.serviceD-session1{
    position:relative;
    width:100%;
    height:720px;
    background-position:50% 50%;
}
.serviceD-session1 img{
    width:100%;
    height:100%;
}


.serviceD-session1 p{
    position: absolute;
    top:50%;
    left:0;
    right:0;
    margin:0 auto;
    margin-top:-15px;
    width:600px;
    height:30px;
    line-height: 30px;
    text-align: center;
    font-size:36px;
    color:#015198;
    font-weight:100;
}

.serviceD-session1 .d-s1-introduce{
    position:absolute;
    bottom: 18px;
    right:0;
    left:0;
    margin:0 auto;

    width:1200px;
    font-size:16px;
    color:#fff;
    font-weight:500;
    text-align: center;
}

.serviceD-session2{
    position:relative;
    width:100%;
}


.serviceD-session3{
    position:relative;
    width:100%;
    background-color:#fff;
}