/* ==========================================================================
   KENDE AIRPORT (肯德机场) - MODERNIST DESIGN SYSTEM
   Theme: Black-ink & Soft-lemon Modernist
   Palette:
     White:      #FFFFFF
     Ink:        #202323
     Pale Lemon: #F2E8A7
     Warm Gray:  #ECEDE9
   ========================================================================== */

:root {
  --color-white: #FFFFFF;
  --color-ink: #202323;
  --color-lemon: #F2E8A7;
  --color-lemon-dark: #E4D784;
  --color-lemon-light: #FAF6D9;
  --color-warm-gray: #ECEDE9;
  --color-warm-gray-light: #F7F8F6;
  --color-ink-muted: #545B5B;
  --color-ink-subtle: #7A8282;
  --color-border: #202323;
  --color-border-subtle: #D5D8D3;
  
  --font-heading: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-body: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;

  --max-width: 1240px;
  --header-height: 72px;
  --space-unit: 8px;
}

/* Reset & Box Sizing */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-ink);
  background-color: var(--color-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 800;
  color: var(--color-ink);
  line-height: 1.2;
  letter-spacing: -0.02em;
}

h1 {
  font-size: 63px;
  line-height: 1.12;
  font-weight: 900;
}

@media (max-width: 768px) {
  h1 {
    font-size: 37px;
    line-height: 1.2;
  }
}

h2 {
  font-size: 36px;
  margin-bottom: 16px;
}

@media (max-width: 768px) {
  h2 {
    font-size: 26px;
  }
}

h3 {
  font-size: 22px;
  margin-bottom: 12px;
}

p {
  margin-bottom: 16px;
  color: var(--color-ink);
}

p.lead {
  font-size: 19px;
  line-height: 1.6;
  color: var(--color-ink-muted);
}

a {
  color: var(--color-ink);
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  text-decoration: underline;
}

/* Sharp modern borders & container */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}

.rule-black {
  border: none;
  border-top: 1px solid var(--color-ink);
  margin: 0;
}

.rule-thick {
  border: none;
  border-top: 2px solid var(--color-ink);
  margin: 0;
}

/* Header & Navigation */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: var(--color-white);
  border-bottom: 1px solid var(--color-ink);
  height: var(--header-height);
}

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

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: 20px;
  color: var(--color-ink);
  text-decoration: none !important;
}

.brand-logo img {
  height: 38px;
  width: auto;
  display: block;
}

.nav-desktop {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav-link {
  font-family: var(--font-heading);
  font-size: 15px;
  font-weight: 600;
  color: var(--color-ink);
  position: relative;
  padding: 6px 0;
  text-decoration: none;
}

.nav-link:hover {
  text-decoration: none;
}

.nav-link::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0%;
  height: 2px;
  background-color: var(--color-ink);
  transition: width 0.2s ease;
}

.nav-link:hover::after {
  width: 100%;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

/* Modernist Buttons: sharp rules, short color transition */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font-heading);
  font-size: 15px;
  font-weight: 700;
  padding: 12px 24px;
  border-radius: 0px; /* Modernist sharp geometry */
  cursor: pointer;
  text-decoration: none !important;
  line-height: 1;
  transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease, transform 0.15s ease;
}

.btn-primary {
  background-color: var(--color-ink);
  color: var(--color-white) !important;
  border: 1px solid var(--color-ink);
}

.btn-primary:hover {
  background-color: #383e3e;
  border-color: #383e3e;
}

.btn-lemon {
  background-color: var(--color-lemon);
  color: var(--color-ink) !important;
  border: 1px solid var(--color-ink);
}

.btn-lemon:hover {
  background-color: var(--color-lemon-dark);
}

.btn-secondary {
  background-color: transparent;
  color: var(--color-ink);
  border: 1px solid var(--color-ink);
}

.btn-secondary:hover {
  background-color: var(--color-warm-gray);
}

.btn-sm {
  padding: 8px 16px;
  font-size: 14px;
}

/* Mobile Menu Toggle */
.mobile-toggle {
  display: none;
  background: none;
  border: 1px solid var(--color-ink);
  padding: 8px;
  cursor: pointer;
  width: 42px;
  height: 42px;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
}

