/* ==========================================================================
   扬帆云 (yangfanyun-jc.lat) - 工业极简设计系统 (Industrial Minimalist)
   ========================================================================== */

:root {
  --bg-primary: #0a0e14;
  --bg-secondary: #101620;
  --bg-surface: #151d2a;
  --bg-surface-hover: #1c2637;
  --bg-glass: rgba(16, 22, 32, 0.85);
  
  --border-dim: #232d3d;
  --border-bright: #364459;
  --border-highlight: #58a6ff;
  
  --text-primary: #f0f6fc;
  --text-secondary: #8b949e;
  --text-muted: #6e7681;
  
  --accent-cyan: #38bdf8;
  --accent-blue: #58a6ff;
  --accent-green: #3fb950;
  --accent-orange: #d29922;
  --accent-purple: #bc8cff;

  --font-sans: ui-rounded, "SF Pro Rounded", "PingFang SC", "Microsoft YaHei", -apple-system, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
  
  --header-height: 72px;
  --container-max: 1200px;
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 10px;
  --transition: 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

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

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

body {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-sans);
  line-height: 1.65;
  overflow-x: hidden;
  position: relative;
  min-height: 100vh;
  letter-spacing: -0.01em;
  background-image: 
    radial-gradient(ellipse 80% 50% at 50% -20%, rgba(56, 189, 248, 0.08), transparent 70%),
    linear-gradient(to right, rgba(35, 45, 61, 0.25) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(35, 45, 61, 0.25) 1px, transparent 1px);
  background-size: 100% 100%, 48px 48px, 48px 48px;
  background-position: top center, center top, center top;
}

/* 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;
  }
}

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

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

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

.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}

/* Typography Helpers */
.mono {
  font-family: var(--font-mono);
}

.sec-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.08em;
  color: var(--accent-cyan);
  background: rgba(56, 189, 248, 0.08);
  border: 1px solid rgba(56, 189, 248, 0.25);
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  margin-bottom: 16px;
  text-transform: uppercase;
}

.sec-tag::before {
  content: "";
  display: inline-block;
  width: 6px;
  height: 6px;
  background: var(--accent-cyan);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--accent-cyan);
}

.sec-title {
  font-size: clamp(1.75rem, 3.5vw, 2.5rem);
  font-weight: 700;
  line-height: 1.25;
  color: var(--text-primary);
  margin-bottom: 12px;
  letter-spacing: -0.02em;
}

.sec-desc {
  font-size: 1.0625rem;
  color: var(--text-secondary);
  max-width: 680px;
  line-height: 1.7;
}

/* Focus styles for keyboard navigation */
:focus-visible {
  outline: 2px solid var(--border-highlight);
  outline-offset: 3px;
}

/* ==========================================================================
   Header & Navigation
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-height);
  background: var(--bg-glass);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-dim);
}

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

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}

.brand-logo img {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
}

.brand-badge {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  padding: 2px 6px;
  border: 1px solid var(--border-bright);
  border-radius: var(--radius-sm);
  color: var(--accent-cyan);
  background: var(--bg-surface);
}

.nav-desktop {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
}

.nav-link {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  font-weight: 500;
  position: relative;
  padding: 6px 0;
}

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

.nav-link.highlight {
  color: var(--accent-cyan);
  font-family: var(--font-mono);
  font-size: 0.875rem;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 0.9375rem;
  font-weight: 600;
  padding: 10px 20px;
  border-radius: var(--radius-sm);
  transition: all var(--transition);
  text-align: center;
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(180deg, #58a6ff 0%, #1f6feb 100%);
  color: #ffffff;
  border: 1px solid #79c0ff;
  box-shadow: 0 1px 3px rgba(0,0,0,0.4), inset 0 1px 0 rgba(255,255,255,0.25);
}

.btn-primary:hover {
  background: linear-gradient(180deg, #79c0ff 0%, #388bfd 100%);
  box-shadow: 0 4px 14px rgba(56, 139, 253, 0.45);
  transform: translateY(-1px);
}

