:root {
  --ink: #17140f;
  --paper: #f7f1e5;
  --paper-2: #fff9ee;
  --mist: #e6dece;
  --line: rgba(23, 20, 15, 0.18);
  --carbon: #202328;
  --cyan: #00a7b5;
  --lime: #a5c700;
  --tomato: #ec4b32;
  --gold: #f4b83e;
  --blue: #3b6eea;
  --violet: #8f5cff;
  --shadow: 0 24px 70px rgba(23, 20, 15, 0.16);
  --mono: 'IBM Plex Mono', 'SFMono-Regular', Consolas, monospace;
  --body: 'Public Sans', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
  --display: 'Fraunces', 'Songti SC', 'Noto Serif CJK SC', Georgia, serif;
}

* {
  box-sizing: border-box;
}

html {
  background: var(--paper);
  color: var(--ink);
  overflow-x: clip;
  scroll-behavior: smooth;
}

body {
  min-width: 320px;
  margin: 0;
  overflow-x: clip;
  color: var(--ink);
  font-family: var(--body);
  background:
    linear-gradient(90deg, rgba(23, 20, 15, 0.04) 1px, transparent 1px) 0 0 / 28px 28px,
    linear-gradient(rgba(23, 20, 15, 0.035) 1px, transparent 1px) 0 0 / 28px 28px,
    var(--paper);
}

body::before {
  position: fixed;
  inset: 0;
  z-index: 50;
  pointer-events: none;
  content: '';
  opacity: 0.3;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 160 160' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.95' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.35'/%3E%3C/svg%3E");
  mix-blend-mode: multiply;
}

a {
  color: inherit;
}

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

.site-shell {
  position: relative;
  overflow: hidden;
}

.topbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 16px clamp(18px, 4vw, 44px);
  border-bottom: 1px solid rgba(23, 20, 15, 0.16);
  background: rgba(247, 241, 229, 0.78);
  -webkit-backdrop-filter: blur(18px);
  backdrop-filter: blur(18px);
}

.brand-lockup {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0;
  text-transform: uppercase;
}

.brand-mark {
  display: grid;
  width: 28px;
  height: 28px;
  place-items: center;
  border: 1px solid var(--ink);
  background: var(--gold);
  box-shadow: 3px 3px 0 var(--ink);
}

.brand-mark span {
  transform: rotate(-8deg);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: clamp(8px, 2vw, 18px);
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 600;
}

.nav-links a {
  padding: 8px 0;
  text-decoration-thickness: 2px;
  text-underline-offset: 5px;
}

.nav-cluster {
  display: flex;
  align-items: center;
  gap: clamp(12px, 2vw, 22px);
}

.mobile-top-links {
  display: none;
}

.mobile-language-switch {
  display: none;
}

.language-switch {
  display: inline-grid;
  grid-template-columns: 1fr 1fr;
  gap: 2px;
  padding: 3px;
  border: 1px solid var(--ink);
  border-radius: 8px;
  background: rgba(255, 249, 238, 0.78);
  box-shadow: 3px 3px 0 var(--ink);
  font-family: var(--mono);
}

.lang-option {
  min-width: 38px;
  height: 28px;
  padding: 0 8px;
  border: 0;
  border-radius: 5px;
  color: var(--ink);
  background: transparent;
  font: inherit;
  font-size: 11px;
  font-weight: 800;
  cursor: pointer;
}

.lang-option.is-active {
  color: var(--paper-2);
  background: var(--ink);
}

.icon-link {
  display: inline-grid;
  width: 36px;
  height: 36px;
  flex: 0 0 auto;
  place-items: center;
  border: 1px solid var(--ink);
  border-radius: 8px;
  color: var(--paper-2);
  background: var(--ink);
  box-shadow: 3px 3px 0 var(--ink);
  text-decoration: none;
  transition:
    transform 160ms ease,
    box-shadow 160ms ease,
    background 160ms ease,
    color 160ms ease;
}

.icon-link:hover,
.icon-link:focus-visible {
  color: var(--ink);
  background: var(--gold);
  transform: translate(-2px, -2px);
  box-shadow: 5px 5px 0 var(--ink);
}

.icon-link svg {
  width: 19px;
  height: 19px;
  fill: currentColor;
}

html[lang='zh'] .hero-copy p,
html[lang='zh'] .split-heading p,
html[lang='zh'] .project-body .description,
html[lang='zh'] .timeline-item p {
  line-height: 1.72;
}

.hero {
  position: relative;
  min-height: 92vh;
  display: grid;
  align-items: end;
  padding: 120px clamp(18px, 4vw, 56px) 44px;
  isolation: isolate;
}

.hero-stage {
  position: absolute;
  inset: 0;
  overflow: hidden;
  background:
    radial-gradient(circle at 18% 20%, rgba(244, 184, 62, 0.22), transparent 24%),
    radial-gradient(circle at 90% 72%, rgba(0, 167, 181, 0.18), transparent 25%),
    linear-gradient(135deg, rgba(255, 249, 238, 0.96), rgba(247, 241, 229, 0.8));
  z-index: -2;
}

#signalCanvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0.85;
}

.orbital-strip {
  position: absolute;
  top: 19vh;
  left: -8vw;
  right: -8vw;
  display: grid;
  grid-template-columns: repeat(6, minmax(160px, 1fr));
  gap: 12px;
  transform: rotate(-6deg);
  opacity: 0.9;
}

