body{
    background-color: #fff;
}

.main{
    position: relative;
    width: 100%;
    padding-bottom: 50px;
    background: url(/zhphone/public/images/bjtu_02.jpg) no-repeat center;
    background-size: 100% 100%;
}

.center{
    padding: 110px 30px 0;
    box-sizing: border-box;
}

.title>h1{
    margin-top: 60px;
    font-size: 36px;
    color: #fff;
    /* line-height: 36px; */
    text-align: center;
    margin-bottom: 60px;
}
.link_wrapper{
    font-size: 0;
}
.link_wrapper>a:nth-child(1){
    display: inline-block;
    width: 580px;
    height: 200px;
    margin-bottom: 20px;
    background: url("/zhphone/public/images/lianjie1_03.png") no-repeat center center;
}
.link_wrapper>a:nth-child(2){
    display: inline-block;
    width: 580px;
    height: 200px;
    margin-bottom: 20px;
    background: url("/zhphone/public/images/lianjie2_03.png") no-repeat center center;
}
.link_wrapper>a:nth-child(3){
    display: inline-block;
    width: 580px;
    height: 200px;
    margin-bottom: 20px;
    background: url("/zhphone/public/images/lianjie3_03.png") no-repeat center center;
}
.link_wrapper>a:nth-child(4){
    display: inline-block;
    width: 580px;
    height: 200px;
    margin-bottom: 20px;
    background: url("/zhphone/public/images/lianjie4_03.png") no-repeat center center;
}
.ygtd-1{font-size: 32px;font-weight: bold;color: white;display: block;line-height: 32px;margin-top: 65px;margin-left: 70px;}
.ygtd-2{font-size: 22px;color: white;display: block;line-height: 22px;margin-left: 70px;margin-top: 17px;}