:root {
  --bg: #fdfdfb;
  --surface: #ffffff;
  --fg: #050505;
  --muted: #3f3f3c;
  --weak: #7a7973;
  --border: #dfddd6;
  --wash: #f1f0ec;
  --wash-2: #f8f7f3;
  --signal: #7da8b7;
  --signal-soft: rgba(125, 168, 183, 0.2);
  --inverse: #050505;
  --inverse-fg: #ffffff;
  --accent: #050505;
  --max: 1180px;
  --measure: 760px;
  --font-display: "Avenir Next", "Helvetica Neue", Helvetica, Arial, sans-serif;
  --font-body: Georgia, "Times New Roman", Times, serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  position: relative;
  margin: 0;
  color: var(--fg);
  background:
    linear-gradient(0deg, rgba(5, 5, 5, 0.018) 1px, transparent 1px) 0 0 / 72px 72px,
    linear-gradient(90deg, rgba(5, 5, 5, 0.025) 1px, transparent 1px) 0 0 / 72px 72px,
    var(--bg);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.72;
  letter-spacing: 0;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background:
    linear-gradient(118deg, transparent 0 58%, rgba(125, 168, 183, 0.07) 58% 58.15%, transparent 58.15%),
    radial-gradient(circle at 18% 22%, rgba(5, 5, 5, 0.035) 0 1px, transparent 1.5px),
    radial-gradient(circle at 78% 18%, rgba(5, 5, 5, 0.028) 0 1px, transparent 1.5px),
    radial-gradient(circle at 68% 74%, rgba(5, 5, 5, 0.026) 0 1px, transparent 1.5px);
  background-size: auto, 96px 96px, 128px 128px, 112px 112px;
}

html[lang="zh-CN"] body {
  font-family: "Songti SC", "STSong", "Noto Serif CJK SC", "Source Han Serif SC", SimSun, serif;
}

html[lang="zh-CN"] h1,
html[lang="zh-CN"] h2,
html[lang="zh-CN"] h3,
html[lang="zh-CN"] .nav,
html[lang="zh-CN"] .brand,
html[lang="zh-CN"] .eyebrow,
html[lang="zh-CN"] .button-link,
html[lang="zh-CN"] .text-link,
html[lang="zh-CN"] .section-kicker,
html[lang="zh-CN"] .section-title,
html[lang="zh-CN"] .home-index-card strong,
html[lang="zh-CN"] .page-plate figcaption,
html[lang="zh-CN"] .mark-label,
html[lang="zh-CN"] .atlas-card strong,
html[lang="zh-CN"] .identity-strip strong,
html[lang="zh-CN"] .panel-kicker,
html[lang="zh-CN"] .policy-note,
html[lang="zh-CN"] .footer-grid,
html[lang="zh-CN"] .language-switch {
  font-family: "Avenir Next", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

body::selection {
  color: var(--inverse-fg);
  background: var(--fg);
}

a {
  color: inherit;
  text-decoration: none;
  text-underline-offset: 0.2em;
}

a:hover {
  color: var(--weak);
}

a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--fg);
  outline-offset: 4px;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(253, 253, 251, 0.88);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid rgba(223, 221, 214, 0.66);
}

.nav {
  width: min(100% - 56px, var(--max));
  min-height: 82px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  min-width: max-content;
  color: var(--fg);
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1;
}

.brand img {
  display: block;
  width: auto;
  height: 27px;
}

.brand .labs {
  padding-top: 2px;
  font-size: 14px;
}

.nav-links {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 30px;
  color: var(--fg);
  font-family: var(--font-display);
  font-size: 12px;
  font-weight: 600;
}

.nav-links a {
  position: relative;
}

.nav-links a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -7px;
  height: 1px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 160ms ease;
}

.nav-links a:hover::after,
.nav-links a[aria-current="page"]::after {
  transform: scaleX(1);
}

.container {
  width: min(100% - 56px, var(--max));
  margin: 0 auto;
}

.narrow {
  width: min(100% - 56px, var(--measure));
  margin: 0 auto;
}

.hero {
  position: relative;
  padding: 78px 0 0;
  isolation: isolate;
}

.hero::before {
  content: "";
  position: absolute;
  top: 34px;
  right: 0;
  z-index: -1;
  width: min(42vw, 520px);
  height: 180px;
  background:
    linear-gradient(90deg, transparent 0 22%, rgba(5, 5, 5, 0.2) 22% calc(22% + 1px), transparent calc(22% + 1px)),
    linear-gradient(0deg, transparent 0 58%, rgba(5, 5, 5, 0.18) 58% calc(58% + 1px), transparent calc(58% + 1px)),
    radial-gradient(circle at 22% 58%, var(--fg) 0 3px, transparent 3.5px),
    radial-gradient(circle at 58% 22%, var(--fg) 0 3px, transparent 3.5px),
    radial-gradient(circle at 84% 72%, var(--signal) 0 3px, transparent 3.5px);
  opacity: 0.52;
}

