:root {
  color-scheme: light;
  --background: #ffffff;
  --bar-background: rgba(255, 255, 255, 0.92);
  --text: #343431;
  --heading: #1e1e1c;
  --muted: #73736d;
  --line: #eff0eb;
  --blue: #4257bd;
  --font-sans: "Segoe UI", -apple-system, BlinkMacSystemFont, Roboto, Helvetica, Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-serif: Constantia, Georgia, "Times New Roman", "Songti SC", SimSun, serif;
}

html[data-theme="dark"] {
  color-scheme: dark;
  --background: #181817;
  --bar-background: rgba(24, 24, 23, 0.92);
  --text: #d2d1ca;
  --heading: #f1f0e9;
  --muted: #999991;
  --line: #323230;
  --blue: #adb7ff;
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: 64px;
}

body {
  margin: 0;
  background: var(--background);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.65;
  letter-spacing: 0;
  transition: background-color 0.25s ease, color 0.25s ease;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--text);
  text-decoration-color: #9c9c98;
  text-underline-offset: 3px;
  transition: color 0.2s ease, text-decoration-color 0.2s ease;
}

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

::selection {
  background: rgba(66, 87, 189, 0.2);
  color: inherit;
}

html[data-theme="dark"] ::selection {
  background: rgba(173, 183, 255, 0.24);
}

.page-width {
  width: min(1040px, calc(100% - 56px));
  margin-inline: auto;
}

.skip-link {
  position: fixed;
  top: 6px;
  left: 6px;
  z-index: 20;
  padding: 6px 10px;
  background: var(--heading);
  color: #fff;
  transform: translateY(-150%);
}

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

.visually-hidden {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  overflow: hidden !important;
  clip: rect(0 0 0 0) !important;
  white-space: nowrap !important;
  clip-path: inset(50%) !important;
}

.icon-sprite {
  position: absolute;
  width: 0;
  height: 0;
  overflow: hidden;
}

.icon {
  width: 14px;
  height: 14px;
  flex: 0 0 auto;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.5;
  transform: translateY(-0.5px);
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  background: transparent;
  backdrop-filter: none;
  transition: background-color 0.3s ease, backdrop-filter 0.3s ease;
}

.topbar.scrolled {
  background: var(--bar-background);
  backdrop-filter: blur(12px);
}

.topbar-inner {
  display: flex;
  min-height: 62px;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s ease;
}

.topbar.scrolled .topbar-inner { border-bottom-color: var(--line); }

.nav-actions {
  display: flex;
  align-items: center;
  gap: 26px;
}

.site-name {
  color: var(--heading);
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
}

.topbar nav {
  display: flex;
  gap: 22px;
}

.topbar nav a {
  color: var(--muted);
  font-size: 14px;
  font-weight: 500;
  text-decoration: none;
}

.topbar nav a:hover { color: var(--heading); }

.theme-toggle {
  display: inline-flex;
  width: 30px;
  height: 30px;
  align-items: center;
  justify-content: center;
  padding: 0;
  border: 0;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
}

.theme-toggle .icon { width: 16px; height: 16px; transform: none; }

.theme-toggle:hover,
.theme-toggle:focus-visible {
  color: var(--heading);
}

.profile {
  display: grid;
  grid-template-columns: 184px 1fr;
  align-items: center;
  gap: 48px;
  padding: 80px 0 60px;
}

.profile > img {
  display: block;
  width: 184px;
  height: 184px;
  border: 0;
  border-radius: 6px;
  filter: saturate(0.82) contrast(1.01);
  object-fit: cover;
  box-shadow: 0 24px 48px rgba(0, 0, 0, 0.04);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

html[data-theme="dark"] .profile > img {
  box-shadow: 0 24px 48px rgba(0, 0, 0, 0.2);
}

.profile > img:hover {
  transform: translateY(-2px);
  box-shadow: 0 28px 56px rgba(0, 0, 0, 0.07);
}

html[data-theme="dark"] .profile > img:hover {
  box-shadow: 0 28px 56px rgba(0, 0, 0, 0.28);
}

.profile-info h1 {
  margin: 0 0 16px;
  color: var(--heading);
  font-size: 34px;
  font-weight: 500;
  line-height: 1.12;
  letter-spacing: 0;
}

.profile-details {
  display: grid;
  max-width: 590px;
  row-gap: 8px;
}

.profile-details p { margin: 0; }

.role,
.institution,
.research-areas {
  display: grid;
  grid-template-columns: 16px minmax(0, 1fr);
  align-items: start;
  column-gap: 10px;
}

.info-icon {
  width: 14px;
  height: 14px;
  margin-top: 0.25em;
  color: var(--muted);
  transform: none;
}

.role {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.55;
}

.institution {
  color: var(--muted);
  font-size: 14px;
  font-weight: 400;
  line-height: 1.55;
}

.research-areas {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.55;
}

.research-areas span {
  display: inline-block;
}

.profile-links {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
  margin-top: 18px;
}

.profile-links a {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 6px 11px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--text);
  font-size: 14px;
  line-height: 1.25;
  text-decoration: none;
  transition: background-color 0.2s ease, border-color 0.2s ease, color 0.2s ease, transform 0.2s ease;
}