.mobile-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background-color: var(--color-ink);
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.mobile-toggle.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.mobile-toggle.active span:nth-child(2) {
  opacity: 0;
}

.mobile-toggle.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.mobile-drawer {
  display: none;
  background-color: var(--color-white);
  border-bottom: 2px solid var(--color-ink);
  padding: 24px;
}

.mobile-drawer.open {
  display: block;
}

.mobile-nav-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-bottom: 24px;
}

.mobile-nav-link {
  font-family: var(--font-heading);
  font-size: 18px;
  font-weight: 700;
  display: block;
  padding: 8px 0;
  border-bottom: 1px solid var(--color-warm-gray);
}

/* Section Common */
.section {
  padding: 80px 0;
  position: relative;
}

.section-warm {
  background-color: var(--color-warm-gray);
  border-top: 1px solid var(--color-ink);
  border-bottom: 1px solid var(--color-ink);
}

.section-header {
  margin-bottom: 48px;
}

.section-tag {
  display: inline-block;
  font-family: var(--font-heading);
  font-size: 12px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  background-color: var(--color-lemon);
  color: var(--color-ink);
  padding: 4px 10px;
  border: 1px solid var(--color-ink);
  margin-bottom: 16px;
}

.section-desc {
  font-size: 17px;
  color: var(--color-ink-muted);
  max-width: 720px;
}

/* ==========================================================================
   HERO SECTION
   Left oversized headline, right black-and-white network dashboard
   with lemon route markers.
   ========================================================================== */
.hero-section {
  padding: 72px 0 88px;
  background-color: var(--color-white);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.95fr;
  gap: 48px;
  align-items: center;
}

.hero-content {
  display: flex;
  flex-direction: column;
}

.hero-badge-wrap {
  margin-bottom: 24px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-heading);
  font-size: 13px;
  font-weight: 700;
  background-color: var(--color-lemon);
  border: 1px solid var(--color-ink);
  padding: 6px 14px;
}

.hero-badge-dot {
  width: 8px;
  height: 8px;
  background-color: var(--color-ink);
}

.hero-title {
  margin-bottom: 24px;
  letter-spacing: -0.03em;
}

.hero-summary {
  font-size: 18px;
  line-height: 1.65;
  color: var(--color-ink-muted);
  margin-bottom: 36px;
  max-width: 600px;
}

.hero-ctas {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px;
  margin-bottom: 32px;
}

.hero-meta-points {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  padding-top: 20px;
  border-top: 1px solid var(--color-warm-gray);
  font-size: 13px;
  color: var(--color-ink-subtle);
  font-family: var(--font-heading);
  font-weight: 600;
}

.hero-meta-points span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

/* Right Dashboard */
.hero-dashboard {
  background-color: var(--color-white);
  border: 2px solid var(--color-ink);
  box-shadow: 8px 8px 0px var(--color-ink);
  padding: 24px;
}

.dash-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--color-ink);
  padding-bottom: 14px;
  margin-bottom: 20px;
}

.dash-title {
  font-family: var(--font-heading);
  font-size: 13px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  display: flex;
  align-items: center;
  gap: 8px;
}

.dash-status {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  background-color: var(--color-warm-gray);
  padding: 3px 8px;
  border: 1px solid var(--color-ink);
}

.dash-status-dot {
  width: 7px;
  height: 7px;
  background-color: var(--color-ink);
}

/* Network Map & Route Markers (Blink Once On Load) */
.network-map-wrap {
  background-color: var(--color-warm-gray-light);
  border: 1px solid var(--color-ink);
  padding: 16px;
  margin-bottom: 20px;
  position: relative;
}

.network-svg {
  width: 100%;
  height: auto;
  display: block;
}

/* Animation: route markers blink once on load */
@keyframes markerBlinkOnce {
  0% { opacity: 0.2; transform: scale(0.6); }
  50% { opacity: 1; transform: scale(1.25); }
  100% { opacity: 1; transform: scale(1); }
}

