css3语法: （750px设计图的1rem = 100px）

@media only screen and (min-width: 320px) and (max-width: 479px){ html { font-size: 42.67px !important; }}@media only screen and (min-width: 480px) and (max-width: 639px){ html { font-size: 64px !important; }}@media only screen and (min-width: 640px) and (max-width: 749px){ html { font-size: 85.34px !important; }}@media only screen and (min-width: 750px) and (max-width: 959px){ html { font-size: 100px !important; }}@media only screen and (min-width: 960px) and (max-width: 1241px){ html { font-size: 128px !important; }}@media only screen and (min-width: 1242px){ html { font-size: 165.6px !important; }}

js控制

（zepto / jQuery）（750px设计图的1rem = 100px）function setFont() { let window_width = window.innerWidth; let font_size = parseFloat(window_width / 3.75); $('html').css('font-size', font_size);}$(window).on('resize', function () { setFont();});

总结

以上所述是小编给大家介绍的CSS3中媒体查询结合rem布局适配手机屏幕，希望对大家有所帮助，如果大家有任何疑问欢迎给我留言，小编会及时回复大家的！