样式调整代码强制换行

template/styl/mixins/markdown.styl

@@ -90,12 +90,19 @@ div.markdown-body
     ul ul ol, ul ol ol, ol ul ol, ol ol ol
         list-style-type lower-alpha
     pre
-        padding 1em
-        overflow auto
+        overflow: auto
+        padding: 1em
+        margin-top: 1.5em
+        margin-bottom: 1.5em
+        line-height: 1.3
+        word-break: break-all
+        word-wrap: break-word
+        color: rgb(51, 51, 51)
+        border: none
+        max-height: 35em
+        position: relative
         background-color #f7f7f9
         border-radius 3px
-        word-break break-all
-        word-wrap break-word 
         font "Source Code Pro", Consolas, Menlo, Monaco, "Courier New", monospace
         font-size 0.93em
         -webkit-overflow-scrolling touch
@@ -105,6 +112,11 @@ div.markdown-body
             line-height 1.4
             display block
             font-size 1em
+            box-sizing: border-box
+            border-radius: 0px
+            white-space: inherit
+            overflow-wrap: normal
+            word-wrap:normal!important
         // code:before,code:after,tt:before,tt:after
         //     letter-spacing 0
         //     content ""