屬性（CSS）
CSS 屬性是指一種特性（例如顏色），其關聯值定義了瀏覽器如何顯示元素的一個方面。
以下是 CSS 規則的示例
css
/* "div" is a selector indicating that all the div elements */
/* in the document will be styled by that rule */
div {
/* The property "color" with the value "black" indicates */
/* that the text will have the color black */
color: black;
/* The property "background-color" with the value "white" indicates */
/* that the background color of the elements will be white */
background-color: white;
}