查看“︁MediaWiki:Vector.css”︁的源代码

/* 这里放置的CSS将影响使用Vector皮肤的用户 */
/* keep nested list fonts from continually decreasing in size with each nesting */
#mw-panel .portal .body ul li {
	font-size: small !important;
}

/* Allow popup submenus to overflow the sidebar area */
#mw-panel .portal .body ul li {
	overflow: visible !important;
}



/* minor adjustments to the sidebar area for the Vector skin */
.menuSidebar ul div { 
        top: -1px !important; /* vertical offset of submenus */
}

.menuSidebar ul {
 width: 8em; /* width of main menu */
}