@import url('https://fonts.googleapis.com/css2?family=Cormorant+Garamond:ital,wght@0,400;0,600;0,700;1,400&family=IBM+Plex+Mono:wght@400;500;600&family=Inter:wght@400;500;600;700&family=Noto+Serif+SC:wght@300;400;600&family=Noto+Sans+SC:wght@400;500;700&display=swap');

:root, [data-theme="dark"] {
  /* Typography System (古典衬线标题 + 高精无衬线正文 + 等宽元数据) */
  --font-display-serif: 'Cormorant Garamond', 'Noto Serif SC', 'Songti SC', 'Source Han Serif SC', STSong, Georgia, serif;
  --font-family: 'Inter', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'PingFang SC', sans-serif;
  --font-mono: 'IBM Plex Mono', 'JetBrains Mono', Consolas, Monaco, monospace;
  
  /* Reading Grid & Typography Golden Ratios */
  --reading-max-width: 720px;
  --line-height-body: 1.8;
  
  /* Quantum Ladder Theme (极光阶梯跃迁风) Palette */
  --bg-color: #070A13; /* 深渊跃迁黑 (60%) */
  --bg-card: rgba(15, 23, 42, 0.72); /* 虚空折射蓝灰 #0F172A (20%) with glass translucency */
  --bg-card-hover: rgba(22, 34, 60, 0.85);
  --bg-nav: rgba(7, 10, 19, 0.82);
  
  /* Main Text & Framing (10%) */
  --text-main: #F8FAFC; /* 极光霜白 */
  --text-muted: #CBD5E1;
  --text-sub: #94A3B8; /* 阶梯浅雾灰 */
  
  /* Borders & Cyan Glow Accents */
  --border-color: rgba(56, 189, 248, 0.22);
  --border-color-light: rgba(0, 242, 254, 0.55);
  
  /* CTA & Gradient Accents (10%) */
  --accent-primary: #00F2FE; /* 通天电光青 */
  --accent-primary-hover: #38BDF8;
  --accent-secondary: #4FACFE; /* 跃升亮蓝 */
  --accent-purple: #818CF8; /* 阶梯指示紫 */
  --accent-success: #10B981; /* 满载绿 */
  --accent-warning: #F59E0B;
  --accent-danger: #EF4444;
  
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.65);
  --shadow-lg: 0 16px 36px rgba(0, 242, 254, 0.15);
  
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --radius-full: 9999px;
  
  --transition-fast: 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-normal: 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

[data-theme="light"] {
  /* 纸本质感浅色模式 (Editorial Paper) */
  --bg-color: #FBF9F5; /* 暖调羊皮纸白 (60%) */
  --bg-card: #F2EFE9; /* 柔和淡燕麦灰 (20%) */
  --bg-card-hover: #EAE6DF;
  --bg-nav: rgba(251, 249, 245, 0.92);
  
  --text-main: #1A1918; /* 深浓石墨炭黑 (10%) */
  --text-muted: #383533;
  --text-sub: #5C5854;
  
  --border-color: #E6E1D8; /* 浅暖灰 0.5px / 1px 细线 */
  --border-color-light: #9E3A26;
  
  --accent-primary: #9E3A26; /* 陶土暗红 (10%) */
  --accent-primary-hover: #802E1E;
  --accent-secondary: #4A6054; /* 灰调鼠尾草绿 */
  --accent-purple: #6B5B95;
  --accent-success: #3B7A57;
  --accent-warning: #C86D26;
  --accent-danger: #B23B2A;
  
  --shadow-sm: 0 1px 4px rgba(26, 25, 24, 0.04);
  --shadow-md: 0 4px 16px rgba(26, 25, 24, 0.06);
  --shadow-lg: 0 12px 28px rgba(26, 25, 24, 0.08);
}

/* Reset & Base Styling */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

img.airport-logo,
.airport-brand-info img,
.airport-feature-card img,
.review-card-title img,
.review-header img {
  width: 44px !important;
  height: 44px !important;
  max-width: 44px !important;
  max-height: 44px !important;
  min-width: 44px !important;
  min-height: 44px !important;
  object-fit: cover !important;
  flex-shrink: 0 !important;
  border-radius: var(--radius-sm);
}

.table-logo img,
tr td img,
.airport-table td img {
  width: 24px !important;
  height: 24px !important;
  max-width: 24px !important;
  max-height: 24px !important;
  min-width: 24px !important;
  min-height: 24px !important;
  object-fit: cover !important;
  flex-shrink: 0 !important;
  border-radius: 4px;
}


html {
  scroll-behavior: smooth;
  font-family: var(--font-family);
  background-color: #070A13;
  color: var(--text-main);
  line-height: 1.6;
}

[data-theme="light"] html {
  background-color: #FBF9F5;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  position: relative;
  overflow-x: hidden;
}

/* Quantum Ladder Dynamic Canvas Background */
#quantumLadderCanvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: -1;
  pointer-events: none;
}

[data-theme="dark"] body {
  background-image: linear-gradient(180deg, rgba(7, 10, 19, 0.45) 0%, rgba(10, 15, 30, 0.65) 100%), url('./images/dark_bg.jpg');
  background-size: cover;
  background-position: center center;
  background-attachment: fixed;
  background-repeat: no-repeat;
  background-color: #070A13;
}

[data-theme="light"] body {
  background-image: linear-gradient(180deg, rgba(251, 249, 245, 0.42) 0%, rgba(242, 239, 233, 0.58) 100%), url('./images/light_forest_bg.jpg');
  background-size: cover;
  background-position: center center;
  background-attachment: fixed;
  background-repeat: no-repeat;
  background-color: #FBF9F5;
}

