使用 IE11 服务器 - 圆角边框不显示?

Using IE11 server - Rounded borders not showing?

我正在创建一个位于另一个网页(如内部网)内的网页,该文档位于我们运行 Internet Explorer 11 的服务器上并从中运行。谁能告诉我为什么某些设计元素没有出现? (尤其是曲线)

JS Fiddle: https://jsfiddle.net/kt4hs1pk/

我把它放在开头,它与我想要的最相似:

<!--[if IE]>
<script src="http://html5shiv.googlecode.com/svn/trunk/html5.js"></script>
<![endif]-->
<meta http-equiv="X-UA-Compatible" content="IE=9; IE=8; IE=7; IE=11; IE=6" />

html

<div id="content">
<section id="mainContent">
<h2> Header </h2>
<div class="boxed">
<h3>time and date</h3>
<h4> <img src=" alt=""; style="float:left; padding-right:1%; padding-left:1%"/>main content.</h4>
<br>
<footer>
  <article>
    <h5><div style="color:black; background-color:#B9D4F4">Links</div></h5>
    <p>footer text <br>
      <br>
     footer text </p>
    </article>
    </footer>
</div>
  <div id="footerbar"><!-- Small footerbar at the bottom --></div>
  </div>

</section>

css

@charset "utf-8";
#content #mainContent h2 {
    /* Blog Header */

    background-color:#fff;
    width:auto;
    text-indent:3%;
    text-decoration:none;
    font:antic;
    font-weight:100;


}
#content #mainContent h3 {
    /*Date and Name */
    margin-left:10px;
    font:antic;
    width:auto;
    font-size:14px;
    font-weight:100;
    color: #D6D6D6;


}
#content #mainContent h4 {
    /* All paragraphs under maincontent */
    margin-left:10px;
    font:antic;
    font-weight:100;
    color:#195DAD


}

footer article  {
    /* Footer articles */
    width: 100%;
    float: left;
    padding-left: 2%;
    padding-top: 1%;
    padding-right: 2%;
    text-align: center;
    font-family: antic;
    font-style: normal;
    font-weight: 200;
    color: rgba(146,146,146,1.00);
    font-size:14px

}
footer article h5  {
    /* Footer article titles */
    text-align: center;
    font-family: antic;
    font-style: normal;
    font-weight: 400;
    font-size:16px;
    width:10%;
    margin-left:auto;
    margin-right:auto;
    border-radius:20px 20px 20px 20px;
    border-style:dotted;

}
#mainContent {
    /* Container for the blog post in individal blog view */
    padding-left: 2%;
    width: auto;
    float: left;
    padding-right: 2%;
    padding-top: 41px;
    margin-left:150px;
    max-width:60%;
    border-style: groove;
    border-top-style:none;
    border-color: #C6D9EF;
    border-width:1px;
    border-radius: 8px;
    }

#mainwrapper {
    /* Container of all content */
    width: 70%;
    overflow: auto;
    margin-left: 5%;

}

#footerbar {
    /* Footer bar at the bottom of the page */
    height: 18px;
    clear: both;
    background-color: rgba(185,212,244,1.00);
    width: 100%;

}
footer {
    /* Container for footer artices */
    width: 100%;
    padding-left: 2%;
    padding-right: 2%;
}





#mainContent {
    /* Container for the blog post */
    padding-top: 0px;
    float: none;
    width: 96%;
}


footer {
    /* Footer region */
    width: 96%;
    padding-left: 2%;
    padding-right: 2%;
}
#content footer article {
    /*Each footer article */
    width: 100%;
}
#mainwrapper header {
    /* Header */
    width: 100%;
}

#mainwrapper header nav {
    /*navigation links in header */
    text-align: center;
    background-color: #195DAD;
    width: 98%;
}


#mainwrapper #content #sidebar {
    /* sidebar */
    padding-bottom: 0px;
}


#content footer article {
    /* Each foter article */
    width: 96%;
}

有人能帮忙吗?

事实证明,该网站将在 iframe 中播放。我想出了替代方案。