body{
    padding: 0;
    margin: 0;
    font-family: "Microsoft YaHei";
    position: absolute;
    left: 0;
    top: 0;
}
.session1{
    height: auto;
    
    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;
}
@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;
}
.introduction > div{
    display: flex;
    align-items: center;
}
.introduction span{
    /* width: 49.5%; */
    display: inline-block;
    color: #676767;
    margin: auto;
    vertical-align: top;
    flex: 1;
    padding: 0 20px;
    margin: 0;
}
.introduction span img{
    width: 100%;
}
.introduction span.caseWord{
    /* 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;
}
.introduction span.caseImgRight img{
    /* margin-left: 40px; */
}
.introduction span.caseWordLeft .child1{
    /* margin-top: 30px; */
}
.introduction span.caseWordLeft .child3{
}

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

.introduction div:nth-child(2) span img{
    margin-top: 20px;
}

.introduction div:nth-child(3) span .child1{
    margin-top: 75px;
}

.introduction div:nth-child(4) img{
    margin-top: 0;
    /* margin-left:100px; */
}
.introduction div:nth-child(4) span .child1{
    margin-top: 5px;
}

@media only screen and (max-width: 768px){
    .introduction > div{
        display: inherit;
    }
    .caseWord{
        padding: 0 !important;
        text-align: justify;
    }
    .session1{
    }
    .position{
        padding: 5px 20px;
        top: 0;
        left: 0;
    }
    .position p {
        margin-top: 0 !important;
        font-size: 12px !important;
        line-height: 20px;
    }
    .introduction span.caseWordLeft{
        margin-right: 0;
    }
}