/* ==========================================================================
   BoostNet - Laser-Cavity Optical Amplifier Design System
   Palette: OLED Black (#000000) | Cryogenic Cyan (#00f0ff) | Coherent Violet (#7c3aed) | Photon White (#ffffff)
   Zero Generic AI Icons | Monolithic Optic-Chamber Architecture
   ========================================================================== */

/* --------------------------------------------------------------------------
   Optical Color Variables & Themes
   -------------------------------------------------------------------------- */
:root {
  /* Day Mode (Default - High-Precision Optical Cleanroom) */
  --bg-primary: #f8fafc;
  --bg-secondary: #f1f5f9;
  --bg-chamber: rgba(255, 255, 255, 0.85);
  --bg-chamber-active: #ffffff;
  --bg-glass: rgba(248, 250, 252, 0.88);
  
  --text-primary: #030712;
  --text-secondary: #1f2937;
  --text-muted: #4b5563;
  --text-mono: #0284c7;

  --laser-cyan: #00b4d8;
  --laser-cyan-glow: rgba(0, 180, 216, 0.35);
  --laser-violet: #6d28d9;
  --laser-violet-glow: rgba(109, 40, 217, 0.3);
  --photon-white: #ffffff;
  
  --border-optic: rgba(0, 180, 216, 0.25);
  --border-light: rgba(15, 23, 42, 0.08);
  --border-active: #00b4d8;

  --gain-tube-gradient: linear-gradient(90deg, transparent 0%, #00b4d8 25%, #6d28d9 75%, transparent 100%);
  --laser-gradient: linear-gradient(135deg, #0284c7 0%, #6d28d9 100%);
  --laser-gradient-hover: linear-gradient(135deg, #0369a1 0%, #5b21b6 100%);

  --shadow-chamber: 0 4px 20px -2px rgba(0, 180, 216, 0.08), 0 2px 8px -1px rgba(0, 0, 0, 0.04);
  --shadow-laser: 0 0 25px rgba(0, 180, 216, 0.25);

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

  --transition-fast: 0.18s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-normal: 0.32s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-slow: 0.6s cubic-bezier(0.16, 1, 0.3, 1);

  --max-width: 1240px;
}

[data-theme="dark"] {
  /* Dark Mode (Deep Photon-Darkroom Palette) */
  --bg-primary: #000000;
  --bg-secondary: #05070c;
  --bg-chamber: rgba(8, 12, 20, 0.72);
  --bg-chamber-active: rgba(12, 18, 30, 0.95);
  --bg-glass: rgba(0, 0, 0, 0.85);

  --text-primary: #ffffff;
  --text-secondary: #e2e8f0;
  --text-muted: #94a3b8;
  --text-mono: #00f0ff;

  --laser-cyan: #00f0ff;
  --laser-cyan-glow: rgba(0, 240, 255, 0.5);
  --laser-violet: #7c3aed;
  --laser-violet-glow: rgba(124, 58, 237, 0.45);
  --photon-white: #ffffff;

  --border-optic: rgba(0, 240, 255, 0.18);
  --border-light: rgba(255, 255, 255, 0.06);
  --border-active: #00f0ff;

  --gain-tube-gradient: linear-gradient(90deg, transparent 0%, #00f0ff 30%, #7c3aed 70%, transparent 100%);
  --laser-gradient: linear-gradient(135deg, #00f0ff 0%, #7c3aed 100%);
  --laser-gradient-hover: linear-gradient(135deg, #38bdf8 0%, #8b5cf6 100%);

  --shadow-chamber: 0 0 25px rgba(0, 240, 255, 0.05), inset 0 0 15px rgba(0, 240, 255, 0.02);
  --shadow-laser: 0 0 35px rgba(0, 240, 255, 0.4), 0 0 15px rgba(124, 58, 237, 0.3);
}

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

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

body {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background-color var(--transition-normal), color var(--transition-normal);
  overflow-x: hidden;
  position: relative;
}

/* Photon Darkroom Ambient Grid */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  background-image: 
    radial-gradient(circle at 50% 0%, rgba(0, 240, 255, 0.04) 0%, transparent 60%),
    linear-gradient(to right, var(--border-light) 1px, transparent 1px),
    linear-gradient(to bottom, var(--border-light) 1px, transparent 1px);
  background-size: 100% 100%, 48px 48px, 48px 48px;
  z-index: 0;
}

