/* ==========================================================================
   BoostNet - Laser-Cavity Optical Amplifier UI Architecture
   Deep Photon-Darkroom Palette:
     - True OLED Black: #000000
     - Cryogenic Amplifier Cyan: #00f0ff
     - Laser Coherent Violet: #7c3aed
     - Ultra-pure Photon White: #ffffff
   Strictly Zero Generic AI Icons. Monolithic Optic-Chamber Layout.
   ========================================================================== */

:root {
  /* Default: Cleanroom Optical Lab (Light Mode) */
  --bg-primary: #f8fafc;
  --bg-secondary: #f1f5f9;
  --bg-chamber: #ffffff;
  --bg-glass: rgba(255, 255, 255, 0.85);

  --text-primary: #090d16;
  --text-secondary: #334155;
  --text-muted: #64748b;
  --text-inverse: #ffffff;

  --cyan: #0284c7;
  --cyan-glow: rgba(2, 132, 199, 0.2);
  --cyan-border: rgba(2, 132, 199, 0.4);

  --violet: #6d28d9;
  --violet-glow: rgba(109, 40, 217, 0.2);

  --laser-beam: linear-gradient(90deg, transparent, #0284c7 35%, #6d28d9 70%, transparent);
  --laser-accent: linear-gradient(135deg, #0284c7 0%, #6d28d9 100%);
  --laser-accent-hover: linear-gradient(135deg, #0369a1 0%, #5b21b6 100%);

  --border-subtle: #e2e8f0;
  --border-laser: rgba(2, 132, 199, 0.25);
  --border-focus: #0284c7;

  --tube-line: rgba(2, 132, 199, 0.15);
  --grid-pattern: rgba(148, 163, 184, 0.08);

  --font-mono: "SF Mono", "JetBrains Mono", Consolas, "Liberation Mono", Menlo, Courier, monospace;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;

  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 14px;
  --radius-full: 9999px;

  --transition-laser: 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Deep Photon-Darkroom Palette (Dark Mode) */
[data-theme="dark"] {
  --bg-primary: #000000;          /* True OLED Black */
  --bg-secondary: #05070e;
  --bg-chamber: #070913;
  --bg-glass: rgba(5, 7, 14, 0.85);

  --text-primary: #ffffff;        /* Ultra-pure Photon White */
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --text-inverse: #000000;

  --cyan: #00f0ff;                /* Cryogenic Amplifier Cyan */
  --cyan-glow: rgba(0, 240, 255, 0.35);
  --cyan-border: rgba(0, 240, 255, 0.45);

  --violet: #7c3aed;              /* Laser Coherent Violet */
  --violet-glow: rgba(124, 58, 237, 0.4);

  --laser-beam: linear-gradient(90deg, transparent, #00f0ff 30%, #7c3aed 70%, transparent);
  --laser-accent: linear-gradient(135deg, #00f0ff 0%, #7c3aed 100%);
  --laser-accent-hover: linear-gradient(135deg, #38bdf8 0%, #9333ea 100%);

  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-laser: rgba(0, 240, 255, 0.28);
  --border-focus: #00f0ff;

  --tube-line: rgba(0, 240, 255, 0.18);
  --grid-pattern: rgba(0, 240, 255, 0.035);
}

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

html {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  scroll-behavior: smooth;
  scroll-padding-top: 88px;
  -webkit-font-smoothing: antialiased;
}

body {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  transition: background-color var(--transition-laser), color var(--transition-laser);
  overflow-x: hidden;
  background-image: 
    radial-gradient(circle at 50% 0%, var(--violet-glow) 0%, transparent 45%),
    linear-gradient(var(--grid-pattern) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-pattern) 1px, transparent 1px);
  background-size: 100% 100%, 48px 48px, 48px 48px;
  background-position: top center, 0 0, 0 0;
}

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

/* Central Quartz Laser Conduit (Spine Graphic Effect) */
.quartz-tube-spine {
  position: fixed;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 1px;
  height: 100vh;
  background: var(--laser-beam);
  opacity: 0.15;
  pointer-events: none;
  z-index: 0;
}

/* Container */
.container {
  width: 100%;
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 28px;
  position: relative;
  z-index: 1;
}

