.banner img{
    display: block;
    width: 100%;
}
.wap-banner{
    display: none;
}
.nav{
    width: 100%;
    padding: 28px 0;
    background-color: #f1f4f8;
}
.nav-box{
    width: 1155px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.nav-item{
    width: 22%;
    height: 95px;
    background-color: #fff;
    border-radius: 5px;
    display: flex;
    align-items: center;
    padding: 0 20px;
    box-sizing: border-box;
    cursor: pointer;
}
.nav-item-icon{
    width: 51px;
    height: 48px;
    margin-right: 23px;
}
.nav-item:nth-child(1) .nav-item-icon{
    background: url("../img2/nav-bg1.png") no-repeat center;
}
.nav-item:nth-child(1):hover .nav-item-icon{
    background: url("../img2/nav-bg1-hover.png") no-repeat center;
}
.nav-item:nth-child(2) .nav-item-icon{
    background: url("../img2/nav-bg2.png") no-repeat center;
}
.nav-item:nth-child(2):hover .nav-item-icon{
    background: url("../img2/nav-bg2-hover.png") no-repeat center;
}
.nav-item:nth-child(3) .nav-item-icon{
    background: url("../img2/nav-bg3.png") no-repeat center;
}
.nav-item:nth-child(3):hover .nav-item-icon{
    background: url("../img2/nav-bg3-hover.png") no-repeat center;
}
.nav-item:nth-child(4) .nav-item-icon{
    background: url("../img2/nav-bg4.png") no-repeat center;
}
.nav-item:nth-child(4):hover .nav-item-icon{
    background: url("../img2/nav-bg4-hover.png") no-repeat center;
}
.nav-item-inner h3{
    font-size: 16px;
    color: #4f5266;
    margin-bottom: 15px;
}
.nav-item-inner p{
    font-size: 14px;
    color: #767888;
}
.main-wrapper{
    width: 1155px;
    margin: 0 auto;
}
.part-one{
    padding: 74px 0;
    box-sizing: border-box;
    text-align: center;
}
.main-title{
    padding: 0 43px;
    font-size: 30px;
    color: #3c3f4f;
    display: inline;
    background: url(../img2/title-left.png)center left no-repeat,url(../img2/title-right.png)right center no-repeat;
}
.sub-title{
    font-size: 18px;
    color: #767888;
    margin-top: 28px;
}
.part-one-box{
    display: flex;
    justify-content: space-between;
    margin-top: 56px;
}
.part-one-box-left{
    width: 679px;
    flex-shrink: 0;
}
.part-one-box-right li{
    height: 93px;
    padding-left: 83px;
    text-align: left;
    display: flex;
    flex-direction: column;
    justify-content: space-evenly;
}
.part-one-box-right li:nth-child(1){
    width: 314px;
    background: url('../img2/part-one-bg1.png') no-repeat;
}
.part-one-box-right li:nth-child(2){
    width: 431px;
    background: url('../img2/part-one-bg2.png') no-repeat;
}
.part-one-box-right li:nth-child(3){
    width: 548px;
    background: url('../img2/part-one-bg3.png') no-repeat;
}
.part-one-box-right li:nth-child(4){
    width: 652px;
    background: url('../img2/part-one-bg4.png') no-repeat;
}
.part-one-box-right li h3{
    font-size: 18px;
    color: #3c3f4f;
}
.part-one-box-right li p{
    font-size: 14px;
    color: #515360;
}

