/* ===================================================================
   Fastlink Official CSS Design System
   Superconducting Magnetic Link-Lock Architecture
   Palette: Deep Obsidian Void (#07080b), Electric Photon Cyan (#00f0ff), Dynamic Plasma Violet (#7928ca)
   Zero External Dependencies - 60FPS Micro-interactions - Ultra-Fast
   =================================================================== */

:root {
  /* Default: Daytime Superconducting Lab Palette */
  --bg-primary: #F8FAFC;
  --bg-secondary: #FFFFFF;
  --bg-tertiary: #F1F5F9;
  --bg-card: #FFFFFF;
  --bg-card-hover: #F8FAFD;
  --bg-card-subtle: #F1F5F9;
  
  --text-primary: #07080B;
  --text-secondary: #334155;
  --text-muted: #64748B;
  
  --border-color: #E2E8F0;
  --border-subtle: #EDF2F7;
  --border-highlight: #0284C7;
  --border-glow: rgba(0, 240, 255, 0.4);
  
  --primary: #0284C7;
  --primary-hover: #0369A1;
  --primary-light: #F0F9FF;
  --primary-border: #BAE6FD;
  
  --photon-cyan: #00F0FF;
  --plasma-violet: #7928CA;
  --plasma-violet-light: rgba(121, 40, 202, 0.08);
  --accent-emerald: #059669;
  --accent-amber: #D97706;
  
  --gradient-plasma: linear-gradient(135deg, #0284C7 0%, #7928CA 100%);
  --gradient-glow: linear-gradient(90deg, #00F0FF 0%, #7928CA 100%);
  --gradient-subtle: linear-gradient(180deg, rgba(2, 132, 199, 0.05) 0%, rgba(248, 250, 252, 0) 100%);
  --gradient-badge: linear-gradient(135deg, rgba(2, 132, 199, 0.1) 0%, rgba(121, 40, 202, 0.1) 100%);

  --shadow-sm: 0 1px 2px 0 rgba(7, 8, 11, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(7, 8, 11, 0.07), 0 2px 4px -1px rgba(7, 8, 11, 0.04);
  --shadow-lg: 0 10px 20px -3px rgba(7, 8, 11, 0.08), 0 4px 6px -2px rgba(7, 8, 11, 0.03);
  --shadow-cyan-glow: 0 0 20px rgba(2, 132, 199, 0.2);
  --shadow-plasma: 0 0 25px rgba(121, 40, 202, 0.2);
  
  --nav-bg: rgba(255, 255, 255, 0.88);
  --theme-btn-bg: rgba(241, 245, 249, 0.85);
  --theme-btn-border: #CBD5E1;

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --radius-full: 9999px;
  
  --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="dark"] {
  /* Deep Obsidian Void + Electric Cyan & Plasma Violet */
  --bg-primary: #07080B;
  --bg-secondary: #0B0E14;
  --bg-tertiary: #10141F;
  --bg-card: rgba(13, 17, 26, 0.92);
  --bg-card-hover: rgba(18, 24, 38, 0.98);
  --bg-card-subtle: #0F131D;
  
  --text-primary: #F0F6FC;
  --text-secondary: #94A3B8;
  --text-muted: #64748B;
  
  --border-color: rgba(255, 255, 255, 0.08);
  --border-subtle: rgba(255, 255, 255, 0.05);
  --border-highlight: #00F0FF;
  --border-glow: rgba(0, 240, 255, 0.5);
  
  --primary: #00F0FF;
  --primary-hover: #38BDF8;
  --primary-light: rgba(0, 240, 255, 0.12);
  --primary-border: rgba(0, 240, 255, 0.35);
  
  --photon-cyan: #00F0FF;
  --plasma-violet: #7928CA;
  --plasma-violet-light: rgba(121, 40, 202, 0.2);
  --accent-emerald: #10B981;
  --accent-amber: #F59E0B;
  
  --gradient-plasma: linear-gradient(135deg, #00F0FF 0%, #7928CA 100%);
  --gradient-glow: linear-gradient(90deg, #00F0FF 0%, #7928CA 100%);
  --gradient-subtle: linear-gradient(180deg, rgba(0, 240, 255, 0.06) 0%, rgba(7, 8, 11, 0) 100%);
  --gradient-badge: linear-gradient(135deg, rgba(0, 240, 255, 0.12) 0%, rgba(121, 40, 202, 0.18) 100%);