/* Monospace Optical Telemetry Bar / Chips */
.telemetry-chip {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--cyan);
  background: rgba(0, 240, 255, 0.06);
  border: 1px solid var(--border-laser);
  padding: 5px 14px;
  border-radius: var(--radius-sm);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.pulse-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 10px var(--cyan);
  animation: pulse-laser 2s infinite ease-in-out;
}

@keyframes pulse-laser {
  0%, 100% { opacity: 0.3; transform: scale(0.9); }
  50% { opacity: 1; transform: scale(1.3); }
}

/* Header & Optical Navigation */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--bg-glass);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-subtle);
  transition: all var(--transition-laser);
}

.site-header::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: var(--laser-beam);
  opacity: 0.6;
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: 1.4rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.brand-chamber-symbol {
  width: 38px;
  height: 38px;
  border: 1px solid var(--cyan-border);
  background: rgba(0, 240, 255, 0.08);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  box-shadow: 0 0 15px var(--cyan-glow);
}

.brand-chamber-symbol svg {
  width: 22px;
  height: 22px;
  color: var(--cyan);
}

.brand-name-text {
  background: var(--laser-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  font-weight: 900;
}

.nav-catalogue {
  display: flex;
  align-items: center;
  gap: 26px;
  list-style: none;
}

.nav-item-link {
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--text-secondary);
  padding: 8px 4px;
  position: relative;
  transition: color var(--transition-laser);
}

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

.nav-item-link::after {
  content: "";
  position: absolute;
  bottom: -2px;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 2px;
  background: var(--cyan);
  box-shadow: 0 0 8px var(--cyan);
  transition: width var(--transition-laser);
}

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

.nav-item-link.badge-news {
  position: relative;
  color: var(--violet);
  font-weight: 600;
}

.nav-item-link.badge-news:hover {
  color: var(--cyan);
}

.nav-item-link.badge-news::before {
  content: "NEW";
  position: absolute;
  top: -6px;
  right: -24px;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  font-weight: 800;
  background: var(--violet);
  color: #fff;
  padding: 1px 5px;
  border-radius: var(--radius-sm);
  box-shadow: 0 0 8px var(--violet-glow);
}

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

/* Laser-Cavity Refined Day/Night Switcher Button */
.theme-switch-btn {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background: rgba(124, 58, 237, 0.08);
  border: 1px solid var(--border-laser);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-primary);
  position: relative;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  transition: all var(--transition-laser);
}

.theme-switch-btn:hover {
  border-color: var(--cyan);
  box-shadow: 0 0 16px var(--cyan-glow);
  transform: translateY(-1px);
}

.theme-switch-btn svg {
  width: 20px;
  height: 20px;
  position: absolute;
  transition: transform var(--transition-laser), opacity var(--transition-laser);
}

.icon-sun {
  opacity: 0;
  transform: scale(0.6) rotate(90deg);
}

.icon-moon {
  opacity: 1;
  transform: scale(1) rotate(0deg);
}

[data-theme="dark"] .icon-sun {
  opacity: 1;
  transform: scale(1) rotate(0deg);
  color: var(--cyan);
}

[data-theme="dark"] .icon-moon {
  opacity: 0;
  transform: scale(0.6) rotate(-90deg);
}

/* Laser CTA Buttons */
.btn-laser {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 11px 24px;
  font-size: 0.94rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--transition-laser);
  position: relative;
  overflow: hidden;
  white-space: nowrap;
}

.btn-laser-primary {
  background: var(--laser-accent);
  color: #ffffff;
  border-color: rgba(255, 255, 255, 0.2);
  box-shadow: 0 0 20px var(--cyan-glow), 0 0 35px var(--violet-glow);
}

.btn-laser-primary:hover {
  background: var(--laser-accent-hover);
  box-shadow: 0 0 30px var(--cyan), 0 0 50px var(--violet);
  transform: translateY(-2px);
  color: #ffffff;
}

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

.btn-laser-ghost:hover {
  background: rgba(0, 240, 255, 0.06);
  border-color: var(--cyan);
  color: var(--cyan);
  box-shadow: 0 0 15px var(--cyan-glow);
  transform: translateY(-2px);
}

.btn-lg {
  padding: 15px 36px;
  font-size: 1.05rem;
}

.btn-block {
  width: 100%;
}

/* Sections Base */
.optic-section {
  padding: 100px 0;
  position: relative;
}

.optic-section-alt {
  background: var(--bg-secondary);
}

.chamber-header {
  text-align: center;
  max-width: 820px;
  margin: 0 auto 64px auto;
}