[data-theme="light"] #quantumLadderCanvas {
  display: block;
  opacity: 0.65;
}

/* Quantum Ladder & Editorial Paper Card Micro-stroke Effects */
.content-card,
.airport-feature-card,
.catalog-card,
.sidebar-widget,
.faq-toc-card,
.protocol-toc-card,
.protocol-block,
.faq-item-custom,
.coupon-box-yellow,
.info-box-blue {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  box-shadow: 0 8px 32px rgba(7, 10, 19, 0.8), inset 0 0 12px rgba(0, 242, 254, 0.03);
}

[data-theme="light"] .content-card,
[data-theme="light"] .airport-feature-card,
[data-theme="light"] .catalog-card,
[data-theme="light"] .sidebar-widget,
[data-theme="light"] .faq-toc-card,
[data-theme="light"] .protocol-toc-card,
[data-theme="light"] .protocol-block,
[data-theme="light"] .faq-item-custom,
[data-theme="light"] .coupon-box-yellow,
[data-theme="light"] .info-box-blue {
  background: rgba(251, 249, 245, 0.88);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: 0 10px 30px rgba(26, 25, 24, 0.12);
  border: 1px solid rgba(230, 225, 216, 0.85);
}

/* 1px Cyan Micro-stroke on card bottom corners in dark theme */
[data-theme="dark"] .content-card::after,
[data-theme="dark"] .airport-feature-card::after,
[data-theme="dark"] .catalog-card::after,
[data-theme="dark"] .sidebar-widget::after,
[data-theme="dark"] .faq-toc-card::after,
[data-theme="dark"] .protocol-toc-card::after,
[data-theme="dark"] .protocol-block::after {
  content: "";
  position: absolute;
  bottom: -1px;
  right: -1px;
  width: 24px;
  height: 24px;
  border-bottom: 2px solid #00F2FE;
  border-right: 2px solid #00F2FE;
  border-bottom-right-radius: var(--radius-md);
  pointer-events: none;
  opacity: 0.85;
}

/* Light mode Editorial Terracotta accent on cards */
[data-theme="light"] .content-card::after,
[data-theme="light"] .airport-feature-card::after,
[data-theme="light"] .catalog-card::after,
[data-theme="light"] .sidebar-widget::after,
[data-theme="light"] .faq-toc-card::after,
[data-theme="light"] .protocol-toc-card::after,
[data-theme="light"] .protocol-block::after {
  content: "";
  position: absolute;
  bottom: -1px;
  right: -1px;
  width: 20px;
  height: 20px;
  border-bottom: 2px solid #9E3A26;
  border-right: 2px solid #9E3A26;
  border-bottom-right-radius: var(--radius-md);
  pointer-events: none;
  opacity: 0.7;
}

/* CTA Buttons Override for Light Mode */
[data-theme="dark"] .btn-primary-action,
[data-theme="dark"] .btn-oval-action,
[data-theme="dark"] .btn-copy-code {
  background: linear-gradient(135deg, #00F2FE 0%, #4FACFE 100%) !important;
  color: #070A13 !important;
  font-weight: 700 !important;
  box-shadow: 0 4px 16px rgba(0, 242, 254, 0.35) !important;
}

[data-theme="light"] .btn-primary-action,
[data-theme="light"] .btn-oval-action,
[data-theme="light"] .btn-copy-code {
  background: linear-gradient(135deg, #9E3A26 0%, #4A6054 100%) !important;
  color: #FBF9F5 !important;
  font-weight: 700 !important;
  box-shadow: 0 4px 14px rgba(158, 58, 38, 0.25) !important;
}

.btn-primary-action:hover,
.btn-oval-action:hover,
.btn-copy-code:hover {
  box-shadow: 0 6px 24px rgba(0, 242, 254, 0.6) !important;
  transform: translateY(-2px);
}

/* Header & Navbar */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--bg-nav);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  padding: 0.75rem 1.5rem;
}

.nav-container {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.brand-title, .logo {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  font-weight: 800;
  font-size: 1.25rem;
  color: var(--text-main);
  text-decoration: none;
}

.site-logo-img {
  width: 44px !important;
  height: 44px !important;
  max-width: 44px !important;
  max-height: 44px !important;
  object-fit: contain !important;
  border-radius: 8px;
  filter: drop-shadow(0 3px 8px rgba(0, 242, 254, 0.4));
  transition: transform 0.2s ease;
}

.logo:hover .site-logo-img {
  transform: scale(1.05);
}

.logo-text {
  font-family: var(--font-family);
  font-weight: 800;
  font-size: 1.5rem;
  color: #FFFFFF !important;
  background: none !important;
  -webkit-background-clip: unset !important;
  -webkit-text-fill-color: #FFFFFF !important;
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.9), 0 0 16px rgba(0, 242, 254, 0.4);
  letter-spacing: 0.02em;
}

[data-theme="light"] .logo-text {
  color: #0F172A !important;
  -webkit-text-fill-color: #0F172A !important;
  text-shadow: 0 1px 4px rgba(0, 0, 0, 0.15);
}

.brand-title .logo-icon {
  font-size: 1.5rem;
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  border-radius: var(--radius-sm);
  padding: 2px 6px;
}

.nav-search {
  flex: 1;
  max-width: 380px;
  position: relative;
  display: flex;
  align-items: center;
}

.nav-search .search-icon {
  position: absolute;
  left: 12px;
  font-size: 0.9rem;
  color: var(--text-sub);
}

.nav-search input {
  width: 100%;
  padding: 0.5rem 2.5rem 0.5rem 2.2rem;
  border-radius: var(--radius-full);
  border: 1px solid var(--border-color);
  background: var(--bg-color);
  color: var(--text-main);
  font-size: 0.875rem;
  transition: var(--transition-fast);
}

