/* 平板 */
@media (max-width: 992px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

/* 手机 */
@media (max-width: 768px) {
  :root {
    --section-padding: 48px 0;
  }

  /* 移动端导航 */
  .menu-toggle { display: flex; }

  .main-nav {
    position: fixed;
    top: 72px;
    left: 0;
    width: 100%;
    background: var(--bg-white);
    box-shadow: var(--shadow-md);
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.35s ease;
  }

  .main-nav.open {
    max-height: 400px;
  }

  .main-nav ul {
    flex-direction: column;
    padding: 16px 20px;
    gap: 0;
  }

  .main-nav a {
    display: block;
    padding: 12px 0;
    border-bottom: 1px solid #f1f5f9;
  }

  /* Hero 适配 */
  .hero-content h1 { font-size: 2rem; }
  .hero-content p  { font-size: 1rem; }

  /* 页脚 */
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .page-banner h1 { font-size: 1.8rem; }
  .section-title h2 { font-size: 1.5rem; }
}