:root {
  --ink: #17202a;
  --text: #2f3a45;
  --muted: #687789;
  --line: #dfe7ef;
  --panel: #f7fafc;
  --blue: #124f8f;
  --blue-soft: #e8f1fb;
  --orange: #c85f24;
  --green: #1f7a5b;
  --red: #b83232;
  --gold: #a36a12;
  --bg: #ffffff;
  --shadow: 0 10px 28px rgba(23, 32, 42, 0.08);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.72;
}

a {
  color: var(--blue);
  text-decoration: none;
  transition: color 0.2s ease, border-color 0.2s ease, background 0.2s ease, transform 0.2s ease;
}

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

nav {
  position: sticky;
  top: 0;
  z-index: 50;
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(14px);
}

.nav-inner {
  align-items: center;
  display: flex;
  height: 62px;
  justify-content: space-between;
  margin: 0 auto;
  max-width: 1020px;
  padding: 0 34px;
}

.nav-name {
  color: var(--ink);
  font-family: "Crimson Pro", Georgia, serif;
  font-size: 22px;
  font-weight: 700;
}

.nav-links {
  align-items: center;
  display: flex;
  gap: 24px;
  white-space: nowrap;
}

.nav-links a {
  color: var(--muted);
  font-size: 14px;
  font-weight: 600;
  position: relative;
}

.nav-links a::after {
  background: var(--orange);
  bottom: -7px;
  content: "";
  height: 2px;
  left: 0;
  position: absolute;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.2s ease;
  width: 100%;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--ink);
}

.nav-links a:hover::after,
.nav-links a.active::after {
  transform: scaleX(1);
}

.container {
  margin: 0 auto;
  max-width: 1020px;
  padding: 0 34px;
}

section { padding-top: 48px; }

.hero {
  align-items: flex-start;
  display: grid;
  gap: 54px;
  grid-template-columns: 220px 1fr;
  padding: 62px 0 20px;
}

.hero-photo {
  align-items: center;
  display: flex;
  flex-direction: column;
}

.hero-photo > img {
  border: 3px solid var(--line);
  border-radius: 50%;
  box-shadow: var(--shadow);
  height: 220px;
  object-fit: cover;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  width: 220px;
}

.hero-photo > img:hover {
  box-shadow: 0 14px 34px rgba(18, 79, 143, 0.18);
  transform: translateY(-3px) scale(1.02);
}

.eyebrow {
  color: var(--orange);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.08em;
  margin-bottom: 4px;
  text-transform: uppercase;
}

h1,
.section-title {
  color: var(--ink);
  font-family: "Crimson Pro", Georgia, serif;
  font-weight: 700;
  line-height: 1.12;
}

h1 {
  font-size: 46px;
  margin-bottom: 8px;
}

.subtitle {
  color: var(--muted);
  font-size: 16px;
  margin-bottom: 18px;
}

.hero-bio {
  max-width: 690px;
  margin-bottom: 18px;
}

.hello {
  color: var(--muted);
  font-family: "Crimson Pro", Georgia, serif;
  font-size: 19px;
  margin-bottom: 12px;
}

.hero-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 18px 0 14px;
}

.hero-badges {
  align-items: center;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: center;
  margin-top: 16px;
  max-width: 220px;
}

.hero-badges a,
.hero-badges img {
  display: block;
}

.hero-badges a {
  border: 1px solid var(--line);
  border-radius: 999px;
  box-shadow: 0 4px 10px rgba(23, 32, 42, 0.06);
  overflow: hidden;
  transition: border-color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
}

.hero-badges a:hover {
  box-shadow: 0 8px 18px rgba(18, 79, 143, 0.12);
  transform: translateY(-1px);
}

.badge-github { border-color: rgba(24, 23, 23, 0.38); }
.badge-zhihu { border-color: rgba(0, 132, 255, 0.42); }
.badge-rednote { border-color: rgba(255, 36, 66, 0.42); }
.badge-bilibili { border-color: rgba(0, 174, 236, 0.42); }
.badge-steam { border-color: rgba(19, 67, 117, 0.42); }

.badge-github:hover { border-color: #181717; }
.badge-zhihu:hover { border-color: #0084ff; }
.badge-rednote:hover { border-color: #ff2442; }
.badge-bilibili:hover { border-color: #00aeec; }
.badge-steam:hover { border-color: #134375; }

.hero-badges img {
  border-radius: 999px;
  height: 20px;
}

.pill-link,
.pub-link,
.filter-btn {
  align-items: center;
  border: 1.5px solid var(--blue);
  border-radius: 999px;
  display: inline-flex;
  font-weight: 700;
  gap: 7px;
}

