/* ==========================================================================
   BoostNet - Cryogenic Superconducting UI Design System
   Ice-Luxury Scientific Palette | Zero-Resistance Spatial Architecture
   Deep Cryogenic Slate (#080c14) · Liquid Helium Blue (#00a6ff) · Bismuth Silver
   Pure Native CSS | Zero External Dependencies | Zero-Latency Execution
   ========================================================================== */

:root {
  /* Cryogenic Light Mode (Default: Frozen Bismuth Crystal & Pristine Frost) */
  --bg-primary: #f8fafc;
  --bg-secondary: #f0f4f9;
  --bg-tertiary: #e2e8f0;
  --bg-card: rgba(255, 255, 255, 0.88);
  --bg-card-hover: rgba(255, 255, 255, 0.98);
  --bg-card-elevated: #ffffff;
  --bg-glass: rgba(248, 250, 252, 0.82);
  --bg-glass-card: rgba(255, 255, 255, 0.75);
  
  --border-color: rgba(203, 213, 225, 0.7);
  --border-light: rgba(226, 232, 240, 0.6);
  --border-bismuth: rgba(0, 166, 255, 0.25);
  --border-focus: #0088e0;
  
  --text-primary: #090e17;
  --text-secondary: #334155;
  --text-muted: #64748b;
  --text-light: #94a3b8;
  
  /* Liquid Helium Absolute Blue & Cryogenic Flux */
  --helium-blue: #008be3;
  --helium-cyan: #00bcd4;
  --helium-glow: rgba(0, 139, 227, 0.22);
  --bismuth-silver: #94a3b8;
  
  --accent-primary: #008be3;
  --accent-primary-hover: #0070b8;
  --accent-glow: rgba(0, 139, 227, 0.25);
  --accent-gradient: linear-gradient(135deg, #008be3 0%, #0284c7 45%, #6366f1 100%);
  --accent-gradient-subtle: linear-gradient(135deg, rgba(0, 139, 227, 0.08) 0%, rgba(99, 102, 241, 0.06) 100%);
  --wafer-gradient: linear-gradient(135deg, #e0f2fe 0%, #bae6fd 40%, #7dd3fc 70%, #38bdf8 100%);
  --flux-glow: rgba(0, 139, 227, 0.35);

  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
  
  --shadow-sm: 0 1px 3px 0 rgba(8, 12, 20, 0.04);
  --shadow-md: 0 4px 12px -2px rgba(8, 12, 20, 0.06), 0 2px 6px -1px rgba(0, 139, 227, 0.04);
  --shadow-lg: 0 12px 28px -4px rgba(8, 12, 20, 0.08), 0 4px 12px -2px rgba(0, 139, 227, 0.06);
  --shadow-xl: 0 24px 44px -8px rgba(8, 12, 20, 0.12), 0 8px 18px -4px rgba(0, 139, 227, 0.08);
  --shadow-quantum: 0 16px 40px -6px rgba(0, 139, 227, 0.25), 0 0 20px rgba(0, 188, 212, 0.15);

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;

  --transition-fast: 0.18s ease;
  --transition-normal: 0.28s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-slow: 0.5s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-levitation: 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
  
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --max-width: 1220px;
}

/* Cryogenic Dark Mode: Deep Slate #080c14 + Liquid Helium Blue #00a6ff */
[data-theme="dark"] {
  --bg-primary: #080c14;
  --bg-secondary: #0c121e;
  --bg-tertiary: #131b2e;
  --bg-card: rgba(14, 21, 37, 0.78);
  --bg-card-hover: rgba(19, 29, 50, 0.92);
  --bg-card-elevated: #101828;
  --bg-glass: rgba(8, 12, 20, 0.84);
  --bg-glass-card: rgba(14, 21, 37, 0.72);
  
  --border-color: rgba(30, 48, 77, 0.65);
  --border-light: rgba(22, 35, 57, 0.6);
  --border-bismuth: rgba(0, 166, 255, 0.3);
  --border-focus: #00a6ff;
  
  --text-primary: #f0f6fc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --text-light: #475569;
  
  /* Liquid Helium Absolute Blue & Quantum Flux */
  --helium-blue: #00a6ff;
  --helium-cyan: #00e5ff;
  --helium-glow: rgba(0, 166, 255, 0.35);
  --bismuth-silver: #e2e8f0;
  
