;(function(win, lib) {
    resizeRoot();
    function resizeRoot() {
        var wWidth = document.documentElement.clientWidth;
        //if (wWidth > 750) wWidth = 750;
        document.documentElement.style.fontSize = wWidth / 7.5 + 'px';
    }
    win.addEventListener('resize', function () {
        clearTimeout(tid);
        var tid = setTimeout(resizeRoot, 300);
    }, false);
})(window);