/* ========== Below-Fold Section Styles ========== */
/* These styles are loaded asynchronously for better initial page load */

/* ========== Philosophy Section ========== */
.philosophy {
  background: linear-gradient(180deg, var(--color-surface) 0%, var(--color-bg) 100%);
  position: relative;
}

.philosophy::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(
    90deg,
    transparent 0%,
    var(--color-border-strong) 50%,
    transparent 100%
  );
}

.section-label {
  font-family: var(--font-mono);
  font-size: var(--text-label-sm);
  color: var(--color-text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.2em;
  text-align: center;
  margin-bottom: var(--space-4);
}

.philosophy-headline {
  font-size: clamp(var(--text-headline-lg), 5vw, var(--text-display-md));
  font-weight: 700;
  text-align: center;
  margin-bottom: var(--space-3);
  letter-spacing: -0.02em;
}

.philosophy-subhead {
  font-size: var(--text-body-lg);
  color: var(--color-text-secondary);
  text-align: center;
  margin-bottom: var(--space-10);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

/* Text Reveal with Clip-path Animation */
.text-reveal {
  clip-path: inset(100% 0 0 0);
  opacity: 0;
  transform: translateY(20px);
  transition:
    clip-path var(--duration-long-2) var(--easing-emphasized-decelerate),
    opacity var(--duration-long-1) var(--easing-standard),
    transform var(--duration-long-2) var(--easing-emphasized-decelerate);
}

.text-reveal.revealed {
  clip-path: inset(0 0 0 0);
  opacity: 1;
  transform: translateY(0);
}

.text-reveal-line {
  display: block;
  overflow: hidden;
}

.text-reveal-line > span {
  display: block;
  transform: translateY(100%);
  transition: transform var(--duration-long-2) var(--easing-emphasized-decelerate);
}

.text-reveal-line.revealed > span {
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  .text-reveal,
  .text-reveal-line > span {
    clip-path: none;
    opacity: 1;
    transform: none;
    transition: none;
  }
}

.split-screen {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-6);
  max-width: 900px;
  margin: 0 auto;
}

.split-panel {
  padding: var(--space-7);
  border-radius: var(--radius-container);
  background: rgba(255, 255, 255, 0.02);
  backdrop-filter: blur(40px) saturate(1.1);
  -webkit-backdrop-filter: blur(40px) saturate(1.1);
  border: 1px solid rgba(255, 255, 255, 0.06);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12);
  transition: all var(--duration-medium-2) var(--spring-responsive);
  text-align: center;
  position: relative;
  overflow: hidden;
}





.split-panel:hover {
  border-color: rgba(255, 255, 255, 0.1);
  transform: translateY(-4px) scale(1.005);
  background: rgba(255, 255, 255, 0.04);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
}

.split-panel h3 {
  font-size: var(--text-headline-sm);
  margin-bottom: var(--space-1);
  font-weight: 600;
  letter-spacing: -0.01em;
}

.split-panel .role {
  font-size: var(--text-label-md);
  color: var(--color-text-tertiary);
  margin-bottom: var(--space-5);
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.split-panel ul {
  list-style: none;
}

.split-panel li {
  font-size: var(--text-body-md);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-3);
  transition: color var(--duration-short-4) var(--easing-standard);
}

.split-panel li::before {
  content: none;
}

.split-panel:hover li {
  color: var(--color-text);
}

/* ========== Core Architecture Section ========== */
.architecture {
  position: relative;
}

.architecture-headline {
  font-size: clamp(var(--text-headline-lg), 5vw, var(--text-display-md));
  font-weight: 700;
  text-align: center;
  margin-bottom: var(--space-3);
  letter-spacing: -0.02em;
}

.architecture-subhead {
  font-size: var(--text-body-lg);
  color: var(--color-text-secondary);
  text-align: center;
  margin-bottom: var(--space-10);
}

.process-flow {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-5);
  max-width: 1100px;
  margin: 0 auto;
  position: relative;
}

.process-flow::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 15%;
  right: 15%;
  height: 2px;
  background: linear-gradient(
    90deg,
    transparent 0%,
    var(--color-border) 10%,
    var(--color-border) 90%,
    transparent 100%
  );
  z-index: 0;
}

.process-flow::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 15%;
  right: 15%;
  height: 2px;
  background: linear-gradient(
    90deg,
    rgba(255, 255, 255, 0.3) 0%,
    rgba(255, 255, 255, 0.05) 50%,
    transparent 100%
  );
  background-size: 200% 100%;
  animation: flowPulse 3s ease-in-out infinite;
  z-index: 0;
}

