:root {
  color-scheme: dark;
  --bg: #08090a;
  --surface: #0d0f10;
  --line: rgba(255, 255, 255, 0.13);
  --line-soft: rgba(255, 255, 255, 0.07);
  --text: #f2f2ee;
  --muted: #989c9f;
  --blue: #849fd0;
  --page: min(1240px, calc(100vw - 64px));
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background:
    radial-gradient(circle at 50% 0%, rgba(31, 40, 50, 0.16), transparent 34rem),
    var(--bg);
  color: var(--text);
  font-family: "DM Sans", "Noto Sans SC", sans-serif;
  font-weight: 400;
  line-height: 1.7;
}

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

img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.62) brightness(0.72) contrast(1.08);
  transition: filter 500ms ease, transform 700ms cubic-bezier(0.2, 0.7, 0, 1);
}

.site-header {
  width: var(--page);
  height: 86px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  border-bottom: 1px solid var(--line-soft);
  font-size: 12px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 15px;
  width: fit-content;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.3em;
}

.brand-mark {
  width: 30px;
  height: 30px;
  border: 1px solid var(--line);
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-size: 12px;
  letter-spacing: 0;
}

.site-nav {
  display: flex;
  gap: 42px;
  color: var(--muted);
}

.site-nav a,
.enter-link,
.profile-copy a {
  transition: color 180ms ease;
}

.site-nav a:hover,
.enter-link:hover,
.profile-copy a:hover {
  color: var(--text);
}

.enter-link {
  justify-self: end;
  color: var(--blue);
}

.hero,
.people-section,
.ai-section,
.page-footer {
  width: var(--page);
  margin-inline: auto;
}

.hero {
  padding: 118px 0 88px;
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 70px;
}

.eyebrow {
  margin: 0 0 18px;
  color: var(--blue);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

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

h1 {
  max-width: 720px;
  margin-bottom: 34px;
  font-size: clamp(54px, 7vw, 92px);
  font-weight: 400;
  line-height: 0.98;
  letter-spacing: -0.065em;
}

.hero-copy {
  max-width: 620px;
  margin: 0;
  color: var(--muted);
  font-family: "Noto Sans SC", sans-serif;
  font-size: 16px;
  font-weight: 300;
  line-height: 1.9;
}

.hero-note {
  align-self: end;
  padding-bottom: 4px;
  color: var(--muted);
  font-family: "Noto Sans SC", sans-serif;
  font-size: 14px;
  line-height: 1.85;
}

.hero-note a {
  color: var(--blue);
}

.image-shell {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: var(--surface);
}

.image-shell:hover img {
  filter: saturate(0.86) brightness(0.85) contrast(1.03);
  transform: scale(1.015);
}

.hero-image {
  grid-column: 1 / -1;
  aspect-ratio: 16 / 6.2;
  margin: 18px 0 0;
}

.section-intro {
  padding: 90px 0 76px;
  border-top: 1px solid var(--line-soft);
}

.section-intro h2 {
  max-width: 650px;
  margin: 0;
  font-size: clamp(42px, 5vw, 70px);
  font-weight: 400;
  line-height: 1.02;
  letter-spacing: -0.055em;
}

.contributor {
  min-height: 430px;
  padding: 24px 0;
  border-bottom: 1px solid var(--line);
  display: grid;
  grid-template-columns: minmax(300px, 0.82fr) minmax(0, 1.2fr);
  gap: clamp(54px, 7vw, 118px);
  align-items: center;
}

.contributor--reverse .profile-image {
  grid-column: 2;
}

.contributor--reverse .profile-copy {
  grid-column: 1;
  grid-row: 1;
}

.profile-image {
  width: 100%;
  margin: 0;
}

.profile-image.landscape {
  aspect-ratio: 4 / 3;
}

.profile-image.portrait {
  width: 82%;
  aspect-ratio: 3 / 4;
}

.contributor--reverse .profile-image.portrait {
  justify-self: end;
}

.profile-copy {
  padding: 40px 0;
  max-width: 650px;
}

.profile-copy header {
  margin-bottom: 24px;
}

.profile-copy h3 {
  margin: 0;
  font-size: clamp(34px, 4vw, 52px);
  font-weight: 400;
  line-height: 1;
  letter-spacing: -0.05em;
}

.role {
  margin: 8px 0 0;
  color: var(--blue);
  font-size: 12px;
}

.profile-copy > p,
.contribution p {
  max-width: 560px;
  color: var(--muted);
  font-family: "Noto Sans SC", sans-serif;
  font-size: 16px;
  font-weight: 400;
  line-height: 1.9;
}

.contribution {
  margin-top: 26px;
}

.contribution span {
  display: block;
  margin-bottom: 8px;
  color: var(--blue);
  font-size: 9px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.profile-copy footer {
  margin-top: 28px;
  display: flex;
  justify-content: space-between;
  gap: 20px;
  color: #b2b5b7;
  font-size: 12px;
}

.more-contributors {
  padding: 140px 0 30px;
}

.more-contributors-intro {
  padding-bottom: 70px;
}

.more-contributors-intro h2 {
  max-width: 650px;
  margin: 0;
  font-size: clamp(42px, 5vw, 70px);
  font-weight: 400;
  line-height: 1.02;
  letter-spacing: -0.055em;
}

.member-pool {
  display: none;
}

.member-grid {
  display: grid;
  gap: 68px 24px;
}

.member-grid--portrait {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.member-grid--landscape {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-top: 90px;
}

