.page_banner {
    background: url("../images/banner/case_banner.png") no-repeat center
}

.case_list {
    padding-top: 50px
}

.case_list li {
    width: 288px;
    margin: 0 5px 10px;
    border: 1px solid #eee
}

.case_list li:hover .case_info {
    left: 0
}

.case_list .imgs_box {
    width: 288px;
    height: 259px;
    position: relative
}

.case_list .imgs_box img {
    max-width: 288px;
    max-height: 259px
}

.case_info {
    position: absolute;
    left: -100%;
    top: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    text-align: center;
    z-index: 2;
    -webkit-transition: left .5s linear;
    -moz-transition: left .5s linear;
    -o-transition: left .5s linear;
    -ms-transition: left .5s linear;
    transition: left .5s linear
}

.case_info h3 {
    width: 100%;
    color: #ffffff;
    font-weight: bold
}

.page_tab_list li a {
    padding: 0 15px;
}