“彩蛋” (cǎidàn), or "Easter egg," refers to hidden messages, features, or inside jokes embedded within various forms of media, such as video games, movies, or websites. These surprises are often meant to be discovered by attentive users and can enhance the overall experience by adding layers of meaning or humor. In the context of video games, 彩蛋 can include secret levels, character references, or unexpected interactions. In movies, they might appear as brief cameos or nods to other films. The concept encourages exploration and engagement, rewarding those who take the time to look deeper into the content.