/* ==========================================================================
   简洁科技风博客系统设计系统 - CSS 样式表
   域名: vpnstuijian.net | 主题色调: 金、白、灰、蓝灰、浅绿
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Outfit:wght@400;500;600;700;800&display=swap');

:root {
  /* Day Mode 配色 (参考图5) */
  --bg-primary: #f5f7fa;        /* 主背景：淡灰色 */
  --bg-secondary: #ffffff;      /* 卡片背景：纯白色 */
  --bg-tertiary: #e9ecf0;       /* 辅助底板色 */
  
  --text-primary: #2a2f35;      /* 文本主色：科技黑灰 */
  --text-secondary: #4a5568;    /* 文本副色 */
  --text-muted: #64748b;        /* 辅助/静音字 */
  
  --accent-primary: #0f52ba;    /* 主要品牌色：鲜艳皇室宝蓝 (Royal Cobalt Blue 参考图2) */
  --accent-secondary: #fdc500;  /* 二级强调色：鲜艳暖阳金黄 (Bright Gold) */
  --accent-gradient: linear-gradient(135deg, #0f52ba 0%, #1d4ed8 100%);
  --accent-gold-gradient: linear-gradient(135deg, #fdc500 0%, #f59e0b 100%);
  --accent-soft: rgba(15, 82, 186, 0.1);
  
  --success: #a1e38a;           /* 连通率/浅绿 */
  --success-soft: rgba(161, 227, 138, 0.12);
  --warning: #e5c46e;
  
  --border-color: #e2e8f0;
  --border-hover: #cbd5e1;
  
  --shadow-sm: 0 2px 4px 0 rgba(0, 0, 0, 0.02);
  --shadow-md: 0 4px 10px -2px rgba(130, 158, 201, 0.08), 0 2px 4px -1px rgba(0, 0, 0, 0.02);
  --shadow-lg: 0 10px 25px -5px rgba(130, 158, 201, 0.12);
  
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-full: 9999px;
  
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --header-height: 70px;
}

[data-theme="dark"] {
  /* Night Mode 配色 */
  --bg-primary: #12161f;        /* 主背景：科技深灰 */
  --bg-secondary: #1a1f2c;      /* 卡片背景：深蓝灰 */
  --bg-tertiary: #232a3b;
  
  --text-primary: #e6edf3;      /* 文本主色 */
  --text-secondary: #b1b9c5;    /* 文本副色 */
  --text-muted: #829ec9;
  
  --accent-primary: #a2bce6;    /* 提升夜间对比度 */
  --accent-secondary: #f3db98;
  --accent-gradient: linear-gradient(135deg, #1e2533 0%, #232a3b 100%);
  --accent-gold-gradient: linear-gradient(135deg, #f3db98 0%, #f9eac2 100%);
  --accent-soft: rgba(162, 188, 230, 0.12);
  
  --success: #a1e38a;
  --success-soft: rgba(161, 227, 138, 0.18);
  
  --border-color: #2b3346;
  --border-hover: #3e4963;
  
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.2);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4);
}

/* ==========================================================================
   基础排版与重置
   ========================================================================== */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-secondary);
  line-height: 1.625;
  transition: background-color var(--transition-normal), color var(--transition-normal);
  overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
  font-family: 'Outfit', sans-serif;
  color: var(--text-primary);
  font-weight: 700;
  line-height: 1.25;
  margin-bottom: 0.5em;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-fast), background-color var(--transition-fast);
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

button {
  cursor: pointer;
  border: none;
  background: none;
  font-family: inherit;
  outline: none;
}

/* 网页容器 */
.container {
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ==========================================================================
   头部导航栏 (含下拉菜单与暗黑模式切换)
   ========================================================================== */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-height);
  background-color: rgba(255, 255, 255, 0.82);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-color);
  transition: background-color var(--transition-normal), border-color var(--transition-normal);
}

[data-theme="dark"] .header {
  background-color: rgba(26, 31, 44, 0.82);
}

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

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.45rem;
  font-weight: 800;
  font-family: 'Outfit', sans-serif;
}

.logo span {
  background: linear-gradient(135deg, var(--text-primary) 30%, var(--accent-primary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

.logo-icon {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  object-fit: cover;
  flex-shrink: 0;
  border: 1px solid var(--border-color);
}

/* 导航链接 */
.nav {
  display: flex;
  align-items: center;
  gap: 6px;
}

.nav-link {
  font-size: 0.95rem;
  font-weight: 600;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 4px;
}

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

/* 下拉菜单结构 */
.nav-item {
  position: relative;
}

.dropdown-toggle svg {
  width: 12px;
  height: 12px;
  fill: currentColor;
  transition: transform var(--transition-fast);
}

.nav-item:hover .dropdown-toggle svg {
  transform: rotate(180deg);
}

.dropdown-menu {
  position: absolute;
  top: 100%;          /* 紧贴父级，无间隙 */
  left: 50%;
  transform: translateX(-50%) translateY(0);
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-lg);
  border-radius: var(--radius-md);
  padding: 8px 0;     /* 视觉上下内边距 */
  padding-top: 12px;  /* 顶部内撑，替代间隙 */
  min-width: 170px;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-fast), visibility var(--transition-fast);
  z-index: 101;
  /* 用伪元素桥接 hover 区域，防止鼠标移入时断连 */
  pointer-events: none;
}

/* 伪元素：在菜单顶部创建不可见的 hover 缓冲桥接区 */
.dropdown-menu::before {
  content: '';
  position: absolute;
  top: -8px;   /* 往上延伸覆盖导航项与菜单之间的空隙 */
  left: 0;
  right: 0;
  height: 8px;
}

.nav-item:hover .dropdown-menu,
.nav-item.open .dropdown-menu {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

.dropdown-item {
  display: block;
  padding: 8px 20px;
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text-secondary);
  white-space: nowrap;
}

.dropdown-item:hover {
  background-color: var(--accent-soft);
  color: var(--accent-primary);
}

/* 汉堡包菜单 */
.menu-toggle {
  display: none;
  font-size: 1.4rem;
  color: var(--text-primary);
  padding: 4px;
}

/* ==========================================================================
   伸缩搜索框与切换控制
   ========================================================================== */
.nav-search-container {
  position: relative;
  display: flex;
  align-items: center;
  margin-left: 12px;
}

.nav-search-input {
  width: 140px;
  padding: 6px 12px 6px 32px;
  border-radius: var(--radius-full);
  border: 1px solid var(--border-color);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-size: 0.85rem;
  outline: none;
  transition: width var(--transition-normal), border-color var(--transition-fast);
}

.nav-search-input:focus {
  width: 220px;
  border-color: var(--accent-primary);
  background-color: var(--bg-secondary);
}