.nav-search input:focus {
  outline: none;
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
}

.nav-search .search-shortcut {
  position: absolute;
  right: 12px;
  font-size: 0.75rem;
  color: var(--text-sub);
  background: var(--border-color);
  padding: 2px 6px;
  border-radius: 4px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.nav-link {
  color: var(--text-muted);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.95rem;
  transition: var(--transition-fast);
}

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

.theme-toggle-btn {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  padding: 0.5rem;
  border-radius: var(--radius-full);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition-fast);
}

.theme-toggle-btn:hover {
  background: var(--border-color);
}

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

/* Main Layout Structure */
.main-content {
  max-width: 1400px;
  width: 100%;
  margin: 0 auto;
  padding: 1.5rem 2rem;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

/* Breadcrumbs */
.breadcrumb ol {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  list-style: none;
  font-size: 0.875rem;
  color: var(--text-sub);
}

.breadcrumb a {
  color: var(--text-muted);
  text-decoration: none;
  transition: var(--transition-fast);
}

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

.breadcrumb .current {
  color: var(--text-main);
  font-weight: 600;
}

/* Article Hero Banner */
.article-hero {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.hero-badge {
  align-self: flex-start;
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.25), rgba(245, 158, 11, 0.25));
  border: 1px solid rgba(245, 158, 11, 0.5);
  color: #fbbf24;
  font-weight: 700;
  font-size: 0.9rem;
  padding: 0.4rem 1rem;
  border-radius: var(--radius-full);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

.article-title, h1, .section-tag-header h2, .catalog-card-header span, .widget-title, .faq-toc-title, .protocol-toc-title {
  font-family: var(--font-display-serif);
  letter-spacing: -0.015em;
}

.article-title {
  font-size: 2.35rem;
  font-weight: 700;
  line-height: 1.28;
  color: var(--text-main);
}

.article-meta, .spec-label, .meta-item, .search-shortcut, .coupon-code, code, pre {
  font-family: var(--font-mono);
}

/* Subtle Link Underline Slide-in Micro-interaction (150ms-250ms) */
a {
  position: relative;
  transition: color 0.18s cubic-bezier(0.16, 1, 0.3, 1);
}

.nav-links a:hover, .breadcrumb a:hover, .catalog-sublist li a:hover, .sidebar-sub-list li a:hover {
  color: var(--accent-primary);
}

/* Article Reading Body Container Rules (680px - 740px, 1.8 Line-Height) */
.reading-container, .article-content, .hero-intro-box p {
  max-width: var(--reading-max-width);
  line-height: var(--line-height-body);
  font-size: 1.05rem;
}

/* Dark Code Blocks Borderless & Clean Design */
pre, code {
  font-family: var(--font-mono);
  font-size: 0.9rem;
}

pre {
  background: var(--bg-card) !important;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  overflow-x: auto;
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 0.75rem;
  font-size: 0.85rem;
  color: var(--text-sub);
}

.badge-verify {
  color: var(--accent-success);
  font-weight: 600;
}

.hero-intro-box {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-left: 4px solid var(--accent-secondary);
  padding: 1.25rem;
  border-radius: var(--radius-md);
  color: var(--text-muted);
  font-size: 1rem;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

/* Quick Filter Section */
.quick-filter-section {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  padding: 1rem 1.25rem;
  border-radius: var(--radius-md);
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

.section-tag-header h3 {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-main);
}

.filter-chips-container {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.chip-btn {
  background: rgba(15, 22, 38, 0.65);
  border: 1px solid rgba(255, 255, 255, 0.22);
  color: #ffffff;
  padding: 0.45rem 0.9rem;
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  transition: var(--transition-fast);
}

.chip-btn:hover {
  border-color: #f59e0b;
  color: #ffffff;
  background: rgba(30, 42, 68, 0.8);
}

.chip-btn.active {
  background: linear-gradient(135deg, #2563eb 0%, #f59e0b 100%);
  border-color: #f59e0b;
  color: #ffffff;
  font-weight: 700;
  box-shadow: 0 4px 14px rgba(245, 158, 11, 0.4);
}

/* Content Cards Base */
.content-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: var(--shadow-md);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 1rem;
}

.card-header h2 {
  font-size: 1.45rem;
  font-weight: 800;
  color: #ffffff;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.7);
}

.subtitle {
  font-size: 0.875rem;
  color: #cbd5e1;
  font-weight: 400;
}

/* Table Component */
.table-tools {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.table-tools input, .table-tools select {
  background: rgba(10, 16, 28, 0.65);
  border: 1px solid rgba(255, 255, 255, 0.25);
  color: #ffffff;
  padding: 0.45rem 0.85rem;
  border-radius: var(--radius-md);
  font-size: 0.85rem;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.table-wrapper {
  overflow-x: auto;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
}

.airport-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.9rem;
}

.airport-table th {
  background: rgba(22, 32, 54, 0.85);
  color: #ffffff;
  font-weight: 700;
  padding: 0.85rem 1rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.15);
  white-space: nowrap;
}

.airport-table td {
  padding: 0.85rem 1rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  color: #f8fafc;
  vertical-align: middle;
}

.airport-table tr:last-child td {
  border-bottom: none;
}

.airport-table tr:hover {
  background: var(--bg-card-hover);
}

/* Table Links & Pills */
.pill-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.1), rgba(139, 92, 246, 0.1));
  border: 1px solid rgba(59, 130, 246, 0.3);
  color: var(--accent-primary);
  text-decoration: none;
  font-weight: 600;
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius-full);
  font-size: 0.825rem;
  transition: var(--transition-fast);
}

