@media (max-width: 800px) {
  .intro {
    grid-template-columns: 1fr;
    gap: 24px;
    padding: 32px 0 28px;
  }
  .directory-layout {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  .category-nav {
    position: static;
    flex-direction: row;
    flex-wrap: wrap;
    gap: 5px;
  }
  .category-button {
    font-size: 12px;
    gap: 6px;
    min-height: 40px;
    padding: 9px 11px;
  }
  .category-button svg {
    width: 16px;
    height: 16px;
  }
  .video-card {
    display: grid;
    grid-template-columns: 64px minmax(0, 1fr);
    column-gap: 12px;
  }
  .cover-frame {
    width: 100%;
    max-height: 270px;
  }
  .video-name {
    font-size: 15px;
    margin: 10px 0 4px;
  }
  .video-caption {
    font-size: 12px;
  }
  .video-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px 14px;
  }
  .site-row {
    min-height: 100px;
  }
  .footer {
    margin: 0 32px;
  }
  .category-group h3 {
    margin-top: 8px;
  }
}
@media (max-width: 640px) {
  .header-inner {
    min-height: 70px;
    padding: 16px 20px 12px;
    flex-wrap: wrap;
    gap: 8px;
  }
  .service-nav {
    width: 100%;
    justify-content: space-between;
    gap: 0;
  }
  .service-nav a {
    padding-inline: 10px;
  }
}
@media (max-width: 520px) {
  .brand > span {
    font-size: 21px;
  }
  .brand-label {
    display: none;
  }
  .brand img {
    width: 32px;
    height: 32px;
  }
  .page {
    padding: 0 20px;
  }
  h1 {
    font-size: 29px;
  }
  .search-box {
    min-height: 55px;
  }
  .featured {
    padding: 20px 0 28px;
  }
  .section-heading {
    margin-bottom: 15px;
  }
  h2 {
    font-size: 16px;
  }
  .video-caption {
    display: none;
  }
  .video-name {
    font-size: 14px;
    line-height: 1.35;
  }
  .cover-frame {
    border-radius: 8px;
  }
  .video-grid {
    gap: 10px;
  }
  .directory-layout {
    padding-top: 20px;
    gap: 18px;
  }
  .site-grid {
    grid-template-columns: 1fr;
  }
  .site-row {
    padding: 17px 0;
    min-height: 84px;
    gap: 13px;
  }
  .site-name {
    font-size: 16px;
  }
  .site-description {
    font-size: 13px;
  }
  .directory-heading {
    margin-bottom: 10px;
  }
  .directory-heading h2 {
    font-size: 19px;
  }
  .category-group {
    margin-bottom: 23px;
  }
  .footer {
    margin: 0 20px;
    padding: 24px 0 30px;
  }
  .footer nav {
    gap: 16px;
  }
  .footer-brand {
    font-size: 16px;
  }
}
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    transition: none !important;
    scroll-behavior: auto !important;
  }
}