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

.mono {
  font-family: var(--font-mono);
  letter-spacing: -0.02em;
}

.container {
  width: 100%;
  max-width: var(--max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
  position: relative;
  z-index: 1;
}

.section {
  padding: 104px 0;
  position: relative;
  scroll-margin-top: 84px;
}

.section-flash {
  animation: laserSectionPulse 1.2s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes laserSectionPulse {
  0% {
    box-shadow: 0 0 0 0 var(--laser-cyan-glow);
  }
  30% {
    box-shadow: 0 0 60px 4px var(--laser-cyan-glow);
  }
  100% {
    box-shadow: none;
  }
}

.section-header {
  text-align: center;
  max-width: 820px;
  margin: 0 auto 60px auto;
}

.section-telemetry {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 4px 14px;
  background: rgba(0, 240, 255, 0.08);
  border: 1px solid var(--border-optic);
  color: var(--text-mono);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 18px;
  border-radius: 2px;
}

.section-telemetry-dot {
  width: 6px;
  height: 6px;
  background: var(--laser-cyan);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--laser-cyan);
  animation: pulseDot 1.8s infinite ease-in-out;
}

.section-title {
  font-size: 2.5rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.22;
  margin-bottom: 18px;
  color: var(--text-primary);
}

.section-desc {
  font-size: 1.08rem;
  color: var(--text-muted);
  line-height: 1.7;
}

/* --------------------------------------------------------------------------
   Navigation Bar with Quantum Transition
   -------------------------------------------------------------------------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: var(--bg-glass);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-optic);
  transition: all var(--transition-normal);
}

.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1.35rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

.logo-optical-chamber {
  width: 38px;
  height: 38px;
  border: 1px solid var(--laser-cyan);
  background: rgba(0, 240, 255, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  border-radius: 4px;
  box-shadow: 0 0 14px var(--laser-cyan-glow);
}

.logo-optical-chamber svg {
  color: var(--laser-cyan);
}

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

.logo-tag {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  padding: 2px 6px;
  background: rgba(124, 58, 237, 0.15);
  border: 1px solid rgba(124, 58, 237, 0.4);
  color: var(--laser-violet);
  border-radius: 2px;
  margin-left: 4px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 22px;
  list-style: none;
}

.nav-link {
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--text-secondary);
  position: relative;
  padding: 8px 6px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

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

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

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

.nav-link-badge {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  padding: 1px 5px;
  background: rgba(0, 240, 255, 0.15);
  border: 1px solid var(--laser-cyan);
  color: var(--text-mono);
  border-radius: 2px;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}

/* --------------------------------------------------------------------------
   Precision Day / Night Laser Cavity Switch
   -------------------------------------------------------------------------- */
.theme-toggle-btn {
  width: 40px;
  height: 40px;
  border-radius: 4px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-chamber);
  border: 1px solid var(--border-optic);
  color: var(--text-primary);
  position: relative;
  cursor: pointer;
  overflow: hidden;
  transition: all var(--transition-normal);
  backdrop-filter: blur(8px);
}

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

.theme-icon {
  width: 19px;
  height: 19px;
  transition: transform var(--transition-normal), opacity var(--transition-normal);
  stroke-width: 1.8;
}

.theme-icon-sun {
  position: absolute;
  opacity: 1;
  transform: rotate(0deg) scale(1);
  color: #0284c7;
}

.theme-icon-moon {
  position: absolute;
  opacity: 0;
  transform: rotate(90deg) scale(0.6);
  color: var(--laser-cyan);
}

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

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

.mobile-menu-btn {
  display: none;
  width: 40px;
  height: 40px;
  border-radius: 4px;
  background: var(--bg-chamber);
  border: 1px solid var(--border-optic);
  color: var(--text-primary);
  align-items: center;
  justify-content: center;
}

