css中box-shadow的用法总结

.top-right{
width: 150px;
height: 80px;
background-color: green;
box-shadow: 4px 4px 4px salmon;
}
.top{
width: 150px;
height: 80px;
background-color: green;
box-shadow: 0px -4px 4px salmon;
}
.left{
width: 150px;
height: 80px;
background-color: green;
box-shadow: -4px 0px 4px salmon;
}
.range{
width: 150px;
height: 80px;
background-color: green;
box-shadow: 4px 4px 4px salmon,-4px 0px 4px salmon,0px -4px 4px salmon;
}

<div class="con">
<p class="top-right">box-shadow:</br>正值  正值  阴影 颜色</p>
<p class="top">box-shadow:</br>0  负值  阴影 颜色</p>
<p class="left">box-shadow:</br>0  负值  阴影 颜色</p>
<p class="range">box-shadow:</br>0  负值  阴影 颜色</p>
</div>