/* ==========================================================================
   fastlink 官方网络加速推广站 - 机械动力学滚珠导轨视觉系统
   Palette: ivory #F6F1E7, oxblood #713D43, sage #A3B39A, brass #C7A36B
   ========================================================================== */

:root {
  --color-ivory: #F6F1E7;
  --color-ivory-pure: #FFFFFF;
  --color-ivory-warm: #FAF7F2;
  --color-ivory-tint: #EFE8DA;
  --color-ivory-border: #E2D7C7;
  
  --color-oxblood: #713D43;
  --color-oxblood-dark: #4A2328;
  --color-oxblood-deep: #2F1518;
  --color-oxblood-light: #8C5259;
  --color-oxblood-subtle: rgba(113, 61, 67, 0.08);
  --color-oxblood-tint: rgba(113, 61, 67, 0.15);

  --color-sage: #A3B39A;
  --color-sage-dark: #4A5B42;
  --color-sage-deep: #323E2C;
  --color-sage-light: #EBF0E8;
  --color-sage-tint: rgba(163, 179, 154, 0.2);

  --color-brass: #C7A36B;
  --color-brass-dark: #8C6A34;
  --color-brass-deep: #5E4620;
  --color-brass-light: #E8D2A8;
  --color-brass-tint: rgba(199, 163, 107, 0.2);

  --color-text-main: #2B1D1F;
  --color-text-body: #4F4345;
  --color-text-muted: #7A6D6F;
  --color-text-light: #FAF7F2;

  --font-serif: "Songti SC", "Noto Serif CJK SC", "Source Han Serif SC", "SimSun", "STSong", "Songti", serif;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;

  --shadow-sm: 0 2px 6px rgba(47, 21, 24, 0.05);
  --shadow-md: 0 8px 24px rgba(47, 21, 24, 0.08);
  --shadow-lg: 0 16px 40px rgba(47, 21, 24, 0.12);
  --shadow-brass: 0 8px 24px rgba(199, 163, 107, 0.25);
  --shadow-oxblood: 0 8px 24px rgba(113, 61, 67, 0.22);

  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-full: 9999px;

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

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

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

body {
  font-family: var(--font-sans);
  background-color: var(--color-ivory);
  color: var(--color-text-body);
  line-height: 1.75;
  letter-spacing: 0.01em;
  overflow-x: hidden;
  position: relative;
  min-height: 100vh;
}

/* Background Subtle Kinetic Grid */
body::before {
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  background-image: 
    radial-gradient(circle at 50% 0%, rgba(199, 163, 107, 0.06) 0%, transparent 65%),
    linear-gradient(to right, rgba(113, 61, 67, 0.02) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(113, 61, 67, 0.02) 1px, transparent 1px);
  background-size: 100% 100%, 48px 48px, 48px 48px;
  z-index: -1;
}

/* Headings Typography */
h1, h2, h3, h4, .serif-heading {
  font-family: var(--font-serif);
  color: var(--color-text-main);
  line-height: 1.35;
  font-weight: 700;
  letter-spacing: -0.01em;
}

p {
  margin-bottom: 1.25rem;
}

p:last-child {
  margin-bottom: 0;
}

a {
  color: var(--color-oxblood);
  text-decoration: none;
  transition: color var(--transition-fast), border-color var(--transition-fast);
}

a:hover {
  color: var(--color-oxblood-dark);
}

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

/* Focus Visible Accessibility */
:focus-visible {
  outline: 3px solid var(--color-brass);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

/* Restrained Button Compression */
button, .btn {
  font-family: var(--font-sans);
  cursor: pointer;
  border: none;
  background: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: transform 0.1s ease-out, background-color var(--transition-fast), box-shadow var(--transition-fast), border-color var(--transition-fast);
  user-select: none;
}

button:active, .btn:active {
  transform: scale(0.97) translateY(1px);
}

/* Layout Containers */
.container {
  width: 100%;
  max-width: 1260px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.container-narrow {
  width: 100%;
  max-width: 880px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Buttons */
.btn-primary {
  background: linear-gradient(135deg, var(--color-oxblood) 0%, var(--color-oxblood-dark) 100%);
  color: var(--color-ivory-pure);
  padding: 0.85rem 1.75rem;
  font-size: 1rem;
  box-shadow: var(--shadow-oxblood);
  border: 1px solid rgba(255, 255, 255, 0.15);
}

