/* ==========================================================================
   BoostNet - Laser-Cavity Optical Amplifier Architecture UI
   Deep Photon-Darkroom Palette: OLED Black, Cryogenic Cyan & Laser Violet
   Strictly Zero Generic AI Icons | Stark Monolithic Optic Chambers
   ========================================================================== */

:root {
  /* Cryogenic Precision Lab Light Theme (Default) */
  --bg-primary: #ffffff;
  --bg-secondary: #f4f8fd;
  --bg-chamber: rgba(255, 255, 255, 0.95);
  --bg-chamber-solid: #ffffff;
  --bg-chamber-glow: rgba(0, 190, 220, 0.04);
  --bg-glass-nav: rgba(255, 255, 255, 0.88);
  --border-optic: rgba(14, 165, 233, 0.22);
  --border-subtle: #e2e8f0;
  --border-laser: #0284c7;

  --text-photon: #070d18;
  --text-secondary: #334155;
  --text-mono-meta: #0369a1;
  --text-muted: #64748b;

  --laser-cyan: #0284c7;
  --laser-cyan-glow: rgba(2, 132, 199, 0.3);
  --laser-violet: #6d28d9;
  --laser-violet-glow: rgba(109, 40, 217, 0.25);
  --laser-white: #ffffff;
  --laser-amber: #d97706;
  --laser-emerald: #059669;

  --gradient-laser-beam: linear-gradient(90deg, #0284c7 0%, #6d28d9 50%, #00b4d8 100%);
  --gradient-text: linear-gradient(135deg, #0284c7 0%, #6d28d9 60%, #0369a1 100%);
  --laser-glow: 0 0 20px rgba(2, 132, 199, 0.2), 0 0 40px rgba(109, 40, 217, 0.15);
  --tube-conduit: linear-gradient(90deg, transparent 0%, rgba(2, 132, 199, 0.6) 20%, rgba(109, 40, 217, 0.8) 50%, rgba(2, 132, 199, 0.6) 80%, transparent 100%);

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

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

  --transition-fast: 0.15s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-normal: 0.28s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-laser: 0.5s cubic-bezier(0.19, 1, 0.22, 1);
}

/* Deep Photon-Darkroom Mode */
[data-theme="dark"] {
  --bg-primary: #000000;
  --bg-secondary: #030712;
  --bg-chamber: rgba(5, 11, 24, 0.85);
  --bg-chamber-solid: #030712;
  --bg-chamber-glow: rgba(0, 240, 255, 0.05);
  --bg-glass-nav: rgba(0, 0, 0, 0.85);
  --border-optic: rgba(0, 240, 255, 0.2);
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-laser: #00f0ff;

  --text-photon: #ffffff;
  --text-secondary: #94a3b8;
  --text-mono-meta: #00f0ff;
  --text-muted: #64748b;

  --laser-cyan: #00f0ff;
  --laser-cyan-glow: rgba(0, 240, 255, 0.5);
  --laser-violet: #7c3aed;
  --laser-violet-glow: rgba(124, 58, 237, 0.45);
  --laser-white: #ffffff;
  --laser-amber: #fbbf24;
  --laser-emerald: #10b981;

  --gradient-laser-beam: linear-gradient(90deg, #00f0ff 0%, #7c3aed 50%, #00f0ff 100%);
  --gradient-text: linear-gradient(135deg, #00f0ff 0%, #a78bfa 50%, #ffffff 100%);
  --laser-glow: 0 0 25px rgba(0, 240, 255, 0.35), 0 0 50px rgba(124, 58, 237, 0.25);
  --tube-conduit: linear-gradient(90deg, transparent 0%, rgba(0, 240, 255, 0.8) 20%, rgba(124, 58, 237, 0.9) 50%, rgba(0, 240, 255, 0.8) 80%, transparent 100%);
}

/* ==========================================================================
   CSS Reset & Base Rules
   ========================================================================== */
*, *::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-photon);
  line-height: 1.6;
  overflow-x: hidden;
  transition: background-color var(--transition-normal), color var(--transition-normal);
  position: relative;
}

