/* ==========================================================================
   大哥云vpn Simplified Chinese Landing Site - Transit Timetable Theme
   Colors:
   - Primary (Midnight Green): #173B3B
   - Accent (Muted Orange): #C98952
   - Surface (Station Gray): #E7ECE9
   - Background (White): #FFFFFF
   ========================================================================== */

:root {
  --color-primary: #173B3B;
  --color-primary-light: #255252;
  --color-accent: #C98952;
  --color-accent-hover: #b57743;
  --color-surface: #E7ECE9;
  --color-surface-dark: #d5ded9;
  --color-bg: #FFFFFF;
  --color-text: #173B3B;
  --color-text-muted: #4F6767;
  --color-border: #C6D3CE;
  --color-card-bg: #F9FBF9;

  --font-sans: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", sans-serif;
  --font-serif: Georgia, "Noto Serif SC", "Source Han Serif SC", "Songti SC", STSong, serif;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;

  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;

  --max-width: 1200px;
  --header-height: 70px;
}

/* Base resets & typography */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: var(--font-sans);
  font-size: 17px;
  line-height: 1.65;
  color: var(--color-text);
  background-color: var(--color-bg);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-sans);
  color: var(--color-primary);
  font-weight: 700;
  line-height: 1.25;
}

h1 {
  font-size: 35px;
  letter-spacing: -0.02em;
}

@media (min-width: 1024px) {
  h1 {
    font-size: 52px;
  }
}

h2 {
  font-size: 28px;
  margin-bottom: 1rem;
}

@media (min-width: 768px) {
  h2 {
    font-size: 36px;
  }
}

h3 {
  font-size: 20px;
  margin-bottom: 0.5rem;
}

.intro-text {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  color: var(--color-text-muted);
  line-height: 1.8;
}

.mono {
  font-family: var(--font-mono);
}

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

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

/* Layout Container */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.25rem;
}

/* Timetable Badges & Station Elements */
.stn-code {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  background-color: var(--color-primary);
  color: var(--color-bg);
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-sm);
  display: inline-block;
  vertical-align: middle;
}

.stn-code-accent {
  background-color: var(--color-accent);
  color: #FFFFFF;
}

.stn-code-outline {
  background-color: transparent;
  color: var(--color-primary);
  border: 1px solid var(--color-primary);
}

.timetable-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 0.75rem;
}

.timetable-tag::before {
  content: "";
  display: inline-block;
  width: 8px;
  height: 8px;
  background-color: var(--color-accent);
  border-radius: 50%;
}

/* Buttons & CTAs */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.85rem 1.75rem;
  font-size: 1rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all 0.2s ease;
  text-decoration: none;
  border: 2px solid transparent;
}

.btn-primary {
  background-color: var(--color-accent);
  color: #FFFFFF;
}

.btn-primary:hover {
  background-color: var(--color-accent-hover);
  color: #FFFFFF;
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(201, 137, 82, 0.25);
}

.btn-secondary {
  background-color: var(--color-surface);
  color: var(--color-primary);
  border-color: var(--color-border);
}

.btn-secondary:hover {
  background-color: var(--color-surface-dark);
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.btn-outline {
  background-color: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.btn-outline:hover {
  background-color: var(--color-primary);
  color: #FFFFFF;
}

/* Header & Mobile Nav */
.header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border);
  height: var(--header-height);
}

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

.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--color-primary);
  letter-spacing: -0.02em;
}

.brand-logo .logo-badge {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  background-color: var(--color-primary);
  color: #FFF;
  padding: 0.15rem 0.4rem;
  border-radius: 3px;
}

.nav-desktop {
  display: none;
}

@media (min-width: 900px) {
  .nav-desktop {
    display: flex;
    align-items: center;
    gap: 2rem;
  }
}

.nav-link {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--color-primary);
  padding: 0.5rem 0;
  position: relative;
}

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

.nav-link.active::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background-color: var(--color-accent);
}

.mobile-menu-btn {
  display: flex;
  flex-direction: column;
  justify-content: space-around;
  width: 30px;
  height: 24px;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 0;
  z-index: 1001;
}

@media (min-width: 900px) {
  .mobile-menu-btn {
    display: none;
  }
}

.mobile-menu-btn span {
  width: 100%;
  height: 3px;
  background-color: var(--color-primary);
  border-radius: 2px;
  transition: all 0.3s ease;
}

