/* ============================================================
   WLinfoBlue - Layout Styles
   页面布局结构
   ============================================================ */

/* ----------------------------------------------------------
   主布局（内容 + 侧边栏）
   ---------------------------------------------------------- */
.page-layout {
  display: flex;
  gap: var(--spacing-md);
  margin-top: var(--spacing-lg);
}

.page-main {
  flex: 1;
  min-width: 0;
}

.page-sidebar {
  width: var(--sidebar-width);
  flex-shrink: 0;
  position: sticky;
  top: calc(var(--nav-height) + var(--spacing-md));
  max-height: calc(100vh - var(--nav-height) - var(--spacing-lg));
  overflow-y: auto;
  scrollbar-width: thin;
}

.page-sidebar::-webkit-scrollbar {
  width: 4px;
}

.page-sidebar::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: 2px;
}

.page-sidebar::-webkit-scrollbar-track {
  background: transparent;
}

/* ----------------------------------------------------------
   导航栏
   ---------------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--bg-card);
  box-shadow: 0 1px 4px var(--border-light);
  height: var(--nav-height);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

/* 左侧：站点 Logo + 名称 */
.site-brand {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  flex-shrink: 0;
}

.site-brand-logo {
  height: 32px;
  width: 32px;
  border-radius: var(--radius-sm);
  object-fit: cover;
}

.site-brand-text {
  font-size: var(--text-h4);
  font-weight: var(--font-bold);
  color: var(--primary);
}

/* 中间：主导航 */
.main-nav {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.nav-link {
  font-size: var(--text-small);
  font-weight: var(--font-normal);
  color: var(--text-primary);
  padding: var(--spacing-xs) 0;
  transition: color var(--transition-fast);
  white-space: nowrap;
}

.nav-link:hover,
.nav-link.active {
  color: var(--primary);
}

/* "更多"下拉菜单 */
.nav-more {
  position: relative;
}

.nav-more-trigger {
  font-size: var(--text-small);
  font-weight: var(--font-normal);
  color: var(--text-primary);
  padding: var(--spacing-xs) 0;
  cursor: pointer;
  transition: color var(--transition-fast);
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-more-trigger:hover {
  color: var(--primary);
}

.nav-more-trigger::after {
  content: '';
  display: inline-block;
  width: 0;
  height: 0;
  border-left: 4px solid transparent;
  border-right: 4px solid transparent;
  border-top: 5px solid currentColor;
  transition: transform var(--transition-fast);
}

.nav-more:hover .nav-more-trigger::after {
  transform: rotate(180deg);
}

.nav-more-dropdown {
  position: absolute;
  top: 100%;
  left: 0;
  background: var(--bg-card);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-hover);
  padding: var(--spacing-sm) 0;
  min-width: 160px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(4px);
  transition: all var(--transition-fast);
}

.nav-more:hover .nav-more-dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.nav-more-dropdown a {
  display: block;
  padding: var(--spacing-xs) var(--spacing-md);
  font-size: var(--text-small);
  color: var(--text-primary);
  transition: all var(--transition-fast);
}

.nav-more-dropdown a:hover {
  background: var(--primary-light);
  color: var(--primary);
}

/* 右侧：搜索 + 语言切换 */
.header-actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  flex-shrink: 0;
}

.search-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  transition: background var(--transition-fast);
}

.search-btn:hover {
  background: var(--primary-light);
}

.search-btn svg {
  width: 18px;
  height: 18px;
  color: var(--text-secondary);
}

/* 汉堡菜单按钮 */
.hamburger-btn {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 36px;
  height: 36px;
  gap: 5px;
}

.hamburger-btn span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--text-primary);
  transition: all var(--transition-fast);
}

.hamburger-btn.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.hamburger-btn.active span:nth-child(2) {
  opacity: 0;
}

.hamburger-btn.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* ----------------------------------------------------------
   Banner 横幅
   ---------------------------------------------------------- */
.banner {
  margin: var(--spacing-lg) 0;
  height: 320px;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-soft);
  overflow: hidden;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-primary);
}

.banner::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(
    ellipse at center,
    rgba(123, 167, 217, 0.08) 0%,
    rgba(250, 249, 247, 0) 70%
  );
  pointer-events: none;
}

/* 科技纹理 */
.banner::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image:
    linear-gradient(rgba(123, 167, 217, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(123, 167, 217, 0.03) 1px, transparent 1px);
  background-size: 40px 40px;
  opacity: 0.4;
  pointer-events: none;
}

.banner-content {
  position: relative;
  z-index: 1;
  text-align: center;
}

.banner-title-zh {
  font-size: var(--text-h1);
  font-weight: var(--font-bold);
  color: var(--primary);
  margin-bottom: var(--spacing-sm);
}

.banner-title-en {
  font-size: var(--text-h2);
  font-weight: var(--font-normal);
  color: var(--text-secondary);
  margin-bottom: var(--spacing-sm);
  font-family: 'Inter', sans-serif;
}

.banner-tagline {
  font-size: var(--text-small);
  color: var(--text-tertiary);
  font-weight: var(--font-thin);
}

/* 栏目页小 Banner */
.banner-small {
  height: 200px;
}

.banner-small .banner-title-zh {
  font-size: var(--text-h2);
}

.banner-small .banner-title-en {
  font-size: var(--text-h3);
}

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

/* ----------------------------------------------------------
   六大栏目网格
   ---------------------------------------------------------- */
.category-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-md);
  margin: var(--spacing-lg) 0;
}

.category-card {
  background: var(--bg-card);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-soft);
  padding: var(--spacing-lg);
  text-align: center;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
  display: block;
}

.category-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-hover);
  border: 1px solid rgba(123, 167, 217, 0.3);
}

.category-card-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto var(--spacing-sm);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
}

.category-icon-img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  border-radius: var(--radius-md);
  filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.1));
}

.category-card-title {
  font-size: var(--text-h3);
  font-weight: var(--font-semibold);
  color: var(--primary);
  margin-bottom: var(--spacing-xs);
}

.category-card-desc {
  font-size: var(--text-small);
  color: var(--text-tertiary);
  font-weight: var(--font-thin);
}

/* ----------------------------------------------------------
   分页组件
   ---------------------------------------------------------- */
.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-xs);
  margin-top: var(--spacing-lg);
}

.pagination a,
.pagination span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 36px;
  height: 36px;
  padding: 0 var(--spacing-sm);
  border-radius: var(--radius-sm);
  font-size: var(--text-small);
  color: var(--text-primary);
  background: var(--bg-card);
  box-shadow: var(--shadow-soft);
  transition: all var(--transition-fast);
}

.pagination a:hover {
  background: var(--primary-light);
  color: var(--primary);
}

.pagination .active {
  background: var(--primary);
  color: var(--text-inverse);
}

.pagination .disabled {
  opacity: 0.4;
  pointer-events: none;
}