我需要这样的效果，层级很多但是只想选中active下的第一个red元素，这种需要怎么实现呢？需要用css选择器完成
代码：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta http-equiv="X-UA-Compatible" content="IE=edge" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>css</title>
</head>
<body>
<div class="box">
<div class="p1 active">
<div class="c1">
<div class="red">我是红色</div>
<div class="red">嘻嘻嘻</div>
</div>
<div class="c2">
<div class="red">哈哈哈</div>
<div class="red">呵呵</div>
</div>
</div>
<div class="p2">
<div class="c1">
<div class="red">我是红色</div>
<div class="red">嘻嘻嘻</div>
</div>
<div class="c2">
<div class="red">哈哈哈</div>
<div class="red">呵呵</div>
</div>
</div>
</div>
<style>
/* .active .red {
color: red;
} */
</style>
</body>
</html>