  --accent-primary: #00a6ff;
  --accent-primary-hover: #38bdf8;
  --accent-glow: rgba(0, 166, 255, 0.38);
  --accent-gradient: linear-gradient(135deg, #00a6ff 0%, #0284c7 50%, #7c3aed 100%);
  --accent-gradient-subtle: linear-gradient(135deg, rgba(0, 166, 255, 0.12) 0%, rgba(124, 58, 237, 0.08) 100%);
  --wafer-gradient: linear-gradient(135deg, #1e293b 0%, #0f172a 40%, #002244 80%, #00a6ff 100%);
  --flux-glow: rgba(0, 166, 255, 0.45);

  --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.5);
  --shadow-md: 0 4px 14px -2px rgba(0, 0, 0, 0.6), 0 2px 8px -1px rgba(0, 166, 255, 0.15);
  --shadow-lg: 0 14px 32px -4px rgba(0, 0, 0, 0.75), 0 4px 16px -2px rgba(0, 166, 255, 0.2);
  --shadow-xl: 0 26px 50px -8px rgba(0, 0, 0, 0.85), 0 8px 24px -4px rgba(0, 166, 255, 0.25);
  --shadow-quantum: 0 20px 50px -8px rgba(0, 166, 255, 0.45), 0 0 35px rgba(0, 229, 255, 0.28);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 86px;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-family);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  transition: background-color var(--transition-normal), color var(--transition-normal);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  background-image: 
    radial-gradient(ellipse at 50% 0%, rgba(0, 166, 255, 0.07) 0%, transparent 60%),
    linear-gradient(to right, rgba(0, 166, 255, 0.02) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(0, 166, 255, 0.02) 1px, transparent 1px);
  background-size: 100% 100%, 48px 48px, 48px 48px;
}

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

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

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

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

/* ==========================================================================
   Header & Navigation
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: var(--bg-glass);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--border-color);
  transition: background-color var(--transition-normal), border-color var(--transition-normal);
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 74px;
  gap: 16px;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 1.35rem;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  flex-shrink: 0;
}

.site-logo {
  height: 38px;
  width: auto;
  display: block;
  object-fit: contain;
  transition: opacity var(--transition-fast);
}

.logo-for-light {
  display: block;
}
.logo-for-dark {
  display: none;
}

[data-theme="dark"] .logo-for-light {
  display: none;
}
[data-theme="dark"] .logo-for-dark {
  display: block;
}

.brand-tag {
  font-size: 0.68rem;
  font-weight: 700;
  padding: 2px 7px;
  border-radius: var(--radius-sm);
  background-color: var(--bg-tertiary);
  color: var(--accent-primary);
  border: 1px solid var(--border-bismuth);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

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

.nav-link {
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
  position: relative;
  padding: 6px 2px;
}

.nav-link:hover {
  color: var(--accent-primary);
}

.nav-link::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--accent-primary);
  box-shadow: 0 0 8px var(--helium-glow);
  transition: width var(--transition-fast), left var(--transition-fast);
  border-radius: 2px;
}

.nav-link:hover::after {
  width: 100%;
  left: 0;
}

/* Highlight badge for "推荐资讯" entry */
.nav-link-news {
  display: inline-flex;
  align-items: center;
  gap: 5px;
}

.nav-badge-hot {
  font-size: 0.65rem;
  font-weight: 700;
  padding: 1px 5px;
  border-radius: 4px;
  background: linear-gradient(135deg, #00a6ff, #00bcd4);
  color: #ffffff;
  letter-spacing: 0.02em;
  line-height: 1.2;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

/* Translucent Cryogenic Day/Night Switch Button */
.theme-toggle-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  background: rgba(148, 163, 184, 0.1);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  cursor: pointer;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.theme-toggle-btn:hover {
  background: rgba(0, 166, 255, 0.15);
  border-color: var(--accent-primary);
  box-shadow: 0 0 14px var(--helium-glow);
  transform: translateY(-1px);
}

.theme-toggle-btn svg {
  width: 19px;
  height: 19px;
  stroke: currentColor;
  stroke-width: 2.1;
  stroke-linecap: round;
  stroke-linejoin: round;
  fill: none;
  transition: transform var(--transition-slow);
}

