body { font-family: 'Noto Sans JP', sans-serif; margin: 0; background: #fdfdfd; color: #333; }
header { background: #0077b6; color: white; padding: 20px; text-align: center; }
header h1 { margin: 0; font-size: 2.5rem; }
header p { font-size: 1.2rem; margin-top: 8px; }

.hero { text-align: center; margin: 20px 0; }
.hero img { width: 100%; max-width: 1000px; height: auto; }

.section { max-width: 960px; margin: auto; padding: 20px; }
.card {
  background: white; padding: 20px; border-radius: 12px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.1); margin-bottom: 20px;
}
.card-center { text-align: center; }

.system-image {
  width: 100%;
  max-width: 600px;
  border-radius: 8px;
}

.icon-row {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  justify-content: center;
}

.icon-item {
  flex: 1 1 120px;
  text-align: center;
}

.icon-item img {
  width: 80px;
  height: auto;
}

h2 {
  color: #0077b6;
  border-left: 5px solid #0077b6;
  padding-left: 12px;
  margin-top: 0;
}
table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 12px;
}
table th, table td {
  border: 1px solid #ccc;
  padding: 8px;
  text-align: left;
}
table th {
  background: #0077b6;
  color: white;
}
.cta-button {
  display: inline-block;
  background: #0077b6;
  color: white;
  padding: 12px 24px;
  text-decoration: none;
  border-radius: 6px;
  font-weight: bold;
  transition: background 0.3s;
  margin-top: 16px;
}
.cta-button:hover {
  background: #005f87;
}

.footer-close-container {
  text-align: center;
  margin: 30px 0;
}

.close-window-button {
  background: #000000;
  color: white;
  padding: 12px 24px;
  font-size: 1rem;
  border: none;
  border-radius: 6px;
  cursor: pointer;
}

footer {
  text-align: center;
  padding: 20px;
  font-size: 0.9rem;
  color: #666;
}