实现下划线比文字短

https://blog.csdn.net/yaoqiuquan/article/details/84102293

.head_line:after{
  content:"";
  display:block;
  width:30px;
  border-bottom:2px solid #ff3700;
  margin: 0 auto;
}

背景有透明度但文字不透明

/*background: #26272d;*/
background-color: rgba(38, 39, 45, 0.7);
position: relative;
/*opacity: 0.7;*/
filter: Alpha(opacity=70);