.b-container{
    background:#f2f6ff;
    max-width:192rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    box-sizing: border-box;
}
.b-header{
    height:17rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content:center;
    box-sizing: border-box;
}
.b-header h1{
    font-size:4.6rem;
    margin-bottom: 4rem;
}
.b-header h2{
    color:#818588;
    font-size: 3rem;
    font-weight: 500;
    letter-spacing: 0.5rem;
}
.b-content{
    height:101rem;
    box-sizing: border-box;
    background:#fff;
    width:178rem;
    border-radius: 1.5rem;
    box-sizing: border-box;
    padding: 6rem;
    margin-top: 6.5rem;
    margin-bottom: 5rem;
}
.b-nav{
    display: flex;

    border-bottom: 0.2rem solid #e2e2e2;

    align-items: flex-end;
    justify-content: space-between;
    box-sizing: border-box;
}
.b-nav li{
    height:7rem;
    line-height: 7rem;
    font-size: 3.4rem;
    letter-spacing:0.4rem;
    color:#3069fe;
    box-sizing: border-box;
    box-sizing: border-box;
    font-weight: 500;
}

.nav-active{
    border-bottom: 0.6rem solid #2467fe;
    margin-bottom: -0.2rem;
}
.b-detail{
    width:100%;
    height: 78rem;
    display: flex;
    box-sizing: border-box;

}
.b-detail-icon{
    height:100%;
    flex-basis:70rem;
    display: flex;
    justify-content: center;
    align-items: center;
}
.b-detail-desc{
    flex-grow:1;
    box-sizing: border-box;
    box-sizing: border-box;
    padding-left: 4.5rem;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.b-detail-desc h2{
    font-size:3rem;
    font-weight: 500;
    line-height: 6rem;
    letter-spacing: 0.5rem;
    color: #666666;
}
.b-sub-desc-wraper{
    display: flex;
    margin-top:10rem;
    box-sizing: border-box;
}
.b-sub-desc{
    margin-right: 7rem;
}
.b-sub-desc-item{
    display:flex;
    align-items: center;
    margin-bottom: 4rem;
    box-sizing: border-box;
}
.b-sub-desc-item p{
    color: #3068ef;
    font-size: 3rem;
    margin-left: 0.6rem;
    font-weight: 500;
}
.b-sub-desc-item img{

    height:4.7rem;
}
.item-icon{
    width: 7rem;
}