/* --------------------------------------------------------------------------
   Buttons (Stimulated Emission Style)
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 0.95rem;
  font-weight: 700;
  padding: 10px 22px;
  border-radius: 4px;
  transition: all var(--transition-normal);
  cursor: pointer;
  white-space: nowrap;
  line-height: 1.4;
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: var(--laser-gradient);
  color: #ffffff !important;
  border: 1px solid rgba(255, 255, 255, 0.2);
  box-shadow: var(--shadow-laser);
}

.btn-primary:hover {
  background: var(--laser-gradient-hover);
  transform: translateY(-2px);
  box-shadow: 0 0 35px var(--laser-cyan-glow), 0 0 20px var(--laser-violet-glow);
}

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

.btn-secondary:hover {
  border-color: var(--laser-cyan);
  color: var(--text-mono);
  box-shadow: 0 0 18px var(--laser-cyan-glow);
  transform: translateY(-2px);
}

.btn-lg {
  padding: 14px 34px;
  font-size: 1.05rem;
}

.btn-block {
  width: 100%;
}

/* --------------------------------------------------------------------------
   Hero Section: Monolithic Optic-Chamber & Central Quartz Tube
   -------------------------------------------------------------------------- */
.hero-section {
  padding-top: 150px;
  padding-bottom: 90px;
  position: relative;
  overflow: hidden;
  text-align: center;
}

.hero-reticle {
  position: absolute;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--laser-cyan);
  opacity: 0.6;
  pointer-events: none;
}

.hero-reticle-tl { top: 100px; left: 40px; }
.hero-reticle-tr { top: 100px; right: 40px; }

.hero-badge-wrap {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 6px 18px;
  background: var(--bg-chamber);
  border: 1px solid var(--border-optic);
  border-radius: 4px;
  font-size: 0.85rem;
  font-family: var(--font-mono);
  color: var(--text-secondary);
  margin-bottom: 28px;
  box-shadow: var(--shadow-chamber);
}

.hero-badge-live {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--laser-cyan);
  font-weight: 700;
}

.hero-title {
  font-size: 3.6rem;
  font-weight: 900;
  letter-spacing: -0.04em;
  line-height: 1.15;
  margin-bottom: 22px;
  color: var(--text-primary);
}

.laser-glow-text {
  background: var(--laser-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  text-shadow: 0 0 35px var(--laser-cyan-glow);
}

.hero-subtitle {
  font-size: 1.35rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 16px;
}

.hero-brief-intro {
  font-size: 1.05rem;
  color: var(--text-muted);
  line-height: 1.75;
  max-width: 820px;
  margin: 0 auto 36px auto;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  margin-bottom: 56px;
  flex-wrap: wrap;
}

/* Central Horizontal Quartz Laser-Gain Tube */
.quartz-tube-wrapper {
  margin: 0 auto 50px auto;
  max-width: 960px;
  background: var(--bg-chamber);
  border: 1px solid var(--border-optic);
  border-radius: 4px;
  padding: 24px 28px;
  position: relative;
  box-shadow: var(--shadow-chamber);
}

.quartz-tube-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--text-muted);
  margin-bottom: 14px;
  border-bottom: 1px dashed var(--border-optic);
  padding-bottom: 8px;
}

.quartz-tube-chamber {
  height: 18px;
  background: rgba(0, 0, 0, 0.4);
  border: 1px solid var(--laser-cyan);
  border-radius: 3px;
  position: relative;
  overflow: hidden;
  box-shadow: inset 0 0 12px rgba(0, 240, 255, 0.25);
}

.quartz-laser-beam {
  position: absolute;
  top: 0;
  left: 0;
  bottom: 0;
  width: 100%;
  background: var(--gain-tube-gradient);
  animation: laserSweep 3s infinite linear;
}

.quartz-photon-pulse {
  position: absolute;
  top: 0;
  left: -20%;
  width: 25%;
  height: 100%;
  background: linear-gradient(90deg, transparent, #ffffff 50%, var(--laser-cyan) 100%);
  filter: blur(2px);
  animation: photonPulseStream 2s infinite ease-in-out;
}

@keyframes laserSweep {
  0% { transform: translateX(-50%); }
  100% { transform: translateX(50%); }
}

@keyframes photonPulseStream {
  0% { left: -25%; opacity: 0.2; }
  50% { opacity: 1; filter: blur(1px); }
  100% { left: 110%; opacity: 0.1; }
}

