:root {
  --bg: #ffffff;
  --surface: #ffffff;
  --surface-muted: #f8f9fa;
  --text: #222222;
  --muted: #555555;
  --faint: #777777;
  --line: #eeeeee;
  --accent: #d633b8;
  --accent-hover: #a51f90;
  --footer: #1f1f1f;
  --footer-text: #d8d8d8;
  --radius: 4px;
  --content: 980px;
}

html[data-theme="dark"] {
  --bg: #111111;
  --surface: #171717;
  --surface-muted: #202020;
  --text: #eeeeee;
  --muted: #c8c8c8;
  --faint: #9b9b9b;
  --line: #303030;
  --accent: #ff66dd;
  --accent-hover: #ff94e7;
  --footer: #000000;
  --footer-text: #cfcfcf;
}

* {
  box-sizing: border-box;
}

html {
  background: var(--bg);
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.62 -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  color: var(--accent-hover);
  text-decoration: none;
}

.site-header {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 22px;
  min-height: 64px;
  padding: 0 max(22px, calc((100vw - var(--content)) / 2));
  background: var(--surface);
  border-bottom: 1px solid var(--line);
}

.brand {
  color: var(--text);
  font-size: 1.1rem;
  white-space: nowrap;
}

.brand:hover {
  color: var(--text);
}

.brand-strong {
  font-weight: 700;
}

.site-nav {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 18px;
  min-width: 0;
  font-size: 0.99rem;
}

.site-nav a {
  color: var(--text);
  white-space: nowrap;
}

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

.nav-tools {
  display: flex;
  align-items: center;
  gap: 8px;
}

.tool-button {
  min-height: 30px;
  padding: 3px 8px;
  border: 1px solid transparent;
  border-radius: var(--radius);
  background: transparent;
  color: var(--text);
  font: inherit;
  font-size: 0.9rem;
  cursor: pointer;
}

.tool-button:hover,
.tool-button:focus-visible {
  border-color: var(--accent);
  color: var(--accent);
  outline: none;
}

.search-button {
  font-size: 0.92rem;
}

.label-zh {
  display: none;
}

.zh-only {
  display: none;
}

body[data-lang="zh"] .label-en {
  display: none;
}

body[data-lang="zh"] .label-zh {
  display: inline;
}

body[data-lang="zh"] .en-only {
  display: none;
}

body[data-lang="zh"] .zh-only {
  display: inline;
}

body[data-lang="zh"] p.zh-only,
body[data-lang="zh"] .lead.zh-only {
  display: block;
}

.site-main {
  width: min(var(--content), calc(100% - 44px));
  margin: 0 auto;
  padding: 52px 0 84px;
}

.site-footer {
  position: relative;
  display: flex;
  justify-content: center;
  gap: 8px;
  min-height: 42px;
  padding: 11px 20px;
  background: var(--footer);
  color: var(--footer-text);
  font-size: 0.82rem;
  text-align: center;
}

.site-footer span + span::before {
  content: " ";
}

h1,
h2,
h3 {
  margin-top: 0;
  color: var(--text);
  font-weight: 400;
  line-height: 1.25;
}

h1 {
  margin-bottom: 12px;
  font-size: 2.45rem;
}

.name-line {
  color: var(--text);
  font-size: inherit;
}

.name-line small {
  color: var(--muted);
  font-size: 0.56em;
  font-weight: 400;
}

h2 {
  margin: 34px 0 12px;
  font-size: 1.75rem;
}

h3 {
  margin: 0 0 8px;
  font-size: 1.18rem;
}

p {
  margin: 0 0 18px;
}

.muted,
.page-description,
.lead,
.card p,
.project-card p,
.activity-card p,
.repo-card p,
.teaching-card p,
.post-preview p,
.publication-item p,
.award-item p,
.caption {
  color: var(--muted);
}

.eyebrow {
  margin: 0 0 6px;
  color: var(--faint);
  font-size: 0.92rem;
}

.about-hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 270px;
  gap: 42px;
  align-items: start;
}

.about-copy h1 {
  font-size: 2.55rem;
}

.lead {
  max-width: 620px;
  font-size: 1rem;
}

.profile-panel {
  display: grid;
  gap: 12px;
  color: var(--muted);
  font-size: 0.92rem;
}

.profile-panel img {
  width: 100%;
  border-radius: var(--radius);
}

.profile-panel strong {
  display: block;
  color: var(--text);
  font-weight: 600;
}

.link-row,
.resource-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 18px 0 0;
}