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

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

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

/* Monospace technical labels */
.mono-tag {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.06em;
  color: var(--text-mono-meta);
  text-transform: uppercase;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.mono-tag::before {
  content: 'λ';
  font-weight: 700;
  opacity: 0.8;
}

/* ==========================================================================
   Continuous Quartz Laser-Gain Tube (Central Conduit)
   ========================================================================== */
.laser-gain-tube-conduit {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  width: 2px;
  transform: translateX(-50%);
  background: linear-gradient(180deg, 
    transparent 0%, 
    var(--laser-cyan) 10%, 
    var(--laser-violet) 50%, 
    var(--laser-cyan) 90%, 
    transparent 100%
  );
  opacity: 0.35;
  pointer-events: none;
  z-index: 0;
}

.horizontal-laser-track {
  position: relative;
  width: 100%;
  height: 2px;
  background: var(--tube-conduit);
  margin: 40px 0;
  overflow: visible;
}

.horizontal-laser-track::after {
  content: '';
  position: absolute;
  top: -3px;
  left: -20%;
  width: 140px;
  height: 8px;
  background: radial-gradient(circle, var(--laser-cyan) 0%, transparent 70%);
  border-radius: 50%;
  filter: blur(2px);
  animation: photonPulseTrack 6s infinite linear;
}

@keyframes photonPulseTrack {
  0% { left: -10%; opacity: 0; }
  10% { opacity: 1; }
  90% { opacity: 1; }
  100% { left: 110%; opacity: 0; }
}

/* ==========================================================================
   Container & Layout (Stark Monolithic Chambers)
   ========================================================================== */
.container {
  width: 100%;
  max-width: 1220px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
  position: relative;
  z-index: 1;
}

.section {
  padding-top: 100px;
  padding-bottom: 100px;
  position: relative;
}

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

.section-title {
  font-size: clamp(2.1rem, 3.8vw, 3rem);
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 18px;
  letter-spacing: -0.02em;
}

.section-subtitle {
  font-size: 1.1rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

.laser-gradient-text {
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
  text-shadow: 0 0 30px var(--laser-cyan-glow);
}

/* ==========================================================================
   Laser Buttons & Action Controls (Strict CTA Requirements)
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 13px 28px;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  transition: all var(--transition-normal);
  text-decoration: none;
  white-space: nowrap;
  user-select: none;
  font-family: var(--font-sans);
  position: relative;
  overflow: hidden;
}

.btn-laser-primary {
  background: var(--gradient-laser-beam);
  color: #ffffff !important;
  border: 1px solid rgba(255, 255, 255, 0.4);
  box-shadow: 0 0 15px var(--laser-cyan-glow), 0 0 30px var(--laser-violet-glow);
}

.btn-laser-primary:hover {
  transform: translateY(-2px);
  filter: brightness(1.15);
  box-shadow: 0 0 25px var(--laser-cyan-glow), 0 0 50px var(--laser-violet-glow);
}

.btn-laser-secondary {
  background: var(--bg-chamber);
  color: var(--text-photon);
  border: 1px solid var(--border-optic);
  backdrop-filter: blur(12px);
}

.btn-laser-secondary:hover {
  border-color: var(--laser-cyan);
  color: var(--laser-cyan);
  box-shadow: 0 0 16px var(--laser-cyan-glow);
  transform: translateY(-2px);
}

.btn-sm {
  padding: 8px 18px;
  font-size: 0.86rem;
}

.btn-lg {
  padding: 16px 36px;
  font-size: 1.05rem;
  letter-spacing: 0.02em;
}

.btn-block {
  width: 100%;
}

.btn svg {
  width: 18px;
  height: 18px;
  transition: transform var(--transition-fast);
}

.btn:hover svg {
  transform: translateX(4px);
}

/* ==========================================================================
   Header & Complete Dynamic Anchor Navigation
   ========================================================================== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: var(--bg-glass-nav);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-optic);
  transition: background-color var(--transition-normal), border-color var(--transition-normal);
}

