:root {
  color-scheme: light;
  --canvas: #f8f2ea;
  --surface: rgba(255, 255, 255, 0.72);
  --surface-strong: #fffdf9;
  --surface-soft: #efe4d8;
  --ink: #1b1814;
  --ink-soft: #4b433a;
  --muted: #7a7268;
  --line: rgba(27, 24, 20, 0.12);
  --coral: #c47057;
  --coral-deep: #9f5641;
  --sage: #668273;
  --sage-soft: #dce8e2;
  --navy: #1a2130;
  --gold: #d7b06a;
  --shadow: 0 28px 60px rgba(66, 48, 27, 0.14);
  --shadow-soft: 0 14px 30px rgba(66, 48, 27, 0.08);
  --radius-lg: 28px;
  --radius-md: 20px;
  --radius-sm: 14px;
  --shell: 1180px;
  --font-display: "Noto Serif TC", "Songti TC", "PMingLiU", serif;
  --font-body: "Manrope", "Avenir Next", "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  font-family: var(--font-body);
  line-height: 1.6;
  background:
    radial-gradient(circle at top left, rgba(196, 112, 87, 0.16), transparent 34%),
    radial-gradient(
      circle at top right,
      rgba(102, 130, 115, 0.16),
      transparent 28%
    ),
    linear-gradient(180deg, #fffaf4 0%, var(--canvas) 44%, #f3ebe2 100%);
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background:
    linear-gradient(rgba(255, 255, 255, 0.34), rgba(255, 255, 255, 0.34)),
    repeating-linear-gradient(
      90deg,
      rgba(27, 24, 20, 0.02) 0 1px,
      transparent 1px 48px
    ),
    repeating-linear-gradient(
      180deg,
      rgba(27, 24, 20, 0.02) 0 1px,
      transparent 1px 48px
    );
}

a {
  color: inherit;
}

button,
input,
textarea,
select {
  font: inherit;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  border-bottom: 1px solid rgba(27, 24, 20, 0.08);
  background: rgba(255, 250, 244, 0.82);
  backdrop-filter: blur(18px);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  min-height: 76px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--navy);
  color: #fff;
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  box-shadow: 0 10px 20px rgba(22, 26, 34, 0.25);
}

.brand-name {
  font-size: 1.02rem;
  font-weight: 800;
  letter-spacing: 0.01em;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 20px;
  color: var(--ink-soft);
  font-size: 0.94rem;
}

.nav-links a,
.nav-cta,
.button,
.copy-link a {
  text-decoration: none;
}

.nav-links a {
  position: relative;
  padding-bottom: 4px;
}

.nav-links a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 1px;
  background: var(--coral);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 180ms ease;
}

.nav-links a:hover::after,
.nav-links a:focus-visible::after {
  transform: scaleX(1);
}

.nav-cta,
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 22px;
  border-radius: 999px;
  font-weight: 800;
  transition:
    transform 180ms ease,
    background 180ms ease,
    border-color 180ms ease,
    box-shadow 180ms ease;
}

.button:hover,
.button:focus-visible,
.nav-cta:hover,
.nav-cta:focus-visible {
  transform: translateY(-1px);
}

.nav-cta {
  padding: 0 18px;
  background: var(--navy);
  color: #fff;
  box-shadow: var(--shadow-soft);
}

.primary-button {
  background: var(--coral);
  color: #fffaf6;
  box-shadow: 0 16px 28px rgba(159, 86, 65, 0.22);
}

.primary-button:hover,
.primary-button:focus-visible {
  background: var(--coral-deep);
}

.secondary-button {
  border: 1px solid rgba(27, 24, 20, 0.12);
  background: rgba(255, 255, 255, 0.72);
  color: var(--ink);
  box-shadow: var(--shadow-soft);
}

.secondary-button:hover,
.secondary-button:focus-visible {
  border-color: rgba(196, 112, 87, 0.5);
}