.btn-secondary {
  background: var(--bg-surface);
  color: var(--text-primary);
  border: 1px solid var(--border-bright);
}

.btn-secondary:hover {
  background: var(--bg-surface-hover);
  border-color: var(--border-highlight);
  color: var(--accent-cyan);
  transform: translateY(-1px);
}

.btn-sm {
  padding: 7px 14px;
  font-size: 0.8125rem;
}

/* Mobile Toggle */
.mobile-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border: 1px solid var(--border-dim);
  border-radius: var(--radius-sm);
  background: var(--bg-surface);
  color: var(--text-primary);
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
}

/* Mobile Nav Drawer */
.mobile-nav-panel {
  display: none;
  position: fixed;
  top: var(--header-height);
  left: 0;
  right: 0;
  background: var(--bg-primary);
  border-bottom: 1px solid var(--border-dim);
  padding: 24px;
  z-index: 99;
}

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

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

.mobile-nav-list a {
  display: block;
  font-size: 1.0625rem;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  background: var(--bg-surface);
  border: 1px solid var(--border-dim);
}

/* ==========================================================================
   Hero Section
   ========================================================================== */
.sec-hero {
  padding: clamp(48px, 8vw, 96px) 0 clamp(40px, 6vw, 80px);
  position: relative;
  border-bottom: 1px solid var(--border-dim);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 48px;
  align-items: center;
}

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

.hero-title {
  font-size: clamp(2.25rem, 4.5vw, 3.4rem);
  font-weight: 800;
  line-height: 1.18;
  letter-spacing: -0.03em;
  color: var(--text-primary);
  margin-bottom: 20px;
}

.hero-title .text-gradient {
  background: linear-gradient(135deg, #79c0ff 0%, #38bdf8 50%, #3fb950 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-desc {
  font-size: 1.125rem;
  color: var(--text-secondary);
  line-height: 1.75;
  margin-bottom: 32px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 36px;
}

.hero-metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  padding-top: 24px;
  border-top: 1px solid var(--border-dim);
}

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

.metric-val {
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
}

.metric-val.green { color: var(--accent-green); }
.metric-val.cyan { color: var(--accent-cyan); }
.metric-val.blue { color: var(--accent-blue); }

.metric-label {
  font-size: 0.8125rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
  text-transform: uppercase;
  margin-top: 2px;
}

/* Dynamic Interactive Tech Card (Desktop) */
.hero-card-wrapper {
  position: relative;
}

.hero-tech-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-bright);
  border-radius: var(--radius-md);
  box-shadow: 0 20px 40px rgba(0,0,0,0.5), inset 0 1px 0 rgba(255,255,255,0.05);
  overflow: hidden;
  position: relative;
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  background: rgba(16, 22, 32, 0.9);
  border-bottom: 1px solid var(--border-dim);
}

.card-dots {
  display: flex;
  gap: 6px;
}

.dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}
.dot-red { background: #f85149; }
.dot-yellow { background: #d29922; }
.dot-green { background: #3fb950; }

.card-terminal-title {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  letter-spacing: 0.05em;
}

.card-body {
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.circuit-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 14px;
  background: var(--bg-primary);
  border: 1px solid var(--border-dim);
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 0.875rem;
}

.circuit-name {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text-primary);
}

.status-indicator {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-green);
  box-shadow: 0 0 8px var(--accent-green);
}

.circuit-ping {
  color: var(--accent-cyan);
  font-weight: 600;
}

.circuit-tag {
  font-size: 0.6875rem;
  color: var(--text-muted);
  background: var(--bg-surface);
  padding: 2px 6px;
  border-radius: 2px;
  border: 1px solid var(--border-dim);
}

.card-foot-notice {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  line-height: 1.5;
  border-top: 1px dashed var(--border-dim);
  padding-top: 12px;
}

/* ==========================================================================
   Advantages Section
   ========================================================================== */
.sec-advantages {
  padding: 80px 0;
  border-bottom: 1px solid var(--border-dim);
}