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

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

.laser-cavity-emblem {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-sm);
  background: radial-gradient(circle at center, var(--laser-cyan) 0%, var(--laser-violet) 70%, #000 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #ffffff;
  border: 1px solid var(--laser-cyan);
  box-shadow: 0 0 14px var(--laser-cyan-glow);
}

.laser-cavity-emblem svg {
  width: 22px;
  height: 22px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 22px;
}

.nav-link {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
  position: relative;
  padding: 6px 0;
}

.nav-link:hover, .nav-link.active {
  color: var(--laser-cyan);
}

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

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

/* Highlight badge for newly required '推荐资讯' nav item */
.nav-badge-new {
  font-size: 0.68rem;
  padding: 1px 6px;
  border-radius: var(--radius-full);
  background: var(--laser-violet);
  color: #ffffff;
  font-family: var(--font-mono);
  margin-left: 4px;
  vertical-align: middle;
}

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

/* Refined Glassy Optical Aperture Theme Switcher */
.theme-toggle-btn {
  position: relative;
  width: 42px;
  height: 42px;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-optic);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  color: var(--text-photon);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-normal);
  overflow: hidden;
}

.theme-toggle-btn:hover {
  border-color: var(--laser-cyan);
  box-shadow: 0 0 15px var(--laser-cyan-glow);
  transform: scale(1.05);
}

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

.icon-sun {
  opacity: 1;
  transform: rotate(0deg) scale(1);
  color: var(--laser-amber);
}

.icon-moon {
  opacity: 0;
  transform: rotate(90deg) scale(0.5);
  color: var(--laser-cyan);
}

[data-theme="dark"] .icon-sun {
  opacity: 0;
  transform: rotate(-90deg) scale(0.5);
}

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

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

/* ==========================================================================
   Hero Section: Headline containing BoostNet + Subtitle + 简介
   ========================================================================== */
.hero {
  padding-top: 155px;
  padding-bottom: 90px;
  position: relative;
  overflow: hidden;
}

.optic-seed-glow {
  position: absolute;
  top: 80px;
  left: 50%;
  transform: translateX(-50%);
  width: 850px;
  height: 420px;
  background: radial-gradient(ellipse at center, var(--laser-cyan-glow) 0%, var(--laser-violet-glow) 40%, transparent 70%);
  filter: blur(70px);
  pointer-events: none;
  z-index: 0;
}

.hero-content {
  text-align: center;
  max-width: 960px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.hero-wavelength-tag {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 6px 18px;
  border-radius: var(--radius-sm);
  background: var(--bg-chamber);
  border: 1px solid var(--border-optic);
  margin-bottom: 24px;
  box-shadow: 0 0 20px var(--laser-cyan-glow);
}

.hero-title {
  font-size: clamp(2.5rem, 5.2vw, 4.2rem);
  font-weight: 900;
  line-height: 1.15;
  margin-bottom: 20px;
  letter-spacing: -0.03em;
}

.hero-subtitle {
  font-size: clamp(1.2rem, 2.2vw, 1.45rem);
  color: var(--laser-cyan);
  font-weight: 600;
  margin-bottom: 20px;
}

/* Prominent 简介 (Introduction / Summary) */
.hero-brief-chamber {
  background: var(--bg-chamber);
  border: 1px solid var(--border-optic);
  border-left: 3px solid var(--laser-cyan);
  border-radius: var(--radius-md);
  padding: 22px 28px;
  text-align: left;
  max-width: 860px;
  margin: 0 auto 36px auto;
  backdrop-filter: blur(14px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.brief-meta {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-mono-meta);
  margin-bottom: 8px;
  display: flex;
  justify-content: space-between;
}

.hero-brief-text {
  font-size: 1.05rem;
  color: var(--text-secondary);
  line-height: 1.8;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  margin-bottom: 50px;
  flex-wrap: wrap;
}

