犯罪嫌疑人X
方法有很多种,我习惯用rem适配,把下面的复制粘贴拿走放到js里就行了。100px相当于1rem(function(doc, win) {var docEl = doc.documentElement, isIOS = navigator.userAgent.match(/\(i[^;]+;( U;)? CPU.+Mac OS X/), dpr = isIOS ? Math.min(win.devicePixelRatio, 3) : 1, dpr = window.top === window.self ? dpr : 1, //被iframe引用时,禁止缩放 dpr = 1, scale = 1 / dpr, resizeEvt = 'orientationchange' in window ? 'orientationchange' : 'resize';docEl.dataset.dpr = dpr;var metaEl = doc.createElement('meta');metaEl.name = 'viewport';metaEl.content = 'initial-scale=' + scale + ',maximum-scale=' + scale + ', minimum-scale=' + scale;docEl.firstElementChild.appendChild(metaEl);var recalc = function() { var width = docEl.clientWidth; if (width / dpr > 750) { width = 750 * dpr; } // 乘以100,px : rem = 100 : 1 docEl.style.fontSize = 100 * (width / 750) + 'px';};recalc()if (!doc.addEventListener) return;win.addEventListener(resizeEvt, recalc, false);})(document, window);