/* 使用更具體且不衝突的 Class 名稱 */
.ad-carousel-viewport {
    width: 100%; 
    overflow: hidden;
    position: relative;
    /* 避免平移模糊的優化 */
    -webkit-font-smoothing: antialiased;
    backface-visibility: hidden;
}

.ad-carousel-list {
    display: flex;
    flex-direction: column;
    /* transition 由 JS 動態控制 */
}

.ad-carousel-item {
    transition: opacity 0.5s ease;
    opacity: 1;
}

.ad-carousel-item.is-fading {
    opacity: 0;
}