.eyebrow {
  margin: 0 0 26px;
  color: var(--weak);
  font-family: var(--font-display);
  font-size: 12px;
  font-weight: 700;
}

.hero h1 {
  max-width: 1060px;
  font-family: var(--font-display);
  font-size: clamp(44px, 7.8vw, 88px);
  line-height: 1.02;
  font-weight: 300;
  letter-spacing: 0;
  text-wrap: balance;
}

.hero h1 span {
  display: block;
  font-weight: 800;
}

.hero .deck {
  max-width: 720px;
  margin-top: 22px;
  color: var(--muted);
  font-size: 18px;
  line-height: 1.55;
}

.hero-actions {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 22px;
  margin-top: 30px;
}

.button-link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 22px;
  color: var(--inverse-fg);
  background: var(--fg);
  border: 1px solid var(--fg);
  font-family: var(--font-display);
  font-size: 12px;
  font-weight: 800;
}

.button-link:hover {
  color: var(--fg);
  background: transparent;
}

.text-link {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--fg);
  font-family: var(--font-display);
  font-size: 12px;
  font-weight: 800;
}

.text-link::after {
  content: "";
  width: 34px;
  height: 1px;
  background: currentColor;
}

.hero-visual {
  position: relative;
  isolation: isolate;
  height: clamp(220px, 34vw, 410px);
  margin: 10px 0 72px;
  overflow: hidden;
}

.hero-visual::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  background:
    linear-gradient(90deg, var(--bg) 0%, rgba(253, 253, 251, 0.72) 28%, rgba(253, 253, 251, 0) 55%),
    linear-gradient(180deg, rgba(253, 253, 251, 0.85) 0%, rgba(253, 253, 251, 0) 34%, var(--bg) 100%);
  pointer-events: none;
}

.hero-visual::after {
  content: "";
  position: absolute;
  inset: 22px 0 30px;
  z-index: 2;
  pointer-events: none;
  background:
    linear-gradient(90deg, transparent 0 12%, rgba(5, 5, 5, 0.32) 12% calc(12% + 1px), transparent calc(12% + 1px) 100%),
    linear-gradient(90deg, transparent 0 38%, rgba(5, 5, 5, 0.2) 38% calc(38% + 1px), transparent calc(38% + 1px) 100%),
    linear-gradient(0deg, transparent 0 48%, rgba(5, 5, 5, 0.22) 48% calc(48% + 1px), transparent calc(48% + 1px) 100%),
    radial-gradient(circle at 12% 48%, var(--fg) 0 3px, transparent 3.5px),
    radial-gradient(circle at 38% 48%, var(--bg) 0 4px, var(--fg) 4px 5px, transparent 5.5px),
    radial-gradient(circle at 68% 28%, var(--signal) 0 3px, transparent 3.5px),
    linear-gradient(115deg, transparent 0 67%, rgba(125, 168, 183, 0.5) 67% calc(67% + 1px), transparent calc(67% + 1px));
  mix-blend-mode: multiply;
  opacity: 0.72;
}

.hero-visual img {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: cover;
  object-position: 62% 53%;
  mix-blend-mode: multiply;
}

.hero-visual figcaption {
  position: absolute;
  right: 0;
  bottom: 30px;
  z-index: 2;
  padding: 5px 9px;
  color: var(--inverse-fg);
  background: var(--fg);
  font-family: var(--font-display);
  font-size: 11px;
  font-weight: 600;
}

.home-statement {
  display: grid;
  grid-template-columns: minmax(140px, 230px) minmax(0, 760px);
  gap: 56px;
  padding: 46px 0;
  border-top: 1px solid var(--border);
}

.home-statement p:last-child {
  max-width: 700px;
  color: var(--muted);
  font-size: 18px;
  line-height: 1.55;
}

.home-index {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  padding: 0 0 96px;
}

.home-index-card {
  position: relative;
  min-height: 172px;
  padding: 28px;
  border-top: 1px solid var(--border);
  border-right: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  overflow: hidden;
  transition: background 180ms ease, border-color 180ms ease;
}

