平板设备
768 / 1024 = 0.75
834 / 1112 = 0.75
1024 / 1366 = 0.7496339677891654465592972181552
正常手机
320 / 568 = 0.56338028169014084507042253521127
360 / 640 = 0.5625
375 / 667 = 0.56221889055472263868065967016492
411 / 731 = 0.5622435020519835841313269493844
412 / 732 = 0.5628415300546448087431693989071
414 / 736 = 0.5625
iPhone X 系列手机
375 / 812 = 0.46182266009852216748768472906404
414 / 896 = 0.46205357142857142857142857142857