.dark-secondary-button {
  border: 1px solid rgba(255, 255, 255, 0.18);
  background: rgba(255, 255, 255, 0.08);
  color: #fffaf4;
}

.dark-secondary-button:hover,
.dark-secondary-button:focus-visible {
  background: rgba(255, 255, 255, 0.14);
}

.brand:focus-visible,
.nav-links a:focus-visible,
.nav-cta:focus-visible,
.button:focus-visible,
.tab-button:focus-visible {
  outline: 2px solid rgba(196, 112, 87, 0.56);
  outline-offset: 3px;
}

.hero {
  position: relative;
  overflow: hidden;
  padding: clamp(56px, 8vw, 96px) 0 36px;
}

.hero::before {
  content: "";
  position: absolute;
  top: 40px;
  right: -120px;
  width: min(36vw, 480px);
  height: min(36vw, 480px);
  border-radius: 50%;
  background: radial-gradient(circle, rgba(102, 130, 115, 0.18), transparent 62%);
  filter: blur(6px);
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(380px, 1.05fr);
  gap: clamp(36px, 6vw, 80px);
  align-items: center;
}

.hero-copy {
  position: relative;
  z-index: 1;
}

.eyebrow {
  margin: 0 0 16px;
  color: var(--coral-deep);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

h1,
h2,
h3,
h4,
p {
  margin-top: 0;
}

h1,
.section-heading h2,
.story-copy h2,
.guardrail-panel h2,
.cta-panel h2,
.board-card h3,
.proof-grid h2,
.panel-intro h3,
.mission-card h3 {
  font-family: var(--font-display);
  letter-spacing: 0;
}

h1 {
  max-width: 8.4em;
  margin-bottom: 22px;
  font-size: clamp(2.95rem, 6.8vw, 5.15rem);
  line-height: 1;
  text-wrap: balance;
}

.hero-lede {
  max-width: 650px;
  margin-bottom: 16px;
  color: var(--navy);
  font-size: clamp(1.32rem, 2.4vw, 1.92rem);
  font-weight: 700;
  line-height: 1.28;
}

.hero-body,
.section-heading p,
.story-copy p,
.story-stack p,
.token-card p,
.trait-card p,
.harness-card p,
.workflow-step p,
.mission-card p,
.copy-card p,
.guardrail-list,
.cta-panel p,
.site-footer span {
  color: var(--ink-soft);
}

.hero-body {
  max-width: 680px;
  font-size: 1.04rem;
}

.hero-actions,
.cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.hero-signals {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
}

.hero-signals li {
  padding: 12px 16px;
  border: 1px solid rgba(27, 24, 20, 0.09);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.62);
  box-shadow: var(--shadow-soft);
  font-size: 0.92rem;
  font-weight: 700;
}

.hero-board {
  position: relative;
  margin: 0;
  padding: 24px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-lg);
  background: linear-gradient(160deg, #20283a 0%, #171d2a 55%, #111722 100%);
  color: #fffaf4;
  box-shadow: 0 28px 70px rgba(19, 23, 33, 0.34);
}

.hero-board::after {
  content: "";
  position: absolute;
  inset: 1px;
  border-radius: calc(var(--radius-lg) - 1px);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.06);
  pointer-events: none;
}

.board-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 20px;
}

.window-dots {
  display: flex;
  gap: 8px;
}

.window-dots span {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.42);
}

.board-kicker,
.mini-label,
.panel-label,
.mission-tag,
.harness-kicker,
.copy-card span,
.trait-card span,
.proof-grid span {
  font-size: 0.74rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.board-kicker,
.mini-label {
  color: rgba(255, 250, 244, 0.7);
}

.board-thread,
.board-card,
.board-footer {
  position: relative;
  border: 1px solid rgba(255, 255, 255, 0.11);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.06);
  backdrop-filter: blur(10px);
}

.board-thread {
  padding: 22px;
}

.board-thread p {
  margin: 12px 0 0;
  font-size: 1.18rem;
  font-weight: 700;
  line-height: 1.38;
}