.home-index-card:first-child {
  border-left: 1px solid var(--border);
}

.home-index-card span {
  display: block;
  color: var(--weak);
  font-family: var(--font-display);
  font-size: 12px;
  font-weight: 800;
}

.home-index-card::before,
.home-index-card::after {
  content: "";
  position: absolute;
  pointer-events: none;
}

.home-index-card::before {
  top: 24px;
  right: 24px;
  width: 56px;
  height: 56px;
  border: 1px solid rgba(5, 5, 5, 0.24);
  background:
    linear-gradient(90deg, transparent calc(50% - 0.5px), rgba(5, 5, 5, 0.32) calc(50% - 0.5px) calc(50% + 0.5px), transparent calc(50% + 0.5px)),
    linear-gradient(0deg, transparent calc(50% - 0.5px), rgba(5, 5, 5, 0.32) calc(50% - 0.5px) calc(50% + 0.5px), transparent calc(50% + 0.5px));
  opacity: 0.5;
}

.home-index-card::after {
  top: 45px;
  right: 45px;
  width: 10px;
  height: 10px;
  background: var(--bg);
  border: 2px solid var(--fg);
  border-radius: 50%;
}

.home-index-card:nth-child(2)::before {
  border-radius: 50%;
  background:
    radial-gradient(circle at 50% 50%, transparent 0 9px, rgba(5, 5, 5, 0.26) 9px 10px, transparent 10px),
    linear-gradient(116deg, transparent calc(50% - 0.5px), rgba(5, 5, 5, 0.28) calc(50% - 0.5px) calc(50% + 0.5px), transparent calc(50% + 0.5px));
}

.home-index-card:nth-child(3)::before {
  background:
    linear-gradient(90deg, rgba(5, 5, 5, 0.24) 1px, transparent 1px) 0 0 / 14px 14px,
    linear-gradient(0deg, rgba(5, 5, 5, 0.2) 1px, transparent 1px) 0 0 / 14px 14px;
}

.home-index-card:nth-child(4)::before {
  border-color: rgba(5, 5, 5, 0.18);
  background:
    radial-gradient(circle at 50% 50%, var(--fg) 0 3px, transparent 3.5px),
    linear-gradient(90deg, transparent 0 50%, rgba(5, 5, 5, 0.28) 50% calc(50% + 1px), transparent calc(50% + 1px)),
    linear-gradient(0deg, transparent 0 50%, rgba(5, 5, 5, 0.28) 50% calc(50% + 1px), transparent calc(50% + 1px));
}

.home-index-card:nth-child(5)::before {
  border-color: rgba(5, 5, 5, 0.22);
  background:
    linear-gradient(45deg, transparent calc(50% - 0.5px), rgba(5, 5, 5, 0.28) calc(50% - 0.5px) calc(50% + 0.5px), transparent calc(50% + 0.5px)),
    linear-gradient(135deg, transparent calc(50% - 0.5px), rgba(5, 5, 5, 0.28) calc(50% - 0.5px) calc(50% + 0.5px), transparent calc(50% + 0.5px));
}

.home-index-card:hover {
  background: rgba(255, 255, 255, 0.72);
  border-color: rgba(5, 5, 5, 0.36);
}

.home-index-card:hover::before {
  opacity: 0.8;
}

.home-index-card strong {
  display: block;
  margin-top: 34px;
  font-family: var(--font-display);
  font-size: 24px;
  line-height: 1.1;
}

.home-index-card p {
  margin-top: 14px;
  color: var(--muted);
}

.section {
  padding: 94px 0;
  border-top: 1px solid var(--border);
}

.section.alt {
  background: var(--wash);
  border-top: 0;
}

.section-head {
  display: grid;
  grid-template-columns: minmax(140px, 230px) minmax(0, 1fr);
  gap: 56px;
  margin-bottom: 50px;
}

.section-kicker {
  color: var(--weak);
  font-family: var(--font-display);
  font-size: 12px;
  font-weight: 800;
}

.section-title {
  max-width: 800px;
  font-family: var(--font-display);
  font-size: clamp(30px, 4.2vw, 50px);
  line-height: 1.08;
  font-weight: 800;
  letter-spacing: 0;
  text-wrap: balance;
}

.principles {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 54px;
}

.principle {
  padding-top: 20px;
  border-top: 2px solid var(--fg);
}

.index {
  display: block;
  margin-bottom: 52px;
  color: var(--weak);
  font-family: var(--font-display);
  font-size: 12px;
  font-weight: 800;
}