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

.pill-link img {
  border-radius: 50%;
}

.tag-pill {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.15rem 0.5rem;
  border-radius: var(--radius-sm);
}

.tag-blue { background: rgba(59, 130, 246, 0.15); color: #60a5fa; }
.tag-green { background: rgba(16, 185, 129, 0.15); color: #34d399; }
.tag-purple { background: rgba(139, 92, 246, 0.15); color: #a78bfa; }
.tag-red { background: rgba(239, 68, 68, 0.15); color: #f87171; }
.tag-gray { background: rgba(156, 163, 175, 0.15); color: #9ca3af; }

.table-footer-summary {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.85rem;
  color: var(--text-muted);
  padding-top: 0.5rem;
}

/* Speed Benchmark Visualization */
.benchmark-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.25rem;
}

.benchmark-card {
  background: var(--bg-color);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.benchmark-card .card-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.benchmark-card .ap-name {
  font-weight: 700;
  font-size: 0.95rem;
}

.benchmark-card .ping-val {
  font-size: 0.8rem;
  color: var(--accent-success);
  font-weight: 600;
}

.bar-container {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

.bar-label-row {
  display: flex;
  justify-content: space-between;
  font-size: 0.75rem;
  color: var(--text-sub);
}

.bar-bg {
  height: 8px;
  background: var(--border-color);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
  border-radius: var(--radius-full);
  transition: width 1s ease-out;
}

/* Guide & Checklist Split Section */
.guide-grid-section {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}

@media (max-width: 900px) {
  .guide-grid-section {
    grid-template-columns: 1fr;
  }
}

/* Accordions */
.accordion-group {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.accordion-item {
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  background: var(--bg-color);
  overflow: hidden;
  transition: var(--transition-fast);
}

.accordion-header {
  padding: 0.85rem 1rem;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  user-select: none;
}

.accordion-header::-webkit-details-marker {
  display: none;
}

.acc-title {
  flex: 1;
  font-size: 0.95rem;
}

.acc-arrow {
  font-size: 0.75rem;
  color: var(--text-sub);
  transition: transform 0.2s ease;
}

details[open] .acc-arrow {
  transform: rotate(180deg);
}

.accordion-body {
  padding: 1rem;
  border-top: 1px solid var(--border-color);
  color: var(--text-muted);
  font-size: 0.9rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.mini-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.8rem;
}

.mini-table th, .mini-table td {
  border: 1px solid var(--border-color);
  padding: 0.4rem 0.6rem;
  text-align: left;
}

.mini-table th {
  background: var(--bg-card-hover);
}

/* Checklist Styling */
.checklist-items {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.check-item {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  background: var(--bg-color);
  border: 1px solid var(--border-color);
  padding: 0.75rem 1rem;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: var(--transition-fast);
}

.check-item:hover {
  border-color: var(--accent-primary);
}

.task-checkbox {
  display: none;
}

.custom-check {
  width: 20px;
  height: 20px;
  border: 2px solid var(--border-color-light);
  border-radius: 4px;
  flex-shrink: 0;
  margin-top: 2px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition-fast);
}

.task-checkbox:checked + .custom-check {
  background: var(--accent-success);
  border-color: var(--accent-success);
}

.task-checkbox:checked + .custom-check::after {
  content: '✓';
  color: #ffffff;
  font-size: 0.85rem;
  font-weight: bold;
}

.task-checkbox:checked ~ .check-text {
  text-decoration: line-through;
  color: var(--text-sub);
}

.check-text {
  font-size: 0.875rem;
  color: var(--text-muted);
}

.checklist-progress {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 0.5rem;
}

.progress-bar-bg {
  height: 8px;
  background: var(--bg-color);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.progress-bar-fill {
  height: 100%;
  background: var(--accent-success);
  border-radius: var(--radius-full);
  transition: width 0.3s ease;
}

/* Guarantee Table */
.guarantee-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
}

.guarantee-table th, .guarantee-table td {
  padding: 0.85rem 1rem;
  border: 1px solid var(--border-color);
}

.guarantee-table th {
  background: var(--bg-card-hover);
  text-align: left;
}

/* Detailed Reviews Section */
.reviews-section {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.section-title-wrapper h2 {
  font-size: 1.6rem;
  font-weight: 800;
}

.reviews-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 1.5rem;
}

.review-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  box-shadow: var(--shadow-sm);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  transition: var(--transition-normal);
}

.review-card:hover {
  transform: translateY(-4px);
  border-color: var(--accent-primary);
  box-shadow: var(--shadow-md);
}

.review-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
}

.review-card-title {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.review-card-title img {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  border: 1px solid var(--border-color);
}

.review-card-title h3 {
  font-size: 1.15rem;
  font-weight: 700;
}

.review-card-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.review-card-specs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.5rem;
  background: var(--bg-color);
  padding: 0.75rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  font-size: 0.8rem;
}

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

.spec-item .label {
  color: var(--text-sub);
}

.spec-item .value {
  color: var(--text-main);
  font-weight: 600;
}

.promo-code-box {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(59, 130, 246, 0.08);
  border: 1px dashed var(--accent-primary);
  padding: 0.5rem 0.85rem;
  border-radius: var(--radius-md);
  font-size: 0.85rem;
}

.promo-code-box code {
  color: var(--accent-primary);
  font-weight: 700;
  font-family: monospace;
}

.copy-btn {
  background: var(--accent-primary);
  color: #ffffff;
  border: none;
  padding: 0.25rem 0.6rem;
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition-fast);
}

