.advantage {
    margin-top: 30px;
    margin-bottom:80px;
}

.advantage .title {
    margin-bottom: 40px;
    font-size: 30px;
    color: #31475e;
    text-align: center;
    font-weight: 400
}

.advantage ul {
    margin-left: -20px;
    margin-right: -20px
}

.advantage ul li {
    float: left;
    width: 236px;
    margin-left: 20px;
    padding: 30px 20px;
    box-shadow: 0 3px 15px 0 rgba(224,224,224,.5);
    border: 1px solid #f0f3f7
}

.advantage ul li .icon {
    display: block;
    margin: 0 auto
}

.advantage ul li h4 {
    margin-top: 20px;
    color: #31475e;
    text-align: center;
    font-size: 18px;
    font-weight: 400
}

.advantage ul li p {
    margin-top: 15px;
    height: 130px;
    color: #6a7c92;
    font-size: 14px;
    line-height: 25px;
    font-weight: 400;
    text-align: justify
}

.icon-img-1 {
    background: url(../image/charge/icon_dh.png) no-repeat;
    background-size: 70px 70px;
    width: 70px;
    height: 70px
}

.icon-img-2 {
    background: url(../image/charge/icon_sy.png) no-repeat;
    background-size: 70px 70px;
    width: 70px;
    height: 70px
}

.icon-img-3 {
    background: url(../image/charge/icon_yb.png) no-repeat;
    background-size: 70px 70px;
    width: 70px;
    height: 70px
}

.icon-img-4 {
    background: url(../image/charge/icon_fs.png) no-repeat;
    background-size: 70px 70px;
    width: 70px;
    height: 70px
}

.icon-img-5 {
    background: url(../image/charge/icon_cx.png) no-repeat;
    background-size: 70px 70px;
    width: 70px;
    height: 70px
}

.icon-img-6 {
    background: url(../image/charge/icon_tx.png) no-repeat;
    background-size: 70px 70px;
    width: 70px;
    height: 70px
}

.icon-img-7 {
    background: url(../image/charge/icon_xm.png) no-repeat;
    background-size: 70px 70px;
    width: 70px;
    height: 70px
}

.icon-img-8 {
    background: url(../image/charge/icon_jk.png) no-repeat;
    background-size: 70px 70px;
    width: 70px;
    height: 70px
}


.container-nav-img li:nth-child(2) {
    background: rgba(0,0,0,0.7);
    border-radius: 20px;
}