/* Stark Monolithic Spec Indicators (Sub-millisecond RTT & Frequencies) */
.chamber-specs-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  max-width: 980px;
  margin: 0 auto 60px auto;
}

.spec-chamber-card {
  background: var(--bg-chamber);
  border: 1px solid var(--border-subtle);
  padding: 20px 16px;
  border-radius: var(--radius-sm);
  text-align: center;
  transition: all var(--transition-normal);
  position: relative;
}

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

.spec-metric-number {
  font-family: var(--font-mono);
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--laser-cyan);
  margin-bottom: 4px;
}

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

/* ==========================================================================
   Stimulated Emission Chamber: Interactive Oscilloscope Jitter -> Laser Needle
   "Hovering over regional routes instantly flattens real-time oscilloscope
   jitter lines into a needle-sharp, steady laser-beam reading."
   ========================================================================== */
.oscilloscope-chamber-box {
  background: var(--bg-chamber-solid);
  border: 1px solid var(--border-optic);
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: 0 0 30px rgba(0, 0, 0, 0.4);
  position: relative;
  overflow: hidden;
}

.chamber-top-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 18px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border-subtle);
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--text-muted);
}

.live-cavity-indicator {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--laser-cyan);
  font-weight: 700;
}

.laser-pulse-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--laser-cyan);
  box-shadow: 0 0 10px var(--laser-cyan);
  animation: laserPulseAnim 1.6s infinite;
}

@keyframes laserPulseAnim {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.3; transform: scale(0.8); }
}

.routes-quantum-stream {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.route-laser-strip {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 16px 18px;
  cursor: pointer;
  transition: all var(--transition-laser);
  position: relative;
  overflow: hidden;
}

.route-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
}

.route-city {
  font-weight: 700;
  font-size: 0.96rem;
  display: flex;
  align-items: center;
  gap: 8px;
}

.route-rtt-tag {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--laser-cyan);
  font-weight: 700;
}

/* The Oscilloscope Waveform Canvas / SVG Container */
.oscilloscope-scope {
  width: 100%;
  height: 28px;
  margin: 10px 0;
  position: relative;
  display: flex;
  align-items: center;
}

.oscilloscope-wave-svg {
  width: 100%;
  height: 100%;
  transition: all var(--transition-laser);
}

.wave-jitter-path {
  fill: none;
  stroke: var(--laser-cyan);
  stroke-width: 1.5;
  stroke-dasharray: 2, 2;
  opacity: 0.7;
  transition: all var(--transition-laser);
}

/* Hover Interaction: Instant needle-sharp flat laser beam reading */
.route-laser-strip:hover {
  border-color: var(--laser-cyan);
  background: rgba(0, 240, 255, 0.04);
  box-shadow: 0 0 25px var(--laser-cyan-glow);
}

.route-laser-strip:hover .wave-jitter-path {
  stroke: #ffffff;
  stroke-width: 2.5;
  stroke-dasharray: none;
  filter: drop-shadow(0 0 8px var(--laser-cyan));
  d: path("M 0,14 L 300,14");
}

.route-laser-strip:hover .route-telemetry-text {
  color: var(--laser-cyan);
  font-weight: 700;
}

.route-telemetry-text {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  display: flex;
  justify-content: space-between;
  transition: color var(--transition-fast);
}

/* ==========================================================================
   Section: Core Advantages (3 Stark Monolithic Optical Chambers)
   ========================================================================== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.feature-chamber {
  background: var(--bg-chamber);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 36px 28px;
  transition: all var(--transition-normal);
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
}

.feature-chamber::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--gradient-laser-beam);
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.feature-chamber:hover {
  transform: translateY(-6px);
  border-color: var(--border-optic);
  box-shadow: 0 0 30px var(--laser-cyan-glow);
}

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

.optical-schematic-icon {
  width: 54px;
  height: 54px;
  border-radius: var(--radius-sm);
  background: rgba(0, 240, 255, 0.06);
  border: 1px solid var(--border-optic);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--laser-cyan);
  margin-bottom: 24px;
  box-shadow: 0 0 16px var(--laser-cyan-glow);
}

