时间：2021-07-01 10:21:17 帮助过：38人阅读
方法一：利用裁剪（该方法IE下不支持）
利用裁剪 clip-path: polygon（），直接画出一个三角 唯一一点需要算出大致百分比就可以画出来
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width">
<style>
.nav-box {
display: flex;
list-style: none;
font-size: 14px;
}
.nav-box li {
white-space: nowrap;
color: #019fe9;
background: #edf9ff;
counter-increment: listCounter;
clip-path: polygon(87% 0, 100% 50%, 87% 100%, 0 100%, 13% 50%, 0 0);
line-height: 40px;
padding: 0 25px;
margin-right: -10px;
}
.nav-box li::before {
content: counter(listCounter) "-";
}
.nav-box .active {
color: #fcfefe;
background: #009fe9;
}
.nav-box .active ~ li {
color: #8e8e8e;
background: #ebedf0;
}
</style>
</head>
<body>
<!-- 容器 -->
<ol class="nav-box">
<li><a href="">规则说明</a></li>
<li><a href="">参与活动</a></li>
<li class="active" aria-current="true"><a href="">参与抽奖</a></li>
<li><a href="">奖品发放</a></li>
<li><a href="">查看结果</a></li>
</ol>
</body>
</html>（相关教程推荐：CSS入门教程）
方法二：利用错位
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width">
<style scoped>
.nav-box {
display: flex;
list-style: none;
font-size: 14px;
}
.nav-box li {
white-space: nowrap;
color: #019fe9;
padding: 0 15px 0 25px;
line-height: 40px;
margin-left: 3px;
position: relative;
z-index: 99;
}
.nav-box li:first-child{
background: #edf9ff;
margin-right: 7px;
}
.nav-box .active:first-child{
background: #019fe9;
}
.nav-box li:first-child::before,
.nav-box li:first-child::after{
left: 7px;
}
.nav-box li::before,
.nav-box li::after {
content: "";
position: absolute;
left: 0;
height: 50%;
width: 100%;
background: #edf9ff;
z-index: -1;
}
.nav-box li::before {
top: 0;
transform: skew(30deg);
}
.nav-box li::after {
bottom: 0;
transform: skew(-30deg);
}
.nav-box .active {
color: #d7effb;
}
.nav-box .active::before,
.nav-box .active::after {
background: #009fe9;
}
.active ~ li {
color: #909091;
}
.active ~ li::before,
.active ~ li::after {
background: #ebedf0;
}
</style>
</head>
<body>
<!-- 容器 -->
<ol class="nav-box">
<li class="active">1-规则说明</li>
<li>2-参与活动</li>
<li>3-参与抽奖</li>
<li>4-奖品发放</li>
<li>5-参与结果</li>
</ol>
</body>
</html>方法三：border造三角
利用 border 生成前后三角
缺点是索引需要自己定义，不加标签情况下无法使用css计数器
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width">
<style>
.nav-box{
height:40px;
line-height:40px;
list-style: none;
padding:0;
display:flex;
font-size:14px;
overflow: hidden;
}
.nav-box li{
padding:0 10px 0 10px;
margin-right: 18px;
white-space: nowrap;
position:relative;
color:#019fe9;
background:#edf9ff ;
}
/* 三角 */
.nav-box li:before,.nav-box li:after{
content:'';
position:absolute;
width: 0;
height: 0;
}
.nav-box li:before{
right: -16px;
border: solid transparent;
border-width: 20px 0 20px 16px;
border-left-color:#edf9ff;
z-index:2;
}
/* 白线 */
.nav-box li:after{
top: -3px;
left: -18px;
border: solid #edf9ff;
border-width: 23px 0 23px 18px;
border-left-color: transparent;
z-index: 1;
}
.nav-box .active{
color: #fff;
background:#009fe9;
}
.nav-box .active ~ li{
color:#8e8e8e;
background:#ebedf0;
}
.nav-box .active:before{
border-left-color:#009fe9;
}
.nav-box .active:after{
border-color: #009fe9;
border-left-color: transparent;
}
.nav-box .active ~ li:before{
border-left-color:#ebedf0;
}
.nav-box .active ~ li:after{
border-color: #ebedf0;
border-left-color: transparent;
}
</style>
</head>
<body>
<ol class="nav-box">
<li>1-规则说明</li>
<li>2-参与活动</li>
<li class="active">3-参与抽奖</li>
<li>4-奖品发放</li>
<li>5-参与结果</li>
</ol>
</body>
</html>更多编程相关教程，请关注Gxlcms编程入门栏目！
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