// 大屏尺寸2560*2560px
(function (doc, win) {
  var docEl = doc.documentElement
  var resizeEvt = 'orientationchange' in window ? 'orientationchange' : 'resize'
  var recalc = function () {
    var clientWidth = docEl.clientWidth
    if (!clientWidth) return
    // docEl.style.fontSize = 100 * (clientWidth / 1920) + 'px'
    docEl.style.fontSize = 100 * 2 + 'px'
    document.body.style.display = 'block'
  }
  if (!doc.addEventListener) return win.addEventListener(resizeEvt, recalc, false)
  doc.addEventListener('DOMContentLoaded', recalc, false)
})(document, window)