlebox {
        background: url(/Sites/Uploaded/UserUpLoad/20191112/20191112173812.png) no-repeat left center , url(/Sites/Uploaded/UserUpLoad/20191112/20191112173834.png) no-repeat 36vw center;
        margin-bottom: 20px;
        background-size: auto , auto;
    }
}