.main{
    width: 100%;
    height: auto;
}

.beijing1{
    background: url(../images/ydl_01.jpg) no-repeat center center;
    width: 100%;
    height:729px;
}
.beijing2{
    background: url(../images/ydl_02.jpg) no-repeat center center;
    width: 100%;
    height:677px;
}
.beijing3{
    background: url(../images/ydl_03.jpg) no-repeat center center;
    width: 100%;
    height:705px;
}
.beijing4{
    background: url(../images/ydl_04.jpg) no-repeat center center;
    width: 100%;
    height:853px;
}

.beijing5{
    background: url(../images/ydl_05.jpg) no-repeat center center;
    width: 100%;
    height:676px;
}
.beijing6{
    background: url(../images/ydl_06.jpg) no-repeat center center;
    width: 100%;
    height:827px;
}

.beijing7{
    background: url(../images/ydl_07.jpg) no-repeat center center;
    width: 100%;
    height:2105px;
}
.beijing8{
    width: 100%;
    height:863px;
}

.pro{
    text-align: center;
    width: 1212px;
    height: 620px;
    margin:0 auto 100px auto;

}
.proh{
    display: flex;
    width: 1212px;
    height: 679px;
    margin:auto;
}
.proh .pro_p img{
    margin: 0 8px;
}


.pros{
    display: flex;
    width: 1212px;
    height: 519px;
    margin:100px auto 0px auto;
}

.pros .pro_l img{
    margin: 0 8px;
}