/* ==========================================================================
   Modern Tech Magazine Editorial Design System
   Brand: 快雷GO / 快雷GO Cloud (KUAILEIGO ACCELERATOR)
   Palette:
     - Main BG: #FAF8F3 (Ivory White)
     - Title: #262627 (Deep Charcoal)
     - Body: #62615E (Warm Grey)
     - Primary: #743E46 (Deep Wine Red)
     - Accent: #B69A72 (Soft Sand Gold)
     - Border: #E5E0D8 (Warm Border Grey)
   ========================================================================== */

:root {
  --bg-main: #FAF8F3;
  --bg-card: #FFFFFF;
  --bg-subtle: #F3EFE6;
  --bg-accent-light: #F7F3EB;
  
  --text-title: #262627;
  --text-body: #62615E;
  --text-muted: #8E8C87;
  --text-light: #FAF8F3;

  --color-primary: #743E46;
  --color-primary-hover: #5B3037;
  --color-accent: #B69A72;
  --color-accent-hover: #9E835C;
  --border-color: #E5E0D8;
  --border-dark: #C5BFB5;
  
  --font-serif: "Noto Serif SC", "Songti SC", "STSong", "Source Han Serif SC", "Georgia", serif;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  
  --container-width: 1200px;
  --header-height: 72px;
  --radius-sm: 2px;
  --radius-md: 4px;
  --transition-base: 0.25s ease;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  background-color: var(--bg-main);
  color: var(--text-body);
  font-family: var(--font-sans);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background-color: var(--bg-main);
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-base);
}

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

ul, ol {
  list-style: none;
}

button, input, textarea, select {
  font-family: inherit;
  font-size: inherit;
  border: none;
  background: none;
  outline: none;
}

/* Typography Utility */
.font-serif {
  font-family: var(--font-serif);
}

.editorial-num {
  font-family: var(--font-serif);
  font-size: 0.85rem;
  letter-spacing: 0.15em;
  color: var(--color-primary);
  text-transform: uppercase;
  display: inline-block;
  margin-bottom: 0.5rem;
  font-weight: 600;
}

.editorial-tag {
  display: inline-block;
  font-size: 0.75rem;
  padding: 0.2rem 0.6rem;
  border: 1px solid var(--border-dark);
  color: var(--text-title);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  background: transparent;
}

.section-title {
  font-family: var(--font-serif);
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--text-title);
  line-height: 1.3;
  margin-bottom: 1rem;
  letter-spacing: -0.02em;
}

.section-subtitle {
  font-size: 1.05rem;
  color: var(--text-body);
  max-width: 680px;
  margin-bottom: 2.5rem;
}

/* Layout Containers */
.container {
  width: 100%;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Header & Navigation */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: rgba(250, 248, 243, 0.95);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border-color);
  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: 0.75rem;
}

.logo-symbol {
  width: 34px;
  height: 34px;
  background: var(--color-primary);
  color: var(--text-light);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 1.1rem;
  border-radius: var(--radius-sm);
}

.logo-text {
  display: flex;
  flex-direction: column;
}

.logo-title {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-title);
  letter-spacing: -0.01em;
  line-height: 1.1;
}

.logo-sub {
  font-size: 0.65rem;
  letter-spacing: 0.12em;
  color: var(--text-muted);
  text-transform: uppercase;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
}

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

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-primary);
  transition: width var(--transition-base);
}

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

.header-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.6rem;
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  transition: all var(--transition-base);
  cursor: pointer;
  border-radius: var(--radius-sm);
  white-space: nowrap;
}

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

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

.btn-outline {
  background-color: transparent;
  color: var(--text-title);
  border: 1px solid var(--text-title);
}

.btn-outline:hover {
  background-color: var(--text-title);
  color: var(--text-light);
}

.btn-accent {
  background-color: var(--color-accent);
  color: #ffffff;
  border: 1px solid var(--color-accent);
}

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

.mobile-toggle {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  width: 28px;
  height: 20px;
  cursor: pointer;
}

.mobile-toggle span {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--text-title);
  transition: transform var(--transition-base), opacity var(--transition-base);
}

/* Mobile Menu Drawer */
.mobile-nav-drawer {
  position: fixed;
  top: var(--header-height);
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--bg-main);
  z-index: 999;
  padding: 2rem 1.5rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transform: translateY(-100%);
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s ease;
  border-top: 1px solid var(--border-color);
}

.mobile-nav-drawer.active {
  transform: translateY(0);
  opacity: 1;
  visibility: visible;
}