.nav-search-icon {
  position: absolute;
  left: 10px;
  top: 50%;
  transform: translateY(-50%);
  width: 14px;
  height: 14px;
  color: var(--text-muted);
  pointer-events: none;
}

/* 热门搜索气泡 */
.hot-search-popup {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  width: 250px;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  padding: 12px 16px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: opacity var(--transition-fast), transform var(--transition-fast), visibility var(--transition-fast);
  z-index: 105;
}

.nav-search-input:focus + .hot-search-popup,
.hot-search-popup:hover {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.hot-search-title {
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--text-primary);
  display: block;
  margin-bottom: 8px;
}

.hot-search-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.hot-tag {
  font-size: 0.72rem;
  padding: 4px 8px;
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.hot-tag:hover {
  background-color: var(--accent-soft);
  color: var(--accent-primary);
  border-color: var(--accent-primary);
}

/* 主题切换开关 */
.theme-toggle {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  border: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-primary);
  margin-left: 10px;
  transition: all var(--transition-fast);
}

.theme-toggle:hover {
  background-color: var(--accent-soft);
  border-color: var(--accent-primary);
}

.theme-toggle svg {
  width: 18px;
  height: 18px;
}

.theme-toggle .sun-icon { display: block; }
.theme-toggle .moon-icon { display: none; }

[data-theme="dark"] .theme-toggle .sun-icon { display: none; }
[data-theme="dark"] .theme-toggle .moon-icon { display: block; }

/* ==========================================================================
   三栏网页框架
   ========================================================================== */
.main-layout {
  display: grid;
  grid-template-columns: 1fr 320px !important;
  align-items: start !important;
  gap: 24px;
  padding: 30px 0 60px;
}

/* ==========================================================================
   左侧边栏 (Blogger Info, Nav list, Category, Tags)
   ========================================================================== */
.left-sidebar {
  display: flex;
  flex-direction: column;
  align-self: start !important;
  gap: 20px;
  grid-column: 2;
  grid-row: 1;
}

.middle-content, .article-content-container {
  grid-column: 1;
  grid-row: 1;
}

.sidebar-card {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 20px;
  box-shadow: var(--shadow-sm);
}

/* 个人名片 */
.profile-card {
  text-align: center;
}

.profile-avatar {
  width: 80px;
  height: 80px;
  border-radius: var(--radius-full);
  margin: 0 auto 16px;
  border: 2px solid var(--accent-primary);
  padding: 3px;
  background-color: var(--bg-secondary);
  overflow: hidden;
}

.profile-avatar svg {
  width: 100%;
  height: 100%;
  fill: var(--accent-primary); opacity: 0.8;
}

.profile-name {
  font-size: 1.2rem;
  font-weight: 800;
  margin-bottom: 4px;
  color: var(--text-primary);
}

.profile-motto {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 16px;
  line-height: 1.5;
}

.profile-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--border-color);
  padding-top: 16px;
  margin-bottom: 16px;
}

.stat-item {
  display: flex;
  flex-direction: column;
}

.stat-value {
  font-family: 'Outfit', sans-serif;
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
}

.stat-label {
  font-size: 0.72rem;
  color: var(--text-secondary);
}

.profile-buttons {
  display: flex;
  gap: 8px;
}

.profile-btn {
  flex: 1;
  font-size: 0.8rem;
  font-weight: 600;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  text-align: center;
  border: 1px solid var(--border-color);
  transition: all var(--transition-fast);
}

.profile-btn-primary {
  background-color: var(--accent-soft);
  color: var(--accent-primary);
  border: 1px solid transparent;
}

.profile-btn-primary:hover {
  background-color: var(--accent-primary);
  color: #ffffff;
}

.profile-btn-secondary {
  background-color: var(--bg-primary);
  color: var(--text-primary);
}

.profile-btn-secondary:hover {
  border-color: var(--accent-primary);
  color: var(--accent-primary);
}

/* 分类树形手风琴 */
.category-accordion {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.accordion-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  background-color: var(--bg-primary);
  cursor: pointer;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-primary);
  transition: background-color var(--transition-fast);
}

.accordion-header:hover {
  background-color: var(--accent-soft);
  color: var(--accent-primary);
}

.accordion-header.active {
  background-color: var(--accent-primary);
  color: #ffffff;
}

.accordion-header.active svg {
  transform: rotate(90deg);
}

.accordion-header svg {
  width: 12px;
  height: 12px;
  fill: currentColor;
  transition: transform var(--transition-fast);
}

.accordion-content {
  display: none;
  flex-direction: column;
  padding-left: 16px;
  margin: 4px 0 8px;
  gap: 4px;
}

.accordion-item {
  font-size: 0.82rem;
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.accordion-item:hover {
  background-color: var(--accent-soft);
  color: var(--accent-primary);
}

.accordion-count {
  font-size: 0.72rem;
  background-color: var(--border-color);
  color: var(--text-secondary);
  padding: 1px 6px;
  border-radius: var(--radius-full);
}

/* 标签云 */
.tags-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.tag-pill {
  font-size: 0.78rem;
  padding: 5px 10px;
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

.tag-pill:hover, .tag-pill.active {
  background-color: var(--accent-soft);
  color: var(--accent-primary);
  border-color: var(--accent-primary);
}

/* ==========================================================================
   中间核心内容区 (机场推荐模块 + 文章流卡片)
   ========================================================================== */
.middle-content {
  display: flex;
  flex-direction: column;
  gap: 28px;
}

/* 面包屑导航 */
.breadcrumbs {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.82rem;
  color: var(--text-muted);
}

.breadcrumbs a:hover {
  color: var(--accent-primary);
}

/* 机场推荐大模块 */
.section-title-wrap {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 2px solid var(--border-color);
  padding-bottom: 10px;
  margin-bottom: 16px;
}

.section-title {
  font-size: 1.3rem;
  font-weight: 800;
  display: flex;
  align-items: center;
  gap: 8px;
}

.section-title::before {
  content: '';
  display: inline-block;
  width: 4px;
  height: 18px;
  background: var(--accent-gradient);
  border-radius: var(--radius-full);
}

.airport-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-bottom: 12px;
}

.airport-card {
  background-color: transparent;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 20px;
  box-shadow: none;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
  overflow: hidden;
  transition: background-color var(--transition-fast), border-color var(--transition-fast);
  min-height: 220px;
}

.airport-card:hover {
  background-color: var(--bg-tertiary);
  border-color: var(--border-hover);
  transform: none;
  box-shadow: none;
}

/* 移除渐变装饰条以保持极简 */
.airport-card::after {
  display: none;
}
.airport-card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 12px;
}

.airport-name {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--text-primary);
}

.airport-badge {
  font-size: 0.72rem;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  background-color: var(--accent-soft);
  color: var(--accent-primary);
}

