.case_list {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
}

.case_list a {
    box-sizing: border-box;
    width: 31%;
    /*    height: 405px;*/
    margin-top: 50px;
    border: 1px solid #d2d2d2;
    margin-right: 3rem;
    width: calc((100% - 33px*3)/ 3);
}

.case_list::after {
    content: "";
    flex: auto;
    width: 31% !important;
    margin-right: 0px;
    /*                    background-color: red*/
}

.case_list a:nth-child(3n+3) {
    margin-right: 0px;
}

.case_list a:hover .case_img img {
    transform: scale(1.1);
}

.case_list a:hover .case_lianjie {
    background-color: #bf0404;
    border: 1px solid #bf0404;
    background-image: url(../img/case_lj.png);
}

.case_img {
    width: 100%;
    height: 302px;
    overflow: hidden;
    background-color: beige;
}

.case_img img {
    width: 100%;
    height: 100%;
}

.case_btitle {
    height: 103px;
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    align-items: center;
    padding: 0px 20px;
}

.case_shuang {
    line-height: 30px;
}

.case_big {
    font-size: 24px;
    color: #414141;

}

.case_smail {
    font-size: 16px;
    color: #898989;
}

.case_lianjie {
    width: 45px;
    height: 45px;
    border-radius: 45px;
    border: 1px solid #d2d2d2;
    transition: .5s;
    background-image: url(../img/case_ljh.png);
    background-size: 20px 20px;
    background-repeat: no-repeat;
    background-position: center
}

.page>div {
    margin: 0 auto;
    display: flex;
    align-items: center;
    padding-top: 80px;
}

.page a {
    width: 100px;
    height: 50px;
    text-align: center;
    line-height: 50px;
    margin-right: 20px;
    color: #898989;
    display: block;
    border: 1px solid #dedede;
    transition: .5s
}

.page a:hover {
    background: #BF0404;
    color: white
}