.icon-sun {
  display: none;
}
.icon-moon {
  display: block;
}

[data-theme="dark"] .icon-sun {
  display: block;
}
[data-theme="dark"] .icon-moon {
  display: none;
}

/* Mobile Nav Toggle */
.mobile-menu-btn {
  display: none;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  background: var(--bg-tertiary);
  color: var(--text-primary);
}

/* ==========================================================================
   Buttons & CTA Elements
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--transition-normal);
  text-align: center;
  white-space: nowrap;
  line-height: 1;
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: var(--accent-gradient);
  color: #ffffff !important;
  box-shadow: 0 4px 18px var(--accent-glow);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 24px var(--flux-glow);
  filter: brightness(1.08);
}

.btn-secondary {
  background: var(--bg-card);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
  backdrop-filter: blur(12px);
}

.btn-secondary:hover {
  background: var(--bg-card-hover);
  border-color: var(--accent-primary);
  transform: translateY(-2px);
  box-shadow: 0 4px 14px var(--helium-glow);
}

.btn-sm {
  padding: 8px 18px;
  font-size: 0.875rem;
}

.btn-lg {
  padding: 15px 34px;
  font-size: 1.05rem;
  font-weight: 600;
}

.btn-full {
  width: 100%;
}

/* ==========================================================================
   Hero Section with 3D Quantum Levitation Wafer Visual Anchor
   ========================================================================== */
.hero-section {
  position: relative;
  padding: 85px 0 75px 0;
  overflow: hidden;
}

.hero-background-glow {
  position: absolute;
  top: -140px;
  left: 50%;
  transform: translateX(-50%);
  width: 900px;
  height: 520px;
  background: radial-gradient(circle at 50% 40%, var(--helium-glow) 0%, rgba(0, 166, 255, 0.05) 45%, transparent 75%);
  filter: blur(75px);
  z-index: -1;
  pointer-events: none;
}

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

.hero-content {
  text-align: left;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 6px 16px;
  border-radius: var(--radius-full);
  background: var(--accent-gradient-subtle);
  border: 1px solid var(--border-bismuth);
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--accent-primary);
  margin-bottom: 22px;
  letter-spacing: 0.03em;
  box-shadow: 0 0 14px var(--helium-glow);
}

.hero-badge-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--accent-primary);
  box-shadow: 0 0 10px var(--accent-primary);
  animation: pulse-flux 2.5s infinite;
}

@keyframes pulse-flux {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.35); opacity: 0.7; }
}

.hero-title {
  font-size: 3.4rem;
  font-weight: 900;
  line-height: 1.18;
  letter-spacing: -0.03em;
  margin-bottom: 22px;
  color: var(--text-primary);
}

.hero-title-highlight {
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  position: relative;
  display: inline-block;
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--text-primary);
  font-weight: 600;
  margin-bottom: 12px;
  line-height: 1.45;
}

.hero-desc {
  font-size: 1.02rem;
  color: var(--text-secondary);
  line-height: 1.75;
  margin-bottom: 34px;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 40px;
  flex-wrap: wrap;
}

/* 3D Quantum Superconductor Levitation Anchor */
.levitation-stage-wrap {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  perspective: 1200px;
}

.quantum-scene {
  position: relative;
  width: 360px;
  height: 380px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  transform-style: preserve-3d;
  transition: transform var(--transition-levitation);
}

/* Neodymium Magnetic Base Plate */
.magnetic-base-plate {
  position: absolute;
  bottom: 30px;
  width: 320px;
  height: 120px;
  border-radius: 50%;
  background: radial-gradient(ellipse at 50% 50%, rgba(0, 166, 255, 0.28) 0%, rgba(14, 21, 37, 0.95) 60%, rgba(8, 12, 20, 0.98) 100%);
  border: 2px solid var(--border-bismuth);
  box-shadow: 0 0 35px var(--helium-glow), inset 0 0 25px rgba(0, 166, 255, 0.2);
  transform: rotateX(65deg);
  display: flex;
  align-items: center;
  justify-content: center;
}

.magnetic-flux-ring {
  position: absolute;
  border-radius: 50%;
  border: 1px dashed var(--accent-primary);
  opacity: 0.6;
  animation: rotate-flux 16s linear infinite;
}

.flux-ring-1 { width: 240px; height: 90px; }
.flux-ring-2 { width: 170px; height: 60px; animation-direction: reverse; animation-duration: 10s; }

