diff --git a/article/2020.md b/article/2020.md
index 9ce7853..21ec7f0 100644
--- a/article/2020.md
+++ b/article/2020.md
@@ -44,6 +44,7 @@
 3. [What is CSSOM](https://varvy.com/performance/cssom.html)
 4. [CSS3 Patterns Gallery（高级CSS渐变效果）](https://leaverou.github.io/css3patterns/)
 5. [我写CSS的常用套路(附demo的效果实现与源码）](https://zhuanlan.zhihu.com/p/107741668)
+6. [面试官：你可以用纯 CSS 判断鼠标进入的方向吗？](https://juejin.im/post/6844904143966978056)
 
 ## JavaScript
 1. [字节跳动面试官：请你实现一个大文件上传和断点续传](https://juejin.im/post/5dff8a26e51d4558105420ed)