如何用纯 CSS 创建带有虚线的票证形状?

How can I create a ticket shape with dotted line with pure CSS?

我想用纯 css 创建一个票证形状(4 个角用圆圈剪裁),但是我在尝试为其添加边框时遇到了一些困难。我试图处理 box-shadow 但我失败了。我试图用两种风格来制作它- 1. 我可以为包括圆角在内的整个形状设置 3px 边框 2. 我可以为整个形状设置一个 3px 的边框,但采用虚线样式

因为我对box-shadow不是很熟悉,很难实现我想要的风格。谁能给我一些提示吗?太感谢了。

.ticket {
    font-family: Arial;
    font-size: 12px;
    font-weight: bold;
    position: relative !important;
    background: #4a4a4a;
    float: left;
    padding: 35px 30px;
    margin: 0 50px 50px 0;

}
.ticket:after {
    content: "";
    position: absolute !important;
    z-index: 100;
    top:0;
    left: 0;
    border-right: #fff 7px solid;
    border-bottom: #fff 7px solid;
    -moz-border-radius: 0 0 20px 0;
    -webkit-border-radius: 0 0 20px 0;
    border-radius: 0 0 20px 0;
  background-color: white;
  
}
 
.ticket:before {
    content: "";
    position: absolute !important;
    z-index: 100;
    top: 0;
    right: 0;
    border-left: #fff 7px solid;
    border-bottom: #fff 7px solid;
    -moz-border-radius: 0 0 0 20px;
    -webkit-border-radius: 0 0 0 20px;
    border-radius: 0 0 0 20px;

}
.ticket a {
    padding: 35px 35px 35px 20px;
    text-decoration: none;
    color: #fff;
    white-space: nowrap;
}
 
.ticket a:hover {color: rgba(0,0,0,0.5);}
.ticket a:after {
    content: "";
    position: absolute !important;
    z-index: 100;
    bottom: 0;
    left: 0;
    border-right: #fff 7px solid;
    border-top: #fff 7px solid;
    -moz-border-radius: 0 20px 0 0;
    -webkit-border-radius: 0 20px 0 0;
    border-radius: 0 20px 0 0;
}
 
.ticket a:before {
    content: "";
    position: absolute !important;
    z-index: 1000;
    bottom: 0;
    right: 0;
    border-left: #fff 7px solid;
    border-top: #fff 7px solid;
    -moz-border-radius: 20px 0 0 0;
    -webkit-border-radius: 20px 0 0 0;
    border-radius: 20px 0 0 0;
}
<div class="ticket"><a href="#">Box A</a></div>
<div class="ticket"><a href="#">Box B</a></div>
<div class="ticket"><a href="#">Box C</a></div>
<div class="ticket"><a href="#">Box D</a></div>

这里有一个想法,您还可以在伪元素上使用虚线边框,同时隐藏主元素的一些边框:

.ticket {
  font-size: 20px;
  position: relative;
  background: #4a4a4a;
  float: left;
  padding: 35px 30px;
  margin:20px;
  border:4px dotted #fff;
}

.ticket:after,
.ticket:before,
.ticket a:after,
.ticket a:before {
    content: "";
    position: absolute;
    z-index: 1;
    width: 15px;
    height: 15px;
    background: 
      linear-gradient(#fff,#fff) padding-box,
      #4a4a4a;
}
.ticket:after {
  top: -5px;
  left: -5px;
  border-right: #fff 5px dotted;
  border-bottom: #fff 5px dotted;
  border-radius: 0 0 20px 0;
}

.ticket:before {
  top: -5px;
  right: -5px;
  border-left: #fff 5px dotted;
  border-bottom: #fff 5px dotted;
  border-radius: 0 0 0 20px;
}

.ticket a {
  padding: 35px;
  text-decoration: none;
  color: #fff;
}

.ticket a:after {
  bottom: -5px;
  left: -5px;
  border-right: #fff 5px dotted;
  border-top: #fff 5px dotted;
  border-radius: 0 20px 0 0;
}

.ticket a:before {
  bottom: -5px;
  right: -5px;
  border-left: #fff 5px dotted;
  border-top: #fff 5px dotted;
  border-radius: 20px 0 0 0;
}
<div class="ticket"><a href="#">Box A</a></div>