.rongyu {
    width: 100%;
    float: left;
    text-align: center;
}
.rongyu .lien {
    text-align: center;
    width: 31%;
    margin: 5px 1% 10px 1%;
    float: left;
    background: #e1f4ff;
    height: 350px;
    line-height: 24px;
}
.rongyu .lien .stt {
    height: 280px;
    float: left;
    width: 100%;
}
.rongyu .lien .stt img {
    width: 96%;
    height: auto;
    margin: 2% 2% 0 2%;
}
.rongyu .lien .xww {
    line-height: 26px;
    height: 26px;
    float: left;
    width: 100%;
}