  --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.6);
  --shadow-md: 0 4px 8px -1px rgba(0, 0, 0, 0.7);
  --shadow-lg: 0 12px 24px -4px rgba(0, 0, 0, 0.85);
  --shadow-cyan-glow: 0 0 28px rgba(0, 240, 255, 0.35);
  --shadow-plasma: 0 0 32px rgba(121, 40, 202, 0.4);
  
  --nav-bg: rgba(7, 8, 11, 0.88);
  --theme-btn-bg: rgba(16, 20, 31, 0.8);
  --theme-btn-border: rgba(0, 240, 255, 0.25);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px; /* Offset for sticky header transition */
  font-size: 16px;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  transition: background-color 0.35s ease, color 0.35s ease;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* Subtle magnetic grid backdrop */
body::before {
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
  opacity: 0.35;
  background-image: 
    radial-gradient(rgba(0, 240, 255, 0.08) 1px, transparent 1px),
    radial-gradient(rgba(121, 40, 202, 0.06) 1px, transparent 1px);
  background-size: 36px 36px;
  background-position: 0 0, 18px 18px;
}

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

/* Layout Utilities */
.container {
  width: 100%;
  max-width: 1240px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
  position: relative;
  z-index: 1;
}

.section {
  padding: 90px 0;
  position: relative;
  z-index: 1;
}

.section-title-wrap {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 56px auto;
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  border-radius: var(--radius-full);
  background: var(--gradient-badge);
  color: var(--primary);
  font-size: 0.85rem;
  font-weight: 700;
  margin-bottom: 16px;
  border: 1px solid var(--primary-border);
  letter-spacing: 1px;
  text-transform: uppercase;
  white-space: nowrap;
}

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

.section-title {
  font-size: 2.35rem;
  font-weight: 800;
  line-height: 1.25;
  color: var(--text-primary);
  margin-bottom: 18px;
  letter-spacing: -0.02em;
}

.section-desc {
  font-size: 1.1rem;
  color: var(--text-secondary);
  line-height: 1.65;
}

/* Gradient Text */
.gradient-text {
  background: var(--gradient-plasma);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.gradient-cyan {
  background: linear-gradient(135deg, #00F0FF 0%, #38BDF8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* ===================================================================
   Header & Navigation
   =================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--nav-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-color);
  transition: background-color 0.35s ease, border-color 0.35s ease;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 74px;
}

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

/* Auto-spinning Rocket Logo */
.brand-logo-img {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  object-fit: cover;
  display: block;
  transform-origin: center center;
  animation: logo-spin 10s linear infinite;
  box-shadow: 0 0 12px rgba(0, 240, 255, 0.3);
  transition: box-shadow 0.3s ease;
}

.brand-logo:hover .brand-logo-img {
  animation-duration: 3.5s;
  box-shadow: 0 0 20px rgba(0, 240, 255, 0.6);
}

@keyframes logo-spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

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

.nav-item a {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-secondary);
  padding: 6px 4px;
  position: relative;
  transition: color 0.2s ease;
}

.nav-item a::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-plasma);
  transition: width 0.25s ease;
  border-radius: 2px;
}

.nav-item a:hover {
  color: var(--primary);
}

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

/* Special badge on '推荐资讯' */
.nav-badge {
  font-size: 0.7rem;
  padding: 2px 6px;
  border-radius: var(--radius-full);
  background: var(--gradient-plasma);
  color: #FFFFFF;
  margin-left: 4px;
  font-weight: 700;
  letter-spacing: 0.5px;
}

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

/* Refined Glassmorphism Theme Switch */
.theme-toggle-btn {
  background: var(--theme-btn-bg);
  border: 1px solid var(--theme-btn-border);
  color: var(--text-secondary);
  width: 42px;
  height: 42px;
  border-radius: var(--radius-full);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition);
  outline: none;
  padding: 0;
  backdrop-filter: blur(8px);
}

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

.theme-toggle-btn svg {
  width: 20px;
  height: 20px;
}

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

/* Action Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 0.95rem;
  font-weight: 600;
  padding: 10px 22px;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: var(--transition);
  text-align: center;
  white-space: nowrap;
  border: 1px solid transparent;
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: var(--gradient-plasma);
  color: #FFFFFF;
  box-shadow: 0 4px 18px rgba(0, 240, 255, 0.25);
}

.btn-primary:hover {
  box-shadow: 0 6px 24px rgba(121, 40, 202, 0.45);
  transform: translateY(-2px);
  color: #FFFFFF;
}