.chamber-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--cyan);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 16px;
}

.chamber-title {
  font-size: 2.6rem;
  font-weight: 900;
  line-height: 1.22;
  letter-spacing: -0.03em;
  color: var(--text-primary);
  margin-bottom: 18px;
}

.chamber-desc {
  font-size: 1.12rem;
  color: var(--text-secondary);
  line-height: 1.75;
}

/* Hero Section (Optical Amplifier Chamber) */
.hero-chamber {
  padding: 110px 0 90px 0;
  position: relative;
  text-align: center;
  overflow: hidden;
}

.hero-glow-conduit {
  position: absolute;
  top: 20%;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 350px;
  background: radial-gradient(ellipse at center, var(--cyan-glow) 0%, var(--violet-glow) 50%, transparent 75%);
  filter: blur(70px);
  z-index: -1;
  pointer-events: none;
}

.hero-main-title {
  font-size: 3.8rem;
  font-weight: 900;
  line-height: 1.15;
  letter-spacing: -0.04em;
  margin: 22px auto;
  max-width: 980px;
}

.hero-main-title .gradient-photon {
  background: var(--laser-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  text-shadow: 0 0 40px var(--cyan-glow);
}

.hero-intro-text {
  font-size: 1.25rem;
  color: var(--text-secondary);
  line-height: 1.8;
  max-width: 820px;
  margin: 0 auto 38px auto;
}

.hero-cta-chamber {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  margin-bottom: 60px;
  flex-wrap: wrap;
}

/* Oscilloscope / Route Real-Time Jitter Flatline Widget */
.oscilloscope-chamber {
  background: var(--bg-chamber);
  border: 1px solid var(--border-laser);
  border-radius: var(--radius-md);
  padding: 26px 32px;
  max-width: 1040px;
  margin: 0 auto;
  box-shadow: 0 0 35px rgba(0, 0, 0, 0.4), inset 0 0 20px rgba(0, 240, 255, 0.03);
  position: relative;
}

.oscilloscope-top-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-subtle);
  padding-bottom: 14px;
  margin-bottom: 20px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-muted);
}

.route-telemetry-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.route-telemetry-cell {
  background: rgba(0, 240, 255, 0.02);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 16px;
  text-align: left;
  transition: all var(--transition-laser);
  cursor: pointer;
  position: relative;
  overflow: hidden;
}

.route-telemetry-cell:hover {
  border-color: var(--cyan);
  background: rgba(0, 240, 255, 0.06);
  box-shadow: 0 0 20px var(--cyan-glow);
  transform: translateY(-2px);
}

.route-name {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 6px;
}

.route-wave-display {
  height: 32px;
  width: 100%;
  margin: 10px 0;
  display: flex;
  align-items: center;
  position: relative;
}

/* Real-Time Jitter Line that flattens into needle-sharp steady laser beam on hover */
.jitter-line {
  width: 100%;
  height: 2px;
  background: repeating-linear-gradient(90deg, var(--cyan) 0px, var(--cyan) 6px, transparent 6px, transparent 10px);
  animation: jitter-oscillation 1.2s infinite ease-in-out alternate;
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

.route-telemetry-cell:hover .jitter-line {
  background: #00f0ff;
  height: 2px;
  animation: none;
  box-shadow: 0 0 12px #00f0ff, 0 0 24px var(--cyan);
}

@keyframes jitter-oscillation {
  0% { transform: translateY(-2px) scaleY(1.5); }
  50% { transform: translateY(3px) scaleY(0.7); }
  100% { transform: translateY(-3px) scaleY(1.8); }
}

.route-rtt-stat {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--cyan);
  display: flex;
  justify-content: space-between;
}

/* Stark Monolithic Core Advantages Grid (3 Monolithic Cards) */
.chamber-grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.chamber-cell {
  background: var(--bg-chamber);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 38px 30px;
  position: relative;
  display: flex;
  flex-direction: column;
  transition: all var(--transition-laser);
}

.chamber-cell::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--laser-beam);
  opacity: 0;
  transition: opacity var(--transition-laser);
}

.chamber-cell:hover {
  border-color: var(--cyan-border);
  box-shadow: 0 0 30px var(--cyan-glow);
  transform: translateY(-4px);
}

