HTML <thead>: 표 헤더 요소

<table>
  <caption>우리 매장 원산지 표기</caption>
  <thead>
    <tr>
      <th>종류</th>
      <th>품목</th>
      <th>원산지</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <th rowspan="3">과일</th>
      <td>사과</td>
      <td rowspan="2">국산</td>
    </tr>
    <tr>
      <td>배</td>
    </tr>
    <tr>
      <td>파인애플</td>
      <td>수입산</td>
    </tr>
    <tr>
      <th>곡물</th>
      <td>쌀</td>
      <td>국산</td>
    </tr>
    <tr>
      <th>해산물</th>
      <td>고등어</td>
      <td>원양산</td>
    </tr>
  </tbody>
</table>

th,
td {
  border: 1px solid #777;
  padding: 8px;
}

th {
  background: #efefef;
  color: #333;
}