.route-marker-dot {
  transform-origin: center;
  animation: markerBlinkOnce 0.8s ease-out 1 forwards;
}

.dash-regions {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.region-item {
  border: 1px solid var(--color-ink);
  background-color: var(--color-white);
  padding: 12px 14px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.region-item-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.region-code {
  font-family: var(--font-heading);
  font-size: 14px;
  font-weight: 800;
}

.region-badge-lemon {
  background-color: var(--color-lemon);
  border: 1px solid var(--color-ink);
  font-size: 10px;
  font-weight: 800;
  padding: 1px 6px;
  font-family: var(--font-mono);
}

.region-desc {
  font-size: 12px;
  color: var(--color-ink-muted);
  line-height: 1.4;
}

/* ==========================================================================
   THREE BENEFITS SECTION
   Typographic list with ONE illustrative panel, not three identical boxes
   ========================================================================== */
.benefits-section {
  padding: 88px 0;
  background-color: var(--color-white);
}

.benefits-layout {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: stretch;
}

.benefits-typographic-list {
  display: flex;
  flex-direction: column;
}

.benefit-typo-item {
  padding: 28px 0;
  border-top: 1px solid var(--color-ink);
}

.benefit-typo-item:last-child {
  border-bottom: 1px solid var(--color-ink);
}

.benefit-header-row {
  display: flex;
  align-items: baseline;
  gap: 18px;
  margin-bottom: 12px;
}

.benefit-index {
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 800;
  background-color: var(--color-lemon);
  border: 1px solid var(--color-ink);
  padding: 2px 8px;
}

.benefit-title {
  font-size: 24px;
  font-weight: 900;
  margin: 0;
}

.benefit-body {
  font-size: 15px;
  color: var(--color-ink-muted);
  line-height: 1.7;
  padding-left: 48px;
}

/* Single Illustrative Panel */
.benefits-illustrative-panel {
  background-color: var(--color-warm-gray);
  border: 2px solid var(--color-ink);
  box-shadow: 8px 8px 0px var(--color-ink);
  padding: 36px 32px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.illustrative-card-title {
  font-size: 20px;
  font-weight: 900;
  margin-bottom: 16px;
  border-bottom: 2px solid var(--color-ink);
  padding-bottom: 12px;
}

.illustrative-specs {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-bottom: 28px;
}

.spec-line {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 14px;
}

.spec-mark {
  background-color: var(--color-ink);
  color: var(--color-lemon);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  padding: 2px 6px;
  flex-shrink: 0;
}

.spec-text strong {
  display: block;
  color: var(--color-ink);
  font-weight: 700;
  margin-bottom: 2px;
}

.spec-text span {
  color: var(--color-ink-muted);
  font-size: 13px;
  line-height: 1.5;
}

.illustrative-footer-box {
  background-color: var(--color-white);
  border: 1px solid var(--color-ink);
  padding: 18px;
  font-size: 13px;
  color: var(--color-ink-muted);
}

.illustrative-footer-box strong {
  color: var(--color-ink);
}

/* ==========================================================================
   GLOBAL NODES: Large Region Directory
   Hong Kong, Japan, Singapore, US without fabricated stats
   ========================================================================== */
.nodes-directory-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

@media (max-width: 1024px) {
  .nodes-directory-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 600px) {
  .nodes-directory-grid {
    grid-template-columns: 1fr;
  }
}

.node-card {
  background-color: var(--color-white);
  border: 2px solid var(--color-ink);
  padding: 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.node-card:hover {
  transform: translateY(-2px);
  box-shadow: 4px 4px 0px var(--color-ink);
}

.node-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
}

.node-flag {
  font-size: 26px;
}

.node-code-tag {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  background-color: var(--color-warm-gray);
  border: 1px solid var(--color-ink);
  padding: 2px 8px;
}

.node-card h3 {
  font-size: 20px;
  margin-bottom: 8px;
}

.node-features-list {
  list-style: none;
  font-size: 13px;
  color: var(--color-ink-muted);
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px solid var(--color-warm-gray);
}