.pill-link {
  color: var(--blue);
  font-size: 13px;
  padding: 7px 14px;
}

.pill-logo {
  display: inline-block;
  flex: 0 0 auto;
  height: 1em;
  width: 1em;
}

.pill-link:hover,
.pub-link:hover,
.filter-btn:hover,
.filter-btn.active {
  background: var(--blue);
  color: #fff;
  transform: translateY(-1px);
}

.pill-link:hover .pill-logo {
  filter: brightness(0) invert(1);
}

.status-banner {
  background: linear-gradient(135deg, #fff8ec, #fff1df);
  border-left: 4px solid var(--orange);
  border-radius: 7px;
  color: #7a3c12;
  display: inline-block;
  font-size: 14px;
  font-weight: 700;
  padding: 9px 16px;
}

.interest-grid {
  display: grid;
  gap: 10px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  padding-top: 12px;
}

.research-lead {
  color: var(--muted);
  font-size: 15px;
  font-weight: 600;
  margin-top: 26px;
  max-width: 740px;
}

.interest-card {
  background: var(--panel);
  border-left: 3px solid var(--blue);
  border-radius: 7px;
  padding: 13px 16px;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.interest-card:hover,
.timeline-item:hover,
.pub-item:hover,
.award-item:hover,
.fun-fact:hover {
  box-shadow: var(--shadow);
  transform: translateY(-2px);
}

.interest-card strong { color: var(--ink); }

.section-title {
  border-bottom: 2px solid var(--ink);
  display: inline-block;
  font-size: 30px;
  margin-bottom: 24px;
  padding-bottom: 8px;
}

.timeline {
  display: grid;
  gap: 0;
}

.timeline-item {
  align-items: center;
  border-bottom: 1px solid var(--line);
  border-radius: 8px;
  display: grid;
  gap: 22px;
  grid-template-columns: 86px 1fr;
  padding: 18px 12px;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.timeline-item:hover { background: var(--panel); }

.timeline-logo {
  align-items: center;
  display: flex;
  height: 74px;
  justify-content: center;
  width: 74px;
}

.timeline-logo img {
  max-height: 68px;
  max-width: 76px;
  object-fit: contain;
}

.timeline-content h3 {
  color: var(--ink);
  font-size: 17px;
  line-height: 1.35;
  margin-bottom: 3px;
}

.timeline-entry + .timeline-entry {
  margin-top: 7px;
  padding-top: 7px;
  position: relative;
}

.timeline-entry + .timeline-entry::before {
  background: #edf2f7;
  content: "";
  height: 1px;
  left: 0;
  position: absolute;
  top: 0;
  width: min(220px, 42%);
}

.timeline-date {
  color: var(--muted);
  font-size: 14px;
  font-weight: 700;
}

.timeline-detail {
  font-size: 14.5px;
  margin-top: 5px;
}

.news-container {
  border: 1px solid var(--line);
  border-radius: 8px;
  max-height: 330px;
  overflow-y: auto;
  padding: 8px;
}

.news-item {
  border-bottom: 1px solid #edf2f7;
  border-radius: 6px;
  display: grid;
  font-size: 15px;
  gap: 20px;
  grid-template-columns: 96px 1fr;
  padding: 10px 10px;
}

.news-item:last-child { border-bottom: 0; }
.news-item:hover { background: var(--panel); }

.news-date {
  color: var(--muted);
  font-size: 14px;
  font-weight: 800;
}

.pub-note {
  color: var(--muted);
  font-size: 14px;
  font-style: italic;
  margin: -8px 0 18px;
}

.pub-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 20px;
}

.filter-btn {
  background: #fff;
  color: var(--blue);
  cursor: pointer;
  font-family: inherit;
  font-size: 13px;
  padding: 6px 13px;
}

.filter-btn.filter-hidden {
  display: none;
}

.filter-count {
  font-size: 11px;
  opacity: 0.75;
}

.pub-list {
  list-style: none;
}

.pub-item {
  border-bottom: 1px solid #edf2f7;
  border-radius: 8px;
  display: block;
  padding: 18px 12px;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease, opacity 0.2s ease;
}

.pub-item.hidden { display: none; }

html:not(.js-ready) #pubList .pub-item:nth-child(n+11) {
  display: none;
}

html:not(.js-ready) #pubFilter .filter-btn:nth-child(n+20) {
  display: none;
}

.pub-show-all {
  background: var(--ink);
  border: 0;
  border-radius: 999px;
  color: #fff;
  cursor: pointer;
  display: none;
  font-size: 14px;
  font-weight: 700;
  margin: 18px auto 0;
  padding: 10px 18px;
  transition: background 0.2s ease, transform 0.2s ease;
}

