.banner-box{
    width: 100%;
    height: 413px;
    background: url('/jingtai/images/us_02.jpg') center/cover no-repeat; 
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}
.banner-box p:nth-child(1){
    font-size: 36px;
	font-weight: bold;
	color: #ffffff;
}
.banner-box p:nth-child(2){
    font-size: 14px;
    color: #ffffff;
    line-height: 30px;
}
ul.nav{
    width: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    border-bottom: 1px solid #e2e2e2;
}
ul.nav li{
    padding: 10px 20px;
    font-size: 14px;
    color: #282828;
    cursor: pointer;
}
ul.nav li.active{
    color: #1f83f2;
    font-weight: bold;
    border-bottom: 1px solid #1f83f2;
}
.cenbox{
    width: 100%;
    padding: 80px 0;
}
.cenbox .content{
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    flex-wrap: wrap;
    /* justify-content: space-around; */
}
.cenbox .content div{
    width: 353px;
    height: 180px;
    margin-right: 40px;
}
.cenbox .content div>p{
    font-size: 18px;
	font-weight: bold;
	line-height: 28px;
	color: #214174;
}
.cenbox .content div ul li p{
    font-size: 14px;
	line-height: 28px;
    color: #8c8c8c;
}
@media screen and (max-width: 1200px) {
   
}
@media screen and (max-width: 992px) {
   
}
@media screen and (max-width: 750px) {
    .banner-box{
        height: 4.13rem;
    }
    .banner-box p:nth-child(1){
        font-size: .36rem;
    }
    .banner-box p:nth-child(2){
        font-size: .14rem;
        line-height: .3rem;
    }
    ul.nav{
        justify-content: space-around;
    }
    ul.nav li{
        padding: .2rem 0;
        font-size: .12rem;
    }
    .cenbox{
        padding: .8rem 0;
    }
    .cenbox .content{
        padding: 0 2%;
    }
    .cenbox .content div{
        width: 100%;
        height: auto;
        margin-bottom: .3rem;
        margin-right: 0;
    }
    .cenbox .content div>p{
        font-size: .18rem;
        font-weight: bold;
        line-height: .6rem;
        color: #214174;
    }
    .cenbox .content div ul li p{
        font-size: .14rem;
        line-height: .4rem;
        color: #8c8c8c;
    }
}