.btn-primary:hover {
  color: var(--color-ivory-pure);
  background: linear-gradient(135deg, var(--color-oxblood-light) 0%, var(--color-oxblood) 100%);
  box-shadow: 0 10px 28px rgba(113, 61, 67, 0.32);
}

.btn-secondary {
  background-color: var(--color-ivory-warm);
  color: var(--color-oxblood);
  border: 1.5px solid var(--color-oxblood);
  padding: 0.85rem 1.65rem;
  font-size: 1rem;
}

.btn-secondary:hover {
  background-color: var(--color-oxblood-subtle);
  color: var(--color-oxblood-dark);
}

.btn-brass {
  background: linear-gradient(135deg, #DFBE85 0%, var(--color-brass) 50%, var(--color-brass-dark) 100%);
  color: #2F1E0B;
  padding: 0.85rem 1.75rem;
  font-size: 1rem;
  font-weight: 700;
  box-shadow: var(--shadow-brass);
}

.btn-brass:hover {
  filter: brightness(1.05);
}

.btn-sm {
  padding: 0.45rem 1rem;
  font-size: 0.875rem;
  border-radius: var(--radius-sm);
}

/* Section Header Badges */
.section-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.35rem 0.9rem;
  border-radius: var(--radius-full);
  font-size: 0.825rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 0.85rem;
}

.badge-oxblood {
  background-color: var(--color-oxblood-subtle);
  color: var(--color-oxblood);
  border: 1px solid var(--color-oxblood-tint);
}

.badge-sage {
  background-color: var(--color-sage-light);
  color: var(--color-sage-dark);
  border: 1px solid var(--color-sage-tint);
}

.badge-brass {
  background-color: var(--color-brass-tint);
  color: var(--color-brass-deep);
  border: 1px solid rgba(199, 163, 107, 0.3);
}

/* Section Titles */
.section-title {
  font-size: 2.25rem;
  margin-bottom: 1rem;
}

.section-desc {
  font-size: 1.075rem;
  color: var(--color-text-muted);
  max-width: 680px;
}

/* ==========================================================================
   Header & Navigation
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: rgba(246, 241, 231, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-ivory-border);
  transition: transform var(--transition-normal), background-color var(--transition-normal);
}

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

.site-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-family: var(--font-serif);
  font-size: 1.45rem;
  font-weight: 700;
  color: var(--color-oxblood);
  letter-spacing: -0.02em;
}

.logo-symbol {
  width: 38px;
  height: 38px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--color-oxblood) 0%, var(--color-oxblood-dark) 100%);
  border-radius: 9px;
  box-shadow: 0 3px 10px rgba(113, 61, 67, 0.25);
  border: 1px solid rgba(199, 163, 107, 0.4);
}

.logo-text-wrap {
  display: flex;
  flex-direction: column;
}

.logo-main {
  line-height: 1.1;
  color: var(--color-oxblood-dark);
}

.logo-sub {
  font-family: var(--font-sans);
  font-size: 0.65rem;
  letter-spacing: 0.12em;
  color: var(--color-brass-dark);
  font-weight: 700;
}

.main-nav {
  display: flex;
  align-items: center;
}

.nav-list {
  display: flex;
  align-items: center;
  list-style: none;
  gap: 1.4rem;
}

.nav-link {
  font-size: 0.925rem;
  font-weight: 500;
  color: var(--color-text-main);
  padding: 0.4rem 0.2rem;
  position: relative;
  transition: color var(--transition-fast);
}

.nav-link::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0%;
  height: 2px;
  background-color: var(--color-oxblood);
  transition: width var(--transition-fast);
}

