示例
<div class="parent">
<div class='son1'>A</div>
<div class='son2'>B</div>
<div class='son3'>C</div>
</div>
.parent {
display: flex; ⭐️⭐️⭐️
align-items:center;
width: 300px;
height: 50px;
border: 1px solid black;
}
.son1,.son2,.son3 {
height: 30px;
line-height: 30px;
width: 30px;
border: 1px solid black;
border-radius: 4px;
text-align: center;
}
.son1,.son2 {
margin-left: 10px;
}
.son3 {
margin-left: auto; ⭐️⭐️⭐️
margin-right: 10px;
}
