.header{border-bottom:1px solid #ddd}.loading{width:100%;text-align:center;margin-top:50px}.code-pic{margin-top:30px;height:400px;width:400px;padding:10px;background-color:#fff}.img{width:100%;height:100%;-o-object-fit:contain;object-fit:contain}.tips{margin-top:20px}.tips-info{font-size:12px;color:#7f7f7f}