@keyframes rotate-flux {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

/* Floating Superconductor Wafer (Zero Resistance) */
.superconductor-wafer {
  position: relative;
  width: 250px;
  height: 170px;
  border-radius: 20px;
  background: var(--bg-card);
  border: 1px solid var(--border-bismuth);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: var(--shadow-quantum);
  display: flex;
  flex-direction: column;
  padding: 22px;
  z-index: 10;
  transform: translateY(-40px) rotateX(15deg) rotateY(-10deg);
  animation: quantum-float 5s ease-in-out infinite;
  cursor: pointer;
  transition: all var(--transition-normal);
}

.superconductor-wafer:hover {
  transform: translateY(-55px) rotateX(8deg) rotateY(-4deg) scale(1.04);
  border-color: var(--accent-primary);
  box-shadow: 0 25px 60px -10px var(--flux-glow), 0 0 40px rgba(0, 229, 255, 0.4);
}

@keyframes quantum-float {
  0%, 100% {
    transform: translateY(-40px) rotateX(15deg) rotateY(-10deg);
  }
  50% {
    transform: translateY(-58px) rotateX(12deg) rotateY(-6deg);
  }
}

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

.wafer-status-tag {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--accent-primary);
  background: rgba(0, 166, 255, 0.12);
  padding: 3px 10px;
  border-radius: var(--radius-full);
  border: 1px solid var(--border-bismuth);
}

.wafer-temp {
  font-family: monospace;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--text-muted);
}

.wafer-title {
  font-size: 1.15rem;
  font-weight: 800;
  margin-bottom: 6px;
  color: var(--text-primary);
}

.wafer-metric-row {
  display: flex;
  align-items: baseline;
  gap: 6px;
  margin-bottom: 12px;
}

.wafer-metric-val {
  font-size: 2rem;
  font-weight: 900;
  color: var(--accent-primary);
  line-height: 1;
}

.wafer-metric-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-weight: 500;
}

.wafer-footer-bar {
  margin-top: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 10px;
  border-top: 1px solid var(--border-light);
  font-size: 0.76rem;
  color: var(--text-secondary);
}

.flux-pin-spark {
  position: absolute;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--helium-cyan);
  box-shadow: 0 0 12px var(--helium-cyan);
}

/* ==========================================================================
   Trust & Key Metrics Bar
   ========================================================================== */
.hero-stats-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  padding: 24px 30px;
  background: var(--bg-glass-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  box-shadow: var(--shadow-md);
  margin-top: 50px;
}

.stat-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 4px;
}

.stat-number {
  font-size: 1.85rem;
  font-weight: 900;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

.stat-label {
  font-size: 0.85rem;
  color: var(--text-muted);
  font-weight: 500;
}

/* ==========================================================================
   Section Headers
   ========================================================================== */
.section {
  padding: 85px 0;
  position: relative;
}

.section-alt {
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border-light);
  border-bottom: 1px solid var(--border-light);
}

.section-header {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 54px auto;
}

.section-pill {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent-primary);
  background: var(--accent-gradient-subtle);
  border: 1px solid var(--border-bismuth);
  padding: 4px 14px;
  border-radius: var(--radius-full);
  margin-bottom: 14px;
}

.section-title {
  font-size: 2.35rem;
  font-weight: 800;
  letter-spacing: -0.025em;
  margin-bottom: 14px;
  color: var(--text-primary);
  line-height: 1.25;
}

.section-desc {
  font-size: 1.05rem;
  color: var(--text-secondary);
  line-height: 1.65;
}

/* ==========================================================================
   Interactive Superconducting Node Ping Matrix (0 Kelvin Hover State)
   ========================================================================== */
.nodes-matrix-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-top: 12px;
}

.node-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 22px 20px;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
  cursor: pointer;
}

.node-card:hover {
  transform: translateY(-4px);
  border-color: var(--accent-primary);
  box-shadow: 0 10px 28px -4px var(--helium-glow);
}

/* Magnetic flux pin line across border on hover */
.node-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--helium-cyan), var(--accent-primary), transparent);
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.node-card:hover::before {
  opacity: 1;
}

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

.node-region {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--text-primary);
}

.node-flag {
  font-size: 1.25rem;
}

.node-temp-state {
  font-family: monospace;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--text-muted);
  padding: 2px 8px;
  border-radius: var(--radius-full);
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  transition: all var(--transition-fast);
}

