.online-box{
    margin-bottom: 30px;
    width: 90%;
    position: relative;
    padding: 0;
    display: flex;
    flex-wrap: wrap;
    justify-content: flex-start;
}
.online-item{
    background-color: #fff;
    padding: 15px;
    display: flex;
    flex-direction: column;
    width: 31%;
    margin-right: 20px;
    margin-bottom: 20px;
}
.online-img{
    width: 320px;
    height: 220px;
    overflow: hidden;
}
.online-item img {
    transition: all 0.3s;
}
.online-item:hover img{
    transform: scale(1.05);
 }
.online-item img{
    width: 320px;
    height: 220px;
}
.online-item span{
  display: inline-block;
    width: 100%;
  font-size: 18px;
    text-align: center;
    margin: 15px 0px 10px 0px;
    overflow: hidden;
  white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}