At W3Schools you will find complete CSS references of all properties and selectors with syntax, examples, browser support, and more. Well organized and easy to understand Web building tutorials with lots of examples of how to use HTML, CSS, JavaScript, SQL, Python, PHP, Bootstrap, Java, XML and more.

3 天之前 · What is CSS? Cascading Style Sheets (CSS) is a simple mechanism for adding style (e.g., fonts, colors, spacing) to Web documents. These pages contain information on how to learn and use CSS and on available software.

在 W3School，您将找到所有属性和选择器的完整 CSS 参考手册，包括语法、示例、浏览器支持等。

W3.CSS is a CSS framework for developing websites and web apps. It provides equality for all browsers (Chrome, Edge, Firefox, Safari, Opera) on all devices (Desktop, Laptop, Tablet, Mobile). W3.CSS is free, open source, and uses standard CSS only (no JavaScript).

What is CSS? CSS stands for Cascading Style Sheets; CSS describes how HTML elements are to be displayed on screen, paper, or in other media; CSS saves a lot of work. It can control the layout of multiple web pages all at once; External stylesheets are stored in CSS files

CSS Validation Service. Check Cascading Style Sheets (CSS) and (X)HTML documents with style sheets

直接在样式表中定义自定义 CSS 属性，无需运行任何 JavaScript。

With CSS, you can control the color, font, the size of text, the spacing between elements, how elements are positioned and laid out, what background images or background colors are to be used, different displays for different devices and screen sizes, and much more!

Well organized and easy to understand Web building tutorials with lots of examples of how to use HTML, CSS, JavaScript, SQL, Python, PHP, Bootstrap, Java, XML and more.

CSS 是由W3C的CSS工作组发布推荐和维护的. CSS 是编程入门人员的必修课，运用CSS样式可以让页面变得美观。 CSS语法由三部分构成：选择器、属性和值： selector {property: value} 使用CSS的优势. 内容与表现分离，有了CSS，网页的内容(XHTML)与表现就可以分开了。