.chamber-cell:hover::before {
  opacity: 1;
}

.chamber-icon-box {
  width: 54px;
  height: 54px;
  border: 1px solid var(--border-laser);
  border-radius: var(--radius-sm);
  background: rgba(0, 240, 255, 0.05);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
  color: var(--cyan);
}

.chamber-icon-box svg {
  width: 28px;
  height: 28px;
}

.chamber-cell-title {
  font-size: 1.4rem;
  font-weight: 800;
  margin-bottom: 14px;
  color: var(--text-primary);
}

.chamber-cell-body {
  font-size: 0.98rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 24px;
  flex-grow: 1;
}

.chamber-meta-specs {
  list-style: none;
  border-top: 1px solid var(--border-subtle);
  padding-top: 20px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
}

.chamber-meta-specs li {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text-muted);
}

.chamber-meta-specs li span {
  color: var(--cyan);
}

/* Capabilities Showcase: Streaming & AI Optical Chambers */
.amplification-split {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}

.amplification-chamber {
  background: var(--bg-chamber);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 44px 38px;
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: all var(--transition-laser);
}

.amplification-chamber:hover {
  border-color: var(--violet);
  box-shadow: 0 0 35px var(--violet-glow);
  transform: translateY(-4px);
}

.amp-top-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--violet);
  background: rgba(124, 58, 237, 0.1);
  border: 1px solid rgba(124, 58, 237, 0.3);
  padding: 4px 12px;
  border-radius: var(--radius-sm);
  margin-bottom: 20px;
  white-space: nowrap;
}

.amp-chamber-heading {
  font-size: 1.7rem;
  font-weight: 800;
  margin-bottom: 16px;
  color: var(--text-primary);
}

.amp-chamber-desc {
  font-size: 1.02rem;
  color: var(--text-secondary);
  line-height: 1.75;
  margin-bottom: 30px;
}

.target-service-matrix {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 32px;
}

.matrix-cell {
  font-family: var(--font-mono);
  font-size: 0.86rem;
  font-weight: 600;
  padding: 8px 14px;
  border: 1px solid var(--border-subtle);
  background: var(--bg-primary);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 8px;
  transition: all var(--transition-laser);
}

.matrix-cell:hover {
  border-color: var(--cyan);
  color: var(--cyan);
  box-shadow: 0 0 12px var(--cyan-glow);
}

.optical-telemetry-footer {
  border-top: 1px solid var(--border-subtle);
  padding-top: 20px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* Realistic Pricing Architecture */
.pricing-matrix {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
  align-items: stretch;
}

.pricing-module {
  background: var(--bg-chamber);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 42px 34px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: all var(--transition-laser);
}

.pricing-module:hover {
  border-color: var(--cyan-border);
  box-shadow: 0 0 30px var(--cyan-glow);
  transform: translateY(-6px);
}

.pricing-module.recommended {
  border: 2px solid var(--cyan);
  box-shadow: 0 0 40px var(--cyan-glow);
  transform: scale(1.02);
}

.pricing-module.recommended:hover {
  transform: scale(1.02) translateY(-6px);
}

.recommended-indicator {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--laser-accent);
  color: #ffffff;
  padding: 4px 16px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.05em;
  border-radius: var(--radius-sm);
  box-shadow: 0 0 15px var(--cyan);
  white-space: nowrap;
  width: max-content;
  line-height: 1.4;
  z-index: 5;
}

.plan-header {
  margin-bottom: 24px;
}

.plan-tier-label {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--cyan);
  text-transform: uppercase;
  margin-bottom: 8px;
}

.plan-title {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 8px;
}

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

.plan-cost-display {
  display: flex;
  align-items: baseline;
  gap: 4px;
  margin: 22px 0;
}

.currency-mark {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--cyan);
}

.exact-price {
  font-size: 3.4rem;
  font-weight: 900;
  line-height: 1;
  font-family: var(--font-mono);
  color: var(--text-primary);
}

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

.plan-spec-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin: 24px 0 36px 0;
  flex-grow: 1;
  font-size: 0.95rem;
}

.plan-spec-list li {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text-secondary);
}

.plan-spec-list li svg {
  width: 18px;
  height: 18px;
  color: var(--cyan);
  flex-shrink: 0;
}

