如何使用透明背景添加内部边框到bootstrap 3 nav-tabs？

Question

我无法弄清楚如何隐藏.tab-pane的重叠边框。我尝试剪裁但它仍然可见。

有没有人知道任何可以隐藏底部边框的jQuery插件？

请在底部看小提琴。

HTML

<section id="content" class="container">
<div class="row">
    <div class="tab-forms col-md-12">
        <!-- Nav tabs -->
        <ul class="nav nav-tabs pull-right" role="tablist">
            <li role="presentation" class="active">
                <a href="#home" aria-controls="home" role="tab"
                                                      data-toggle="tab">SIGN UP</a></li>
            <li role="presentation"><a href="#profile" aria-controls="profile" role="tab" data-toggle="tab">SIGN
                IN</a>
            </li>
        </ul>
        <div class="clearfix"></div>
        <!-- Tab panes -->
        <div class="tab-content">
            <div role="tabpanel" class="tab-pane active" id="home">
                <div class="form-border">

                </div>
            </div>
            <div role="tabpanel" class="tab-pane" id="profile">
                <div class="form-border">

                </div>
            </div>
        </div>
    </div>
</div>
</section>

CSS

body {
  background: #155C91;
  -webkit-background-size: cover;
  -moz-background-size: cover;
  -o-background-size: cover;
  background-size: cover;
  padding-top: 88px;
  padding-bottom: 20px;
}
.tab-forms .nav-tabs {
  border-bottom: 0;
}
.tab-forms .nav-tabs li.active a {
  background: rgba(255, 255, 255, 0.2);
  border: 1px solid rgba(255, 255, 255, 0);
  border-bottom: 0;
  margin-bottom: 1px;
  -webkit-clip-path: polygon(0px 0px, 144px 0px, 144px 81px, 0px 81px);
  /*Chrome,Safari*/
  /*Firefox*/
}
.tab-forms .nav-tabs li.active a:before {
  content: "";
  width: 90%;
  height: 55px;
  top: 8px;
  left: 5%;
  position: absolute;
  border: 1px solid #fff;
}
.tab-forms .nav-tabs li.active a:after {
  border-bottom: 1px solid #fff;
  content: "";
  width: 127px;
  height: 55px;
  top: 8px;
  left: 7px;
  position: absolute;
}
.tab-forms .nav-tabs li a {
  margin-right: 0;
  -webkit-border-radius: 0;
  -moz-border-radius: 0;
  border-radius: 0;
  background: rgba(255, 255, 255, 0.1);
  width: 144px;
  text-align: center;
  font-size: 18pt;
}
.tab-forms .nav-tabs li a:before {
  content: "";
  width: 80%;
  height: 25px;
  top: 8px;
  left: 11%;
  position: absolute;
  border: 1px solid #fff;
}
.tab-forms .tab-content {
  padding: 8px;
  min-height: 100px;
  background: rgba(255, 255, 255, 0.2);
}
.tab-forms .tab-content .tab-pane {
  border: 1px solid #ffff00;
  min-height: 100px;
}
rect {
  fill: red;
}

http://jsfiddle.net/52VtD/12901/

https://jsfiddle.net/52VtD/12908/

Answer 1

从border-bottom移除.tab-forms .nav-tabs li.active a:after属性并为border-bottom:none;

设置.tab-forms .nav-tabs li.active a:before