/**
 * rem璁＄畻鏂瑰紡锛氳璁″浘灏哄px / 100 = 瀹為檯rem  渚婜 100px = 1rem
 */
!function (window) {

    /* 璁捐鍥炬枃妗ｅ搴 */
    var docWidth = 750;

    var doc = window.document,
        docEl = doc.documentElement,
        resizeEvt = 'orientationchange' in window ? 'orientationchange' : 'resize';

    var recalc = (function refreshRem () {
        var clientWidth = docEl.getBoundingClientRect().width;

        /* 8.55锛氬皬浜?20px涓嶅啀缂╁皬锛?0锛氬ぇ浜?50px涓嶅啀鏀惧ぇ */
        docEl.style.fontSize = Math.max(Math.min(20 * (clientWidth / docWidth), 20), 8.55) * 5 + 'px';

        return refreshRem;
    })();

    /* 娣诲姞鍊嶅睆鏍囪瘑锛屽畨鍗撳€嶅睆涓? */
    docEl.setAttribute('data-dpr', window.navigator.appVersion.match(/iphone/gi) ? window.devicePixelRatio : 1);

    if (/iP(hone|od|ad)/.test(window.navigator.userAgent)) {
        /* 娣诲姞IOS鏍囪瘑 */ 
        doc.documentElement.classList.add('ios');
        /* IOS8浠ヤ笂缁檋tml娣诲姞hairline鏍峰紡锛屼互渚跨壒娈婂鐞 */
        //if (parseInt(window.navigator.appVersion.match(/OS (\d+)_(\d+)_?(\d+)?/)[1], 10) >= 8)
            //doc.documentElement.classList.add('hairline');
    }

    if (!doc.addEventListener) return;
    window.addEventListener(resizeEvt, recalc, false);
    doc.addEventListener('DOMContentLoaded', recalc, false);

}(window);