diff --git a/chapters/13-analytics-02.md b/chapters/13-analytics-02.md
index 378e1c8..52fb618 100644
--- a/chapters/13-analytics-02.md
+++ b/chapters/13-analytics-02.md
@@ -517,5 +517,3 @@ def get_points(usernames):
 ```
 
 真看不出来两者有什么相似的地方 。。。。  
-
- <hr>
\ No newline at end of file
diff --git a/github-roam.md b/github-roam.md
index 292f236..a8ecc44 100644
--- a/github-roam.md
+++ b/github-roam.md
@@ -2884,5 +2884,3 @@ def get_points(usernames):
 ```
 
 真看不出来两者有什么相似的地方 。。。。  
-
- <hr>
diff --git a/index.html b/index.html
index 96b3f1a..41de2bc 100644
--- a/index.html
+++ b/index.html
@@ -2505,7 +2505,6 @@ pipe.execute()</code></pre></div>
     0.          0.          0.          0.          0.          0.          0.
     0.          0.          0.          0.        ]</code></pre>
 <p>真看不出来两者有什么相似的地方 。。。。</p>
-<hr>
 <section class="footnotes">
 <hr />
 <ol>
diff --git a/style.css b/style.css
index be29187..1332a5d 100644
--- a/style.css
+++ b/style.css
@@ -32,6 +32,7 @@ a img {
 }
 
 p {
+    text-indent: 2em;
     margin-bottom: 12px;
 }