.qrcodes{flex-wrap:wrap;margin-top:100px;margin-bottom:100px}.qrcodes .item{margin-bottom:40px}.qrcodes .item dt{border:1px solid #dbdbdb;padding:20px;width:541px;height:495px;cursor:pointer}.qrcodes .item img{height:100%}.qrcodes .item dd{text-align:center;padding-top:38px;color:#5f5f5f;cursor:pointer;font-size:18px}@media screen and (max-width:500px){.qrcodes .item{width:100%}.qrcodes .item dt{width:100%;height:300px}}