.pc-style .mid{
    width: 1120px;
    margin: 0px auto;
}
.pc-style .topic-list{
    padding: 10px 0px;
}
.pc-style .topic-list-inner{
    margin: 0px -20px;
}
.pc-style .topic-list-inner::after{
    content: "";
    display: block;
    clear: both;
}
.pc-style .topic-list .topic-item{
    float: left;
    width: 33.3%;
    box-sizing: border-box;
    padding: 10px;
}
.pc-style .topic-list .topic-item .item-inner{
    background: #ffffff;
    border-radius: 12px;
    display: block;
    overflow: hidden;
}
.pc-style .topic-list .topic-item .item-img{
    position: relative;
    background: #ffffff center center no-repeat;
    background-size: cover;
}
.pc-style .topic-list .topic-item .item-img::before{
    content: "";
    display: block;
    padding-top: 32%;
}
.pc-style .topic-list .topic-item .item-img img{
    position: absolute;
    top: 0px;
    left: 0px;
    width: 100%;
    height: 100%;
    opacity: 0;
}
.pc-style .topic-list .topic-item .item-des{
    padding: 20px;
}
.pc-style .topic-list .topic-item .item-title{
    margin-bottom: 5px;
}
.pc-style .topic-list .topic-item .item-title .title-text{
    font-size: 16px;
    display: block;
    white-space: nowrap;
    text-overflow:ellipsis;
    overflow: hidden;
}
.pc-style .topic-list .topic-item .item-info{
    color: #888888;
    font-size: 13px;
}


.mobile-style .topic-list {
    padding-top: 16px;
}

.mobile-style .topic-item {
    margin: 0px 16px 16px 16px;
}

.mobile-style .topic-item .item-inner {
    background: #ffffff;
    border-radius: 8px;
    overflow: hidden;
    display: block;
}

.mobile-style .topic-item .item-img {
    background: center center no-repeat;
    background-size: cover;
    position: relative;
}

.mobile-style .topic-item .item-img::before {
    content: "";
    display: block;
    padding-top: 32%;
}

.mobile-style .topic-item .item-img img {
    position: absolute;
    top: 0px;
    left: 0px;
    width: 100%;
    height: 100%;
}

.mobile-style .topic-item .item-des {
    padding: 16px;
}

.mobile-style .topic-item .item-des .item-title {
    font-size: 15px;
    margin-bottom: 5px;
}

.mobile-style .topic-item .item-des .item-info {
    font-size: 12px;
    color: #888888;
}

.mobile-style .load-status {
    margin: 0px 16px 16px 16px;
}

.mobile-style .load-status .btn-load-more {
    background: #ffffff;
    border-radius: 8px;
    text-align: center;
    display: block;
    line-height: 48px;
    color: #336699;
}

.mobile-style .load-status .is-loading {
    text-align: center;
    display: block;
    line-height: 48px;
    color: #888888;
}

.mobile-style .load-status .is-loading::before {
    content: "";
    display: inline-block;
    margin-right: 5px;
    background: url(https://wx.100xuexi.com/images/loading-1.gif) center center no-repeat;
    background-size: 16px;
    width: 16px;
    height: 16px;
    vertical-align: middle;
}

.mobile-style .load-status .has-loaded-all {
    text-align: center;
    display: block;
    line-height: 48px;
    color: #888888;
}