<!DOCTYPE html>
<html>
<head>
<title>Заголовок документа</title>
<style>
.span-container {
display: grid;
grid-template-columns: auto auto auto auto;
grid-gap: 10px;
background-color: #888;
padding: 10px;
margin-top: 20px;
}
.span-container > div {
background-color: #fff;
text-align: center;
padding: 20px 0;
font-size: 30px;
}
.span-box1 {
grid-column-start: span 2;
}
</style>
</head>
<body>
<h2>Пример свойства grid-column-start</h2>
<div class="span-container">
<div class="span-box1">1</div>
<div>2</div>
<div>3</div>
<div>4</div>
<div>5</div>
<div>6</div>
</div>
</body>
</html>