.profile-links a:hover {
  border-color: var(--muted);
  background: var(--line);
  color: var(--heading);
  transform: translateY(-1px);
}

.profile-links .icon {
  width: 13px;
  height: 13px;
  transform: translateY(1px);
}

.pub-links a {
  background-image: linear-gradient(var(--blue), var(--blue));
  background-position: 0 100%;
  background-repeat: no-repeat;
  background-size: 0 1px;
  text-decoration: none;
  transition: background-size 0.3s ease, color 0.2s ease;
}

.pub-links a:hover {
  background-size: 100% 1px;
}

.bio {
  max-width: 960px;
  padding: 10px 0 30px;
}

.bio p {
  margin: 0 0 16px;
  font-size: 17px;
  line-height: 1.72;
}

.bio strong { color: var(--heading); }

.profile-info h1,
.bio p,
.publication h3,
.award-item h3,
.content-section h2,
.news-window-header span:first-child {
  font-family: var(--font-serif);
}

.profile-info h1,
.publication h3,
.award-item h3 {
  font-weight: 400;
}

.profile-info h1 { font-weight: 500; }

.content-section {
  padding-top: 60px;
}

.content-section h2 {
  margin: 0 0 20px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
  color: var(--heading);
  font-size: 22px;
  font-weight: 500;
  line-height: 1.28;
  letter-spacing: -0.005em;
}

/* Keep the three visible section titles on one exact vertical axis. */
#news .news-window-header > span:first-child,
#publications .section-heading h2,
#awards > #awards-title {
  margin-left: 0;
  padding-left: 0;
  text-indent: 0;
}

/* Award is a text-only section title. */
#awards > #awards-title .icon,
#awards > #awards-title::before {
  display: none !important;
  content: none !important;
}

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

.news-window {
  overflow: hidden;
  border: 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  border-radius: 0;
  background: var(--background);
}

.news-window-header {
  display: flex;
  min-height: 44px;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 0 18px 0 0;
  border-bottom: 1px solid var(--line);
}

.news-window-header span:first-child {
  color: var(--heading);
  font-size: 22px;
  font-weight: 500;
  line-height: 1.28;
  letter-spacing: -0.005em;
}

.news-window-header span:last-child {
  color: var(--muted);
  font-size: 11px;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.news-scroll {
  max-height: 245px;
  overflow-y: auto;
  overscroll-behavior: contain;
  scrollbar-color: transparent transparent;
  scrollbar-gutter: stable;
  scrollbar-width: thin;
  scroll-snap-type: y proximity;
}

.news-scroll:focus-visible {
  outline: 1px solid var(--blue);
  outline-offset: -1px;
}

.news-window:hover .news-scroll,
.news-scroll:focus-visible {
  scrollbar-color: var(--muted) transparent;
}

.news-scroll::-webkit-scrollbar { width: 6px; }
.news-scroll::-webkit-scrollbar-track { background: transparent; }
.news-scroll::-webkit-scrollbar-thumb {
  border: 2px solid var(--background);
  border-radius: 999px;
  background: transparent;
}

.news-window:hover .news-scroll::-webkit-scrollbar-thumb,
.news-scroll:focus-visible::-webkit-scrollbar-thumb {
  background: var(--muted);
}

.news-list li {
  display: grid;
  grid-template-columns: 16px 76px minmax(0, 1fr);
  gap: 12px;
  min-height: 46px;
  padding: 10px 18px;
  border-bottom: 1px solid var(--line);
  scroll-snap-align: start;
}

.news-list li:last-child { border-bottom: 0; }

.news-item-icon {
  width: 14px;
  height: 14px;
  margin-top: 4px;
  color: var(--muted);
}

.news-item-icon.important { color: var(--blue); }

.news-list time {
  padding-top: 2px;
  color: var(--muted);
  font-size: 12px;
  font-variant-numeric: tabular-nums;
}

.news-list p {
  margin: 0;
  font-size: 15px;
  line-height: 1.55;
}

.section-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 30px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--line);
}

.section-heading h2 {
  margin: 0;
  padding: 0;
  border: 0;
}

.section-heading p {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 13px;
}

.section-heading > a {
  flex: 0 0 auto;
  font-size: 13px;
}

.section-all-link,
.footer-action {
  display: inline-flex;
  align-items: center;
  gap: 5px;
}

.section-all-link .icon,
.footer-action .icon {
  width: 12px;
  height: 12px;
}

.publication-list { padding-bottom: 0; }

.publication {
  display: grid;
  grid-template-columns: 76px minmax(0, 1fr);
  gap: 20px;
  padding: 30px 0 32px;
  border-bottom: 1px solid var(--line);
}

.publication > time,
.award-item > time {
  padding-top: 2px;
  color: var(--muted);
  font-size: 12px;
  font-variant-numeric: lining-nums tabular-nums;
}

.publication h3,
.award-item h3 {
  margin: 0 0 6px;
  color: var(--heading);
  font-size: 20px;
  font-weight: 400;
  line-height: 1.36;
  letter-spacing: 0;
  text-wrap: balance;
}

