css
/*内外阴影添加*/
.tool-intro {
width: 1020px;
height: 100px;
margin: 0 auto;
margin-bottom: 50px;
padding: 20px;
text-align: left;
font-size: 14px;
position: relative;
background-color: White;
box-shadow: 0 1px 4px rgba(0, 0, 0, 0.3), 0px 0px 40px rgba(0, 0, 0, 0.1) inset;
-webkit-box-shadow: 0 1px 4px rgba(0, 0, 0, 0.3), 0 0 40px rgba(0, 0, 0, 0.1) inset;
-moz-box-shadow: 0 1px 4px rgba(0, 0, 0, 0.3), 0 0 40px rgba(0, 0, 0, 0.1) inset;
-ms-box-shadow: 0 1px 4px rgba(0, 0, 0, 0.3), 0px 0px 40px rgba(0, 0, 0, 0.1) inset;
} /*增加底部的重阴影效果 555~ 好技巧*/
.tool-intro::before, .tool-intro::after {
content: "";
position: absolute;
top: 50%;
bottom:;
left: 10px;
right: 10px;
z-index: -1;
box-shadow: 0 0 20px rgba(0,0,0,0.8);
-webkit-box-shadow: 0 0 20px rgba(0,0,0,0.8);
-moz-box-shadow: 0 0 20px rgba(0,0,0,0.8);
-ms-box-shadow: 0 0 20px rgba(0,0,0,0.8);
border-radius: 100px/10px;
-moz-border-radius: 100px/10px;
}
<article class="tool-intro"> </article>