:root {
  --navy: #071426;
  --navy-2: #0d2038;
  --gold: #c8a24a;
  --gold-strong: #f0c45c;
  --gold-soft: #f2dc96;
  --blue: #36d7ff;
  --ink: #122033;
  --muted: #5e6b79;
  --paper: #fbfbf8;
  --white: #ffffff;
  --line: #dfe4e8;
  --shadow: 0 24px 70px rgba(7, 20, 38, 0.1);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 90px;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, sans-serif;
  line-height: 1.78;
}

a {
  color: inherit;
  text-decoration: none;
}

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

.page-header {
  position: sticky;
  z-index: 10;
  top: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 14px clamp(20px, 4vw, 64px);
  color: var(--white);
  background: rgba(7, 20, 38, 0.92);
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-height: 36px;
  white-space: nowrap;
}

.brand-logo {
  width: clamp(70px, 6.2vw, 96px);
  height: auto;
  object-fit: contain;
}

.ai-badge {
  display: inline-grid;
  place-items: center;
  width: 28px;
  height: 28px;
  color: var(--white);
  font-size: 0.68rem;
  font-weight: 900;
  border: 1px solid rgba(54, 215, 255, 0.68);
  border-radius: 999px;
  background: linear-gradient(135deg, rgba(54, 215, 255, 0.24), rgba(200, 162, 74, 0.15));
  box-shadow: 0 0 22px rgba(54, 215, 255, 0.2);
}

.nav-links {
  display: flex;
  gap: clamp(14px, 2.2vw, 30px);
  color: rgba(255, 255, 255, 0.78);
  font-size: 0.92rem;
  font-weight: 650;
}

.nav-links a {
  padding: 6px 0;
  transition: color 180ms ease;
}

.nav-links a:hover,
.nav-links a:focus-visible {
  color: var(--gold-soft);
}

.paper-shell {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
}

.hero-paper {
  position: relative;
  overflow: hidden;
  color: var(--white);
  background:
    radial-gradient(circle at 80% 20%, rgba(54, 215, 255, 0.14), transparent 28%),
    linear-gradient(135deg, var(--navy), #09192d 54%, var(--navy-2));
}

.hero-paper::after {
  content: "";
  position: absolute;
  inset: auto 0 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(240, 196, 92, 0.55), transparent);
}

.hero-paper .paper-shell {
  padding: clamp(96px, 13vw, 172px) 0 clamp(72px, 10vw, 118px);
}

.eyebrow {
  margin: 0 0 18px;
  color: var(--gold-strong);
  font-size: 0.78rem;
  font-weight: 850;
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  overflow-wrap: anywhere;
}

h1 {
  max-width: 880px;
  margin: 0;
  font-size: clamp(3.5rem, 8vw, 7.8rem);
  line-height: 0.96;
  letter-spacing: 0;
}

.hero-summary {
  max-width: 760px;
  margin: 34px 0 0;
  color: rgba(255, 255, 255, 0.78);
  font-size: clamp(1.18rem, 1.8vw, 1.55rem);
  line-height: 1.68;
}

.paper-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 42px;
}

.paper-meta span,
.partner-points span {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 7px 12px;
  color: rgba(255, 255, 255, 0.78);
  font-size: 0.82rem;
  font-weight: 760;
  border: 1px solid rgba(234, 216, 163, 0.22);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.045);
}

.intro-band {
  padding: clamp(54px, 7vw, 84px) 0;
  background: var(--white);
  border-bottom: 1px solid var(--line);
}

.intro-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(280px, 0.65fr);
  gap: clamp(32px, 6vw, 84px);
  align-items: start;
}

.lead {
  margin: 0;
  font-size: clamp(1.36rem, 2.25vw, 2.1rem);
  line-height: 1.42;
  letter-spacing: 0;
}

.principle-box {
  margin: 0;
  padding: 26px;
  border: 1px solid rgba(200, 162, 74, 0.34);
  border-radius: 8px;
  background: #fffdf7;
  box-shadow: var(--shadow);
}

.principle-box span {
  display: block;
  margin-bottom: 12px;
  color: var(--gold);
  font-size: 0.75rem;
  font-weight: 850;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.principle-box strong {
  display: block;
  color: var(--navy);
  font-size: 1.16rem;
  line-height: 1.42;
}