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

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

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.85rem;
}

/* Global Motion Toggle Pill */
.motion-toggle-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background-color: var(--color-ivory-warm);
  border: 1px solid var(--color-ivory-border);
  color: var(--color-text-muted);
  font-size: 0.775rem;
  padding: 0.4rem 0.75rem;
  border-radius: var(--radius-full);
}

.motion-toggle-btn:hover {
  background-color: var(--color-ivory-pure);
  color: var(--color-oxblood);
  border-color: var(--color-brass);
}

.motion-status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: #38A169;
}

.is-paused .motion-status-dot {
  background-color: #A0AEC0;
}

/* Mobile Menu Toggle */
.mobile-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  background-color: var(--color-ivory-warm);
  border: 1px solid var(--color-ivory-border);
  padding: 9px;
  cursor: pointer;
}

.mobile-toggle span {
  display: block;
  height: 2px;
  width: 100%;
  background-color: var(--color-oxblood);
  border-radius: 2px;
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.mobile-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.mobile-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.mobile-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Mobile Navigation Overlay */
.mobile-nav-panel {
  display: none;
  position: fixed;
  top: 72px;
  left: 0;
  width: 100%;
  height: calc(100vh - 72px);
  background-color: var(--color-ivory);
  z-index: 999;
  padding: 2rem 1.5rem;
  overflow-y: auto;
  border-top: 1px solid var(--color-ivory-border);
}

.mobile-nav-panel.is-open {
  display: block;
  animation: fadeInDown 0.25s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.mobile-nav-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  margin-bottom: 2rem;
}

.mobile-nav-link {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-text-main);
  display: block;
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--color-ivory-border);
}

.mobile-nav-link:hover {
  color: var(--color-oxblood);
}

/* ==========================================================================
   Hero Section: Editorial Introduction & Tall Sculptural Marble Track
   ========================================================================== */
.hero-section {
  padding: 3.5rem 0 4.5rem;
  position: relative;
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 3.5rem;
  align-items: center;
}

.hero-editorial {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.hero-kicker {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-sans);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--color-oxblood);
  text-transform: uppercase;
  letter-spacing: 0.14em;
  margin-bottom: 1.2rem;
}

.hero-kicker::before {
  content: "";
  display: inline-block;
  width: 16px;
  height: 2px;
  background-color: var(--color-brass);
}

.hero-title {
  font-size: 3.25rem;
  line-height: 1.18;
  margin-bottom: 1.5rem;
  color: var(--color-oxblood-dark);
}

.hero-title .serif-em {
  font-style: normal;
  color: var(--color-brass-dark);
  border-bottom: 3px solid var(--color-brass-tint);
}

.hero-description {
  font-size: 1.15rem;
  line-height: 1.8;
  color: var(--color-text-body);
  margin-bottom: 2rem;
}

.hero-ctas {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  flex-wrap: wrap;
  margin-bottom: 2.25rem;
}

.hero-stats-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  padding-top: 1.75rem;
  border-top: 1px solid var(--color-ivory-border);
}

.hero-stat-item {
  display: flex;
  flex-direction: column;
}

.hero-stat-number {
  font-family: var(--font-serif);
  font-size: 1.85rem;
  font-weight: 700;
  color: var(--color-oxblood);
  line-height: 1.1;
}

.hero-stat-label {
  font-size: 0.825rem;
  color: var(--color-text-muted);
  margin-top: 0.35rem;
}

/* ==========================================================================
   Sculptural Kinetic Marble Track Component
   ========================================================================== */
.marble-track-stage {
  background-color: var(--color-ivory-pure);
  border: 1px solid var(--color-ivory-border);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  box-shadow: var(--shadow-md);
  position: relative;
  display: flex;
  flex-direction: column;
}

.track-stage-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.25rem;
  padding-bottom: 0.85rem;
  border-bottom: 1px solid var(--color-ivory-border);
}

.track-stage-title-wrap {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.track-stage-title {
  font-family: var(--font-serif);
  font-size: 1.125rem;
  color: var(--color-oxblood-dark);
  font-weight: 700;
}

