:root {
  --bg-page: #171b1d;
  --bg-surface: #242a2d;
  --bg-panel-alt: #1d2225;
  --text-main: #f0f2ef;
  --text-muted: #9aa6aa;
  --text-secondary: #879397;
  --border-line: #364045;
  --border-strong: #526068;
  --accent-primary: #e7a83e;
  --accent-hover: #f2b857;
  --accent-soft: rgba(231, 168, 62, 0.12);
  --status-success: #6eb58a;
  --status-success-soft: rgba(110, 181, 138, 0.14);
  --font-sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", "PingFang SC", "Microsoft YaHei", monospace;
  --max-width: 1180px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

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

body {
  font-family: var(--font-sans);
  background-color: var(--bg-page);
  background-image:
    linear-gradient(to right, rgba(135, 147, 151, 0.04) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(135, 147, 151, 0.04) 1px, transparent 1px);
  background-size: 32px 32px;
  color: var(--text-main);
  line-height: 1.65;
  overflow-x: hidden;
  padding-bottom: 68px;
}

@media (min-width: 768px) {
  body {
    padding-bottom: 0;
  }
}

a {
  color: var(--accent-primary);
  text-decoration: none;
  transition: color 0.12s ease, border-color 0.12s ease, background-color 0.12s ease;
}

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

a:focus-visible,
button:focus-visible,
summary:focus-visible {
  outline: 2px solid var(--accent-primary);
  outline-offset: 2px;
}

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

.page-wrap {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
}

/* Industrial Control Room Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(23, 27, 29, 0.94);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border-strong);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 64px;
  gap: 16px;
}

.brand-logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-main);
  min-height: 44px;
  letter-spacing: 0.02em;
}

.brand-logo:hover {
  color: var(--accent-primary);
}

.nav-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 44px;
  min-height: 44px;
  background: var(--bg-surface);
  border: 1px solid var(--border-strong);
  color: var(--text-main);
  cursor: pointer;
  padding: 8px;
}

.nav-toggle:active {
  transform: translateY(1px);
  background-color: var(--bg-panel-alt);
}

.site-nav {
  display: none;
  position: absolute;
  top: 64px;
  left: 0;
  right: 0;
  background-color: var(--bg-surface);
  border-bottom: 2px solid var(--accent-primary);
  padding: 16px 20px;
}

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

.nav-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 12px;
  color: var(--text-main);
  font-weight: 500;
  font-size: 0.95rem;
  border: 1px solid transparent;
}

.nav-link:hover {
  color: var(--accent-primary);
  background-color: var(--accent-soft);
  border-color: rgba(231, 168, 62, 0.3);
}

.nav-cta-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 18px;
  background-color: var(--accent-primary);
  color: #171b1d;
  font-weight: 700;
  font-size: 0.95rem;
  border: 1px solid var(--accent-primary);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.25);
}

.nav-cta-btn:hover {
  background-color: var(--accent-hover);
  color: #171b1d;
}

.nav-cta-btn:active {
  transform: translateY(1px);
  box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.35);
}

@media (min-width: 768px) {
  .nav-toggle {
    display: none;
  }
  .site-nav {
    display: flex;
    position: static;
    background: transparent;
    border-bottom: none;
    padding: 0;
    align-items: center;
    gap: 20px;
  }
  .nav-list {
    flex-direction: row;
    align-items: center;
    gap: 6px;
  }
}

/* Tactile Instrumentation Buttons */
.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 28px;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 10px 28px;
  background-color: var(--accent-primary);
  color: #171b1d;
  font-weight: 700;
  font-size: 1rem;
  border: 1px solid var(--accent-primary);
  box-shadow: 0 2px 0 #9a6918, inset 0 1px 0 rgba(255, 255, 255, 0.3);
  cursor: pointer;
}

.btn-primary:hover {
  background-color: var(--accent-hover);
  border-color: var(--accent-hover);
  color: #171b1d;
}

.btn-primary:active {
  transform: translateY(2px);
  box-shadow: 0 0 0 #9a6918, inset 0 2px 4px rgba(0, 0, 0, 0.35);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 10px 26px;
  background-color: var(--bg-surface);
  color: var(--text-main);
  font-weight: 600;
  font-size: 1rem;
  border: 1px solid var(--border-strong);
  box-shadow: 0 2px 0 #0d1012;
}

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

.btn-secondary:active {
  transform: translateY(2px);
  box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.4);
}

/* Status Badges & Monospace Telemetry Labels */
.status-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--status-success);
  background-color: var(--status-success-soft);
  border: 1px solid rgba(110, 181, 138, 0.4);
  padding: 4px 10px;
  margin-bottom: 14px;
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--status-success);
  display: inline-block;
}

