模板:Test/styles.css

.wiki-bg-fixed {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    overflow: hidden;
}
.wiki-bg-fixed img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
}