.nav {
    width: 100%;
    height: 1.2rem;
    background: #FFFFFF;
}

.nav_box {
    width: 14.8rem;
    height: 100%;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: center;
}

.nav_box a {
    width: auto;
    height: .4rem;
    border: 0.01rem solid #FFFFFF;
    font-family: MiSans, MiSans;
    font-weight: 400;
    font-size: 0.16rem;
    color: #3B3B3B;
    margin: 0 .12rem;
    padding: 0 .2rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.nav_active {
    border: 0.01rem solid #707070 !important;
}

.banner2 {
    width: 100%;
    height: 3.8rem;
    background-position: center center;
    background-repeat: no-repeat;
    background-size: cover;
    position: relative;
}

.banner2::after {
    content: '';
    width: 100%;
    height: 100%;
    position: absolute;
    left: 0;
    top: 0;
    background: linear-gradient(90deg, rgba(21, 28, 46, 0) 0%, rgba(19, 26, 44, 0.61) 32%, #131A2C 45%, #182137 100%);
}

.banner2_l {
    width: 3.7rem;
    font-family: MiSans, MiSans;
    font-weight: 600;
    font-size: 0.4rem;
    color: #FFFFFF;
    line-height: 0.55rem;
    position: absolute;
    left: 2.2rem;
    top: 50%;
    transform: translateY(-50%);
    z-index: 100;
}

.banner2_r {
    width: 8rem;
    font-family: MiSans, MiSans;
    font-weight: 400;
    font-size: 0.16rem;
    color: #FFFFFF;
    line-height: 0.3rem;
    position: absolute;
    right: 2.2rem;
    top: 50%;
    transform: translateY(-50%);
    z-index: 100;
}

.content {
    width: 100%;
}

.content_box {
    width: 14.8rem;
    margin: 0 auto;
    padding: .8rem 0 .4rem;
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
}

.content1_item {
    width: 7.2rem;
    height: 5.4rem;
    background: #F2F2F2;
    border-radius: 0rem 0rem 0.2rem 0.2rem;
    border-top: .08rem solid #DA0C1A;
    box-sizing: border-box;
    padding: .4rem .4rem;
    /*margin-bottom: .6rem;*/
}

.content1_tit {
    font-family: MiSans, MiSans;
    font-weight: 400;
    font-size: 0.24rem;
    color: #3B3B3B;
    margin-bottom: .3rem;
}

.content1_txt {
    font-family: MiSans, MiSans;
    font-weight: 400;
    font-size: 0.16rem;
    color: #3B3B3B;
    line-height: 0.28rem;
}

.content2_item {
    width: 100%;
    height: 3rem;
    border-left: .08rem solid #DA0C1A;
    background: #F2F2F2;
    border-radius: 0rem 0.2rem 0.2rem 0rem;
    padding: .6rem;
    box-sizing: border-box;
    /*margin-bottom: .8rem;*/
}

.content2_tit {
    font-family: MiSans, MiSans;
    font-weight: 400;
    font-size: 0.24rem;
    color: #3B3B3B;
    margin-bottom: .4rem;
}

.content2_txt {
    font-family: MiSans, MiSans;
    font-weight: 400;
    font-size: 0.16rem;
    color: #3B3B3B;
    line-height: 0.28rem;
}

.content3_item {
    width: 3.15rem;
    height: 5.8rem;
    border-top: .08rem solid #DA0C1A;
    background: #F2F2F2;
    padding: .88rem .6rem;
    box-sizing: border-box;
    display: flex;
    align-items: center;
    cursor: pointer;
    transition: all .5s;
    overflow: hidden;
}

.content3_tit {
    font-family: MiSans, MiSans;
    font-weight: 400;
    font-size: 0.24rem;
    color: #3B3B3B;
    margin-bottom: 1rem;
    text-align: center;
}

.content3_txt {
    font-family: MiSans, MiSans;
    font-weight: 400;
    font-size: 0.16rem;
    color: #3B3B3B;
    line-height: 0.28rem;
    display: none;
}

.content3_list{
    font-family: MiSans, MiSans;
    font-weight: 400;
    font-size: 0.16rem;
    color: #3B3B3B;
    line-height: 0.28rem;
    margin-top: .2rem;
    display: none;
}

.content3_item_active{
    width: 8.2rem;
    align-items: normal;
    flex-direction: column;
    cursor: auto;
}

.content3_item_active .content3_tit{
    margin-bottom: .3rem;
    text-align: left;
}

.content3_item_active .content3_txt{
    display: block;
}

.content3_item_active .content3_list{
    display: block;
}

.content4 .content2_item{
    height: auto;
}

@media screen and (max-width:1024px){
    .nav{
                overflow: hidden;
    }
    .nav_box{
        width: 100%;
        margin-top: 10px;
        padding-left: 5px;

    }
    .nav_box a{
        width: fit-content;
        height: auto;
        padding: 5px 5px 5px 5px;
        font-size: 14px;
    }
    .banner2 {
        height:512px;
        width: 94%;
        margin-top: 10px;
        margin-left: auto;
        margin-right: auto;
        overflow: hidden;
    }
    .banner2_l{
        width:262px ;
        top: 11%;
        left: 13%;
        text-align: center;
    }
    .banner2_r{
        font-size: 14px;
        line-height: 1.5;
        width: fit-content;
        right: 0px;
        padding: 1px 5px 1px 5px;
        top: 57%;
    }
    .content{
        overflow: hidden;
    }
    .content_box{
        width: 94%;
    }
    .content3_item_active .content3_tit{
        font-size: 18px;
    }
    .content3_item_active .content3_txt{
        font-size: 14px;
        line-height: 1.5;
    }
    .content3_item_active{
     height: auto;   
    }
    .content3_tit {
     font-size: 14px;   
    }
    .content1_tit {
        font-size: 18px;
    }
    .content1_txt{
        font-size: 14px;
        line-height: 1.5;
    }
    .content1_item{
        height: auto;
    }
    .content2_tit{
        font-size: 18px;
    }
    .content2_txt{
        font-size: 16px;
        line-height: 1.5;
    }
    .footer{
        overflow: hidden;
    }
}