.btn-secondary {
  background: var(--bg-tertiary);
  color: var(--text-primary);
  border-color: var(--border-color);
}

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

.btn-lg {
  padding: 14px 34px;
  font-size: 1.05rem;
  border-radius: var(--radius-md);
}

.btn-block {
  width: 100%;
}

/* ===================================================================
   Superconducting Magnetic Link-Lock Hero Section
   =================================================================== */
.hero-section {
  padding: 70px 0 60px 0;
  background: var(--gradient-subtle);
  position: relative;
  overflow: hidden;
}

.hero-layout {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  align-items: center;
  gap: 40px;
}

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

.hero-badge-pill {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 6px 18px;
  border-radius: var(--radius-full);
  background: var(--gradient-badge);
  border: 1px solid var(--primary-border);
  color: var(--primary);
  font-size: 0.875rem;
  font-weight: 700;
  margin-bottom: 22px;
  white-space: nowrap;
}

.hero-badge-pill .pulse-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--photon-cyan);
  box-shadow: 0 0 10px var(--photon-cyan);
  animation: pulse-cyan 2s infinite;
}

@keyframes pulse-cyan {
  0% { transform: scale(0.9); box-shadow: 0 0 0 0 rgba(0, 240, 255, 0.7); }
  70% { transform: scale(1); box-shadow: 0 0 0 8px rgba(0, 240, 255, 0); }
  100% { transform: scale(0.9); box-shadow: 0 0 0 0 rgba(0, 240, 255, 0); }
}

.hero-title {
  font-size: 3.4rem;
  font-weight: 900;
  line-height: 1.18;
  letter-spacing: -0.03em;
  margin-bottom: 20px;
}

.hero-subtitle {
  font-size: 1.2rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 34px;
}

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

/* 3D Interlocking Dual-Ring Magnetic Stage */
.magnetic-lock-stage {
  position: relative;
  width: 100%;
  height: 440px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: radial-gradient(circle at center, rgba(0, 240, 255, 0.08) 0%, rgba(121, 40, 202, 0.05) 50%, transparent 70%);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
  box-shadow: inset 0 0 40px rgba(0, 240, 255, 0.04);
  cursor: crosshair;
  overflow: hidden;
}

#superconductingCanvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: block;
}

.stage-tip {
  position: absolute;
  bottom: 14px;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-muted);
  background: var(--bg-card);
  padding: 4px 12px;
  border-radius: var(--radius-full);
  border: 1px solid var(--border-subtle);
  pointer-events: none;
  letter-spacing: 0.5px;
}

/* Hero Metrics Bar */
.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-top: 48px;
  padding: 24px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
}

.stat-item {
  text-align: center;
  position: relative;
}

.stat-item:not(:last-child)::after {
  content: "";
  position: absolute;
  right: -10px;
  top: 20%;
  height: 60%;
  width: 1px;
  background: var(--border-subtle);
}

.stat-value {
  font-size: 2rem;
  font-weight: 800;
  color: var(--primary);
  line-height: 1.2;
}

.stat-label {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 4px;
}

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

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  transition: var(--transition);
  position: relative;
  display: flex;
  flex-direction: column;
}

.feature-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-highlight);
  box-shadow: var(--shadow-cyan-glow);
}

.feature-icon-box {
  width: 58px;
  height: 58px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
  background: var(--primary-light);
  color: var(--primary);
  border: 1px solid var(--primary-border);
}

.feature-icon-box.violet {
  background: var(--plasma-violet-light);
  color: var(--plasma-violet);
  border-color: rgba(121, 40, 202, 0.3);
}

.feature-icon-box.emerald {
  background: rgba(16, 185, 129, 0.1);
  color: var(--accent-emerald);
  border-color: rgba(16, 185, 129, 0.3);
}

.feature-title {
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.feature-desc {
  font-size: 0.975rem;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 20px;
  flex-grow: 1;
}

.feature-list {
  list-style: none;
  border-top: 1px solid var(--border-subtle);
  padding-top: 16px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.feature-list-item {
  font-size: 0.875rem;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 8px;
}

.feature-list-item svg {
  color: var(--accent-emerald);
  flex-shrink: 0;
}

/* ===================================================================
   Showcase Sections: Streaming & AI
   Strict: Absolutely NO AI chatbot heads or spark icons
   =================================================================== */
.showcase-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}

.showcase-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 38px 32px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.showcase-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-glow);
}

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

.showcase-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  padding: 4px 12px;
  border-radius: var(--radius-full);
  margin-bottom: 14px;
  white-space: nowrap;
}

