.main {
    height: 100%;
    background-position: center;
    background-repeat: no-repeat;
    background-size: cover;
}

.center_body_so {
    margin-top: 22vh;
}

.so_ul {
    display: flex;
    flex-wrap: wrap;
}

.item {
    width: calc(33.33% - 24px);
    display: inline-block;
    vertical-align: top;
    margin: 0 12px;
    position: relative;
    text-align: center;
    background: #fff;
    padding-bottom: 90px;
    overflow: hidden;
    margin-bottom: 25px;
}

.item .img_block {
    overflow: hidden;
}

.item .img_block img {
    width: 100%;
    display: block;
}

.item .txt_block {
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    background: #fff;
    padding: 0 30px 20px;
    -webkit-transform: translateY(-90px);
    -moz-transform: translateY(-90px);
    -ms-transform: translateY(-90px);
    transform: translateY(-90px);
    -webkit-transition: all 0.3s ease;
    -moz-transition: all 0.3s ease;
    -ms-transition: all 0.3s ease;
    transition: all 0.3s ease;
}

.item .show {
    height: 90px;
}

.cell_box {
    font-size: 0;
}

.cell_box:before {
    content: '';
    height: 100%;
    display: inline-block;
    vertical-align: middle;
}

.cell_box .cell {
    width: 100%;
    display: inline-block;
    vertical-align: middle;
}

.item h3 {
    font-size: 18px;
    color: #333;
    white-space: nowrap;
    text-overflow: ellipsis;
    overflow: hidden;
    -webkit-transition: all 0.3s ease;
    -moz-transition: all 0.3s ease;
    -ms-transition: all 0.3s ease;
    transition: all 0.3s ease;
}

.item h4 {
    font-size: 12px;
    color: #0057cd;
    text-transform: uppercase;
    font-family: 'SourceHanSansCN-Light';
    white-space: nowrap;
    text-overflow: ellipsis;
    overflow: hidden;
    -webkit-transition: all 0.3s ease;
    -moz-transition: all 0.3s ease;
    -ms-transition: all 0.3s ease;
    transition: all 0.3s ease;
    margin-top: 4px;
}

.item p {
    font-size: 14px;
    color: #fff;
    text-align: justify;
    padding-bottom: 12px;
    margin-bottom: 12px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
}

.item span {
    color: #fff;
    font-size: 14px;
}

.cell_box span {
    color: #fff;
    font-size: 14px;
}

.item:hover .txt_block {
    background: #0057cd;
    -webkit-transform: translateY(-100%);
    -moz-transform: translateY(-100%);
    -ms-transform: translateY(-100%);
    transform: translateY(-100%);
}

.item:hover .txt_block h3,
.item:hover .txt_block h4 {
    color: #fff;
}

.item:hover .txt_block h4 {
    opacity: .2;
}

.subpage_ad {
    display: none;
}

.h1,
.h2,
.h3,
h1,
h2,
h3,
.h4,
.h5,
.h6,
h4,
h5,
h6 {
    margin: 0;
}

.h1,
.h2,
.h3,
.h4,
.h5,
.h6 {
    font-weight: normal;
}

.center_body {
    width: 80%;
}

@media(min-width:1024px) {
    .so_li:nth-child(3n) {
        margin-right: 0;
    }
}

@media(max-width:1024px) {
    .main {
        padding: 0vh 20px;
        background-image: none !important;
        height:auto !important;
    }
    .center_body_so {
        width: 94%;
        margin-top: 15px;
    }
    .item {
        width: 100%;
        margin: 10px auto;
        display: block;
        max-width: 384px;
        box-shadow: 0px 0px 30px 1px rgba(0, 0, 0, 0.07999999821186)
    }
    .subpage_ad {
        display: block;
    }
    .item:hover .txt_block {
        background: #0057cd;
        -webkit-transform: translateY(-100%);
        -moz-transform: translateY(-100%);
        -ms-transform: translateY(-100%);
        transform: translateY(-100%);
    }
    .item p {
        font-size: 12px;
        line-height: 18px;
        margin-top: -10px;
    }
}