.part-two{
    width: 100%;
    height: 680px;
    background: url("../img2/part-two-bg.png") no-repeat;
    text-align: center;
    padding: 40px 0;
}
.part-two-wrapper{
    display: flex;
    justify-content: space-between;
    margin-top: 54px;
}
.part-two-wrapper-item{
    width: 274px;
    height: 441px;
    background-color: #fff;
    border-radius: 10px;
    padding: 37px 27px;
    box-sizing: border-box;
}
.part-two-wrapper-item-title{
    font-size: 20px;
    color: #3c3f4f;
    margin-top: 10px;
}
.dashes-line{
    display: block;
    width: 151px;
    height: 20px;
    border-bottom: 1px dashed #a2aab9;
    margin: 0 auto;
}
.part-two-wrapper-item-txt{
    font-size: 14px;
    color: #767888;
    line-height: 30px;
    margin-top: 20px;
    text-align: left;
}
.part-three{
    width: 100%;
    height: 840px;
    text-align: center;
    padding: 60px 0;
    box-sizing: border-box;
    background: url("../img2/part-three-bg.png") no-repeat;
    overflow: hidden;
}
.part-three-wrapper{
    display: flex;
    justify-content: space-between;
    margin-top: 78px;
    overflow: hidden;   
}
.part-three-wrapper-left{
    width: 309px;
    flex-shrink: 0;
}
.part-three-wrapper-right{
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
}
.part-three-wrapper-right-item{
    width: 202px;
    height: 223px;
    text-align: center;
    margin-bottom: 57px;
    padding: 0 10px;
}
.part-three-wrapper-right-item-icon{
    width: 114px;
    height: 114px;
    display: inline-block;
}
.part-three-wrapper-right-item-title{
    font-size: 16px;
    color: #3c3f4f;
}
.part-three-wrapper-right-item-txt{
    font-size: 14px;
    color: #767888;
    line-height: 30px;
    margin-top: 10px;
    text-align: left;
}
.part-four{
    width: 100%;
    height: 738px;
    padding: 49px 0;
    box-sizing: border-box;
    text-align: center;
    background: url("../img2/part-four-bg.png") no-repeat;
    overflow: hidden;
}
.part-four-wrapper{
    width: 1174px;
    position: relative;
    height: 538px;
    margin-top: 60px;
    background: url("../img2/part-four-img1.png") no-repeat center;
    background-size: 50%;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
}
.part-four-wrapper-item{
    width: 50%;
}
.part-four-wrapper-item:nth-child(odd){
    text-align: left;
}
.part-four-wrapper-item:nth-child(odd) h3{
    width: 182px;
    height: 52px;
    background: url("../img2/part-four-left-bg.png") no-repeat;
    text-align: center;
    line-height: 42px;
    color: #fff;
    font-size: 20px;
    font-weight: 400;
}
.part-four-wrapper-item:nth-child(even){
    text-align: right;
}
.part-four-wrapper-item:nth-child(even) h3{
    width: 182px;
    height: 52px;
    background: url("../img2/part-four-right-bg.png") no-repeat;
    text-align: center;
    line-height: 42px;
    color: #fff;
    font-size: 20px;
    font-weight: 400;
    display: inline-block;
}
.part-four-wrapper-item p{
    font-size: 14px;
    color: #ffffff;
    margin-top: 15px;
}
.part-four-wrapper-item p span{
    width: 328px;
    display: inline-block;
}
.part-five{
    width: 100%;
    height: 792px;
    padding: 49px 0;
    box-sizing: border-box;
    text-align: center;
    background: url("../img2/part-five-bg.png") no-repeat;
    overflow: hidden;
}
.part-five-wrapper{
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.part-five-wrapper-left{
    width: 481px;
}
.part-five-wrapper-left-line{
    width: 27px;
    height: 5px;
    background-color: #1c64ff;
    border-radius: 10px;
    display: block;
}
.part-five-wrapper-left-txt{
    font-size: 16px;
    color: #3c3f4f;
    line-height: 28px;
    text-align: left;
    margin-top: 10px;
}
.part-five-wrapper-left-ul{
    margin-top: 55px;
}
.part-five-wrapper-left-ul li{
    display: flex;
    text-align: left;
    align-items: flex-start;
}
.part-five-wrapper-left-img{
    width: 28px;
    flex-shrink: 0;
    margin-right: 20px;
}
.part-five-wrapper-left-p{
    font-size: 14px;
    color: #767888;
    line-height: 28px;
    position: relative;
    top: -7px;
}

@media screen and (min-width:1400px) and (max-width:1533px){
    
    .part-one-box-left{
        margin: 0 auto;
        width: 48%;
    }
    .part-one-box-right{
        width: 48%;
        margin: 0 auto;
    }
    .part-one-box{
        display: flex;
        justify-content: space-between;
        margin-top: 56px;
        align-items: flex-end;
    }
}
@media screen and (min-width:1230px) and (max-width:1399px){
    
