Title: Understanding CSS in English

CSS is an essential technology in web development, used to style the look and behavior of websites. In this article, we will explore CSS in English, its syntax, properties, and usage. We will also discuss some of the most commonly used CSS commands and their effects.

CSS stands for Style Sheets and it is an擴展 of HTML, used to style the HTML content on a web page. It is a set of rules that specify how the HTML content should look and feel. CSS can be used in two ways: inline and external.

inline CSS is written directly on the HTML code, and it is applied to the entire page. external CSS is written in a separate file and is applied only to the elements on the page that require it.

In CSS, there are several types of selectors, including:

1. Element selectors: These select only the specific element on the page that needs to be styles.

2. Style selectors: These select all elements on the page that have a certain style applied to them.

3. ID selectors: These select only the specific element with an ID attribute.

4. Class selectors: These select all elements with a certain class attribute.

5. 屬性 selectors: These select all elements with a certain屬性， such as class, id, or style.

CSS properties are used to control the look and behavior of elements on the page. There are several types of properties, including:

1. Data properties: These properties are used to set the value of a data attribute on an element.

2. Value properties: These properties are used to set the value of an element's text, color, background, and other attributes.

3. Style properties: These properties are used to set the style of an element, such as its background, font-size, and font-family.

4. Gradient properties: These properties are used to createGradients on an element.

5. Shadow properties: These properties are used to create shadows on an element.

Some of the most commonly used CSS commands are:

1. Shadow: This command creates a shadow effect on an element.

2. Gradient: This command creates a gradient effect on an element.

3. background-color: This command sets the background color of an element.

By understanding CSS in English, we can create more beautiful and effective websites, with ease and confidence.