.principle h3,
.topic h3 {
  font-family: var(--font-display);
  font-size: 22px;
  line-height: 1.18;
  font-weight: 800;
  letter-spacing: 0;
  text-wrap: balance;
}

.principle p,
.topic p,
.body-copy p,
.definition dd,
.legal p,
.legal li {
  margin-top: 14px;
  color: var(--muted);
}

.statement {
  max-width: 1000px;
  font-family: var(--font-display);
  font-size: clamp(34px, 5vw, 64px);
  line-height: 1.08;
  font-weight: 800;
  letter-spacing: 0;
  text-wrap: balance;
}

.statement-note {
  max-width: 650px;
  margin-top: 26px;
  color: var(--muted);
  font-size: 18px;
}

.topics {
  display: grid;
  gap: 0;
}

.topic {
  display: grid;
  grid-template-columns: 170px minmax(0, 1fr);
  gap: 48px;
  padding: 34px 0;
  border-top: 1px solid var(--border);
}

.topic:last-child {
  border-bottom: 1px solid var(--border);
}

.topic .status {
  color: var(--weak);
  font-family: var(--font-display);
  font-size: 12px;
  font-weight: 800;
}

.contact-band {
  padding: 92px 0;
  background: var(--wash);
}

.contact-band .container {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 430px);
  align-items: center;
  gap: 72px;
}

.contact-band h2 {
  max-width: 620px;
  margin-top: 12px;
  font-family: var(--font-display);
  font-size: clamp(34px, 5vw, 62px);
  line-height: 1.05;
  font-weight: 800;
  letter-spacing: 0;
  text-wrap: balance;
}

.contact-card {
  padding: 48px 42px;
  background: var(--surface);
  box-shadow: 0 28px 70px rgba(0, 0, 0, 0.08);
}

.contact-card p {
  color: var(--muted);
}

.email-link {
  display: inline-block;
  max-width: 100%;
  margin-top: 22px;
  overflow-wrap: anywhere;
  font-family: var(--font-display);
  font-size: clamp(22px, 3vw, 32px);
  line-height: 1.18;
  font-weight: 800;
}

.page-hero {
  padding: 96px 0 72px;
  border-bottom: 1px solid var(--border);
}

.page-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(42px, 6.4vw, 72px);
  line-height: 1.05;
  font-weight: 800;
  letter-spacing: 0;
}

.page-hero p {
  max-width: 700px;
  margin-top: 22px;
  color: var(--muted);
  font-size: 19px;
  line-height: 1.5;
}

.page-hero--visual,
.page-hero--policy {
  width: min(100% - 56px, var(--max));
  display: grid;
  grid-template-columns: minmax(0, 720px) minmax(340px, 1fr);
  align-items: center;
  gap: 78px;
}

.page-copy {
  min-width: 0;
}

.page-plate {
  position: relative;
  height: 310px;
  margin: 0;
  overflow: hidden;
  background: transparent;
  border: 1px solid var(--border);
}

.page-plate::before {
  content: "";
  position: absolute;
  inset: 18px;
  z-index: 2;
  pointer-events: none;
  border: 1px solid rgba(253, 253, 251, 0.56);
  background:
    radial-gradient(circle at 22% 24%, var(--bg) 0 3px, rgba(5, 5, 5, 0.85) 3px 4px, transparent 4.5px),
    radial-gradient(circle at 72% 34%, var(--signal) 0 3px, transparent 3.5px),
    radial-gradient(circle at 48% 74%, var(--bg) 0 3px, rgba(5, 5, 5, 0.85) 3px 4px, transparent 4.5px),
    linear-gradient(106deg, transparent 0 52%, rgba(253, 253, 251, 0.58) 52% calc(52% + 1px), transparent calc(52% + 1px)),
    linear-gradient(0deg, transparent 0 64%, rgba(253, 253, 251, 0.48) 64% calc(64% + 1px), transparent calc(64% + 1px));
  opacity: 0.8;
}

.page-plate img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 58% 50%;
  filter: grayscale(1) contrast(1.03);
  mix-blend-mode: darken;
}

.page-plate::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(90deg, rgba(5, 5, 5, 0.032) 1px, transparent 1px) 0 0 / 34px 34px,
    linear-gradient(180deg, rgba(253, 253, 251, 0.16), transparent 42%);
  mix-blend-mode: multiply;
}

.page-plate figcaption {
  position: absolute;
  left: 22px;
  bottom: 22px;
  z-index: 2;
  padding: 5px 9px;
  color: var(--inverse-fg);
  background: var(--fg);
  font-family: var(--font-display);
  font-size: 11px;
  font-weight: 700;
  line-height: 1.2;
}

