What different CSS styles are needed at different resolutions?

In recent years, with the popularization of electronic products and the Internet, the devices we use to browse the web have become more and more diverse, ranging from traditional desktops to laptops, tablets, mobile phones and other devices of different sizes and resolutions. screen, which brings many challenges to web design. In order to obtain a good browsing experience on various devices, we need to write different CSS styles for devices of different sizes and resolutions.

In the past, front-end developers rarely considered responsive design and mobile-first, but now these two concepts have become industry standards. The so-called responsive design means that the website can adaptively adjust the layout and display effect under different resolutions; while mobile-first means that when developing the website, priority is given to the browsing effect on smaller mobile devices.

So, what different CSS styles are needed at different resolutions? Here are some common scenarios.

1. Page width
   With different screen sizes, the display width of the page will also be different. On the PC side, we usually choose a larger width (such as 1000px), but on the mobile side, the width needs to be appropriately reduced to fit the smaller screen size. Therefore, we need to use @media query in CSS to distinguish different screen sizes and thus set different widths.
2. Font size and line spacing
   Under different resolutions, font size and line spacing also need to be adjusted appropriately. On mobile devices, we need to use larger fonts and line spacing to make it easier for users to read in small screens; on larger screens, we need to use smaller fonts and line spacing to save space and avoid over-occupancy screen space.
3. Picture Size and Dimensions
   Under different resolutions, the size and dimensions of pictures also need to be adjusted appropriately. In most cases, mobile devices require smaller images to reduce loading time and improve page loading speed; while larger screens require larger images to ensure image clarity and visual impact.
4. Showing and hiding elements
   On mobile devices, some elements may not need to be displayed, or may be displayed in other ways. For example, tables can be displayed by folding or sliding left and right to facilitate reading on a small screen; and some advertisements or other redundant or unnecessary content can be directly hidden or reduced on the mobile terminal to allow users to read more easily. Focus on text content.

In general, different CSS is required for different resolutions, but this is not a simple task. Front-end developers need to consider the needs of various screen sizes and resolutions and use flexible CSS writing skills to ensure that the website can adapt gracefully to various terminals.

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