/* 缩略图 */
img.thumbnail, .thumbnail img {
    height: 171px !important;
    /*width: 100%;*/
    text-align:center;
}

@media only screen and (min-device-width : 768px) and (max-device-width : 1024px) {
    img.thumbnail, .thumbnail img {
        height: 400px !important;
        /*width: 100%;*/
    }
}

@media only screen and (min-device-width : 320px) and (max-device-width : 768px) {
    img.thumbnail, .thumbnail img {
        height: 200px !important;
        /*width: 100%;*/
    }
}