/* ============================================================
   WLinfoBlue - Responsive Styles
   三断点响应式适配
   ============================================================ */

/* ----------------------------------------------------------
   平板端（768px - 1200px）
   ---------------------------------------------------------- */
@media (min-width: 768px) and (max-width: 1200px) {
  /* 版心 */
  .container {
    padding: 0 20px;
  }

  /* 导航：汉堡菜单 */
  .main-nav {
    display: none;
  }

  .hamburger-btn {
    display: flex;
  }

  /* 移动端菜单展开 */
  .main-nav.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: var(--bg-card);
    box-shadow: var(--shadow-hover);
    padding: var(--spacing-md);
    gap: var(--spacing-sm);
    z-index: 999;
  }

  /* 移动端菜单遮罩层 */
  .nav-overlay {
    display: none;
    position: fixed;
    top: var(--nav-height);
    left: 0;
    width: 100%;
    height: calc(100vh - var(--nav-height));
    background: rgba(0, 0, 0, 0.5);
    z-index: 998;
    opacity: 0;
    transition: opacity var(--transition-normal);
  }

  .nav-overlay.active {
    display: block;
    opacity: 1;
  }

  body.menu-open {
    overflow: hidden;
  }

  .nav-more-dropdown {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    box-shadow: none;
    background: transparent;
    padding: 0;
  }

  /* Banner */
  .banner {
    height: 260px;
  }

  .banner-title-zh {
    font-size: 28px;
  }

  .banner-title-en {
    font-size: 22px;
  }

  .banner-small {
    height: 180px;
  }

  /* 栏目卡片：3 列 */
  .category-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-sm);
  }

  /* 布局：单列 + 侧边栏移到下方 */
  .page-layout {
    flex-direction: column;
  }

  .page-sidebar {
    width: 100%;
  }

  /* 文章列表 */
  .article-list-item {
    flex-direction: row;
  }

  .article-list-thumb {
    width: 200px;
    height: 112px;
  }

  /* 相关推荐 */
  .related-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* ----------------------------------------------------------
   移动端（<768px）
   ---------------------------------------------------------- */
@media (max-width: 767px) {
  /* 版心 */
  .container {
    padding: 0 15px;
  }

  /* 导航：汉堡菜单 */
  .main-nav {
    display: none;
  }

  .hamburger-btn {
    display: flex;
  }

  .site-brand-text {
    font-size: var(--text-h4);
  }

  /* 移动端菜单展开 */
  .main-nav.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: var(--bg-card);
    box-shadow: var(--shadow-hover);
    padding: var(--spacing-md);
    gap: var(--spacing-sm);
    z-index: 99;
  }

  .nav-more-dropdown {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    box-shadow: none;
    background: transparent;
    padding: 0;
  }

  /* Banner */
  .banner {
    height: 200px;
    margin: var(--spacing-md) 0;
  }

  .banner-title-zh {
    font-size: 24px;
  }

  .banner-title-en {
    font-size: 18px;
  }

  .banner-tagline {
    font-size: var(--text-tiny);
  }

  .banner-small {
    height: 160px;
  }

  .banner-small .banner-title-zh {
    font-size: 20px;
  }

  .banner-small .banner-title-en {
    font-size: 16px;
  }

  /* 栏目卡片：1 列 */
  .category-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-sm);
  }

  .category-card {
    padding: var(--spacing-md);
  }

  /* 布局：单列堆叠 */
  .page-layout {
    flex-direction: column;
  }

  .page-sidebar {
    width: 100%;
  }

  /* 文章列表：无缩略图 */
  .article-list-item {
    flex-direction: column;
  }

  .article-list-thumb {
    width: 100%;
    height: 160px;
  }

  /* 分页：紧凑 */
  .pagination a,
  .pagination span {
    min-width: 32px;
    height: 32px;
    font-size: var(--text-tiny);
    padding: 0 var(--spacing-xs);
  }

  /* 搜索页 */
  .search-box {
    flex-direction: column;
  }

  .search-submit {
    width: 100%;
  }

  /* 文章详情页 */
  .article-title {
    font-size: var(--text-h3);
  }

  .article-body-card {
    padding: var(--spacing-md);
  }

  .article-nav {
    flex-direction: column;
  }

  /* 相关推荐：单列 */
  .related-grid {
    grid-template-columns: 1fr;
  }

  /* 侧边栏 */
  .sidebar-module {
    padding: var(--spacing-sm);
  }

  /* 页脚 */
  .site-footer {
    border-top-left-radius: 0;
    border-top-right-radius: 0;
  }

  .footer-name {
    font-size: var(--text-small);
  }
}

/* ----------------------------------------------------------
   桌面端（>1200px）显式样式
   ---------------------------------------------------------- */
@media (min-width: 1201px) {
  .hamburger-btn {
    display: none;
  }

  .main-nav {
    display: flex;
  }
}