.copy-btn:hover {
  background: var(--accent-primary-hover);
}

.review-card-actions {
  display: flex;
  gap: 0.75rem;
  margin-top: auto;
}

.btn-primary {
  flex: 1;
  text-align: center;
  background: var(--accent-primary);
  color: #ffffff;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.875rem;
  padding: 0.6rem 1rem;
  border-radius: var(--radius-md);
  transition: var(--transition-fast);
}

.btn-primary:hover {
  background: var(--accent-primary-hover);
  box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
}

.btn-secondary {
  border: 1px solid var(--border-color);
  color: var(--text-main);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.875rem;
  padding: 0.6rem 1rem;
  border-radius: var(--radius-md);
  transition: var(--transition-fast);
}

.btn-secondary:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-color-light);
}

/* Footer */
.site-footer {
  background: var(--bg-card);
  border-top: 1px solid var(--border-color);
  padding: 3rem 1.5rem 2rem;
  margin-top: 3rem;
}

.footer-container {
  max-width: 1280px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 2rem;
}

@media (max-width: 768px) {
  .footer-container {
    grid-template-columns: 1fr;
  }
}

.footer-col h3, .footer-col h4 {
  margin-bottom: 0.85rem;
  font-weight: 700;
}

.footer-col p {
  color: var(--text-muted);
  font-size: 0.875rem;
  margin-bottom: 0.5rem;
}

.footer-col ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.footer-col a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.875rem;
  transition: var(--transition-fast);
}

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

.copyright {
  font-size: 0.8rem;
  color: var(--text-sub);
  margin-top: 1rem;
}

/* Toast Notifications */
.toast-notification {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  z-index: 1000;
  background: #0f172a;
  color: #ffffff;
  border: 1px solid #334155;
  padding: 0.75rem 1.25rem;
  border-radius: var(--radius-md);
  box-shadow: 0 10px 25px rgba(0,0,0,0.5);
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.9rem;
  font-weight: 500;
  opacity: 0;
  transform: translateY(20px);
  pointer-events: none;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.toast-notification.show {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

/* Mobile Responsive Tweaks */
@media (max-width: 768px) {
  .nav-links, .nav-search {
    display: none;
  }
  
  .article-title {
    font-size: 1.5rem;
  }
  
  .reviews-grid {
    grid-template-columns: 1fr;
  }
}

/* Knowledge Base Section Styling */
.knowledge-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.25rem;
  margin-top: 1.5rem;
  margin-bottom: 2rem;
}

.knowledge-card {
  background: var(--bg-card-hover);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  transition: var(--transition-normal);
}

.knowledge-card:hover {
  border-color: var(--accent-secondary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.knowledge-card .k-icon {
  font-size: 2rem;
  margin-bottom: 0.75rem;
}

.knowledge-card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 0.5rem;
}

.knowledge-card p {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: 1rem;
  line-height: 1.5;
}

.k-list {
  list-style: none;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.k-list li {
  position: relative;
  padding-left: 1.2rem;
  margin-bottom: 0.4rem;
  line-height: 1.4;
}

.k-list li::before {
  content: "•";
  position: absolute;
  left: 0.2rem;
  color: var(--accent-primary);
}

.knowledge-faq {
  border-top: 1px solid var(--border-color);
  padding-top: 1.5rem;
  margin-top: 1rem;
}

.knowledge-faq .faq-title {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 1rem;
  color: var(--text-main);
}

/* Popular Science Section Styling */
.science-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.5rem;
  margin-top: 1.5rem;
}

.science-card {
  background: var(--bg-card-hover);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  transition: var(--transition-normal);
}

.science-card:hover {
  border-color: var(--accent-secondary);
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
}

.science-tag {
  display: inline-block;
  align-self: flex-start;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.25rem 0.65rem;
  border-radius: var(--radius-full);
  margin-bottom: 0.75rem;
}

.badge-purple { background: rgba(139, 92, 246, 0.15); color: #a78bfa; border: 1px solid rgba(139, 92, 246, 0.3); }
.badge-blue { background: rgba(59, 130, 246, 0.15); color: #60a5fa; border: 1px solid rgba(59, 130, 246, 0.3); }
.badge-green { background: rgba(16, 185, 129, 0.15); color: #34d399; border: 1px solid rgba(16, 185, 129, 0.3); }
.badge-red { background: rgba(239, 68, 68, 0.15); color: #f87171; border: 1px solid rgba(239, 68, 68, 0.3); }

.science-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-main);
  line-height: 1.4;
  margin-bottom: 0.5rem;
}

.science-meta {
  font-size: 0.775rem;
  color: var(--text-sub);
  display: flex;
  gap: 0.4rem;
  align-items: center;
  margin-bottom: 0.75rem;
}

.science-excerpt {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.55;
  margin-bottom: 1.25rem;
}

.science-link {
  color: var(--accent-primary);
  font-weight: 600;
  font-size: 0.875rem;
  text-decoration: none;
  transition: var(--transition-fast);
  display: inline-flex;
  align-items: center;
}

.science-link:hover {
  color: var(--accent-secondary);
  transform: translateX(3px);
}

/* Table of Contents & Article Catalog Directory */
.table-of-contents {
  background: var(--bg-card);
  border: 1px solid var(--border-color-light);
  border-radius: var(--radius-md);
  padding: 1.25rem 1.5rem;
  margin: 1.5rem 0 2rem 0;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

.toc-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--accent-secondary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border-color);
}

.toc-list {
  list-style: none;
  padding-left: 0;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.toc-list li a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.925rem;
  transition: var(--transition-fast);
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.toc-list li a:hover {
  color: var(--accent-secondary);
  transform: translateX(4px);
}

/* Category Directory Box for knowledge.html and articles.html */
.catalog-section {
  margin: 2rem 0;
}

