关于16个格子的位置问题!
#grid-container{
width: 480px;
height: 480px;
padding: 10px;
margin: 0 auto;
background-color: #8B008B;
border-radius: 10px;
display: flex;
flex-wrap: wrap;
align-items: center;
justify-content: center;
}
.grid-cell{
width: 100px;
height: 100px;
border: 1px solid red;
margin: 5px;
}