.det-div {
    padding: 0 100px;
    width: 1000px;
}

.det-div ul {

    margin: 72px 0 0 -33px;
    width:1068px;
}

.det-div ul li {
    width: 290px;
    float: left;
    overflow: hidden;
    margin: 0 33px 72px;
}

.det-div ul li span {
    display: block;
    width: 290px;
    height: 176px;
    overflow: hidden;
}

.det-div ul li span img {
    width: 290px;
    height: 176px;
    transition: all .3s;
}

.det-div ul li:hover img {
    transform: scale(1.3);
}

.det-div ul li p {
    line-height: 24px;
    text-align: justify;
    -ms-text-justify: inter-ideograph;
    text-justify: inter-ideograph;
    margin: 22px 0 0 0;
}