.introduction-list1-box{
    width: 100%;
    display: block;

}

.introduction-list1-img{
    display: block;
    float: right;
    position: relative;
    padding: 20px;
    padding-right: 10px;
    padding-bottom: 0;
}
.introduction-list1-img img{
    vertical-align: middle;
}
.introduction-list1-img-border{
    width: 100%;
    height: 100%;
    display: block;
    position: absolute;
    top: 0 ;
    left: 0;
    padding: 10px;
    box-sizing: border-box;
}
.introduction-list1-img-border span{
    width: 100%;
    height: 100%;
    display: block;
    border: 1px solid #FFF;
}
.introduction-list-p{
    font-size: 16px;
    text-align: justify;
    color: #333333;
    line-height: 2.5;
}

.introduction-list1-box  .introduction-list-p:nth-child(3){
    padding-top: 70px;
}

.introduction-list-border-box{
    width: 100%;
    height: 100%;
    display: block;
    position: relative;
}

.style1{
    color: #000;
    font-weight: bold;
    font-size: 16px;
}
.style2{
    color: #000;
    font-weight: bold;
    font-size: 18px;
}
.introduction-list2-box{
    margin-top: 30px;
}
.introduction-list2-box .introduction-list-p{
    padding-bottom: 30px
}

.introduction-list3-img-box,
.introduction-list4-img-box{
    width: 100%;
    display: block;
    position: relative;
}
.introduction-list3-img-box .mid{
    position: absolute;
    top: -20px;
    left: calc(50% - 190px);
    z-index: 2;
}
.introduction-list3-img-box .left{
    z-index: 1;
}
.introduction-list3-img-box .right{
    z-index: 3;
}
.introduction-list3-box{
    margin-top: 20px;
    margin-bottom: 20px;
}
.introduction-list4-box{
    padding-bottom: 50px;
}
.introduction-list4-img-box .mid{
    position: absolute;
    top: -20px;
    left: calc(50% - 190px);
}