   .part-one-box-left{
        margin: 0 auto;
        width: 48%;
    }
    .part-one-box-right{
        width: 48%;
        margin: 0 auto;
    }
    .part-one-box{
        display: flex;
        justify-content: space-between;
        margin-top: 56px;
        align-items: flex-end;
    }

}
@media screen and (min-width:1014px) and (max-width:1229px){
    .main-wrapper{
        width: 90%;
    }
    .part-one-box{
        display: block;
    }
    .part-one-box-left{
        margin: 0 auto;
        width: 70%;
    }
    .part-two-wrapper{
        flex-wrap: wrap;
    }
    .part-two-wrapper-item{
        width: 24%;
    }
    .part-three-wrapper-right-item{
        width: 145px;
    }
    .part-four-wrapper{
        width: 100%;
    }
    .nav-box{
        width: 97%;
    }
    .part-five{
        height: auto;
    }
    .part-five-wrapper{
        display: block;
    }
    .part-five-wrapper-left{
        width: 100%;
    }
}
@media screen and (min-width:375px) and (max-width:768px){
    .nav-box{
        width: 98%;
        flex-wrap: wrap;
    }
    .nav-item{
        width: 48%;
        margin-bottom: 10px;
    }
    .main-wrapper{
        width: 98%;
    }
    .main-title{
        font-size: 17px;
    }
    .sub-title{
        font-size: 14px;
        line-height: 30px;
    }
    .part-one{
        padding: 40px 0;
    }
    .part-one-box{
        display: block;
    }
    .part-one-box-left{
        width: 98%;
        display: block;
    }
    .part-one-box-right li{
        margin: 0 auto;
    }
    .part-one-box-right li:nth-child(1){
        width: 98%;
        background: url("../img2/9(2).png") no-repeat;
        background-size: 100%;
    }
    .part-one-box-right li:nth-child(2) {
        width: 98%;
        background: url("../img2/10(2).png") no-repeat;
        background-size: 100%;
    }
    .part-one-box-right li:nth-child(3) {
        width: 98%;
        background: url("../img2/11(2).png") no-repeat;
        background-size: 100%;
    }
    .part-one-box-right li:nth-child(4) {
        width: 98%;
        background: url("../img2/12(2).png") no-repeat;
        background-size: 100%;
    }
    .part-one-box-right li h3{
        font-size: 14px;
    }
    .part-one-box-right li p{
        font-size: 12px;
    }
    .part-one-box-right li{
        height: 60px;
    }
    .part-two{
        width: 100%;
        height: auto;
        background-repeat: repeat;
        overflow: hidden;
    }
    .part-two-wrapper{
        flex-wrap: wrap;
        margin-top: 30px;
    }
    .part-two-wrapper-item{
        width: 98%;
        margin: 0 auto 15px ;
    }
    .part-three-wrapper-left{
        display: none;
    }
    .part-three-wrapper-right-item{
        width: 48%;
    }
    .part-three{
        background: none;
        height: auto;
        overflow: hidden;
    }
    .part-three-wrapper{
        margin-top: 30px;
    }
    .part-four-wrapper{
        width: 98%;
        background-size: 85%;
        background-position: top;
        align-content: baseline;
        padding-top: 250px;
        justify-content: space-between;
        align-items: normal;
        margin-top: 30px;
    }
    .part-four-wrapper-item{
        width: 48%;
        margin-bottom: 25px;
    }
    .part-four-wrapper-item:nth-child(even){
        text-align: left;
    }
    .part-four-wrapper-item:nth-child(even) h3{
        font-size: 18px;
    }
    .part-four-wrapper-item:nth-child(odd) h3{
        font-size: 18px;
    }
    .part-four-wrapper-item p{
        line-height: 30px;
    }
    .part-four-wrapper-item p span{
        width: 100%;
    }
    .banner{
        display: none;
    }
    .wap-banner{
        display: block;
    }
    .nav-item-inner h3{
        font-size: 14px;
    }
    .nav-item-inner p{
        font-size: 12px;
    }
    .nav{
        padding: 18px 0;
    }
    .part-five{
        height: auto;
    }
    .part-five-wrapper{
        display: block;
    }
    .part-five-wrapper-left{
        width: 100%;
    }
}