/* 全体レイアウト */
*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Helvetica Neue",
    "Segoe UI", "YuGothic", "Yu Gothic", "メイリオ", sans-serif;
  line-height: 1.7;
  color: #333;
  background-color: #f7f7f7;
}

.container {
  width: 90%;
  max-width: 960px;
  margin: 0 auto;
}

/* ヘッダー */
.page-header {
  background: linear-gradient(135deg, #4f9eed, #7fc6ff);
  color: #fff;
  padding: 40px 0 30px;
  margin-bottom: 24px;
}

.page-header h1 {
  margin: 0 0 8px;
  font-size: 1.8rem;
}

.page-desc {
  margin: 0;
  font-size: 0.9rem;
  opacity: 0.9;
}

/* セクション */
.info-section {
  background-color: #fff;
  border-radius: 8px;
  padding: 20px 18px;
  margin-bottom: 16px;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.04);
}

.info-section h2 {
  margin-top: 0;
  margin-bottom: 14px;
  font-size: 1.1rem;
  border-left: 4px solid #4f9eed;
  padding-left: 8px;
}

/* 定義リスト */
.info-section dl {
  margin: 0;
}

.info-section .row {
  display: grid;
  grid-template-columns: 150px 1fr;
  gap: 12px 20px;
  padding: 10px 0;
  border-bottom: 1px solid #eee;
}

.info-section .row:last-child {
  border-bottom: none;
}

.info-section dt {
  font-weight: 600;
  font-size: 0.9rem;
  color: #555;
}

.info-section dd {
  margin: 0;
  font-size: 0.9rem;
}

/* リンク */
a {
  color: #2f74c0;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

/* フッター */
.page-footer {
  text-align: center;
  padding: 20px 0 30px;
  font-size: 0.8rem;
  color: #777;
}

/* スマホ対応 */
@media (max-width: 600px) {
  .page-header {
    padding: 28px 0 20px;
  }

  .page-header h1 {
    font-size: 1.4rem;
  }

  .info-section {
    padding: 16px 14px;
  }

  .info-section .row {
    grid-template-columns: 1fr;
    padding: 10px 0;
  }

  .info-section dt {
    font-weight: 700;
  }
}