/* On hover: temperature drops to 0 Kelvin / Zero Resistance */
.node-card:hover .node-temp-state {
  color: #ffffff;
  background: var(--accent-gradient);
  border-color: var(--accent-primary);
  box-shadow: 0 0 10px var(--helium-glow);
}

.node-ping-display {
  display: flex;
  align-items: baseline;
  gap: 5px;
  margin-bottom: 12px;
}

.node-ping-ms {
  font-size: 1.85rem;
  font-weight: 900;
  color: var(--text-primary);
  letter-spacing: -0.02em;
  transition: color var(--transition-fast);
}

.node-card:hover .node-ping-ms {
  color: var(--accent-primary);
}

.node-ping-unit {
  font-size: 0.85rem;
  color: var(--text-muted);
  font-weight: 600;
}

.node-thermal-graph {
  width: 100%;
  height: 6px;
  background: var(--bg-tertiary);
  border-radius: var(--radius-full);
  overflow: hidden;
  position: relative;
  margin-bottom: 12px;
}

.thermal-fill {
  height: 100%;
  border-radius: var(--radius-full);
  background: var(--accent-gradient);
  box-shadow: 0 0 8px var(--helium-glow);
  transition: width var(--transition-slow);
}

.node-line-type {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.78rem;
  color: var(--text-secondary);
}

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

.advantage-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 38px 32px;
  transition: all var(--transition-normal);
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.advantage-card:hover {
  transform: translateY(-6px);
  border-color: var(--accent-primary);
  box-shadow: var(--shadow-xl);
}

.advantage-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: var(--accent-gradient);
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.advantage-card:hover::before {
  opacity: 1;
}

.card-icon-box {
  width: 60px;
  height: 60px;
  border-radius: var(--radius-md);
  background: var(--accent-gradient-subtle);
  border: 1px solid var(--border-bismuth);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-primary);
  margin-bottom: 24px;
  box-shadow: 0 4px 14px var(--helium-glow);
}

.card-icon-box svg {
  width: 32px;
  height: 32px;
}

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

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

.advantage-highlights {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding-top: 18px;
  border-top: 1px solid var(--border-light);
}

.advantage-highlights li {
  display: flex;
  align-items: center;
  gap: 9px;
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text-primary);
}

.advantage-highlights li svg {
  width: 16px;
  height: 16px;
  color: var(--helium-blue);
  flex-shrink: 0;
}

/* ==========================================================================
   Streaming Showcase
   ========================================================================== */
.streaming-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.stream-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 26px 20px;
  transition: all var(--transition-normal);
  text-align: center;
  position: relative;
  backdrop-filter: blur(10px);
}

.stream-card:hover {
  transform: translateY(-5px);
  border-color: var(--accent-primary);
  box-shadow: var(--shadow-lg);
}

.stream-icon-badge {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-md);
  margin: 0 auto 16px auto;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  font-weight: 800;
  color: #fff;
  box-shadow: var(--shadow-sm);
}

.stream-title {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 6px;
  color: var(--text-primary);
}

.stream-meta {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 14px;
}

.stream-tag {
  display: inline-block;
  padding: 4px 10px;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 600;
  background-color: var(--bg-tertiary);
  color: var(--accent-primary);
  border: 1px solid var(--border-color);
}

.bg-netflix { background: linear-gradient(135deg, #e50914, #b81d24); }
.bg-youtube { background: linear-gradient(135deg, #ff0000, #cc0000); }
.bg-disney { background: linear-gradient(135deg, #113ccf, #0c2069); }
.bg-hbomax { background: linear-gradient(135deg, #6c2cfb, #4313ad); }
.bg-spotify { background: linear-gradient(135deg, #1ed760, #169c46); }
.bg-tiktok { background: linear-gradient(135deg, #000000, #25f4ee); }
.bg-twitch { background: linear-gradient(135deg, #9146ff, #6441a5); }
.bg-amazon { background: linear-gradient(135deg, #00a8e1, #0073a8); }

/* ==========================================================================
   AI Productivity Showcase
   ========================================================================== */
.ai-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.ai-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 30px;
  transition: all var(--transition-normal);
  display: flex;
  flex-direction: column;
  backdrop-filter: blur(12px);
}

