The key to responsive typography is to establish flexible rules to adapt to different devices. Use relative units such as rem or em to replace px, and use html { font-size: 62.5%; } to facilitate conversion; set key breakpoints (such as 768px and 1024px) to manually adjust the font size, line height and spacing; control the line height to 1.4~1.6 times of the font, and reasonably set the paragraph spacing; allow the user's viewport to zoom, avoid forced restrictions; maintain the default viewport settings and ensure that the minimum font is not less than 16px, thereby improving reading comfort under multiple devices.

Responsive typography is not simply about making the font bigger or smaller, but about ensuring that the text can be read clearly and comfortably on different devices. The key is to establish a flexible set of rules so that font size, line height and spacing can be adjusted naturally according to the screen size.

Use relative units instead of fixed pixels

Use rem or em to set the font size instead of px , so that the text size can change with the user's system settings or screen size changes. for example:

• The title can be 2rem
• Use 1rem in the text
• Small characters can be set to 0.875rem

With the skills of html { font-size: 62.5%; } , 1rem can be equal to 10px , which is convenient for conversion. This allows you to control the overall proportion more flexibly, especially when making adjustments in media queries.

Set appropriate breakpoints to adjust the layout

While the elastic unit can handle most of the changes, scaling alone may not be ideal for some screen sizes. You can set several key breakpoints (such as 768px and 1024px) to manually adjust the font size, line height, or paragraph spacing.

For example:

 @media (min-width: 768px) {
  body {
    font-size: 1.1rem;
  }
}

This is done to get better readability and visual balance in tablet or desktop browsers, rather than letting text "auto-scaling" to inappropriate states.

Control row height and paragraph spacing to improve readability

The text is too crowded and difficult to read, it is too loose and wastes space. Generally speaking:

• The line height is recommended to be 1.4 to 1.6 times the font size
• Adding a 1.5rem margin between paragraphs will be more comfortable

And these values ??can also be fine-tuned as the screen changes. For example, slightly compress the line height on the phone to free up more visual areas; and appropriately pull it on the large screen to improve the reading experience.

Don't ignore the impact of viewport scaling

Mobile users like to zoom the page with two fingers. If you force user-scalable=no or unreasonable viewport settings, it will affect how they read text. Maintaining the default viewport settings, or at least allowing users to enlarge the text, is a practice of respecting user habits.

In addition, be careful not to set font-size too small. The default text is at least 16px, which is a safer choice to avoid users being unable to see clearly.

Basically that's it. Responsive typography is not particularly complicated, but details are easily overlooked. As long as you grasp the aspects of unit selection, breakpoint adjustment and reading comfort, you can achieve good layout effects that are suitable for various equipment.

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