(function(win,lib){var doc=win.document;var docEl=doc.documentElement;var metaEl=doc.querySelector('meta[name="viewport"]');var flexibleEl=doc.querySelector('meta[name="flexible"]');var dpr=0;var scale=0;var tid;var flexible=lib.flexible||(lib.flexible={});if(metaEl){console.warn("将根据已有的meta标签来设置缩放比例");var match=metaEl.getAttribute("content").match(/initial\-scale=([\d\.]+)/);if(match){scale=parseFloat(match[1]);dpr=parseInt(1/scale)}}else{if(flexibleEl){var content=flexibleEl.getAttribute("content");if(content){var initialDpr=content.match(/initial\-dpr=([\d\.]+)/);var maximumDpr=content.match(/maximum\-dpr=([\d\.]+)/);if(initialDpr){dpr=parseFloat(initialDpr[1]);scale=parseFloat((1/dpr).toFixed(2))}if(maximumDpr){dpr=parseFloat(maximumDpr[1]);scale=parseFloat((1/dpr).toFixed(2))}}}}if(!dpr&&!scale){var isAndroid=win.navigator.appVersion.match(/android/gi);var isIPhone=win.navigator.appVersion.match(/iphone/gi);var devicePixelRatio=win.devicePixelRatio;if(isIPhone){if(devicePixelRatio>=3&&(!dpr||dpr>=3)){dpr=3}else{if(devicePixelRatio>=2&&(!dpr||dpr>=2)){dpr=2}else{dpr=1}}}else{dpr=1}scale=1/dpr}docEl.setAttribute("data-dpr",dpr);if(!metaEl){metaEl=doc.createElement("meta");metaEl.setAttribute("name","viewport");metaEl.setAttribute("content","initial-scale="+scale+", maximum-scale="+scale+", minimum-scale="+scale+", user-scalable=no");if(docEl.firstElementChild){docEl.firstElementChild.appendChild(metaEl)}else{var wrap=doc.createElement("div");wrap.appendChild(metaEl);doc.write(wrap.innerHTML)}}function refreshRem(){var width=docEl.getBoundingClientRect().width;if(width/dpr>750){width=750*dpr}var rem=width/10;docEl.style.fontSize=rem+"px";flexible.rem=win.rem=rem}win.addEventListener("resize",function(){clearTimeout(tid);tid=setTimeout(refreshRem,300)},false);win.addEventListener("pageshow",function(e){if(e.persisted){clearTimeout(tid);tid=setTimeout(refreshRem,300)}},false);if(doc.readyState==="complete"){doc.body.style.fontSize=12*dpr+"px"}else{doc.addEventListener("DOMContentLoaded",function(e){doc.body.style.fontSize=12*dpr+"px"},false)}refreshRem();flexible.dpr=win.dpr=dpr;flexible.refreshRem=refreshRem;flexible.rem2px=function(d){var val=parseFloat(d)*this.rem;if(typeof d==="string"&&d.match(/rem$/)){val+="px"}return val};flexible.px2rem=function(d){var val=parseFloat(d)/this.rem;if(typeof d==="string"&&d.match(/px$/)){val+="rem"}return val}})(window,window["lib"]||(window["lib"]={}));
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