/* =========================================
   Beaver Innovation - Responsive
   响应式适配
   ========================================= */

/* Tablet Landscape & Below */
@media (max-width: 1180px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }

  .footer-brand {
    grid-column: 1 / -1;
    max-width: 100%;
  }

  .news-grid {
    grid-template-columns: 1fr 1fr;
  }

  .news-card.featured {
    grid-column: 1 / -1;
  }

  .product-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .case-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .course-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .feature-list {
    grid-template-columns: repeat(2, 1fr);
  }

  .quick-entries {
    grid-template-columns: repeat(2, 1fr);
  }

  .team-categories {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* Tablet Portrait */
@media (max-width: 920px) {
  .nav-menu {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    width: min(320px, 80vw);
    background: rgba(5, 11, 26, 0.97);
    backdrop-filter: blur(24px);
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    padding: 100px 24px 32px;
    transform: translateX(100%);
    transition: transform var(--transition-base);
    border-left: 1px solid var(--color-border);
    gap: 4px;
  }

  .nav-menu.open {
    transform: translateX(0);
  }

  .nav-link {
    padding: 14px 18px;
    font-size: 1rem;
    border-radius: var(--radius-md);
  }

  .nav-toggle {
    display: flex;
    z-index: calc(var(--z-header) + 1);
  }

  .nav-cta {
    display: none;
  }

  .hero-stats {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }

  .business-grid {
    grid-template-columns: 1fr;
  }

  .team-founders {
    grid-template-columns: 1fr;
  }

  .charity-banner {
    grid-template-columns: 1fr;
    padding: 40px;
    gap: 32px;
  }

  .contact-grid {
    grid-template-columns: 1fr;
  }

  .solution-grid {
    grid-template-columns: 1fr;
  }
}

/* Mobile */
@media (max-width: 640px) {
  :root {
    --section-pad-y: 60px;
  }

  .container {
    width: calc(100% - 32px);
  }

  .hero {
    padding: 110px 0 60px;
    min-height: auto;
  }

  .hero-stats {
    grid-template-columns: 1fr 1fr;
    padding-top: 28px;
  }

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
    margin-bottom: 40px;
  }

  .hero-actions .btn {
    width: 100%;
  }

  .quick-entries {
    grid-template-columns: 1fr;
    margin-top: -30px;
    margin-bottom: 40px;
    gap: 12px;
  }

  .product-grid,
  .course-grid,
  .case-grid,
  .feature-list,
  .news-grid,
  .team-categories {
    grid-template-columns: 1fr;
  }

  .business-card {
    padding: 28px;
    min-height: auto;
  }

  .business-card-num {
    top: 20px;
    right: 20px;
  }

  .founder-card {
    grid-template-columns: 1fr;
    padding: 28px;
    text-align: center;
  }

  .founder-avatar {
    margin: 0 auto;
  }

  .founder-tags {
    justify-content: center;
  }

  .charity-banner {
    padding: 28px;
  }

  .charity-banner-stats {
    grid-template-columns: 1fr 1fr;
    gap: 12px;
  }

  .contact-info-card,
  .call-card {
    padding: 28px;
  }

  .call-number {
    padding: 18px 20px;
    gap: 12px;
  }

  .call-number svg {
    width: 24px;
    height: 24px;
  }

  .cta-section {
    padding: 40px 24px;
  }

  .cta-actions {
    flex-direction: column;
  }

  .cta-actions .btn {
    width: 100%;
  }

  .footer-grid {
    grid-template-columns: 1fr;
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }

  .nav-logo-text {
    display: none;
  }

  .solution-card {
    padding: 24px;
    flex-direction: column;
    gap: 16px;
  }

  .video-showcase-info {
    bottom: 16px;
    left: 16px;
    right: 16px;
  }

  .video-showcase-title {
    font-size: 1.05rem;
  }

  .video-play-btn {
    width: 64px;
    height: 64px;
  }

  .video-play-btn svg {
    width: 24px;
    height: 24px;
  }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* Print */
@media print {
  .site-header,
  .site-footer,
  .nav-toggle,
  .hero-bg,
  .hero-orbs {
    display: none !important;
  }

  body {
    background: white;
    color: black;
  }
}