.mono-tag {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-secondary);
  background-color: var(--bg-panel-alt);
  border: 1px solid var(--border-line);
  padding: 2px 8px;
}

/* Section Layout & Control Panels */
.section-block {
  padding: 64px 0;
  border-bottom: 1px solid var(--border-line);
}

.section-header {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 36px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--border-strong);
  position: relative;
}

.section-header::before {
  content: "";
  position: absolute;
  bottom: -1px;
  left: 0;
  width: 64px;
  height: 3px;
  background-color: var(--accent-primary);
}

@media (min-width: 768px) {
  .section-header {
    flex-direction: row;
    align-items: flex-end;
    justify-content: space-between;
  }
}

.section-title {
  font-size: 1.7rem;
  line-height: 1.25;
  font-weight: 700;
  color: var(--text-main);
  letter-spacing: -0.01em;
}

.section-desc {
  color: var(--text-muted);
  font-size: 0.98rem;
  max-width: 560px;
}

/* Hero Section - Operational Console */
.hero-section {
  padding: 48px 0 60px;
  border-bottom: 1px solid var(--border-strong);
  background: linear-gradient(180deg, #1c2225 0%, #171b1d 100%);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 36px;
  align-items: center;
}

@media (min-width: 920px) {
  .hero-grid {
    grid-template-columns: 1.12fr 0.88fr;
    gap: 44px;
  }
}

.hero-title {
  font-size: 2.1rem;
  line-height: 1.22;
  font-weight: 800;
  color: var(--text-main);
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}

@media (min-width: 768px) {
  .hero-title {
    font-size: 2.65rem;
  }
}

.hero-subtitle {
  font-size: 1.08rem;
  color: var(--text-muted);
  line-height: 1.65;
  max-width: 580px;
}

.hero-trust-bar {
  margin-top: 30px;
  padding-top: 20px;
  border-top: 1px solid var(--border-line);
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

@media (min-width: 600px) {
  .hero-trust-bar {
    grid-template-columns: repeat(3, 1fr);
  }
}

.trust-item {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-line);
  border-left: 3px solid var(--status-success);
  padding: 10px 14px;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.trust-item strong {
  display: block;
  font-family: var(--font-mono);
  color: var(--text-main);
  font-size: 0.9rem;
  margin-bottom: 2px;
}

.hero-visual-panel {
  border: 1px solid var(--border-strong);
  background-color: var(--bg-surface);
  padding: 18px;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.06), 0 10px 28px rgba(0, 0, 0, 0.35);
}

.panel-top-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: 12px;
  margin-bottom: 14px;
  border-bottom: 1px solid var(--border-line);
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--accent-primary);
  font-weight: 600;
}

/* Interactive Console Tabs (Layer 1.5 Functional Module Switcher) */
.console-tabs-wrap {
  margin-top: 36px;
  border: 1px solid var(--border-strong);
  background-color: var(--bg-surface);
}

.console-tab-bar {
  display: flex;
  flex-wrap: wrap;
  border-bottom: 1px solid var(--border-line);
  background-color: var(--bg-panel-alt);
}

.console-tab-btn {
  flex: 1 1 auto;
  min-height: 46px;
  padding: 10px 18px;
  background: transparent;
  border: none;
  border-right: 1px solid var(--border-line);
  border-bottom: 2px solid transparent;
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  text-align: left;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.console-tab-btn:hover {
  color: var(--text-main);
  background-color: rgba(255, 255, 255, 0.03);
}

.console-tab-btn[aria-selected="true"] {
  color: var(--accent-primary);
  background-color: var(--bg-surface);
  border-bottom-color: var(--accent-primary);
}

.console-tab-panel {
  padding: 24px;
  display: none;
}

.console-tab-panel.is-active {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

@media (min-width: 768px) {
  .console-tab-panel.is-active {
    grid-template-columns: repeat(3, 1fr);
  }
}

.spec-box {
  background-color: var(--bg-panel-alt);
  border: 1px solid var(--border-line);
  padding: 16px;
}

.spec-box-label {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--status-success);
  margin-bottom: 6px;
  display: block;
}

.spec-box-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 6px;
}

.spec-box-desc {
  font-size: 0.9rem;
  color: var(--text-muted);
}

/* Feature Matrix (4 Capability Modules) */
.feature-grid {
  display: grid;
  grid-template-columns: 1fr;
  border-top: 1px solid var(--border-strong);
  border-left: 1px solid var(--border-strong);
}

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

@media (min-width: 1024px) {
  .feature-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.feature-card {
  background-color: var(--bg-surface);
  padding: 26px 22px;
  border-right: 1px solid var(--border-strong);
  border-bottom: 1px solid var(--border-strong);
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.feature-icon-box {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--bg-panel-alt);
  color: var(--accent-primary);
  border: 1px solid var(--border-strong);
}