.optical-schematic-icon svg {
  width: 28px;
  height: 28px;
}

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

.feature-desc {
  font-size: 0.98rem;
  color: var(--text-secondary);
  line-height: 1.75;
  margin-bottom: 22px;
  flex-grow: 1;
}

.feature-metric-tags {
  display: flex;
  flex-direction: column;
  gap: 10px;
  border-top: 1px solid var(--border-subtle);
  padding-top: 18px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.feature-metric-item {
  display: flex;
  align-items: center;
  gap: 10px;
}

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

/* ==========================================================================
   Section: Streaming Unlock Showcase
   ========================================================================== */
.streaming-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.streaming-chamber {
  background: var(--bg-chamber);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 26px 22px;
  transition: all var(--transition-normal);
  display: flex;
  flex-direction: column;
}

.streaming-chamber:hover {
  transform: translateY(-4px);
  border-color: var(--laser-cyan);
  box-shadow: 0 0 20px var(--laser-cyan-glow);
}

.streaming-header {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 14px;
}

.streaming-logo {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #ffffff;
  flex-shrink: 0;
}

.logo-netflix { background: #e50914; }
.logo-youtube { background: #ff0000; }
.logo-disney { background: linear-gradient(135deg, #0f2c9e, #05103a); }
.logo-spotify { background: #1ed760; }
.logo-hbo { background: #5822b4; }
.logo-hulu { background: #1ce783; color: #000; }

.streaming-logo svg {
  width: 24px;
  height: 24px;
}

.streaming-meta h3 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-photon);
  margin-bottom: 4px;
}

.streaming-badge {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  padding: 2px 7px;
  border-radius: var(--radius-sm);
  background: rgba(0, 240, 255, 0.08);
  color: var(--laser-cyan);
  border: 1px solid var(--border-optic);
}

.streaming-desc {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.65;
}

/* ==========================================================================
   Section: AI Tools Support Showcase (Strictly Zero Generic AI Icons)
   ========================================================================== */
.ai-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.ai-chamber {
  background: var(--bg-chamber);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 26px 22px;
  transition: all var(--transition-normal);
  display: flex;
  flex-direction: column;
}

.ai-chamber:hover {
  transform: translateY(-4px);
  border-color: var(--laser-violet);
  box-shadow: 0 0 22px var(--laser-violet-glow);
}

.ai-chamber-header {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 14px;
}

.ai-optic-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #ffffff;
  flex-shrink: 0;
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.icon-chatgpt { background: #10a37f; }
.icon-claude { background: #d97706; }
.icon-midjourney { background: #22272e; }
.icon-gemini { background: linear-gradient(135deg, #1a73e8, #7c3aed); }
.icon-copilot { background: #1f2428; }
.icon-sora { background: linear-gradient(135deg, #ec4899, #7c3aed); }

.ai-optic-icon svg {
  width: 24px;
  height: 24px;
}

.ai-meta h3 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-photon);
  margin-bottom: 4px;
}

.ai-badge {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  padding: 2px 7px;
  border-radius: var(--radius-sm);
  background: rgba(124, 58, 237, 0.12);
  color: var(--laser-violet);
  border: 1px solid rgba(124, 58, 237, 0.3);
}

[data-theme="dark"] .ai-badge {
  color: #a78bfa;
}

.ai-desc {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.65;
}

/* ==========================================================================
   Section: Real-Market Pricing Comparison Table (网上真实套餐价格标准)
   ========================================================================== */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  align-items: stretch;
}

.pricing-chamber {
  background: var(--bg-chamber);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 38px 28px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: all var(--transition-normal);
}

.pricing-chamber.popular {
  border-color: var(--laser-cyan);
  box-shadow: 0 0 35px var(--laser-cyan-glow);
  transform: scale(1.02);
  z-index: 2;
}

