📅  最后修改于: 2022-03-11 14:47:51.300000             🧑  作者: Mango
.a {
display: contents;
border: 2px solid red;
background-color: #ccc;
padding: 10px;
width: 200px;
}
.b {
border: 2px solid blue;
background-color: lightblue;
padding: 10px;
}