@keyframes flowPulse {
  0%,
  100% {
    background-position: 200% 0;
    opacity: 0;
  }
  50% {
    background-position: 0% 0;
    opacity: 1;
  }
}

/* Connection arrows between steps */
.process-step:not(:last-child)::after {
  content: '';
  position: absolute;
  right: calc(-1 * var(--space-5) / 2 - 6px);
  top: 50%;
  transform: translateY(-50%);
  width: 0;
  height: 0;
  border-top: 6px solid transparent;
  border-bottom: 6px solid transparent;
  border-left: 8px solid var(--color-border);
  z-index: 1;
  opacity: 0.6;
  transition: opacity var(--duration-short-4) var(--easing-standard);
}

.process-step:hover::after {
  opacity: 1;
  border-left-color: var(--color-text-secondary);
}

@media (prefers-reduced-motion: reduce) {
  .process-flow::after {
    animation: none;
    opacity: 0;
  }
}

.process-step {
  text-align: center;
  padding: var(--space-7);
  border-radius: var(--radius-container);
  background: rgba(255, 255, 255, 0.02);
  backdrop-filter: blur(40px) saturate(1.1);
  -webkit-backdrop-filter: blur(40px) saturate(1.1);
  border: 1px solid rgba(255, 255, 255, 0.06);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12);
  position: relative;
  z-index: 1;
  transition: all var(--duration-medium-2) var(--spring-responsive);
  overflow: hidden;
}



.process-step > *:not(.process-number) {
  position: relative;
  z-index: 1;
}

.process-step:hover {
  transform: translateY(-5px) scale(1.01);
  border-color: rgba(255, 255, 255, 0.1);
  background: rgba(255, 255, 255, 0.04);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
}

.process-step:hover .process-number {
  border-color: rgba(255, 255, 255, 0.2);
  color: var(--color-text);
  transform: scale(1.1);
}

.process-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: var(--radius-full);
  background: var(--color-surface-container);
  border: 1px solid var(--color-border);
  font-size: var(--text-label-sm);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-4);
  font-family: var(--font-mono);
  font-weight: 600;
  transition: all var(--duration-short-4) var(--spring-responsive);
}

.process-title {
  font-size: var(--text-headline-sm);
  font-weight: 700;
  margin-bottom: var(--space-3);
  letter-spacing: -0.01em;
}

.process-title.typewriter {
  overflow: hidden;
  white-space: nowrap;
  border-right: 2px solid var(--color-text-secondary);
  width: 0;
  animation:
    typewriterExpand 0.8s var(--easing-emphasized-decelerate) forwards,
    typewriterCursor 0.5s step-end infinite;
}

.process-title.typewriter.typed {
  border-right-color: transparent;
}

@keyframes typewriterExpand {
  to {
    width: 100%;
  }
}

@keyframes typewriterCursor {
  50% {
    border-right-color: transparent;
  }
}

@media (prefers-reduced-motion: reduce) {
  .process-title.typewriter {
    width: 100%;
    border-right: none;
    animation: none;
  }
}

/* Progressive Image Blur-up Loading */
.blur-up {
  filter: blur(20px);
  transform: scale(1.05);
  transition:
    filter var(--duration-long-2) var(--easing-emphasized-decelerate),
    transform var(--duration-long-2) var(--easing-emphasized-decelerate);
}

.blur-up.loaded {
  filter: blur(0);
  transform: scale(1);
}

.blur-up-container {
  overflow: hidden;
  background: var(--color-surface-container);
}

@media (prefers-reduced-motion: reduce) {
  .blur-up {
    filter: none;
    transform: none;
    transition: none;
  }
}

/* Section Wipe Transition Effects */
.wipe-reveal {
  clip-path: inset(0 100% 0 0);
  transition: clip-path var(--duration-long-4) var(--easing-emphasized-decelerate);
}

.wipe-reveal.revealed {
  clip-path: inset(0 0 0 0);
}

.wipe-reveal-up {
  clip-path: inset(100% 0 0 0);
  transition: clip-path var(--duration-long-4) var(--easing-emphasized-decelerate);
}

.wipe-reveal-up.revealed {
  clip-path: inset(0 0 0 0);
}

@media (prefers-reduced-motion: reduce) {
  .wipe-reveal,
  .wipe-reveal-up {
    clip-path: none;
    transition: none;
  }
}

.process-subtitle {
  font-size: var(--text-label-md);
  color: var(--color-text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--space-4);
  font-family: var(--font-mono);
}

.process-description {
  font-size: var(--text-body-sm);
  color: var(--color-text-secondary);
  line-height: 1.6;
}

/* ========== Solution Cards Section ========== */
.solutions {
  background: linear-gradient(
    180deg,
    var(--color-bg) 0%,
    var(--color-surface) 50%,
    var(--color-bg) 100%
  );
  position: relative;
}