.track-live-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.2rem 0.55rem;
  font-size: 0.7rem;
  font-weight: 700;
  border-radius: var(--radius-full);
  background-color: var(--color-sage-light);
  color: var(--color-sage-dark);
}

.track-live-tag::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: #38A169;
  animation: pulseLight 1.8s infinite;
}

.track-viewport {
  position: relative;
  width: 100%;
  aspect-ratio: 460 / 620;
  max-height: 600px;
  background: linear-gradient(180deg, #FDFBF8 0%, #F5EFE4 100%);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-ivory-border);
  overflow: hidden;
  box-shadow: inset 0 2px 8px rgba(0, 0, 0, 0.03);
}

.kinetic-svg {
  width: 100%;
  height: 100%;
  display: block;
}

/* Track Mechanical Switch Controls */
.track-controls-panel {
  margin-top: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.switch-routes-group {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.6rem;
}

.route-switch-btn {
  background-color: var(--color-ivory-warm);
  border: 1.5px solid var(--color-ivory-border);
  border-radius: var(--radius-sm);
  padding: 0.6rem 0.4rem;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--color-text-main);
  text-align: center;
  transition: all var(--transition-fast);
  cursor: pointer;
}

.route-switch-btn:hover {
  background-color: var(--color-ivory-pure);
  border-color: var(--color-brass);
}

.route-switch-btn[aria-pressed="true"] {
  background-color: var(--color-oxblood);
  color: var(--color-ivory-pure);
  border-color: var(--color-oxblood-dark);
  box-shadow: var(--shadow-sm);
}

.route-switch-btn[aria-pressed="true"] .route-sub {
  color: var(--color-brass-light);
}

.route-switch-btn .route-title {
  display: block;
  font-weight: 700;
  line-height: 1.2;
}

.route-switch-btn .route-sub {
  display: block;
  font-size: 0.675rem;
  color: var(--color-text-muted);
  margin-top: 2px;
}

.track-playback-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding-top: 0.75rem;
  border-top: 1px dashed var(--color-ivory-border);
}

.playback-btns-left {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.track-action-btn {
  background-color: var(--color-ivory-warm);
  border: 1px solid var(--color-ivory-border);
  color: var(--color-text-main);
  padding: 0.45rem 0.85rem;
  font-size: 0.8rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
}

.track-action-btn:hover {
  background-color: var(--color-ivory-pure);
  color: var(--color-oxblood);
  border-color: var(--color-brass);
}

.track-mechanic-note {
  font-size: 0.725rem;
  color: var(--color-text-muted);
  line-height: 1.4;
  margin-top: 0.5rem;
  text-align: center;
}

/* SVG Internal Kinetic Elements */
.track-rail-glow {
  stroke-dasharray: 8 6;
  animation: trackFlow 12s linear infinite;
}

.is-paused .track-rail-glow {
  animation-play-state: paused;
}

.junction-gear {
  transform-origin: center;
  transition: transform 0.1s linear;
}

.diverter-gate-blade {
  transform-origin: 230px 105px;
  transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.speed-gate-blade {
  transform-origin: 240px 410px;
  transition: transform 0.25s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.damper-gate-blade {
  transform-origin: 335px 235px;
  transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* ==========================================================================
   Editorial Content Sections (Wide Text-and-Diagram Layouts)
   ========================================================================== */
.editorial-section {
  padding: 5rem 0;
  border-top: 1px solid var(--color-ivory-border);
}

.editorial-section:nth-of-type(even) {
  background-color: rgba(255, 255, 255, 0.4);
}

.section-head-wrap {
  margin-bottom: 3.5rem;
}

/* Wide Diagram + Text Split Architecture */
.wide-diagram-layout {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 3.5rem;
  align-items: center;
}

.wide-diagram-layout.reverse {
  grid-template-columns: 0.85fr 1.15fr;
}

.wide-diagram-layout.reverse .diagram-visual-wrap {
  order: 2;
}

.diagram-visual-wrap {
  background-color: var(--color-ivory-pure);
  border: 1px solid var(--color-ivory-border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: var(--shadow-md);
  position: relative;
}