.airport-card.recommended .airport-badge {
  background-color: rgba(229, 196, 110, 0.15);
  color: #d4a737;
}

.airport-features {
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-bottom: 16px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.airport-feature-item {
  display: flex;
  align-items: center;
  gap: 6px;
}


.airport-feature-item svg {
  width: 12px;
  height: 12px;
  fill: var(--accent-primary); opacity: 0.8;
}

/* 微测速图表 */
.mini-chart {
  display: flex;
  align-items: flex-end;
  height: 40px;
  gap: 4px;
  margin-bottom: 16px;
  border-bottom: 1px dashed var(--border-color);
  padding-bottom: 4px;
}

.chart-bar {
  flex: 1;
  background-color: var(--bg-tertiary);
  border-radius: var(--radius-full) var(--radius-full) 0 0;
  height: 10%;
  position: relative;
  transform-origin: bottom;
  animation: liveTraffic 2.2s ease-in-out infinite alternate;
}

.chart-bar.fill {
  background: var(--accent-gradient);
}

.chart-bar.fill-high {
  background: linear-gradient(180deg, #10b981 0%, #059669 100%);
  box-shadow: 0 0 6px rgba(16, 185, 129, 0.3);
}

/* Delaying animation to create organic fluctuating wave */
.chart-bar:nth-child(7n+1) { animation-delay: 0.1s; }
.chart-bar:nth-child(7n+2) { animation-delay: 0.3s; }
.chart-bar:nth-child(7n+3) { animation-delay: 0.5s; }
.chart-bar:nth-child(7n+4) { animation-delay: 0.2s; }
.chart-bar:nth-child(7n+5) { animation-delay: 0.4s; }
.chart-bar:nth-child(7n+6) { animation-delay: 0.15s; }
.chart-bar:nth-child(7n+7) { animation-delay: 0.35s; }

@keyframes liveTraffic {
  0% { transform: scaleY(0.95); }
  50% { transform: scaleY(1.03); }
  100% { transform: scaleY(0.97); }
}

.chart-bar-tooltip {
  position: absolute;
  bottom: 100%;
  left: 50%;
  transform: translateX(-50%) translateY(-4px);
  background-color: var(--text-primary);
  color: var(--bg-secondary);
  font-size: 0.65rem;
  padding: 2px 4px;
  border-radius: var(--radius-sm);
  white-space: nowrap;
  opacity: 0;
  transition: opacity var(--transition-fast);
  pointer-events: none;
}

.chart-bar:hover .chart-bar-tooltip {
  opacity: 1;
}

.airport-actions {
  display: flex;
  gap: 8px;
}

.airport-btn {
  flex: 1;
  font-size: 0.78rem;
  font-weight: 700;
  padding: 8px 4px;
  border-radius: var(--radius-sm);
  text-align: center;
  transition: all var(--transition-fast);
}

.airport-btn-review {
  background-color: var(--bg-tertiary);
  color: var(--text-secondary);
  border: 1px solid transparent;
}

.airport-btn-review:hover {
  background-color: var(--border-color);
  color: var(--text-primary);
}

.airport-btn-link {
  background-color: var(--accent-soft);
  color: var(--accent-primary);
  border: 1px solid transparent;
}

.airport-btn-link:hover {
  background-color: var(--accent-primary);
  color: #ffffff;
}

/* ==========================================================================
   文章信息卡片流
   ========================================================================== */
.articles-feed {
  display: flex;
  flex-direction: column;
  gap: 20px;
}


.article-card {
  position: relative;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
  background-color: transparent;
  border: none;
  border-bottom: 1px solid var(--border-color);
  border-radius: 0;
  padding: 20px 24px;
  box-shadow: none;
  transition: background-color var(--transition-fast);
}

.article-card:hover {
  background-color: var(--bg-tertiary);
  transform: none;
  border-color: var(--border-color);
  box-shadow: none;
  cursor: pointer;
}

.article-card:hover .article-card-title a {
  color: var(--accent-primary);
}

.article-card-cover {
  width: 200px;
  height: 130px;
  border-radius: var(--radius-sm);
  background-color: var(--bg-tertiary);
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  font-family: 'Outfit', sans-serif;
  font-size: 1.15rem;
  font-weight: 800;
  border: 1px solid var(--border-color);
  overflow: hidden;
  text-align: center;
  padding: 10px;
}

.article-card-content {
  display: flex;
  flex-direction: column;
  justify-content: center;
  flex: 1;
}

.article-card-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.article-card-title {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 6px;
  line-height: 1.4;
}

.article-card-title a {
  color: var(--text-primary);
  text-decoration: none;
}

.article-card-title a::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 5;
}

.article-card-title a:hover {
  color: var(--accent-primary);
}

.article-card-excerpt {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 12px;
}

.article-card-footer {
  display: flex;
  align-items: center;
  gap: 12px;
}
.article-card-tags {
  display: flex;
  gap: 6px;
}

.read-more-link {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--accent-primary);
  display: flex;
  align-items: center;
  gap: 4px;
}

.read-more-link:hover {
  color: var(--text-primary);
}

.read-more-link svg {
  width: 14px;
  height: 14px;
  fill: currentColor;
}

/* 过滤提示 */
.filter-info-card {
  background-color: var(--accent-soft);
  border: 1px solid var(--accent-primary);
  border-radius: var(--radius-md);
  padding: 14px 20px;
  display: none;
  justify-content: space-between;
  align-items: center;
  font-size: 0.88rem;
  color: var(--text-primary);
  font-weight: 600;
}

.clear-filter-btn {
  font-size: 0.8rem;
  text-decoration: underline;
  color: var(--accent-primary);
}

/* 空列表显示 */
.empty-list-indicator {
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 60px 0;
  background-color: var(--bg-secondary);
  border: 1px dashed var(--border-color);
  border-radius: var(--radius-md);
  text-align: center;
}

.empty-list-indicator svg {
  width: 48px;
  height: 48px;
  stroke: var(--text-muted);
  fill: none;
  stroke-width: 1.5;
  margin-bottom: 12px;
}

/* ==========================================================================
   右侧边栏 (Popular posts, static categories)
   ========================================================================== */
.right-sidebar {
  display: none !important;
  flex-direction: column;
  align-self: start !important;
  gap: 20px;
}

/* 侧边小文章组件 */
.mini-article-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.mini-article-item {
  display: flex;
  gap: 12px;
  align-items: flex-start;
}

.mini-article-index {
  width: 24px;
  height: 24px;
  border-radius: var(--radius-sm);
  background-color: var(--bg-tertiary);
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.78rem;
  font-weight: 700;
  flex-shrink: 0;
}

.mini-article-item:nth-child(1) .mini-article-index {
  background-color: #f3db98;
  color: #8f6d1b;
}

