document.addEventListener('DOMContentLoaded', function () {
    /** business图片滚动动画 */
    const galleryList = document.querySelector('.gallery-list');
    const galleryImgs = galleryList ? galleryList.querySelectorAll('img') : [];
    if (galleryList && galleryImgs.length > 0) {
        let currentIndex = 0;
        const imgCount = galleryImgs.length;
        const imgHeight = galleryImgs[0].offsetHeight + parseInt(getComputedStyle(galleryImgs[0]).marginBottom);
        let isAnimating = false;

        // 克隆首图到末尾实现无缝滚动
        const clone = galleryImgs[0].cloneNode(true);
        galleryList.appendChild(clone);

        function scrollNext() {
            if (isAnimating) return;
            isAnimating = true;
            currentIndex++;
            galleryList.style.transition = 'transform 0.8s cubic-bezier(.4,0,.2,1)';
            galleryList.style.transform = `translateY(-${imgHeight * currentIndex}px)`;
            // 滚动到克隆图后，瞬间回到首图
            if (currentIndex === imgCount) {
                setTimeout(() => {
                    galleryList.style.transition = 'none';
                    galleryList.style.transform = 'translateY(0)';
                    currentIndex = 0;
                    // 强制reflow
                    void galleryList.offsetWidth;
                    isAnimating = false;
                }, 820);
            } else {
                setTimeout(() => {
                    isAnimating = false;
                }, 820);
            }
        }
        setInterval(scrollNext, 2500);
    }
});