.popular-laser-tag {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--gradient-laser-beam);
  color: #ffffff;
  padding: 5px 18px;
  border-radius: var(--radius-full);
  font-size: 0.78rem;
  font-weight: 700;
  font-family: var(--font-mono);
  letter-spacing: 0.04em;
  white-space: nowrap;
  box-shadow: 0 0 15px var(--laser-cyan-glow);
  pointer-events: none;
}

.pricing-header {
  margin-bottom: 20px;
  text-align: center;
}

.pricing-title {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--text-photon);
  margin-bottom: 6px;
}

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

.pricing-cost {
  margin: 18px 0;
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 4px;
}

.currency {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--laser-cyan);
}

.amount {
  font-size: 3.2rem;
  font-weight: 900;
  line-height: 1;
  color: var(--text-photon);
  font-family: var(--font-mono);
}

.period {
  font-size: 0.92rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

.pricing-features {
  display: flex;
  flex-direction: column;
  gap: 13px;
  margin: 24px 0;
  padding: 22px 0;
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
  flex-grow: 1;
}

.pricing-feature-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.92rem;
  color: var(--text-secondary);
}

.pricing-feature-item svg {
  width: 16px;
  height: 16px;
  color: var(--laser-cyan);
  flex-shrink: 0;
}

.pricing-feature-item.disabled {
  color: var(--text-muted);
  text-decoration: line-through;
  opacity: 0.5;
}

.pricing-feature-item.disabled svg {
  color: var(--text-muted);
}

/* ==========================================================================
   Section: User Reviews (真实口碑评价)
   ========================================================================== */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.review-chamber {
  background: var(--bg-chamber);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 28px 22px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: all var(--transition-normal);
}

.review-chamber:hover {
  transform: translateY(-4px);
  border-color: var(--laser-cyan);
  box-shadow: 0 0 20px var(--laser-cyan-glow);
}

.review-stars {
  display: flex;
  gap: 4px;
  color: var(--laser-amber);
  margin-bottom: 14px;
}

.review-stars svg {
  width: 17px;
  height: 17px;
  fill: currentColor;
}

.review-text {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 20px;
  flex-grow: 1;
}

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

.author-optic-avatar {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  background: var(--gradient-laser-beam);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-family: var(--font-mono);
}

.author-info h4 {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-photon);
}

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

/* ==========================================================================
   Section: FAQ (常见问题解答)
   ========================================================================== */
.faq-container {
  max-width: 820px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

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

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

.faq-question {
  width: 100%;
  text-align: left;
  padding: 20px 24px;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-photon);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  background: transparent;
}

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

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

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-laser), padding var(--transition-laser);
  padding: 0 24px;
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.75;
}

.faq-item.active .faq-answer {
  max-height: 380px;
  padding: 0 24px 22px 24px;
}

/* ==========================================================================
   Bottom Strong CTA Banner
   ========================================================================== */
.bottom-cta-chamber {
  background: radial-gradient(circle at center, var(--bg-chamber-solid) 0%, #000 100%);
  border: 1px solid var(--border-optic);
  border-radius: var(--radius-md);
  padding: 60px 36px;
  text-align: center;
  color: #ffffff;
  position: relative;
  overflow: hidden;
  box-shadow: 0 0 50px var(--laser-cyan-glow);
  margin-bottom: 90px;
}

.bottom-cta-chamber h2 {
  font-size: clamp(2rem, 3.8vw, 2.8rem);
  font-weight: 800;
  margin-bottom: 16px;
  color: #ffffff;
}

.bottom-cta-chamber p {
  font-size: 1.1rem;
  color: #94a3b8;
  max-width: 660px;
  margin: 0 auto 34px auto;
}

/* ==========================================================================
   Footer (Strictly 4 Required Titles, Each Opening in New Page)
   ========================================================================== */
.footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-subtle);
  padding: 50px 0 40px 0;
  transition: background-color var(--transition-normal);
}

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

.footer-links {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 36px;
  flex-wrap: wrap;
}

.footer-link {
  font-size: 0.98rem;
  font-weight: 600;
  color: var(--text-secondary);
  transition: color var(--transition-fast);
  padding: 4px 6px;
}