.showcase-badge.cyan {
  background: rgba(0, 240, 255, 0.12);
  color: var(--primary);
  border: 1px solid rgba(0, 240, 255, 0.3);
}

.showcase-badge.violet {
  background: rgba(121, 40, 202, 0.12);
  color: var(--plasma-violet);
  border: 1px solid rgba(121, 40, 202, 0.3);
}

.showcase-title {
  font-size: 1.65rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 12px;
}

.showcase-desc {
  font-size: 0.975rem;
  color: var(--text-secondary);
  line-height: 1.65;
}

.showcase-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 24px 0;
}

.tag-item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-primary);
  transition: var(--transition);
}

.tag-item:hover {
  background: var(--bg-secondary);
  border-color: var(--primary);
  color: var(--primary);
}

.showcase-footer {
  padding-top: 20px;
  border-top: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.showcase-highlight {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--accent-emerald);
  display: flex;
  align-items: center;
  gap: 6px;
}

/* ===================================================================
   Linked Modular Capsule Pricing Table
   Electromagnetic Plasma Discharge on Joints
   =================================================================== */
.capsule-wrapper {
  position: relative;
  margin-top: 20px;
}

.capsule-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  position: relative;
}

/* Inter-capsule Magnetic Joints */
.capsule-grid::before {
  content: "";
  position: absolute;
  top: 50%;
  left: 5%;
  right: 5%;
  height: 2px;
  background: linear-gradient(90deg, 
    transparent 0%, 
    rgba(0, 240, 255, 0.2) 20%, 
    rgba(121, 40, 202, 0.4) 50%, 
    rgba(0, 240, 255, 0.2) 80%, 
    transparent 100%);
  pointer-events: none;
  z-index: 0;
}

.pricing-capsule {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 40px 28px;
  display: flex;
  flex-direction: column;
  transition: var(--transition);
  position: relative;
  z-index: 1;
}

/* Electromagnetic Joint Node on Capsule */
.pricing-capsule::after {
  content: "";
  position: absolute;
  top: -6px;
  left: 50%;
  transform: translateX(-50%);
  width: 48px;
  height: 4px;
  border-radius: var(--radius-full);
  background: var(--border-color);
  transition: var(--transition);
}

.pricing-capsule:hover::after {
  background: var(--gradient-glow);
  box-shadow: 0 0 12px var(--photon-cyan);
}

.pricing-capsule.featured {
  border-color: var(--primary);
  box-shadow: 0 8px 30px rgba(0, 240, 255, 0.18);
  transform: scale(1.03);
  z-index: 2;
}

.pricing-capsule.featured::after {
  display: none !important; /* Hide joint bar so it doesn't overlap or obstruct the featured badge */
}

.pricing-capsule:hover {
  transform: translateY(-8px);
  border-color: var(--border-highlight);
  box-shadow: var(--shadow-cyan-glow), var(--shadow-plasma);
}

.pricing-capsule.featured:hover {
  transform: scale(1.03) translateY(-8px);
}

.pricing-badge {
  position: absolute;
  top: -15px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--gradient-plasma);
  color: #FFFFFF;
  font-size: 0.825rem;
  font-weight: 700;
  padding: 6px 20px;
  border-radius: var(--radius-full);
  box-shadow: 0 4px 16px rgba(0, 240, 255, 0.45);
  letter-spacing: 0.5px;
  white-space: nowrap;
  word-break: keep-all;
  z-index: 10;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  line-height: 1.2;
  border: 1px solid rgba(255, 255, 255, 0.25);
  pointer-events: none;
}

.pricing-header {
  text-align: center;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border-subtle);
  margin-bottom: 24px;
}

.pricing-plan-name {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.pricing-plan-desc {
  font-size: 0.875rem;
  color: var(--text-muted);
  min-height: 42px;
}

.pricing-price-wrap {
  margin: 18px 0 6px 0;
  display: flex;
  align-items: baseline;
  justify-content: center;
}

.price-currency {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
}

.price-amount {
  font-size: 3.2rem;
  font-weight: 900;
  line-height: 1;
  color: var(--text-primary);
  letter-spacing: -0.03em;
}

.price-period {
  font-size: 0.95rem;
  color: var(--text-muted);
  margin-left: 4px;
}

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

.pricing-feature-item {
  font-size: 0.925rem;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 10px;
}

.pricing-feature-item svg {
  color: var(--accent-emerald);
  flex-shrink: 0;
  width: 18px;
  height: 18px;
}

