diff --git a/public/css/theme/presentation.css b/public/css/theme/presentation.css
index 1671f62e..9030582d 100644
--- a/public/css/theme/presentation.css
+++ b/public/css/theme/presentation.css
@@ -32,11 +32,14 @@ body {
   padding: 0 150px;
 }
 .pren-content {
-  padding: 0 150px;
+  margin: 0 150px;
+  overflow: hidden;
+  word-wrap: break-word;
 }
 .pren-content * {
   font-size: 18px;
-  line-height: 1.2;
+  line-height: 1.5;
+  max-width: 100%;
 }
 .pren-content p {
   margin: 10px 0;
diff --git a/public/css/theme/presentation.less b/public/css/theme/presentation.less
index c84b8a73..d2f03b4f 100644
--- a/public/css/theme/presentation.less
+++ b/public/css/theme/presentation.less
@@ -37,10 +37,13 @@ body {
  	padding: 0 150px;
 }
 .pren-content {
- 	padding: 0 150px;
+ 	margin: 0 150px;
+ 	overflow: hidden;
+	word-wrap: break-word;
  	* {
 	  font-size: 18px;
-	  line-height: 1.2;
+	  line-height: 1.5;
+	  max-width: 100%; // 有些html有宽度, 就会超出
 	}
 	p {
 		margin: 10px 0;