css button 的四种状态 focus 伪类相关的知识，希望对你有一定的参考价值。
1.普通状态2，鼠标hover状态 3.active 点击状态 4.focus 取得焦点状态
<!DOCTYPE html><head>
<meta charset="utf-8">
<title>价格</title>
<style>
.banner{
}
.tab {
display: flex;
justify-content: center;
}
.tablinks {
background-color:#f66f6a;
color:white;
width: 300px;
height: 50px;
border:0;
font-size: 16px;
box-sizing: content-box;
border-radius: 5px;
padding: 5px;
margin: 5px;
text-align: center;
line-height: 50px;
}
.tablinks:hover {
background-color: #ddd;
}
.tablinks:active {
background-color: #0256FF;
}
.tablinks:focus {
background-color: #0256FF;
}
.tabcontent {
display: none;
padding: 20px;
}
</style>
</head>
<body>
<div class="banner">
<h2>VirboxLM 产品价格</h2>
</div>
<div>
</div>
<div class="tab">
<button class="tablinks" onclick="openTab(event, 'Tab1')">云软许可价格</button>
<button class="tablinks" onclick="openTab(event, 'Tab2')">加密锁价格</button>
<button class="tablinks" onclick="openTab(event, 'Tab3')">VirboxLM 企业版价格</button>
</div>
<div id="Tab1" class="tabcontent">
<h3>云软许可价格</h3>
<div>
<h4>应用场景</h4>
</div>
</div>
<div id="Tab2" class="tabcontent">
<h3>选项卡二内容</h3>
<p>这是选项卡二的内容。</p>
</div>
<div id="Tab3" class="tabcontent">
<h3>选项卡三内容</h3>
<p>这是选项卡三的内容。</p>
</div>
<script>
function openTab(evt, tabName) {
var i, tabcontent, tablinks;
// 先将所有选项卡的内容隐藏
tabcontent = document.getElementsByClassName("tabcontent");
for (i = 0; i < tabcontent.length; i++) {
tabcontent[i].style.display = "none";
}
// 将所有选项卡的标签样式去掉
tablinks = document.getElementsByClassName("tablinks");
for (i = 0; i < tablinks.length; i++) {
tablinks[i].className = tablinks[i].className.replace(" active", "");
}
// 显示当前选项卡的内容和样式
document.getElementById(tabName).style.display = "block";
evt.currentTarget.className += " active";
}
// 默认打开第一个选项卡
document.getElementById("Tab1").style.display = "block";
document.getElementsByClassName("tablinks")[0].className += " active";
</script>
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