没有嵌套SPAN的纯CSS3图标

Question

我正在创建纯CSS3图标。我现在这样做的方式要求我在某些情况下有多级嵌套SPAN。

在大多数情况下，父SPAN用于图标的背景。然后我使用：before和：after之后插入更多元素。 如果我需要两个以上的附加元素，我需要将更多的SPAN放入父级，我也可以填充并插入：before和：after。

这种方法运行良好，但如果我可以消除看起来像这样的HTML，那就太好了：

<span class="btn"><span></span><span></span></span>

所以我想知道是否有更好的方法？ 以下是一些例子。

.softwareBtn {
  position: relative;
  width: 32px;
  height: 32px;
  -webkit-border-radius: 50%;
  -moz-border-radius: 50%;
  border-radius: 50%;
  background-image: linear-gradient(#908dbe, #5e5c84, #5e5c84, #908dbe);
  display: block;
}
.softwareBtn:before,
.softwareBtn span:nth-child(1):before,
.softwareBtn span:nth-child(1):after,
.softwareBtn span:nth-child(2):before,
.softwareBtn span:nth-child(2):after,
.softwareBtn span:nth-child(3):before,
.softwareBtn span:nth-child(3):after {
  content: '';
  position: absolute;
  display: block;
}
.softwareBtn:before {
  top: 7px;
  right: 7px;
  width: 7px;
  height: 7px;
  border: 4px solid black;
  -webkit-border-radius: 50%;
  -moz-border-radius: 50%;
  border-radius: 50%;
}
.softwareBtn span:nth-child(1):before,
.softwareBtn span:nth-child(2):before,
.softwareBtn span:nth-child(2):after {
  top: 4px;
  right: 13px;
  width: 3px;
  height: 15px;
  border: solid black;
  border-width: 3px 0 3px 0;
  -webkit-border-radius: 3px;
  -moz-border-radius: 3px;
  border-radius: 3px;
}
.softwareBtn span:nth-child(1):after {
  top: 13px;
  right: 4px;
  width: 15px;
  height: 3px;
  border: solid black;
  border-width: 0 3px 0 3px;
  -webkit-border-radius: 3px;
  -moz-border-radius: 3px;
  border-radius: 3px;
}
.softwareBtn span:nth-child(2):before {
  transform: rotate(45deg);
  -webkit-transform: rotate(45deg);
  -moz-transform: rotate(45deg);
  -o-transform: rotate(45deg);
  -ms-transform: rotate(45deg);
}
.softwareBtn span:nth-child(2):after {
  transform: rotate(-45deg);
  -webkit-transform: rotate(-45deg);
  -moz-transform: rotate(-45deg);
  -o-transform: rotate(-45deg);
  -ms-transform: rotate(-45deg);
}
.softwareBtn span:nth-child(3):before {
  bottom: 4px;
  left: 4px;
  width: 14px;
  height: 14px;
  border: 1px solid white;
  -webkit-border-radius: 50%;
  -moz-border-radius: 50%;
  border-radius: 50%;
  background-image: linear-gradient(to top right, #999, black, #999);
}
.softwareBtn span:nth-child(3):after {
  bottom: 9px;
  left: 9px;
  width: 2px;
  height: 2px;
  border: 2px solid white;
  -webkit-border-radius: 50%;
  -moz-border-radius: 50%;
  border-radius: 50%;
}
.emailBtn {
  position: relative;
  width: 32px;
  height: 32px;
  -webkit-border-radius: 7px;
  -moz-border-radius: 7px;
  border-radius: 7px;
  background-image: linear-gradient(#908dbe, #5e5c84, #5e5c84, #908dbe);
  display: block;
}
.emailBtn:before,
.emailBtn:after,
.emailBtn span:before,
.emailBtn span:after {
  content: '';
  position: absolute;
  display: block;
}
.emailBtn:before {
  top: 7px;
  left: 3px;
  width: 26px;
  height: 18px;
  -webkit-border-radius: 3px;
  -moz-border-radius: 3px;
  border-radius: 3px;
  background-image: linear-gradient(to top right, #d6f1e9, #fff);
}
.emailBtn:after {
  top: -1px;
  left: 7px;
  width: 17px;
  height: 17px;
  border: solid black;
  border-width: 0 0 1px 1px;
  -webkit-border-radius: 1px 0 1px 3px;
  -moz-border-radius: 1px 0 1px 3px;
  border-radius: 1px 0 1px 3px;
  transform: rotate(-45deg);
  -webkit-transform: rotate(-45deg);
  -moz-transform: rotate(-45deg);
  -o-transform: rotate(-45deg);
  -ms-transform: rotate(-45deg);
}
.emailBtn span:before,
.emailBtn span:after {
  top: 20px;
  width: 12px;
  height: 0;
  border-top: 1px solid black;
  -webkit-border-radius: 1px;
  -moz-border-radius: 1px;
  border-radius: 1px;
}
.emailBtn span:before {
  left: 2px;
  transform: rotate(-45deg);
  -webkit-transform: rotate(-45deg);
  -moz-transform: rotate(-45deg);
  -o-transform: rotate(-45deg);
  -ms-transform: rotate(-45deg);
}
.emailBtn span:after {
  right: 2px;
  transform: rotate(45deg);
  -webkit-transform: rotate(45deg);
  -moz-transform: rotate(45deg);
  -o-transform: rotate(45deg);
  -ms-transform: rotate(45deg);
}

<span class="softwareBtn"><span></span><span></span><span></span></span>
<br />
<span class="emailBtn"><span></span></span>