.solutions-headline {
  font-size: clamp(var(--text-headline-lg), 5vw, var(--text-display-md));
  font-weight: 700;
  text-align: center;
  margin-bottom: var(--space-3);
  letter-spacing: -0.02em;
}

.solutions-subhead {
  font-size: var(--text-body-lg);
  color: var(--color-text-secondary);
  text-align: center;
  margin-bottom: var(--space-10);
}

.solutions-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-5);
  max-width: 1200px;
  margin: 0 auto;
  perspective: 1500px;
}

.solution-card {
  padding: var(--space-6);
  border-radius: var(--radius-container);
  background: rgba(255, 255, 255, 0.02);
  backdrop-filter: blur(40px) saturate(1.1);
  -webkit-backdrop-filter: blur(40px) saturate(1.1);
  border: 1px solid rgba(255, 255, 255, 0.06);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12);
  text-align: center;
  transition: all var(--duration-medium-2) var(--spring-responsive);
  position: relative;
  overflow: hidden;
  transform-style: preserve-3d;
  perspective: 1000px;
}

/* Scroll-triggered stagger animation for cards */
.solution-card.stagger-reveal {
  opacity: 0;
  transform: translateY(40px);
}

.solution-card.stagger-reveal.revealed {
  opacity: 1;
  transform: translateY(0);
  transition:
    opacity var(--duration-long-2) var(--easing-emphasized-decelerate),
    transform var(--duration-long-2) var(--easing-emphasized-decelerate);
}

.solution-card.stagger-reveal:nth-child(1) {
  transition-delay: 0ms;
}
.solution-card.stagger-reveal:nth-child(2) {
  transition-delay: 80ms;
}
.solution-card.stagger-reveal:nth-child(3) {
  transition-delay: 160ms;
}
.solution-card.stagger-reveal:nth-child(4) {
  transition-delay: 240ms;
}
.solution-card.stagger-reveal:nth-child(5) {
  transition-delay: 320ms;
}
.solution-card.stagger-reveal:nth-child(6) {
  transition-delay: 400ms;
}

@media (prefers-reduced-motion: reduce) {
  .solution-card.stagger-reveal {
    opacity: 1;
    transform: none;
  }
}



.solution-card:hover {
  transform: translateY(-6px) scale(1.01);
  border-color: rgba(255, 255, 255, 0.1);
  background: rgba(255, 255, 255, 0.04);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
}

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

.solution-card:focus-visible {
  outline: none;
  box-shadow:
    0 0 0 3px var(--focus-ring-color),
    0 24px 48px rgba(0, 0, 0, 0.4);
  transform: translateY(-8px) scale(1.01);
}

.solution-card:active {
  transform: translateY(-4px) scale(0.99);
  transition: transform var(--duration-short-1) var(--easing-standard);
}

.solution-icon {
  font-family: var(--font-icon);
  font-size: var(--text-headline-md);
  font-weight: 300;
  margin-bottom: var(--space-4);
  display: block;
  font-style: normal;
  line-height: 1;
  letter-spacing: normal;
  text-transform: none;
  -webkit-font-smoothing: antialiased;
  font-feature-settings: 'liga';
  font-variation-settings:
    'FILL' 0,
    'wght' 300,
    'GRAD' 0,
    'opsz' 28;
}

.solution-title {
  font-size: var(--text-title-md);
  font-weight: 700;
  margin-bottom: var(--space-2);
  font-family: var(--font-mono);
  letter-spacing: -0.02em;
}

.solution-subtitle {
  font-size: var(--text-label-lg);
  color: var(--color-text);
  font-weight: 600;
  margin-bottom: var(--space-3);
}

.solution-description {
  font-size: var(--text-body-sm);
  color: var(--color-text-secondary);
  line-height: 1.6;
}

/* ========== Governance Section ========== */
.governance {
  position: relative;
}

.governance::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent 0%, var(--color-border) 50%, transparent 100%);
}

.governance-headline {
  font-size: clamp(var(--text-headline-lg), 5vw, var(--text-display-md));
  font-weight: 700;
  text-align: center;
  margin-bottom: var(--space-3);
  letter-spacing: -0.02em;
}

.governance-subhead {
  font-size: var(--text-body-lg);
  color: var(--color-text-secondary);
  text-align: center;
  margin-bottom: var(--space-10);
}

.governance-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-5);
  max-width: 1000px;
  margin: 0 auto;
}

