白月光脚”指的是一种在网络文学和影视作品中，为主角提供情感寄托、推动剧情发展并为演员带来商业价值的“白月光”角色, 其“function”（功能/作用）体现在制作、宣发及演员赋能等多个方面。 这个概念来源于张爱玲小说中的“白月光”意象，用以比喻那些可望而不可即的完美存在，常被用来形容初恋或理想的爱人。
"White Moonlight" refers to a "white moonlight" character in online literature
and film and television works that provides emotional sustenance to the protagonist,
promotes plot development, and brings commercial value to the actors.Its "function"
(function/function) is reflected in many aspects such as production, promotion,and
actor empowerment.This concept comes from the "white moonlight" image in Zhang Ailing's
novels,which is used to metaphor those perfect existences that are elusive and
unattainable,and is often used to describe first love or ideal lover.
