.material_div{height:100%;-ms-flex-wrap:wrap;flex-wrap:wrap}.material_div,.material_div .detail_div{display:-webkit-box;display:-ms-flexbox;display:flex}.material_div .detail_div{border:1px solid #ccc;width:520px;height:260px;-webkit-box-pack:justify;-ms-flex-pack:justify;justify-content:space-between;margin:18px}.material_div .detail_div .left{width:300px}.material_div .detail_div .right{width:220px;font-size:14px;padding:10px;color:#999}