:root {
  color-scheme: light;
  --ink: #142329;
  --muted: #5c6e73;
  --soft: #eef7f6;
  --line: #dce9e7;
  --blue: #1f5f8b;
  --green: #1b7c6b;
  --white: #ffffff;
  --shadow: 0 18px 50px rgba(20, 35, 41, 0.1);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: #fbfdfc;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans SC", "PingFang SC",
    "Microsoft YaHei", sans-serif;
  line-height: 1.7;
}

a {
  color: inherit;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: grid;
  grid-template-columns: 1fr auto auto;
  align-items: center;
  gap: 24px;
  padding: 16px clamp(20px, 5vw, 64px);
  background: rgba(251, 253, 252, 0.92);
  border-bottom: 1px solid rgba(220, 233, 231, 0.75);
  backdrop-filter: blur(16px);
}

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

.brand-mark {
  display: grid;
  width: 40px;
  height: 40px;
  place-items: center;
  border-radius: 50%;
  color: var(--white);
  background: linear-gradient(135deg, var(--blue), var(--green));
  font-weight: 700;
}

.brand-name,
.brand-role {
  display: block;
}

.brand-name {
  font-weight: 700;
  line-height: 1.2;
}

.brand-role {
  color: var(--muted);
  font-size: 0.82rem;
  line-height: 1.35;
}

.nav-links {
  display: flex;
  gap: 20px;
  color: var(--muted);
  font-size: 0.94rem;
}

.nav-links a {
  text-decoration: none;
}

.language-toggle,
.button {
  min-height: 42px;
  border: 1px solid var(--line);
  border-radius: 8px;
  font: inherit;
  font-weight: 700;
}

.language-toggle {
  padding: 0 16px;
  color: var(--blue);
  background: var(--white);
  cursor: pointer;
}

.section {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
  padding: 80px 0;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(300px, 0.8fr);
  align-items: center;
  gap: clamp(32px, 6vw, 72px);
  min-height: calc(100vh - 74px);
  padding-top: 56px;
}

.eyebrow,
.section-kicker {
  margin: 0 0 12px;
  color: var(--green);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

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

h1 {
  margin-bottom: 20px;
  font-size: clamp(3rem, 8vw, 6.6rem);
  line-height: 0.96;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 16px;
  font-size: clamp(2rem, 4vw, 3.4rem);
  line-height: 1.1;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 12px;
  font-size: 1.12rem;
}

.hero-subtitle {
  max-width: 720px;
  color: #304950;
  font-size: clamp(1.1rem, 2.1vw, 1.55rem);
  line-height: 1.55;
}

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

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 18px;
  text-decoration: none;
}

.button.primary {
  color: var(--white);
  background: var(--blue);
  border-color: var(--blue);
}

.button.secondary {
  color: var(--blue);
  background: var(--white);
}

.profile-panel,
.card,
.research-card,
.contact-card {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
  box-shadow: var(--shadow);
}

.profile-panel {
  padding: 24px;
}

.portrait-photo {
  width: 100%;
  aspect-ratio: 4 / 5;
  margin-bottom: 22px;
  border-radius: 8px;
  border: 1px solid var(--line);
  object-fit: cover;
  object-position: 50% 40%;
}

.profile-name {
  margin-bottom: 6px;
  font-size: 1.25rem;
  font-weight: 800;
}

.profile-detail {
  color: var(--muted);
}

.quick-facts {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 18px;
}

.quick-facts span {
  padding: 6px 10px;
  border-radius: 999px;
  color: #164a43;
  background: var(--soft);
  font-size: 0.86rem;
  font-weight: 700;
}

.two-column {
  display: grid;
  grid-template-columns: 0.7fr 1.3fr;
  gap: clamp(24px, 6vw, 72px);
  border-top: 1px solid var(--line);
}

.section-body {
  color: #304950;
  font-size: 1.08rem;
}

.service-band {
  width: 100%;
  max-width: none;
  padding-right: clamp(20px, 5vw, 64px);
  padding-left: clamp(20px, 5vw, 64px);
  background: linear-gradient(180deg, var(--soft), #ffffff);
}

.section-heading {
  width: min(1120px, 100%);
  margin: 0 auto 28px;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  width: min(1120px, 100%);
  margin: 0 auto;
}

.card {
  padding: 24px;
}

.card p,
.research-card p,
.timeline p,
.disclaimer {
  color: var(--muted);
}

.text-link {
  color: var(--blue);
  font-weight: 800;
  text-decoration: none;
}

.qr-link {
  display: grid;
  width: 148px;
  gap: 10px;
  margin: 18px 0;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--blue);
  background: #ffffff;
  font-size: 0.82rem;
  font-weight: 800;
  line-height: 1.35;
  text-align: center;
  text-decoration: none;
}

.qr-code {
  display: block;
  width: 100%;
  aspect-ratio: 1;
  border-radius: 4px;
}

.research-layout {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: 18px;
}

.research-card {
  padding: 28px;
}

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

.research-list div {
  display: grid;
  grid-template-columns: 58px 1fr;
  gap: 16px;
  align-items: start;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}

.research-list p {
  margin-bottom: 0;
  font-size: 1.04rem;
  font-weight: 700;
}

.number {
  color: var(--green);
  font-size: 0.82rem;
  font-weight: 800;
}

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

.timeline {
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line);
}

.timeline-item {
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: 24px;
  padding: 22px 0;
  border-bottom: 1px solid var(--line);
}

.timeline-item span {
  color: var(--green);
  font-weight: 800;
}

.timeline-item p {
  margin-bottom: 0;
}

.contact-section {
  display: grid;
  grid-template-columns: 1fr 0.85fr;
  gap: 24px;
  align-items: start;
}

.contact-card {
  display: grid;
  gap: 10px;
  padding: 22px;
}

.contact-card a,
.contact-card span {
  display: flex;
  align-items: center;
  min-height: 48px;
  padding: 0 14px;
  border-radius: 8px;
  background: var(--soft);
  color: var(--blue);
  font-weight: 800;
  text-decoration: none;
  overflow-wrap: anywhere;
}

.contact-card span {
  color: var(--muted);
  cursor: default;
}

.contact-card .institution-note {
  min-height: 0;
  padding: 10px 14px;
  color: var(--muted);
  font-size: 0.86rem;
  font-weight: 600;
  line-height: 1.55;
}

.disclaimer {
  max-width: 680px;
}

.site-footer {
  padding: 28px 20px 44px;
  color: var(--muted);
  text-align: center;
}

@media (max-width: 820px) {
  .site-header {
    grid-template-columns: 1fr auto;
    gap: 12px;
  }

  .nav-links {
    display: none;
  }

  .hero,
  .two-column,
  .research-layout,
  .contact-section {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
  }

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

  .timeline-item {
    grid-template-columns: 1fr;
    gap: 4px;
  }
}

@media (max-width: 520px) {
  .site-header {
    padding: 12px 16px;
  }

  .brand-mark {
    width: 36px;
    height: 36px;
  }

  .brand-role {
    display: none;
  }

  .section {
    width: min(100% - 32px, 1120px);
    padding: 56px 0;
  }

  .service-band {
    padding-right: 16px;
    padding-left: 16px;
  }

  h1 {
    font-size: 3.4rem;
  }

  .hero-actions {
    display: grid;
  }

  .button,
  .language-toggle {
    width: 100%;
  }
}