.board-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin-top: 14px;
}

.board-card {
  min-height: 190px;
  padding: 20px;
}

.board-card h3 {
  margin: 12px 0 10px;
  font-size: 1.58rem;
  line-height: 1.04;
}

.board-card p,
.board-card li {
  margin-bottom: 0;
  color: rgba(255, 250, 244, 0.82);
  font-size: 0.95rem;
}

.board-card ul {
  margin: 12px 0 0;
  padding-left: 18px;
}

.board-card li + li {
  margin-top: 10px;
}

.board-card.is-accent {
  background: linear-gradient(
    140deg,
    rgba(196, 112, 87, 0.22),
    rgba(196, 112, 87, 0.08)
  );
}

.board-card.is-dark {
  background: rgba(7, 10, 18, 0.42);
}

.status-stack {
  display: grid;
  gap: 10px;
  margin-top: 14px;
}

.status-chip {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 14px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
  font-size: 0.92rem;
  font-weight: 700;
}

.status-chip::before {
  content: "";
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: #89dfa4;
}

.status-chip.is-neutral::before {
  background: var(--gold);
}

.board-footer {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 16px;
  margin-top: 14px;
  padding: 18px 20px;
  font-size: 0.9rem;
}

.board-footer span {
  color: rgba(255, 250, 244, 0.72);
}

.board-footer strong {
  font-size: 0.98rem;
  overflow-wrap: anywhere;
}

.proof-band {
  padding: 22px 0 48px;
}

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

.proof-grid article,
.story-stack article,
.token-card,
.trait-card,
.harness-card,
.workflow-step,
.mission-card,
.copy-card {
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.78);
  box-shadow: var(--shadow-soft);
}

.proof-grid article {
  padding: 28px;
}

.proof-grid span {
  color: var(--sage);
}

.proof-grid h2 {
  margin: 10px 0 10px;
  font-size: 1.9rem;
  line-height: 1.04;
}

.section {
  padding: clamp(68px, 9vw, 112px) 0;
}

.section-heading {
  max-width: 760px;
  margin: 0 auto 40px;
  text-align: center;
}

.left-heading {
  margin: 0;
  text-align: left;
}

.section-heading h2,
.story-copy h2,
.guardrail-panel h2,
.cta-panel h2 {
  margin-bottom: 16px;
  font-size: clamp(2.48rem, 5vw, 4.45rem);
  line-height: 0.96;
}

.section-heading p {
  font-size: 1.05rem;
}

.story-section {
  position: relative;
}

.story-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.98fr) minmax(360px, 1.02fr);
  gap: clamp(32px, 6vw, 82px);
  align-items: start;
}

.story-quote {
  margin-top: 28px;
  padding: 24px;
  border: 1px solid rgba(196, 112, 87, 0.2);
  border-radius: var(--radius-md);
  background: linear-gradient(
    135deg,
    rgba(196, 112, 87, 0.1),
    rgba(102, 130, 115, 0.1)
  );
}

.story-quote p {
  margin: 0 0 10px;
  color: var(--ink);
  font-size: 1.26rem;
  font-weight: 700;
}

.story-quote span {
  color: var(--muted);
  font-size: 0.95rem;
}

.story-stack {
  display: grid;
  gap: 14px;
}

.story-stack article {
  padding: 24px;
}

.story-stack span {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: var(--navy);
  color: #fffaf4;
  font-weight: 800;
}

.story-stack h3 {
  margin: 16px 0 10px;
  font-size: 1.42rem;
  line-height: 1.12;
}

.layers-section {
  padding-top: 0;
}

.tabs {
  padding: 22px;
  border: 1px solid rgba(27, 24, 20, 0.08);
  border-radius: calc(var(--radius-lg) + 2px);
  background: rgba(255, 255, 255, 0.64);
  box-shadow: var(--shadow);
}

