/* 响应式。 */

@media (max-width: 1000px) {
  .download-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .review-layout,
  .privacy-layout {
    grid-template-columns: 1fr;
  }

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

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

@media (max-width: 860px) {
  .site-nav {
    position: fixed;
    top: 66px;
    left: 16px;
    right: 16px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 8px;
    border: 1px solid var(--line);
    border-radius: var(--radius-md);
    background: rgba(10, 10, 11, 0.96);
    backdrop-filter: blur(16px);
  }

  .site-nav.is-open {
    display: flex;
  }

  .site-nav a {
    padding: 11px 12px;
  }

  .site-nav a.is-current::after {
    display: none;
  }

  .icon-button.nav-toggle {
    display: inline-flex;
  }

  .hero-bar {
    flex-direction: column;
    align-items: stretch;
    border-radius: var(--radius-lg);
    padding: 18px;
    text-align: center;
  }

  .hero-bar .button {
    width: 100%;
  }
}

@media (max-width: 640px) {
  .download-grid,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .hero-actions .button {
    flex: 1 1 100%;
  }

  .showcase-meta {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }

  .footer-bottom {
    flex-direction: column;
  }
}