/* User Reviews Section */
.reviews-grid-chamber {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.review-chamber-card {
  background: var(--bg-chamber);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 30px;
  display: flex;
  flex-direction: column;
  transition: all var(--transition-laser);
}

.review-chamber-card:hover {
  border-color: var(--border-laser);
  box-shadow: 0 0 25px rgba(0, 0, 0, 0.4);
  transform: translateY(-4px);
}

.rating-spectrogram {
  display: flex;
  gap: 4px;
  color: var(--cyan);
  margin-bottom: 16px;
}

.rating-spectrogram svg {
  width: 16px;
  height: 16px;
  fill: currentColor;
}

.review-quote-body {
  font-size: 0.96rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 22px;
  flex-grow: 1;
  font-style: italic;
}

.review-author-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  border-top: 1px solid var(--border-subtle);
  padding-top: 16px;
}

.author-optic-sig {
  width: 40px;
  height: 40px;
  border: 1px solid var(--cyan-border);
  background: rgba(0, 240, 255, 0.08);
  border-radius: var(--radius-sm);
  color: var(--cyan);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-weight: 800;
  font-size: 1rem;
}

.author-creds h3,
.author-creds h4 {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-primary);
}

.author-creds span {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* FAQ Interactive Details */
.faq-chamber-list {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-optic-row {
  background: var(--bg-chamber);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color var(--transition-laser);
}

.faq-optic-row:hover {
  border-color: var(--cyan-border);
}

.faq-optic-row[open] {
  border-color: var(--cyan);
  box-shadow: 0 0 20px var(--cyan-glow);
}

.faq-trigger {
  padding: 22px 26px;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-primary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  list-style: none;
  user-select: none;
}

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

.faq-arrow-indicator {
  width: 20px;
  height: 20px;
  color: var(--cyan);
  transition: transform var(--transition-laser);
  flex-shrink: 0;
  margin-left: 16px;
}

.faq-optic-row[open] .faq-arrow-indicator {
  transform: rotate(180deg);
}

.faq-content-chamber {
  padding: 0 26px 24px 26px;
  font-size: 0.98rem;
  color: var(--text-secondary);
  line-height: 1.75;
  border-top: 1px solid var(--border-subtle);
  padding-top: 18px;
}

/* Final Stimulated Emission Banner */
.emission-chamber-banner {
  background: radial-gradient(circle at 50% 50%, rgba(124, 58, 237, 0.15) 0%, rgba(0, 240, 255, 0.08) 50%, var(--bg-chamber) 100%);
  border: 1px solid var(--border-laser);
  border-radius: var(--radius-md);
  padding: 60px 40px;
  text-align: center;
  box-shadow: 0 0 50px rgba(0, 0, 0, 0.5), inset 0 0 30px var(--cyan-glow);
  position: relative;
}

.emission-chamber-banner h2 {
  font-size: 2.4rem;
  font-weight: 900;
  margin-bottom: 16px;
  color: var(--text-primary);
}

.emission-chamber-banner p {
  font-size: 1.15rem;
  color: var(--text-secondary);
  max-width: 640px;
  margin: 0 auto 36px auto;
}

/* Footer Section - Strictly 4 Titles */
.site-footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-subtle);
  padding: 60px 0 40px 0;
  margin-top: auto;
  position: relative;
  z-index: 10;
}

.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: var(--laser-beam);
  opacity: 0.4;
}

.footer-nav-chamber {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 48px;
  margin-bottom: 32px;
  flex-wrap: wrap;
}

.footer-optic-link {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-secondary);
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  transition: all var(--transition-laser);
}

.footer-optic-link:hover {
  color: var(--cyan);
  border-color: var(--border-laser);
  background: rgba(0, 240, 255, 0.05);
  box-shadow: 0 0 12px var(--cyan-glow);
}

.footer-chamber-copy {
  text-align: center;
  font-size: 0.88rem;
  color: var(--text-muted);
  border-top: 1px solid var(--border-subtle);
  padding-top: 28px;
  font-family: var(--font-mono);
}

/* Subpages Content Styles */
.subpage-lead-header {
  padding: 70px 0 50px 0;
  text-align: center;
  border-bottom: 1px solid var(--border-subtle);
  background: var(--bg-secondary);
}

.subpage-lead-title {
  font-size: 2.8rem;
  font-weight: 900;
  margin-bottom: 14px;
  letter-spacing: -0.03em;
}

