.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;
 }
}