.page-mark {
  position: relative;
  min-height: 310px;
  overflow: hidden;
  background:
    radial-gradient(circle at 65% 35%, rgba(5, 5, 5, 0.08), transparent 34%),
    linear-gradient(90deg, rgba(5, 5, 5, 0.04) 1px, transparent 1px) 0 0 / 34px 34px,
    var(--wash-2);
  border: 1px solid var(--border);
}

.page-mark::before,
.page-mark::after {
  content: "";
  position: absolute;
  inset: 46px 34px;
  pointer-events: none;
}

.page-mark::before {
  border-top: 2px solid var(--fg);
  border-right: 1px solid rgba(5, 5, 5, 0.34);
  transform: skewY(-9deg);
  transform-origin: center;
}

.page-mark::after {
  border-bottom: 1px solid rgba(5, 5, 5, 0.28);
  border-left: 1px solid rgba(5, 5, 5, 0.28);
  transform: skewY(13deg);
}

.mark-label {
  position: absolute;
  left: 22px;
  bottom: 22px;
  z-index: 2;
  padding: 5px 9px;
  color: var(--inverse-fg);
  background: var(--fg);
  font-family: var(--font-display);
  font-size: 11px;
  font-weight: 700;
}

.mark-node {
  position: absolute;
  z-index: 2;
  width: 12px;
  height: 12px;
  border: 2px solid var(--fg);
  background: var(--surface);
  border-radius: 50%;
}

.mark-node::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  width: 1px;
  height: 74px;
  background: rgba(5, 5, 5, 0.28);
  transform: translate(-50%, -100%);
}

.mark-node-a {
  left: 17%;
  top: 42%;
}

.mark-node-b {
  left: 42%;
  top: 26%;
}

.mark-node-c {
  left: 61%;
  top: 58%;
}

.mark-node-d {
  left: 78%;
  top: 36%;
}

.page-mark--research::before {
  transform: skewY(8deg);
}

.page-mark--research::after {
  transform: skewY(-14deg);
}

.page-mark--about {
  background:
    linear-gradient(135deg, transparent 0 46%, rgba(5, 5, 5, 0.08) 46% 47%, transparent 47%),
    linear-gradient(90deg, rgba(5, 5, 5, 0.04) 1px, transparent 1px) 0 0 / 34px 34px,
    var(--wash-2);
}

.page-mark--contact {
  background:
    radial-gradient(circle at 52% 48%, rgba(5, 5, 5, 0.09), transparent 9%),
    radial-gradient(circle at 72% 30%, rgba(5, 5, 5, 0.07), transparent 15%),
    linear-gradient(90deg, rgba(5, 5, 5, 0.04) 1px, transparent 1px) 0 0 / 34px 34px,
    var(--wash-2);
}

.body-copy--indexed {
  counter-reset: body-section;
}

.body-copy--indexed h2 {
  position: relative;
  display: grid;
  grid-template-columns: 56px minmax(0, 1fr);
  gap: 20px;
  align-items: start;
}

.body-copy--indexed h2::before {
  counter-increment: body-section;
  content: counter(body-section, decimal-leading-zero);
  color: var(--weak);
  font-family: var(--font-display);
  font-size: 12px;
  font-weight: 800;
  line-height: 1.4;
}

.body-copy--indexed h2::after {
  content: "";
  position: absolute;
  left: -42px;
  top: 36px;
  width: 14px;
  height: 14px;
  border: 1px solid rgba(5, 5, 5, 0.24);
  background:
    linear-gradient(90deg, transparent calc(50% - 0.5px), rgba(5, 5, 5, 0.5) calc(50% - 0.5px) calc(50% + 0.5px), transparent calc(50% + 0.5px)),
    linear-gradient(0deg, transparent calc(50% - 0.5px), rgba(5, 5, 5, 0.5) calc(50% - 0.5px) calc(50% + 0.5px), transparent calc(50% + 0.5px));
}

.research-atlas,
.identity-strip,
.contact-layout {
  padding: 54px 0 0;
}

.research-atlas {
  position: relative;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  background: transparent;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  overflow: hidden;
}

.research-atlas::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(90deg, transparent 0 24%, var(--signal-soft) 24% calc(24% + 1px), transparent calc(24% + 1px)),
    linear-gradient(90deg, transparent 0 76%, rgba(5, 5, 5, 0.08) 76% calc(76% + 1px), transparent calc(76% + 1px)),
    linear-gradient(0deg, transparent 0 58%, rgba(5, 5, 5, 0.1) 58% calc(58% + 1px), transparent calc(58% + 1px));
}