.mobile-nav-links {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.mobile-nav-links a {
  font-family: var(--font-serif);
  font-size: 1.4rem;
  color: var(--text-title);
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 0.75rem;
}

/* HERO SECTION - Magazine Cover Style */
.hero-section {
  padding: 4rem 0 5rem;
  border-bottom: 1px solid var(--border-color);
  position: relative;
  background: radial-gradient(circle at 80% 20%, rgba(182, 154, 114, 0.06) 0%, transparent 60%);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 3.5rem;
  align-items: center;
}

.hero-meta {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.2rem;
  font-size: 0.85rem;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 0.75rem;
}

.hero-issue {
  font-family: var(--font-serif);
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: 0.1em;
}

.hero-title {
  font-family: var(--font-serif);
  font-size: 3.4rem;
  font-weight: 700;
  color: var(--text-title);
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-bottom: 1.5rem;
}

.hero-title span {
  color: var(--color-primary);
}

.hero-description {
  font-size: 1.15rem;
  color: var(--text-body);
  margin-bottom: 2.2rem;
  line-height: 1.75;
  max-width: 580px;
}

.hero-ctas {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  flex-wrap: wrap;
  margin-bottom: 2rem;
}

.hero-trust-list {
  display: flex;
  align-items: center;
  gap: 2rem;
  padding-top: 1.5rem;
  border-top: 1px dashed var(--border-color);
  font-size: 0.85rem;
  color: var(--text-body);
}

.hero-trust-item {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.hero-trust-item svg {
  color: var(--color-primary);
}

/* Original SVG Network Illustration */
.hero-visual {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  padding: 1.5rem;
  box-shadow: 0 12px 32px rgba(38, 38, 39, 0.04);
}

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

.visual-status {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--color-primary);
  font-weight: 600;
}

.status-dot {
  width: 8px;
  height: 8px;
  background-color: #2E7D32;
  border-radius: 50%;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(1.1); }
  100% { opacity: 1; transform: scale(1); }
}

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

/* STATS BAR */
.stats-bar {
  border-bottom: 1px solid var(--border-color);
  background-color: var(--bg-card);
  padding: 2.5rem 0;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
}

.stat-card {
  padding-left: 1.5rem;
  border-left: 2px solid var(--border-color);
  transition: border-color var(--transition-base);
}

.stat-card:hover {
  border-left-color: var(--color-primary);
}

.stat-number {
  font-family: var(--font-serif);
  font-size: 2.4rem;
  font-weight: 700;
  color: var(--text-title);
  line-height: 1;
  margin-bottom: 0.4rem;
}

.stat-label {
  font-size: 0.88rem;
  color: var(--text-muted);
}

/* SECTION COMMON */
.section {
  padding: 5rem 0;
  border-bottom: 1px solid var(--border-color);
}

/* ADVANTAGES SECTION - Staggered Layout */
.advantages-grid {
  display: flex;
  flex-direction: column;
  gap: 3.5rem;
}

.advantage-item {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
  padding: 2.5rem;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
}

.advantage-item:nth-child(even) {
  direction: rtl;
}

.advantage-item:nth-child(even) .advantage-content {
  direction: ltr;
}

.advantage-item:nth-child(even) .advantage-graphic {
  direction: ltr;
}

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

.advantage-title {
  font-family: var(--font-serif);
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--text-title);
  margin-bottom: 1rem;
}

.advantage-text {
  font-size: 1rem;
  color: var(--text-body);
  margin-bottom: 1.5rem;
  line-height: 1.7;
}

.advantage-features {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.advantage-feature {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.92rem;
  color: var(--text-title);
}

.advantage-feature svg {
  color: var(--color-primary);
  flex-shrink: 0;
}

.advantage-graphic {
  background-color: var(--bg-main);
  border: 1px solid var(--border-color);
  padding: 2rem;
  height: 100%;
  min-height: 240px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

/* GLOBAL NODES SECTION */
.nodes-container {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 3rem;
  align-items: center;
}

.nodes-map-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  padding: 2rem;
}

.nodes-list-card {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.node-region-box {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  padding: 1.25rem;
}

.node-region-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.75rem;
  border-bottom: 1px dashed var(--border-color);
  padding-bottom: 0.5rem;
}

.node-region-name {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-title);
}

.node-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.node-chip {
  font-size: 0.8rem;
  background-color: var(--bg-subtle);
  color: var(--text-body);
  padding: 0.25rem 0.6rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
}

/* AI & STREAMING SECTION */
.usecase-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.usecase-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  padding: 2rem;
  transition: transform var(--transition-base), border-color var(--transition-base);
  display: flex;
  flex-direction: column;
}

