Learn the CSS Box Model by Building a Rothko Painting

该篇文章为 freecodecamp Learn the CSS Box Model by Building a Rothko Painting 学习笔记

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CSS 盒子模型

CSS 盒子模型由盒子构成，盒子由内容（content）、内边距（padding）、边框（border）和外边距（margin）组成。