.paper-section {
  padding: clamp(76px, 9vw, 128px) 0;
}

.paper-section-tinted {
  background: #f3f6f8;
}

.paper-section-dark {
  color: var(--white);
  background:
    radial-gradient(circle at 88% 18%, rgba(54, 215, 255, 0.12), transparent 30%),
    linear-gradient(135deg, var(--navy), var(--navy-2));
}

.section-grid {
  display: grid;
  grid-template-columns: minmax(160px, 0.28fr) minmax(0, 0.72fr);
  gap: clamp(32px, 6vw, 86px);
}

.section-label {
  position: sticky;
  top: 104px;
  align-self: start;
  color: var(--muted);
}

.section-label span {
  display: block;
  color: var(--gold);
  font-size: 0.82rem;
  font-weight: 900;
  letter-spacing: 0.14em;
}

.section-label p {
  margin: 8px 0 0;
  font-size: 0.92rem;
  font-weight: 760;
  line-height: 1.35;
}

.paper-section-dark .section-label,
.paper-section-dark .section-body p {
  color: rgba(255, 255, 255, 0.72);
}

h2 {
  max-width: 820px;
  margin: 0;
  color: var(--navy);
  font-size: clamp(2.25rem, 4.6vw, 4.4rem);
  line-height: 1.08;
  letter-spacing: 0;
}

.paper-section-dark h2,
.paper-section-final h2 {
  color: var(--white);
}

.section-body > p {
  max-width: 760px;
  margin: 28px 0 0;
  color: var(--muted);
  font-size: clamp(1.05rem, 1.35vw, 1.2rem);
  line-height: 1.86;
}

.spectrum,
.city-diagram,
.domain-matrix,
.comparison-table,
.knowledge-flow,
.creation-map,
.pull-quote,
.callout-box,
.callout-grid {
  margin-top: clamp(38px, 5vw, 56px);
}

.pull-quote {
  max-width: 800px;
  margin-left: 0;
  margin-right: 0;
  padding: 28px 0 28px 28px;
  border-left: 3px solid var(--gold);
}

.pull-quote p {
  margin: 0;
  color: var(--navy);
  font-size: clamp(1.35rem, 2.2vw, 2rem);
  font-weight: 720;
  line-height: 1.38;
}

.callout-box {
  padding: 26px;
  border: 1px solid rgba(200, 162, 74, 0.34);
  border-radius: 8px;
  background: #fffdf7;
  box-shadow: 0 18px 42px rgba(7, 20, 38, 0.06);
}

.callout-box span {
  display: block;
  margin-bottom: 14px;
  color: var(--gold);
  font-size: 0.76rem;
  font-weight: 900;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

.callout-box p {
  margin: 0;
  color: var(--muted);
  font-size: 1.02rem;
  line-height: 1.72;
}

.callout-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.spectrum {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--line);
}

.spectrum div {
  min-height: 146px;
  padding: 22px;
  background: var(--white);
}

.spectrum span {
  color: var(--gold);
  font-size: 0.78rem;
  font-weight: 850;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.spectrum strong {
  display: block;
  margin-top: 22px;
  color: var(--navy);
  font-size: 1.05rem;
  line-height: 1.36;
}

.city-diagram {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.city-diagram article {
  min-height: 254px;
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
  box-shadow: 0 18px 40px rgba(7, 20, 38, 0.06);
}

.city-diagram h3 {
  margin: 0;
  color: var(--navy);
  font-size: 1.42rem;
  line-height: 1.2;
}

.city-diagram p {
  margin: 20px 0 0;
  color: var(--muted);
  font-size: 0.98rem;
  line-height: 1.74;
}

.domain-matrix {
  display: grid;
  grid-template-columns: 0.34fr 0.66fr;
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
  background: var(--white);
}

.comparison-table {
  display: grid;
  grid-template-columns: 0.42fr 0.58fr;
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
  background: var(--white);
}

.comparison-table div {
  padding: 20px 22px;
  border-bottom: 1px solid var(--line);
}

.comparison-table div:nth-child(2n + 1) {
  border-right: 1px solid var(--line);
  color: var(--navy);
  font-weight: 850;
}

.comparison-table div:nth-last-child(-n + 2) {
  border-bottom: 0;
}

.comparison-table .table-head {
  color: var(--white);
  background: var(--navy);
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.paper-section-dark .comparison-table {
  border-color: rgba(234, 216, 163, 0.2);
  background: rgba(255, 255, 255, 0.055);
}

.paper-section-dark .comparison-table div {
  border-color: rgba(234, 216, 163, 0.18);
  color: rgba(255, 255, 255, 0.76);
}

