:root {
  color-scheme: light dark;
  --bg: #f5f5f7;
  --surface: rgba(255, 255, 255, 0.82);
  --surface-strong: #ffffff;
  --text: #1d1d1f;
  --muted: #5f6368;
  --faint: #86868b;
  --line: rgba(29, 29, 31, 0.12);
  --accent: #0066cc;
  --accent-strong: #004f9f;
  --focus: #2997ff;
  --radius: 8px;
  --header-height: 60px;
  --max: 1280px;
  --ease: cubic-bezier(0.2, 0.8, 0.2, 1);
}

[data-theme="dark"] {
  --bg: #000000;
  --surface: rgba(28, 28, 30, 0.82);
  --surface-strong: #161617;
  --text: #f5f5f7;
  --muted: #c7c7cc;
  --faint: #8e8e93;
  --line: rgba(245, 245, 247, 0.16);
  --accent: #2997ff;
  --accent-strong: #6bb6ff;
  --focus: #7dc4ff;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #000000;
    --surface: rgba(28, 28, 30, 0.82);
    --surface-strong: #161617;
    --text: #f5f5f7;
    --muted: #c7c7cc;
    --faint: #8e8e93;
    --line: rgba(245, 245, 247, 0.16);
    --accent: #2997ff;
    --accent-strong: #6bb6ff;
    --focus: #7dc4ff;
  }
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  background: var(--bg);
  color: var(--text);
  font-family: "Noto Sans SC", "Noto Sans CJK SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  font-size: 16px;
  line-height: 1.65;
  letter-spacing: 0;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--accent);
  text-decoration: none;
  text-underline-offset: 3px;
}

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

a:focus-visible,
button:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 3px;
}

img {
  display: block;
  max-width: 100%;
}

button {
  font: inherit;
}

.skip-link {
  position: fixed;
  z-index: 1000;
  top: 12px;
  left: 12px;
  transform: translateY(-150%);
  border-radius: var(--radius);
  background: var(--text);
  color: var(--bg);
  padding: 10px 14px;
  transition: transform 180ms var(--ease);
}

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

.site-header {
  position: fixed;
  z-index: 100;
  top: 0;
  right: 0;
  left: 0;
  height: var(--header-height);
  border-bottom: 1px solid var(--line);
  background: color-mix(in srgb, var(--surface-strong) 88%, transparent);
  backdrop-filter: saturate(180%) blur(22px);
  -webkit-backdrop-filter: saturate(180%) blur(22px);
}

.site-header[data-elevated="true"] {
  box-shadow: 0 1px 18px rgba(0, 0, 0, 0.06);
}

.nav-shell {
  width: min(calc(100% - 32px), var(--max));
  height: 100%;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.brand,
.nav-links,
.theme-toggle {
  display: inline-flex;
  align-items: center;
}

.brand {
  min-height: 44px;
  color: var(--text);
  font-size: 15px;
  font-weight: 650;
  white-space: nowrap;
}

.brand:hover {
  text-decoration: none;
}

.site-icon {
  width: 32px;
  height: 32px;
  border: 1px solid var(--line);
  border-radius: 50%;
  object-fit: cover;
  background: var(--surface-strong);
}

.nav-links {
  gap: 2px;
  padding: 4px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface);
}

.nav-links a {
  min-height: 34px;
  padding: 6px 12px;
  border-radius: 999px;
  color: var(--muted);
  font-size: 14px;
  font-weight: 520;
  transition: color 180ms var(--ease), background 180ms var(--ease);
}

.nav-links a:hover,
.nav-links a.is-active {
  background: var(--surface-strong);
  color: var(--text);
  text-decoration: none;
}

.theme-toggle {
  min-height: 44px;
  gap: 8px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface);
  color: var(--text);
  padding: 8px 13px;
  cursor: pointer;
  transition: background 180ms var(--ease), transform 180ms var(--ease);
}

.theme-toggle:hover {
  background: var(--surface-strong);
}

.theme-toggle:active {
  transform: scale(0.98);
}

.theme-toggle svg {
  width: 18px;
  height: 18px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.8;
}

.theme-toggle span {
  font-size: 14px;
  font-weight: 520;
}

.page-shell {
  width: min(calc(100% - 40px), var(--max));
  margin: 0 auto;
  padding: calc(var(--header-height) + 48px) 0 56px;
  display: grid;
  grid-template-columns: 248px minmax(0, 1fr);
  gap: 40px;
  align-items: start;
}

.profile-sidebar {
  position: sticky;
  top: calc(var(--header-height) + 28px);
}

.profile-card,
.content-section {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  backdrop-filter: saturate(160%) blur(18px);
  -webkit-backdrop-filter: saturate(160%) blur(18px);
}

.profile-card {
  padding: 22px;
}

.avatar {
  width: 120px;
  aspect-ratio: 1;
  margin: 0 auto 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  object-fit: cover;
  object-position: center 18%;
  background: var(--surface-strong);
}

.profile-heading {
  text-align: center;
}

.profile-heading h1 {
  margin: 0;
  color: var(--text);
  font-size: 28px;
  line-height: 1.16;
  letter-spacing: 0;
  font-weight: 650;
}

.affiliation-logo {
  width: 80%;
  height: auto;
  margin: 20px auto 0;
  object-fit: contain;
}

.profile-lines {
  margin: 22px 0 0;
  padding: 16px 0 0;
  border-top: 1px solid var(--line);
  list-style: none;
  display: grid;
  gap: 7px;
}