.governance-card {
  padding: var(--space-6);
  border-radius: var(--radius-container);
  background: rgba(255, 255, 255, 0.02);
  backdrop-filter: blur(40px) saturate(1.1);
  -webkit-backdrop-filter: blur(40px) saturate(1.1);
  border: 1px solid rgba(255, 255, 255, 0.06);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12);
  text-align: center;
  transition: all var(--duration-medium-2) var(--spring-responsive);
  position: relative;
  overflow: hidden;
}



.governance-card:hover {
  transform: translateY(-5px) scale(1.01);
  border-color: rgba(255, 255, 255, 0.1);
  background: rgba(255, 255, 255, 0.04);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
}

.governance-card:hover .governance-icon {
  transform: scale(1.1);
}

.governance-card:focus-visible {
  outline: none;
  box-shadow:
    0 0 0 3px var(--focus-ring-color),
    0 16px 40px rgba(0, 0, 0, 0.3);
  transform: translateY(-6px) scale(1.01);
}

.governance-card:active {
  transform: translateY(-3px) scale(0.99);
  transition: transform var(--duration-short-1) var(--easing-standard);
}

.governance-icon {
  font-size: var(--text-headline-lg);
  margin-bottom: var(--space-4);
  display: block;
  transition: transform var(--duration-short-4) var(--spring-responsive);
}

.governance-icon.material-symbol {
  font-family: var(--font-icon);
  font-weight: 300;
  font-style: normal;
  line-height: 1;
  letter-spacing: normal;
  text-transform: none;
  white-space: nowrap;
  word-wrap: normal;
  direction: ltr;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  font-feature-settings: 'liga';
  font-variation-settings:
    'FILL' 0,
    'wght' 300,
    'GRAD' 0,
    'opsz' 32;
}

.governance-title {
  font-size: var(--text-title-md);
  font-weight: 700;
  margin-bottom: var(--space-2);
  letter-spacing: -0.01em;
}

.governance-description {
  font-size: var(--text-body-sm);
  color: var(--color-text-secondary);
  line-height: 1.6;
}

/* ========== Integration Marquee Section ========== */
.marquee-section {
  padding: var(--space-11) 0;
  overflow: hidden;
  position: relative;
  background: linear-gradient(
    180deg,
    var(--color-surface) 0%,
    var(--color-bg) 50%,
    var(--color-surface) 100%
  );
}

.marquee-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(
    90deg,
    transparent 0%,
    var(--color-border-strong) 50%,
    transparent 100%
  );
}

.marquee-section::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(
    90deg,
    transparent 0%,
    var(--color-border-strong) 50%,
    transparent 100%
  );
}

[data-theme="light"] .marquee-section {
  background: linear-gradient(
    180deg,
    var(--color-surface) 0%,
    var(--color-bg) 50%,
    var(--color-surface) 100%
  );
}

.marquee-title {
  text-align: center;
  font-family: var(--font-mono);
  font-size: var(--text-label-sm);
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-text-tertiary);
  margin-bottom: var(--space-8);
}

[data-theme="light"] .marquee-title {
  color: var(--color-text-tertiary);
}

.marquee-track {
  display: flex;
  gap: var(--space-5);
  animation: marquee 45s linear infinite;
  width: max-content;
  padding: 0 var(--space-4);
}

.marquee-track:hover,
.marquee-container:focus .marquee-track,
.marquee-container:focus-within .marquee-track {
  animation-play-state: paused;
}

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

.marquee-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-5);
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-component);
  white-space: nowrap;
  transition: all var(--duration-medium-2) var(--spring-responsive);
  cursor: default;
}

.marquee-item:hover {
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(255, 255, 255, 0.15);
  transform: translateY(-4px) scale(1.02);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
}

[data-theme="light"] .marquee-item {
  background: rgba(0, 0, 0, 0.02);
  border: 1px solid var(--color-border);
}

[data-theme="light"] .marquee-item:hover {
  background: rgba(0, 0, 0, 0.04);
  border-color: rgba(0, 0, 0, 0.15);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
}

.marquee-icon {
  font-family: var(--font-icon);
  font-size: 22px;
  font-weight: 300;
  font-style: normal;
  line-height: 1;
  letter-spacing: normal;
  text-transform: none;
  white-space: nowrap;
  word-wrap: normal;
  direction: ltr;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  font-feature-settings: 'liga';
  font-variation-settings:
    'FILL' 0,
    'wght' 300,
    'GRAD' 0,
    'opsz' 24;
  color: var(--color-text-secondary);
  transition: color var(--duration-short-4) var(--easing-standard);
}

.marquee-item:hover .marquee-icon {
  color: var(--color-text);
}

[data-theme="light"] .marquee-icon {
  color: var(--color-text-secondary);
}

[data-theme="light"] .marquee-item:hover .marquee-icon {
  color: var(--color-text);
}

