.WfMainTxt>span,
.WfTxt2>span {
    font-size: 18px;
    line-height: 40px;
}

.PDThreeImg {
    display: flex;
    justify-content: space-around;
    flex-wrap: wrap;
}

.PDThreeImg.top {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
}

.system_container.top {
    width: 30%;
    margin-bottom: 20px;
    height: 200px;
}

.system_container {
    background: #fff;
    width: 24%;
    box-sizing: border-box;
    height: 300px;
    text-align: center;
}

.system_container>h2 {
    margin-bottom: 20px;
    color: #44a8f2;
}

.system_container img {
    height: 100%;
}