.hd-bg{
    width: 100%;
    height: 60vh;
    position: relative;
    z-index: -1;
}
.hd-bg img{
    width: 100%;
    height: 100%;
    object-fit: cover;
}
.content-cn{
    width: 75%;
    margin: -15% auto 5%;
}
.hd-title{
    font-size: 3rem;
    font-family: SourceHanSansCN-Bold, SourceHanSansCN;
    font-weight: bold;
    color: #FFFFFF;
    text-align: center;
    margin: 5% 0;
}
.content-cn-box{
    width: 90%;
    border-radius: 10px;
    background-color: white;
    padding: 5%;
}
.contact-main{
    width: 100%;
    margin-top: 3%;
    display: table;
}
.contact-main-left,
.contact-main-right{
    display: table-cell;
}
.contact-main-left{
    width: 34%;
    padding: 3%;
    border: 1px solid #CCCCCC;
}
.main-title{
    margin: 5% 0;
}
.contact-main-l-item:first-of-type>.main-title:first-child{
    margin-top: 0;
}
.contact-main-l-item{
    border-bottom: 1px solid #ccc;
}
.contact-main-left .t1{
    font-size: 1.5rem;
    font-family: SourceHanSansCN-Medium, SourceHanSansCN;
    font-weight: 500;
    color: #004297;
}
.contact-main-left .t2{
    font-size: 1.125rem;
    font-family: SourceHanSansCN-Regular, SourceHanSansCN;
    font-weight: 400;
    color: #333333;
}

@media screen and (max-width: 750px){
    .hd-bg{
        height: 30vh;
    }
    .hd-title{
        display: none;
    }
    .contact-main{
        display: flex;
        flex-direction: column;
    }
    .content-cn{
        width: 95%;
    }
    .contact-main-left{
        width: 100%;
        box-sizing: border-box;
    }
    .contact-main-right{
        height: 300px;
    }
}