.diagram-editorial-prose {
  display: flex;
  flex-direction: column;
}

.diagram-editorial-prose h3 {
  font-size: 1.85rem;
  color: var(--color-oxblood-dark);
  margin-bottom: 1.25rem;
}

.feature-prose-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  margin-top: 1rem;
}

.feature-prose-item {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
}

.prose-icon-pill {
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-brass-tint);
  color: var(--color-brass-deep);
  font-weight: 700;
  font-size: 0.875rem;
  border: 1px solid rgba(199, 163, 107, 0.4);
}

.prose-content h4 {
  font-size: 1.15rem;
  margin-bottom: 0.35rem;
  color: var(--color-text-main);
}

.prose-content p {
  font-size: 0.95rem;
  color: var(--color-text-body);
}

/* Three Illustrated Advantages - Horizontal Kinetic Flow */
.advantages-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  margin-top: 2rem;
}

.advantage-card {
  background-color: var(--color-ivory-pure);
  border: 1px solid var(--color-ivory-border);
  border-radius: var(--radius-md);
  padding: 2.25rem 1.85rem;
  position: relative;
  transition: transform var(--transition-normal), box-shadow var(--transition-normal), border-color var(--transition-fast);
}

.advantage-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-brass);
}

.advantage-visual-header {
  height: 90px;
  display: flex;
  align-items: center;
  justify-content: flex-start;
  margin-bottom: 1.25rem;
}

.advantage-card h3 {
  font-size: 1.35rem;
  margin-bottom: 0.75rem;
  color: var(--color-oxblood-dark);
}

.advantage-card p {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* ==========================================================================
   Streaming & AI Ecosystem Matrix
   ========================================================================== */
.ecosystem-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
}

.ecosystem-item {
  background-color: var(--color-ivory-pure);
  border: 1px solid var(--color-ivory-border);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  transition: transform var(--transition-fast), border-color var(--transition-fast);
  display: flex;
  flex-direction: column;
}

.ecosystem-item:hover {
  transform: translateY(-3px);
  border-color: var(--color-oxblood);
  box-shadow: var(--shadow-sm);
}

.ecosystem-item-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.85rem;
}

.ecosystem-brand-title {
  font-family: var(--font-sans);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-text-main);
}

.ecosystem-tag {
  font-size: 0.725rem;
  padding: 0.2rem 0.5rem;
  border-radius: var(--radius-full);
  font-weight: 600;
}

.tag-ai {
  background-color: var(--color-sage-light);
  color: var(--color-sage-dark);
}

.tag-media {
  background-color: var(--color-oxblood-subtle);
  color: var(--color-oxblood);
}

.tag-code {
  background-color: var(--color-brass-tint);
  color: var(--color-brass-deep);
}

.ecosystem-desc {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin-bottom: 1rem;
}

.ecosystem-meta-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.75rem;
  padding-top: 0.75rem;
  border-top: 1px dashed var(--color-ivory-border);
  color: var(--color-text-muted);
}

.status-active {
  color: #2F855A;
  font-weight: 600;
}

/* ==========================================================================
   Pricing Table Section
   ========================================================================== */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 1.25rem;
  margin-top: 2rem;
}

@media (max-width: 1200px) {
  .pricing-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 820px) {
  .pricing-grid {
    grid-template-columns: 1fr;
  }
}

.pricing-card {
  background-color: var(--color-ivory-pure);
  border: 1px solid var(--color-ivory-border);
  border-radius: var(--radius-lg);
  padding: 2rem 1.4rem;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: transform var(--transition-normal), box-shadow var(--transition-normal), border-color var(--transition-fast);
}

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

.pricing-card.featured {
  background: linear-gradient(180deg, #FFFFFF 0%, #FDF8EE 100%);
  border: 2px solid var(--color-brass);
  box-shadow: var(--shadow-brass);
  transform: scale(1.03);
  z-index: 2;
}