.ai-card:hover {
  transform: translateY(-5px);
  border-color: var(--accent-primary);
  box-shadow: var(--shadow-lg);
}

.ai-header {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 16px;
}

.ai-icon-box {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 800;
  flex-shrink: 0;
}

.bg-chatgpt { background: linear-gradient(135deg, #10a37f, #0d8467); }
.bg-claude { background: linear-gradient(135deg, #d97706, #b45309); }
.bg-midjourney { background: linear-gradient(135deg, #2b2d42, #1f202e); }
.bg-gemini { background: linear-gradient(135deg, #1a73e8, #8ab4f8); }
.bg-copilot { background: linear-gradient(135deg, #0078d4, #004578); }
.bg-cursor { background: linear-gradient(135deg, #6366f1, #4338ca); }

.ai-name {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-primary);
}

.ai-status {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--success);
  display: flex;
  align-items: center;
  gap: 5px;
}

.ai-status::before {
  content: "";
  display: inline-block;
  width: 6px;
  height: 6px;
  background-color: var(--success);
  border-radius: 50%;
  box-shadow: 0 0 6px var(--success);
}

.ai-desc {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 18px;
  flex-grow: 1;
}

.ai-features {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
}

.ai-badge {
  font-size: 0.75rem;
  padding: 3px 9px;
  border-radius: var(--radius-sm);
  background-color: var(--bg-tertiary);
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
}

/* ==========================================================================
   Pricing Section (Real Market Rates)
   ========================================================================== */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  align-items: stretch;
}

.pricing-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 38px 32px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: all var(--transition-normal);
  box-shadow: var(--shadow-sm);
  backdrop-filter: blur(12px);
}

.pricing-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-xl);
}

.pricing-card.featured {
  border-color: var(--accent-primary);
  box-shadow: 0 12px 36px -6px var(--helium-glow);
  transform: scale(1.03);
}

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

.popular-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--accent-gradient);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 4px 15px;
  border-radius: var(--radius-full);
  box-shadow: 0 2px 10px var(--accent-glow);
}

.pricing-tier-name {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.pricing-tier-desc {
  font-size: 0.9rem;
  color: var(--text-muted);
  min-height: 42px;
  margin-bottom: 20px;
}

.pricing-price-wrap {
  display: flex;
  align-items: baseline;
  gap: 4px;
  margin-bottom: 24px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border-color);
}

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

.price-amount {
  font-size: 3.1rem;
  font-weight: 900;
  line-height: 1;
  color: var(--text-primary);
  letter-spacing: -0.03em;
}

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

.pricing-features-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-bottom: 32px;
  flex-grow: 1;
}

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

.pricing-features-list li.highlight {
  font-weight: 600;
  color: var(--text-primary);
}

.pricing-features-list li svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  color: var(--accent-primary);
}

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

.review-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 32px;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
  backdrop-filter: blur(12px);
}

.review-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--accent-primary);
}

.review-stars {
  display: flex;
  gap: 4px;
  color: #f59e0b;
  margin-bottom: 16px;
}

.review-stars svg {
  width: 18px;
  height: 18px;
  fill: currentColor;
}

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

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

.author-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--accent-gradient-subtle);
  border: 1px solid var(--border-bismuth);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: var(--accent-primary);
  font-size: 1rem;
}

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

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

/* ==========================================================================
   FAQ Section
   ========================================================================== */
.faq-wrap {
  max-width: 840px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color var(--transition-fast);
  backdrop-filter: blur(10px);
}

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

.faq-question {
  width: 100%;
  padding: 20px 24px;
  text-align: left;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-primary);
  background: none;
  cursor: pointer;
}

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

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

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-slow), padding var(--transition-normal);
  padding: 0 24px;
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.7;
}

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

/* ==========================================================================
   Footer (Strictly 4 Navigation Titles Opening in New Tabs)
   ========================================================================== */
.site-footer {
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: 50px 0 38px 0;
  transition: background-color var(--transition-normal), border-color var(--transition-normal);
}

.footer-nav-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 44px;
  margin-bottom: 28px;
  flex-wrap: wrap;
}

.footer-link {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-secondary);
  transition: color var(--transition-fast), background-color var(--transition-fast);
  padding: 6px 14px;
  border-radius: var(--radius-sm);
}

.footer-link:hover {
  color: var(--accent-primary);
  background-color: var(--bg-tertiary);
}

