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HTML

              
                <table class="sample-table">
  <tbody>
    <tr>
      <th>会社名</th>
      <td>株式会社○○○○</td>
    </tr>
    <tr>
      <th>住所</th>
      <td>〒160-0013<br>東京都新宿区霞ヶ丘町○○○○</td>
    </tr>
    <tr>
      <th>電話番号</th>
      <td>03-○○○○-○○○○</td>
    </tr>
    <tr>
      <th>代表者</th>
      <td>代表取締役 ○○ ○○○</td>
    </tr>
  </tbody>
</table>
              
            
!

CSS

              
                /* テーブル */
table.sample-table {
  /* 中央揃え + 上下20pxのマージン */
  margin: 20px auto;
  /* テーブルの幅 */
  width: 500px;
  /* 境界なし */
  border-collapse: collapse;
}

/* テーブルの見出し */
table.sample-table th {
  /* 中央揃え */
  text-align: center;
  /* 太字 */
  font-weight: bold;
}

/* テーブルの見出しとセル */
table.sample-table th,
table.sample-table td {
  /* ボーダー(上) */
  border-top: 1px solid;
  /* パディング(上下左右) */
  padding: 15px;
}

/* テーブルの最後の見出しとセル */
table.sample-table tr th:last-of-type,
table.sample-table tr td:last-of-type {
  /* ボーダー(下) */
  border-bottom: 1px solid;
}

/* ホバー状態 */
table.sample-table tr:hover {
  /* 背景色を薄いグレー */
  background-color: #F2F2F2;
}
              
            
!

JS

              
                
              
            
!
999px

Console