.nav .on h5 a{
    font-weight:800;}
ul.ywbk {
    height: calc(100vh - 72px);
    display: flex;}
ul.ywbk li {
    height:100%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-sizing: border-box;
    padding: 0 4%;
    position: relative;
    flex: 1;}
ul.ywbk li::after{
    content:'';
    display: block;
    position: absolute;
    width: 100%;
    height: 100%;
    background: linear-gradient(0deg, rgba(88, 38, 102, 0.8), rgba(88, 38, 102,1));
    transition: all .3s;
    box-sizing: border-box;
    border-left: 1px solid #fff3;}
ul.ywbk li:first-child::after{
    border-left: none;}
ul.ywbk li::before{
    content:'';
    display: block;
    position: absolute;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center bottom;}
ul.ywbk li:nth-child(1):before{
    background-image: url(./images/ywbk-hl-bg.png);}
ul.ywbk li:nth-child(2):before{
    background-image: url(./images/ywbk-cs-bg.png);}
ul.ywbk li:nth-child(3):before{
    background-image: url(./images/ywbk-dn-bg.png);}
ul.ywbk li:nth-child(4):before{
    background-image: url(./images/ywbk-syf-bg.png);}

ul.ywbk li>div {
    position: relative;
    z-index: 2;
    color: #fff;}

ul.ywbk li .mklogo {
    height: 80px;
    background-size: contain;
    background-repeat: no-repeat;
    background-position: center center;}


ul.ywbk li p {
    text-indent: 2em;
    font-size: 16px;
    line-height: 2;
    padding-top: 0;
    box-sizing: border-box;
    height: 0;
    overflow: hidden;
    transition: all .3s;
    padding-bottom: 0px;}

ul.ywbk li:hover:after {
    background: linear-gradient(0deg, rgba(88, 38, 102, 0.4), rgba(88, 38, 102, 1));}

ul.ywbk li:hover p {
    height: 346px;
    padding-top: 22px;
    padding-bottom: 100px;}

ul.ywbk li a {
    background: url(./images/ywbk-gd-default.png) no-repeat center center;
    height: 0;
    display: block;
    background-size: contain;
    transition: all .3s;}
ul.ywbk li a:hover {
    background: url(./images/ywbk-gd.png) no-repeat center center;
    height: 0;
    display: block;
    background-size: contain;}

ul.ywbk li:hover a {
    height: 52px;}