优化分割线样式

src/part/line.md

@@ -1,2 +1,2 @@
 <div style="height: 40px;width: 100%;display: flex;justify-content: space-between;align-items: center;"><span style="height: 0px; border-style: ridge;border-width: 1px; flex-grow:1;margin-right: 0.5em;"></span><span style="color:#808080c0;">
-</span><span style="height: 0px; border-style: ridge;border-width: 1px; flex-grow:1;margin-left: 0.5em;"></span></div>
+<a href="#">返回顶部</a></span><span style="height: 0px; border-style: ridge;border-width: 1px; flex-grow:1;margin-left: 0.5em;"></span></div>

src/part/markdown_guide.md

@@ -75,6 +75,12 @@
 
 ## 高级分割线
 
+```
+\{{#include ../part/line.md}}
+```
+{{#include ../part/line.md}}
+
+
 ```
 \{{#include ../part/line.md:1}}
 我是分割线