先上效果：
HTML:
<div class="tag">
<div class="tag-box">
<div class="tag-content-box">
<div class="tag-content">
<span class="tag-content-line"></span>
<span class="tag-content-text"> 2016.05.24 </span>
</div>
<div class="tag-tail top"></div><div class="tag-tail bottom"></div>
<div class="tag-tail below"></div>
</div>
</div>
</div>
CSS:
.tag {
width: 100%;
border-right: 1px solid #DDD;
-moz-border-radius: 4px 0px 0px 4px;
-webkit-border-radius: 4px 0px 0px 4px;
border-radius: 4px 0px 0px 4px;
float: left;
clear: both;
margin: 30px 0;
}
.tag-box {
width: 100%;
height: 50px;
position: relative
}
.tag-content-box {
position: absolute;
color: #792f2f;
top: 16px;
left: 6px;
border-left: solid 6px #f0807b;
}
.tag-content {
font-size: 14px;
line-height: 20px;
height: 20px;
padding: 5px 15px 5px 17px;
color: #ffffff!important;
background: rgba(255, 126, 121, 0.5);
}
.tag-content-line {
border-left: solid 1px #fff;
position: absolute;
padding: 100% 0;
left: 0;
top: 0;
}
.tag-content-text {
text-shadow: 1px 1px 1px rgba(0, 0, 0, 0.59);
}
.tag-tail {
width: 0;
height: 0;
border-left: 16px solid rgba(240, 128, 123, 0.74);
border-right: 0 none;
position: absolute;
right: -14px;
border-left-color: rgba(240, 128, 123, 0.74);
}
.tag-tail.top {
border-top: 0 solid transparent;
border-bottom: 16px solid transparent;
top: 0;
}
.tag-tail.bottom {
border-top: 16px solid transparent;
border-bottom: 0 solid transparent;
bottom: 0;
}
.tag-tail.below {
border-top: 0px solid transparent;
border-bottom: 10px solid transparent;
border-left: 0px solid transparent;
border-right: 6px solid #d15952;
top: 100%;
left: -6px;
}