/* ===== 响应式设计 ===== */
@media (max-width: 768px) {
  .home-container,
  .about-container {
    padding: 15px;
  }

  .page-header {
    padding: 30px 15px;
    margin-bottom: 30px;
  }

  .header-title {
    font-size: 2rem;
  }

  .header-subtitle {
    font-size: 1rem;
  }

  .price-grid {
    grid-template-columns: 1fr;
    gap: 20px;
    margin-bottom: 30px;
  }

  .data-source {
    padding: 15px;
    gap: 12px;
    flex-direction: column;
    justify-content: center;
  }

  .source-info {
    flex-direction: column;
    gap: 8px;
    text-align: center;
  }

  .error-message, .loading-message {
    padding: 30px 15px;
  }

  .about-content {
    padding: 30px 20px;
    margin-top: 20px;
  }

  .feature-list {
    grid-template-columns: 1fr;
    gap: 15px;
  }

  .home-skeleton {
    padding: 16px;
    margin: 10px;
  }
  
  .skeleton-buttons {
    flex-direction: column;
    gap: 12px;
  }
  
  .skeleton-button {
    width: 100%;
  }

  .footer-links {
    gap: 20px;
  }
}

@media (max-width: 480px) {
  .home-container,
  .about-container {
    padding: 10px;
  }

  .page-header {
    padding: 25px 10px;
  }

  .header-title {
    font-size: 1.8rem;
  }

  .header-subtitle {
    font-size: 0.9rem;
  }

  .price-grid {
    gap: 15px;
    margin-bottom: 25px;
  }

  .data-source {
    padding: 12px;
    gap: 10px;
    flex-direction: column;
    justify-content: center;
  }

  .source-info {
    flex-direction: column;
    gap: 6px;
    text-align: center;
  }

  .source-value {
    font-size: 1rem;
    padding: 6px 12px;
  }

  .update-time {
    font-size: 0.8rem;
  }

  .about-content {
    padding: 20px 15px;
    margin-top: 15px;
  }

  .about-title {
    font-size: 1.5rem;
  }

  .about-description {
    font-size: 1rem;
  }

  .footer-links {
    flex-direction: column;
    gap: 15px;
  }
}