.mini-article-item:nth-child(2) .mini-article-index {
  background-color: #cbd5e1;
  color: #475569;
}

.mini-article-item:nth-child(3) .mini-article-index {
  background-color: #e2e8f0;
  color: #64748b;
}

.mini-article-content {
  display: flex;
  flex-direction: column;
}

.mini-article-title {
  font-size: 0.85rem;
  font-weight: 600;
  line-height: 1.35;
  margin-bottom: 2px;
  color: var(--text-primary);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.mini-article-title:hover {
  color: var(--accent-primary);
}

.mini-article-date {
  font-size: 0.72rem;
  color: var(--text-muted);
}

/* ==========================================================================
   文章详情页特殊元素 (TOC 目录, 正文排版)
   ========================================================================== */
/* 浮动/固定目录栏 */
.toc-card {
  max-height: calc(100vh - var(--header-height) - 60px);
  overflow-y: auto;
}

.toc-title {
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 12px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-primary);
}

.toc-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-size: 0.85rem;
  border-left: 2px solid var(--border-color);
}

.toc-link {
  padding-left: 12px;
  color: var(--text-secondary);
  display: block;
  transition: all var(--transition-fast);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.toc-link:hover, .toc-link.active {
  color: var(--accent-primary);
  font-weight: 600;
}

.toc-link.active {
  border-left: 2px solid var(--accent-primary);
  margin-left: -2px;
  padding-left: 12px;
}

.toc-link.depth-3 {
  padding-left: 24px;
}

.toc-link.depth-3.active {
  padding-left: 24px;
}

/* ==========================================================================
   文章正文样式排版
   ========================================================================== */
.article-page-layout {
  grid-template-columns: 260px 1fr 280px;
}

.article-content-container {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 36px 40px;
  box-shadow: var(--shadow-sm);
}

.article-title-large {
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: 16px;
  color: var(--text-primary);
  line-height: 1.3;
}

.article-detail-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 0.85rem;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 20px;
  margin-bottom: 28px;
}

.article-detail-meta span {
  display: flex;
  align-items: center;
  gap: 4px;
}

.article-body {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.75;
}

.article-body p {
  margin-bottom: 1.5em;
  text-align: justify;
}

.article-body h2 {
  font-size: 1.45rem;
  font-weight: 700;
  margin-top: 1.8em;
  margin-bottom: 0.8em;
  color: var(--text-primary);
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 6px;
}

.article-body h3 {
  font-size: 1.2rem;
  font-weight: 700;
  margin-top: 1.5em;
  margin-bottom: 0.6em;
  color: var(--text-primary);
}

.article-body blockquote {
  padding: 16px 20px;
  border-left: 4px solid var(--accent-primary);
  background-color: var(--bg-primary);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: 20px 0;
  font-style: italic;
  color: var(--text-primary);
}

.article-body blockquote p {
  margin-bottom: 0;
}

/* 详情页高频表格 */
.article-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 24px 0;
  font-size: 0.9rem;
}

.article-body th, .article-body td {
  padding: 12px 16px;
  border: 1px solid var(--border-color);
  text-align: left;
}

.article-body th {
  background-color: var(--bg-primary);
  font-weight: 700;
  color: var(--text-primary);
}

.article-body tr:nth-child(even) td {
  background-color: rgba(130, 158, 201, 0.02);
}

/* 科技风列表 */
.article-body ul, .article-body ol {
  margin: 16px 0 24px 20px;
}

.article-body ul {
  list-style-type: square;
}

.article-body li {
  margin-bottom: 6px;
}

/* 内嵌测评推荐卡 */
.embedded-cta-box {
  background: linear-gradient(135deg, var(--bg-primary) 0%, rgba(130, 158, 201, 0.05) 100%);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
  margin: 28px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.cta-text {
  flex: 1;
}

.cta-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.cta-desc {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.cta-btn {
  background-color: #f97316;
  color: #ffffff !important;
  font-weight: 700;
  padding: 10px 24px;
  border-radius: var(--radius-sm);
  white-space: nowrap;
  font-size: 0.9rem;
  box-shadow: none;
  border: 1px solid transparent;
  transition: all var(--transition-fast);
}

.cta-btn:hover {
  background-color: #ea580c;
  color: #ffffff !important;
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

/* 详情页底部导航 */
.article-post-navigation {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin-top: 40px;
  border-top: 1px solid var(--border-color);
  padding-top: 24px;
}

.post-nav-card {
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 16px;
  display: flex;
  flex-direction: column;
  transition: border-color var(--transition-fast);
}

.post-nav-card:hover {
  border-color: var(--accent-primary);
}

.post-nav-card.next {
  text-align: right;
}

.post-nav-label {
  font-size: 0.72rem;
  color: var(--text-muted);
  text-transform: uppercase;
  font-weight: 700;
  margin-bottom: 4px;
}

.post-nav-title {
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--text-primary);
  display: -webkit-box;
  -webkit-line-clamp: 1;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ==========================================================================
   文章归档页面样式
   ========================================================================== */
.archive-year-section {
  margin-bottom: 30px;
}

.archive-year-header {
  display: flex;
  align-items: center;
  gap: 12px;
  border-bottom: 2px solid var(--border-color);
  padding-bottom: 8px;
  margin-bottom: 16px;
}

.archive-year-title {
  font-family: 'Outfit', sans-serif;
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--text-primary);
}

.archive-year-count {
  font-size: 0.8rem;
  background-color: var(--accent-soft);
  color: var(--accent-primary);
  padding: 2px 8px;
  border-radius: var(--radius-full);
  font-weight: 600;
}

.archive-items-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.archive-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 20px;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.archive-item:hover {
  border-color: var(--accent-primary);
  transform: translateX(4px);
}

.archive-item-title {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
}

.archive-item-date {
  font-family: 'Outfit', sans-serif;
  font-size: 0.8rem;
  color: var(--text-muted);
  flex-shrink: 0;
  margin-left: 15px;
}

/* ==========================================================================
   页脚
   ========================================================================== */
.footer {
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: 40px 0 30px;
  transition: background-color var(--transition-normal), border-color var(--transition-normal);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 32px;
  margin-bottom: 30px;
}

.footer-brand-title {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 12px;
}

.footer-brand p {
  font-size: 0.85rem;
  line-height: 1.6;
  color: var(--text-secondary);
}

.footer-links-title {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 16px;
}

.footer-links-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-link {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.footer-link:hover {
  color: var(--accent-primary);
}

.footer-bottom {
  border-top: 1px solid var(--border-color);
  padding-top: 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.footer-bottom-links {
  display: flex;
  gap: 16px;
}

