.clearfix:after {
    display: block;
    content: '';
    height: 0;
    visibility: hidden;
    clear: both;
}

.clearfix {
    zoom: 1;
}


/**主体部分**/

main {
    background: url(jb.png) center top no-repeat;
    position: relative;
}
main .bt-box-1200{
  padding-top:40px;
}

.zt_title {
    height: 40px;
    line-height: 40px;
    font-size: 28px;
    color: #333;
    font-weight: 700;
    text-align: center;
    background: url(titleBg.png) center center no-repeat;
}

.newZt li {
    float: left;
    width: 277px;
    height: 150px;
    margin-left: 30px;
    margin-top: 32px;
}

.newZt li:nth-child(4n+1) {
    margin-left: 0;
}

.newZt li a {
    display: block;
    width: 100%;
    height: 100%;
}

.newZt li a img {
    width: 100%;
    height: 100%;
}

.oldZt {
    margin-top: 40px;
}

.oldZt li {
    float: left;
    width: 585px;
    height: 100px;
    background: #fff;
    box-shadow: 0 0 18px #cfcfcf73;
    margin-left: 30px;
    margin-top: 30px;
    padding: 15px 20px 20px 60px;
    background: url(qz.png) 20px 20px no-repeat;
}

.oldZt li:nth-child(2n+1) {
    margin-left: 0;
}

.oldZt li a {
    display: block;
    font-size: 16px;
    line-height: 32px;
    color: #333;
    overflow: hidden;
    white-space: nowrap;
    text-overflow: ellipsis;
    width: 100%;
}

.oldZt li span {
    float: left;
    font-size: 14px;
    line-height: 28px;
    color: #999;
    margin-right: 30px;
}

.ztTime {
    margin-top: 5px;
}

@media (max-width: 767px) {
    body {
        background: #fff!important;
    }
    main {
        background: #fff;
        padding: 0;
    }
    main .bt-box-1200 {
        padding: 1.5rem;
    }
    .zt_title {
        font-size: 2.125rem;
    }
    .newZt li {
        width: 21.1875rem;
        height: 12.0625rem;
        margin-left: 1.5rem;
        margin-top: 1.5rem;
    }
    .newZt li:nth-child(4n+1) {
        margin-left: 1.5rem;
    }
    .newZt li:nth-child(2n+1) {
        margin-left: 0;
    }
    .oldZt li {
        width: 100%;
        height: auto;
        margin-left: 0;
        margin-top: 1.5rem;
    }
    .oldZt li a {
        white-space: normal;
        font-size: 1.875rem;
    }
    .oldZt li span {
        font-size: 1.625rem;
    }
}


/**适老化**/

.old_type .zt_title {
    font-size: 36px;
}

.old_type .newZt li {
    width: 585px;
    height: 295px;
}

.old_type .newZt li:nth-child(4n+1) {
    margin-left: 30px;
}

.old_type .newZt li:nth-child(2n+1) {
    margin-left: 0;
}

.old_type .oldZt li {
    height: auto;
}

.old_type .oldZt li a {
    font-size: 32px;
    line-height: 70px;
}

.old_type .oldZt li span {
    font-size: 26px;
    line-height: 60px;
}