更新：
@media screen and (min- 320px) { html {font-size: 14px;}}
@media screen and (min- 360px) { html {font-size: 16px;}}
@media screen and (min- 400px) {html {font-size: 18px;}}
@media screen and (min- 440px) {html {font-size: 20px;}}
@media screen and (min- 480px) {html {font-size: 22px;}}
@media screen and (min- 640px) {html {font-size: 28px;}}
@media screen and (min- 800px) and (max- 959px){html {font-size: 28px;}}
@media screen and (min- 960px) {html {font-size: 28px;}}
@media screen and (min- 1600px) {html {font-size: 38px;}}
上次那份字体太小了。。几位看过的客观。。抱歉