.pub-show-all:hover {
  background: var(--blue);
  transform: translateY(-1px);
}

html:not(.js-ready) .pub-show-all { display: block; }

.pub-show-all.visible { display: block; }

.pub-title {
  color: var(--ink);
  font-size: 16px;
  font-weight: 800;
  line-height: 1.45;
}

.pub-title:hover { color: var(--blue); }

.pub-authors,
.pub-venue,
.pub-insight {
  font-size: 14px;
  margin-top: 5px;
}

.pub-authors {
  color: var(--muted);
}

.me {
  color: var(--ink);
  font-weight: 800;
  text-decoration: underline;
  text-decoration-color: var(--orange);
  text-underline-offset: 2px;
}

.pub-venue em {
  color: var(--text);
  font-style: normal;
  font-weight: 700;
}

.pub-insight {
  background: var(--blue-soft);
  border-left: 3px solid var(--blue);
  border-radius: 0 5px 5px 0;
  color: #405368;
  padding: 6px 10px;
}

.pub-links,
.pub-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 9px;
}

.pub-link {
  color: var(--blue);
  font-size: 12px;
  padding: 3px 10px;
}

.tag {
  border-radius: 999px;
  display: inline-block;
  font-size: 12px;
  font-weight: 800;
  padding: 2px 9px;
}

.tag-llm { background: #fff7d6; color: #705400; }
.tag-agent { background: #f0ecff; color: #5b3aa4; }
.tag-harness { background: #eaf7ff; color: #21617f; }
.tag-trustworthy-ai { background: #e9f8f7; color: #136c68; }
.tag-graph { background: #e6f4ff; color: #124f8f; }
.tag-time-series { background: #e8f6ef; color: #1f7a5b; }
.tag-multimodal { background: #f6eafb; color: #6d347c; }
.tag-ensemble { background: #f7ecff; color: #6b2da1; }
.tag-benchmarking { background: #eef7e8; color: #456b16; }
.tag-class-imbalance { background: #fff3e0; color: #935214; }
.tag-fairness { background: #fdeff7; color: #9a3569; }
.tag-recommender-systems { background: #edf5ff; color: #2c5f99; }

.awards-grid,
.fun-facts-grid {
  display: grid;
  gap: 10px;
}

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

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

.award-item,
.fun-fact {
  background: var(--panel);
  border-left: 3px solid var(--orange);
  border-radius: 8px;
  font-size: 15px;
  padding: 14px 16px;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.award-item strong,
.fun-fact strong {
  color: var(--ink);
}

.fun-facts-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.fun-fact {
  border-left-color: var(--green);
  line-height: 1.65;
}

.gallery-grid {
  display: grid;
  gap: 10px;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  padding-top: 2px;
}

.gallery-heading {
  align-items: center;
  display: flex;
  gap: 14px;
  justify-content: space-between;
  margin-bottom: 24px;
}

.gallery-heading .section-title {
  margin-bottom: 0;
}

.gallery-view-toggle {
  background: #f4f8fc;
  border: 1px solid var(--line);
  border-radius: 999px;
  display: flex;
  gap: 2px;
  padding: 3px;
}

.gallery-view-toggle button {
  background: transparent;
  border: 0;
  border-radius: 999px;
  color: var(--muted);
  cursor: pointer;
  font-family: inherit;
  font-size: 13px;
  font-weight: 700;
  padding: 6px 12px;
}

.gallery-view-toggle button.active {
  background: #fff;
  color: var(--blue);
  box-shadow: 0 2px 8px rgba(12, 44, 77, 0.08);
}

.gallery-item {
  aspect-ratio: 1;
  background: transparent;
  border: 2px solid var(--line);
  border-radius: 8px;
  cursor: pointer;
  overflow: hidden;
  padding: 0;
  position: relative;
  transition: border-color 0.18s ease, transform 0.18s ease;
}

.gallery-item:hover {
  border-color: rgba(18, 79, 143, 0.45);
  transform: translateY(-1px);
}

.gallery-item img {
  display: block;
  height: 100%;
  object-fit: cover;
  width: 100%;
}

