.ys {
        margin-top: 60px;
    }
    
    .ys li {
        width: 277px;
        height: 185px;
        border: 1px solid #dedeed;
        padding: 0 12px;
        text-align: center;
        float: left;
        margin-right: 10px;
        margin-top: 15px;
    }
    
    .ys li:nth-child(4),
    .ys li:nth-child(5),
    .ys li:nth-child(6) {
        margin-top: 80px;
    }
    
    .ys li:nth-child(3n) {
        margin-right: 0;
    }
    
    .ys li span {
        display: block;
        width: 150px;
        height: 121px;
        position: relative;
        margin: -60px auto 0;
        z-index: 9;
        overflow: hidden;
        font-size: 18px;
        color: #fff;
        text-align: center;
        line-height: 24px;
    }
    
    .ys li p em {
        font-style: normal;
        display: block;
        font-size: 18px;
        color: #333;
        font-weight: bold;
    }
    
    .ys li span img {
        margin: 5px auto 0;
        display: block;
    }