For AI agents: the complete documentation index is available at /next/llms.txt, the full documentation bundle is available at /next/llms-full.txt, and this page is available as Markdown at /next/api/css/at-rule.md.
Lynx
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      • Overview

      At-rules are CSS statements that instruct CSS how to behave. They begin with an at sign @, followed by an identifier and includes everything up to the next semicolon ;, or the next CSS block, whichever comes first.

      Here are the @rules supported by Lynx CSS, specified by their identifiers, each with a different syntax:

      At-rules

      @font-face
      @import
      @keyframes
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