css-选中某个元素后的兄弟元素

html
<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
    <style>
      .parent .active ~ .namec {
        background: yellow;
      }
      .parent .active {
        background-color: #ddd;
      }
    </style>
  </head>
  <body>
    <div class="parent" style="width: 100px; height: 200px; background: red">
      <div class="namec" style="width: 100px; height: 20px">1</div>
      <div class="namec" style="width: 100px; height: 20px">2</div>
      <div class="namec active" style="width: 100px; height: 20px">3</div>
      <div class="namec" style="width: 100px; height: 20px">4</div>
      <div class="namec" style="width: 100px; height: 20px">5</div>
      <div class="namec" style="width: 100px; height: 20px">6</div>
    </div>
  </body>
</html>