สอบถามเรื่อง css เส้น border div นอกสุด ไม่คลุมเนื้อหา ไม่คลุม div ข้างใน ช่วยด้วยนะ TT

<style type="text/css">
.vdo a{
font-size:13px;
line-height:18px;
}
</style>


<div style="width:960px; border:1px solid #000;">
<div style="width:700px; float:left">
<span>
Enterprises of all sizes depend on Avaya for unified communications solutions and technology that improve efficiency, collaboration, customer service―and ultimately competitiveness. Unified Communications simplify the proliferation of technologies that businesses deal with every day. Our people-centric solutions integrate voice, video and data, enabling users to communicate and collaborate in real time, in the mode best suited to each interaction. This eliminates inefficiencies in communications to make organizations more productive and responsive. <br /><br />
Avaya also offers an open software platform for quickly developing multi-vendor Unified Communications and Communications Enabled Business Process (CEBP) applications. Avaya provides solutions and supporting services directly and through its channel partners.
</span>

</div>

<div style="width:250px; float:left; position:relative" class="vdo">
<a href="http://www.avaya.com/usa/VideoPlayerInLine.aspx?CurrentPath=/master-usa/en-us/resource/assets/videos/avaya_aura_capabilities.xml&htmltrigger=video-overlay">
<img src="images/avayaOverview_vdo.jpg"><br />
7 Reasons to Upgrade to Avaya <br />Aura® Now
</a>
</div>
 <div style="clear:both"></div>
</div>

<style type="text/css">
.vdo a{
font-size:13px;
line-height:18px;
}
</style>
<div style="width:960px; border:1px solid #000;">
  <div style="width:700px;"> <span> Enterprises of all sizes depend on Avaya for unified communications solutions and technology that improve efficiency, collaboration, customer service―and ultimately competitiveness. Unified Communications simplify the proliferation of technologies that businesses deal with every day. Our people-centric solutions integrate voice, video and data, enabling users to communicate and collaborate in real time, in the mode best suited to each interaction. This eliminates inefficiencies in communications to make organizations more productive and responsive. <br />
    <br />
    Avaya also offers an open software platform for quickly developing multi-vendor Unified Communications and Communications Enabled Business Process (CEBP) applications. Avaya provides solutions and supporting services directly and through its channel partners. </span> </div>
  <div style="width:250px;"> <a href="http://www.avaya.com/usa/VideoPlayerInLine.aspx?CurrentPath=/master-usa/en-us/resource/assets/videos/avaya_aura_capabilities.xml&htmltrigger=video-overlay"> <img src="images/avayaOverview_vdo.jpg"><br />
    7 Reasons to Upgrade to Avaya <br />
    Aura® Now </a> </div>
</div>