.profile-lines li {
  color: var(--text);
  font-size: 14px;
  line-height: 1.45;
  text-align: center;
}

.profile-lines li:nth-child(4) {
  margin-top: 8px;
  padding-top: 14px;
  border-top: 1px solid var(--line);
}

.contact-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px;
  margin-top: 22px;
}

.contact-list a {
  min-height: 38px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface-strong);
  color: var(--text);
  font-size: 14px;
  font-weight: 560;
  transition: border-color 180ms var(--ease), color 180ms var(--ease), transform 180ms var(--ease);
}

.contact-list a:hover {
  border-color: color-mix(in srgb, var(--accent) 44%, var(--line));
  color: var(--accent);
  text-decoration: none;
  transform: translateY(-1px);
}

.content-flow {
  display: grid;
  gap: 18px;
}

.content-section {
  padding: 26px;
  scroll-margin-top: calc(var(--header-height) + 20px);
}

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

.section-heading.with-note {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 20px;
}

.section-heading h2 {
  margin: 0;
  color: var(--text);
  font-size: 24px;
  line-height: 1.2;
  letter-spacing: 0;
}

.section-note {
  margin: 0;
  color: var(--faint);
  font-size: 13px;
  white-space: nowrap;
}

.prose {
  max-width: 82ch;
  color: var(--muted);
}

#bio .prose {
  max-width: none;
}

.prose p {
  margin: 0 0 14px;
}

.prose p:last-child {
  margin-bottom: 0;
}

.prose strong,
.authors strong,
.award-list strong {
  color: var(--text);
}

.publication-list,
.misc-list {
  display: grid;
  gap: 18px;
}

.publication-item {
  display: grid;
  grid-template-columns: 180px minmax(0, 1fr);
  gap: 20px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

.publication-item:first-child {
  padding-top: 0;
  border-top: 0;
}

.paper-thumb {
  align-self: start;
  margin-top: 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #ffffff;
  overflow: hidden;
}

.paper-thumb img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: contain;
  padding: 10px;
}

.paper-body {
  min-width: 0;
}

.venue {
  margin: 0 0 5px;
  color: var(--accent);
  font-size: 13px;
  font-weight: 700;
}

.venue.muted {
  color: var(--faint);
}

.paper-body h3,
.misc-item h3 {
  margin: 0;
  color: var(--text);
  font-size: 19px;
  line-height: 1.28;
  letter-spacing: 0;
}

.paper-body p,
.misc-item p {
  margin: 10px 0 0;
  color: var(--muted);
}

.authors {
  font-size: 14px;
  line-height: 1.55;
}

.paper-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 12px;
}

.paper-links a {
  min-height: 32px;
  display: inline-flex;
  align-items: center;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 4px 11px;
  background: var(--surface-strong);
  color: var(--accent);
  font-size: 13px;
  font-weight: 650;
}

.paper-links a:hover {
  text-decoration: none;
  border-color: color-mix(in srgb, var(--accent) 42%, var(--line));
}

.award-list {
  display: grid;
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
}

.award-list li {
  display: grid;
  grid-template-columns: 86px minmax(0, 1fr);
  gap: 18px;
  padding: 12px 0;
  border-top: 1px solid var(--line);
}

.award-list li:first-child {
  padding-top: 0;
  border-top: 0;
}

.award-list time {
  color: var(--faint);
  font-size: 13px;
  font-weight: 700;
  line-height: 1.65;
}

.award-list span {
  color: var(--muted);
}

.misc-item {
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

.misc-item:first-child {
  padding-top: 0;
  border-top: 0;
}

.media-item {
  display: grid;
  grid-template-columns: 150px minmax(0, 1fr);
  gap: 18px;
  align-items: center;
}

.media-item img {
  width: 100%;
  aspect-ratio: 1.25;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  object-fit: contain;
  padding: 10px;
  background: #ffffff;
}

.reveal {
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 360ms var(--ease), transform 360ms var(--ease);
}

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

@media (max-width: 920px) {
  .nav-links {
    display: none;
  }

  .theme-toggle span {
    display: none;
  }

  .page-shell {
    grid-template-columns: 1fr;
    gap: 18px;
    padding-top: calc(var(--header-height) + 28px);
  }

  .profile-sidebar {
    position: static;
  }

  .profile-card {
    display: grid;
    grid-template-columns: 120px minmax(0, 1fr);
    gap: 18px;
    align-items: start;
  }

  .avatar {
    width: 108px;
    margin: 0;
  }

  .profile-heading {
    text-align: left;
  }

  .profile-lines,
  .contact-list {
    grid-column: 1 / -1;
  }

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

@media (max-width: 620px) {
  :root {
    --header-height: 58px;
  }

  .nav-shell,
  .page-shell {
    width: min(calc(100% - 28px), var(--max));
  }

  .profile-card,
  .content-section {
    padding: 18px;
  }

  .profile-card,
  .publication-item,
  .media-item,
  .award-list li {
    grid-template-columns: 1fr;
  }

  .avatar {
    width: 104px;
    margin: 0 auto 18px;
  }

  .profile-heading {
    text-align: center;
  }

  .contact-list {
    grid-template-columns: 1fr;
  }

  .section-heading.with-note {
    display: block;
  }

  .section-note {
    margin-top: 6px;
    white-space: normal;
  }

  .paper-thumb,
  .media-item img {
    max-width: 220px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}