/* ==========================================================================
   自适应响应式设计 (Responsive Design)
   ========================================================================== */
@media (max-width: 1200px) {
  .main-layout {
    grid-template-columns: 1fr 240px !important;
  }
  .right-sidebar {
    display: none; /* 平板及以下隐藏右边栏 */
  }
  .article-page-layout {
    grid-template-columns: 1fr 240px !important;
  }
}

@media (max-width: 992px) {
  .airport-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .menu-toggle {
    display: block; /* 显示手机版汉堡包菜单 */
  }
  
  .nav {
    position: fixed;
    top: var(--header-height);
    left: -100%;
    width: 260px;
    height: calc(100vh - var(--header-height));
    background-color: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
    flex-direction: column;
    align-items: flex-start;
    padding: 24px;
    gap: 12px;
    transition: left var(--transition-normal);
    z-index: 100;
  }
  
  .nav.active {
    left: 0;
  }

  .nav-search-container {
    margin-left: 0;
    margin-top: 12px;
    width: 100%;
  }

  .nav-search-input {
    width: 100% !important;
  }
  
  .main-layout {
    grid-template-columns: 1fr !important; /* 手机端单栏展示 */
  }
  
  .left-sidebar {
    display: none; /* 手机端主页侧边栏收起，可从抽屉调出或在尾部 */
  }
  
  .airport-grid {
    grid-template-columns: 1fr;
  }
  
  .article-card {
    flex-direction: column; /* 封面图与内容上下排布 */
  }
  
  .article-card-cover {
    width: 100%;
    height: 150px;
  }
  
  .article-content-container {
    padding: 20px;
  }

  .article-title-large {
    font-size: 1.5rem;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .footer-bottom {
    flex-direction: column;
    gap: 12px;
    text-align: center;
  }
}

/* ==========================================================================
   侧边栏通用卡片容器 (sidebar-card)
   ========================================================================== */
.sidebar-card {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 20px;
  box-shadow: var(--shadow-sm);
}

/* 个人信息卡 (profile-card) */
.profile-card {
  text-align: center;
}

.profile-avatar {
  width: 80px;
  height: 80px;
  margin: 0 auto 12px;
}

.profile-avatar svg {
  width: 80px;
  height: 80px;
  border-radius: 50%;
}

.profile-name {
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 6px;
}

.profile-motto {
  font-size: 0.8rem;
  line-height: 1.5;
  color: var(--text-secondary);
  margin-bottom: 14px;
}

.profile-stats {
  display: flex;
  justify-content: space-around;
  padding: 12px 0;
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 14px;
}

.stat-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
}

.stat-value {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--accent-primary);
}

.stat-label {
  font-size: 0.7rem;
  color: var(--text-muted);
}

.profile-buttons {
  display: flex;
  gap: 8px;
  justify-content: center;
}

.profile-btn {
  font-size: 0.8rem;
  font-weight: 700;
  padding: 7px 14px;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
  flex: 1;
  text-align: center;
}

.profile-btn-primary {
  background-color: var(--accent-soft);
  color: var(--accent-primary);
  border: 1px solid transparent;
}

.profile-btn-primary:hover {
  background-color: var(--accent-primary);
  color: #ffffff;
}

.profile-btn-secondary {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

.profile-btn-secondary:hover {
  border-color: var(--accent-primary);
  color: var(--accent-primary);
}

/* ==========================================================================
   分类手风琴 (accordion)
   ========================================================================== */
.category-accordion {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.accordion-item-wrap {
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.accordion-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 14px;
  background-color: var(--bg-primary);
  cursor: pointer;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-primary);
  transition: background-color var(--transition-fast);
  user-select: none;
}

.accordion-header:hover {
  background-color: var(--bg-tertiary);
}

.accordion-header.active {
  color: var(--accent-primary);
}

.accordion-header svg {
  width: 16px;
  height: 16px;
  fill: currentColor;
  transition: transform var(--transition-fast);
}

.accordion-header.active svg {
  transform: rotate(90deg);
}

.accordion-content {
  display: none;
  flex-direction: column;
  background-color: var(--bg-secondary);
}

.accordion-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 16px;
  font-size: 0.84rem;
  color: var(--text-secondary);
  border-left: 2px solid transparent;
  transition: all var(--transition-fast);
  cursor: pointer;
}

.accordion-item:hover {
  border-left-color: var(--accent-primary);
  color: var(--accent-primary);
  background-color: var(--accent-soft);
}

.accordion-count {
  font-size: 0.72rem;
  font-weight: 700;
  background-color: var(--bg-tertiary);
  padding: 1px 6px;
  border-radius: var(--radius-full);
  color: var(--text-muted);
}

/* ==========================================================================
   文章详情页容器 (article-content-container)
   ========================================================================== */
.article-content-container {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 32px;
  box-shadow: var(--shadow-sm);
  min-width: 0; /* 防止 grid 子项内容溢出 */
}

.article-header {
  margin-bottom: 28px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border-color);
}

.article-title-large {
  font-size: 1.9rem;
  font-weight: 800;
  line-height: 1.2;
  color: var(--text-primary);
  margin-bottom: 12px;
}

.article-detail-meta {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  font-size: 0.82rem;
  color: var(--text-muted);
  padding-bottom: 16px;
  border-bottom: 1px dashed var(--border-color);
  margin-bottom: 0;
}

/* 文章正文 */
.article-body {
  line-height: 1.75;
  font-size: 0.95rem;
  color: var(--text-secondary);
}

.article-body h2 {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: 28px 0 12px;
  padding-left: 12px;
  border-left: 3px solid var(--accent-primary);
}

.article-body h3 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: 20px 0 10px;
}

.article-body p {
  margin-bottom: 16px;
}

.article-body ul, .article-body ol {
  margin: 0 0 16px 20px;
}

.article-body li {
  margin-bottom: 8px;
}

.article-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 16px 0;
  font-size: 0.88rem;
}

.article-body th, .article-body td {
  text-align: left;
  padding: 10px 14px;
  border: 1px solid var(--border-color);
}

.article-body th {
  background-color: var(--bg-primary);
  font-weight: 700;
  color: var(--text-primary);
}

.article-body blockquote {
  border-left: 3px solid var(--accent-secondary);
  background-color: rgba(229, 196, 110, 0.08);
  padding: 12px 16px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  color: var(--text-secondary);
  font-style: italic;
  margin: 16px 0;
}

.article-body a {
  color: var(--accent-primary);
  text-decoration: underline;
}

/* ==========================================================================
   嵌入式广告/CTA 推荐框 (embedded-cta-box)
   ========================================================================== */
.embedded-cta-box {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  box-sizing: border-box;
  width: 100%;
  background: linear-gradient(135deg, var(--bg-tertiary) 0%, var(--bg-secondary) 100%);
  border: 1.5px solid var(--accent-secondary);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  margin: 32px 0 0;
}
.cta-text { flex: 1 1 220px; min-width: 180px; }
.cta-title, .cta-desc { word-break: break-word; white-space: normal; }
.cta-btn { flex-shrink: 0; white-space: nowrap; }

