/* ========================================
   响应式布局 - 移动端适配
   ======================================== */

/* ===== Tablet (768px - 1024px) ===== */
@media (max-width: 1024px) {
  .content-layout {
    grid-template-columns: 1fr 260px;
    gap: 20px;
  }

  .hero-stats {
    gap: 40px;
  }

  .stat-num {
    font-size: 36px;
  }

  .header .container {
    gap: 15px;
  }

  .main-nav li a {
    padding: 8px 10px;
    font-size: 14px;
  }

  .header-search input {
    width: 150px;
  }
}

/* ===== Mobile Landscape (600px - 768px) ===== */
@media (max-width: 768px) {
  html {
    font-size: 13px;
  }

  .top-bar {
    font-size: 11px;
    padding: 4px 0;
  }

  .top-bar .container {
    flex-direction: column;
    gap: 3px;
  }

  .header {
    padding: 12px 0;
  }

  .header .container {
    flex-wrap: wrap;
    gap: 10px;
  }

  .logo h1 {
    font-size: 22px;
  }

  .logo p {
    display: none;
  }

  .main-nav {
    order: 3;
    width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }

  .main-nav ul {
    gap: 3px;
    white-space: nowrap;
  }

  .main-nav li a {
    padding: 6px 12px;
    font-size: 13px;
  }

  .header-search {
    margin-left: auto;
  }

  .header-search input {
    width: 130px;
    padding: 6px 10px;
    font-size: 12px;
  }

  .header-search button {
    padding: 6px 12px;
    font-size: 12px;
  }

  .hero-banner {
    padding: 30px 0;
  }

  .hero-content h2 {
    font-size: 24px;
  }

  .hero-content p {
    font-size: 14px;
  }

  .hero-stats {
    gap: 25px;
  }

  .stat-num {
    font-size: 28px;
  }

  .stat-label {
    font-size: 11px;
  }

  .content-layout {
    grid-template-columns: 1fr;
    gap: 15px;
  }

  .content-right {
    order: 2;
  }

  .server-grid {
    grid-template-columns: 1fr;
    padding: 15px;
  }

  .server-table {
    font-size: 12px;
  }

  .server-table th,
  .server-table td {
    padding: 10px 8px;
  }

  .filter-bar .container {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
  }

  .filter-group {
    gap: 5px;
  }

  .filter-tag {
    padding: 4px 10px;
    font-size: 12px;
  }

  .section-header {
    padding: 14px 15px;
  }

  .section-header h3 {
    font-size: 16px;
  }

  .page-content {
    padding: 20px 15px;
  }

  .page-content h2 {
    font-size: 20px;
  }

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

  .quick-links {
    grid-template-columns: repeat(3, 1fr);
  }

  .footer {
    padding: 25px 0 15px;
  }

  .footer-links a {
    font-size: 12px;
    margin: 0 3px;
  }

  .back-to-top {
    bottom: 15px;
    right: 15px;
    width: 40px;
    height: 40px;
    line-height: 40px;
    font-size: 18px;
  }
}

/* ===== Mobile Portrait (under 600px) ===== */
@media (max-width: 600px) {
  .hero-content h2 {
    font-size: 20px;
  }

  .hero-stats {
    gap: 15px;
  }

  .stat-num {
    font-size: 24px;
  }

  .server-table th:nth-child(4),
  .server-table td:nth-child(4) {
    display: none;
  }

  .server-list-item {
    flex-wrap: wrap;
    gap: 8px;
  }

  .server-list-item .item-time {
    min-width: auto;
    order: 3;
    width: 100%;
  }

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

  .pagination a,
  .pagination span {
    padding: 6px 10px;
    font-size: 12px;
  }

  .error-page h2 {
    font-size: 60px;
  }

  .error-page p {
    font-size: 16px;
  }

  .error-actions {
    flex-direction: column;
    align-items: center;
  }
}

/* ===== Print Styles ===== */
@media print {
  .header,
  .footer,
  .top-bar,
  .back-to-top,
  .header-search {
    display: none;
  }

  .content-layout {
    grid-template-columns: 1fr;
  }

  a {
    color: #000;
    text-decoration: underline;
  }
}