📅  最后修改于: 2022-03-11 14:47:46.741000             🧑  作者: Mango
.banner {
position: absolute;
left: 40px;
width: calc(100% - 70px);
border: solid black 1px;
box-shadow: 1px 2px;
background-color: yellow;
padding: 6px;
text-align: center;
box-sizing: border-box;
}