.pricing-feature-item.disabled {
  color: var(--text-muted);
  text-decoration: line-through;
  opacity: 0.65;
}

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

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

.review-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: var(--transition);
}

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

.review-stars {
  color: #F59E0B;
  display: flex;
  gap: 3px;
  margin-bottom: 16px;
  font-size: 1.1rem;
}

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

.review-author {
  display: flex;
  align-items: center;
  gap: 14px;
  border-top: 1px solid var(--border-subtle);
  padding-top: 18px;
}

.author-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--gradient-plasma);
  color: #FFFFFF;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  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 Accordion
   =================================================================== */
.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: var(--transition);
}

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

.faq-item summary {
  padding: 20px 24px;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  user-select: none;
  transition: var(--transition);
}

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

.faq-icon {
  width: 20px;
  height: 20px;
  transition: transform 0.3s ease;
  color: var(--text-muted);
}

.faq-item[open] summary .faq-icon {
  transform: rotate(180deg);
  color: var(--primary);
}

.faq-item[open] summary {
  color: var(--primary);
  border-bottom: 1px solid var(--border-subtle);
}

.faq-content {
  padding: 20px 24px;
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.7;
  background: var(--bg-card-subtle);
}

/* ===================================================================
   Footer Section
   Strict: Only retain the four requested headings/links
   =================================================================== */
.site-footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: 48px 0 36px 0;
  margin-top: auto;
  transition: background-color 0.35s ease, border-color 0.35s ease;
}

.footer-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 48px;
  flex-wrap: wrap;
  margin-bottom: 24px;
  list-style: none;
}

.footer-nav a {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-secondary);
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  transition: var(--transition);
}

.footer-nav a:hover {
  color: var(--primary);
  background: var(--primary-light);
}

.footer-bottom {
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-muted);
  border-top: 1px solid var(--border-subtle);
  padding-top: 24px;
}

/* ===================================================================
   Articles & Insights Subpage Styling
   =================================================================== */
.subpage-hero {
  padding: 64px 0 44px 0;
  background: var(--gradient-subtle);
  border-bottom: 1px solid var(--border-color);
  text-align: center;
}

.subpage-title {
  font-size: 2.6rem;
  font-weight: 800;
  margin-bottom: 14px;
}

.subpage-desc {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 650px;
  margin: 0 auto;
}

.subpage-content {
  padding: 64px 0;
}

.article-box {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 48px;
  box-shadow: var(--shadow-sm);
}

.article-section {
  margin-bottom: 40px;
}

.article-section:last-child {
  margin-bottom: 0;
}

.article-section h2 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 10px;
  border-bottom: 2px solid var(--border-subtle);
  padding-bottom: 8px;
}

.article-section h2 svg {
  color: var(--primary);
  width: 24px;
  height: 24px;
}

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

.article-section ul, .article-section ol {
  padding-left: 24px;
  margin-bottom: 16px;
  color: var(--text-secondary);
  line-height: 1.8;
}

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

.article-highlight-box {
  padding: 20px 24px;
  background: var(--primary-light);
  border: 1px solid var(--primary-border);
  border-radius: var(--radius-md);
  margin: 20px 0;
}

.article-highlight-box h3 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 8px;
}

.article-highlight-box p {
  margin-bottom: 0;
  color: var(--text-primary);
}

/* Insights News Feed Cards */
.news-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}

.news-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

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

.news-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 12px;
}

.news-category {
  padding: 2px 10px;
  border-radius: var(--radius-full);
  background: var(--primary-light);
  color: var(--primary);
  font-weight: 700;
}

.news-card h3 {
  font-size: 1.3rem;
  font-weight: 800;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.news-card p {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 20px;
}

.news-link {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

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

/* Node Grid inside About page */
.node-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 16px;
  margin-top: 20px;
}

.node-item {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.node-info-flag {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  font-size: 0.95rem;
}

.node-badge {
  font-size: 0.75rem;
  padding: 2px 8px;
  border-radius: var(--radius-full);
  background: rgba(0, 240, 255, 0.12);
  color: var(--primary);
  font-weight: 600;
}

/* Sitemap Links */
.sitemap-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.sitemap-card {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
}

.sitemap-card h3 {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--primary);
  display: flex;
  align-items: center;
  gap: 8px;
}

.sitemap-card ul {
  list-style: none;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.sitemap-card li a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.sitemap-card li a:hover {
  color: var(--primary);
  text-decoration: underline;
}