.publication p { margin: 3px 0; }

.authors {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.6;
}

.authors strong {
  color: var(--heading);
  font-weight: 600;
}

.venue {
  color: var(--muted);
  font-size: 14px;
}

.award {
  margin-left: 4px;
  color: var(--muted);
  font-size: 14px;
  font-style: italic;
}

.award::before {
  content: "— ";
}

.pub-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  padding-top: 8px;
}

.pub-links a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--muted);
  font-size: 13px;
}

.pub-links .icon { width: 13px; height: 13px; }
.publication:hover .pub-links a { color: var(--text); }
.publication:hover .pub-links a:hover { color: var(--blue); }

.award-section {
  padding-bottom: 52px;
}

.award-item {
  display: grid;
  grid-template-columns: 76px 1fr;
  gap: 20px;
  padding-top: 3px;
}

.award-item h3 a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: inherit;
  text-decoration: none;
}

.award-item h3 a:hover { color: var(--blue); }

.award-star {
  width: 14px;
  height: 14px;
  color: var(--blue);
}

.award-item p {
  margin: 3px 0;
}

footer {
  color: var(--muted);
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  padding: 18px 0;
  border-top: 1px solid var(--line);
  font-size: 13px;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 8px 20px;
}

.footer-inner a {
  color: var(--muted);
  text-decoration: none;
}

.footer-inner a:hover { color: var(--blue); }

.profile,
.bio,
#news,
#publications,
#awards {
  opacity: 0;
  transform: translateY(10px);
  animation: enter-up 0.7s cubic-bezier(0.22, 1, 0.36, 1) forwards;
}

.bio { animation-delay: 0.1s; }
#news { animation-delay: 0.2s; }
#publications { animation-delay: 0.3s; }
#awards { animation-delay: 0.4s; }

@keyframes enter-up {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 620px) {
  .page-width { width: calc(100% - 36px); }
  .topbar nav { gap: 15px; }
  .topbar nav a { font-size: 12px; }
  .nav-actions { gap: 12px; }
  .profile {
    grid-template-columns: 108px 1fr;
    align-items: start;
    gap: 20px;
    padding: 40px 0 32px;
  }

  .profile > img {
    width: 108px;
    height: 108px;
    border-radius: 6px;
  }

  .profile-info h1 { margin-bottom: 12px; font-size: 27px; }

  .role { font-size: 12.5px; }
  .institution { font-size: 12.5px; }
  .profile-details { row-gap: 6px; }
  .role,
  .institution,
  .research-areas { grid-template-columns: 14px minmax(0, 1fr); column-gap: 7px; }
  .info-icon { width: 12px; height: 12px; }
  .research-areas { font-size: 12.5px; }
  .profile-links { display: flex; gap: 6px; margin-top: 13px; }
  .profile-links a { padding: 5px 8px; font-size: 12px; }
  .profile-links .icon { width: 12px; height: 12px; }
  .bio p { font-size: 16px; line-height: 1.7; }
  .content-section { padding-top: 38px; }
  .content-section h2 { font-size: 21px; }
  .news-window-header { min-height: 42px; padding: 0 14px 0 0; }
  .news-window-header span:first-child { font-size: 21px; }
  .news-window-header span:last-child { font-size: 9.5px; }
  .news-scroll { max-height: 290px; }
  .news-list li { grid-template-columns: 15px 67px minmax(0, 1fr); gap: 8px; }
  .news-list li { padding: 10px 14px; }
  .news-list time { font-size: 9.5px; }
  .news-list p { font-size: 14px; }
  .section-heading { display: block; }
  .section-heading > a { display: inline-block; margin-top: 10px; }
  .publication { grid-template-columns: 46px minmax(0, 1fr); gap: 12px; padding: 19px 0 21px; }
  .publication h3 { font-size: 18px; }
  .authors { font-size: 13.5px; }
  .venue { font-size: 13px; }
  .award { display: inline; margin: 0 0 0 3px; font-size: 12.5px; }
  .pub-links { gap: 8px 15px; }
  .pub-links a { font-size: 12.5px; }
  .award-section { padding-bottom: 42px; }
  .award-item { grid-template-columns: 46px minmax(0, 1fr); gap: 12px; }
  .publication > time,
  .award-item > time { font-size: 11px; }
  .award-item h3 { font-size: 18px; }
  .award-item p { font-size: 13px; }
  .footer-inner {
    display: block;
    padding: 18px 0;
  }
  .footer-links { justify-content: flex-start; gap: 5px 16px; margin-top: 8px; }
}

@media (max-width: 390px) {
  .profile { grid-template-columns: 94px 1fr; gap: 16px; }
  .profile > img { width: 94px; height: 94px; }
  .profile-info h1 { font-size: 24px; }
  .profile-info p { font-size: 12px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: 0.01ms !important; }
  .profile > img:hover { transform: none; }
  .profile,
  .bio,
  #news,
  #publications,
  #awards {
    opacity: 1;
    transform: none;
    animation: none;
  }
}