标签倾斜横幅效果

<!-- run -->
<style>
.bg{
  overflow: hidden;
    width: 300px;
    height: 150px;
    margin: 30px;
    border-radius: 10px;
    box-shadow: 15px 15px 15px #999;
    background-color: cornflowerblue;
}
.text_bg{ 
   position: relative;
    content: '';
    margin-left: -170px;
    padding: 0px 180px;
    border-top: none;
    z-index: 1;
    color: #fff;
    transform: rotate(-45deg);
    font-size: 22px;
    background: #446495;
}
</style>

<div>
<div class="bg">
<div class="text_bg">爆款</div>
</div>
</div>