使用display:grid方法，你可以简单地把所有的ul子元素放到同一个单元格中，然后设置justification -self:

.ul { 显示:网格; ｝ .ul > * { grid-column-start: 1; grid-row-start: 1; justify-self:中心; ｝ .ul > *:last child { justify-self:正确; ｝ /* Make Fancy */ .li { 显示:inline-block; 保证金:1 px; 填充:5 px; 背景:# bbb; ｝ < div class =“ul”> < span > < span类=‘李’> < / span > B <跨类=‘李’> < / span > < span类=‘李’> C > < /跨度 < / span > D <跨类=‘李’> < / span > < / div >

使用display:grid方法，你可以简单地把所有的ul子元素放到同一个单元格中，然后设置justification -self:

.ul { 显示:网格; ｝ .ul > * { grid-column-start: 1; grid-row-start: 1; justify-self:中心; ｝ .ul > *:last child { justify-self:正确; ｝ /* Make Fancy */ .li { 显示:inline-block; 保证金:1 px; 填充:5 px; 背景:# bbb; ｝ < div class =“ul”> < span > < span类=‘李’> < / span > B <跨类=‘李’> < / span > < span类=‘李’> C > < /跨度 < / span > D <跨类=‘李’> < / span > < / div >

接受的答案可以改变一点，因为你可以使用网格模板区域，没有假元素

grid-template-areas '. b c'
grid-template-columns: 1fr 1fr 1fr

最简单的方法

.box { 显示:flex; justify-content:中心; ｝ .item1 { flex: 1; 显示:flex; justify-content:中心; 变换:translateX(10px);/*D元素宽度[如果需要]*/ ｝ < div class = "盒子" > < div class = " item1”> < div > < / div > div < div > < / B > < div > C < / div > < / div > < div class = "第二条“> D < / div > < / div >

我扩展了Michael_B的答案

.center-flex__2-of-3 > :nth-child(1), .center-flex__2-of-3 > :nth-child(3) { flex: 1; } .center-flex__2-of-3 > :nth-child(1) { justify-content: flex-start; } .center-flex__2-of-3 > :nth-child(3) { justify-content: flex-end; } .center-flex__1-of-2 > :nth-child(1) { margin: auto; } .center-flex__1-of-2 > :nth-child(2) { flex: 1; justify-content: flex-end; } .center-flex__2-of-2 > :nth-child(1) { flex: 1; justify-content: flex-start; } .center-flex__2-of-2 > :nth-child(2) { margin: auto; } .center-flex__1-of-2:before, .center-flex__1-of-1:before { content: ''; flex: 1; } .center-flex__1-of-1:after, .center-flex__2-of-2:after { content: ''; flex: 1; } [class*=center-flex] { display: flex; list-style: none; margin: 0; padding: 0; border: 10px solid rgba(0, 0, 0, 0.1); } [class*=center-flex] > * { display: flex; } li { padding: 3px 5px; } 2 of 3 <ul class="center-flex__2-of-3"> <span> <li>Accusamus</li> <li>Porro</li> </span> <span> <li>Center</li> <li>this</li> </span> <span> <li>Accusamus</li> <li>Porro</li> <li>Culpa</li> <li>Sit</li> </span> </ul> <br><br> 1 of 2 <ul class="akex center-flex__1-of-2"> <span> <li>Center</li> <li>this</li> </span> <span> <li>Accusamus</li> <li>Porro</li> <li>Culpa</li> <li>Sit</li> </span> </ul> <br><br> 2 of 2 <ul class="akex center-flex__2-of-2"> <span> <li>Accusamus</li> <li>Porro</li> <li>Culpa</li> <li>Sit</li> </span> <span> <li>Center</li> <li>this</li> </span> </ul> <br><br> 1 of 1 <ul class="center-flex__1-of-1"> <span> <li>Center</li> <li>this</li> </span> </ul>

这里有SASS作为一个代码依赖的帮助

ul { 
  padding: 0; 
  margin: 0;
  display: flex;
  flex-direction: row;
  justify-content: center;
  align-items: center;
}
li {
  display: flex;
  margin: 1px;
  padding: 5px;
  background: #aaa;
}
li:last-child {
  background: #ddd;
  position:absolute;
  right:10px;

}

<ul>
  <li>A</li>
  <li>B</li>
  <li>C</li>
  <li>D</li>
</ul>