更改

body {position: relative}body:after {content: ""; opacity: 0.75; top: 0; left: 0; bottom: 0; right: 0; position: absolute; z-index: -1; background: url("<!--{$link|escape:'html'}-->"); background-size: contain; background-attachment: fixed; background-repeat: no-repeat; background-position: left top; opacity}#content, #mw-navigation, .skin-timeless #bodyContent {background: rgba(255, 255, 255, 0.68)}#mw-contentbody.skin-text timeless {backgroud: rgba(255, 255, 255, 0.8); opacity: 0.895}