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

.featured-ribbon {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, var(--color-brass) 0%, var(--color-brass-dark) 100%);
  color: #2D1A05;
  font-size: 0.75rem;
  font-weight: 800;
  padding: 0.3rem 1rem;
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-sm);
  white-space: nowrap;
  letter-spacing: 0.05em;
}

.pricing-tier-name {
  font-family: var(--font-serif);
  font-size: 1.35rem;
  margin-bottom: 0.5rem;
  color: var(--color-oxblood-dark);
}

.pricing-desc {
  font-size: 0.825rem;
  color: var(--color-text-muted);
  min-height: 40px;
  margin-bottom: 1.25rem;
}

.pricing-price-wrap {
  margin-bottom: 1.5rem;
  padding-bottom: 1.25rem;
  border-bottom: 1px solid var(--color-ivory-border);
}

.price-currency {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-oxblood);
}

.price-amount {
  font-family: var(--font-serif);
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--color-oxblood-dark);
  line-height: 1;
}

.price-period {
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

.pricing-features-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-bottom: 1.75rem;
  flex-grow: 1;
}

.pricing-feature-item {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.85rem;
  color: var(--color-text-body);
}

.pricing-feature-item svg {
  flex-shrink: 0;
  color: #2F855A;
}

.pricing-footnote {
  margin-top: 1.75rem;
  font-size: 0.8rem;
  color: var(--color-text-muted);
  text-align: center;
}

/* ==========================================================================
   Articles Section (Cards follow pricing: desktop 3x3 / tablet 2 / mobile 1)
   ========================================================================== */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  margin-top: 2rem;
}

@media (max-width: 992px) {
  .articles-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .articles-grid {
    grid-template-columns: 1fr;
  }
}

.article-card {
  background-color: var(--color-ivory-pure);
  border: 1px solid var(--color-ivory-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform var(--transition-normal), box-shadow var(--transition-normal), border-color var(--transition-fast);
}

.article-card:hover, .article-card:focus-within {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-oxblood);
}

.article-media-box {
  width: 100%;
  height: 190px;
  background-color: var(--color-ivory-tint);
  position: relative;
  overflow: hidden;
}

.article-media-box svg, .article-media-box img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.article-card:hover .article-media-box svg,
.article-card:focus-within .article-media-box svg {
  transform: scale(1.05);
}

.article-meta-badge {
  position: absolute;
  top: 12px;
  left: 12px;
  background-color: rgba(246, 241, 231, 0.94);
  backdrop-filter: blur(4px);
  padding: 0.25rem 0.65rem;
  border-radius: var(--radius-full);
  font-size: 0.725rem;
  font-weight: 700;
  color: var(--color-oxblood);
  border: 1px solid var(--color-ivory-border);
}

.article-body {
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.article-info-bar {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  font-size: 0.775rem;
  color: var(--color-text-muted);
  margin-bottom: 0.65rem;
}

.article-title {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  line-height: 1.4;
  margin-bottom: 0.75rem;
}

.article-title a {
  color: var(--color-text-main);
}

.article-title a:hover {
  color: var(--color-oxblood);
}

.article-excerpt {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  line-height: 1.65;
  margin-bottom: 1.25rem;
  flex-grow: 1;
}

.article-read-more {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-oxblood);
  margin-top: auto;
}

.article-read-more:hover {
  text-decoration: underline;
}

/* ==========================================================================
   Review Cards Section
   ========================================================================== */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.75rem;
  margin-top: 2rem;
}

.review-card {
  background-color: var(--color-ivory-pure);
  border: 1px solid var(--color-ivory-border);
  border-radius: var(--radius-md);
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  position: relative;
  box-shadow: var(--shadow-sm);
}

.review-demo-label {
  display: inline-block;
  align-self: flex-start;
  font-size: 0.7rem;
  padding: 0.15rem 0.5rem;
  background-color: var(--color-ivory-tint);
  color: var(--color-text-muted);
  border-radius: var(--radius-sm);
  margin-bottom: 1rem;
}