.cta-text {
  flex: 1;
}

.cta-title {
  font-size: 1rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.cta-desc {
  font-size: 0.83rem;
  color: var(--text-secondary);
  line-height: 1.45;
}

.cta-btn {
  flex-shrink: 0;
  background-color: #f97316;
  color: #ffffff !important;
  border: 1px solid transparent;
  font-size: 0.85rem;
  font-weight: 700;
  padding: 10px 20px;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.cta-btn:hover {
  background-color: #ea580c;
  color: #ffffff !important;
}

/* 侧边栏 CTA 推荐框定制 */
.left-sidebar .embedded-cta-box {
  flex-direction: column;
  align-items: stretch;
  text-align: center;
  margin: 0;
  padding: 20px;
  gap: 14px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
}

.left-sidebar .embedded-cta-box .cta-text {
  flex: none;
  min-width: 0;
}

.left-sidebar .embedded-cta-box .cta-title {
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 6px;
  color: var(--accent-primary);
}

.left-sidebar .embedded-cta-box .cta-desc {
  font-size: 0.78rem;
  line-height: 1.5;
}

.left-sidebar .embedded-cta-box .cta-btn {
  align-self: center;
  width: 80%;
  text-align: center;
  padding: 8px 16px;
  font-size: 0.8rem;
  background-color: #f97316;
  color: #ffffff !important;
}

.left-sidebar .embedded-cta-box .cta-btn:hover {
  background-color: #ea580c;
  color: #ffffff !important;
}

/* ==========================================================================
   文章归档页 (archives)
   ========================================================================== */
.archive-year-section {
  margin-bottom: 28px;
}

.archive-year-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: 8px;
  margin-bottom: 12px;
  border-bottom: 2px solid var(--accent-primary);
}

.archive-year-title {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--accent-primary);
}

.archive-year-count {
  font-size: 0.8rem;
  color: var(--text-muted);
  background-color: var(--bg-tertiary);
  padding: 2px 8px;
  border-radius: var(--radius-full);
}

.archive-items-list {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.archive-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 0;
  border-bottom: 1px dashed var(--border-color);
}

.archive-item-title {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-secondary);
  flex: 1;
  padding-right: 12px;
}

.archive-item-title:hover {
  color: var(--accent-primary);
}

.archive-item-date {
  font-size: 0.78rem;
  color: var(--text-muted);
  flex-shrink: 0;
}

/* ==========================================================================
   导航栏搜索下拉框 (nav-search popup)
   ========================================================================== */
.nav-search-container {
  display: flex;
  align-items: center;
  position: relative;
  gap: 8px;
}

.nav-search-icon {
  width: 18px;
  height: 18px;
  color: var(--text-muted);
}

.nav-search-input {
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
  padding: 6px 14px 6px 34px !important;
  font-size: 0.85rem;
  color: var(--text-primary);
  outline: none;
  width: 180px;
  transition: all var(--transition-fast);
}

.nav-search-input:focus {
  border-color: var(--accent-primary);
  width: 220px;
}

.hot-search-popup {
  position: absolute;
  top: calc(100% + 10px);
  left: 0;
  right: 0;
  min-width: 240px;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 12px;
  box-shadow: var(--shadow-lg);
  display: none;
  z-index: 1100;
}

.nav-search-input:focus ~ .hot-search-popup,
.nav-search-container:focus-within .hot-search-popup {
  display: block;
}

.hot-search-title {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--text-muted);
  display: block;
  margin-bottom: 8px;
}

.hot-search-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.hot-tag {
  font-size: 0.78rem;
  padding: 3px 8px;
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.hot-tag:hover {
  background-color: var(--accent-soft);
  border-color: var(--accent-primary);
  color: var(--accent-primary);
}

/* ==========================================================================
   导航栏下拉菜单 (.nav-item dropdown)
   ========================================================================== */
.nav-item {
  position: relative;
}

.nav-item .dropdown-menu {
  /* 第二处定义已合并至上方主块，此处仅覆盖 left 对齐（非居中） */
  left: 0;
  transform: none;
}

/* JS 控制时同样支持 .open 类 */
.nav-item.open .dropdown-menu {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

.dropdown-toggle svg {
  width: 16px;
  height: 16px;
  vertical-align: middle;
  fill: currentColor;
}

.dropdown-item {
  display: block;
  padding: 8px 16px;
  font-size: 0.88rem;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.dropdown-item:hover {
  background-color: var(--accent-soft);
  color: var(--accent-primary);
}

/* ==========================================================================
   响应式补充 (文章详情页)
   ========================================================================== */
.article-page-layout {
  grid-template-columns: 240px 1fr 220px;
}

@media (max-width: 1100px) {
  .article-page-layout {
    grid-template-columns: 220px 1fr;
  }

  .right-sidebar {
    display: none;
  }
}

@media (max-width: 768px) {
  .article-page-layout {
    grid-template-columns: 1fr;
  }

  .left-sidebar {
    display: none;
  }

  .embedded-cta-box {
    flex-direction: column;
    text-align: center;
  }

  .article-title-large {
    font-size: 1.4rem;
  }

  .article-content-container {
    padding: 20px;
  }
}

/* ==========================================================================
   文章列表分页导航 (pagination-nav)
   ========================================================================== */
.pagination-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 24px 0 8px;
  flex-wrap: wrap;
}

.page-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 38px;
  height: 38px;
  padding: 0 10px;
  border-radius: var(--radius-md);
  font-size: 0.88rem;
  font-weight: 600;
  font-family: 'Inter', sans-serif;
  cursor: pointer;
  border: 1px solid var(--border-color);
  background-color: var(--bg-secondary);
  color: var(--text-secondary);
  transition: all var(--transition-fast);
  user-select: none;
  box-shadow: var(--shadow-sm);
}

.page-btn:hover:not(:disabled) {
  border-color: var(--accent-primary);
  color: var(--accent-primary);
  background-color: var(--accent-soft);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.page-btn.active {
  background-color: var(--accent-primary);
  color: #ffffff;
  border-color: var(--accent-primary);
  box-shadow: 0 4px 12px rgba(130, 158, 201, 0.35);
  pointer-events: none;
}

.page-btn:disabled {
  opacity: 0.38;
  cursor: not-allowed;
  transform: none;
}

.page-btn-prev,
.page-btn-next {
  padding: 0 14px;
  font-size: 0.82rem;
  letter-spacing: 0.01em;
}

.page-dots {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 38px;
  color: var(--text-muted);
  font-weight: 700;
  letter-spacing: 0.1em;
  pointer-events: none;
  user-select: none;
}