.node-features-list li::before {
  content: "— ";
  color: var(--color-ink);
  font-weight: 800;
}

/* ==========================================================================
   PRACTICAL USE CASES: AI & Streaming
   ChatGPT, Claude, Gemini, Google AI Studio, Perplexity, Cursor,
   YouTube, Netflix, Disney+, Spotify, Twitch
   ========================================================================== */
.cases-tabs-nav {
  display: flex;
  gap: 0;
  border-bottom: 2px solid var(--color-ink);
  margin-bottom: 32px;
}

.case-tab-btn {
  background: none;
  border: 2px solid var(--color-ink);
  border-bottom: none;
  font-family: var(--font-heading);
  font-size: 16px;
  font-weight: 800;
  padding: 12px 28px;
  cursor: pointer;
  margin-bottom: -2px;
  background-color: var(--color-warm-gray);
  color: var(--color-ink);
  transition: background-color 0.2s ease;
}

.case-tab-btn.active {
  background-color: var(--color-lemon);
  border-bottom: 2px solid var(--color-lemon);
}

.use-case-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

@media (max-width: 1024px) {
  .use-case-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .use-case-grid {
    grid-template-columns: 1fr;
  }
}

.use-case-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-ink);
  padding: 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.case-badge-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
}

.case-category {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  padding: 2px 6px;
  border: 1px solid var(--color-ink);
}

.case-category.ai {
  background-color: var(--color-lemon);
}

.case-category.media {
  background-color: var(--color-warm-gray);
}

.case-name {
  font-size: 19px;
  font-weight: 900;
  margin-bottom: 8px;
}

.case-scenario {
  font-size: 14px;
  color: var(--color-ink-muted);
  line-height: 1.6;
}

.case-tip {
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px solid var(--color-warm-gray);
  font-size: 12px;
  color: var(--color-ink-subtle);
}

/* ==========================================================================
   PRICING: Precise Comparison Grid
   Confirmed public package data; placeholders for editorial missing fields
   ========================================================================== */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  align-items: stretch;
}

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

.pricing-card {
  background-color: var(--color-white);
  border: 2px solid var(--color-ink);
  padding: 32px 28px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
}

.pricing-card.featured {
  background-color: var(--color-white);
  box-shadow: 8px 8px 0px var(--color-ink);
}

.pricing-card.featured::before {
  content: "推荐方案";
  position: absolute;
  top: -14px;
  left: 24px;
  background-color: var(--color-lemon);
  border: 1px solid var(--color-ink);
  font-family: var(--font-heading);
  font-size: 12px;
  font-weight: 800;
  padding: 2px 10px;
}

.pricing-tier-name {
  font-size: 22px;
  font-weight: 900;
  margin-bottom: 8px;
}

.pricing-tagline {
  font-size: 13px;
  color: var(--color-ink-muted);
  margin-bottom: 20px;
}

.pricing-price-wrap {
  display: flex;
  align-items: baseline;
  gap: 6px;
  margin-bottom: 20px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--color-ink);
}

.pricing-currency {
  font-size: 22px;
  font-weight: 800;
}

.pricing-amount {
  font-family: var(--font-heading);
  font-size: 46px;
  font-weight: 900;
  line-height: 1;
}

.pricing-cycle {
  font-size: 14px;
  color: var(--color-ink-muted);
}

.pricing-features {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 28px;
  font-size: 14px;
}

.pricing-features li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
}

.pricing-check {
  font-family: var(--font-mono);
  font-weight: 800;
  color: var(--color-ink);
}

.placeholder-notice {
  font-size: 12px;
  color: var(--color-ink-subtle);
  background-color: var(--color-warm-gray-light);
  border: 1px dashed var(--color-ink-subtle);
  padding: 6px 10px;
  margin-top: 12px;
  font-style: italic;
}

/* ==========================================================================
   NINE SEO ARTICLE CARDS
   Placed below pricing: 3 desktop / 2 tablet / 1 mobile
   Graphic numbers & thin borders
   ========================================================================== */
.articles-section {
  padding: 88px 0;
  background-color: var(--color-white);
  border-top: 1px solid var(--color-ink);
}