.member-grid:empty {
  display: none;
}

.member-card {
  min-width: 0;
}

.member-image {
  width: 100%;
  margin: 0 0 22px;
}

.member-grid--portrait .member-image {
  aspect-ratio: 3 / 4;
}

.member-grid--landscape .member-image {
  aspect-ratio: 4 / 3;
}

.member-card .image-shell:hover img {
  filter: saturate(0.62) brightness(0.72) contrast(1.08);
  transform: none;
}

.member-card h3 {
  margin: 0 0 8px;
  font-size: 22px;
  font-weight: 400;
  line-height: 1.15;
  letter-spacing: -0.035em;
}

.github-link {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  color: var(--muted);
  font-size: 11px;
  transition: color 180ms ease;
}

.github-link:hover {
  color: var(--blue);
}

.github-link svg {
  width: 14px;
  height: 14px;
  fill: currentColor;
}

.profile-copy footer p {
  margin: 0;
}

.profile-copy footer div {
  display: flex;
  gap: 22px;
  white-space: nowrap;
}

.ai-section {
  padding: 150px 0 130px;
}

.ai-intro {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 30px;
}

.ai-intro .eyebrow {
  grid-column: 1 / -1;
}

.ai-intro > p:last-child {
  max-width: 460px;
  align-self: end;
  margin: 0;
  color: var(--muted);
  font-family: "Noto Sans SC", sans-serif;
  font-size: 15px;
  font-weight: 300;
  line-height: 1.9;
}

.model-list {
  border-top: 1px solid var(--line);
}

.model-row {
  min-height: 112px;
  padding: 20px 2px;
  border-bottom: 1px solid var(--line);
  display: grid;
  grid-template-columns: 58px 220px 1fr 30px;
  gap: 24px;
  align-items: center;
  transition: background-color 220ms ease, padding 220ms ease;
}

.model-row:hover {
  padding-inline: 18px;
  background: rgba(255, 255, 255, 0.025);
}

.model-logo {
  width: 46px;
  height: 46px;
  border: 1px solid var(--line);
  border-radius: 14px;
  display: grid;
  place-items: center;
  background: #101214;
}

.xiaomi-logo {
  color: #ff6900;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: -0.08em;
}

.chatgpt-logo svg {
  width: 25px;
  fill: #d6dbd8;
}

.model-name {
  font-size: 18px;
  font-weight: 500;
}

.model-description {
  color: var(--muted);
  font-family: "Noto Sans SC", sans-serif;
  font-size: 14px;
  font-weight: 300;
}

.arrow {
  justify-self: end;
  color: var(--blue);
}

.page-footer {
  min-height: 120px;
  border-top: 1px solid var(--line-soft);
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  color: var(--muted);
  font-size: 10px;
}

.page-footer p {
  margin: 0;
}

.page-footer p:last-child {
  justify-self: end;
}

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 700ms ease, transform 700ms ease;
}

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

@media (max-width: 900px) {
  :root {
    --page: min(100% - 40px, 720px);
  }

  .site-header {
    grid-template-columns: 1fr auto;
  }

  .site-nav {
    display: none;
  }

  .hero {
    padding-top: 80px;
    grid-template-columns: 1fr;
    gap: 38px;
  }

  .hero-note {
    align-self: start;
  }

  .contributor {
    grid-template-columns: minmax(230px, 0.8fr) minmax(0, 1.2fr);
    gap: 42px;
  }

  .profile-copy footer {
    flex-direction: column;
  }

  .member-grid--portrait,
  .member-grid--landscape {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 760px) {
  :root {
    --page: calc(100% - 32px);
  }

  .site-header {
    height: 72px;
  }

  .enter-link {
    font-size: 0;
  }

  .enter-link span {
    font-size: 14px;
  }

  h1 {
    font-size: clamp(46px, 14vw, 68px);
  }

  .hero {
    padding: 66px 0 54px;
  }

  .hero-image {
    aspect-ratio: 4 / 3;
  }

  .section-intro {
    padding: 70px 0 44px;
  }

  .contributor,
  .contributor--reverse {
    padding: 34px 0 46px;
    display: flex;
    flex-direction: column;
    gap: 24px;
    align-items: stretch;
  }

  .profile-image.portrait,
  .contributor--reverse .profile-image.portrait {
    width: 78%;
    align-self: flex-start;
  }

  .contributor--reverse .profile-image.portrait {
    align-self: flex-end;
  }

  .profile-copy {
    padding: 6px 0 0;
  }

  .profile-copy footer {
    margin-top: 22px;
  }

  .more-contributors {
    padding-top: 90px;
  }

  .more-contributors-intro {
    padding-bottom: 44px;
  }

  .member-grid--portrait,
  .member-grid--landscape {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .member-grid--landscape {
    margin-top: 48px;
  }

  .member-card h3 {
    font-size: 25px;
  }

  .ai-section {
    padding: 100px 0 90px;
  }

  .ai-intro {
    display: block;
  }

  .ai-intro > p:last-child {
    margin-top: 26px;
  }

  .model-row {
    grid-template-columns: 48px 1fr 20px;
    gap: 14px;
  }

  .model-description {
    grid-column: 2 / -1;
  }

  .arrow {
    grid-column: 3;
    grid-row: 1;
  }

  .page-footer {
    padding: 36px 0;
    display: flex;
    flex-direction: column;
    gap: 24px;
  }
}

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

  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
  }
}