(function(doc, win) {
  var docEl = doc.documentElement,
    resizeEvt = 'orientationchange' in window ? 'orientationchange' : 'resize',
    recalc = function() {
      var clientWidth = docEl.clientWidth;
      if (!clientWidth) return;
      if (clientWidth >= 640) {
        docEl.style.fontSize = '85px';
      } else {
        docEl.style.fontSize = 100 * (clientWidth / 750) + 'px';
      }
    };
  if (!doc.addEventListener) return;
  win.addEventListener(resizeEvt, recalc, false);
  doc.addEventListener('DOMContentLoaded', recalc, false);
})(document, window);
$(function() {

  var sUserAgent = navigator.userAgent.toLowerCase();
  if (/ipadss|iphonessss|midpss|rv:1.2.3.4|ucwebss|androidss|windows cess|windows mobiless/.test(sUserAgent)) {
    //移动端
    window.onscroll = function() {
      // console.log($(document).scrollTop());
      if ($(document).scrollTop() > 300) {
        $('#gotop').fadeIn(150)
      } else {
        $('#gotop').fadeOut(150)
      }
    }

  } else {
    //pc端    
  }


  $('#gotop').on('click', function() {
    $('body,html').animate({ scrollTop: 0 }, 300);
  })
  $('.m_nav').on('click', function() {
    $('body').toggleClass('site-mobiless')
  })

  $('.site-mobiless-shade').on('click', function() {
    $('body').removeClass('site-mobiless')
  })






})