Not
ナビゲーションに移動
検索に移動
<html>
<head>
<style>
.box { background-color: red; }
.box:not(#box1) { background-color: blue; }
</style>
</head>
<body>
<div id="box1" class="box">box1</div>
<div id="box2" class="box">box2</div>
<div id="box3" class="box">box3</div>
</body>