.feature-card-title {
  font-size: 1.12rem;
  font-weight: 700;
  color: var(--text-main);
}

.feature-card-text {
  font-size: 0.94rem;
  color: var(--text-muted);
}

/* Scenario Cards (4 Cards) */
.scenario-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

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

.scenario-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-strong);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.scenario-meta {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border-line);
  font-family: var(--font-mono);
  font-size: 0.84rem;
  color: var(--accent-primary);
  font-weight: 600;
}

.scenario-title {
  font-size: 1.18rem;
  font-weight: 700;
  color: var(--text-main);
}

.scenario-desc {
  font-size: 0.95rem;
  color: var(--text-muted);
}

/* Streaming & AI Support Matrix */
.platform-matrix {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  border-top: 1px solid var(--border-strong);
  border-left: 1px solid var(--border-strong);
}

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

@media (min-width: 1024px) {
  .platform-matrix {
    grid-template-columns: repeat(6, 1fr);
  }
}

.platform-cell {
  background-color: var(--bg-surface);
  border-right: 1px solid var(--border-strong);
  border-bottom: 1px solid var(--border-strong);
  padding: 20px 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.platform-name {
  font-size: 1.02rem;
  font-weight: 700;
  color: var(--text-main);
  display: flex;
  align-items: center;
  gap: 8px;
}

.platform-region {
  font-size: 0.84rem;
  color: var(--text-muted);
}

/* Pricing Section (Capability Levels) */
.pricing-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  align-items: stretch;
}

@media (min-width: 900px) {
  .pricing-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.pricing-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-strong);
  padding: 30px 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.pricing-card.is-featured {
  border: 2px solid var(--accent-primary);
  background-color: #283034;
  position: relative;
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.4);
}

.pricing-badge {
  display: inline-block;
  font-family: var(--font-mono);
  background-color: var(--accent-primary);
  color: #171b1d;
  font-size: 0.8rem;
  font-weight: 700;
  padding: 4px 10px;
  margin-bottom: 12px;
  align-self: flex-start;
}

.pricing-tier-name {
  font-size: 1.32rem;
  font-weight: 700;
  color: var(--text-main);
}

.pricing-audience {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-top: 4px;
}

.pricing-amount {
  margin: 22px 0;
  padding: 16px 0;
  border-top: 1px solid var(--border-line);
  border-bottom: 1px solid var(--border-line);
}

.price-num {
  font-family: var(--font-mono);
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--accent-primary);
}

.price-unit {
  font-size: 0.9rem;
  color: var(--text-muted);
}

.pricing-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 11px;
  margin-bottom: 26px;
}

.pricing-list li {
  font-size: 0.94rem;
  color: var(--text-main);
  padding-left: 20px;
  position: relative;
}

.pricing-list li::before {
  content: "▪";
  position: absolute;
  left: 2px;
  color: var(--status-success);
  font-weight: 700;
}

.pricing-btn {
  width: 100%;
  text-align: center;
}

/* Benefits Capability Modules */
.benefit-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

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

.benefit-item {
  background-color: var(--bg-surface);
  border-left: 4px solid var(--accent-primary);
  border-top: 1px solid var(--border-strong);
  border-right: 1px solid var(--border-strong);
  border-bottom: 1px solid var(--border-strong);
  padding: 24px;
}

.benefit-title {
  font-size: 1.12rem;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--text-main);
}

.benefit-text {
  font-size: 0.94rem;
  color: var(--text-muted);
}

/* FAQ Accordion Panels */
.faq-list {
  display: flex;
  flex-direction: column;
  border-top: 1px solid var(--border-strong);
}

.faq-item {
  background-color: var(--bg-surface);
  border-bottom: 1px solid var(--border-strong);
  border-left: 1px solid var(--border-strong);
  border-right: 1px solid var(--border-strong);
}

.faq-item[open] {
  background-color: #282f33;
}

.faq-question {
  width: 100%;
  min-height: 56px;
  padding: 18px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  font-size: 1.04rem;
  font-weight: 700;
  color: var(--text-main);
  cursor: pointer;
  list-style: none;
}

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

.faq-indicator {
  font-family: var(--font-mono);
  font-size: 1.2rem;
  color: var(--accent-primary);
  font-weight: 700;
  flex-shrink: 0;
}

.faq-answer {
  padding: 0 24px 20px;
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.7;
}

/* Final CTA Block */
.final-cta-section {
  padding: 60px 0;
  background-color: var(--bg-panel-alt);
  border-bottom: 1px solid var(--border-strong);
}

