body {
    -moz-user-select: none; /*火狐*/
    -webkit-user-select: none; /*webkit浏览器*/
    -ms-user-select: none; /*IE10*/
    user-select: none;
}

.box {
    width: 100%;
    height: 900px;
}

.img {
    margin-bottom: 30px;
}

.ull ul {
    text-align: center;
}

.ul ul li {
    width: 90%;
    margin: 0 auto 20px auto;
    border-radius: 2px;
}

.ul ul li img {
    width: 100%;
    height: auto;
    border-radius: 2px;
}