window.addEventListener('load', function () {
    var prefersReducedMotion = window.matchMedia('(prefers-reduced-motion: reduce)').matches;

    setTimeout(function () {
        AOS.init({
            duration: 600,
            easing: 'ease-out-sine',
            once: true,
            offset: 80,
            disable: prefersReducedMotion
        });
    }, 800);

    document.querySelectorAll(".go-top").forEach(function (element) {
        element.addEventListener("click", function (e) {
            e.preventDefault();
            window.scrollTo({ top: 0, behavior: 'smooth' });
        });
    });

    // Banner 輕量視差（僅桌面版 + 非 reduced-motion）
    if (!prefersReducedMotion && window.innerWidth >= 992) {
        var bannerImg = document.querySelector('#article-00 .banner-hero-img');
        if (bannerImg) {
            var parallaxReady = false;
            var ticking = false;

            bannerImg.addEventListener('animationend', function () {
                parallaxReady = true;
            });

            // 若動畫已跳過或完成，3 秒後強制啟用
            setTimeout(function () { parallaxReady = true; }, 3000);

            window.addEventListener('scroll', function () {
                if (!parallaxReady || ticking) return;
                ticking = true;
                window.requestAnimationFrame(function () {
                    var scrollY = window.pageYOffset;
                    var bannerHeight = bannerImg.offsetHeight;
                    if (scrollY <= bannerHeight) {
                        bannerImg.style.transform = 'translateY(' + (scrollY * 0.3) + 'px)';
                    }
                    ticking = false;
                });
            }, { passive: true });
        }
    }

    // 標章滑入完成後啟動脈動循環
    if (!prefersReducedMotion) {
        document.querySelectorAll('.banner-badge-animate').forEach(function(badge) {
            badge.addEventListener('animationend', function(e) {
                if (e.animationName === 'badgeSlideIn') {
                    badge.classList.remove('banner-badge-animate');
                    badge.style.opacity = '1';
                    badge.classList.add('banner-badge-loop');
                }
            });
        });
    }

});

function GA(action, category, label) {
    gtag('event', action, {
        'event_category': category,
        'event_label': label,
        'value': 1
    });
}