导航栏中的响应式搜索框（bootstrap 3.0）

Question

我只是想让我的搜索框响应。这是我已有的代码。

 <div class = "container">
 <div class = "navbar navbar-inverse">
    <a class = "navbar-brand ">Search: </a>
    <form class="navbar-form" role="search">
      <div class="form-group">
        <input type="text" class="form-control" placeholder="Search" style="width: 955px;" >
      </div>
      <button type="submit" class="btn btn-default">Submit</button>
    </form>
  </div>
</div>