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

.usecase-icon {
  width: 48px;
  height: 48px;
  background-color: var(--bg-subtle);
  border: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.25rem;
  color: var(--color-primary);
}

.usecase-title {
  font-family: var(--font-serif);
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text-title);
  margin-bottom: 0.75rem;
}

.usecase-desc {
  font-size: 0.95rem;
  color: var(--text-body);
  line-height: 1.6;
}

/* PRICING SECTION - Minimalist Editorial */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  align-items: stretch;
}

.pricing-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  padding: 2.5rem 2rem;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: border-color var(--transition-base);
}

.pricing-card.featured {
  border: 2px solid var(--color-primary);
  background-color: #FFFFFF;
}

.featured-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background-color: var(--color-primary);
  color: var(--text-light);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  padding: 0.25rem 1rem;
  font-weight: 600;
  text-transform: uppercase;
}

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

.plan-name {
  font-family: var(--font-serif);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--text-title);
  margin-bottom: 0.4rem;
}

.plan-desc {
  font-size: 0.88rem;
  color: var(--text-muted);
}

.plan-price-wrap {
  display: flex;
  align-items: baseline;
  margin-top: 1rem;
}

.plan-currency {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-title);
}

.plan-amount {
  font-family: var(--font-serif);
  font-size: 2.8rem;
  font-weight: 700;
  color: var(--text-title);
  line-height: 1;
}

.plan-period {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-left: 0.4rem;
}

.pricing-features {
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
  margin-bottom: 2rem;
  flex-grow: 1;
}

.feature-item {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.92rem;
  color: var(--text-body);
}

.feature-item svg {
  color: var(--color-primary);
  flex-shrink: 0;
}

.pricing-note {
  font-size: 0.85rem;
  color: var(--text-muted);
  text-align: center;
  margin-top: 1.5rem;
  font-style: italic;
}

/* ARTICLES SECTION - Magazine Directory Style (TOC Style) */
.articles-toc {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
}

.toc-header {
  padding: 1.5rem 2rem;
  border-bottom: 1px solid var(--border-color);
  background-color: var(--bg-subtle);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.toc-title {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-title);
}

.toc-list {
  display: flex;
  flex-direction: column;
}

.toc-item {
  display: grid;
  grid-template-columns: 80px 1fr 140px 120px;
  align-items: center;
  padding: 1.25rem 2rem;
  border-bottom: 1px solid var(--border-color);
  transition: background-color var(--transition-base);
}

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

.toc-item:hover {
  background-color: var(--bg-accent-light);
}

.toc-num {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--color-primary);
}

.toc-article-title {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-title);
  line-height: 1.4;
  padding-right: 1.5rem;
}

.toc-category {
  font-size: 0.8rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.toc-action {
  text-align: right;
}

.toc-link {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--color-primary);
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
}

.toc-link:hover {
  color: var(--color-primary-hover);
  text-decoration: underline;
}

/* TESTIMONIALS */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.testimonial-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  padding: 2rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.quote-symbol {
  font-family: var(--font-serif);
  font-size: 3rem;
  line-height: 1;
  color: var(--color-accent);
  margin-bottom: -0.5rem;
}

.testimonial-text {
  font-size: 0.95rem;
  color: var(--text-body);
  line-height: 1.7;
  margin-bottom: 1.5rem;
  font-style: italic;
}

.testimonial-user {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  border-top: 1px dashed var(--border-color);
  padding-top: 1rem;
}

.user-avatar {
  width: 40px;
  height: 40px;
  background-color: var(--bg-subtle);
  border: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-serif);
  font-weight: 700;
  color: var(--color-primary);
}

.user-name {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-title);
}

.user-role {
  font-size: 0.78rem;
  color: var(--text-muted);
}

/* FAQ SECTION */
.faq-accordion {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.faq-item {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  transition: border-color var(--transition-base);
}

.faq-item[open] {
  border-color: var(--color-primary);
}

.faq-summary {
  padding: 1.25rem 1.5rem;
  font-family: var(--font-serif);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-title);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  list-style: none;
}

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

.faq-icon {
  font-size: 1.2rem;
  color: var(--color-primary);
  transition: transform var(--transition-base);
}

.faq-item[open] .faq-icon {
  transform: rotate(45deg);
}

.faq-content {
  padding: 0 1.5rem 1.5rem;
  font-size: 0.95rem;
  color: var(--text-body);
  line-height: 1.7;
  border-top: 1px dashed var(--border-color);
  padding-top: 1rem;
}

