.slideshow {
    height: 400px;
    object-fit: cover;
}

/* SEO优化用隐藏主标题 */
.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0 0 0 0);
    white-space: nowrap;
    border: 0;
}