.atlas-card {
  position: relative;
  min-height: 220px;
  padding: 28px;
  background: var(--bg);
  border-right: 1px solid var(--border);
  overflow: hidden;
}

.atlas-card:last-child {
  border-right: 0;
}

.atlas-card span,
.identity-strip span,
.panel-kicker,
.policy-note span {
  display: block;
  color: var(--weak);
  font-family: var(--font-display);
  font-size: 12px;
  font-weight: 800;
}

.atlas-card::before,
.identity-strip > div::before,
.contact-panel::before,
.policy-note::before {
  content: "";
  position: absolute;
  pointer-events: none;
}

.atlas-card::before {
  right: 26px;
  bottom: 26px;
  width: 62px;
  height: 62px;
  border: 1px solid rgba(5, 5, 5, 0.18);
  background:
    radial-gradient(circle at 50% 50%, var(--bg) 0 7px, rgba(5, 5, 5, 0.38) 7px 8px, transparent 8.5px),
    radial-gradient(circle at 24% 24%, var(--fg) 0 2px, transparent 2.5px),
    radial-gradient(circle at 76% 34%, var(--signal) 0 2px, transparent 2.5px),
    radial-gradient(circle at 35% 78%, var(--fg) 0 2px, transparent 2.5px),
    linear-gradient(90deg, transparent calc(50% - 0.5px), rgba(5, 5, 5, 0.18) calc(50% - 0.5px) calc(50% + 0.5px), transparent calc(50% + 0.5px));
  opacity: 0.62;
}

.atlas-card strong,
.identity-strip strong {
  display: block;
  margin-top: 42px;
  font-family: var(--font-display);
  font-size: 23px;
  line-height: 1.15;
}

.atlas-card p {
  margin-top: 14px;
  color: var(--muted);
}

.identity-strip {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  background: transparent;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.identity-strip > div {
  position: relative;
  min-height: 170px;
  padding: 28px;
  background: var(--bg);
  border-right: 1px solid var(--border);
  overflow: hidden;
}

.identity-strip > div::before {
  right: 26px;
  bottom: 26px;
  width: 54px;
  height: 54px;
  border: 1px solid rgba(5, 5, 5, 0.18);
  background:
    linear-gradient(90deg, rgba(5, 5, 5, 0.18) 1px, transparent 1px) 0 0 / 13px 13px,
    linear-gradient(0deg, rgba(5, 5, 5, 0.14) 1px, transparent 1px) 0 0 / 13px 13px;
  opacity: 0.58;
}

.identity-strip > div:last-child {
  border-right: 0;
}

.contact-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 430px);
  gap: 34px;
}

.contact-panel {
  position: relative;
  padding: 42px;
  background: var(--surface);
  border: 1px solid var(--border);
  overflow: hidden;
}

.contact-panel::before {
  right: 34px;
  top: 34px;
  width: 84px;
  height: 84px;
  border: 1px solid rgba(5, 5, 5, 0.18);
  background:
    radial-gradient(circle at 50% 50%, var(--fg) 0 3px, transparent 3.5px),
    linear-gradient(90deg, transparent 0 50%, rgba(5, 5, 5, 0.24) 50% calc(50% + 1px), transparent calc(50% + 1px)),
    linear-gradient(0deg, transparent 0 50%, rgba(5, 5, 5, 0.24) 50% calc(50% + 1px), transparent calc(50% + 1px));
  opacity: 0.34;
}

.contact-panel--dark {
  color: var(--inverse-fg);
  background: var(--fg);
  border-color: var(--fg);
}

.contact-panel--dark::before {
  border-color: rgba(255, 255, 255, 0.22);
  background:
    radial-gradient(circle at 50% 50%, var(--inverse-fg) 0 3px, transparent 3.5px),
    linear-gradient(90deg, transparent 0 50%, rgba(255, 255, 255, 0.28) 50% calc(50% + 1px), transparent calc(50% + 1px)),
    linear-gradient(0deg, transparent 0 50%, rgba(255, 255, 255, 0.28) 50% calc(50% + 1px), transparent calc(50% + 1px));
  opacity: 0.42;
}