.tab-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 22px;
}

.tab-button {
  padding: 14px 18px;
  border: 1px solid rgba(27, 24, 20, 0.08);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.72);
  color: var(--ink-soft);
  font-size: 0.95rem;
  font-weight: 800;
  cursor: pointer;
  transition:
    background 180ms ease,
    color 180ms ease,
    transform 180ms ease,
    box-shadow 180ms ease;
}

.tab-button:hover,
.tab-button:focus-visible {
  transform: translateY(-1px);
  box-shadow: var(--shadow-soft);
}

.tab-button.is-active {
  border-color: transparent;
  background: var(--navy);
  color: #fffaf4;
}

.tab-panel {
  display: none;
}

.tab-panel.is-active {
  display: block;
  animation: panel-in 240ms ease;
}

.panel-intro {
  max-width: 760px;
  margin-bottom: 26px;
}

.panel-label {
  display: inline-block;
  margin-bottom: 10px;
  color: var(--sage);
}

.panel-intro h3 {
  margin: 0;
  font-size: clamp(1.8rem, 3.2vw, 2.8rem);
  line-height: 1.04;
}

.token-grid,
.trait-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.token-card,
.trait-card {
  padding: 24px;
}

.token-card h4,
.trait-card h4,
.harness-card h4,
.mission-card h3 {
  margin: 14px 0 10px;
  font-size: 1.36rem;
  line-height: 1.1;
}

.trait-card span {
  color: var(--coral-deep);
}

.harness-layout {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.harness-card {
  padding: 24px;
  background: rgba(255, 255, 255, 0.86);
}

.harness-card.is-emphasis {
  background: linear-gradient(
    160deg,
    rgba(196, 112, 87, 0.12),
    rgba(255, 255, 255, 0.96)
  );
}

.harness-card.wide {
  grid-column: 1 / -1;
}

.harness-kicker {
  color: var(--sage);
}

.harness-card ul {
  margin: 16px 0 0;
  padding-left: 18px;
  color: var(--ink-soft);
}

.harness-card li + li {
  margin-top: 10px;
}

.harness-list {
  display: grid;
  gap: 14px;
  margin-top: 18px;
}

.harness-list strong {
  display: block;
  margin-bottom: 6px;
  color: var(--ink);
}

.harness-list p {
  margin: 0;
}

.workflow-section {
  background: linear-gradient(
    180deg,
    rgba(255, 255, 255, 0.32),
    rgba(255, 255, 255, 0.08)
  );
}

.workflow-track {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 16px;
}

.workflow-step {
  min-height: 292px;
  padding: 24px;
}

.workflow-step span {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--navy);
  color: #fffaf4;
  font-weight: 800;
}

.workflow-step h3 {
  margin: 18px 0 10px;
  font-size: 1.34rem;
  line-height: 1.12;
}

.missions-section {
  background: #fbf6ef;
}

.missions-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(380px, 1.08fr);
  gap: clamp(32px, 6vw, 82px);
  align-items: start;
}

.missions-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.mission-card {
  padding: 24px;
}

.mission-tag {
  display: inline-flex;
  padding: 8px 12px;
  border-radius: 999px;
  background: var(--sage-soft);
  color: var(--sage);
}

.mission-card p {
  margin-bottom: 0;
}

.copy-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.copy-card {
  padding: 24px;
  background: rgba(255, 255, 255, 0.84);
}

.copy-card span {
  color: var(--coral-deep);
}

.copy-card p {
  margin: 12px 0 0;
  color: var(--ink);
  font-size: 1.18rem;
  font-weight: 700;
  line-height: 1.42;
}

.copy-link {
  margin: 24px 0 0;
  text-align: center;
  color: var(--ink-soft);
}

.copy-link a {
  color: var(--navy);
  font-weight: 800;
  text-underline-offset: 0.15em;
}

.guardrail-section {
  padding-top: 0;
}

.guardrail-panel {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(360px, 1.05fr);
  gap: 32px;
  align-items: start;
  padding: clamp(30px, 5vw, 48px);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-lg);
  background: linear-gradient(145deg, #1a2130 0%, #131823 100%);
  color: #fffaf4;
  box-shadow: 0 24px 60px rgba(16, 20, 30, 0.3);
}