/* ==========================================================================
   轮播图与卡片Logo样式 (Carousel & Card Logos)
   ========================================================================== */
.carousel-container {
  width: 100%;
  margin-bottom: 24px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border-color);
  background-color: var(--bg-secondary);
  position: relative;
}

.carousel-wrapper {
  position: relative;
  width: 100%;
  height: 180px;
  overflow: hidden;
}

.carousel-slides {
  position: relative;
  width: 100%;
  height: 100%;
}

.carousel-slide {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  z-index: 1;
  transition: opacity 0.8s ease-in-out, transform 0.8s ease-in-out;
  transform: scale(1.02);
  pointer-events: none;
}

.carousel-slide.active {
  opacity: 1;
  z-index: 2;
  transform: scale(1);
  pointer-events: auto;
}

.carousel-link {
  display: block;
  width: 100%;
  height: 100%;
  position: relative;
  text-decoration: none;
}

.carousel-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.carousel-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: transparent;
  z-index: 3;
}

.carousel-content {
  position: absolute;
  bottom: 20px;
  left: 24px;
  z-index: 4;
  max-width: 60%;
  background: transparent;
  border: none;
  box-shadow: none;
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
  padding: 0;
  pointer-events: auto;
}

.carousel-title-link {
  font-size: 0.92rem;
  font-weight: 700;
  color: #ffffff;
  text-shadow: 0 1px 5px rgba(0, 0, 0, 0.8);
  line-height: 1.3;
  display: inline-block;
  transition: opacity var(--transition-fast);
}

.carousel-title-link:hover {
  opacity: 0.85;
  color: #ffffff;
}

.carousel-desc {
  display: none !important;
}

/* 居中海报文字样式 */
.carousel-poster-content {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  z-index: 4;
  text-align: center;
  width: 90%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  pointer-events: none;
}

/* 各个海报的主题文字配色 (通过slide class精准定向) */

/* Slide 1: 选机场指南 — 浅米色背景，深字 */
.slide-airport .poster-main-title {
  color: #1a1a2e;
}
.slide-airport .poster-tag {
  background-color: #e67e22;
  color: #ffffff;
}
.slide-airport .poster-subtitle {
  color: #4a4a6a;
}

/* Slide 2: 极连云测评 — 浅粉背景，深字 */
.slide-jilianyun .poster-main-title {
  color: #1a1a2e;
}
.slide-jilianyun .poster-tag {
  background-color: #8b5cf6;
  color: #ffffff;
}
.slide-jilianyun .poster-subtitle {
  color: #4a4a6a;
}

/* Slide 3: 速界测评 — 青绿→海蓝渐变背景，深色字（如图二） */
.slide-sujie .poster-main-title {
  color: #0d1b2a !important;
  text-shadow: none;
  font-size: 2rem;
}
.slide-sujie .poster-tag {
  background-color: rgba(255, 255, 255, 0.25) !important;
  color: #ffffff !important;
  border: 1px solid rgba(255, 255, 255, 0.55);
  font-weight: 800;
}
.slide-sujie .poster-subtitle {
  color: #0d2137 !important;
  font-size: 0.85rem;
}

/* Slide 4: 物理专线 — 浅灰/奶油背景，深字（如图二）*/
.slide-iplc .poster-main-title {
  color: #1a1a2e;
}
.slide-iplc .poster-tag {
  background-color: #2563eb;
  color: #ffffff;
}
.slide-iplc .poster-subtitle {
  color: #4a4a6a;
}

.poster-tag {
  font-size: 0.72rem;
  font-weight: 700;
  padding: 2px 12px;
  border-radius: 20px;
  margin-bottom: 6px;
  letter-spacing: 0.05em;
  display: inline-block;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.03);
}

.poster-main-title {
  font-size: 1.7rem;
  font-weight: 900;
  margin: 0 0 4px 0;
  font-family: 'Outfit', sans-serif;
  letter-spacing: -0.02em;
}

.poster-subtitle {
  font-size: 0.82rem;
  color: #3a3a5c;
  font-weight: 500;
  margin: 0;
}

/* 导航按钮 */
.carousel-prev,
.carousel-next {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background-color: rgba(0, 0, 0, 0.35);
  border: 1px solid rgba(255, 255, 255, 0.15);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 5;
  transition: all var(--transition-fast);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
}

.carousel-prev {
  left: 20px;
}

.carousel-next {
  right: 20px;
}

.carousel-prev:hover,
.carousel-next:hover {
  background-color: var(--accent-primary);
  border-color: var(--accent-primary);
  box-shadow: 0 0 12px rgba(130, 158, 201, 0.5);
}

.carousel-prev svg,
.carousel-next svg {
  width: 24px;
  height: 24px;
  fill: currentColor;
}

/* 指示器 */
.carousel-indicators {
  position: absolute;
  bottom: 20px;
  right: 30px;
  display: flex;
  gap: 8px;
  z-index: 5;
}

.carousel-dot {
  width: 12px;
  height: 6px;
  border-radius: 3px;
  background-color: rgba(255, 255, 255, 0.4);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.carousel-dot.active {
  width: 24px;
  background-color: var(--accent-primary);
  box-shadow: 0 0 8px rgba(130, 158, 201, 0.6);
}

/* 卡片Logo样式 */
.airport-name-wrap {
  display: flex;
  align-items: center;
  gap: 10px;
}

.airport-card-logo {
  width: 52px;
  height: 52px;
  border-radius: 8px;
  object-fit: cover;
  border: 1px solid var(--border-color);
  background-color: #ffffff;
  flex-shrink: 0;
  box-shadow: var(--shadow-sm);
}

.airport-card-logo-fallback {
  width: 52px;
  height: 52px;
  border-radius: 8px;
  background-color: var(--accent-soft);
  color: var(--accent-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.2rem;
  border: 1px solid var(--border-color);
  flex-shrink: 0;
}

/* 响应式调整 */
@media (max-width: 768px) {
  .carousel-wrapper {
    height: 120px;
  }
  .carousel-content {
    display: block !important;
    bottom: 10px;
    left: 12px;
    max-width: 75%;
  }
  .carousel-title-link {
    font-size: 0.72rem;
  }
  .poster-main-title {
    font-size: 1.15rem;
  }
  .poster-subtitle {
    font-size: 0.65rem;
  }
  .poster-tag {
    font-size: 0.58rem;
    padding: 1px 8px;
    margin-bottom: 4px;
  }
  .carousel-prev,
  .carousel-next {
    width: 32px;
    height: 32px;
  }
  .carousel-prev svg,
  .carousel-next svg {
    width: 18px;
    height: 18px;
  }
  .carousel-prev {
    left: 10px;
  }
  .carousel-next {
    right: 10px;
  }
  .carousel-indicators {
    bottom: 12px;
    right: 15px;
  }
}