.catalog-layout {
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: 3rem;
  align-items: start;
}

@media (max-width: 992px) {
  .catalog-layout {
    grid-template-columns: 1fr;
  }
}

.catalog-grid, .catalog-grid-2col {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
  margin-top: 1rem;
}

@media (max-width: 768px) {
  .catalog-grid, .catalog-grid-2col {
    grid-template-columns: 1fr;
  }
}

.catalog-sidebar {
  position: sticky;
  top: 90px;
}

.sidebar-widget {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: var(--shadow-md);
}

.widget-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-main);
  padding-bottom: 0.75rem;
  margin-bottom: 0.75rem;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.sidebar-catalog-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  max-height: calc(100vh - 160px);
  overflow-y: auto;
  padding-right: 4px;
}

.sidebar-catalog-item > a {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-main);
  text-decoration: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: var(--transition-normal);
}

.sidebar-catalog-item > a:hover {
  color: var(--accent-primary);
}

.sidebar-sub-list {
  list-style: none;
  padding-left: 0.6rem;
  margin-top: 0.35rem;
  border-left: 2px solid var(--border-color);
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

.sidebar-sub-list li a {
  font-size: 0.8rem;
  color: var(--text-sub);
  text-decoration: none;
  transition: var(--transition-normal);
  display: block;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.sidebar-sub-list li a:hover {
  color: var(--accent-secondary);
  padding-left: 3px;
}

.catalog-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  transition: var(--transition-normal);
}

.catalog-card:hover {
  border-color: var(--accent-secondary);
  box-shadow: var(--shadow-lg);
}

.catalog-card-header {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 0.75rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.catalog-card-header a {
  color: var(--accent-primary);
  text-decoration: none;
}

.catalog-card-header a:hover {
  color: var(--accent-secondary);
}

.catalog-sublist {
  list-style: none;
  padding-left: 0;
  margin-top: 0.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.catalog-sublist li a {
  color: var(--text-sub);
  font-size: 0.875rem;
  text-decoration: none;
  transition: var(--transition-fast);
  display: flex;
  align-items: center;
  gap: 0.3rem;
}

.catalog-sublist li a:hover {
  color: var(--accent-primary);
  padding-left: 4px;
}

/* Featured Airport Cards Grid Layout */
.featured-airports-section {
  margin: 3rem 0;
}

.featured-airports-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.75rem;
  margin-top: 1.25rem;
}

@media (max-width: 900px) {
  .featured-airports-grid {
    grid-template-columns: 1fr;
  }
}

.airport-feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.6rem;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 1.25rem;
  transition: var(--transition-normal);
}

.airport-feature-card:hover {
  border-color: var(--accent-secondary);
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.airport-card-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
}

.airport-brand-info {
  display: flex;
  align-items: center;
  gap: 0.85rem;
}

.airport-brand-info img {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  object-fit: cover;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-color);
}

.airport-title-group h3 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-main);
  line-height: 1.3;
}

.rank-badge {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--accent-secondary);
  background: rgba(245, 158, 11, 0.15);
  border: 1px solid rgba(245, 158, 11, 0.3);
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  margin-right: 6px;
}

.airport-card-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: 0.35rem;
}

.airport-advantages-box {
  background: rgba(0, 0, 0, 0.15);
  border: 1px dashed var(--border-color);
  border-radius: var(--radius-sm);
  padding: 1rem;
}

[data-theme="light"] .airport-advantages-box {
  background: #f8fafc;
}

.airport-advantages-box h4 {
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 0.5rem;
}

.airport-advantages-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.airport-advantages-list li {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.5;
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
}

.airport-advantages-list li::before {
  content: "•";
  color: var(--accent-primary);
  font-weight: bold;
}

.airport-specs-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.5rem;
  background: var(--bg-color);
  padding: 0.75rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
}

@media (max-width: 540px) {
  .airport-specs-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 0.75rem;
  }
}

.spec-box {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}

.spec-box .spec-label {
  font-size: 0.75rem;
  color: var(--text-sub);
}

.spec-box .spec-value {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-main);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.airport-card-actions {
  display: flex;
  align-items: center;
  gap: 0.85rem;
}

.btn-primary-action {
  flex: 1.2;
  background: var(--accent-primary);
  color: #ffffff;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.9rem;
  padding: 0.65rem 1rem;
  border-radius: var(--radius-sm);
  text-align: center;
  transition: var(--transition-fast);
}

.btn-primary-action:hover {
  background: var(--accent-primary-hover);
  box-shadow: 0 4px 12px rgba(59, 130, 246, 0.35);
}

.btn-secondary-action {
  flex: 1;
  background: transparent;
  border: 1px solid var(--border-color);
  color: var(--text-main);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.875rem;
  padding: 0.65rem 0.85rem;
  border-radius: var(--radius-sm);
  text-align: center;
  transition: var(--transition-fast);
}

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

/* ==========================================================================
   Article Detail Page Template (Pure White Background & Modern Clean Aesthetic)
   ========================================================================== */

body.article-page,
body:has(.article-detail-box),
body:has(.article-main-box) {
  background-color: #ffffff !important;
  color: #1e293b !important;
}

/* Pure White Navbar Styles */
.navbar,
header.navbar,
header.header {
  background: #ffffff !important;
  border-bottom: 1px solid #e2e8f0 !important;
  position: sticky !important;
  top: 0 !important;
  z-index: 1000 !important;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04) !important;
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0.85rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  text-decoration: none !important;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.logo-icon {
  display: none !important;
}

.logo-text,
.logo span,
.brand-title span {
  font-size: 1.25rem !important;
  font-weight: 800 !important;
  color: #0f172a !important;
  letter-spacing: -0.01em;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.75rem;
}