.adv-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 24px;
  margin-top: 48px;
}

.adv-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-dim);
  border-radius: var(--radius-md);
  padding: 32px 28px;
  position: relative;
  transition: all var(--transition);
  display: flex;
  flex-direction: column;
}

.adv-card:hover {
  border-color: var(--border-bright);
  background: var(--bg-surface-hover);
  transform: translateY(-2px);
  box-shadow: 0 12px 24px rgba(0,0,0,0.3);
}

.adv-num {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--accent-cyan);
  letter-spacing: 0.1em;
  margin-bottom: 16px;
}

.adv-icon-wrap {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(56, 189, 248, 0.08);
  border: 1px solid rgba(56, 189, 248, 0.2);
  border-radius: var(--radius-sm);
  color: var(--accent-cyan);
  margin-bottom: 20px;
}

.adv-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 10px;
}

.adv-text {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ==========================================================================
   Streaming & AI Support Section
   ========================================================================== */
.sec-media-ai {
  padding: 80px 0;
  border-bottom: 1px solid var(--border-dim);
  background: var(--bg-secondary);
}

.media-ai-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
  margin-top: 48px;
}

.media-item {
  background: var(--bg-surface);
  border: 1px solid var(--border-dim);
  border-radius: var(--radius-md);
  padding: 24px;
  transition: border-color var(--transition);
}

.media-item:hover {
  border-color: var(--border-bright);
}

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

.media-title {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--text-primary);
}

.media-badge {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  padding: 2px 8px;
  border-radius: 2px;
  background: rgba(63, 185, 80, 0.12);
  color: var(--accent-green);
  border: 1px solid rgba(63, 185, 80, 0.3);
}

.media-desc {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 16px;
}

.media-condition {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  border-top: 1px solid var(--border-dim);
  padding-top: 10px;
}

.media-disclaimer {
  margin-top: 32px;
  padding: 16px 20px;
  border-radius: var(--radius-sm);
  background: rgba(210, 153, 34, 0.08);
  border: 1px solid rgba(210, 153, 34, 0.25);
  font-size: 0.875rem;
  color: #e3b341;
  line-height: 1.6;
}

/* ==========================================================================
   Pricing Section
   ========================================================================== */
.sec-pricing {
  padding: 80px 0;
  border-bottom: 1px solid var(--border-dim);
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
  margin-top: 48px;
}

.price-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-dim);
  border-radius: var(--radius-md);
  padding: 32px 24px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: all var(--transition);
}

.price-card:hover {
  border-color: var(--border-bright);
  transform: translateY(-3px);
  box-shadow: 0 16px 32px rgba(0,0,0,0.35);
}

.price-card.featured {
  border-color: var(--accent-blue);
  background: linear-gradient(180deg, #182333 0%, #151d2a 100%);
  box-shadow: 0 0 0 1px var(--accent-blue), 0 20px 40px rgba(0,0,0,0.5);
}

.featured-flag {
  position: absolute;
  top: -12px;
  right: 20px;
  background: var(--accent-blue);
  color: #ffffff;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 700;
  padding: 2px 10px;
  border-radius: var(--radius-sm);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.price-name {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 6px;
}

.price-cycle {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--text-muted);
  margin-bottom: 20px;
}

.price-figure {
  display: flex;
  align-items: baseline;
  gap: 4px;
  margin-bottom: 20px;
}

.price-currency {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--accent-cyan);
}

.price-amount {
  font-family: var(--font-mono);
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--text-primary);
  line-height: 1;
}

.price-period {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.price-traffic {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(56, 189, 248, 0.08);
  border: 1px solid rgba(56, 189, 248, 0.2);
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--accent-cyan);
  margin-bottom: 24px;
}

.price-features {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 32px;
  flex-grow: 1;
}

.price-feature-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.price-feature-item::before {
  content: "✓";
  font-family: var(--font-mono);
  color: var(--accent-green);
  font-weight: bold;
}