.review-stars {
  color: #D69E2E;
  margin-bottom: 0.85rem;
}

.review-text {
  font-style: italic;
  font-size: 0.95rem;
  line-height: 1.7;
  color: var(--color-text-body);
  margin-bottom: 1.25rem;
  flex-grow: 1;
}

.review-author {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding-top: 1rem;
  border-top: 1px solid var(--color-ivory-border);
}

.review-avatar {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background-color: var(--color-oxblood-subtle);
  color: var(--color-oxblood);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1rem;
}

.author-name {
  font-weight: 700;
  font-size: 0.925rem;
  color: var(--color-text-main);
}

.author-role {
  font-size: 0.75rem;
  color: var(--color-text-muted);
}

/* ==========================================================================
   Accordion FAQ Section
   ========================================================================== */
.faq-accordion {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  max-width: 860px;
  margin: 2rem auto 0;
}

.faq-item {
  background-color: var(--color-ivory-pure);
  border: 1px solid var(--color-ivory-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color var(--transition-fast);
}

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

.faq-header {
  width: 100%;
  text-align: left;
  padding: 1.25rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  font-family: var(--font-serif);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-text-main);
  background: none;
  cursor: pointer;
}

.faq-chevron {
  width: 22px;
  height: 22px;
  flex-shrink: 0;
  color: var(--color-oxblood);
  transition: transform var(--transition-normal);
}

.faq-item[open] .faq-chevron,
.faq-header[aria-expanded="true"] .faq-chevron {
  transform: rotate(180deg);
}

.faq-content {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows var(--transition-normal);
}

.faq-item.is-active .faq-content {
  grid-template-rows: 1fr;
}

.faq-body {
  overflow: hidden;
  padding: 0 1.5rem;
  color: var(--color-text-body);
  font-size: 0.95rem;
  line-height: 1.75;
}

.faq-item.is-active .faq-body {
  padding-bottom: 1.35rem;
}

/* ==========================================================================
   Site Footer (Editorial Aesthetic, PBN Matrix & Identity)
   ========================================================================== */
.site-footer {
  background-color: #241618;
  color: #B5A7A9;
  padding: 4.5rem 0 2.5rem;
  border-top: 3px solid var(--color-brass);
  font-size: 0.9rem;
}

.footer-top-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
  gap: 3rem;
  margin-bottom: 3.5rem;
}

.footer-brand h4 {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  color: var(--color-ivory);
  margin-bottom: 0.85rem;
}

.footer-brand p {
  color: #A09193;
  font-size: 0.875rem;
  line-height: 1.7;
  max-width: 340px;
}

.footer-nav-col h5 {
  font-family: var(--font-serif);
  font-size: 1.05rem;
  color: var(--color-ivory);
  margin-bottom: 1.2rem;
  position: relative;
  display: inline-block;
}

.footer-nav-col h5::after {
  content: "";
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 24px;
  height: 2px;
  background-color: var(--color-brass);
}

.footer-links-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.footer-links-list a {
  color: #A09193;
  transition: color var(--transition-fast);
}

.footer-links-list a:hover {
  color: var(--color-brass-light);
}

/* PBN Matrix Links Row */
.footer-pbn-bar {
  padding: 1.75rem 0;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  margin-bottom: 2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 1.75rem;
  font-size: 0.875rem;
}

.pbn-label {
  color: #8C7C7E;
  font-weight: 600;
}

.pbn-link {
  color: var(--color-brass-light);
  font-weight: 600;
  position: relative;
  transition: color var(--transition-fast);
}

.pbn-link:hover {
  color: #FFFFFF;
  text-decoration: underline;
}

.footer-bottom-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1.25rem;
  font-size: 0.8rem;
  color: #7D6E70;
}

.footer-disclaimer {
  max-width: 600px;
  line-height: 1.5;
}

/* ==========================================================================
   Article Detail & Static Page Content Styles
   ========================================================================== */
.page-header {
  padding: 3rem 0 2rem;
  background-color: var(--color-ivory-warm);
  border-bottom: 1px solid var(--color-ivory-border);
  margin-bottom: 3rem;
}