.gallery-item span {
  align-items: end;
  background: linear-gradient(transparent, rgba(0, 0, 0, 0.58));
  color: #fff;
  display: flex;
  font-size: 12px;
  font-weight: 700;
  inset: 0;
  justify-content: center;
  opacity: 1;
  padding: 10px;
  position: absolute;
  text-align: center;
  transition: opacity 0.18s ease;
}

.gallery-item:hover span { opacity: 1; }

.gallery-city-card {
  --city-overlay-opacity: 0.28;
  background: #f5f9fc;
  border-color: rgba(18, 79, 143, 0.18);
  color: var(--ink);
}

.gallery-city-card::after {
  background: rgba(0, 0, 0, var(--city-overlay-opacity));
  content: "";
  inset: 0;
  position: absolute;
  transition: background 0.2s ease;
}

.gallery-city-card .gallery-city-label {
  align-items: center;
  background: transparent;
  color: #fff;
  display: flex;
  flex-direction: column;
  font-family: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 17px;
  font-weight: 800;
  gap: 3px;
  inset: 0;
  justify-content: center;
  line-height: 1.2;
  opacity: 1;
  padding: 18px;
  position: absolute;
  text-align: center;
  text-shadow: 0 1px 3px rgba(0, 0, 0, 0.72), 0 4px 18px rgba(0, 0, 0, 0.70), 0 0 42px rgba(0, 0, 0, 0.46);
  transition: transform 0.18s ease;
  z-index: 2;
}

.gallery-city-card .gallery-city-region {
  background: transparent;
  display: block;
  font-size: 12px;
  font-weight: 700;
  inset: auto;
  opacity: 1;
  padding: 0;
  position: static;
  transition: none;
}

.gallery-city-card .gallery-city-title {
  font-size: 17px;
  font-weight: 800;
}

.gallery-city-card .gallery-city-label span {
  background: transparent;
  display: block;
  inset: auto;
  opacity: 1;
  padding: 0;
  position: static;
  transition: none;
}

.gallery-city-card .gallery-city-meta {
  align-items: center;
  background: transparent;
  color: #fff;
  display: flex;
  flex-direction: column;
  font-size: 12px;
  font-weight: 700;
  gap: 2px;
  inset: 0;
  justify-content: center;
  opacity: 0;
  padding: 64px 10px 10px;
  position: absolute;
  text-align: center;
  text-shadow: 0 1px 3px rgba(0, 0, 0, 0.76), 0 4px 16px rgba(0, 0, 0, 0.70), 0 0 38px rgba(0, 0, 0, 0.44);
  transition: opacity 0.18s ease, transform 0.18s ease;
  transform: translateY(8px);
  z-index: 2;
}

.gallery-city-card .gallery-city-meta span {
  background: transparent;
  display: block;
  inset: auto;
  opacity: 1;
  padding: 0;
  position: static;
  transition: none;
}

.gallery-city-card:hover .gallery-city-label { transform: translateY(-18px); }

.gallery-city-card:hover .gallery-city-meta {
  opacity: 1;
  transform: translateY(0);
}

.gallery-actions {
  display: none;
  gap: 10px;
  justify-content: center;
  margin-top: 18px;
}

.gallery-actions.visible { display: flex; }

.gallery-show-more,
.gallery-show-all,
.gallery-show-all-locations {
  background: var(--ink);
  border: 0;
  border-radius: 999px;
  color: #fff;
  cursor: pointer;
  font-size: 14px;
  font-weight: 700;
  padding: 10px 18px;
  transition: background 0.2s ease, transform 0.2s ease;
}

.gallery-show-more:hover,
.gallery-show-all:hover,
.gallery-show-all-locations:hover {
  background: var(--blue);
  transform: translateY(-1px);
}

.lightbox {
  align-items: center;
  background: rgba(0, 0, 0, 0.92);
  display: none;
  flex-direction: column;
  inset: 0;
  justify-content: center;
  position: fixed;
  z-index: 999;
}

.lightbox.active { display: flex; }

.lightbox img {
  background: #fff;
  border: clamp(18px, 4.8vw, 36px) solid #fff;
  border-radius: 8px;
  box-shadow: 0 18px 48px rgba(0, 0, 0, 0.36);
  cursor: pointer;
  max-height: min(80vh, calc(100vh - 120px));
  max-width: 86vw;
  object-fit: contain;
}

.lightbox img.portrait {
  border-width: clamp(8px, 2.4vw, 18px);
  max-height: min(84vh, calc(100vh - 120px));
  max-width: 82vw;
}

@media (max-width: 640px) {
  .lightbox img,
  .lightbox img.portrait {
    border-width: 0;
    max-height: calc(100vh - 110px);
    max-width: 94vw;
  }
}