.quartz-telemetry-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-top: 18px;
  text-align: left;
}

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

.telemetry-label {
  font-size: 0.72rem;
  color: var(--text-muted);
  text-transform: uppercase;
}

.telemetry-val {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-mono);
  margin-top: 2px;
}

/* --------------------------------------------------------------------------
   Oscilloscope Route Analyzer (Stimulated Emission Interaction)
   -------------------------------------------------------------------------- */
.oscilloscope-chamber {
  background: var(--bg-chamber);
  border: 1px solid var(--border-optic);
  border-radius: 4px;
  padding: 30px;
  margin-bottom: 56px;
  box-shadow: var(--shadow-chamber);
  position: relative;
}

.oscilloscope-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
  flex-wrap: wrap;
  gap: 12px;
}

.oscilloscope-title {
  font-size: 1.15rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 10px;
}

.oscilloscope-title svg {
  color: var(--laser-cyan);
}

.oscilloscope-canvas-wrap {
  position: relative;
  width: 100%;
  height: 140px;
  background: rgba(0, 0, 0, 0.6);
  border: 1px solid rgba(0, 240, 255, 0.3);
  border-radius: 4px;
  overflow: hidden;
  margin-bottom: 22px;
}

.oscilloscope-grid-bg {
  position: absolute;
  inset: 0;
  background-image: 
    linear-gradient(rgba(0, 240, 255, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 240, 255, 0.08) 1px, transparent 1px);
  background-size: 20px 20px;
  pointer-events: none;
}

#oscilloscopeCanvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}

.oscilloscope-status-overlay {
  position: absolute;
  bottom: 8px;
  right: 12px;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--laser-cyan);
  background: rgba(0, 0, 0, 0.65);
  padding: 2px 8px;
  border: 1px solid var(--border-optic);
}

.route-selector-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 12px;
}

.route-pill {
  padding: 12px 14px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-light);
  border-radius: 4px;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-align: left;
}

.route-pill:hover, .route-pill.active {
  border-color: var(--laser-cyan);
  background: rgba(0, 240, 255, 0.08);
  box-shadow: 0 0 16px var(--laser-cyan-glow);
}

.route-name {
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.route-stats {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--text-muted);
  margin-top: 4px;
  display: flex;
  justify-content: space-between;
}

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

.chamber-card {
  background: var(--bg-chamber);
  border: 1px solid var(--border-optic);
  border-radius: 4px;
  padding: 36px 30px;
  position: relative;
  transition: all var(--transition-normal);
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-chamber);
}

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

.chamber-card-index {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-mono);
  margin-bottom: 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.chamber-icon-box {
  width: 52px;
  height: 52px;
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 22px;
  border: 1px solid var(--border-optic);
  background: rgba(0, 240, 255, 0.05);
  color: var(--laser-cyan);
}

.chamber-icon-box svg {
  width: 26px;
  height: 26px;
}

.chamber-card-title {
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 14px;
  color: var(--text-primary);
}

.chamber-card-desc {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 22px;
}

.chamber-specs-list {
  list-style: none;
  margin-top: auto;
  display: flex;
  flex-direction: column;
  gap: 10px;
  border-top: 1px dashed var(--border-optic);
  padding-top: 20px;
}

.chamber-specs-list li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.88rem;
  color: var(--text-secondary);
  font-family: var(--font-mono);
}

.chamber-specs-list li svg {
  width: 15px;
  height: 15px;
  color: var(--laser-cyan);
  flex-shrink: 0;
}

/* --------------------------------------------------------------------------
   Streaming & AI Support Cards
   -------------------------------------------------------------------------- */
.unlock-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}

.unlock-chamber {
  background: var(--bg-chamber);
  border: 1px solid var(--border-optic);
  border-radius: 4px;
  padding: 38px;
  box-shadow: var(--shadow-chamber);
  display: flex;
  flex-direction: column;
  position: relative;
  transition: all var(--transition-normal);
}

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

.unlock-chamber-header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 20px;
}

.unlock-chamber-icon {
  width: 50px;
  height: 50px;
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border-optic);
}

.unlock-icon-stream {
  background: rgba(239, 68, 68, 0.1);
  color: #ef4444;
  border-color: rgba(239, 68, 68, 0.3);
}

