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CallCenterWeb.UI/css/login.css

     	width: 100%;
 	}
 	div.left_word_bj {
-    	width: 102%;
+    	width: 100%;
     	z-index: 0;
 	}
 	div.signin_left{
     	width: 100%;
 	}
 	div.left_word_bj {
-    	width: 102%;
+    	width: 100%;
 	}
 	div.signin_bg_mask {
     	width: 100%;

CallCenterWeb.UI/login.html

     	}
     	.left_word_bj{
     		position: absolute;
+    		left: 0;
+    		top:0;
     		height: 100%;
-    		width: 51%;
+    		width: 50%;
     		background: #2a303c;
   			filter:alpha(opacity=75);  
       		-moz-opacity:0.75;  
     <div class="signin_bg row">
         <div class="signin_bg_left col-md-5"></div>
         <div class="signin_bg_mask col-md-5"></div>
-        	<div class="left_word_bj"></div>
+        	<div class="left_word_bj col-md-5"></div>
            	<div class="left_word">
 	           	<div class="left_text">
 	           		<div class="logo"><img src="img/logo.png"><span>医院随访系统平台</span></div>