.price-btn {
  width: 100%;
}

.pricing-note {
  margin-top: 32px;
  text-align: center;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--text-muted);
}

/* ==========================================================================
   Comprehensive Technical Narrative Section (1500-2000 Chinese Chars)
   ========================================================================== */
.sec-overview {
  padding: 80px 0;
  border-bottom: 1px solid var(--border-dim);
  background: var(--bg-secondary);
}

.overview-box {
  background: var(--bg-surface);
  border: 1px solid var(--border-dim);
  border-radius: var(--radius-md);
  padding: clamp(24px, 5vw, 48px);
}

.overview-content {
  color: var(--text-secondary);
  font-size: 1rem;
  line-height: 1.85;
}

.overview-content h3 {
  font-size: 1.25rem;
  color: var(--text-primary);
  margin-top: 28px;
  margin-bottom: 12px;
  font-weight: 700;
}

.overview-content h3:first-child {
  margin-top: 0;
}

.overview-content p {
  margin-bottom: 16px;
}

/* ==========================================================================
   FAQ Section
   ========================================================================== */
.sec-faq {
  padding: 80px 0;
  border-bottom: 1px solid var(--border-dim);
}

.faq-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-top: 48px;
  max-width: 900px;
}

.faq-item {
  background: var(--bg-surface);
  border: 1px solid var(--border-dim);
  border-radius: var(--radius-sm);
  overflow: hidden;
  transition: border-color var(--transition);
}

.faq-item:hover {
  border-color: var(--border-bright);
}

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  text-align: left;
  font-size: 1.0625rem;
  font-weight: 600;
  color: var(--text-primary);
  background: transparent;
}

.faq-icon {
  font-family: var(--font-mono);
  font-size: 1.25rem;
  color: var(--accent-cyan);
  transition: transform var(--transition);
}

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

.faq-answer {
  display: none;
  padding: 0 24px 20px 24px;
  font-size: 0.9375rem;
  color: var(--text-secondary);
  line-height: 1.75;
  border-top: 1px solid var(--border-dim);
  padding-top: 16px;
}

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

/* ==========================================================================
   Knowledge Preview Section (Homepage Entrance)
   ========================================================================== */
.sec-knowledge-preview {
  padding: 80px 0;
  border-bottom: 1px solid var(--border-dim);
}

.preview-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 24px;
  margin-top: 48px;
}

.preview-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-dim);
  border-radius: var(--radius-md);
  padding: 24px;
  display: flex;
  flex-direction: column;
  transition: all var(--transition);
}

.preview-card:hover {
  border-color: var(--border-bright);
  transform: translateY(-2px);
}

.preview-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-bottom: 12px;
}

.preview-title {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 10px;
  line-height: 1.4;
}

.preview-title a:hover {
  color: var(--accent-cyan);
}

.preview-excerpt {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 20px;
  flex-grow: 1;
}

.preview-link {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--accent-cyan);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 600;
}

.preview-link:hover {
  text-decoration: underline;
}

.preview-more-box {
  margin-top: 40px;
  text-align: center;
}

/* ==========================================================================
   Hidden Customer Review Section (Per strict instruction)
   ========================================================================== */
.sec-reviews {
  display: none !important;
}

/* ==========================================================================
   Right-Side Floating Chapter Navigation
   ========================================================================== */
.side-nav-controller {
  position: fixed;
  right: 24px;
  top: 50%;
  transform: translateY(-50%);
  z-index: 90;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  background: var(--bg-glass);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid var(--border-bright);
  padding: 10px 6px;
  border-radius: var(--radius-lg);
  box-shadow: 0 8px 24px rgba(0,0,0,0.4);
}

.side-btn {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  background: var(--bg-surface);
  border: 1px solid var(--border-dim);
  color: var(--text-primary);
  transition: all var(--transition);
}

.side-btn:hover:not(:disabled) {
  background: var(--bg-surface-hover);
  border-color: var(--border-highlight);
  color: var(--accent-cyan);
}