.footer-link:hover {
  color: var(--laser-cyan);
}

.footer-copyright {
  font-size: 0.85rem;
  color: var(--text-muted);
  text-align: center;
  font-family: var(--font-mono);
}

/* ==========================================================================
   Sub-pages & News / Insights Page Styling (tech-intel-8a2.html)
   ========================================================================== */
.page-header {
  padding-top: 140px;
  padding-bottom: 40px;
  text-align: center;
  border-bottom: 1px solid var(--border-subtle);
  background: var(--bg-secondary);
}

.page-header h1 {
  font-size: clamp(2.2rem, 4vw, 3rem);
  font-weight: 800;
  margin-bottom: 14px;
  letter-spacing: -0.02em;
}

.page-header p {
  color: var(--text-secondary);
  font-size: 1.1rem;
  max-width: 680px;
  margin: 0 auto;
}

.page-content-wrapper {
  padding-top: 60px;
  padding-bottom: 90px;
  max-width: 920px;
  margin: 0 auto;
}

/* Prose layout for policies and articles */
.prose {
  font-size: 1.02rem;
  line-height: 1.85;
  color: var(--text-secondary);
}

.prose h2 {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--text-photon);
  margin-top: 48px;
  margin-bottom: 18px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.prose h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-photon);
  margin-top: 32px;
  margin-bottom: 12px;
}

.prose p {
  margin-bottom: 20px;
}

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

.prose li {
  margin-bottom: 10px;
}

.prose .callout {
  background: var(--bg-chamber);
  border-left: 4px solid var(--laser-cyan);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  padding: 20px 24px;
  margin: 28px 0;
  border-top: 1px solid var(--border-subtle);
  border-right: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
}

.prose .callout-warning {
  border-left-color: #ef4444;
  background: rgba(239, 68, 68, 0.05);
}

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

/* News / Insights Cards for tech-intel-8a2.html */
.intel-articles-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
}

.intel-article-card {
  background: var(--bg-chamber);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 32px 28px;
  transition: all var(--transition-normal);
  display: flex;
  flex-direction: column;
}

.intel-article-card:hover {
  border-color: var(--laser-cyan);
  box-shadow: 0 0 25px var(--laser-cyan-glow);
  transform: translateY(-3px);
}

.article-meta-line {
  display: flex;
  align-items: center;
  gap: 14px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-mono-meta);
  margin-bottom: 12px;
}

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

.article-summary {
  font-size: 0.98rem;
  color: var(--text-secondary);
  line-height: 1.75;
  margin-bottom: 20px;
}

/* ==========================================================================
   Responsive Media Queries (@media)
   ========================================================================== */
@media (max-width: 1024px) {
  .features-grid,
  .streaming-grid,
  .ai-grid,
  .pricing-grid,
  .reviews-grid,
  .routes-quantum-stream {
    grid-template-columns: repeat(2, 1fr);
  }

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

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

@media (max-width: 768px) {
  .section {
    padding-top: 64px;
    padding-bottom: 64px;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border-optic);
    padding: 20px 24px;
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
    box-shadow: 0 20px 30px rgba(0, 0, 0, 0.4);
  }

  .nav-links.active {
    display: flex;
  }

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

  .hero {
    padding-top: 115px;
    padding-bottom: 60px;
  }

  .chamber-specs-grid,
  .features-grid,
  .streaming-grid,
  .ai-grid,
  .pricing-grid,
  .reviews-grid,
  .routes-quantum-stream {
    grid-template-columns: 1fr;
    gap: 18px;
  }

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

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

  .footer-links {
    flex-direction: column;
    gap: 16px;
  }
}

@media (max-width: 480px) {
  .spec-metric-number {
    font-size: 1.5rem;
  }

  .popular-laser-tag {
    font-size: 0.72rem;
    padding: 4px 12px;
    letter-spacing: 0.02em;
  }

  .pricing-chamber {
    padding: 30px 20px;
  }

  .bottom-cta-chamber {
    padding: 40px 20px;
  }
}