/* 机场推荐边栏定位卡片样式 */
.sidebar-promo-container {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.sidebar-promo-card {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 16px;
  border-radius: var(--radius-sm);
  text-decoration: none;
  transition: all var(--transition-fast);
  position: relative;
  overflow: hidden;
  box-shadow: none;
  border: 1px solid var(--border-color);
  background-color: var(--bg-secondary);
}

.sidebar-promo-card:hover {
  background-color: var(--bg-primary);
  border-color: var(--border-hover);
}

.promo-card-left {
  display: flex;
  flex-direction: column;
  gap: 4px;
  flex: 1;
  padding-right: 12px;
  z-index: 2;
}

.promo-card-title {
  font-size: 0.95rem;
  font-weight: 700;
  margin: 0;
  color: var(--text-primary);
}

.promo-card-desc {
  font-size: 0.75rem;
  margin: 0;
  line-height: 1.4;
  color: var(--text-secondary);
}

.promo-card-btn {
  align-self: flex-start;
  font-size: 0.7rem;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: 4px;
  margin-top: 6px;
  color: var(--accent-primary);
  background-color: var(--accent-soft);
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.sidebar-promo-card:hover .promo-card-btn {
  background-color: var(--accent-primary);
  color: #fff;
}
.promo-card-right {
  width: 50px;
  height: 50px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  z-index: 2;
}

.promo-card-logo {
  width: 100%;
  height: 100%;
  object-fit: contain;
  border-radius: 8px;
  background-color: #ffffff;
  padding: 4px;
  box-sizing: border-box;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.1);
}

/* Make the promo list widget sticky at the bottom of the right sidebar */
@media (min-width: 992px) {
  .promo-list-widget {
    position: sticky;
    top: 80px; /* Sticks nicely when scrolling */
    z-index: 10;
  }
}


/* 调整文章页两栏侧边栏 */
.article-page-layout {
  grid-template-columns: 1fr 320px !important;
}

/* ==========================================================================
   文章底部关联标签与上下篇导航美化 (Article Footer & Prev/Next Nav)
   ========================================================================== */
.card-footer {
  padding-top: 24px;
  border-top: 1px dashed var(--border-color);
  margin-top: 32px;
}

.card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
}

.card-tag {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 6px 14px;
  background-color: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
  color: var(--accent-primary) !important;
  font-size: 0.83rem;
  font-weight: 600;
  text-decoration: none;
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

.card-tag:hover {
  background-color: var(--accent-primary);
  color: #ffffff !important;
  border-color: var(--accent-primary);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.25);
}

/* 上一篇 / 下一篇 导航卡片 (精准贴合边框，防止溢出) */
.article-navigation {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-top: 32px;
  padding-top: 24px;
  border-top: 1px solid var(--border-color);
  width: 100%;
  max-width: 100%;
  box-sizing: border-box;
  overflow: hidden;
}

.article-nav-card {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 6px;
  padding: 16px 20px;
  background-color: var(--bg-primary);
  border: 1.5px solid var(--border-color);
  border-radius: var(--radius-md);
  text-decoration: none !important;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: var(--shadow-sm);
  min-width: 0;
  width: 100%;
  box-sizing: border-box;
  overflow: hidden;
}

.article-nav-card:hover {
  border-color: var(--accent-primary);
  background-color: var(--bg-secondary);
  transform: translateY(-3px);
  box-shadow: 0 8px 24px -4px rgba(0, 0, 0, 0.1);
}

.article-nav-label {
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--accent-primary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.article-nav-title {
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.45;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  transition: color var(--transition-fast);
}

.article-nav-card:hover .article-nav-title {
  color: var(--accent-primary);
}

@media (max-width: 640px) {
  .article-navigation {
    grid-template-columns: 1fr;
  }
  .article-prev-next-nav {
    grid-template-columns: 1fr !important;
  }
}

/* =============================================
   干货分享页 (vpn-guide.html) 专属样式
   ============================================= */

.guide-top-banner {
  background: linear-gradient(135deg, var(--accent-primary) 0%, #7c3aed 100%);
  color: #fff;
  border-radius: var(--radius-md);
  padding: 18px 22px;
  margin: 20px 0 28px;
}

.guide-top-banner h3 {
  color: #fff !important;
}

.guide-top-banner p {
  color: rgba(255,255,255,0.82) !important;
}

/* 分类区块 */
.guide-category-block {
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-bottom: 24px;
  transition: box-shadow 0.25s ease;
}

.guide-category-block:hover {
  box-shadow: var(--shadow-md);
}

/* 分类标题栏 */
.guide-category-header {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px 20px;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
}

.guide-category-icon {
  font-size: 1.6rem;
  flex-shrink: 0;
  line-height: 1;
}

.guide-category-title {
  font-size: 1.02rem;
  font-weight: 800;
  color: var(--text-primary);
  margin: 0 0 2px;
  line-height: 1.3;
}

.guide-category-desc {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin: 0;
  line-height: 1.4;
}

.guide-category-count {
  margin-left: auto;
  flex-shrink: 0;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--accent-primary);
  background: color-mix(in srgb, var(--accent-primary) 12%, transparent);
  padding: 3px 10px;
  border-radius: 20px;
}

/* 文章列表容器 */
.guide-articles-list {
  display: flex;
  flex-direction: column;
}

/* 每行文章 */
.guide-article-item {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 13px 20px;
  text-decoration: none;
  border-bottom: 1px solid var(--border-color);
  background: var(--bg-primary);
  transition: background 0.18s ease, border-left-color 0.18s ease;
  border-left: 3px solid transparent;
}

.guide-article-item:last-child {
  border-bottom: none;
}

.guide-article-item:hover {
  background: color-mix(in srgb, var(--accent-primary) 5%, var(--bg-primary));
  border-left-color: var(--accent-primary);
}

.guide-article-index {
  font-size: 0.72rem;
  font-weight: 800;
  color: var(--text-muted);
  background: var(--bg-secondary);
  border-radius: 6px;
  padding: 2px 7px;
  flex-shrink: 0;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.5px;
}

.guide-article-body {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.guide-article-title {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.45;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  transition: color var(--transition-fast);
}

.guide-article-item:hover .guide-article-title {
  color: var(--accent-primary);
}

.guide-article-excerpt {
  font-size: 0.74rem;
  color: var(--text-muted);
  line-height: 1.35;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.guide-article-meta {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 3px;
  flex-shrink: 0;
}

.guide-article-date,
.guide-article-views {
  font-size: 0.72rem;
  color: var(--text-muted);
  white-space: nowrap;
}

@media (max-width: 640px) {
  .guide-article-item {
    flex-wrap: wrap;
  }
  .guide-article-meta {
    flex-direction: row;
    gap: 8px;
    margin-left: auto;
  }
}