:root {
  --accent: #2967ac;
  --accent-hover: #077af6;
  --text: #38393c;
  --heading: #111111;
  --muted: #6b6e73;
  --line: #e4e4e4;
  --soft: #f6f7f8;
  --max: 1180px;
  --side: 292px;
  --font: "Lato", "PingFang SC", "Hiragino Sans GB", "Noto Sans SC", "Microsoft YaHei", sans-serif;
}

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

html { scroll-behavior: smooth; }

body {
  background: #fff;
  color: var(--text);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.65;
}

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

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

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

img { max-width: 100%; }

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid transparent;
}

.topbar::after {
  content: "";
  display: block;
  height: 1px;
  background: linear-gradient(to right, transparent, #d8d8d8 12%, #d8d8d8 88%, transparent);
}

.topbar-inner {
  max-width: var(--max);
  margin: 0 auto;
  min-height: 62px;
  padding: 0 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.brand {
  color: var(--heading);
  font-weight: 700;
  font-size: 16px;
  white-space: nowrap;
}

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

.nav {
  display: flex;
  align-items: center;
  gap: 22px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.nav a {
  color: #222;
  opacity: 0.62;
  font-size: 15px;
  line-height: 60px;
  border-bottom: 2px solid transparent;
}

.nav a:hover,
.nav a.active {
  opacity: 1;
  color: #222;
  border-bottom-color: #3e3e3e;
}

.lang {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-left: 8px;
}

.lang button {
  border: 0;
  background: transparent;
  font-family: var(--font);
  font-size: 14px;
  color: #222;
  opacity: 0.45;
  cursor: pointer;
  padding: 4px 2px;
  border-bottom: 2px solid transparent;
}

.lang button[aria-pressed="true"] {
  opacity: 1;
  font-weight: 700;
  border-bottom-color: var(--accent);
}

.layout {
  max-width: var(--max);
  margin: 0 auto;
  padding: 36px 28px 88px;
  display: grid;
  grid-template-columns: var(--side) minmax(0, 1fr);
  gap: 56px;
  align-items: start;
}

.main { min-width: 0; }

.side {
  position: sticky;
  top: 84px;
}

.portrait {
  width: 220px;
  aspect-ratio: 810 / 1216;
  border-radius: 16px;
  overflow: hidden;
  margin-bottom: 16px;
}

.portrait img {
  width: 100%;
  height: 100%;
  max-width: none;
  object-fit: cover;
  display: block;
  transition: transform .7s cubic-bezier(.2, .7, .3, 1);
}

.portrait:hover img { transform: scale(1.03); }

.identity h1 {
  font-size: 22px;
  font-weight: 700;
  color: var(--heading);
  letter-spacing: 0;
  line-height: 1.3;
  white-space: nowrap;
}

.role {
  margin-top: 10px;
  color: #171718;
  font-size: 15px;
  line-height: 1.45;
}

.profile-links {
  display: grid;
  gap: 10px;
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  font-size: 14px;
}

.profile-links a {
  display: flex;
  align-items: center;
  gap: 8px;
  min-width: 0;
}

.profile-links svg {
  width: 18px;
  height: 18px;
  flex: 0 0 auto;
}

.profile-links .email { overflow-wrap: anywhere; }

.citation-badge {
  display: inline-flex;
  align-items: center;
  margin-left: auto;
  line-height: 17px;
  font: 10px/17px Verdana, sans-serif;
  color: #333;
  border: 1px solid #ccd1d5;
  border-radius: 3px;
  white-space: nowrap;
}

.citation-label { padding: 0 4px; background: #f1f3f5; }

.citation-badge b {
  padding: 0 4px;
  font-weight: 400;
  background: #fff;
  border-left: 1px solid #ccd1d5;
}

.main section { padding: 8px 0 34px; }

.main section + section {
  border-top: 1px solid var(--line);
  padding-top: 32px;
}

.main h2.sec {
  margin: 0 0 16px;
  font-size: 24px;
  font-weight: 700;
  color: var(--heading);
}

.prose p + p { margin-top: 14px; }

.prose p { text-align: justify; }

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 16px;
}

.tags span {
  font-size: 13px;
  color: #333;
  background: var(--soft);
  border-radius: 99px;
  padding: 4px 10px;
}

.news { list-style: none; }

.news.is-collapsed .news-more { display: none; }

.news li {
  display: grid;
  grid-template-columns: 92px 1fr;
  gap: 14px;
  padding: 9px 0;
  text-align: justify;
}

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

.paper {
  display: grid;
  grid-template-columns: 168px minmax(0, 1fr);
  gap: 12px 16px;
  align-items: center;
  padding: 16px 0 18px;
  border-bottom: 1px solid var(--line);
}

.paper-visual {
  display: block;
  width: 168px;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  border-radius: 4px;
  background: #f3f4f5;
}

.paper-visual img,
.paper-visual video {
  width: 100%;
  height: 100%;
  max-width: none;
  object-fit: contain;
  object-position: center center;
  background: #fff;
  display: block;
}

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

.paper:last-child { border-bottom: 0; }

.badges {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 6px;
}

.badge {
  font-size: 12px;
  line-height: 1;
  padding: 4px 7px;
  border-radius: 3px;
  background: #eef3f9;
  color: #234e86;
  font-weight: 700;
}

.badge.muted {
  background: var(--soft);
  color: #555;
  font-weight: 600;
}

.paper h3 {
  font-size: 17px;
  line-height: 1.45;
  color: var(--heading);
  font-weight: 700;
}

