Updated in 2022.1
When you want to customize the appearance of Announcements, KB Articles
In this situation, you must precede each your custom style definition with a special parent selector specified for the style sheet in question. For example, use
#announcement for the Announcement style sheet. That parent selector ensures that your style definition applies only to the user content, not to the entire web page. All default style sheets contain those parent selectors.
See the parent selectors for different objects:
For Preview Pane:
For Knowledge Base Articles:
For Service Catalog Items:
To specify a style for a particular web page element, add the element's code after the selector. For example, to set the font for Announcement paragraphs
<p>, use the following code:
/* Paragraph */
font-family: Arial, Tahoma, Helvetica;
In the same way, you can specify styles for other elements: headings, lists, tables, etc.