查看“︁MediaWiki:Common.css”︁的源代码

/* 这里放置的CSS将应用于所有皮肤 */
/* 隐藏“讨论”选项卡 */
#ca-talk { display: none !important; }

/*启用可折叠的浮动目录树 开始*/
#toc{
    display: block;
    position: fixed;
    top: 100px;
    right: 0px;
    min-width: 100px;
    max-width: 350px;
    max-height: 500px;
    overflow-y: scroll;
    border: 1px solid #aaa;
    border-radius: 0 0 1px 1px;
    -moz-border-radius: 0 0 1px 1px;
    background: rgba(249,249,249,0.75);
    padding: 12px;
    box-shadow: 0 1px 8px #000;
    -webkit-box-shadow: 0 1px 8px #000;
    -moz-box-shadow: 0 1px 8px #000;
    z-index: 999;
    }
#toc:hover{
    display: block;
    position: fixed;
    top: 100px;
    right: 0px;
    min-width: 100px;
    max-width: 350px;
    max-height: 500px;
    overflow-y: scroll;
    border: 1px solid #aaa;
    border-radius: 0 0 1px 1px;
    -moz-border-radius: 0 0 1px 1px;
    background: rgba(249,249,249,0.75);
    padding: 12px;
    box-shadow: 0 1px 8px #000;
    -webkit-box-shadow: 0 1px 8px #000;
    -moz-box-shadow: 0 1px 8px #000;
    z-index: 999;
    }
body { overflow-x: hidden;}
/*启用可折叠的浮动目录树 结束*/