:root {
  color-scheme: light;
  --ink: #152033;
  --muted: #5d6b82;
  --quiet: #eef3f8;
  --paper: #ffffff;
  --line: #d9e2ec;
  --blue: #0c4a7a;
  --blue-deep: #092f52;
  --green: #1f7a68;
  --gold: #b98118;
  --red: #a83f3b;
  --shadow: 0 18px 45px rgba(16, 33, 54, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: #f7f9fb;
  font-family: Inter, "SF Pro Text", "Segoe UI", "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
  line-height: 1.6;
  overflow-x: hidden;
}

a {
  color: inherit;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
  padding: 12px 6vw;
  background: rgba(255, 255, 255, 0.94);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(14px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
  text-decoration: none;
}

.brand img {
  width: 42px;
  height: 42px;
  border-radius: 8px;
  border: 1px solid var(--line);
}

.brand strong,
.brand small {
  display: block;
  letter-spacing: 0;
}

.brand strong {
  font-size: 1rem;
}

.brand small {
  color: var(--muted);
  font-size: 0.76rem;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 4px;
}

.site-nav a {
  padding: 9px 12px;
  color: var(--muted);
  border-radius: 6px;
  text-decoration: none;
  font-size: 0.92rem;
  font-weight: 650;
}

.site-nav a:hover,
.site-nav a.is-active {
  color: var(--blue-deep);
  background: var(--quiet);
}

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--paper);
}

.nav-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  margin: 4px auto;
  background: var(--ink);
}

.section,
.section-band,
.join-section,
.site-footer {
  padding-right: 6vw;
  padding-left: 6vw;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(300px, 0.65fr);
  gap: 44px;
  align-items: center;
  min-height: 530px;
  padding-top: 36px;
  padding-bottom: 36px;
  background:
    linear-gradient(90deg, rgba(12, 74, 122, 0.08) 1px, transparent 1px),
    linear-gradient(180deg, rgba(31, 122, 104, 0.08) 1px, transparent 1px),
    #f8fbfd;
  background-size: 56px 56px;
}

.hero-copy,
.pi-panel > div,
.research-grid article,
.publication-card,
.repo-card,
.timeline-item,
.info-block {
  min-width: 0;
  overflow-wrap: anywhere;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--green);
  font-size: 0.92rem;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

.hero .eyebrow {
  margin-bottom: 16px;
  font-size: 1.16rem;
  font-weight: 900;
  line-height: 1.35;
}

.hero h1 {
  margin: 0;
  color: var(--blue-deep);
  font-size: 4rem;
  line-height: 1;
  letter-spacing: 0;
}

.hero-lede {
  max-width: 780px;
  margin: 24px 0 0;
  color: #2f4058;
  font-size: 1.18rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 32px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 10px 16px;
  border: 1px solid transparent;
  border-radius: 6px;
  text-decoration: none;
  font-size: 0.92rem;
  font-weight: 800;
}

.button.primary {
  color: #fff;
  background: var(--blue);
}

.button.secondary {
  color: var(--blue-deep);
  background: var(--paper);
  border-color: var(--line);
}

.hero-metrics {
  display: grid;
  grid-template-columns: repeat(4, minmax(110px, 1fr));
  gap: 12px;
  max-width: 820px;
  margin: 30px 0 0;
}

.hero-metrics div {
  padding: 16px;
  background: rgba(255, 255, 255, 0.78);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.hero-metrics dt {
  color: var(--blue-deep);
  font-size: 1.7rem;
  font-weight: 850;
  line-height: 1;
}

.hero-metrics dd {
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 0.86rem;
}

.pi-panel {
  display: grid;
  gap: 22px;
  align-content: start;
  padding: 20px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.pi-photo {
  width: 100%;
  max-width: 200px;
  aspect-ratio: 5 / 6;
  object-fit: cover;
  object-position: center top;
  border-radius: 8px;
  border: 1px solid var(--line);
}

.panel-kicker {
  margin: 0 0 8px;
  color: var(--gold);
  font-weight: 850;
  font-size: 0.78rem;
  text-transform: uppercase;
}

