.yy h3 {
        font-size: 16px;
        font-weight: normal;
        color: #333;
        margin-bottom: 15px;
    }
    
    .yy ul li {
        float: left;
        width: 298px;
        margin-left: 15px;
    }
    
    .yy ul li:first-child {
        margin-left: 0;
    }
    
    .yy ul li img {
        width: 300px;
        height: 225px;
        border: 1px solid #dedede;
    }