查看“︁MediaWiki:Common.css”︁的源代码

/* ===== 自定义背景图片（适配多比例） ===== */

/* 亮色模式：覆盖 html + body + 内容层 */
html:not(.skin-theme-clientpref-night) {
    background-color: #f5f5f5 !important;
    background-image: url('/images/0/07/Light.jpg') !important;
    background-size: cover !important;
    background-position: center center !important;
    background-repeat: no-repeat !important;
    background-attachment: fixed !important;
}

html:not(.skin-theme-clientpref-night) body,
html:not(.skin-theme-clientpref-night) #content,
html:not(.skin-theme-clientpref-night) .mw-body,
html:not(.skin-theme-clientpref-night) .citizen-body,
html:not(.skin-theme-clientpref-night) .citizen-body-container {
    background-color: transparent !important;
    background-image: none !important;
}

/* 暗色模式：覆盖 html + body + 内容层 */
html.skin-theme-clientpref-night {
    background-color: #0d0e12 !important;
    background-image: url('/images/f/fc/Dark.jpg') !important;
    background-size: cover !important;
    background-position: center center !important;
    background-repeat: no-repeat !important;
    background-attachment: fixed !important;
}

html.skin-theme-clientpref-night body,
html.skin-theme-clientpref-night #content,
html.skin-theme-clientpf-night .mw-body,
html.skin-theme-clientpref-night .citizen-body,
html.skin-theme-clientpref-night .citizen-body-container {
    background-color: transparent !important;
    background-image: none !important;
}

/* 超宽屏 */
@media screen and (min-width: 1921px) {
    html {
        background-size: cover !important;
    }
}

/* 竖屏手机 */
@media screen and (max-width: 768px) and (orientation: portrait) {
    html {
        background-attachment: scroll !important;
        background-position: center center !important;
        background-size: cover !important;
    }
}

/* 横屏手机/平板 */
@media screen and (max-width: 1024px) and (orientation: landscape) {
    html {
        background-position: center center !important;
        background-size: cover !important;
    }
}

/* 低性能设备 */
@media (prefers-reduced-motion: reduce) {
    html {
        background-attachment: scroll !important;
    }
}