.num ul li.on img {
    border: none;
}
.min_pic div ul li span {
    height: 20px;
    width: 100%;
    background: rgba(102, 102, 102, 0.4);
    color: #fff;
    text-align: center;
    position: absolute;
    bottom: 0;
}
.main_hx {
    width:542px !important;
}