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使用runcode.html页面

2
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2025-11-07
创建时间
2025-11-07
最后更新
<div>
    <nav>导航</nav>
  </div>

  <s class="flow-box"></s>
body {
  line-height:1.5;
}
body {
    overflow-x: hidden;
    height: 2000px;
}

div {
    height: 100px;
    border: solid deepskyblue;
    margin-top: 50px;
}
nav {
    position: sticky;
    top: 20px;
    background: lightskyblue;
}


.flow-box {
    position: fixed;
    top: 20px; left: 0; right: 0; bottom: 0;
    background-color: #d30000;
    opacity: .7;
    mix-blend-mode: multiply;
}
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