add

bi/base.css

@@ -873,6 +873,14 @@ li.CodeMirror-hint-active {
   overflow-x: hidden;
   overflow-y: hidden;
   white-space: nowrap;
+  -webkit-box-sizing: border-box;
+  /*Safari3.2+*/
+  -moz-box-sizing: border-box;
+  /*Firefox3.5+*/
+  -ms-box-sizing: border-box;
+  /*IE8*/
+  box-sizing: border-box;
+  /*W3C标准(IE9+，Safari5.1+,Chrome10.0+,Opera10.6+都符合box-sizing的w3c标准语法)*/
   word-break: break-word;
 }
 .bi-bubble {

docs/base.css

@@ -873,6 +873,14 @@ li.CodeMirror-hint-active {
   overflow-x: hidden;
   overflow-y: hidden;
   white-space: nowrap;
+  -webkit-box-sizing: border-box;
+  /*Safari3.2+*/
+  -moz-box-sizing: border-box;
+  /*Firefox3.5+*/
+  -ms-box-sizing: border-box;
+  /*IE8*/
+  box-sizing: border-box;
+  /*W3C标准(IE9+，Safari5.1+,Chrome10.0+,Opera10.6+都符合box-sizing的w3c标准语法)*/
   word-break: break-word;
 }
 .bi-bubble {

src/css/base/single/text.css

@@ -3,5 +3,13 @@
   overflow-x: hidden;
   overflow-y: hidden;
   white-space: nowrap;
+  -webkit-box-sizing: border-box;
+  /*Safari3.2+*/
+  -moz-box-sizing: border-box;
+  /*Firefox3.5+*/
+  -ms-box-sizing: border-box;
+  /*IE8*/
+  box-sizing: border-box;
+  /*W3C标准(IE9+，Safari5.1+,Chrome10.0+,Opera10.6+都符合box-sizing的w3c标准语法)*/
   word-break: break-word;
 }

src/less/base/single/text.less

@@ -1,6 +1,7 @@
 @import "../../bibase";
 
-.bi-text{
+.bi-text {
   .overflow-dot();
+  .box-sizing(border-box);
   word-break: break-word;
 }