.authors {
  margin-top: 6px;
  font-size: 14.5px;
  color: #444;
}

.authors strong { color: #111; }

.venue {
  margin-top: 4px;
  font-size: 14.5px;
  color: #222;
}

.blurb {
  margin-top: 8px;
  color: #444;
  text-align: justify;
}

.paper-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  margin-top: 10px;
}

.paper-links .flat-badge {
  --badge-color: #176da5;
  display: inline-flex;
  align-items: stretch;
  border-radius: 3px;
  overflow: hidden;
  color: #fff;
  font-family: Verdana, Geneva, "DejaVu Sans", sans-serif;
  font-size: 11px;
  font-weight: 400;
  line-height: 14px;
  text-shadow: 0 1px 0 rgba(0, 0, 0, 0.25);
  white-space: nowrap;
}

.paper-links .flat-badge:hover { filter: brightness(0.9); color: #fff; }

.badge-key,
.badge-value {
  display: flex;
  align-items: center;
  padding: 2px 6px;
  min-height: 18px;
}

.badge-key { background: #555; }

.badge-value { background: var(--badge-color); }

.paper-links .flat-paper { --badge-color: #a82c31; }

.paper-links .flat-code { --badge-color: #35495c; }

.paper-links .flat-dataset { --badge-color: #287164; }

.paper-links .flat-model { --badge-color: #c47d12; }

.github-stars {
  display: inline-flex;
  align-items: center;
  line-height: 1;
}

.github-stars img {
  display: block;
  height: 18px;
  width: auto;
}

.cite {
  color: var(--muted);
  font-size: 13px;
}

.note {
  margin-top: 12px;
  font-size: 13px;
  color: var(--muted);
}

.timeline { list-style: none; }

.timeline li {
  display: grid;
  grid-template-columns: 168px 1fr;
  gap: 16px;
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
}

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

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

.timeline h3 {
  font-size: 16px;
  color: var(--heading);
  font-weight: 700;
}

.timeline p { margin-top: 4px; text-align: justify; }

.honors { list-style: none; }

.honors li {
  position: relative;
  padding: 7px 0 7px 14px;
  text-align: justify;
}

.honors li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.85em;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--accent);
}

.gallery-lead { margin-bottom: 14px; text-align: justify; }

.text-btn {
  margin: 4px 0 8px;
  border: 1px solid #d5d8dc;
  background: #fff;
  color: var(--accent);
  font-family: inherit;
  font-size: 14px;
  line-height: 1.4;
  padding: 5px 14px;
  border-radius: 4px;
  cursor: pointer;
}

.text-btn:hover { color: var(--accent-hover); border-color: var(--accent); }

#news-toggle .when-open,
#gallery-shuffle .when-open { display: none; }

#news-toggle[aria-expanded="true"] .when-collapsed { display: none; }

#news-toggle[aria-expanded="true"] .when-open { display: inline; }

.orgs { list-style: none; }

.orgs li {
  display: grid;
  grid-template-columns: 176px minmax(0, 1fr);
  align-items: center;
  column-gap: 18px;
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
}

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

.org-logo {
  width: 176px;
  height: 64px;
  object-fit: contain;
  object-position: center center;
}

.org-logo.seal,
.org-logo.mark { height: 116px; }

.orgs h3 {
  font-size: 17px;
  color: var(--heading);
  font-weight: 700;
}

.orgs p { margin-top: 4px; text-align: justify; }

.mosaic { width: 100%; line-height: 0; font-size: 0; }

.mosaic-row { display: flex; width: 100%; gap: 0; }

.mosaic img {
  display: block;
  max-width: none;
  flex: 0 0 auto;
  object-fit: cover;
  cursor: zoom-in;
}

.lightbox {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.82);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 50;
  padding: 24px;
}

.lightbox.open { display: flex; }

.lightbox img {
  max-width: min(1100px, 100%);
  max-height: 88vh;
  border-radius: 4px;
}

.lightbox button {
  position: absolute;
  top: 16px;
  right: 18px;
  border: 0;
  background: transparent;
  color: #fff;
  font-size: 32px;
  cursor: pointer;
}

footer.colophon {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 28px 40px;
  color: var(--muted);
  font-size: 13px;
}

@media (max-width: 980px) {
  .timeline li,
  .news li { grid-template-columns: 1fr; gap: 2px; }
}

@media (max-width: 860px) {
  .topbar-inner { padding: 10px 16px; align-items: flex-start; flex-direction: column; gap: 4px; }
  .nav a { line-height: 32px; }
  .layout {
    grid-template-columns: minmax(0, 1fr);
    padding: 20px 16px 64px;
    gap: 28px;
  }
  .side { position: static; }
  .portrait { width: 200px; margin: 0 auto 16px; }
  .identity h1 { font-size: 20px; white-space: normal; }
  .orgs li { grid-template-columns: 120px minmax(0, 1fr); align-items: center; }
  .org-logo { width: 120px; height: 52px; }
  .org-logo.seal,
  .org-logo.mark { height: 92px; }
  .paper { grid-template-columns: 120px minmax(0, 1fr); }
  .paper-visual { width: 120px; }
}

@media (max-width: 560px) {
  .paper { grid-template-columns: minmax(0, 1fr); }
  .paper-visual { width: min(220px, 100%); margin-inline: auto; }
}