.breadcrumb-nav {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-bottom: 1rem;
}

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

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

.breadcrumb-separator {
  color: var(--color-brass);
}

.article-header-meta {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-top: 1rem;
}

.editorial-article-content {
  font-size: 1.05rem;
  line-height: 1.85;
  color: #382C2E;
}

.editorial-article-content h2 {
  font-size: 1.85rem;
  margin: 2.5rem 0 1rem;
  color: var(--color-oxblood-dark);
  border-left: 4px solid var(--color-oxblood);
  padding-left: 0.85rem;
}

.editorial-article-content h3 {
  font-size: 1.35rem;
  margin: 1.75rem 0 0.75rem;
  color: var(--color-text-main);
}

.editorial-article-content ul, 
.editorial-article-content ol {
  margin: 1rem 0 1.5rem 1.75rem;
}

.editorial-article-content li {
  margin-bottom: 0.5rem;
}

.editorial-callout {
  background-color: var(--color-ivory-warm);
  border-left: 4px solid var(--color-brass);
  padding: 1.25rem 1.5rem;
  margin: 2rem 0;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.related-articles-box {
  background-color: var(--color-ivory-pure);
  border: 1px solid var(--color-ivory-border);
  border-radius: var(--radius-md);
  padding: 1.75rem;
  margin-top: 3.5rem;
}

.related-articles-box h4 {
  font-size: 1.25rem;
  margin-bottom: 1rem;
  color: var(--color-oxblood-dark);
}

/* ==========================================================================
   Section Entry Animations
   ========================================================================== */
.animate-on-scroll {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s cubic-bezier(0.16, 1, 0.3, 1), transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.animate-on-scroll.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ==========================================================================
   Reduced Motion Accessibility Override
   ========================================================================== */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }

  .animate-on-scroll {
    opacity: 1 !important;
    transform: none !important;
  }

  .track-rail-glow {
    animation: none !important;
  }
}

/* Manual Paused State */
[data-animation-paused="true"] .track-rail-glow {
  animation-play-state: paused;
}

/* Keyframe Animations */
@keyframes fadeInDown {
  from {
    opacity: 0;
    transform: translateY(-8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes pulseLight {
  0%, 100% {
    opacity: 1;
    transform: scale(1);
  }
  50% {
    opacity: 0.4;
    transform: scale(0.85);
  }
}

@keyframes trackFlow {
  from {
    stroke-dashoffset: 0;
  }
  to {
    stroke-dashoffset: 140;
  }
}

/* Responsive Breakpoints Testing (375, 390, 430, 768, 1024, 1440) */
@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 3rem;
  }

  .hero-editorial {
    order: 1;
  }

  .marble-track-stage {
    order: 2;
    max-width: 580px;
    margin: 0 auto;
    width: 100%;
  }

  .wide-diagram-layout,
  .wide-diagram-layout.reverse {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

  .wide-diagram-layout.reverse .diagram-visual-wrap {
    order: 1;
  }

  .footer-top-grid {
    grid-template-columns: 1fr 1fr;
    gap: 2.5rem;
  }
}

@media (max-width: 768px) {
  .main-nav {
    display: none;
  }

  .mobile-toggle {
    display: flex;
  }

  .hero-title {
    font-size: 2.45rem;
  }

  .hero-stats-row {
    grid-template-columns: repeat(3, 1fr);
    gap: 0.75rem;
  }

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

  .footer-top-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .footer-bottom-bar {
    flex-direction: column;
    text-align: center;
  }
}

@media (max-width: 430px) {
  .hero-title {
    font-size: 2rem;
  }

  .hero-stats-row {
    grid-template-columns: 1fr;
    gap: 1rem;
  }

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

  .hero-ctas .btn {
    width: 100%;
  }

  .switch-routes-group {
    grid-template-columns: 1fr;
  }

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