.lightbox button {
  background: transparent;
  border: 0;
  color: #fff;
  cursor: pointer;
  opacity: 0.78;
  position: absolute;
  transition: left 0.18s ease, opacity 0.2s ease, right 0.18s ease, transform 0.18s ease;
  z-index: 1001;
}

.lightbox button:hover { opacity: 1; }

.lightbox-close {
  align-items: center;
  border-radius: 50%;
  display: inline-flex;
  height: 54px;
  font-size: 34px;
  justify-content: center;
  line-height: 1;
  right: 36px;
  top: 28px;
  transform: scale(1);
  width: 54px;
}

.lightbox-prev {
  font-size: 68px;
  left: 18px;
  top: 50%;
  transform: translateY(-50%) scale(1);
}

.lightbox-next {
  font-size: 68px;
  right: 18px;
  top: 50%;
  transform: translateY(-50%) scale(1);
}

.lightbox.hint-prev .lightbox-prev,
.lightbox.flash-prev .lightbox-prev {
  left: var(--lightbox-prev-edge, 18px);
  opacity: 1;
  transform: translateY(-50%) scale(1.6);
}

.lightbox.hint-next .lightbox-next,
.lightbox.flash-next .lightbox-next {
  opacity: 1;
  right: var(--lightbox-next-edge, 18px);
  transform: translateY(-50%) scale(1.6);
}

.lightbox-prev:hover,
.lightbox-prev.arrow-flash {
  opacity: 1;
  transform: translateY(-50%) scale(1.6);
}

.lightbox-next:hover,
.lightbox-next.arrow-flash {
  opacity: 1;
  transform: translateY(-50%) scale(1.6);
}

.lightbox.hint-close .lightbox-close {
  background: rgba(255, 255, 255, 0.14);
  box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.34), 0 10px 30px rgba(0, 0, 0, 0.38);
  opacity: 1;
  transform: scale(1.18);
}

.lightbox-caption {
  color: rgba(255, 255, 255, 0.72);
  font-size: 14px;
  margin-top: 12px;
}

.back-to-top {
  align-items: center;
  background: var(--blue);
  border: 0;
  border-radius: 50%;
  bottom: 28px;
  box-shadow: 0 8px 20px rgba(18, 79, 143, 0.28);
  color: #fff;
  cursor: pointer;
  display: flex;
  height: 42px;
  justify-content: center;
  opacity: 0;
  position: fixed;
  right: 28px;
  transform: translateY(8px);
  transition: opacity 0.2s ease, transform 0.2s ease;
  width: 42px;
  z-index: 45;
}

.back-to-top.visible {
  opacity: 1;
  transform: translateY(0);
}

footer {
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 14px;
  margin-top: 54px;
  padding: 34px 0 40px;
  text-align: center;
}

.site-analytics {
  align-items: center;
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 24px;
}

#visitorMapMount {
  max-width: 100%;
  width: 600px;
}

#visitorMapMount #mapmyvisitors-widget {
  max-width: 100%;
}

.visitor-map-fallback {
  color: var(--muted);
  font-size: 13px;
}

@media (max-width: 860px) {
  .nav-inner {
    align-items: flex-start;
    flex-direction: column;
    gap: 8px;
    height: auto;
    padding-bottom: 12px;
    padding-top: 12px;
  }

  .nav-links {
    gap: 14px;
    overflow-x: auto;
    padding-bottom: 3px;
    width: 100%;
  }

  .hero {
    grid-template-columns: 1fr;
    gap: 24px;
    justify-items: center;
    text-align: center;
  }

  .hero-photo {
    width: 100%;
  }

  .hero-badges {
    max-width: min(100%, 520px);
  }

  .hero-links { justify-content: center; }
  .interest-grid,
  .awards-grid,
  .fun-facts-grid { grid-template-columns: 1fr; }
  .timeline-item { grid-template-columns: 70px 1fr; }
}

@media (max-width: 560px) {
  body { font-size: 15px; }
  .container,
  .nav-inner { padding-left: 20px; padding-right: 20px; }
  h1 { font-size: 38px; }
  .gallery-heading {
    align-items: flex-start;
    flex-direction: column;
    gap: 8px;
  }
  .hero-photo > img { height: 180px; width: 180px; }
  .hero-badges {
    gap: 6px;
    max-width: 100%;
  }
  .hero-badges img { height: 19px; }
  .news-item { grid-template-columns: 1fr; gap: 2px; }
  .gallery-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .back-to-top { bottom: 18px; right: 18px; }
}