.unlock-icon-ai {
  background: rgba(0, 240, 255, 0.1);
  color: var(--laser-cyan);
  border-color: var(--border-optic);
}

.unlock-chamber-title {
  font-size: 1.45rem;
  font-weight: 800;
  color: var(--text-primary);
}

.unlock-chamber-sub {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--text-muted);
}

.unlock-desc {
  font-size: 0.96rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 26px;
}

.tech-tags-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 28px;
}

.laser-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 12px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-light);
  border-radius: 3px;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-primary);
  transition: all var(--transition-fast);
}

.laser-tag:hover {
  border-color: var(--laser-cyan);
  color: var(--text-mono);
  transform: translateY(-2px);
}

.laser-tag-badge {
  font-size: 0.7rem;
  padding: 1px 5px;
  border-radius: 2px;
  font-weight: 800;
}

.specs-duo-row {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  margin-top: auto;
  padding-top: 22px;
  border-top: 1px solid var(--border-light);
}

.specs-duo-box {
  background: var(--bg-secondary);
  padding: 12px 16px;
  border-radius: 3px;
  border: 1px solid var(--border-optic);
  font-family: var(--font-mono);
}

.specs-duo-label {
  font-size: 0.72rem;
  color: var(--text-muted);
  text-transform: uppercase;
}

.specs-duo-val {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-mono);
  margin-top: 2px;
}

/* --------------------------------------------------------------------------
   Pricing Comparison Table (Real Proxy Market Rates)
   -------------------------------------------------------------------------- */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
  align-items: stretch;
}

.pricing-chamber {
  background: var(--bg-chamber);
  border: 1px solid var(--border-optic);
  border-radius: 4px;
  padding: 32px 22px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: all var(--transition-normal);
  box-shadow: var(--shadow-chamber);
}

.pricing-chamber:hover {
  transform: translateY(-6px);
  border-color: var(--laser-cyan);
  box-shadow: 0 0 35px var(--laser-cyan-glow);
}

.pricing-chamber.featured {
  border: 2px solid var(--laser-cyan);
  box-shadow: 0 0 40px var(--laser-cyan-glow);
  transform: scale(1.03);
  z-index: 2;
}

.pricing-chamber.featured:hover {
  transform: scale(1.03) translateY(-6px);
}

.pricing-featured-badge {
  position: absolute;
  top: -13px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--laser-gradient);
  color: #ffffff;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 800;
  padding: 3px 14px;
  border-radius: 2px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  box-shadow: 0 0 16px var(--laser-cyan-glow);
}

.plan-header-tag {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--text-mono);
  margin-bottom: 8px;
}

.plan-title {
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.plan-desc {
  font-size: 0.85rem;
  color: var(--text-muted);
  min-height: 42px;
  line-height: 1.5;
  margin-bottom: 20px;
}

.plan-rate-box {
  margin-bottom: 22px;
  padding-bottom: 22px;
  border-bottom: 1px solid var(--border-optic);
}

.plan-currency {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text-primary);
}

.plan-amount {
  font-size: 2.75rem;
  font-weight: 900;
  color: var(--text-primary);
  line-height: 1;
  font-family: var(--font-mono);
}

.plan-cycle {
  font-size: 0.86rem;
  color: var(--text-muted);
}

.plan-market-reference {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--text-muted);
  text-decoration: line-through;
  margin-top: 6px;
}

.plan-spec-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 30px;
  flex-grow: 1;
}

.plan-spec-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.88rem;
  color: var(--text-secondary);
  font-family: var(--font-mono);
}

.plan-spec-item svg {
  width: 15px;
  height: 15px;
  color: var(--laser-cyan);
  flex-shrink: 0;
}

/* --------------------------------------------------------------------------
   User Reviews & Telemetry Feedback
   -------------------------------------------------------------------------- */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.review-chamber {
  background: var(--bg-chamber);
  border: 1px solid var(--border-optic);
  border-radius: 4px;
  padding: 32px 28px;
  box-shadow: var(--shadow-chamber);
  display: flex;
  flex-direction: column;
  transition: all var(--transition-normal);
}