.nav-links a,
.nav-link {
  color: #334155 !important;
  text-decoration: none !important;
  font-size: 0.95rem !important;
  font-weight: 600 !important;
  padding: 0.4rem 0.6rem;
  border-radius: 6px;
  transition: all 0.2s ease;
}

.nav-links a:hover,
.nav-link:hover,
.nav-links a.active,
.nav-link.active {
  color: #2563eb !important;
  background: #f1f5f9 !important;
}

.layout-wrapper,
.article-container {
  max-width: 1200px;
  margin: 2rem auto;
  padding: 0 1.5rem;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 280px;
  gap: 2.5rem;
  align-items: start;
}

@media (max-width: 992px) {
  .layout-wrapper,
  .article-container {
    grid-template-columns: 1fr;
  }
}

/* White Card Container for Content */
.article-detail-box,
.article-main-box,
.article-layout {
  background: #ffffff !important;
  border: 1px solid #e2e8f0 !important;
  border-radius: 16px !important;
  padding: 2.5rem !important;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.03) !important;
  color: #1e293b !important;
}

/* Article Hero / Header */
.article-header,
.article-hero {
  margin-bottom: 2rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid #f1f5f9;
}

.article-header h1,
.article-hero h1,
.article-title {
  font-size: 2.1rem !important;
  font-weight: 800 !important;
  color: #0f172a !important;
  line-height: 1.35 !important;
  margin-bottom: 1rem !important;
  letter-spacing: -0.02em;
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem;
  font-size: 0.875rem;
  color: #64748b !important;
}

.article-meta span {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

/* Article Body Typography */
.article-body {
  font-size: 1.05rem !important;
  line-height: 1.85 !important;
  color: #334155 !important;
}

.article-body p {
  margin-bottom: 1.5rem;
}

.article-body a {
  color: #2563eb !important;
  text-decoration: none !important;
  font-weight: 500;
  border-bottom: 1px dashed rgba(37, 99, 235, 0.4);
  transition: all 0.2s ease;
}

.article-body a:hover {
  color: #1d4ed8 !important;
  border-bottom-style: solid;
}

.article-body h2 {
  font-size: 1.45rem !important;
  font-weight: 700 !important;
  color: #0f172a !important;
  margin: 2.5rem 0 1.25rem 0 !important;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid #f1f5f9;
  scroll-margin-top: 90px;
}

.article-body h3 {
  font-size: 1.2rem !important;
  font-weight: 600 !important;
  color: #1e293b !important;
  margin: 1.75rem 0 1rem 0 !important;
  scroll-margin-top: 90px;
}

.article-body strong {
  color: #0f172a !important;
  font-weight: 700 !important;
}

.article-body ul,
.article-body ol {
  margin: 1rem 0 1.5rem 1.5rem;
  padding-left: 0.5rem;
}

.article-body li {
  margin-bottom: 0.65rem;
  line-height: 1.75;
}

.article-body blockquote {
  background: #f8fafc !important;
  border-left: 4px solid #3b82f6 !important;
  padding: 1.25rem 1.5rem !important;
  margin: 1.75rem 0 !important;
  border-radius: 0 12px 12px 0 !important;
  color: #475569 !important;
  font-size: 1rem !important;
}

/* Option / Feature Cards Grid (Matching User Template Screenshot) */
.option-cards-grid,
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.25rem;
  margin: 2rem 0;
}

.option-card {
  background: #ffffff !important;
  border: 1px solid #e2e8f0 !important;
  border-radius: 12px !important;
  padding: 1.35rem 1.5rem !important;
  text-decoration: none !important;
  color: inherit !important;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: all 0.2s ease-in-out;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.02) !important;
}

.option-card:hover {
  border-color: #cbd5e1 !important;
  transform: translateY(-3px);
  box-shadow: 0 8px 16px rgba(0, 0, 0, 0.06) !important;
}

.option-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.75rem;
}

.option-card-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: #0f172a;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.option-card-arrow {
  color: #64748b;
  font-size: 1.25rem;
  font-weight: 600;
  transition: transform 0.2s ease;
}

.option-card:hover .option-card-arrow {
  transform: translateX(4px);
  color: #2563eb;
}

.option-card-desc {
  font-size: 0.9rem;
  color: #64748b;
  line-height: 1.6;
}

/* Sticky Right Sidebar (此页内容 TOC) */
.sidebar,
.article-sidebar {
  position: sticky;
  top: 90px;
}

.sidebar-toc-box,
.sidebar .widget,
.article-sidebar .sidebar-widget {
  background: #ffffff !important;
  border: 1px solid #e2e8f0 !important;
  border-radius: 14px !important;
  padding: 1.5rem !important;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.02) !important;
}

.toc-title,
.widget-title {
  font-size: 1rem !important;
  font-weight: 700 !important;
  color: #0f172a !important;
  margin-bottom: 1rem !important;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.toc-list,
.widget-links,
.sidebar-toc {
  list-style: none !important;
  padding: 0 !important;
  margin: 0 !important;
}

.toc-list li,
.widget-links li,
.sidebar-toc li {
  margin-bottom: 0.65rem !important;
}

.toc-list a,
.widget-links a,
.sidebar-toc a {
  color: #64748b !important;
  text-decoration: none !important;
  font-size: 0.9rem !important;
  transition: color 0.2s ease;
  display: block;
  padding: 0.2rem 0;
}

.toc-list a:hover,
.widget-links a:hover,
.sidebar-toc a:hover {
  color: #2563eb !important;
  font-weight: 500 !important;
}

/* ==========================================================================
   Airport Review Article Template Styles (Matching User Template Screenshots)
   ========================================================================== */