.article-cards-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

@media (max-width: 1024px) {
  .article-cards-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .article-cards-grid {
    grid-template-columns: 1fr;
  }
}

.article-card {
  border: 1px solid var(--color-ink);
  background-color: var(--color-white);
  padding: 28px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  text-decoration: none !important;
  color: inherit;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.article-card:hover {
  transform: translateY(-3px);
  box-shadow: 4px 4px 0px var(--color-ink);
  text-decoration: none !important;
}

.article-card-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 16px;
}

.article-card-num {
  font-family: var(--font-heading);
  font-size: 32px;
  font-weight: 900;
  color: var(--color-ink);
  line-height: 1;
  border-bottom: 2px solid var(--color-lemon);
  padding-bottom: 4px;
}

.article-card-tag {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  background-color: var(--color-warm-gray);
  padding: 2px 8px;
  border: 1px solid var(--color-ink);
}

.article-card-title {
  font-size: 19px;
  font-weight: 800;
  line-height: 1.35;
  margin-bottom: 12px;
  color: var(--color-ink);
}

.article-card-desc {
  font-size: 14px;
  color: var(--color-ink-muted);
  line-height: 1.6;
  margin-bottom: 20px;
}

.article-card-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 14px;
  border-top: 1px solid var(--color-warm-gray);
  font-size: 13px;
  font-weight: 700;
  color: var(--color-ink);
}

.article-card-foot span {
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

/* ==========================================================================
   AUTHENTIC / EXPLICIT SAMPLE TESTIMONIALS
   3-6 explicitly labeled sample user feedback
   ========================================================================== */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

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

.testimonial-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-ink);
  padding: 28px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.testimonial-sample-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  color: var(--color-ink-subtle);
  margin-bottom: 14px;
}

.testimonial-quote {
  font-size: 15px;
  line-height: 1.65;
  color: var(--color-ink);
  margin-bottom: 20px;
  font-style: normal;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: 12px;
  padding-top: 16px;
  border-top: 1px solid var(--color-warm-gray);
}

.author-avatar-box {
  width: 36px;
  height: 36px;
  background-color: var(--color-lemon);
  border: 1px solid var(--color-ink);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 14px;
}

.author-info h4 {
  font-size: 14px;
  font-weight: 700;
  margin: 0;
}

.author-info p {
  font-size: 12px;
  color: var(--color-ink-subtle);
  margin: 0;
}

/* ==========================================================================
   FAQ SECTION
   Interactive, accessible accordion
   ========================================================================== */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
  max-width: 880px;
  margin: 0 auto;
}

.faq-item {
  border: 1px solid var(--color-ink);
  background-color: var(--color-white);
}

.faq-question {
  width: 100%;
  text-align: left;
  background: none;
  border: none;
  padding: 20px 24px;
  font-family: var(--font-heading);
  font-size: 17px;
  font-weight: 800;
  color: var(--color-ink);
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  transition: background-color 0.2s ease;
}

.faq-question:hover {
  background-color: var(--color-warm-gray-light);
}

.faq-icon {
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 700;
  transition: transform 0.2s ease;
}

.faq-item.active .faq-icon {
  transform: rotate(45deg);
}

.faq-answer {
  display: none;
  padding: 0 24px 20px;
  font-size: 15px;
  color: var(--color-ink-muted);
  line-height: 1.7;
  border-top: 1px dashed var(--color-warm-gray);
  padding-top: 16px;
}

.faq-item.active .faq-answer {
  display: block;
}

/* ==========================================================================
   FOOTER
   Links to About, Terms, Privacy, Sitemap, Tutorial
   and once each to external partners:
   jichanghelper.com ("2026 机场排名")
   tizivpnhelp.com ("2026 机场推荐指南")
   tizicloud.com ("机场与网络使用指南") - target="_blank" without nofollow!
   ========================================================================== */
.site-footer {
  background-color: var(--color-ink);
  color: var(--color-white);
  padding: 64px 0 32px;
  border-top: 2px solid var(--color-ink);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 48px;
}

