<!DOCTYPE html>
<html>
<head>
<title>Заголовок документа</title>
<style>
table, td, th {
border: 1px solid black;
}
.table {
border-collapse: separate;
border-spacing: 20px;
}
</style>
</head>
<body>
<h2>Пример border-spacing: 20px;</h2>
<table class="table">
<tr>
<th>Имя</th>
<th>Фамилия</th>
</tr>
<tr>
<td>Mary</td>
<td>Peterson</td>
</tr>
<tr>
<td>Maxim</td>
<td>Brown</td>
</tr>
</table>
</body>
</html>