.guardrail-panel .eyebrow {
  color: #ffd7b7;
}

.guardrail-panel h2 {
  color: #fffaf4;
}

.guardrail-list {
  margin: 0;
  padding-left: 20px;
  color: rgba(255, 250, 244, 0.76);
}

.guardrail-list li + li {
  margin-top: 12px;
}

.cta-section {
  padding-top: 0;
}

.cta-panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 28px;
  align-items: center;
  padding: clamp(30px, 5vw, 48px);
  border-radius: var(--radius-lg);
  background: linear-gradient(
    135deg,
    rgba(196, 112, 87, 0.95),
    rgba(159, 86, 65, 0.98) 55%,
    #663427 100%
  );
  color: #fffaf4;
  box-shadow: 0 24px 60px rgba(124, 69, 52, 0.28);
}

.cta-panel .eyebrow {
  color: #ffe7d8;
}

.cta-panel p {
  color: rgba(255, 250, 244, 0.82);
}

.cta-actions {
  flex-direction: column;
  margin-top: 0;
}

.site-footer {
  padding: 26px 0 44px;
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: flex-start;
  gap: 12px 18px;
  font-size: 0.92rem;
}

.site-footer p,
.footer-copy p {
  margin: 0;
  font-weight: 800;
}

.footer-copy {
  display: grid;
  gap: 6px;
  max-width: 720px;
}

.footer-copy a {
  color: var(--navy);
  text-underline-offset: 0.18em;
}

.footer-credit {
  color: var(--muted);
}

.hero-copy > *,
.hero-board,
.proof-grid article,
.story-stack article,
.mission-card,
.copy-card {
  animation: rise-in 720ms both;
}

.hero-copy h1 {
  animation-delay: 60ms;
}

.hero-copy .hero-lede {
  animation-delay: 120ms;
}

.hero-copy .hero-body {
  animation-delay: 180ms;
}

.hero-copy .hero-actions {
  animation-delay: 240ms;
}

.hero-copy .hero-signals {
  animation-delay: 300ms;
}

.hero-board {
  animation-delay: 160ms;
}

@keyframes rise-in {
  from {
    opacity: 0;
    transform: translateY(18px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes panel-in {
  from {
    opacity: 0;
    transform: translateY(10px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 1100px) {
  .hero-grid,
  .story-layout,
  .missions-layout,
  .guardrail-panel,
  .cta-panel {
    grid-template-columns: 1fr;
  }

  .proof-grid,
  .workflow-track,
  .missions-grid,
  .copy-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .cta-actions {
    flex-direction: row;
  }
}

@media (max-width: 860px) {
  .site-header {
    position: static;
  }

  .header-inner {
    min-height: auto;
    padding: 16px 0;
  }

  .nav-links,
  .nav-cta {
    display: none;
  }

  .shell {
    width: min(var(--shell), calc(100% - 28px));
  }

  .hero {
    padding-top: 32px;
  }

  h1 {
    max-width: none;
    font-size: clamp(2.7rem, 12vw, 4rem);
  }

  .hero-grid,
  .board-grid,
  .token-grid,
  .trait-grid,
  .harness-layout,
  .proof-grid,
  .workflow-track,
  .missions-grid,
  .copy-grid {
    grid-template-columns: 1fr;
  }

  .board-card,
  .workflow-step {
    min-height: auto;
  }

  .tabs {
    padding: 18px;
  }

  .section-heading h2,
  .story-copy h2,
  .guardrail-panel h2,
  .cta-panel h2 {
    font-size: clamp(2.16rem, 10vw, 3.4rem);
  }

  .button,
  .hero-actions,
  .cta-actions {
    width: 100%;
  }

  .cta-actions {
    flex-direction: column;
  }

  .board-footer {
    flex-direction: column;
    align-items: flex-start;
  }
}

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

  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }
}