请问一个CSS的有关问题,文字无法在某个DIV内显示

请教一个CSS的问题,文字无法在某个DIV内显示
CSS code
div
    {
overflow:hidden;
word-wrap:break-word;



border:2px solid green;
     }
    .total
    {
width:1000px;
height:1000px;



    
    }
    
    .header
    {
height:20%;
    
     }
     
     .header_1
     {
     
     height:30%;
    
      }
      
      
      .header_1 div div
      {
      width:100%;
      height:50%;
      
       }
       
       .header_1 div div div
       
       { 
       width:50%;
       height:100%;
       text-align:center;
       
       
       }
      
      .header_1 div
      
      {
      
      width:19%;
      height:100%;
      float:left;
      
     
      
       }
      .header_2
      
      {
      height:30%;
      
       }
       
       .header_3
       
       { 
       
       height:30%;
       
       }
       
    .header,.header_1,.header_2,.header_3
    { 
width:inherit;
    
    }
    
    .header_2 div,.header_3 div
    
    {
    width:32%;
    height:100%;
float:left;

overflow:auto;
    
    
     }


HTML code
<body>
  <div class="total">
      
      <div class="header">
        <div class="header_1">
           <div>
           
              <div>
              <div>
              
              I have a div tag, and the text wraps well when you have spaces, everything is good, but when I do a long word or something, it will stick outside the div, is there anyway to fix this. I've looked at several things but they aren't all compatible with all browsers.
Right now this is my css that the text is going into: 
              
              </div>
              <div>
              
dddddddddddddddddddddddd 
              
              </div>  
              
              </div>
                 <div>
              
              <div>
              
              I have a div tag, and the text wraps well when you have spaces, everything is good, but when I do a long word or something, it will stick outside the div, is there anyway to fix this. I've looked at several things but they aren't all compatible with all browsers.
Right now this is my css that the text is going into: 
              
              </div>
              <div>
              
              I have a div tag, and the text wraps well when you have spaces, everything is good, but when I do a long word or something, it will stick outside the div, is there anyway to fix this. I've looked at several things but they aren't all compatible with all browsers.
Right now this is my css that the text is going into: 
              
              
              </div>
              </div>
           
           
           </div>
           <div>I have a div tag, and the text wraps well when you have spaces, everything is good, but when I do a long word or something, it will stick outside the div, is there anyway to fix this. I've looked at several things but they aren't all compatible with all browsers.
Right now this is my css that the text is going into: 2</div>
           <div>I have a div tag, and the text wraps well when you have spaces, everything is good, but when I do a long word or something, it will stick outside the div, is there anyway to fix this. I've looked at several things but they aren't all compatible with all browsers.
Right now this is my css that the text is going into: 3</div>
           <div>I have a div tag, and the text wraps well when you have spaces, everything is good, but when I do a long word or something, it will stick outside the div, is there anyway to fix this. I've looked at several things but they aren't all compatible with all browsers.
Right now this is my css that the text is going into: 4</div>
           <div>I have a div tag, and the text wraps well when you have spaces, everything is good, but when I do a long word or something, it will stick outside the div, is there anyway to fix this. I've looked at several things but they aren't all compatible with all browsers.
Right now this is my css that the text is going into: 5</div>
        
        </div>
        
        
              <div>
        <div class="header_2">
             <div>I have a div tag, and the text wraps well when you have spaces, everything is good, but when I do a long word or something, it will stick outside the div, is there anyway to fix this. I've looked at several things but they aren't all compatible with all browsers.
Right now this is my css that the text is going into: 1</div>
             <div>I have a div tag, and the text wraps well when you have spaces, everything is good, but when I do a long word or something, it will stick outside the div, is there anyway to fix this. I've looked at several things but they aren't all compatible with all browsers.
Right now this is my css that the text is going into: 2</div>
             <div>I have a div tag, and the text wraps well when you have spaces, everything is good, but when I do a long word or something, it will stick outside the div, is there anyway to fix this. I've looked at several things but they aren't all compatible with all browsers.
Right now this is my css that the text is going into: 3</div>
        
        </div>
        
        <div class="header_3">
             <div>I have a div tag, and the text wraps well when you have spaces, everything is good, but when I do a long word or something, it will stick outside the div, is there anyway to fix this. I've looked at several things but they aren't all compatible with all browsers.
Right now this is my css that the text is going into: 1</div>
             <div>I have a div tag, and the text wraps well when you have spaces, everything is good, but when I do a long word or something, it will stick outside the div, is there anyway to fix this. I've looked at several things but they aren't all compatible with all browsers.
Right now this is my css that the text is going into: 2</div>
             <div>I have a div tag, and the text wraps well when you have spaces, everything is good, but when I do a long word or something, it will stick outside the div, is there anyway to fix this. I've looked at several things but they aren't all compatible with all browsers.
Right now this is my css that the text is going into: 3</div>
        
        </div>
        
             </div>
        
      </div>
     
     
     </div>
  
  
  </div>
  
  
  
  </body>