.pi-panel h2 {
  margin: 0 0 10px;
  color: var(--blue-deep);
}

.pi-panel h2 span {
  display: block;
  color: var(--muted);
  font-size: 1rem;
  font-weight: 650;
}

.pi-panel p {
  margin: 8px 0;
  color: var(--muted);
}

.section {
  padding-top: 86px;
  padding-bottom: 86px;
}

.section-heading {
  max-width: 780px;
  margin-bottom: 28px;
}

.section-heading h2,
.join-section h2 {
  margin: 0;
  color: var(--blue-deep);
  font-size: 2rem;
  line-height: 1.18;
  letter-spacing: 0;
}

.section-heading p:not(.eyebrow),
.join-section p {
  margin: 12px 0 0;
  color: var(--muted);
}

.section-heading.with-controls {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 24px;
  max-width: none;
}

.section-heading.compact {
  margin-bottom: 18px;
}

.controls {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 10px;
}

input,
select {
  min-height: 42px;
  max-width: 100%;
  padding: 10px 12px;
  color: var(--ink);
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 6px;
  font: inherit;
}

input {
  width: 260px;
}

select {
  width: 160px;
}

.research-grid,
.repo-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.research-grid article,
.repo-card,
.feature-card,
.recognition-panel,
.timeline-item,
.publication-card,
.info-block {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.research-grid article {
  padding: 22px;
}

.research-grid span {
  color: var(--gold);
  font-weight: 850;
}

.research-grid h3,
.feature-card h3,
.recognition-panel h3,
.info-block h3 {
  margin: 10px 0 8px;
  color: var(--blue-deep);
  line-height: 1.25;
}

.research-grid p,
.feature-card p,
.repo-card p,
.timeline-item p,
.info-block li {
  color: var(--muted);
}

.split-section {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(320px, 0.6fr);
  gap: 22px;
  background: #fff;
}

.feature-stack {
  display: grid;
  gap: 14px;
}

.feature-card,
.recognition-panel,
.repo-card,
.timeline-item,
.info-block {
  padding: 20px;
}

.feature-card .tag {
  display: inline-block;
  margin: 0;
  color: var(--red);
  font-size: 0.78rem;
  font-weight: 850;
}

.recognition-panel ul,
.info-block ul {
  margin: 12px 0 0;
  padding-left: 18px;
}

.recognition-panel li + li,
.info-block li + li {
  margin-top: 10px;
}

.team-backing {
  margin-top: 14px;
  padding: 16px;
  background: #f4faf7;
  border: 1px solid #cce6dd;
  border-left: 4px solid var(--green);
  border-radius: 8px;
}

.team-backing p {
  margin: 0;
  color: #2f4058;
}

.team-backing .backing-label {
  margin-bottom: 8px;
  color: var(--green);
  font-size: 0.82rem;
  font-weight: 900;
  text-transform: uppercase;
}

.publication-list {
  display: grid;
  gap: 12px;
}

.publication-card {
  position: relative;
  display: grid;
  grid-template-columns: 58px minmax(0, 1fr);
  gap: 10px 16px;
  padding: 18px 20px;
}

.publication-number {
  grid-row: span 2;
  color: #8ba0b6;
  font-weight: 850;
}

.publication-meta,
.repo-meta,
.topic-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.publication-title {
  grid-column: 2;
  margin: 0;
  color: #26364c;
}

.badge {
  display: inline-flex;
  align-items: center;
  min-height: 24px;
  padding: 3px 8px;
  color: var(--blue-deep);
  background: #eaf2f8;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 800;
}

.badge.strong {
  color: #fff;
  background: var(--blue);
}

.badge.soft {
  color: var(--green);
  background: #e8f4ef;
}

.timeline-list {
  display: grid;
  gap: 12px;
}

.timeline-item p {
  margin: 0;
}

.repo-card {
  display: flex;
  flex-direction: column;
  min-height: 220px;
}

.repo-card a {
  color: var(--blue-deep);
  font-weight: 850;
  text-decoration: none;
  line-height: 1.25;
  overflow-wrap: anywhere;
}