.marquee-text {
  font-size: var(--text-body-sm);
  font-weight: 500;
  color: var(--color-text-secondary);
  transition: color var(--duration-short-4) var(--easing-standard);
}

.marquee-item:hover .marquee-text {
  color: var(--color-text);
}

[data-theme="light"] .marquee-text {
  color: var(--color-text-secondary);
}

[data-theme="light"] .marquee-item:hover .marquee-text {
  color: var(--color-text);
}

/* Marquee container with fade edges for seamless scroll effect */
.marquee-container {
  position: relative;
  overflow: hidden;
  mask-image: linear-gradient(
    to right,
    transparent 0%,
    black 8%,
    black 92%,
    transparent 100%
  );
  -webkit-mask-image: linear-gradient(
    to right,
    transparent 0%,
    black 8%,
    black 92%,
    transparent 100%
  );
}

@media (prefers-reduced-motion: reduce) {
  .marquee-track {
    animation: none;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--space-3);
  }

  .marquee-container {
    mask-image: none;
    -webkit-mask-image: none;
  }
}

@media (max-width: 768px) {
  .marquee-section {
    padding: var(--space-9) 0;
  }

  .marquee-item {
    padding: var(--space-2) var(--space-4);
  }

  .marquee-icon {
    font-size: 20px;
  }

  .marquee-text {
    font-size: var(--text-label-lg);
  }
}

/* ========== Evolution Section ========== */
.evolution {
  position: relative;
  background: linear-gradient(
    180deg,
    rgba(255, 255, 255, 0.01) 0%,
    transparent 50%,
    rgba(255, 255, 255, 0.01) 100%
  );
}

.evolution::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent 0%, var(--color-border) 50%, transparent 100%);
}

.evolution-headline {
  font-size: clamp(var(--text-headline-lg), 5vw, var(--text-display-md));
  font-weight: 700;
  text-align: center;
  margin-bottom: var(--space-3);
  letter-spacing: -0.02em;
}

.evolution-subhead {
  font-size: var(--text-body-lg);
  color: var(--color-text-secondary);
  text-align: center;
  margin-bottom: var(--space-10);
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

.evolution-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-5);
  max-width: 1000px;
  margin: 0 auto var(--space-10);
}

.evolution-stat {
  text-align: center;
  padding: var(--space-6);
  border-radius: var(--radius-container);
  background: rgba(255, 255, 255, 0.02);
  backdrop-filter: blur(40px) saturate(1.1);
  -webkit-backdrop-filter: blur(40px) saturate(1.1);
  border: 1px solid rgba(255, 255, 255, 0.06);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12);
  transition: all var(--duration-medium-2) var(--spring-responsive);
  position: relative;
  overflow: hidden;
}



.evolution-stat:hover {
  transform: translateY(-5px) scale(1.01);
  border-color: rgba(255, 255, 255, 0.1);
  background: rgba(255, 255, 255, 0.04);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
}

.evolution-stat:hover .evolution-number {
  transform: scale(1.05);
}

.evolution-number {
  font-size: var(--text-display-sm);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-2);
  background: linear-gradient(135deg, var(--color-text) 0%, var(--color-text-secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  transition: transform var(--duration-short-4) var(--spring-responsive);
}

.evolution-label {
  font-size: var(--text-body-sm);
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.evolution-story {
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
  padding: var(--space-8);
  border-radius: var(--radius-container);
  background: rgba(255, 255, 255, 0.02);
  backdrop-filter: blur(40px) saturate(1.1);
  -webkit-backdrop-filter: blur(40px) saturate(1.1);
  border: 1px solid rgba(255, 255, 255, 0.06);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12);
  position: relative;
  overflow: hidden;
}



.evolution-story-title {
  font-size: var(--text-title-lg);
  font-weight: 700;
  margin-bottom: var(--space-4);
  letter-spacing: -0.01em;
}

.evolution-story-text {
  font-size: var(--text-body-md);
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: var(--space-8);
}

.evolution-story-text strong {
  color: var(--color-text);
  font-weight: 600;
}

.evolution-hierarchy {
  display: flex;
  justify-content: center;
  gap: var(--space-2);
  margin-top: var(--space-8);
  flex-wrap: wrap;
}

.hierarchy-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-full);
  border: 1px solid var(--color-border);
  font-size: var(--text-body-sm);
  color: var(--color-text-secondary);
  transition: all var(--duration-short-4) var(--spring-responsive);
  cursor: default;
}

.hierarchy-item:hover {
  border-color: rgba(255, 255, 255, 0.15);
  color: var(--color-text);
  background: rgba(255, 255, 255, 0.03);
}

