一個是包裹全部的div，一個是包裹表單的div、一個是logo的div標簽，一共三個

<div class="bg-div">

? <div class="search-box">

? <div class="logo"></div>

?

<form class="search-form" action="https://cn.bing.com/search" target="_blank" id="search-form">

<input type="text" class="search-text" name="q" id="search_input" autocomplete="off"/>

<input type="submit" class="search-button" value=""/>

</form>

? </div>

?</div>

?<div class="suggest" id="search-suggest" style="display:none">

<ul id="search-result">

<li> 搜索內容 </li>

<li> 搜索內容 </li>

</ul>

</div>