.mobile-menu-btn.is-active span:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}

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

.mobile-menu-btn.is-active span:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

.mobile-nav {
  display: none;
  position: fixed;
  top: var(--header-height);
  left: 0;
  width: 100%;
  background-color: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  padding: 1.5rem 1.25rem;
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
  z-index: 999;
}

.mobile-nav.is-open {
  display: block;
}

.mobile-nav-links {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  list-style: none;
  margin-bottom: 1.5rem;
}

.mobile-nav-links a {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--color-primary);
}

/* Hero Section */
.hero-section {
  padding: 3.5rem 0 4rem;
  background-color: #FFFFFF;
  border-bottom: 1px solid var(--color-border);
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
  align-items: center;
}

@media (min-width: 900px) {
  .hero-grid {
    grid-template-columns: 1fr 1fr;
    gap: 3.5rem;
  }
}

.hero-content {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 1rem;
}

/* Network Dashboard / Transit Timetable Widget */
.hero-dashboard {
  background-color: var(--color-primary);
  border: 1px solid var(--color-primary);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  color: #FFFFFF;
  box-shadow: 0 12px 30px rgba(23, 59, 59, 0.15);
  position: relative;
}

.dashboard-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid rgba(255, 255, 255, 0.15);
  padding-bottom: 1rem;
  margin-bottom: 1.5rem;
}

.dashboard-title {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  letter-spacing: 1px;
  color: var(--color-accent);
  text-transform: uppercase;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.dashboard-title-dot {
  width: 8px;
  height: 8px;
  background-color: var(--color-accent);
  border-radius: 50%;
}

.dashboard-sys-id {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--color-surface);
  opacity: 0.8;
}

/* Route SVG Animation */
.route-map-svg {
  width: 100%;
  height: 220px;
}

.route-track {
  stroke: rgba(255, 255, 255, 0.2);
  stroke-width: 2.5;
  stroke-dasharray: 6 4;
}

.route-track-main {
  stroke: rgba(255, 255, 255, 0.35);
  stroke-width: 3;
}

.station-node {
  fill: var(--color-primary);
  stroke: var(--color-accent);
  stroke-width: 3;
}

.station-label {
  fill: #FFFFFF;
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 600;
}

.station-code-label {
  fill: rgba(255, 255, 255, 0.7);
  font-family: var(--font-mono);
  font-size: 11px;
}

.route-indicator {
  fill: var(--color-accent);
  stroke: #FFFFFF;
  stroke-width: 2;
  filter: drop-shadow(0 0 6px var(--color-accent));
  animation: moveIndicator 16s linear infinite;
}

@keyframes moveIndicator {
  0% { transform: translate(40px, 110px); }
  33% { transform: translate(150px, 60px); }
  66% { transform: translate(260px, 160px); }
  100% { transform: translate(370px, 110px); }
}

@media (prefers-reduced-motion: reduce) {
  .route-indicator {
    animation: none !important;
  }
}

.timetable-list {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  margin-top: 1rem;
}

.timetable-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.6rem 0.8rem;
  background-color: rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  border-left: 3px solid var(--color-accent);
}

.timetable-row-dest {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-weight: 600;
}

.timetable-row-line {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: rgba(255, 255, 255, 0.8);
}

/* Sections Common */
.section {
  padding: 4.5rem 0;
  border-bottom: 1px solid var(--color-border);
}

.section-alt {
  background-color: var(--color-surface);
}

.section-header {
  text-align: center;
  max-width: 750px;
  margin: 0 auto 3.5rem;
}

.section-header p {
  color: var(--color-text-muted);
  font-size: 1.1rem;
}

/* Advantages / Route Explanations */
.advantages-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
}

@media (min-width: 768px) {
  .advantages-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.advantage-card {
  background-color: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 2rem 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  position: relative;
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.advantage-card:hover {
  transform: translateY(-4px);
  border-color: var(--color-accent);
}

.advantage-card .route-no {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--color-accent);
  letter-spacing: 1px;
}

.advantage-card h3 {
  font-size: 1.35rem;
  color: var(--color-primary);
}

.advantage-card p {
  color: var(--color-text-muted);
  font-size: 0.95rem;
  line-height: 1.6;
}

/* Departure Board (Global Nodes) */
.departure-board {
  background-color: var(--color-primary);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  color: #FFFFFF;
  box-shadow: 0 10px 25px rgba(23, 59, 59, 0.12);
  overflow-x: auto;
}

