虽然迟到了，但这里有一个对我有效的自助解决方案。我使用Bootstrap 4:

<link href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css" rel="stylesheet"/> 身体< > <div class="行mt-4"> < div class = " col-md-12”> <span class="bg-dark text-white round -circle px-3 py-1 mx-2 h3">1</span> <span class="bg-dark text-white round -circle px-3 py-1 mx-2 h3">2</span> <span class="bg-dark text-white round -circle px-3 py-1 mx-2 h3">3</span> < / div > < / div > 身体< / >

基本上，您将bg-dark text-white圆圆px-3 py-1 mx-2 h3类添加到<span>(或其他)元素中，就完成了。

请注意，如果内容有多个数字，则可能需要调整边距和填充类。

.numberCircle { 这个特性:50%; 宽度:40像素; 高度:40像素; 显示:块; 浮:左; 边框:2px实体#000000; 颜色:# 000000; text-align:中心; margin-right: 5 px; ｝ <h3><span class="numberCircle">1</span> Regiones del Interior</h3>

这是我的方法，用平方法。优点是它适用于不同的值，但你需要两个跨度。

.circle { display: inline-block; border: 1px solid black; border-radius: 50%; position: relative; padding: 5px; } .circle::after { content: ''; display: block; padding-bottom: 100%; height: 0; opacity: 0; } .num { position: absolute; top: 50%; transform: translateY(-50%); } .width_holder { display: block; height: 0; overflow: hidden; } <div class="circle"> <span class="width_holder">1</span> <span class="num">1</span> </div> <div class="circle"> <span class="width_holder">11</span> <span class="num">11</span> </div> <div class="circle"> <span class="width_holder">11111</span> <span class="num">11111</span> </div> <div class="circle"> <span class="width_holder">11111111</span> <span class="num">11111111</span> </div>

你可以使用

span.red { background: red; border-radius: 0.8em; -moz-border-radius: 0.8em; -webkit-border-radius: 0.8em; color: #ffffff; display: inline-block; font-weight: bold; line-height: 1.6em; margin-right: 15px; text-align: center; width: 1.6em; } span.grey { background: #cccccc; border-radius: 0.8em; -moz-border-radius: 0.8em; -webkit-border-radius: 0.8em; color: #fff; display: inline-block; font-weight: bold; line-height: 1.6em; margin-right: 15px; text-align: center; width: 1.6em; } span.green { background: #5EA226; border-radius: 0.8em; -moz-border-radius: 0.8em; -webkit-border-radius: 0.8em; color: #ffffff; display: inline-block; font-weight: bold; line-height: 1.6em; margin-right: 15px; text-align: center; width: 1.6em; } span.blue { background: #5178D0; border-radius: 0.8em; -moz-border-radius: 0.8em; -webkit-border-radius: 0.8em; color: #ffffff; display: inline-block; font-weight: bold; line-height: 1.6em; margin-right: 15px; text-align: center; width: 1.6em; } span.pink { background: #EF0BD8; border-radius: 0.8em; -moz-border-radius: 0.8em; -webkit-border-radius: 0.8em; color: #ffffff; display: inline-block; font-weight: bold; line-height: 1.6em; margin-right: 15px; text-align: center; width: 1.6em; } <h1><span class="grey">1</span>A grey circle with number inside</h1> <h1><span class="red">2</span>A red circle with number inside</h1> <h1><span class="blue">3</span>A blue circle with number inside</h1> <h1><span class="green">4</span>A green circle with number inside</h1> <h1><span class="pink">5</span>A pink circle with number inside</h1>

感谢https://wpsites.net/web-design/colored-numbered-circles-using-pure-css-html/

我很惊讶没有人使用更容易理解的flex，所以我把我的答案放在这里:

要创建一个圆，请确保宽等于高 为了适应圆圈中数字的字体大小，请使用em而不是px 要将数字居中，请使用flex和justify-content: center;对齐项目:中心; 如果数字增加(例如>1000)，则同时增加宽度和高度

这里有一个例子:

.circled-number { color: #666; border: 2px solid #666; border-radius: 50%; font-size: 1rem; display: flex; justify-content: center; align-items: center; width: 2em; height: 2em; } .circled-number--big { color: #666; border: 2px solid #666; border-radius: 50%; font-size: 1rem; display: flex; justify-content: center; align-items: center; width: 4em; height: 4em; } <div class="circled-number"> 30 </div> <div class="circled-number--big"> 3000000 </div>

对于根据内容变化的圆圈大小，这应该是有效的:

.numberCircle { display: inline-block; line-height: 0px; border-radius: 50%; border: 2px solid; font-size: 32px; } .numberCircle span { display: inline-block; padding-top: 50%; padding-bottom: 50%; margin-left: 8px; margin-right: 8px; } <span class="numberCircle"><span>30</span></span> <span class="numberCircle"><span>1</span></span> <span class="numberCircle"><span>5435</span></span> <span class="numberCircle"><span>2</span></span> <span class="numberCircle"><span>100</span></span>

它依赖于内容的宽度加上margin- s来确定半径，然后使用padding- s扩展高度以匹配。margin-'s需要根据字体大小进行调整。

更新以删除内部元素:

.numberCircle { display: inline-block; border-radius: 50%; border: 2px solid; font-size: 32px; } .numberCircle:before, .numberCircle:after { content: '\200B'; display: inline-block; line-height: 0px; padding-top: 50%; padding-bottom: 50%; } .numberCircle:before { padding-left: 8px; } .numberCircle:after { padding-right: 8px; } <span class="numberCircle">30</span> <span class="numberCircle">1</span> <span class="numberCircle">5435</span> <span class="numberCircle">2</span> <span class="numberCircle">100</span>

使用伪元素强制高度。垂直对齐需要零宽度空间。将line-height:0px从外层移到伪层，这样在IE8降级时至少是可见的。