.link-row a,
.button-link,
.outline-link {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  padding: 5px 11px;
  border: 1px solid var(--accent);
  border-radius: 999px;
  color: var(--accent);
  font-weight: 600;
  font-size: 0.9rem;
}

.social-icons {
  align-items: center;
}

.social-icons a {
  justify-content: center;
  width: 34px;
  min-height: 34px;
  padding: 0;
  border-color: var(--line);
  color: var(--text);
}

.social-icons a:hover {
  border-color: var(--accent);
  background: var(--surface);
  color: var(--accent);
}

.social-icons svg {
  width: 18px;
  height: 18px;
  fill: currentColor;
}

.social-icons span {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

.link-row a:hover,
.button-link:hover,
.outline-link:hover {
  background: var(--accent);
  color: #ffffff;
}

.link-row.social-icons a:hover {
  border-color: var(--accent);
  background: var(--surface);
  color: var(--accent);
}

.section-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 28px;
  margin-top: 42px;
}

.section-grid > div,
.page-content > .panel {
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

.clean-list {
  margin: 0;
  padding-left: 20px;
}

.page-header {
  margin-bottom: 30px;
}

.page-header h1 {
  margin-bottom: 8px;
  font-size: 2.35rem;
  text-transform: lowercase;
}

.page-content {
  max-width: 760px;
}

.preview-section {
  margin-top: 46px;
}

.section-heading {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 20px;
  border-bottom: 1px solid var(--line);
}

.section-heading h2 {
  margin-bottom: 10px;
}

.feature-card,
.project-card,
.activity-card,
.award-item,
.repo-card,
.teaching-card,
.post-preview,
.publication-item,
.card {
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

.feature-card {
  display: grid;
  grid-template-columns: 250px minmax(0, 1fr);
  gap: 22px;
  align-items: start;
}

.feature-card img,
.content-image {
  width: 100%;
  border-radius: var(--radius);
}

.grid-list,
.project-grid,
.activity-grid,
.award-list,
.repo-list,
.teaching-list,
.post-list,
.bibliography-list {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
}

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

.award-item time,
.meta,
.post-date,
.tag {
  color: var(--faint);
  font-size: 0.9rem;
}

.meta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: -12px 0 22px;
}

.meta-row span,
.tag,
.repo-card span {
  display: inline-flex;
  padding: 2px 8px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface-muted);
  color: var(--faint);
  font-size: 0.82rem;
}

.image-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  margin: 24px 0;
}

figure {
  margin: 0;
}

.caption {
  margin-top: 6px;
  font-size: 0.9rem;
}

table {
  width: 100%;
  border-collapse: collapse;
}

th,
td {
  padding: 10px 8px 10px 0;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

th {
  color: var(--faint);
  font-weight: 600;
}

.search-overlay {
  position: fixed;
  inset: 0;
  z-index: 40;
  display: grid;
  place-items: start center;
  padding-top: 12vh;
  background: rgba(0, 0, 0, 0.42);
}

.search-overlay[hidden] {
  display: none;
}

.search-dialog {
  width: min(680px, calc(100vw - 32px));
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: 0 22px 80px rgba(0, 0, 0, 0.22);
}

.search-head {
  display: flex;
  gap: 10px;
  padding: 14px;
  border-bottom: 1px solid var(--line);
}

.search-head input {
  flex: 1;
  min-width: 0;
  border: 0;
  background: transparent;
  color: var(--text);
  font: inherit;
  font-size: 1.06rem;
  outline: none;
}

.search-results {
  max-height: 50vh;
  overflow: auto;
  padding: 10px;
}

.search-hit {
  display: grid;
  gap: 4px;
  padding: 10px;
  border-radius: var(--radius);
  color: var(--text);
}

.search-hit:hover {
  background: var(--surface-muted);
}

.search-hit span {
  color: var(--muted);
  font-size: 0.9rem;
}

@media (max-width: 920px) {
  .site-header {
    grid-template-columns: 1fr;
    gap: 10px;
    padding-top: 14px;
    padding-bottom: 14px;
  }

  .site-nav {
    justify-content: flex-start;
    flex-wrap: wrap;
  }

  .nav-tools {
    justify-content: flex-start;
  }

  .about-hero,
  .section-grid,
  .feature-card,
  .award-list.compact,
  .image-row {
    grid-template-columns: 1fr;
  }

  .profile-panel {
    max-width: 280px;
  }

  .site-footer {
    flex-direction: column;
  }
}