.board-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  min-width: 600px;
}

.board-table th {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  letter-spacing: 1px;
  color: var(--color-accent);
  text-transform: uppercase;
  padding: 0.85rem 1rem;
  border-bottom: 2px solid rgba(255, 255, 255, 0.15);
}

.board-table td {
  padding: 1rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  font-size: 0.95rem;
}

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

.board-table tr:hover td {
  background-color: rgba(255, 255, 255, 0.04);
}

.node-status-tag {
  display: inline-block;
  padding: 0.2rem 0.5rem;
  border-radius: 3px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 600;
  background-color: rgba(201, 137, 82, 0.2);
  color: var(--color-accent);
  border: 1px solid var(--color-accent);
}

/* Use Cases Section */
.usecase-tabs {
  display: flex;
  flex-direction: column;
  gap: 2.5rem;
}

.usecase-block {
  background-color: #FFFFFF;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 2rem;
}

.usecase-block-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.5rem;
  padding-bottom: 1rem;
  border-bottom: 2px solid var(--color-surface);
}

.usecase-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
}

@media (min-width: 768px) {
  .usecase-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .usecase-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.usecase-item {
  background-color: var(--color-surface);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  border-left: 4px solid var(--color-primary);
}

.usecase-item h4 {
  font-size: 1.1rem;
  color: var(--color-primary);
  margin-bottom: 0.4rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.usecase-item p {
  font-size: 0.92rem;
  color: var(--color-text-muted);
}

/* Pricing Section */
.pricing-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  margin-bottom: 2rem;
}

@media (min-width: 768px) {
  .pricing-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.pricing-card {
  background-color: #FFFFFF;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 2.5rem 1.75rem;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.pricing-card:hover {
  transform: translateY(-4px);
  border-color: var(--color-accent);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
}

.pricing-card.featured {
  border-color: var(--color-accent);
  background-color: #FFFDFB;
}

.pricing-badge {
  position: absolute;
  top: -12px;
  right: 20px;
  background-color: var(--color-accent);
  color: #FFFFFF;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.25rem 0.75rem;
  border-radius: 12px;
  text-transform: uppercase;
}

.pricing-header {
  margin-bottom: 1.5rem;
  padding-bottom: 1.25rem;
  border-bottom: 1px solid var(--color-border);
}

.pricing-title {
  font-size: 1.4rem;
  color: var(--color-primary);
  margin-bottom: 0.5rem;
}

.pricing-price {
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--color-primary);
  font-family: var(--font-sans);
}

.pricing-price span {
  font-size: 0.95rem;
  font-weight: 400;
  color: var(--color-text-muted);
}

.pricing-features {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  margin-bottom: 2rem;
  flex-grow: 1;
}

.pricing-features li {
  font-size: 0.95rem;
  color: var(--color-text);
  display: flex;
  align-items: flex-start;
  gap: 0.6rem;
}

.pricing-features li::before {
  content: "✓";
  color: var(--color-accent);
  font-weight: 700;
}

.editorial-note {
  background-color: var(--color-surface);
  border-left: 3px solid var(--color-accent);
  padding: 0.85rem 1.25rem;
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  color: var(--color-text-muted);
  margin-top: 1rem;
}

/* Article Cards Section */
/* Requirement: 9 SEO article cards shown after pricing in 3 desktop / 2 tablet / 1 mobile columns */
.articles-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.75rem;
}

@media (min-width: 640px) {
  .articles-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .articles-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.article-card {
  background-color: #FFFFFF;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 1.25rem;
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.article-card:hover {
  transform: translateY(-3px);
  border-color: var(--color-accent);
}

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

.article-card h3 {
  font-size: 1.2rem;
  color: var(--color-primary);
  line-height: 1.4;
}

.article-card p {
  font-size: 0.92rem;
  color: var(--color-text-muted);
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.article-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 1rem;
  border-top: 1px solid var(--color-surface);
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--color-accent);
}

/* Testimonials Section */
.testimonials-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

@media (min-width: 768px) {
  .testimonials-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.testimonial-card {
  background-color: #FFFFFF;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 1rem;
}

.testimonial-card blockquote {
  font-size: 0.95rem;
  color: var(--color-text);
  font-style: italic;
  line-height: 1.6;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding-top: 0.75rem;
  border-top: 1px solid var(--color-surface);
}

