:root {
  --teal: #048c82;
  --charcoal: #17242a;
  --white: #ffffff;
  --dark: #091b20;
  --muted: rgba(255, 255, 255, 0.62);
  --line: rgba(4, 140, 130, 0.32);
  --text: #ffffff;
  --serif: "Noto Serif SC", "Songti SC", "STSong", serif;
  --sans: "Noto Sans SC", "Source Sans 3", "PingFang SC", "Hiragino Sans GB", sans-serif;
  --en: "Source Sans 3", "Noto Sans SC", sans-serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--dark);
  color: var(--text);
  font-family: var(--sans);
  font-weight: 400;
  line-height: 1.7;
  letter-spacing: 0.02em;
}

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

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

.skip-link {
  position: absolute;
  left: 1rem;
  top: -3rem;
  background: var(--teal);
  color: var(--white);
  padding: 0.5rem 0.8rem;
  z-index: 20;
}

.skip-link:focus {
  top: 1rem;
}

.wrap {
  width: min(1080px, calc(100% - 3rem));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: var(--dark);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  width: min(1080px, calc(100% - 3rem));
  margin: 0 auto;
  min-height: 80px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.25rem;
}

.brand img {
  width: min(186px, 42vw);
  height: auto;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 1.75rem;
}

.nav,
.lang {
  display: flex;
  align-items: center;
  gap: 1.75rem;
  font-size: 0.92rem;
  letter-spacing: 0.12em;
}

.nav a,
.lang a {
  color: var(--muted);
}

.nav a:hover,
.nav a:focus-visible,
.lang a:hover,
.lang a:focus-visible {
  color: var(--white);
}

.lang {
  gap: 0.65rem;
  padding-left: 1.25rem;
  border-left: 1px solid var(--line);
}

.lang a[aria-current="page"] {
  color: var(--white);
}

.hero {
  min-height: calc(100vh - 72px);
  display: grid;
  place-items: center;
  padding: 4rem 1.5rem 5rem;
  border-bottom: 1px solid var(--line);
}

.hero-inner {
  text-align: center;
  max-width: 820px;
}

.hero-mark {
  width: min(220px, 46vw);
  height: auto;
  margin: 0 auto 2.5rem;
}

.eyebrow,
.kicker,
.status,
.hero-sub,
.footer-meta,
figcaption,
.swatch code,
.swatch span,
.pillar-en {
  font-family: var(--en);
}

.eyebrow {
  margin: 0 0 1.25rem;
  color: var(--teal);
  letter-spacing: 0.28em;
  text-transform: none;
  font-size: 0.95rem;
}

.hero h1 {
  margin: 0;
  font-family: var(--serif);
  font-weight: 600;
  font-size: clamp(3.4rem, 11vw, 7rem);
  line-height: 1.08;
  letter-spacing: 0.28em;
  text-indent: 0.28em;
}

.hero-sub {
  margin: 1.25rem 0 0;
  color: var(--muted);
  font-size: 1.05rem;
  letter-spacing: 0.16em;
  font-style: italic;
}

.status {
  display: inline-block;
  margin-top: 2.4rem;
  padding: 0.35rem 0.85rem;
  border: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.78rem;
  letter-spacing: 0.22em;
}

.section {
  padding: 7rem 0;
  border-bottom: 1px solid var(--line);
}

.section-head {
  max-width: 640px;
  margin-bottom: 3.5rem;
}

.kicker {
  margin: 0 0 0.8rem;
  color: var(--teal);
  font-size: 0.8rem;
  letter-spacing: 0.28em;
}

.section h2 {
  margin: 0 0 1rem;
  font-family: var(--serif);
  font-size: clamp(2rem, 4vw, 2.8rem);
  font-weight: 600;
  letter-spacing: 0.08em;
  line-height: 1.25;
}

.lead {
  margin: 0;
  color: var(--muted);
  font-size: 1.05rem;
}

.meaning {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: 2.5rem 0;
  margin-bottom: 3.5rem;
}

.meaning blockquote {
  margin: 0;
}

.meaning p {
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(1.35rem, 3vw, 1.85rem);
  line-height: 1.7;
  letter-spacing: 0.08em;
}

.meaning p + p {
  margin-top: 0.35rem;
}

.pillars {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}

.pillars li {
  padding-top: 1.25rem;
  border-top: 1px solid var(--line);
}

.pillar-zh {
  display: block;
  font-family: var(--serif);
  font-size: 2rem;
  letter-spacing: 0.12em;
}

.pillar-en {
  display: block;
  margin: 0.2rem 0 0.8rem;
  color: var(--teal);
  font-size: 0.78rem;
  letter-spacing: 0.18em;
}

.pillars p {
  margin: 0;
  color: var(--muted);
}

.lockup {
  margin: 0;
}

.lockup-wide {
  padding: 2.5rem 2rem;
  margin-bottom: 1.5rem;
}

.lockup-wide img {
  width: min(720px, 100%);
  margin: 0 auto;
}

.lockup-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.lockup img {
  margin: 0 auto;
}

.lockup-grid img {
  width: min(220px, 70%);
}

.card-light {
  background: var(--white);
  padding: 2rem 1.5rem 1.25rem;
}

.card-light figcaption {
  margin-top: 1.25rem;
  color: var(--charcoal);
  text-align: center;
  font-size: 0.8rem;
  letter-spacing: 0.12em;
}

.swatches {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.25rem;
}

.swatch {
  border: 1px solid var(--line);
  padding: 1rem 1rem 1.15rem;
}

.swatch-chip {
  display: block;
  height: 92px;
  margin-bottom: 1rem;
  border: 1px solid var(--line);
}

.swatch strong {
  display: block;
  font-weight: 500;
}

.swatch code,
.swatch span {
  display: block;
  color: var(--muted);
  font-size: 0.82rem;
}

.swatch code {
  margin: 0.3rem 0 0.15rem;
  font-family: var(--en);
}

.site-footer {
  padding: 4.5rem 0 3.5rem;
}

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

.footer-inner img {
  width: min(280px, 70%);
  margin: 0 auto 1.5rem;
}

.footer-slogan {
  margin: 0 0 0.6rem;
  font-family: var(--serif);
  letter-spacing: 0.28em;
  text-indent: 0.28em;
}

.footer-meta {
  margin: 0;
  color: var(--muted);
  font-size: 0.82rem;
  letter-spacing: 0.08em;
}

.reveal {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: no-preference) {
  .reveal {
    opacity: 0;
    transform: translateY(16px);
    transition: opacity 0.7s ease, transform 0.7s ease;
  }

  .reveal.is-in {
    opacity: 1;
    transform: none;
  }

  .hero .reveal {
    transition-delay: 0.08s;
  }
}

@media (max-width: 860px) {
  .pillars,
  .lockup-grid,
  .swatches {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 560px) {
  .wrap,
  .header-inner {
    width: calc(100% - 2rem);
  }

  .header-actions {
    gap: 0.85rem;
  }

  .nav,
  .lang {
    gap: 0.75rem;
    font-size: 0.82rem;
  }

  .lang {
    padding-left: 0.75rem;
  }

  .section {
    padding: 4.5rem 0;
  }

  .pillars,
  .lockup-grid,
  .swatches {
    grid-template-columns: 1fr;
  }

  .hero h1 {
    letter-spacing: 0.16em;
    text-indent: 0.16em;
  }
}