/* ===================================================================
   Responsive Media Queries (@media)
   =================================================================== */
@media (max-width: 1024px) {
  .hero-layout {
    grid-template-columns: 1fr;
    gap: 36px;
  }
  .magnetic-lock-stage {
    height: 380px;
  }
  .features-grid, .capsule-grid, .reviews-grid, .news-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .pricing-capsule.featured {
    transform: none;
  }
  .pricing-capsule.featured:hover {
    transform: translateY(-8px);
  }
  .capsule-grid::before {
    display: none;
  }
}

@media (max-width: 768px) {
  .section {
    padding: 60px 0;
  }
  .section-title {
    font-size: 1.85rem;
  }
  .hero-section {
    padding: 40px 0 50px 0;
  }
  .hero-title {
    font-size: 2.2rem;
  }
  .hero-subtitle {
    font-size: 1.05rem;
  }
  .magnetic-lock-stage {
    height: 300px;
  }
  .hero-stats {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
    padding: 16px;
    margin-top: 32px;
  }
  .stat-item:not(:last-child)::after {
    display: none;
  }
  .stat-value {
    font-size: 1.6rem;
  }
  .features-grid, .capsule-grid, .reviews-grid, .showcase-grid, .sitemap-grid, .news-grid {
    grid-template-columns: 1fr;
  }
  .header-inner {
    height: 66px;
  }
  .nav-links {
    display: none; /* Collapsed for clean mobile layout */
  }
  .hero-cta-group {
    flex-direction: column;
    width: 100%;
  }
  .hero-cta-group .btn {
    width: 100%;
  }
  .footer-nav {
    flex-direction: column;
    gap: 16px;
  }
  .article-box {
    padding: 24px 18px;
  }
  .related-grid {
    grid-template-columns: 1fr;
  }
}

/* ===================================================================
   SEO Long-form Article Styles
   =================================================================== */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 24px;
  flex-wrap: wrap;
}

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

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

.breadcrumb span.sep {
  opacity: 0.4;
}

.article-post {
  max-width: 900px;
  margin: 0 auto;
}

.article-post-header {
  margin-bottom: 36px;
  border-bottom: 1px solid var(--border-subtle);
  padding-bottom: 24px;
}

.article-post-header h1 {
  font-size: 2.3rem;
  font-weight: 800;
  line-height: 1.3;
  color: var(--text-primary);
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}

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

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

/* Table of Contents (TOC) */
.toc-box {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px 28px;
  margin: 32px 0 40px 0;
  border-left: 4px solid var(--primary);
}

.toc-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.toc-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

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

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

.toc-number {
  font-weight: 700;
  color: var(--primary);
  font-size: 0.85rem;
}

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

.article-content h2 {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--text-primary);
  margin: 48px 0 20px 0;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  gap: 10px;
}

.article-content h3 {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: 32px 0 14px 0;
}

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

.article-content ul, .article-content ol {
  padding-left: 28px;
  margin-bottom: 24px;
}

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

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

/* In-Article Benchmark Data Table */
.article-data-table {
  width: 100%;
  border-collapse: collapse;
  margin: 28px 0;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow-x: auto;
  display: block;
  font-size: 0.95rem;
}

.article-data-table th, .article-data-table td {
  padding: 14px 18px;
  text-align: left;
  border-bottom: 1px solid var(--border-subtle);
  white-space: nowrap;
}

.article-data-table th {
  background: var(--bg-tertiary);
  font-weight: 700;
  color: var(--text-primary);
}

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

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

/* In-Article Promotion Callout Box */
.article-cta-box {
  background: var(--gradient-subtle);
  border: 1px solid var(--primary-border);
  border-radius: var(--radius-lg);
  padding: 36px 32px;
  margin: 44px 0;
  text-align: center;
  box-shadow: var(--shadow-cyan-glow);
}

.article-cta-box h3 {
  font-size: 1.45rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 12px;
}

.article-cta-box p {
  font-size: 1rem;
  color: var(--text-secondary);
  max-width: 620px;
  margin: 0 auto 24px auto;
}

/* Related Reading Section */
.related-posts-section {
  margin-top: 60px;
  padding-top: 36px;
  border-top: 1px solid var(--border-color);
}

.related-posts-title {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 24px;
}

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

.related-card {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 20px;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.related-card:hover {
  border-color: var(--primary);
  transform: translateY(-3px);
}

.related-card h4 {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 8px;
  line-height: 1.4;
}

.related-card p {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 12px;
}

.related-card .read-link {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--primary);
}