.repo-card p {
  flex: 1;
  margin: 12px 0 18px;
}

.topic-row {
  margin-top: 12px;
}

.two-column {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 0.9fr);
  gap: 28px;
  background: #fff;
}

.info-block + .info-block {
  margin-top: 16px;
}

.service-group {
  margin-top: 16px;
  color: var(--blue-deep) !important;
  font-weight: 850;
  list-style: none;
}

.join-section {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  padding-top: 58px;
  padding-bottom: 58px;
  color: #fff;
  background: var(--blue-deep);
}

.join-section .eyebrow,
.join-section h2,
.join-section p {
  color: #fff;
}

.join-section div {
  max-width: 780px;
}

.join-section .button.primary {
  flex: 0 0 auto;
  background: #fff;
  color: var(--blue-deep);
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding-top: 28px;
  padding-bottom: 28px;
  color: var(--muted);
  border-top: 1px solid var(--line);
  background: var(--paper);
  font-size: 0.9rem;
}

.site-footer p {
  margin: 0;
}

@media (max-width: 1060px) {
  .hero,
  .split-section,
  .two-column {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
  }

  .pi-panel {
    grid-template-columns: 180px minmax(0, 1fr);
    align-items: center;
  }

  .research-grid,
  .repo-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 760px) {
  .site-header {
    padding: 10px 18px;
  }

  .brand small {
    display: none;
  }

  .nav-toggle {
    display: block;
    position: fixed;
    top: 14px;
    right: 18px;
    z-index: 30;
  }

  .site-nav {
    position: fixed;
    top: 64px;
    right: 18px;
    left: 18px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    padding: 10px;
    background: var(--paper);
    border: 1px solid var(--line);
    border-radius: 8px;
    box-shadow: var(--shadow);
  }

  .site-nav.is-open {
    display: flex;
  }

  .section,
  .section-band,
  .join-section,
  .site-footer {
    padding-right: 20px;
    padding-left: 20px;
  }

  .hero {
    padding-top: 28px;
    padding-bottom: 10px;
    gap: 14px;
    max-width: 100vw;
  }

  .hero *,
  .hero-copy,
  .pi-panel {
    min-width: 0;
    max-width: 100%;
  }

  .hero-copy,
  .hero-actions,
  .hero-metrics,
  .pi-panel {
    width: min(100%, 350px);
  }

  .hero h1 {
    font-size: 2.35rem;
  }

  .hero-lede {
    font-size: 0.95rem;
    overflow-wrap: break-word;
    word-break: break-all;
  }

  .hero-actions {
    gap: 8px;
    margin-top: 18px;
  }

  .hero-metrics {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 8px;
    margin-top: 16px;
    width: 100%;
    max-width: 100%;
  }

  .hero-metrics div {
    padding: 10px;
  }

  .hero-metrics dt {
    font-size: 1.34rem;
  }

  .hero-metrics dd {
    font-size: 0.78rem;
  }

  .research-grid,
  .repo-grid {
    grid-template-columns: 1fr;
  }

  .pi-panel {
    grid-template-columns: 60px minmax(0, 1fr);
    gap: 10px;
    padding: 12px;
  }

  .pi-photo {
    width: 60px;
    height: 72px;
    max-width: none;
  }

  .panel-kicker {
    margin-bottom: 4px;
    font-size: 0.68rem;
  }

  .pi-panel h2 {
    margin-bottom: 4px;
    font-size: 1.05rem;
  }

  .pi-panel h2 span,
  .pi-panel p {
    font-size: 0.76rem;
  }

  .pi-panel p {
    margin: 3px 0;
    word-break: break-all;
  }

  .section {
    padding-top: 56px;
    padding-bottom: 56px;
  }

  .section-heading.with-controls,
  .join-section,
  .site-footer {
    align-items: stretch;
    flex-direction: column;
  }

  .controls {
    justify-content: stretch;
  }

  input,
  select {
    width: 100%;
  }

  .publication-card {
    grid-template-columns: 1fr;
  }

  .publication-title {
    grid-column: 1;
  }
}