pre, code style fix
diff --git a/public/css/all-web.css b/public/css/all-web.css
index b27a7da..8673c1f 100644
--- a/public/css/all-web.css
+++ b/public/css/all-web.css
@@ -1830,7 +1830,7 @@
 }
 
 
-pre {
+.markdwon pre {
     background-color: #F5F5F5;
     border: 1px solid rgba(0, 0, 0, 0.15);
     border-radius: 4px 4px 4px 4px;
@@ -1843,7 +1843,7 @@
     word-wrap: break-word;
 }
 
-code, pre {
+.markdown code, .markdown pre {
     border-radius: 3px 3px 3px 3px;
     color: #333333;
     font-family: Menlo,Monaco,Consolas,"Courier New",monospace;