我有一个这样的pdf文档：

\<div class=**"cs6C976429"** style="width:671px;height:18px;line-height:17px;margin-top:98px;margin-left:94px;position:absolute;text-align:left;vertical-align:top;"\>
\<nobr\>INFORMATIONBOLD\</nobr\>\</div\>

\<style type="text/css"\>
.cs85480F5E {color:#000000 !important;background-color:transparent !important;border-left-style: none !important;border-top-style: none !important;border-right-style: none !important;border-bottom-style: none !important;font-family:'Times New Roman' !important; font-size:13px !important; font-weight:normal !important; font-style:normal !important;  !important;}
.cs8B56BD64 {color:#000000 !important;background-color:transparent !important;border-left-style: none !important;border-top-style: none !important;border-right-style: none !important;border-bottom-style: none !important;font-family:'Times New Roman' !important; font-size:15px !important; font-weight:bold !important; font-style:normal !important;  !important;}
**.cs6C976429** {color:#000000 !important;background-color:transparent !important;border-left-style: none !important;border-top-style: none !important;border-right-style: none !important;border-bottom-style: none !important;font-family:'Times New Roman' !important; font-size:15px !important; **font-weight:bold** !important; font-style:normal !important; padding-left:2px !important;}
.cs354AAA62 {color:#808080 !important;background-color:transparent !important;border-left-style: none !important;border-top-style: none !important;border-right-style: none !important;border-bottom-style: none !important;font-family:'Times New Roman' !important; font-size:16px !important; font-weight:bold !important; font-style:normal !important; padding-left:2px !important;padding-right:2px !important;}
\</style\>

我必须通过 selenium 验证 INFORMATIONBOLD 是否为粗体样式，我使用 Xpath 选择器找到了该样式：

\//style\[@type='text/css'\]

我无法找到一种方法来验证之前使用 Selenium C# 的粗体样式的特定类