How can CSS be used to incorporate custom fonts on a website without the need for file copying?

To incorporate custom fonts on a website without the need for file copying, you can use the `@font-face` rule in CSS to specify the font files hosted on a remote server. This allows you to use custom fonts without having to physically copy the font files to your website's server. ```html <style> @font-face { font-family: 'CustomFont'; src: url('https://example.com/customfont.woff') format('woff'); } body { font-family: 'CustomFont', sans-serif; } </style> ```