.signal-tile {
  min-height: 92px;
  padding: 14px;
  border: 1px solid rgba(23, 20, 15, 0.3);
  background: rgba(255, 249, 238, 0.74);
  box-shadow: 8px 8px 0 rgba(23, 20, 15, 0.14);
  font-family: var(--mono);
}

.signal-tile b {
  display: block;
  margin-bottom: 18px;
  font-size: 13px;
}

.signal-tile span {
  font-size: 11px;
  color: rgba(23, 20, 15, 0.68);
}

.signal-tile:nth-child(2n) {
  transform: translateY(38px);
  background: rgba(228, 247, 246, 0.72);
}

.signal-tile:nth-child(3n) {
  background: rgba(255, 236, 206, 0.8);
}

.hero-grid {
  width: min(1240px, 100%);
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(34px, 6vw, 72px);
}

.hero-kicker {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  width: fit-content;
  max-width: 100%;
  padding: 8px 10px;
  border: 1px solid var(--ink);
  background: var(--paper-2);
  box-shadow: 4px 4px 0 var(--ink);
  font-family: var(--mono);
  font-size: clamp(11px, 2.8vw, 13px);
  font-weight: 700;
  text-transform: uppercase;
}

.status-dot {
  width: 10px;
  height: 10px;
  border: 1px solid var(--ink);
  background: var(--lime);
  animation: pulse 1.7s steps(2, jump-none) infinite;
}

.hero h1 {
  max-width: 11ch;
  margin: 22px 0 0;
  font-family: var(--display);
  font-size: clamp(74px, 17vw, 220px);
  line-height: 0.78;
  letter-spacing: 0;
  text-wrap: balance;
}

.hero-copy {
  display: grid;
  grid-template-columns: minmax(0, 0.82fr) minmax(260px, 0.38fr);
  gap: clamp(20px, 4vw, 48px);
  align-items: end;
  margin-top: 28px;
}

.hero-copy p {
  max-width: 760px;
  margin: 0;
  font-size: clamp(21px, 3.2vw, 42px);
  font-weight: 800;
  line-height: 1.02;
  overflow-wrap: anywhere;
  text-wrap: balance;
}

.hero-copy p em {
  color: var(--cyan);
  font-style: normal;
}

.role-plate {
  display: grid;
  gap: 8px;
  justify-self: end;
  width: min(100%, 390px);
  padding: 16px;
  border: 1px solid var(--ink);
  border-radius: 8px;
  background: rgba(255, 249, 238, 0.88);
  box-shadow: 7px 7px 0 var(--ink);
  font-family: var(--mono);
}

.role-plate strong {
  font-size: 13px;
  text-transform: uppercase;
}

.role-plate a {
  width: fit-content;
  font-weight: 700;
  text-decoration-color: var(--tomato);
  text-decoration-thickness: 2px;
  text-underline-offset: 4px;
}

.scroll-marker {
  position: absolute;
  left: clamp(18px, 4vw, 56px);
  bottom: 12px;
  display: flex;
  align-items: center;
  gap: 10px;
  color: rgba(23, 20, 15, 0.68);
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
}

.scroll-marker::before {
  width: 34px;
  height: 2px;
  content: '';
  background: var(--tomato);
}

.section {
  padding: clamp(70px, 11vw, 138px) clamp(18px, 4vw, 56px);
}

.section-inner {
  width: min(1240px, 100%);
  margin: 0 auto;
}

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 22px;
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
}

.section-label::before {
  width: 34px;
  height: 8px;
  content: '';
  border: 1px solid var(--ink);
  background: var(--lime);
}

.split-heading {
  display: grid;
  grid-template-columns: minmax(0, 0.72fr) minmax(240px, 0.28fr);
  gap: clamp(22px, 5vw, 64px);
  align-items: end;
  margin-bottom: clamp(32px, 6vw, 66px);
}

.split-heading h2 {
  margin: 0;
  font-family: var(--display);
  font-size: clamp(43px, 8vw, 112px);
  line-height: 0.98;
  letter-spacing: 0;
  text-wrap: balance;
}

html[lang='zh'] .split-heading h2 {
  line-height: 1.16;
}

.split-heading p {
  margin: 0;
  font-size: clamp(16px, 2vw, 21px);
  font-weight: 700;
  line-height: 1.3;
}

.project-lab {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 350px), 1fr));
  gap: clamp(18px, 3vw, 30px);
}

.project-lab[hidden] {
  display: none;
}

.product-overview {
  scroll-margin-top: 92px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(12px, 2vw, 18px);
  margin: 0 0 clamp(36px, 6vw, 72px);
}

.product-tile {
  position: relative;
  min-height: 154px;
  display: grid;
  grid-template-columns: 70px minmax(0, 1fr);
  grid-template-rows: auto auto minmax(0, 1fr);
  gap: 6px 14px;
  align-items: start;
  padding: 16px 48px 16px 16px;
  overflow: hidden;
  border: 1px solid var(--ink);
  border-radius: 8px;
  color: var(--ink);
  font: inherit;
  text-align: left;
  background:
    linear-gradient(90deg, rgba(23, 20, 15, 0.045) 1px, transparent 1px) 0 0 / 22px 22px,
    var(--paper-2);
  box-shadow: 6px 6px 0 rgba(23, 20, 15, 0.14);
  appearance: none;
  cursor: pointer;
  text-decoration: none;
  transition:
    transform 180ms ease,
    box-shadow 180ms ease;
}