.contact-panel--dark p {
  margin-top: 36px;
  color: var(--border);
}

.contact-panel--dark a {
  text-decoration: underline;
}

.policy-note {
  position: relative;
  align-self: stretch;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  min-height: 230px;
  padding: 28px;
  background:
    linear-gradient(90deg, rgba(5, 5, 5, 0.04) 1px, transparent 1px) 0 0 / 34px 34px,
    var(--wash-2);
  border: 1px solid var(--border);
  overflow: hidden;
}

.policy-note::before {
  right: 28px;
  top: 28px;
  width: 78px;
  height: 78px;
  border: 1px solid rgba(5, 5, 5, 0.18);
  background:
    linear-gradient(135deg, transparent 0 49%, rgba(125, 168, 183, 0.48) 49% 51%, transparent 51%),
    linear-gradient(90deg, rgba(5, 5, 5, 0.14) 1px, transparent 1px) 0 0 / 19px 19px,
    linear-gradient(0deg, rgba(5, 5, 5, 0.12) 1px, transparent 1px) 0 0 / 19px 19px;
  opacity: 0.78;
}

.policy-note strong {
  display: block;
  max-width: 320px;
  margin-top: 44px;
  font-family: var(--font-display);
  font-size: 24px;
  line-height: 1.15;
}

.body-copy {
  padding: 68px 0 96px;
}

.body-copy h2,
.legal h2 {
  margin-top: 58px;
  padding-top: 30px;
  border-top: 1px solid var(--border);
  font-family: var(--font-display);
  font-size: 28px;
  line-height: 1.15;
  font-weight: 800;
  letter-spacing: 0;
}

.body-copy h2:first-child,
.legal h2:first-child {
  margin-top: 0;
  padding-top: 0;
  border-top: 0;
}

.body-copy ul,
.legal ul {
  margin: 18px 0 0;
  padding-left: 22px;
  color: var(--muted);
}

.definition {
  display: grid;
  grid-template-columns: 180px minmax(0, 1fr);
  column-gap: 28px;
  row-gap: 0;
  margin: 28px 0 0;
}

.definition dt {
  padding-top: 16px;
  border-top: 1px solid var(--border);
  color: var(--weak);
  font-family: var(--font-display);
  font-size: 12px;
  font-weight: 800;
}

.definition dd {
  padding-top: 16px;
  border-top: 1px solid var(--border);
  margin: 0;
  color: var(--fg);
}

.legal {
  padding: 68px 0 100px;
}

.legal h3 {
  margin: 34px 0 0;
  font-family: var(--font-display);
  font-size: 20px;
  line-height: 1.25;
  font-weight: 800;
}

.site-footer {
  border-top: 1px solid var(--border);
  padding: 46px 0;
  background: var(--bg);
}

.footer-grid {
  width: min(100% - 56px, var(--max));
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 24px;
  color: var(--weak);
  font-family: var(--font-display);
  font-size: 12px;
  font-weight: 600;
}

.footer-links {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 24px;
}

.language-switch {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding-left: 2px;
}

.language-switch button {
  appearance: none;
  padding: 0;
  color: inherit;
  background: transparent;
  border: 0;
  border-bottom: 1px solid transparent;
  cursor: pointer;
  font: inherit;
}

.language-switch button:hover,
.language-switch button[data-active] {
  color: var(--fg);
  border-bottom-color: currentColor;
}

@media (max-width: 860px) {
  .nav,
  .container,
  .narrow,
  .footer-grid {
    width: min(100% - 40px, var(--max));
  }

  .nav {
    min-height: 70px;
    align-items: flex-start;
    flex-direction: column;
    justify-content: center;
    gap: 14px;
    padding: 14px 0;
  }

  .nav-links {
    width: 100%;
    justify-content: flex-start;
    flex-wrap: wrap;
    gap: 14px 22px;
  }

  .hero {
    padding: 64px 0 0;
  }

  .hero .deck,
  .page-hero p {
    font-size: 18px;
  }

  .hero-visual {
    height: 280px;
    margin-bottom: 68px;
  }

  .section {
    padding: 68px 0;
  }

  .home-statement {
    grid-template-columns: 1fr;
    gap: 22px;
    padding: 42px 0;
  }

  .home-index {
    grid-template-columns: 1fr;
    padding-bottom: 68px;
  }

  .home-index-card {
    min-height: auto;
    border-right: 1px solid var(--border);
    border-bottom: 0;
  }

  .home-index-card:last-child {
    border-bottom: 1px solid var(--border);
  }

  .home-index-card strong {
    margin-top: 30px;
  }

  .section-head,
  .topic,
  .contact-band .container,
  .page-hero--visual,
  .page-hero--policy,
  .footer-grid,
  .definition,
  .research-atlas,
  .identity-strip,
  .contact-layout {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .page-hero--visual,
  .page-hero--policy {
    width: min(100% - 40px, var(--max));
    gap: 34px;
  }