.hierarchy-item::before {
  content: '';
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-text-tertiary);
  transition: background var(--duration-short-4) var(--spring-responsive);
}

.hierarchy-item:hover::before {
  background: var(--color-text-secondary);
}

.hierarchy-arrow {
  color: var(--color-text-tertiary);
  font-size: 16px;
}

@media (max-width: 768px) {
  .evolution-stats {
    grid-template-columns: repeat(2, 1fr);
  }
  .evolution-hierarchy {
    flex-direction: column;
    align-items: center;
    gap: var(--space-3);
  }
  .hierarchy-arrow {
    transform: rotate(90deg);
    margin: calc(-1 * var(--space-1)) 0;
  }
}

/* Development Volume */
.evolution-volume {
  max-width: 1000px;
  margin: var(--space-10) auto 0;
  text-align: center;
}

.evolution-volume-title {
  font-size: var(--text-body-sm);
  font-weight: 600;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-6);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.volume-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-4);
}

.volume-item {
  padding: var(--space-5);
  border-radius: var(--radius-container);
  background: rgba(255, 255, 255, 0.02);
  backdrop-filter: blur(40px) saturate(1.1);
  -webkit-backdrop-filter: blur(40px) saturate(1.1);
  border: 1px solid rgba(255, 255, 255, 0.06);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12);
  transition: all var(--duration-medium-2) var(--spring-responsive);
  position: relative;
  overflow: hidden;
}



.volume-item:hover {
  border-color: rgba(255, 255, 255, 0.1);
  background: rgba(255, 255, 255, 0.04);
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
}

.volume-item:hover .volume-icon {
  color: var(--color-text-secondary);
  transform: scale(1.1);
}

.volume-item:hover .volume-stat {
  transform: scale(1.02);
}

.volume-icon {
  font-size: 28px;
  color: var(--color-text-tertiary);
  display: block;
  margin-bottom: var(--space-3);
  transition: all var(--duration-short-4) var(--spring-responsive);
}

.volume-stat {
  font-size: var(--text-display-sm);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-1);
  transition: transform var(--duration-short-4) var(--spring-responsive);
}

.volume-label {
  font-size: var(--text-body-xs);
  color: var(--color-text-tertiary);
}

@media (max-width: 768px) {
  .volume-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 480px) {
  .volume-grid {
    grid-template-columns: 1fr;
  }
}

/* ========== Code Breakdown Section ========== */
.code-breakdown {
  max-width: 600px;
  margin: var(--space-10) auto var(--space-8);
  padding: var(--space-8);
  border-radius: var(--radius-container);
  background: rgba(255, 255, 255, 0.02);
  backdrop-filter: blur(40px) saturate(1.1);
  -webkit-backdrop-filter: blur(40px) saturate(1.1);
  border: 1px solid rgba(255, 255, 255, 0.06);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12);
  position: relative;
  overflow: hidden;
}



.breakdown-title {
  font-size: var(--text-body-sm);
  font-weight: 600;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-6);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  text-align: center;
}

.breakdown-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-4);
}

.breakdown-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-element);
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--color-border-subtle);
  transition: all var(--duration-short-4) var(--easing-standard);
}

.breakdown-item:hover {
  background: rgba(255, 255, 255, 0.05);
  border-color: var(--color-border);
}

.breakdown-lang {
  font-size: var(--text-body-sm);
  color: var(--color-text-secondary);
  font-family: var(--font-mono);
}

.breakdown-lines {
  font-size: var(--text-body-sm);
  font-weight: 600;
  color: var(--color-text);
  font-family: var(--font-mono);
}

.breakdown-note {
  margin-top: var(--space-6);
  font-size: var(--text-body-xs);
  color: var(--color-text-tertiary);
  text-align: center;
  line-height: 1.6;
}

@media (max-width: 480px) {
  .breakdown-grid {
    grid-template-columns: 1fr;
  }
}

/* Continuous Learning */
.evolution-learning {
  max-width: 800px;
  margin: var(--space-12) auto var(--space-8);
  padding: var(--space-8);
  text-align: center;
}

.learning-title {
  font-size: var(--text-body-sm);
  font-weight: 600;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-5);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.learning-text {
  font-size: var(--text-body-base);
  color: var(--color-text-secondary);
  line-height: 1.8;
  margin-bottom: var(--space-10);
}

.learning-flow {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-4);
  flex-wrap: wrap;
}

.flow-step {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-4);
  background: rgba(255, 255, 255, 0.02);
  backdrop-filter: blur(40px) saturate(1.1);
  -webkit-backdrop-filter: blur(40px) saturate(1.1);
  border: 1px solid rgba(255, 255, 255, 0.06);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12);
  border-radius: var(--radius-component);
  transition: all var(--duration-short-4) var(--spring-responsive);
  min-width: 72px;
  position: relative;
  overflow: hidden;
}



