:root {
  color-scheme: light;
  --page-bg: #f7f9fc;
  --surface: #ffffff;
  --surface-muted: #f1f5f9;
  --text: #172033;
  --text-soft: #526077;
  --text-faint: #738096;
  --accent: #315f8c;
  --accent-strong: #21476c;
  --accent-soft: #e8f0f8;
  --border: #dbe3ec;
  --shadow: 0 18px 48px rgb(36 60 86 / 8%);
  --radius: 18px;
  font-family:
    Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI",
    "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  background: var(--page-bg);
}

body {
  margin: 0;
  color: var(--text);
  background:
    radial-gradient(circle at 15% 0%, rgb(207 225 242 / 48%), transparent 30rem),
    var(--page-bg);
  font-size: 16px;
  line-height: 1.72;
  text-rendering: optimizeLegibility;
}

html[data-language="en"] [data-lang="zh"],
html[data-language="zh"] [data-lang="en"] {
  display: none !important;
}

a {
  color: var(--accent);
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.18em;
}

a:hover {
  color: var(--accent-strong);
}

a:focus-visible,
button:focus-visible,
select:focus-visible {
  outline: 3px solid rgb(49 95 140 / 28%);
  outline-offset: 3px;
}

.skip-link {
  position: fixed;
  top: 0.75rem;
  left: 0.75rem;
  z-index: 100;
  padding: 0.55rem 0.8rem;
  border-radius: 0.5rem;
  color: white;
  background: var(--accent-strong);
  transform: translateY(-180%);
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid rgb(219 227 236 / 82%);
  background: rgb(247 249 252 / 90%);
  backdrop-filter: blur(16px);
}

.header-inner {
  display: flex;
  align-items: center;
  gap: 1.4rem;
  width: min(1040px, calc(100% - 2.4rem));
  min-height: 64px;
  margin: 0 auto;
}

.site-name {
  flex: 0 0 auto;
  color: var(--text);
  font-weight: 760;
  letter-spacing: -0.02em;
  text-decoration: none;
}

.site-nav {
  display: flex;
  flex: 1 1 auto;
  align-items: center;
  gap: 0.95rem;
  overflow-x: auto;
  scrollbar-width: none;
}

.site-nav::-webkit-scrollbar {
  display: none;
}

.site-nav a {
  flex: 0 0 auto;
  color: var(--text-soft);
  font-size: 0.88rem;
  font-weight: 570;
  text-decoration: none;
}

.site-nav a:hover {
  color: var(--accent);
}

.language-control {
  display: flex;
  flex: 0 0 auto;
  align-items: center;
  gap: 0.45rem;
  color: var(--text-soft);
  font-size: 0.82rem;
}

.language-control select {
  min-height: 36px;
  padding: 0.35rem 1.9rem 0.35rem 0.65rem;
  border: 1px solid var(--border);
  border-radius: 0.55rem;
  color: var(--text);
  background: var(--surface);
  font: inherit;
  cursor: pointer;
}

.page-shell {
  width: min(1040px, calc(100% - 2.4rem));
  margin: 0 auto;
  padding: 3.5rem 0 5rem;
}

.profile {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 190px;
  gap: 3rem;
  align-items: center;
  padding: 2.8rem;
  border: 1px solid rgb(219 227 236 / 82%);
  border-radius: var(--radius);
  background: rgb(255 255 255 / 92%);
  box-shadow: var(--shadow);
}

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

.profile h1 {
  margin: 0;
  font-family: Georgia, "Times New Roman", "Songti SC", serif;
  font-size: clamp(2.25rem, 6vw, 3.8rem);
  line-height: 1.08;
  letter-spacing: -0.035em;
}

.profile-role {
  margin: 0.8rem 0 0;
  color: var(--accent-strong);
  font-size: 1.08rem;
  font-weight: 680;
}

.profile-affiliation,
.profile-location {
  margin: 0.15rem 0 0;
  color: var(--text-soft);
}

.profile-bio {
  max-width: 48rem;
  margin-top: 1.45rem;
  color: var(--text-soft);
}

.profile-bio p {
  margin: 0.65rem 0;
}

.profile-photo {
  width: 190px;
  aspect-ratio: 1;
  border: 7px solid var(--surface);
  border-radius: 50%;
  object-fit: cover;
  box-shadow: 0 10px 34px rgb(43 67 93 / 18%);
}

.profile-contact {
  margin: 1rem 0 0;
  color: var(--text-soft);
}

.profile-links,
.entry-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem 0.9rem;
  margin-top: 1rem;
}

.profile-links a,
.entry-links a {
  font-size: 0.9rem;
  font-weight: 660;
  text-decoration: none;
}

.profile-links a::after,
.entry-links a::after {
  content: " ↗";
  font-size: 0.72em;
}