.review-hero-header {
  margin-bottom: 2rem;
}

.review-title {
  font-size: 2.1rem !important;
  font-weight: 800 !important;
  color: #0f172a !important;
  line-height: 1.35 !important;
  margin-bottom: 1.25rem !important;
}

.review-meta-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1.25rem;
  font-size: 0.875rem;
  color: #64748b;
  margin-bottom: 1.75rem;
  padding-bottom: 1.25rem;
  border-bottom: 1px solid #f1f5f9;
}

.meta-tags {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.tag-badge {
  padding: 0.2rem 0.65rem;
  border-radius: 6px;
  font-size: 0.78rem;
  font-weight: 600;
}

.tag-blue { background: #e0f2fe; color: #0369a1; }
.tag-pink { background: #fce7f3; color: #be185d; }
.tag-yellow { background: #fef3c7; color: #b45309; }

.review-logo-wrap {
  display: flex;
  justify-content: center;
  margin: 1.5rem 0 2.5rem 0;
}

.review-logo-img {
  width: 140px !important;
  height: 140px !important;
  max-width: 140px !important;
  max-height: 140px !important;
  object-fit: contain !important;
  border-radius: 24px !important;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08) !important;
}

/* Feature Pills Row */
.feature-pills-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-bottom: 1.25rem;
}

.pill-badge {
  background: #e0f2fe;
  color: #0369a1;
  font-size: 0.85rem;
  font-weight: 600;
  padding: 0.35rem 0.85rem;
  border-radius: 50px;
}

/* Cyan Summary Box */
.cyan-summary-box {
  background: #e6f7f9 !important;
  border-radius: 16px !important;
  padding: 1.75rem 2rem !important;
  margin-bottom: 1.5rem !important;
  border: 1px solid #cceef2 !important;
}

.summary-box-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: #0f172a;
  margin-bottom: 1.25rem;
}

.summary-list {
  list-style: none !important;
  padding: 0 !important;
  margin: 0 !important;
}

.summary-list li {
  font-size: 0.95rem;
  color: #334155;
  margin-bottom: 0.65rem;
  position: relative;
  padding-left: 1.25rem;
  line-height: 1.7;
}

.summary-list li::before {
  content: "•";
  position: absolute;
  left: 0;
  color: #0284c7;
  font-size: 1.2rem;
  line-height: 1;
}

/* Action Oval Button */
.action-btn-wrap {
  margin: 1.5rem 0 2.5rem 0;
}

.btn-oval-action {
  display: inline-block;
  padding: 0.75rem 2rem;
  border: 1.5px solid #0f172a;
  border-radius: 50px;
  color: #0f172a !important;
  text-decoration: none !important;
  font-weight: 700;
  font-size: 1rem;
  transition: all 0.2s ease;
  background: #ffffff;
}

.btn-oval-action:hover {
  background: #0f172a;
  color: #ffffff !important;
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(15, 23, 42, 0.15);
}

/* Pricing Table */
.plans-table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
  font-size: 0.95rem;
  background: #ffffff;
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid #e2e8f0;
}

.plans-table th,
.plans-table td {
  padding: 1rem 1.25rem;
  border-bottom: 1px solid #f1f5f9;
  text-align: left;
}

.plans-table th {
  background: #f8fafc;
  font-weight: 700;
  color: #0f172a;
}

.btn-table-buy {
  display: inline-block;
  padding: 0.4rem 0.9rem;
  border: 1px solid #475569;
  border-radius: 50px;
  color: #1e293b !important;
  text-decoration: none !important;
  font-size: 0.85rem;
  font-weight: 600;
  transition: all 0.2s ease;
}

.btn-table-buy:hover {
  background: #2563eb;
  border-color: #2563eb;
  color: #ffffff !important;
}

/* Payment Methods */
.payment-methods-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin: 1.5rem 0;
  font-size: 0.95rem;
  color: #0f172a;
}

.pay-pill {
  background: #e0f2fe;
  color: #0369a1;
  font-size: 0.85rem;
  font-weight: 600;
  padding: 0.25rem 0.75rem;
  border-radius: 50px;
}

/* Coupon Box (Yellow Callout) */
.coupon-box-yellow {
  background: #fef9c3 !important;
  border: 1px solid #fef08a !important;
  border-radius: 14px !important;
  padding: 1.5rem !important;
  margin: 1.75rem 0 !important;
}

.coupon-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: #854d0e;
  margin-bottom: 0.75rem;
}

.coupon-box-yellow ul {
  list-style: none !important;
  padding: 0 !important;
  margin: 0 !important;
}

.coupon-box-yellow li {
  font-size: 0.95rem;
  color: #713f12;
  margin-bottom: 0.5rem;
  line-height: 1.6;
}

.coupon-code {
  background: #ffffff;
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  font-family: monospace;
  font-weight: 700;
  color: #0f172a;
  border: 1px solid #fde047;
}

.btn-copy-code {
  background: #0284c7;
  color: #ffffff;
  border: none;
  padding: 0.25rem 0.75rem;
  border-radius: 50px;
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  margin-left: 0.5rem;
  transition: background 0.2s ease;
}

.btn-copy-code:hover {
  background: #0369a1;
}

/* Info Box (Blue Callout) */
.info-box-blue {
  background: #f0f9ff !important;
  border: 1px solid #e0f2fe !important;
  border-radius: 14px !important;
  padding: 1.5rem !important;
  margin: 1.75rem 0 !important;
}

.info-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: #0369a1;
  margin-bottom: 0.75rem;
}

.info-box-blue p {
  font-size: 0.95rem;
  color: #0c4a6e;
  line-height: 1.7;
  margin: 0 !important;
}