.subpage-lead-subtitle {
  font-size: 1.15rem;
  color: var(--text-secondary);
}

.subpage-chamber-layout {
  padding: 60px 0;
  max-width: 900px;
  margin: 0 auto;
}

.chamber-doc-block {
  background: var(--bg-chamber);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 40px;
  margin-bottom: 32px;
  box-shadow: 0 0 25px rgba(0, 0, 0, 0.2);
}

.chamber-doc-block h2 {
  font-size: 1.6rem;
  font-weight: 800;
  margin-bottom: 18px;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 12px;
}

.chamber-doc-block h2 svg {
  color: var(--cyan);
  width: 24px;
  height: 24px;
}

.chamber-doc-block p {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 16px;
}

.chamber-doc-block ul {
  padding-left: 22px;
  margin-bottom: 18px;
  color: var(--text-secondary);
  line-height: 1.8;
}

.chamber-doc-block li {
  margin-bottom: 8px;
}

.alert-laser-box {
  padding: 16px 22px;
  border-radius: var(--radius-sm);
  margin: 22px 0;
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 0.95rem;
  line-height: 1.7;
}

.alert-laser-box.info {
  background: rgba(0, 240, 255, 0.06);
  border: 1px solid var(--border-laser);
  color: var(--cyan);
}

.alert-laser-box.warning {
  background: rgba(124, 58, 237, 0.08);
  border: 1px solid rgba(124, 58, 237, 0.4);
  color: var(--text-primary);
}

/* ==========================================================================
   Long-form SEO Educational Articles & Hub Layouts
   ========================================================================== */
.article-wrap {
  max-width: 920px;
  margin: 0 auto;
  padding: 50px 0 80px 0;
}

.breadcrumb-nav {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.breadcrumb-nav a {
  color: var(--text-secondary);
  transition: color var(--transition-laser);
}

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

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

.article-header-box {
  background: var(--bg-chamber);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 40px;
  margin-bottom: 36px;
  box-shadow: 0 0 30px rgba(0, 0, 0, 0.2);
  position: relative;
}

.article-header-box::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--laser-beam);
}

.article-title-h1 {
  font-size: 2.35rem;
  font-weight: 900;
  line-height: 1.3;
  margin: 16px 0 20px 0;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

.article-meta-bar {
  display: flex;
  align-items: center;
  gap: 20px;
  font-family: var(--font-mono);
  font-size: 0.84rem;
  color: var(--text-muted);
  flex-wrap: wrap;
}

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

/* Article Table of Contents (TOC) */
.article-toc {
  background: var(--bg-secondary);
  border: 1px solid var(--border-laser);
  border-radius: var(--radius-md);
  padding: 28px 32px;
  margin: 36px 0 44px 0;
  position: relative;
}

.article-toc-title {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--cyan);
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
  font-family: var(--font-mono);
  text-transform: uppercase;
}

.article-toc-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.article-toc-list li {
  padding-left: 18px;
  position: relative;
  font-size: 0.95rem;
}

.article-toc-list li::before {
  content: "›";
  position: absolute;
  left: 0;
  color: var(--cyan);
  font-weight: 800;
}

.article-toc-list a {
  color: var(--text-secondary);
  font-weight: 500;
}

.article-toc-list a:hover {
  color: var(--cyan);
  text-decoration: underline;
}

/* Article Body Typography */
.article-body-content {
  color: var(--text-secondary);
  font-size: 1.05rem;
  line-height: 1.85;
}

.article-body-content h2 {
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--text-primary);
  margin: 48px 0 20px 0;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border-subtle);
  position: relative;
}

.article-body-content h2::before {
  content: "#";
  color: var(--cyan);
  margin-right: 8px;
  font-family: var(--font-mono);
}

.article-body-content h3 {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: 32px 0 14px 0;
}

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

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

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

.article-body-content li {
  margin-bottom: 10px;
}

.article-body-content a.internal-brand-link {
  color: var(--cyan);
  font-weight: 700;
  text-decoration: underline;
  text-underline-offset: 4px;
}

.article-body-content a.internal-brand-link:hover {
  color: var(--violet);
}

/* Comparison Tables in Articles */
.seo-table-container {
  overflow-x: auto;
  margin: 28px 0 36px 0;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  background: var(--bg-chamber);
}