.flow-step:hover {
  border-color: rgba(255, 255, 255, 0.1);
  background: rgba(255, 255, 255, 0.04);
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
}

.flow-icon {
  font-size: 24px;
  color: var(--color-text-secondary);
  transition: color var(--duration-short-4) var(--easing-standard);
}

.flow-step:hover .flow-icon {
  color: var(--color-text);
}

.flow-label {
  font-size: var(--text-body-xs);
  font-family: var(--font-mono);
  color: var(--color-text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.flow-arrow {
  font-size: 18px;
  color: var(--color-text-tertiary);
  transition: transform var(--duration-short-4) var(--spring-responsive);
}

.learning-flow:hover .flow-arrow {
  animation: pulse-arrow 1.5s ease-in-out infinite;
}

@keyframes pulse-arrow {
  0%,
  100% {
    opacity: 0.4;
  }
  50% {
    opacity: 0.8;
  }
}

/* Evolution Comparison Table */
.evolution-comparison {
  margin-top: var(--space-10);
  padding: var(--space-8);
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-container);
}

.comparison-title {
  font-size: var(--text-title-md);
  font-weight: 600;
  color: var(--color-text);
  text-align: center;
  margin-bottom: var(--space-2);
}

.comparison-subtitle {
  font-size: var(--text-body-md);
  color: var(--color-text-secondary);
  text-align: center;
  margin-bottom: var(--space-6);
}

.comparison-table {
  display: grid;
  gap: var(--space-2);
  margin-bottom: var(--space-6);
}

.comparison-header,
.comparison-row {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-4);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-element);
}

.comparison-header {
  background: rgba(255, 255, 255, 0.06);
  font-weight: 600;
  font-size: var(--text-label-md);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-secondary);
}

.comparison-row {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--color-border-subtle);
  transition: all var(--duration-short-4) var(--easing-standard);
}

.comparison-row:hover {
  background: rgba(255, 255, 255, 0.04);
  border-color: var(--color-border);
}

.comparison-row.highlight {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.2);
}

.comparison-row.highlight:hover {
  background: rgba(255, 255, 255, 0.12);
}

.comparison-col {
  font-size: var(--text-body-md);
  color: var(--color-text-secondary);
}

.comparison-row.highlight .comparison-col {
  color: var(--color-text);
}

.comparison-metrics {
  display: flex;
  justify-content: center;
  gap: var(--space-8);
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-border-subtle);
}

.metric-item {
  text-align: center;
}

.metric-value {
  display: block;
  font-size: var(--text-headline-md);
  font-weight: 700;
  color: var(--color-text);
  line-height: 1;
  margin-bottom: var(--space-1);
}

.metric-label {
  font-size: var(--text-label-md);
  color: var(--color-text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

@media (max-width: 768px) {
  .comparison-header,
  .comparison-row {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-2);
  }

  .comparison-metrics {
    flex-direction: column;
    gap: var(--space-4);
  }
}

/* ========== Footer ========== */
.footer {
  padding: var(--section-padding-sm) var(--space-6);
  border-top: 1px solid var(--color-border-subtle);
  background: var(--color-surface);
}

.footer-inner {
  max-width: 1400px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-9);
}

.footer-brand {
  max-width: 300px;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
  text-decoration: none;
  color: var(--color-text);
}

.footer-logo img {
  width: 28px;
  height: 28px;
  object-fit: contain;
}

.footer-logo-text {
  font-family: var(--font-mono);
  font-size: var(--text-title-sm);
  font-weight: 600;
}

.footer-tagline {
  font-size: var(--text-body-sm);
  color: var(--color-text-secondary);
  line-height: 1.6;
}

.footer-section h4 {
  font-size: var(--text-label-lg);
  font-weight: 600;
  margin-bottom: var(--space-4);
  color: var(--color-text);
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: var(--space-2);
}

.footer-links a {
  font-size: var(--text-body-sm);
  color: var(--color-text-secondary);
  text-decoration: none;
  transition: all var(--duration-short-4) var(--easing-standard);
  display: inline-block;
}

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

.footer-bottom {
  max-width: 1400px;
  margin: var(--space-8) auto 0;
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-border-subtle);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer-copyright {
  font-size: var(--text-label-md);
  color: var(--color-text-tertiary);
}

.footer-legal {
  display: flex;
  gap: var(--space-5);
}

.footer-legal a {
  font-size: var(--text-label-md);
  color: var(--color-text-tertiary);
  text-decoration: none;
  transition: all var(--duration-short-4) var(--easing-standard);
}

