body {
  font-family: 'Segoe UI', 'Helvetica Neue', sans-serif;
  background-color: #f9f9f9;
  color: #333;
  margin: 0;
  padding: 0;
  line-height: 1.6;
}

/* ヘッダー */
header {
  background-color: #005a9c;
  color: white;
  padding: 1.5em 1em;
  text-align: center;
  box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

header h1 {
  margin: 0;
  font-size: 2em;
}

/* ナビゲーション */
nav ul {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1em;
  margin: 1em 0 0;
  padding: 0;
}

nav a {
  text-decoration: none;
  color: white;
  background-color: #0078d4;
  padding: 0.6em 1.2em;
  border-radius: 5px;
  transition: background-color 0.3s;
}

nav a:hover {
  background-color: #005a9c;
}

/* メインセクション */
main {
  padding: 2em 1em;
  max-width: 1000px;
  margin: auto;
}

.intro img {
  max-width: 100%;
  height: auto;
  border-radius: 8px;
  margin-bottom: 1em;
}

.intro p {
  font-size: 1.2em;
  text-align: center;
}

/* グリッドセクション */
.support-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.5em;
  margin-top: 2em;
}

.support-grid div {
  background-color: white;
  padding: 1em;
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}

.support-grid h3 {
  margin-top: 0;
  color: #0078d4;
}

/* フッター */
footer {
  background-color: #005a9c;
  color: white;
  text-align: center;
  padding: 1em;
  margin-top: 3em;
  font-size: 0.9em;
}
.logo-container {
  text-align: center;
  margin-top: 20px;
}

.logo {
  width: 256px;
  height: 128px; /* 1:2 ‚̔䗦 */
  object-fit: contain;
}