.review-chamber:hover {
  border-color: var(--laser-cyan);
  box-shadow: 0 0 25px var(--laser-cyan-glow);
  transform: translateY(-4px);
}

.review-telemetry-tag {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-mono);
  display: flex;
  justify-content: space-between;
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 1px dashed var(--border-light);
}

.review-content {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 24px;
  flex-grow: 1;
}

.review-user-box {
  display: flex;
  align-items: center;
  gap: 14px;
  padding-top: 16px;
  border-top: 1px solid var(--border-light);
}

.user-opt-avatar {
  width: 42px;
  height: 42px;
  border-radius: 4px;
  border: 1px solid var(--laser-cyan);
  background: rgba(0, 240, 255, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-mono);
  font-family: var(--font-mono);
  font-weight: 800;
  font-size: 1rem;
}

.user-name {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-primary);
}

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

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

.faq-item {
  background: var(--bg-chamber);
  border: 1px solid var(--border-optic);
  border-radius: 4px;
  overflow: hidden;
  transition: all var(--transition-fast);
}

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

.faq-item.active {
  border-color: var(--laser-cyan);
  box-shadow: 0 0 22px var(--laser-cyan-glow);
}

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 22px 26px;
  text-align: left;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
  cursor: pointer;
  background: transparent;
  gap: 16px;
}

.faq-toggle-icon {
  width: 20px;
  height: 20px;
  color: var(--text-mono);
  transition: transform var(--transition-normal);
  flex-shrink: 0;
}

.faq-item.active .faq-toggle-icon {
  transform: rotate(180deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-normal), padding var(--transition-normal);
  padding: 0 26px;
}

.faq-item.active .faq-answer {
  max-height: 450px;
  padding: 0 26px 24px 26px;
}

.faq-answer p {
  font-size: 0.96rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* --------------------------------------------------------------------------
   Pre-Footer Quantum Banner
   -------------------------------------------------------------------------- */
.quantum-banner {
  background: var(--bg-chamber);
  border: 1px solid var(--laser-cyan);
  border-radius: 4px;
  padding: 56px 40px;
  text-align: center;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-laser);
  margin-top: 50px;
}

.quantum-banner-title {
  font-size: 2.3rem;
  font-weight: 900;
  letter-spacing: -0.03em;
  margin-bottom: 16px;
  color: var(--text-primary);
}

.quantum-banner-desc {
  font-size: 1.1rem;
  color: var(--text-muted);
  max-width: 660px;
  margin: 0 auto 32px auto;
}

/* --------------------------------------------------------------------------
   Site Footer (Strict: ONLY 4 titles, opens in new tab)
   1. 网站地图
   2. 关于我们
   3. 服务条款
   4. 隐私政策
   -------------------------------------------------------------------------- */
.site-footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-optic);
  padding: 56px 0 38px 0;
  transition: all var(--transition-normal);
}

.footer-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 24px;
}

.footer-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 36px;
  list-style: none;
  flex-wrap: wrap;
}

.footer-nav-link {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-secondary);
  padding: 6px 14px;
  border-radius: 3px;
  border: 1px solid transparent;
  transition: all var(--transition-fast);
}

.footer-nav-link:hover {
  color: var(--text-mono);
  border-color: var(--laser-cyan);
  background: rgba(0, 240, 255, 0.08);
}

.footer-divider {
  width: 100%;
  max-width: 480px;
  height: 1px;
  background: var(--border-optic);
}

.footer-telemetry-tag {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-muted);
}

/* --------------------------------------------------------------------------
   Subpage Layouts (About, Terms, Privacy, Sitemap, Tech-Dispatch)
   -------------------------------------------------------------------------- */
.subpage-hero {
  padding-top: 140px;
  padding-bottom: 54px;
  text-align: center;
  position: relative;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-optic);
}

.subpage-title {
  font-size: 2.6rem;
  font-weight: 900;
  color: var(--text-primary);
  margin-bottom: 14px;
}

.subpage-desc {
  font-size: 1.05rem;
  color: var(--text-muted);
  max-width: 720px;
  margin: 0 auto;
}

.subpage-content {
  max-width: 920px;
  margin: 50px auto 90px auto;
  padding: 0 24px;
}

