(function() {

    var docElem = document.documentElement,
        didScroll = false,
        changeHeaderOn = 50;
    document.querySelector('header');

    function init() {
        window.addEventListener('scroll', function() {
            if (!didScroll) {
                didScroll = true;
                setTimeout(scrollPage, 100);
            }
        }, false);
    }

    function scrollPage() {
        var sy = scrollY();
        if (sy >= changeHeaderOn) {
            $('.header').css("background-color", "#122A88");
            $('.nav .navLi>a').css("color", "#fff");


        } else {
            $('.header').css("background-color", "rgba(0,0,0,0)");


        }
        didScroll = false;
    }

    function scrollY() {
        return window.pageYOffset || docElem.scrollTop;
    }
    init();
    a_mao();
})();

$(".cnenNavLi").click(function() {
        $(".cnenList").toggleClass("up")

    })
    // 锚点平滑跳转
function a_mao() {
    $('a[href*=#],area[href*=#]').click(function() {
        if (location.pathname.replace(/^\//, '') == this.pathname.replace(/^\//, '') && location.hostname == this.hostname) {
            var $target = $(this.hash);
            $target = $target.length && $target || $('[name=' + this.hash.slice(1) + ']');
            if ($target.length) {
                var targetOffset = $target.offset().top;
                $('html,body').animate({
                        scrollTop: targetOffset
                    },
                    1000);
                return false;
            }
        }
    });
}