.side-btn:disabled {
  opacity: 0.3;
  cursor: not-allowed;
  border-color: var(--border-dim);
}

.side-btn img, .side-btn svg {
  width: 18px;
  height: 18px;
}

.side-indicator {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  color: var(--accent-cyan);
  padding: 4px 0;
  text-align: center;
  font-weight: 600;
  user-select: none;
}

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer {
  background: var(--bg-primary);
  border-top: 1px solid var(--border-dim);
  padding: 60px 0 40px;
}

.footer-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 24px;
  padding-bottom: 32px;
  border-bottom: 1px solid var(--border-dim);
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.footer-nav {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
  flex-wrap: wrap;
}

.footer-nav a {
  font-size: 0.9375rem;
  color: var(--text-secondary);
}

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

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  padding-top: 28px;
  font-size: 0.8125rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

/* ==========================================================================
   Knowledge Base & Article Layout Styles
   ========================================================================== */
.article-header {
  padding: 48px 0 32px;
  border-bottom: 1px solid var(--border-dim);
  margin-bottom: 40px;
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--text-muted);
  margin-bottom: 16px;
  flex-wrap: wrap;
}

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

.article-title {
  font-size: clamp(1.85rem, 3.5vw, 2.5rem);
  font-weight: 800;
  color: var(--text-primary);
  line-height: 1.3;
  margin-bottom: 20px;
}

.article-meta-bar {
  display: flex;
  align-items: center;
  gap: 20px;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--text-muted);
  flex-wrap: wrap;
}

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

.article-body {
  max-width: 860px;
  margin: 0 auto;
  font-size: 1.0625rem;
  line-height: 1.85;
  color: #c9d1d9;
}

.article-body h2 {
  font-size: 1.5rem;
  color: var(--text-primary);
  margin-top: 48px;
  margin-bottom: 18px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border-dim);
  font-weight: 700;
}

.article-body h3 {
  font-size: 1.25rem;
  color: var(--text-primary);
  margin-top: 32px;
  margin-bottom: 14px;
  font-weight: 600;
}

.article-body p {
  margin-bottom: 20px;
}

.article-body ul, .article-body ol {
  margin-bottom: 24px;
  padding-left: 24px;
}

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

.article-body strong {
  color: var(--text-primary);
}

.article-body blockquote {
  border-left: 4px solid var(--accent-cyan);
  padding: 16px 20px;
  background: var(--bg-surface);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: 24px 0;
  color: var(--text-secondary);
  font-size: 0.9375rem;
}

.article-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 28px 0;
  font-size: 0.875rem;
  background: var(--bg-surface);
  border-radius: var(--radius-sm);
  overflow: hidden;
  border: 1px solid var(--border-dim);
}

.article-body th, .article-body td {
  padding: 12px 16px;
  text-align: left;
  border: 1px solid var(--border-dim);
}

.article-body th {
  background: var(--bg-secondary);
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-weight: 600;
}

.article-callout {
  margin: 40px 0;
  padding: 24px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, rgba(88, 166, 255, 0.08) 0%, rgba(56, 189, 248, 0.04) 100%);
  border: 1px solid var(--border-highlight);
}

.article-callout h4 {
  font-size: 1.125rem;
  color: var(--text-primary);
  margin-bottom: 10px;
}

.article-callout p {
  margin-bottom: 16px;
  font-size: 0.9375rem;
  color: var(--text-secondary);
}

/* ==========================================================================
   Responsive Media Queries
   ========================================================================== */
@media (max-width: 992px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 36px;
  }
}

@media (max-width: 768px) {
  .nav-desktop {
    display: none;
  }
  .mobile-toggle {
    display: flex;
  }
  .hero-metrics {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  .side-nav-controller {
    right: 12px;
    bottom: 24px;
    top: auto;
    transform: none;
    flex-direction: row;
    padding: 6px 10px;
  }
  .side-indicator {
    padding: 0 6px;
  }
  .footer-top {
    flex-direction: column;
    align-items: flex-start;
  }
  .footer-nav {
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
  }
}