  .page-mark {
    min-height: 240px;
  }

  .page-plate {
    height: 280px;
  }

  .research-atlas,
  .identity-strip,
  .contact-layout {
    padding-top: 34px;
  }

  .atlas-card,
  .identity-strip > div {
    min-height: auto;
    border-right: 0;
    border-bottom: 1px solid var(--border);
  }

  .atlas-card:last-child,
  .identity-strip > div:last-child {
    border-bottom: 0;
  }

  .atlas-card strong,
  .identity-strip strong {
    margin-top: 24px;
  }

  .principles {
    grid-template-columns: 1fr;
    gap: 36px;
  }

  .index {
    margin-bottom: 24px;
  }

  .contact-band {
    padding: 68px 0;
  }

  .contact-card {
    padding: 34px 28px;
  }

  .definition dt {
    padding-bottom: 0;
  }

  .definition dd {
    padding-top: 0;
    border-top: 0;
  }

  .footer-links {
    justify-content: flex-start;
    flex-wrap: wrap;
  }

  .language-switch {
    width: 100%;
    padding-top: 2px;
  }
}

@media (max-width: 520px) {
  .brand img {
    height: 23px;
  }

  .brand .labs {
    font-size: 13px;
  }

  .hero h1 {
    font-size: 42px;
  }

  .hero-visual {
    height: 240px;
  }

  .page-plate {
    height: 240px;
  }

  .hero-visual figcaption {
    left: 0;
    right: auto;
    bottom: 18px;
  }

  .page-hero {
    padding: 70px 0 54px;
  }

  .body-copy--indexed h2 {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .contact-panel {
    padding: 30px 24px;
  }
}

/* ---------- Collaborate page ---------- */

.body-copy .section-kicker {
  margin: 0 0 18px;
  color: var(--weak);
}

.role-list {
  padding: 72px 0 24px;
}

.role-list__item {
  padding: 56px 0;
  border-top: 1px solid var(--border);
}

.role-list__item:last-child {
  border-bottom: 1px solid var(--border);
}

.role-list__eyebrow {
  margin: 0;
  color: var(--weak);
  font-family: var(--font-display);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.role-list__title {
  max-width: 620px;
  margin: 18px 0 0;
  font-family: var(--font-display);
  font-size: clamp(24px, 2.6vw, 30px);
  line-height: 1.2;
  font-weight: 800;
  letter-spacing: 0;
  text-wrap: balance;
}

.role-list__body {
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 17px;
  line-height: 1.65;
}

.role-list__posture {
  margin: 22px 0 0;
  padding-left: 18px;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.65;
}

.role-list__posture li {
  margin-top: 8px;
}

.role-list__posture li::marker {
  color: var(--weak);
}

.conversation {
  padding-top: 56px;
}

.conversation__lead {
  margin: 16px 0 0;
  color: var(--muted);
  font-size: 17px;
}

.conversation__hint {
  margin: 28px 0 0;
  color: var(--weak);
  font-size: 14px;
  line-height: 1.55;
}

.conversation__prefixes {
  margin: 10px 0 0;
  color: var(--muted);
  font-family: var(--font-display);
  font-size: 14px;
  letter-spacing: 0.04em;
}

.conversation__prefixes code {
  display: inline-block;
  margin-right: 12px;
  padding: 2px 8px;
  border: 1px solid var(--border);
  background: var(--wash-2);
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 700;
  color: var(--fg);
}

.quiet-note {
  padding: 40px 0 96px;
}

.quiet-note p {
  margin: 0;
  color: var(--weak);
  font-size: 14px;
  line-height: 1.6;
}

html[lang="zh-CN"] .role-list__eyebrow,
html[lang="zh-CN"] .role-list__title,
html[lang="zh-CN"] .conversation__prefixes,
html[lang="zh-CN"] .conversation__prefixes code {
  font-family: "Songti SC", "STSong", "Noto Serif CJK SC", "Source Han Serif SC", SimSun, serif;
}

@media (max-width: 860px) {
  .role-list {
    padding: 56px 0 16px;
  }

  .role-list__item {
    padding: 40px 0;
  }

  .role-list__title {
    font-size: 22px;
  }

  .conversation {
    padding-top: 40px;
  }

  .conversation__prefixes code {
    margin-bottom: 6px;
  }

  .quiet-note {
    padding: 32px 0 72px;
  }
}