text: /*!
   * 可伸缩布局方案 flexible.js
   * @Author：amfe
   * @github：https://github.com/amfe/lib-flexible
   */
  ;(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) {
              // iOS下，对于2和3的屏，用2倍的方案，其余的用1倍方案
              if (devicePixelRatio >= 3 && (!dpr || dpr >= 3)) {                
                  dpr = 3;
              } else if (devicePixelRatio >= 2 && (!dpr || dpr >= 2)){
                  dpr = 2;
              } else {
                  dpr = 1;
              }
          } else {
              // 其他设备下，仍旧使用1倍的方案
              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 > 540) {
              width = 540 * 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'] = {}));