.profile-links a[href^="/"]::after,
.profile-links a[href^="#"]::after,
.entry-links a[href^="/"]::after,
.entry-links a[href^="#"]::after {
  content: "";
}

.interests {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 1.2rem 0 0;
  padding: 0;
  list-style: none;
}

.interests li {
  padding: 0.28rem 0.7rem;
  border: 1px solid #cfddea;
  border-radius: 999px;
  color: var(--accent-strong);
  background: var(--accent-soft);
  font-size: 0.82rem;
  font-weight: 610;
}

.content-section {
  margin-top: 3.7rem;
  scroll-margin-top: 90px;
}

.section-heading {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin: 0 0 1.45rem;
  font-family: Georgia, "Times New Roman", "Songti SC", serif;
  font-size: clamp(1.75rem, 4vw, 2.25rem);
  line-height: 1.2;
  letter-spacing: -0.025em;
}

.section-heading::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--border);
}

.section-intro {
  max-width: 46rem;
  margin: -0.6rem 0 1.3rem;
  color: var(--text-soft);
}

.news-list,
.timeline-list,
.publication-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.news-item {
  display: grid;
  grid-template-columns: 7rem minmax(0, 1fr);
  gap: 1rem;
  padding: 0.72rem 0;
  border-bottom: 1px solid var(--border);
}

.news-date,
.timeline-period {
  color: var(--text-faint);
  font-variant-numeric: tabular-nums;
  font-weight: 650;
}

.news-body p,
.entry-details p {
  margin: 0;
}

.publication-item,
.timeline-item {
  position: relative;
  margin-top: 1rem;
  padding: 1.35rem 1.45rem;
  border: 1px solid var(--border);
  border-radius: 0.9rem;
  background: var(--surface);
}

.publication-title,
.timeline-title {
  margin: 0;
  font-family: Georgia, "Times New Roman", "Songti SC", serif;
  font-size: 1.12rem;
  line-height: 1.4;
}

.publication-authors {
  margin: 0.55rem 0 0;
  color: var(--text-soft);
  font-size: 0.94rem;
}

.publication-authors p {
  margin: 0;
}

.publication-venue {
  margin: 0.3rem 0 0;
  color: var(--accent-strong);
  font-size: 0.92rem;
  font-weight: 680;
}

.publication-note {
  margin: 0.3rem 0 0;
  color: var(--text-faint);
  font-size: 0.9rem;
}

.timeline-item {
  display: grid;
  grid-template-columns: 9rem minmax(0, 1fr);
  gap: 1.3rem;
}

.entry-organization {
  margin: 0.35rem 0 0;
  color: var(--accent-strong);
  font-weight: 650;
}

.entry-location {
  color: var(--text-faint);
  font-weight: 500;
}

.entry-details {
  margin-top: 0.55rem;
  color: var(--text-soft);
  font-size: 0.94rem;
}

.site-footer {
  width: min(1040px, calc(100% - 2.4rem));
  margin: 0 auto;
  padding: 1.5rem 0 2.5rem;
  border-top: 1px solid var(--border);
  color: var(--text-faint);
  font-size: 0.85rem;
  text-align: center;
}

.not-found {
  display: grid;
  min-height: 75vh;
  place-items: center;
  text-align: center;
}

.not-found-card {
  max-width: 38rem;
  padding: 3rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow);
}

.not-found h1 {
  margin: 0;
  font-family: Georgia, "Times New Roman", "Songti SC", serif;
  font-size: 4rem;
}

.not-found-actions {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin-top: 1.2rem;
}

@media (max-width: 780px) {
  .header-inner {
    flex-wrap: wrap;
    gap: 0.55rem 1rem;
    padding: 0.65rem 0;
  }

  .site-nav {
    order: 3;
    flex-basis: 100%;
  }

  .language-control {
    margin-left: auto;
  }

  .page-shell {
    padding-top: 1.5rem;
  }

  .profile {
    grid-template-columns: 1fr;
    gap: 1.4rem;
    padding: 1.6rem;
  }

  .profile-photo {
    grid-row: 1;
    width: 132px;
  }

  .news-item,
  .timeline-item {
    grid-template-columns: 1fr;
    gap: 0.35rem;
  }
}

@media (max-width: 480px) {
  .header-inner,
  .page-shell,
  .site-footer {
    width: min(100% - 1.25rem, 1040px);
  }

  .site-name {
    max-width: 12rem;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  .language-label {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
  }

  .profile {
    border-radius: 0.95rem;
  }

  .publication-item,
  .timeline-item {
    padding: 1.1rem;
  }
}

@media print {
  body {
    background: white;
  }

  .site-header,
  .skip-link,
  .language-control {
    display: none;
  }

  .page-shell {
    width: 100%;
    padding: 0;
  }

  .profile,
  .publication-item,
  .timeline-item {
    break-inside: avoid;
    box-shadow: none;
  }
}