/* WebNav Hub - 响应式样式文件 */

/* 大屏幕优化 */
@media (max-width: 1200px) {
  main {
    padding: 1rem;
    max-width: 95%;
  }

  .link-grid {
    grid-template-columns: repeat(auto-fill, minmax(8rem, 1fr));
    gap: 1rem;
  }
}

/* 平板设备 */
@media (max-width: 768px) {
  html {
    font-size: 15px;
  }

  main {
    padding: 0.8rem;
  }

  .link-grid {
    grid-template-columns: repeat(auto-fill, minmax(7rem, 1fr));
    gap: 0.8rem;
  }

  nav {
    padding: 0.4rem;
  }

  nav a {
    padding: 0.4rem 0.7rem;
    font-size: 0.95rem;
  }

  .category-title {
    font-size: 1.4rem;
    margin: 1.8rem 0 1rem;
  }

  .link-card {
    padding: 1rem 0.6rem;
    min-height: 80px;
  }

  .link-card i {
    font-size: 1.6rem;
    margin-bottom: 0.5rem;
  }

  .link-card h3 {
    font-size: 0.8rem;
    height: 2.4em;
  }

  .search-container {
    margin: 1.5rem auto;
    padding: 0 0.8rem;
  }

  .search-box {
    padding: 0.7rem 1rem;
  }

  .back-to-top {
    bottom: 1.5rem;
    right: 1.5rem;
    width: 45px;
    height: 45px;
    font-size: 1.1rem;
  }
}

/* 手机设备 */
@media (max-width: 480px) {
  html {
    font-size: 14px;
  }

  main {
    padding: 0.6rem;
  }

  .link-grid {
    grid-template-columns: repeat(auto-fill, minmax(6rem, 1fr));
    gap: 0.7rem;
  }

  header h1 {
    font-size: 1.6rem;
  }

  nav li {
    margin: 0.25rem;
  }

  nav a {
    padding: 0.35rem 0.6rem;
    font-size: 0.9rem;
  }

  .category-title {
    font-size: 1.4rem;
    margin: 1.8rem 0 1rem;
  }

  .link-card {
    padding: 0.8rem 0.5rem;
    min-height: 70px;
  }

  .link-card i {
    font-size: 1.4rem;
    margin-bottom: 0.4rem;
  }

  .link-card h3 {
    font-size: 0.75rem;
    padding: 0 0.2rem;
    height: 2.4em;
  }

  footer {
    padding: 0.8rem;
  }

  footer nav a {
    margin: 0 0.4rem;
    font-size: 0.7rem;
  }

  .search-container {
    margin: 1rem auto;
    padding: 0 0.6rem;
  }

  .search-box {
    padding: 0.6rem 0.8rem;
  }

  .search-input {
    font-size: 0.9rem;
  }

  .back-to-top {
    bottom: 1rem;
    right: 1rem;
    width: 40px;
    height: 40px;
    font-size: 1rem;
  }

  .no-results {
    padding: 2rem 1rem;
  }

  .no-results i {
    font-size: 2.5rem;
  }
}

/* 小屏手机 */
@media (max-width: 360px) {
  html {
    font-size: 13px;
  }

  .link-grid {
    grid-template-columns: repeat(auto-fill, minmax(5.5rem, 1fr));
    gap: 0.6rem;
  }

  header h1 {
    font-size: 1.4rem;
  }

  .link-card {
    padding: 0.8rem 0.5rem;
    min-height: 70px;
  }

  .link-card i {
    font-size: 1.3rem;
    margin-bottom: 0.3rem;
  }

  .link-card h3 {
    font-size: 0.7rem;
    padding: 0 0.15rem;
    height: 2.2em;
  }

  .search-container {
    padding: 0 0.5rem;
  }

  .search-box {
    padding: 0.5rem 0.7rem;
  }

  .back-to-top {
    width: 35px;
    height: 35px;
    font-size: 0.9rem;
  }
}

/* 横屏优化 */
@media (max-height: 500px) and (orientation: landscape) {
  .search-container {
    margin: 1rem auto;
  }

  .category-title {
    margin: 1rem 0 0.5rem;
    font-size: 1.3rem;
  }

  .link-grid {
    margin-bottom: 1rem;
  }

  .back-to-top {
    bottom: 0.5rem;
    right: 0.5rem;
  }
}

/* 高分辨率屏幕优化 */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
  .link-card {
    border: 0.5px solid rgba(255, 144, 0, 0.1);
  }
  
  .search-box {
    border: 0.5px solid rgba(255, 144, 0, 0.2);
  }
}

/* 打印样式 */
@media print {
  .search-container,
  .back-to-top,
  nav {
    display: none;
  }

  body {
    background: white;
    color: black;
  }

  .link-card {
    background: #f5f5f5;
    border: 1px solid #ddd;
    break-inside: avoid;
  }

  .category-title {
    color: #333;
    border-left-color: #333;
  }
}