How to use CSS styles to beautify web pages

CSS (Cascading Style Sheets) is a markup language used to control the layout and design of web pages. Since it was first released in 1996, CSS has become one of the foundations of web design. Here, we will introduce how to use CSS styles to beautify web pages.

1. Inline style sheets

Inline style sheets are the way in which CSS style sheets are written in HTML tags. For example:

<p>这是一段红色的文字</p>

This will display the text on the page, "This is a piece of text in red" and set that text to red. You can set various CSS styles in labels, such as font size, text style, background color, etc.

The advantage of inline style sheets is that they are simple and easy to implement, but the disadvantage is that when writing a large amount of HTML code, it will make your code too verbose and confusing.

2. Embedded style sheet

Embedded style sheet is a <style></style> tag that writes a CSS style sheet at the head of an HTML document in:

  <style>
    p {
      color: red;
    }
  </style>

This will set the text color to red for all <p></p> tags in this HTML document. In a style sheet, you can define various CSS styles, including font, width, height, margins, padding, and more.

The advantage of embedded style sheets is that multiple CSS rules can be put together, making it easier to modify CSS styles. But in large projects, the disadvantage is that maintenance is relatively difficult.

3. External style sheet

Another way to write CSS styles is to create an external style sheet and then link it into the HTML document. First, you need to create a text file, save it as a .css file, for example:

/* styles.css */

p {
  color: red;
}

Next, you need the tag:

  <link>

This will introduce an external style sheet named styles.css into the HTML document, which contains CSS rules that set the text color to red .

The advantage of using an external style sheet is that the CSS style can be maintained separately from the HTML document, which is more effective in large projects. But the disadvantage is that if the CSS file is deleted or moved on the server, all HTML files linked to it will have problems.

In general, no matter which CSS style sheet setting method you use, you should be careful. Your goals should be to make your code easy to maintain and modify, and to ensure that your pages look beautiful and consistent.

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