body{
    padding: 0;
    margin: 0;
    font-family: "Microsoft YaHei";
    position: absolute;
    left: 0;
    top: 0;
}
.session1{
    height: auto;
    min-width: 1200px;
    padding: 0;
    margin: 0;
}
.session1 img{
    width: 100%;
    vertical-align: bottom;
}
.position{
    position: absolute;
    left: 15%;
    top: 6%;
}
.position p:first-child{
    font-size: 30px;
    color: #ffffff;
    margin: 0;
    padding: 0;
}
.position p:last-child{
    font-size: 15px;
    line-height: 25px;
    color: #ffffff;
    margin: 0;
    margin-top: 40px;
    padding: 0;
    width: 500px;
}
@media only screen and (min-width: 0px) and (max-width: 1600px){
    .position{
        position: absolute;
        left: 13%;
        top: 5%;
    }
}
@media only screen and (min-width: 0px) and (max-width: 1400px){
    .position{
        position: absolute;
        left: 12%;
        top: 4%;
    }
}
@media only screen and (min-width: 0px) and (max-width: 1200px){
    .position{
        position: absolute;
        left: 120px;
        top: 90px;
    }
}


/*第二部分*/
.session2{
    width: 100%;
    text-align: center;
}
.introduction{
    margin: auto;
    width: 1200px;
    text-align: left;
}
.introduction span{
    width: 49.5%;
    display: inline-block;
    color: #676767;
    margin: auto;
    vertical-align: top;
}
.introduction span.caseWord{
    width: 500px;
    margin-left: 38px;
}
.introduction span .child1{
    font-size: 30px;
    margin-top: 60px;
    margin-bottom: 0;
    color: #000000;
}
.introduction span .child2{
    font-size: 20px;
    margin: 18px 0 18px 0;
    color: #000000;
}
.introduction span .child3{
    font-size: 14px;
    line-height: 30px;
    margin-bottom: 0;
}
.introduction span .move60{
    margin-top: 55px;
}
.introduction span .move50{
    margin-top: 30px;
}
.introduction div{
    width: 100%;
    padding: 63px 0 63px 0;
    border-bottom: 1px solid #cccccc;
}
.introduction span.caseWordLeft{
    margin-left: 0;
    margin-right: 50px;
    width: 550px;
}
.introduction span.caseImgRight img{
    margin-left: 40px;
}
.introduction span.caseWordLeft .child1{
    margin-top: 30px;
}
.introduction span.caseWordLeft .child3{
    width: 500px;
}

/*修改*/


.introduction div:nth-child(1) span .child1{
    margin-top: 15px;
}

.introduction div:nth-child(2) span .child3{
    margin-top: 55px;
}

.introduction div:nth-child(3) span .child1{
    margin-top: 50px;
}

.introduction div:nth-child(4) img{
    margin-left:100px;
}