.footer-bottom-info {
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-muted);
  padding-top: 24px;
  border-top: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  gap: 8px;
}

/* ==========================================================================
   Static Pages Layout & Insights Hub (about, terms, privacy, sitemap, news)
   ========================================================================== */
.page-hero {
  padding: 65px 0 45px 0;
  text-align: center;
  background-color: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  position: relative;
  overflow: hidden;
}

.page-title {
  font-size: 2.6rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 12px;
}

.page-lead {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 700px;
  margin: 0 auto;
  line-height: 1.6;
}

.page-content-wrapper {
  max-width: 900px;
  margin: 50px auto 85px auto;
  padding: 0 24px;
}

.page-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 42px 48px;
  box-shadow: var(--shadow-sm);
  backdrop-filter: blur(12px);
}

.prose h2 {
  font-size: 1.55rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-top: 38px;
  margin-bottom: 14px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border-light);
}

.prose h2:first-of-type {
  margin-top: 0;
}

.prose h3 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-top: 26px;
  margin-bottom: 10px;
}

.prose p {
  color: var(--text-secondary);
  line-height: 1.75;
  margin-bottom: 18px;
  font-size: 1rem;
}

.prose ul, .prose ol {
  color: var(--text-secondary);
  line-height: 1.75;
  padding-left: 24px;
  margin-bottom: 20px;
}

.prose li {
  margin-bottom: 8px;
}

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

.callout-box {
  padding: 22px 26px;
  border-radius: var(--radius-md);
  margin: 24px 0;
  background-color: var(--accent-gradient-subtle);
  border-left: 4px solid var(--accent-primary);
}

.callout-title {
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 6px;
}

.callout-text {
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin-bottom: 0 !important;
}

/* Insights Articles Grid for insights-k8x2.html */
.insights-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
  margin-top: 32px;
}

.insight-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 30px;
  display: flex;
  flex-direction: column;
  transition: all var(--transition-normal);
  backdrop-filter: blur(12px);
  position: relative;
}

.insight-card:hover {
  transform: translateY(-5px);
  border-color: var(--accent-primary);
  box-shadow: var(--shadow-lg);
}

.insight-tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: var(--radius-full);
  background: var(--accent-gradient-subtle);
  border: 1px solid var(--border-bismuth);
  color: var(--accent-primary);
  margin-bottom: 14px;
  align-self: flex-start;
}

.insight-card-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 12px;
  line-height: 1.4;
}

.insight-card-snippet {
  font-size: 0.93rem;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 20px;
  flex-grow: 1;
}

.insight-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 14px;
  border-top: 1px solid var(--border-light);
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* ==========================================================================
   Long-form SEO Article Layout & Components
   ========================================================================== */
.article-header {
  margin-bottom: 32px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border-light);
}

.article-breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 18px;
  flex-wrap: wrap;
}

.article-breadcrumb a:hover {
  color: var(--accent-primary);
}

.article-title {
  font-size: 2.35rem;
  font-weight: 800;
  line-height: 1.3;
  color: var(--text-primary);
  margin-bottom: 18px;
  letter-spacing: -0.02em;
}

.article-meta-bar {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 0.85rem;
  color: var(--text-muted);
  flex-wrap: wrap;
}

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

.article-layout {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 40px;
  align-items: start;
}

.article-toc-box {
  position: sticky;
  top: 96px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 22px 20px;
  box-shadow: var(--shadow-sm);
  backdrop-filter: blur(12px);
  max-height: calc(100vh - 120px);
  overflow-y: auto;
}

.article-toc-title {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 8px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border-light);
}

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

.article-toc-list a {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.45;
  transition: color var(--transition-fast);
  display: block;
  padding: 4px 0 4px 8px;
  border-left: 2px solid transparent;
}

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

.article-main-content {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 44px 48px;
  box-shadow: var(--shadow-sm);
  backdrop-filter: blur(12px);
}

.article-table-wrap {
  overflow-x: auto;
  margin: 24px 0;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
}

.article-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.92rem;
}

.article-table th {
  background: var(--bg-tertiary);
  color: var(--text-primary);
  font-weight: 700;
  padding: 14px 18px;
  border-bottom: 1px solid var(--border-color);
  white-space: nowrap;
}

.article-table td {
  padding: 12px 18px;
  border-bottom: 1px solid var(--border-light);
  color: var(--text-secondary);
}

