html css 标题背景 折边凸显效果

#exp-detail .exp-content h2 {
background-position: 0 -82px;
font-size: 14px;
font-weight: bold;
height: 48px;
line-height: 40px;
margin: 15px -24px 0 -31px;
padding-left: 27px;
position: relative;
}