.policy-block {
  background: var(--bg-chamber);
  border: 1px solid var(--border-optic);
  border-radius: 4px;
  padding: 36px;
  margin-bottom: 30px;
  box-shadow: var(--shadow-chamber);
}

.policy-block-title {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.policy-block-title svg {
  color: var(--laser-cyan);
  width: 22px;
  height: 22px;
}

.policy-text {
  font-size: 0.96rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 16px;
}

.policy-list {
  padding-left: 20px;
  margin-bottom: 16px;
  color: var(--text-secondary);
  font-size: 0.96rem;
  line-height: 1.8;
}

.policy-list li {
  margin-bottom: 8px;
}

.policy-alert {
  padding: 16px 20px;
  border-radius: 4px;
  margin: 20px 0;
  font-size: 0.92rem;
  line-height: 1.65;
  display: flex;
  gap: 12px;
  align-items: flex-start;
}

.policy-alert-info {
  background: rgba(0, 240, 255, 0.08);
  border: 1px solid var(--laser-cyan);
  color: var(--text-primary);
}

.policy-alert-danger {
  background: rgba(239, 68, 68, 0.08);
  border: 1px solid #ef4444;
  color: var(--text-primary);
}

.policy-alert svg {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  margin-top: 2px;
}

.table-responsive {
  width: 100%;
  overflow-x: auto;
  margin: 20px 0;
}

.styled-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
  text-align: left;
  font-family: var(--font-mono);
}

.styled-table th, .styled-table td {
  padding: 14px 18px;
  border-bottom: 1px solid var(--border-optic);
}

.styled-table th {
  background: var(--bg-secondary);
  color: var(--text-primary);
  font-weight: 700;
}

.styled-table td {
  color: var(--text-secondary);
}

.sitemap-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}

.sitemap-card {
  background: var(--bg-chamber);
  border: 1px solid var(--border-optic);
  border-radius: 4px;
  padding: 28px;
  box-shadow: var(--shadow-chamber);
}

.sitemap-card-title {
  font-size: 1.2rem;
  font-weight: 800;
  color: var(--text-mono);
  margin-bottom: 18px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.sitemap-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.sitemap-links a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.sitemap-links a:hover {
  color: var(--text-mono);
  transform: translateX(4px);
}

/* --------------------------------------------------------------------------
   Responsive Layout (@media)
   -------------------------------------------------------------------------- */
@media (max-width: 1024px) {
  .pricing-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .pricing-chamber.featured {
    transform: none;
  }

  .pricing-chamber.featured:hover {
    transform: translateY(-6px);
  }

  .advantages-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .route-selector-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 768px) {
  .section {
    padding: 68px 0;
  }

  .hero-section {
    padding-top: 110px;
    padding-bottom: 60px;
  }

  .hero-title {
    font-size: 2.3rem;
  }

  .hero-subtitle {
    font-size: 1.1rem;
  }

  .quartz-telemetry-row {
    grid-template-columns: repeat(2, 1fr);
  }

  .route-selector-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .advantages-grid,
  .unlock-grid,
  .pricing-grid,
  .reviews-grid,
  .sitemap-grid {
    grid-template-columns: 1fr;
  }

  .pricing-grid {
    max-width: 440px;
    margin: 0 auto;
  }

  .mobile-menu-btn {
    display: inline-flex;
  }

  .nav-links {
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    background: var(--bg-primary);
    flex-direction: column;
    padding: 24px;
    gap: 14px;
    border-bottom: 1px solid var(--border-optic);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
    transform: translateY(-120%);
    opacity: 0;
    pointer-events: none;
    transition: all var(--transition-normal);
  }

  .nav-links.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .nav-link {
    font-size: 1.05rem;
    width: 100%;
    padding: 10px 0;
  }

  .hero-cta-group {
    flex-direction: column;
    width: 100%;
  }

  .hero-cta-group .btn {
    width: 100%;
  }

  .footer-nav {
    flex-direction: column;
    gap: 14px;
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: 1.95rem;
  }

  .quartz-telemetry-row {
    grid-template-columns: 1fr;
  }

  .specs-duo-row {
    grid-template-columns: 1fr;
  }

  .route-selector-grid {
    grid-template-columns: 1fr;
  }
}