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

html {
  background: var(--paper);
  color: var(--ink);
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-height);
  scrollbar-color: var(--ink-soft) transparent;
  scrollbar-width: thin;
}

body {
  margin: 0;
  min-width: 320px;
  overflow-x: clip;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.72;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

body.menu-open {
  overflow: hidden;
}

body::before {
  position: fixed;
  inset: 0;
  z-index: 1000;
  pointer-events: none;
  content: "";
  opacity: 0.045;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 180 180' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.88' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.65'/%3E%3C/svg%3E");
}

::selection {
  color: var(--paper);
  background: var(--terracotta);
}

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

button,
a {
  color: inherit;
}

a {
  text-decoration-thickness: 1px;
  text-underline-offset: 0.25em;
}

button {
  font: inherit;
}

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

h1,
h2,
h3,
h4 {
  text-wrap: balance;
}

p {
  text-wrap: pretty;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: fixed;
  top: 0.75rem;
  left: 0.75rem;
  z-index: 2000;
  padding: 0.7rem 1rem;
  color: var(--paper);
  background: var(--ink);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  transform: translateY(-160%);
  transition: transform 180ms ease;
}

.skip-link:focus {
  transform: translateY(0);
}

:focus-visible {
  outline: 1px solid var(--terracotta);
  outline-offset: 5px;
  box-shadow: var(--focus-ring);
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 900;
  display: grid;
  grid-template-columns: minmax(150px, 1fr) auto minmax(150px, 1fr);
  align-items: center;
  min-height: var(--header-height);
  padding: 0 var(--gutter);
  border-bottom: 1px solid var(--line);
  background: color-mix(in oklch, var(--paper) 86%, transparent);
  backdrop-filter: blur(18px) saturate(115%);
  transition: min-height 240ms ease, background 240ms ease;
}

.site-header.is-scrolled {
  min-height: 62px;
  background: color-mix(in oklch, var(--paper) 94%, transparent);
}

.brand-mark {
  justify-self: start;
  width: 118px;
}

.brand-mark img {
  width: 100%;
  height: auto;
}

.desktop-nav {
  display: flex;
  align-items: center;
  gap: clamp(1rem, 2.1vw, 2.3rem);
}

.desktop-nav a,
.language-note {
  position: relative;
  color: var(--ink-soft);
  font-family: var(--font-mono);
  font-size: 0.63rem;
  font-weight: 500;
  letter-spacing: 0.045em;
  text-decoration: none;
  text-transform: uppercase;
}

.desktop-nav a::after {
  position: absolute;
  left: 0;
  right: 100%;
  bottom: -0.5rem;
  height: 1px;
  content: "";
  background: var(--terracotta);
  transition: right 200ms ease;
}

.desktop-nav a:hover::after,
.desktop-nav a.is-active::after {
  right: 0;
}

.desktop-nav a.is-active {
  color: var(--ink);
}

.header-actions {
  display: flex;
  align-items: center;
  justify-self: end;
  gap: 1rem;
}

.menu-toggle {
  display: none;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 1px solid var(--line);
  background: transparent;
  cursor: pointer;
}

.menu-toggle span:not(.sr-only) {
  display: block;
  width: 17px;
  height: 1px;
  margin: 4px auto;
  background: var(--ink);
  transition: transform 200ms ease;
}

.menu-toggle[aria-expanded="true"] span:nth-of-type(2) {
  transform: translateY(2.5px) rotate(45deg);
}

.menu-toggle[aria-expanded="true"] span:nth-of-type(3) {
  transform: translateY(-2.5px) rotate(-45deg);
}

.mobile-nav {
  position: fixed;
  inset: var(--header-height) 0 0;
  z-index: -1;
  display: none;
  padding: 2rem var(--gutter) 4rem;
  overflow-y: auto;
  background: var(--paper);
  opacity: 0;
  pointer-events: none;
  transform: translateY(-1rem);
  transition: opacity 200ms ease, transform 200ms ease;
}

.mobile-nav.is-open {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

.mobile-nav a {
  display: grid;
  grid-template-columns: 2.5rem 1fr;
  align-items: baseline;
  padding: 1.15rem 0;
  border-bottom: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-decoration: none;
}

.mobile-nav a span {
  font-family: var(--font-display-zh);
  font-size: clamp(1.65rem, 8vw, 3rem);
}

.section {
  position: relative;
}

.section-frame {
  width: min(100%, var(--content-max));
  margin: 0 auto;
  padding-left: var(--gutter);
  padding-right: var(--gutter);
}

.section--paper-alt {
  background: var(--paper-alt);
}

.section--ink {
  color: var(--paper);
  background: var(--ink);
}

.section-heading {
  display: grid;
  grid-template-columns: minmax(130px, 0.7fr) minmax(0, 3.3fr);
  gap: clamp(1.5rem, 4vw, 5rem);
  align-items: start;
}

.section-heading--split {
  grid-template-columns: minmax(130px, 0.7fr) minmax(320px, 2.25fr) minmax(230px, 1.05fr);
}

.section-index {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1.25rem;
  padding-top: 0.75rem;
  border-top: 1px solid currentColor;
  font-family: var(--font-mono);
  font-size: 0.67rem;
  letter-spacing: 0.06em;
}

.section-index span:first-child {
  color: var(--terracotta);
  font-size: 0.82rem;
}

.section-eyebrow {
  margin-bottom: 1.15rem;
  color: var(--terracotta);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.12em;
}

.section-heading h2,
.recognition-title h2,
.contact-statement h2 {
  font-family: var(--font-display-zh);
  font-size: clamp(2.5rem, 5.5vw, 6.3rem);
  font-weight: 400;
  letter-spacing: -0.045em;
  line-height: 1.08;
}

.section-intro {
  align-self: end;
  max-width: 31rem;
  color: var(--muted);
  font-size: clamp(0.95rem, 1.1vw, 1.12rem);
}

.section--ink .section-intro {
  color: var(--paper-muted);
}

.text-link,
.text-button,
.contact-mail {
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.4rem;
  min-height: 44px;
  padding: 0 0.15rem 0.35rem;
  border: 0;
  border-bottom: 1px solid currentColor;
  background: transparent;
  font-family: var(--font-mono);
  font-size: 0.71rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-decoration: none;
  text-transform: uppercase;
  cursor: pointer;
  transition: color 180ms ease, border-color 180ms ease;
}

.text-link:hover,
.text-button:hover,
.contact-mail:hover {
  color: var(--terracotta);
}

.text-link--strong {
  color: var(--terracotta-deep);
}

.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 700ms cubic-bezier(0.22, 1, 0.36, 1), transform 700ms cubic-bezier(0.22, 1, 0.36, 1);
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.noscript-note {
  position: fixed;
  left: 1rem;
  right: 1rem;
  bottom: 1rem;
  z-index: 1500;
  padding: 1rem;
  color: var(--paper);
  background: var(--terracotta-deep);
  text-align: center;
}

.copy-toast {
  position: fixed;
  left: 50%;
  bottom: 2rem;
  z-index: 1200;
  padding: 0.7rem 1rem;
  color: var(--paper);
  background: var(--ink);
  border: 1px solid var(--paper-line);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  opacity: 0;
  pointer-events: none;
  transform: translate(-50%, 0.75rem);
  transition: opacity 180ms ease, transform 180ms ease;
}

.copy-toast.is-visible {
  opacity: 1;
  transform: translate(-50%, 0);
}