.paper-section-dark .comparison-table div:nth-child(2n + 1) {
  color: var(--gold-soft);
}

.paper-section-dark .comparison-table .table-head {
  color: var(--navy);
  background: var(--gold-soft);
}

.domain-matrix div {
  padding: 20px 22px;
  border-bottom: 1px solid var(--line);
}

.domain-matrix div:nth-child(2n + 1) {
  border-right: 1px solid var(--line);
  color: var(--navy);
  font-weight: 850;
}

.domain-matrix div:nth-last-child(-n + 2) {
  border-bottom: 0;
}

.domain-matrix .matrix-head {
  color: var(--white);
  background: var(--navy);
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.knowledge-flow {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
  padding: 0;
  list-style: none;
}

.methodology-flow li {
  border-color: rgba(200, 162, 74, 0.26);
  background: var(--white);
  box-shadow: 0 16px 36px rgba(7, 20, 38, 0.06);
}

.methodology-flow strong {
  color: var(--navy);
}

.knowledge-flow li {
  min-height: 168px;
  padding: 24px;
  border: 1px solid rgba(234, 216, 163, 0.24);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.055);
}

.knowledge-flow span {
  display: block;
  margin-bottom: 28px;
  color: var(--gold-strong);
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0.12em;
}

.knowledge-flow strong {
  color: var(--white);
  font-size: 1.02rem;
  line-height: 1.38;
}

.creation-map {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.creation-map span {
  position: relative;
  display: inline-flex;
  align-items: center;
  min-height: 54px;
  padding: 12px 18px;
  color: var(--navy);
  font-weight: 820;
  border: 1px solid rgba(200, 162, 74, 0.34);
  border-radius: 999px;
  background: var(--white);
}

.creation-map span:not(:last-child)::after {
  content: "";
  width: 22px;
  height: 1px;
  margin-left: 18px;
  background: linear-gradient(90deg, var(--gold), var(--blue));
}

.paper-section-final {
  padding: clamp(76px, 9vw, 128px) 0;
  color: var(--white);
  background: #040d18;
}

.final-panel {
  max-width: 960px;
}

.final-panel h2 {
  max-width: 780px;
  margin: 0;
}

.final-panel p {
  max-width: 820px;
  margin: 30px 0 0;
  color: rgba(255, 255, 255, 0.76);
  font-size: clamp(1.08rem, 1.5vw, 1.28rem);
  line-height: 1.84;
}

.partner-points {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 40px;
}

.page-footer {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding: 22px clamp(20px, 4vw, 64px);
  color: rgba(255, 255, 255, 0.66);
  background: #020914;
  font-size: 0.92rem;
}

.page-footer a {
  color: var(--gold-soft);
  font-weight: 760;
}

@media (max-width: 900px) {
  .page-header {
    align-items: flex-start;
  }

  .nav-links {
    display: none;
  }

  .intro-grid,
  .section-grid {
    grid-template-columns: 1fr;
  }

  .section-label {
    position: static;
  }

  .spectrum,
  .city-diagram,
  .knowledge-flow,
  .callout-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 620px) {
  .page-header {
    padding: 16px 20px;
  }

  .brand-logo {
    width: 76px;
  }

  .ai-badge {
    width: 26px;
    height: 26px;
    font-size: 0.64rem;
  }

  h1 {
    font-size: clamp(3rem, 17vw, 4.25rem);
  }

  .lead {
    font-size: 1.32rem;
  }

  .spectrum,
  .city-diagram,
  .knowledge-flow,
  .domain-matrix,
  .comparison-table,
  .callout-grid {
    grid-template-columns: 1fr;
  }

  .domain-matrix div,
  .domain-matrix div:nth-child(2n + 1),
  .comparison-table div,
  .comparison-table div:nth-child(2n + 1) {
    border-right: 0;
  }

  .domain-matrix .matrix-head:nth-child(2),
  .comparison-table .table-head:nth-child(2) {
    display: none;
  }

  .page-footer {
    flex-direction: column;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 1ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: 1ms !important;
  }
}

/* Fix methodology cards on light background: preserve approved layout, restore readable text */
.methodology-flow li {
  border-color: rgba(200, 162, 74, 0.26);
  background: var(--white);
  box-shadow: 0 16px 36px rgba(7, 20, 38, 0.06);
}
.methodology-flow span {
  color: var(--gold-strong);
}
.methodology-flow strong {
  color: var(--navy);
}

/* Language selector added for bilingual site */
.language-switch { white-space: nowrap; font-weight: 700; }