diff --git a/03-CSS进阶/CSS开发积累.md b/03-CSS进阶/CSS开发积累.md
index 265e6b3..8191578 100644
--- a/03-CSS进阶/CSS开发积累.md
+++ b/03-CSS进阶/CSS开发积累.md
@@ -64,7 +64,7 @@ CSS的逗号一般写在()里。**不同属性值之间，用的是空格**，
 
 ### 2019-11-01
 
-价格中的羊角符号，有半角和全角之分：
+人民币价格中的羊角符号，有半角和全角之分：
 
 - ¥半角
 
@@ -130,3 +130,15 @@ CSS的逗号一般写在()里。**不同属性值之间，用的是空格**，
 - [html设置局部区域上下滚动，不显示滚动条](https://blog.csdn.net/weixin_42157001/article/details/90176510)
 
 
+### 2021-05-06-设置页面的宽高，撑满屏幕
+
+一般来说，我们在开发一个页面的时候，默认是希望这个页面的宽高能够撑满屏幕的。代码可以这样写：
+
+```css
+.app {
+	width: 100vw;
+	min-height: 100vh;
+}
+
+```
+
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