.final-cta-box {
  border: 2px solid var(--accent-primary);
  padding: 36px 28px;
  background-color: var(--bg-surface);
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: space-between;
  gap: 24px;
}

@media (min-width: 768px) {
  .final-cta-box {
    flex-direction: row;
    align-items: center;
    padding: 44px 40px;
  }
}

.final-cta-title {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 8px;
}

.final-cta-sub {
  font-size: 1rem;
  color: var(--text-muted);
}

/* Footer */
.site-footer {
  background-color: #121618;
  padding: 48px 0 36px;
  color: var(--text-muted);
  font-size: 0.9rem;
}

.footer-inner {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.footer-top {
  display: flex;
  flex-direction: column;
  gap: 16px;
  justify-content: space-between;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border-line);
}

@media (min-width: 768px) {
  .footer-top {
    flex-direction: row;
    align-items: center;
  }
}

.footer-links {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-links a {
  color: var(--text-main);
  font-weight: 500;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
}

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

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

/* Mobile Sticky Bottom CTA */
.mobile-sticky-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 90;
  background-color: var(--bg-surface);
  border-top: 2px solid var(--accent-primary);
  padding: 10px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  transform: translateY(100%);
  transition: transform 0.2s ease-out;
}

.mobile-sticky-bar.is-visible {
  transform: translateY(0);
}

.mobile-sticky-text {
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--text-main);
}

.mobile-sticky-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 20px;
  background-color: var(--accent-primary);
  color: #171b1d;
  font-weight: 700;
  font-size: 0.9rem;
  flex-shrink: 0;
}

@media (min-width: 768px) {
  .mobile-sticky-bar {
    display: none;
  }
}

/* Breadcrumb & Subpage Article Styles */
.breadcrumb-bar {
  padding: 14px 0;
  border-bottom: 1px solid var(--border-line);
  background-color: var(--bg-panel-alt);
  font-family: var(--font-mono);
  font-size: 0.86rem;
}

.breadcrumb-list {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

.breadcrumb-list li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--text-secondary);
}

.guide-card-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

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

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

.guide-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-strong);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.guide-thumb {
  border-bottom: 1px solid var(--border-line);
  background-color: var(--bg-panel-alt);
  padding: 20px;
  display: flex;
  justify-content: center;
  align-items: center;
}

.guide-body {
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  flex-grow: 1;
}

.guide-meta {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--status-success);
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.guide-title {
  font-size: 1.18rem;
  font-weight: 700;
  line-height: 1.35;
}

.guide-title a {
  color: var(--text-main);
}

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

.guide-excerpt {
  font-size: 0.925rem;
  color: var(--text-muted);
}

.guide-footer {
  padding: 0 24px 20px;
}

.article-layout {
  max-width: 820px;
  margin: 0 auto;
  padding: 48px 20px;
}

.article-header {
  padding-bottom: 24px;
  margin-bottom: 32px;
  border-bottom: 2px solid var(--accent-primary);
}

.article-h1 {
  font-size: 1.9rem;
  line-height: 1.28;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 14px;
}

@media (min-width: 768px) {
  .article-h1 {
    font-size: 2.3rem;
  }
}

.article-byline {
  font-family: var(--font-mono);
  font-size: 0.86rem;
  color: var(--text-muted);
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.article-content h2 {
  font-size: 1.42rem;
  font-weight: 700;
  color: var(--text-main);
  margin: 36px 0 14px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border-strong);
}

.article-content h3 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--accent-primary);
  margin: 24px 0 10px;
}

.article-content p {
  font-size: 1.02rem;
  color: var(--text-main);
  margin-bottom: 18px;
  line-height: 1.75;
}

.article-content ul,
.article-content ol {
  margin: 0 0 20px 22px;
}

.article-content li {
  margin-bottom: 8px;
  line-height: 1.7;
  color: var(--text-main);
}

.article-callout {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-strong);
  border-left: 4px solid var(--accent-primary);
  padding: 20px;
  margin: 24px 0;
}

.article-cta-box {
  margin-top: 40px;
  padding: 32px 24px;
  background-color: var(--bg-surface);
  border: 2px solid var(--accent-primary);
  display: flex;
  flex-direction: column;
  gap: 16px;
  align-items: flex-start;
}

.related-box {
  margin-top: 40px;
  padding-top: 28px;
  border-top: 1px solid var(--border-strong);
}

.related-list {
  list-style: none;
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin-top: 14px;
}

@media (min-width: 640px) {
  .related-list {
    grid-template-columns: repeat(3, 1fr);
  }
}

.related-list a {
  display: block;
  padding: 16px;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-strong);
  font-weight: 600;
  color: var(--text-main);
}

.related-list a:hover {
  border-color: var(--accent-primary);
  color: var(--accent-primary);
}