bootstrap中给导航条中添加搜索，搜索栏和搜索框没有对齐

[judas_jia]

<div class="navbar">
<div class="navbar-inner">

<form class="navbar-from">
<input type="text" style="padding:0; margin:0" class="span2 search-query" id="fname" />
<button type="submit" class="btn">submit</button>
</form>
</div>
</div>