                        课程
                    
                        /前端开发
                        
                            /JavaScript
                        
                        /搜索框制作

设置完绝对定位后logo跑到搜索框上面去了，这是为毛？

<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>bing search</title>
<style>
  body{
   background:#333;
  }
  .bg{
   background:url(image/river.jpg);
   width:1366px;
   height:768px;
   margin:0 auto;

  }
  .logo{
   background:url(image/logo.png);
   width:107px;
   height:53px;
   margin:-4px 18px 0 0;
   float:left;

  }
  .search-input-text{
   border:0;
   float:left;
   height:27px;
   width:350px;
   line-height:27px;
   outline:none;
  }
  .search-input-button{
   border:0;/*去掉边框的颜色*/
   background:url(image/search-button.png);
   width:29px;
   height:29px;
   float:left;

  }

  .form{
   float:left;
   padding:5px;
   background-color:#fff;
  }

  .search-box{
   position:absolute;
   top:100px;
   left:100px;

}

</style>
</head>
<body>
  <div>
   <div>
    <div></div>
     <form>
      <input type"text"/>
      <input type="submit" value=""/>
     </form>
   </div>

</div>
</body>
</html>