12.写了一个怪怪的边框
效果图
DOM
<div class="shape-10 box"> </div>
css
.shape-10{
background: yellowgreen;
border: 10px dashed #655;
outline: 5px dashed deeppink;
outline-offset: -10px;
}
.box-shadow{
height: 300px;
width: 534px;
margin: 20px auto;
}