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

.article-table tr:hover td {
  background-color: var(--bg-secondary);
}

.internal-promo-box {
  margin: 36px 0;
  padding: 28px 32px;
  border-radius: var(--radius-lg);
  background: var(--accent-gradient-subtle);
  border: 1px solid var(--border-bismuth);
  box-shadow: 0 4px 20px var(--helium-glow);
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.internal-promo-title {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--text-primary);
}

.related-posts-section {
  margin-top: 50px;
  padding-top: 36px;
  border-top: 2px solid var(--border-light);
}

.related-posts-title {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.related-posts-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.related-post-card {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 18px;
  display: flex;
  flex-direction: column;
  transition: all var(--transition-fast);
}

.related-post-card:hover {
  border-color: var(--accent-primary);
  transform: translateY(-3px);
  box-shadow: var(--shadow-sm);
}

.related-post-tag {
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--accent-primary);
  margin-bottom: 8px;
}

.related-post-name {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.45;
  margin-bottom: 10px;
  flex-grow: 1;
}

.related-post-link {
  font-size: 0.82rem;
  color: var(--accent-primary);
  font-weight: 600;
}

/* ==========================================================================
   Responsive Media Queries (@media)
   ========================================================================== */
@media (max-width: 1024px) {
  .hero-grid-layout {
    grid-template-columns: 1fr;
    gap: 40px;
    text-align: center;
  }
  .hero-content {
    text-align: center;
  }
  .hero-cta-group {
    justify-content: center;
  }
  .levitation-stage-wrap {
    order: -1;
  }
  .hero-title {
    font-size: 2.85rem;
  }
  .advantages-grid,
  .pricing-grid,
  .reviews-grid,
  .insights-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .pricing-card.featured {
    transform: none;
  }
  .pricing-card.featured:hover {
    transform: translateY(-6px);
  }
  .streaming-grid,
  .nodes-matrix-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .site-header {
    height: auto;
  }
  .nav-wrap {
    height: 66px;
  }
  
  .nav-links {
    display: none;
    position: absolute;
    top: 66px;
    left: 0;
    right: 0;
    background-color: var(--bg-glass);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    flex-direction: column;
    align-items: flex-start;
    padding: 22px 24px;
    border-bottom: 1px solid var(--border-color);
    box-shadow: var(--shadow-lg);
    gap: 16px;
  }
  
  .nav-links.active {
    display: flex;
  }
  
  .nav-link {
    font-size: 1.05rem;
    padding: 8px 0;
    width: 100%;
  }

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

  .hero-section {
    padding: 45px 0 35px 0;
  }

  .hero-title {
    font-size: 2.15rem;
    line-height: 1.22;
  }

  .hero-subtitle {
    font-size: 1.05rem;
  }

  .hero-cta-group {
    flex-direction: column;
    width: 100%;
    gap: 12px;
  }

  .hero-cta-group .btn {
    width: 100%;
    min-height: 50px;
    font-size: 1.05rem;
  }

  .hero-stats-bar {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
    padding: 18px 20px;
  }

  .advantages-grid,
  .ai-grid,
  .pricing-grid,
  .reviews-grid,
  .insights-grid {
    grid-template-columns: 1fr;
  }

  .article-layout {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .article-toc-box {
    position: static;
    margin-bottom: 24px;
  }

  .article-title {
    font-size: 1.85rem;
  }

  .article-main-content {
    padding: 26px 20px;
  }

  .related-posts-grid {
    grid-template-columns: 1fr;
  }

  .section {
    padding: 55px 0;
  }

  .section-title {
    font-size: 1.8rem;
  }

  .footer-nav-bar {
    gap: 20px;
  }

  .page-card {
    padding: 26px 20px;
  }

  .page-title {
    font-size: 1.9rem;
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: 1.8rem;
  }

  .hero-stats-bar {
    grid-template-columns: 1fr;
  }

  .streaming-grid,
  .nodes-matrix-grid {
    grid-template-columns: 1fr;
  }

  .footer-nav-bar {
    flex-direction: column;
    gap: 12px;
  }

  .footer-link {
    width: 100%;
    text-align: center;
    padding: 10px;
    background-color: var(--bg-tertiary);
  }

  .btn {
    min-height: 48px;
  }

  .site-logo {
    height: 30px;
  }
}