diff --git a/blog/front-end-learn/css-product-2.md b/blog/front-end-learn/css-product-2.md
index d0da8cb8cdd0314bc1fcf692a46b60ec7b9cfacd..eb2b2088e3073e0772daf18c49b248d94afcaae2 100644
--- a/blog/front-end-learn/css-product-2.md
+++ b/blog/front-end-learn/css-product-2.md
@@ -188,4 +188,10 @@ font-size: 0;
 2. 行高
 3. 定位
 
-https://www.bilibili.com/video/BV1Kg411T7t9?p=187&spm_id_from=pageDriver
+常用类名
+
+```css
+prev
+next
+current/active
+```
\ No newline at end of file
diff --git a/doc/index.md b/doc/index.md
index d630c72b4c3036bcfa296dc455f6b39d65296801..fc5a2816dd1ba630062b88e9679a8bc3181dc881 100644
--- a/doc/index.md
+++ b/doc/index.md
@@ -35,3 +35,11 @@
 Logo：https://www.logoly.pro/
 
 docsify：https://docsify.js.org/
+
+学习资料：
+
+2022 黑马程序员 Java 学习路线图
+https://www.bilibili.com/read/cv9965357
+
+黑马程序员 MySQL 数据库入门到精通，从 mysql 安装到 mysql 高级
+https://www.bilibili.com/video/BV1Kr4y1i7ru