.testimonial-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background-color: var(--color-primary);
  color: #FFFFFF;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-family: var(--font-mono);
  font-size: 0.9rem;
}

.testimonial-info h4 {
  font-size: 0.95rem;
  color: var(--color-primary);
}

.testimonial-info p {
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

/* FAQ Accordion Section */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.faq-item {
  background-color: #FFFFFF;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.faq-item details {
  width: 100%;
}

.faq-item summary {
  padding: 1.25rem 1.5rem;
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--color-primary);
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  user-select: none;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 1.4rem;
  color: var(--color-accent);
  font-weight: 400;
  transition: transform 0.2s ease;
}

.faq-item details[open] summary::after {
  content: "−";
}

.faq-item summary:hover {
  background-color: var(--color-card-bg);
}

.faq-answer {
  padding: 0 1.5rem 1.5rem 1.5rem;
  color: var(--color-text-muted);
  font-size: 0.98rem;
  line-height: 1.7;
  border-top: 1px solid var(--color-surface);
}

/* Footer Section */
.footer {
  background-color: var(--color-primary);
  color: #FFFFFF;
  padding: 4rem 0 2rem;
  margin-top: auto;
  border-top: 3px solid var(--color-accent);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
  margin-bottom: 3rem;
}

@media (min-width: 768px) {
  .footer-grid {
    grid-template-columns: 2fr 1fr 1fr 1fr;
  }
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.footer-brand .brand-logo {
  color: #FFFFFF;
}

.footer-brand p {
  color: rgba(255, 255, 255, 0.75);
  font-size: 0.92rem;
  max-width: 320px;
}

.footer-col h4 {
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: 0.9rem;
  letter-spacing: 1px;
  text-transform: uppercase;
  margin-bottom: 1.2rem;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.footer-links a {
  color: rgba(255, 255, 255, 0.85);
  font-size: 0.92rem;
}

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

.footer-bottom {
  padding-top: 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  display: flex;
  flex-direction: column;
  gap: 1rem;
  align-items: center;
  justify-content: space-between;
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.6);
  text-align: center;
}

@media (min-width: 768px) {
  .footer-bottom {
    flex-direction: row;
    text-align: left;
  }
}

/* Article Page Layout */
.article-page {
  padding: 3rem 0 5rem;
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.88rem;
  color: var(--color-text-muted);
  margin-bottom: 2rem;
  flex-wrap: wrap;
}

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

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

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

.article-container {
  max-width: 860px;
  margin: 0 auto;
}

.article-header {
  margin-bottom: 2.5rem;
  padding-bottom: 1.5rem;
  border-bottom: 2px solid var(--color-surface);
}

.article-meta-info {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  margin-top: 1rem;
  font-size: 0.88rem;
  color: var(--color-text-muted);
}

.article-content {
  font-size: 1.05rem;
  line-height: 1.8;
  color: #243333;
}

.article-content h2 {
  margin-top: 2.5rem;
  margin-bottom: 1.2rem;
  padding-bottom: 0.4rem;
  border-bottom: 1px solid var(--color-border);
}

.article-content h3 {
  margin-top: 1.8rem;
  margin-bottom: 0.8rem;
}

.article-content p {
  margin-bottom: 1.4rem;
}

.article-content ul, .article-content ol {
  margin-bottom: 1.4rem;
  padding-left: 1.5rem;
}

.article-content li {
  margin-bottom: 0.5rem;
}

.article-content blockquote {
  border-left: 4px solid var(--color-accent);
  background-color: var(--color-surface);
  padding: 1rem 1.25rem;
  margin-bottom: 1.5rem;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-style: italic;
}

.article-content code {
  font-family: var(--font-mono);
  background-color: var(--color-surface);
  padding: 0.2rem 0.4rem;
  border-radius: 3px;
  font-size: 0.9em;
}

.article-content pre {
  background-color: var(--color-primary);
  color: #FFFFFF;
  padding: 1.25rem;
  border-radius: var(--radius-md);
  overflow-x: auto;
  margin-bottom: 1.5rem;
}

.article-content pre code {
  background: none;
  padding: 0;
  color: inherit;
}

.related-articles {
  margin-top: 4rem;
  padding-top: 2.5rem;
  border-top: 2px solid var(--color-surface);
}

.related-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
  margin-top: 1.5rem;
}

@media (min-width: 640px) {
  .related-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}