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

@media (max-width: 600px) {
  .footer-grid {
    grid-template-columns: 1fr;
  }
}

.footer-brand h3 {
  color: var(--color-white);
  font-size: 20px;
  font-weight: 900;
  margin-bottom: 12px;
}

.footer-brand p {
  color: #A0A8A8;
  font-size: 14px;
  line-height: 1.6;
}

.footer-col h4 {
  color: var(--color-lemon);
  font-size: 15px;
  font-weight: 800;
  letter-spacing: 0.05em;
  margin-bottom: 16px;
  text-transform: uppercase;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
  font-size: 14px;
}

.footer-links a {
  color: #D1D6D6;
  text-decoration: none;
  transition: color 0.2s ease;
}

.footer-links a:hover {
  color: var(--color-lemon);
  text-decoration: underline;
}

.footer-bottom {
  border-top: 1px solid #383E3E;
  padding-top: 28px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  font-size: 13px;
  color: #8C9494;
}

.footer-bottom-links {
  display: flex;
  gap: 20px;
}

.footer-bottom-links a {
  color: #8C9494;
}

.footer-bottom-links a:hover {
  color: var(--color-lemon);
}

/* ==========================================================================
   ARTICLE & SUBPAGE STYLING
   ========================================================================== */
.page-header {
  padding: 48px 0 32px;
  background-color: var(--color-warm-gray-light);
  border-bottom: 1px solid var(--color-ink);
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-family: var(--font-heading);
  margin-bottom: 16px;
  color: var(--color-ink-muted);
}

.breadcrumb a {
  color: var(--color-ink-muted);
}

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

.breadcrumb-sep {
  color: var(--color-ink-subtle);
}

.article-hero-title {
  font-size: 40px;
  font-weight: 900;
  line-height: 1.2;
  margin-bottom: 16px;
}

@media (max-width: 768px) {
  .article-hero-title {
    font-size: 28px;
  }
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px;
  font-size: 13px;
  color: var(--color-ink-subtle);
  font-family: var(--font-heading);
}

.article-meta-badge {
  background-color: var(--color-lemon);
  color: var(--color-ink);
  border: 1px solid var(--color-ink);
  padding: 2px 8px;
  font-weight: 800;
}

.article-body-layout {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 48px;
  padding: 48px 0 80px;
}

@media (max-width: 960px) {
  .article-body-layout {
    grid-template-columns: 1fr;
  }
}

.article-content {
  font-size: 16px;
  line-height: 1.8;
  color: var(--color-ink);
}

.article-content h2 {
  font-size: 26px;
  margin: 36px 0 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--color-ink);
}

.article-content h3 {
  font-size: 20px;
  margin: 28px 0 12px;
}

.article-content ul, .article-content ol {
  margin: 16px 0 24px 24px;
}

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

.article-content blockquote {
  border-left: 4px solid var(--color-ink);
  background-color: var(--color-warm-gray);
  padding: 16px 20px;
  margin: 24px 0;
  font-style: normal;
}

.article-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 24px 0;
  font-size: 14px;
}

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

.article-content th {
  background-color: var(--color-warm-gray);
  font-weight: 800;
}

.article-sidebar {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.sidebar-box {
  border: 1px solid var(--color-ink);
  padding: 24px;
  background-color: var(--color-white);
}

.sidebar-box.lemon-tint {
  background-color: var(--color-lemon-light);
  border: 2px solid var(--color-ink);
}

.sidebar-title {
  font-size: 16px;
  font-weight: 800;
  border-bottom: 1px solid var(--color-ink);
  padding-bottom: 8px;
  margin-bottom: 16px;
}

.related-articles-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
  font-size: 14px;
}

.related-articles-list a {
  font-weight: 600;
  color: var(--color-ink);
  line-height: 1.4;
}

.related-articles-list a:hover {
  text-decoration: underline;
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* Mobile responsive navigation styles */
@media (max-width: 820px) {
  .nav-desktop {
    display: none;
  }
  .mobile-toggle {
    display: flex;
  }
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 36px;
  }
  .benefits-layout {
    grid-template-columns: 1fr;
  }
}