要在CSS中为网格项设置名称，请使用grid-area属性和 grid-template-areas 属性：
<!DOCTYPE html>
<html>
<head>
<style>
.container {
display: grid;
background-color: green;
grid-template-areas: 'demo demo . . .' 'demo demo . . .';
padding: 20px;
grid-gap: 10px;
}
.container > div {
background-color: orange;
text-align: center;
padding: 10px 0;
font-size: 20px;
}
.ele1 {
grid-area: demo;
}
</style>
</head>
<body>
<h1>Game Board</h1>
<div class = "container">
<div class = "ele1">1</div>
<div class = "ele2">2</div>
<div class = "ele3">3</div>
<div class = "ele4">4</div>
<div class = "ele5">5</div>
<div class = "ele6">6</div>
</div>
</body>
</html>