/* FOOTER */
.site-footer {
  background-color: #1F1F20;
  color: #D5D3CE;
  padding: 4rem 0 2rem;
  border-top: 1px solid var(--border-color);
  margin-top: auto;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr repeat(3, 1fr);
  gap: 3rem;
  margin-bottom: 3rem;
}

.footer-brand .logo-title {
  color: #FAF8F3;
}

.footer-brand p {
  font-size: 0.9rem;
  color: #A09E98;
  margin: 1rem 0 1.5rem;
  line-height: 1.6;
}

.footer-heading {
  font-family: var(--font-serif);
  font-size: 1.05rem;
  font-weight: 700;
  color: #FAF8F3;
  margin-bottom: 1.2rem;
  letter-spacing: 0.02em;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  font-size: 0.9rem;
}

.footer-links a {
  color: #A09E98;
}

.footer-links a:hover {
  color: #FAF8F3;
}

.footer-bottom {
  padding-top: 2rem;
  border-top: 1px solid #333335;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.82rem;
  color: #888680;
  flex-wrap: wrap;
  gap: 1rem;
}

.external-sites {
  display: flex;
  gap: 1.5rem;
  align-items: center;
}

.external-sites a {
  color: #B69A72;
}

.external-sites a:hover {
  text-decoration: underline;
}

/* ARTICLE TEMPLATE STYLES */
.article-page {
  padding: 3rem 0 5rem;
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 2rem;
}

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

.article-header {
  max-width: 860px;
  margin: 0 auto 3rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--border-color);
}

.article-h1 {
  font-family: var(--font-serif);
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--text-title);
  line-height: 1.25;
  margin-bottom: 1.2rem;
}

.article-meta {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.article-content {
  max-width: 860px;
  margin: 0 auto;
  font-size: 1.05rem;
  line-height: 1.85;
  color: var(--text-body);
}

.article-content h2 {
  font-family: var(--font-serif);
  font-size: 1.7rem;
  font-weight: 700;
  color: var(--text-title);
  margin: 2.5rem 0 1.2rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border-color);
}

.article-content h3 {
  font-family: var(--font-serif);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--text-title);
  margin: 2rem 0 1rem;
}

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

.article-content ul, .article-content ol {
  margin: 0 0 1.5rem 1.5rem;
  list-style-type: disc;
}

.article-content ol {
  list-style-type: decimal;
}

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

.article-callout {
  background-color: var(--bg-card);
  border-left: 4px solid var(--color-primary);
  border-top: 1px solid var(--border-color);
  border-right: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
  padding: 1.5rem;
  margin: 2rem 0;
}

.article-callout-title {
  font-family: var(--font-serif);
  font-weight: 700;
  color: var(--text-title);
  margin-bottom: 0.5rem;
}

.related-articles {
  max-width: 860px;
  margin: 4rem auto 0;
  padding-top: 3rem;
  border-top: 1px solid var(--border-color);
}

/* RESPONSIVE MEDIA QUERIES */

/* 1024px Layout */
@media (max-width: 1024px) {
  .hero-title {
    font-size: 2.8rem;
  }
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 3rem;
  }
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
  }
  .advantages-grid {
    gap: 2.5rem;
  }
  .advantage-item {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  .advantage-item:nth-child(even) {
    direction: ltr;
  }
  .nodes-container {
    grid-template-columns: 1fr;
  }
  .usecase-grid, .pricing-grid, .testimonials-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
  }
  .toc-item {
    grid-template-columns: 60px 1fr 100px;
  }
  .toc-category {
    display: none;
  }
}

/* 768px Layout */
@media (max-width: 768px) {
  .nav-links, .header-actions .btn-outline {
    display: none;
  }
  .mobile-toggle {
    display: flex;
  }
  .hero-title {
    font-size: 2.2rem;
  }
  .section-title {
    font-size: 1.8rem;
  }
  .usecase-grid, .pricing-grid, .testimonials-grid {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr;
  }
  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
  }
  .article-h1 {
    font-size: 1.8rem;
  }
}

/* 430px / 390px / 375px Mobile Adaptation */
@media (max-width: 430px) {
  .container {
    padding: 0 1rem;
  }
  .hero-title {
    font-size: 1.85rem;
  }
  .hero-ctas {
    flex-direction: column;
    width: 100%;
  }
  .hero-ctas .btn {
    width: 100%;
  }
  .stats-grid {
    grid-template-columns: 1fr;
  }
  .toc-item {
    grid-template-columns: 40px 1fr;
    gap: 0.5rem;
    padding: 1rem;
  }
  .toc-action {
    display: none;
  }
  .advantage-item {
    padding: 1.25rem;
  }
  .pricing-card {
    padding: 1.75rem 1.25rem;
  }
}