.footer-legal a:hover {
  color: var(--color-text-secondary);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ========== Scroll Progress Indicator ========== */
.scroll-indicator {
  position: fixed;
  right: var(--space-4);
  top: 50%;
  transform: translateY(-50%);
  z-index: 100;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  opacity: 0;
  transition: opacity var(--duration-medium-2) var(--easing-standard);
}

.scroll-indicator.visible {
  opacity: 1;
}

.scroll-dot {
  position: relative;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-border);
  transition: all var(--duration-short-4) var(--easing-standard);
  cursor: pointer;
}

.scroll-dot:hover {
  background: var(--color-text-secondary);
  transform: scale(1.25);
}

.scroll-dot::before {
  content: attr(aria-label);
  position: absolute;
  right: calc(100% + var(--space-2));
  top: 50%;
  transform: translateY(-50%) translateX(8px);
  white-space: nowrap;
  font-size: var(--text-body-sm);
  color: var(--color-text-secondary);
  opacity: 0;
  transition: all var(--duration-short-4) var(--easing-standard);
  pointer-events: none;
}

.scroll-dot:hover::before,
.scroll-dot:focus-visible::before {
  opacity: 1;
  transform: translateY(-50%) translateX(0);
}

.scroll-dot.active {
  background: var(--color-text);
  transform: scale(1.5);
}

.scroll-dot:focus-visible {
  outline: none;
  background: var(--color-text);
  transform: scale(1.5);
  box-shadow: 0 0 0 3px var(--focus-ring-color);
}

.scroll-dot:active {
  transform: scale(1.1);
  transition: transform var(--duration-short-1) var(--easing-standard);
}

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

@media (prefers-reduced-motion: reduce) {
  .scroll-indicator {
    display: none;
  }
}

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

  .footer-inner {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-7);
  }

  .footer-brand {
    grid-column: 1 / -1;
    max-width: none;
  }
}

@media (max-width: 768px) {
  .section-label {
    font-size: 10px;
    letter-spacing: 0.15em;
  }

  .philosophy-headline,
  .architecture-headline,
  .solutions-headline,
  .governance-headline {
    font-size: clamp(24px, 6vw, var(--text-headline-lg));
    line-height: 1.2;
  }

  .philosophy-subhead,
  .architecture-subhead,
  .solutions-subhead,
  .governance-subhead {
    font-size: var(--text-body-md);
    padding: 0 var(--space-2);
  }

  /* Split Screen */
  .split-screen {
    grid-template-columns: 1fr;
    gap: var(--space-4);
  }

  .split-panel {
    padding: var(--space-5);
  }

  .split-panel h3 {
    font-size: var(--text-title-md);
  }

  /* Process Flow */
  .process-flow {
    grid-template-columns: 1fr;
    gap: var(--space-4);
  }

  .process-flow::before,
  .process-flow::after {
    display: none;
  }

  .process-step {
    padding: var(--space-5);
  }

  .process-step:not(:last-child)::after {
    display: none;
  }

  .process-title {
    font-size: var(--text-title-md);
  }

  /* Solutions Grid */
  .solutions-grid {
    grid-template-columns: 1fr;
    gap: var(--space-4);
  }

  .solution-card {
    padding: var(--space-5);
  }

  /* Governance Grid */
  .governance-grid {
    grid-template-columns: 1fr;
    gap: var(--space-4);
  }

  .governance-card {
    padding: var(--space-5);
  }

  /* Workflow / Learning Flow */
  .learning-flow {
    flex-direction: column;
    align-items: center;
    gap: var(--space-1);
  }

  .flow-step {
    width: 100%;
    max-width: 200px;
  }

  .flow-arrow {
    transform: rotate(90deg);
    font-size: 18px;
  }

  /* Footer */
  .footer {
    padding: var(--space-8) var(--space-4);
  }

  .footer-inner {
    grid-template-columns: 1fr;
    gap: var(--space-6);
    text-align: center;
  }

  .footer-brand {
    text-align: center;
  }

  .footer-logo {
    justify-content: center;
  }

  .footer-bottom {
    flex-direction: column;
    gap: var(--space-4);
    text-align: center;
  }

  .footer-legal {
    justify-content: center;
  }
}

/* Extra small screens (320px - 480px) */
@media (max-width: 480px) {
  .split-panel,
  .process-step,
  .solution-card,
  .governance-card {
    padding: var(--space-4);
  }
}

/* ========== Reduced Motion Support ========== */
@media (prefers-reduced-motion: reduce) {
  .fade-in {
    opacity: 1;
    transform: none;
  }
}