.seo-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.94rem;
}

.seo-table th {
  background: var(--bg-secondary);
  color: var(--cyan);
  padding: 14px 18px;
  font-family: var(--font-mono);
  font-weight: 700;
  border-bottom: 1px solid var(--border-subtle);
  white-space: nowrap;
}

.seo-table td {
  padding: 14px 18px;
  border-bottom: 1px solid var(--border-subtle);
  color: var(--text-secondary);
}

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

.seo-table tr:hover td {
  background: rgba(0, 240, 255, 0.02);
}

/* Callout Box inside Article */
.article-callout {
  background: rgba(124, 58, 237, 0.06);
  border-left: 4px solid var(--violet);
  padding: 20px 24px;
  margin: 28px 0;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-size: 0.98rem;
  line-height: 1.75;
}

.article-callout.cyan-callout {
  background: rgba(0, 240, 255, 0.05);
  border-left-color: var(--cyan);
}

/* Related Reading Grid */
.related-posts-section {
  margin-top: 64px;
  padding-top: 40px;
  border-top: 1px solid var(--border-subtle);
}

.related-posts-title {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  gap: 10px;
}

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

.related-card {
  background: var(--bg-chamber);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 22px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: all var(--transition-laser);
}

.related-card:hover {
  border-color: var(--cyan-border);
  box-shadow: 0 0 20px var(--cyan-glow);
  transform: translateY(-3px);
}

.related-tag {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--cyan);
  margin-bottom: 10px;
}

.related-heading {
  font-size: 1.05rem;
  font-weight: 700;
  line-height: 1.45;
  color: var(--text-primary);
  margin-bottom: 14px;
}

.related-read-more {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--cyan);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

/* News Hub Grid in optics-pulse-8f1.html */
.news-cards-matrix {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  margin: 40px 0;
}

.news-article-card {
  background: var(--bg-chamber);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 30px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: all var(--transition-laser);
  position: relative;
}

.news-article-card:hover {
  border-color: var(--cyan-border);
  box-shadow: 0 0 30px var(--cyan-glow);
  transform: translateY(-5px);
}

.news-card-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--cyan);
  background: rgba(0, 240, 255, 0.08);
  border: 1px solid var(--border-laser);
  padding: 3px 10px;
  border-radius: var(--radius-sm);
  margin-bottom: 16px;
  width: max-content;
}

.news-card-badge.brand-badge {
  color: var(--violet);
  background: rgba(124, 58, 237, 0.1);
  border-color: rgba(124, 58, 237, 0.4);
}

.news-card-title {
  font-size: 1.28rem;
  font-weight: 800;
  line-height: 1.4;
  margin-bottom: 14px;
  color: var(--text-primary);
}

.news-card-excerpt {
  font-size: 0.94rem;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 24px;
  flex-grow: 1;
}

.news-card-footer {
  border-top: 1px solid var(--border-subtle);
  padding-top: 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-muted);
}

.news-card-footer .read-btn {
  color: var(--cyan);
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

/* Responsive Breakpoints */
@media (max-width: 1024px) {
  .news-cards-matrix,
  .related-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .hero-main-title {
    font-size: 2.8rem;
  }
  .chamber-grid-3,
  .pricing-matrix,
  .reviews-grid-chamber,
  .route-telemetry-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .amplification-split {
    grid-template-columns: 1fr;
  }
  .pricing-module.recommended {
    transform: none;
  }
}

@media (max-width: 768px) {
  .optic-section {
    padding: 60px 0;
  }
  .hero-chamber {
    padding: 70px 0 50px 0;
  }
  .hero-main-title {
    font-size: 2.2rem;
  }
  .hero-intro-text {
    font-size: 1.05rem;
  }
  .nav-catalogue {
    display: none;
  }
  .chamber-grid-3,
  .pricing-matrix,
  .reviews-grid-chamber,
  .route-telemetry-grid {
    grid-template-columns: 1fr;
  }
  .btn-laser {
    width: 100%;
    min-height: 48px; /* Touch-friendly tap target */
  }
  .hero-cta-chamber {
    flex-direction: column;
    width: 100%;
  }
  .footer-nav-chamber {
    flex-direction: column;
    gap: 16px;
  }
  .optical-telemetry-footer {
    grid-template-columns: 1fr;
  }
  .chamber-doc-block {
    padding: 24px 20px;
  }
}