.list-xg-case {
    background: #f3f3f3;
    padding: 50px 0 70px 0;
}
.list-xg-case li:first-child {
    margin-left: 0;
}

.list-xg-case li {
    width: 402px;
    float: left;
    margin-left: 25px;
    margin-top: 30px;
}
ul, li {
    list-style: none;
}
.list-xg-case li .pic {
    width: 402px;
    height: 242px;
    overflow: hidden;
    position: relative;
}
.list-xg-case li .pic img {
    -webkit-transition: all 700ms ease;
    transition: all 700ms ease;
}
.list-xg-case li h3 {
    color: #373737;
    height: 24px;
    overflow: hidden;
    font-size: 19px;
    margin-top: 10px;
    margin-bottom: 5px;

}
.list-xg-case li p {
    font-size: 13px;
    color: #868686;
    line-height: 20px;
    height: 40px;
    overflow: hidden;
}
.list-xg-case li:hover .pic img {
    -webkit-transform: scale(1.1);
    -ms-transform: scale(1.1);
    transform: scale(1.1);
}
.list-xg-case li .pic img {
    -webkit-transition: all 700ms ease;
    transition: all 700ms ease;
}