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

:root {
  --bg: oklch(98.5% 0 0);
  --text-primary: oklch(17% 0 0);
  --text-secondary: oklch(42% 0 0);
  --text-muted: oklch(52% 0 0);
  --accent: #06c;
  --accent-bg: #e8f1ff;
  --accent-border: #b3d4f5;
  --star-icon: #e3b341;
  --star-text: #ad7c10;
  --star-border: color-mix(in srgb, var(--star-icon) 45%, transparent);
  --star-hover-bg: color-mix(in srgb, var(--star-icon) 12%, transparent);
  --border: oklch(88% 0 0);
  --media-placeholder: oklch(97% 0 0);
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.25rem;
  --text-name: clamp(1.5rem, 4vw, 2rem);
  --sans: 'Lato', 'Helvetica Neue', Arial, sans-serif;
  --max-width: 760px;
  --radius: 5px;
}

html {
  min-height: 100%;
  scroll-behavior: smooth;
}

body {
  position: relative;
  min-height: 100vh;
  font-family: var(--sans);
  font-size: var(--text-base);
  line-height: 1.7;
  color: var(--text-primary);
  background: var(--bg);
  isolation: isolate;
  -webkit-font-smoothing: antialiased;
}

.flow-bg {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
  background: var(--bg);
}

.flow-bg::before,
.flow-bg::after {
  content: "";
  position: absolute;
  width: 120%;
  height: 150%;
  filter: blur(100px);
  opacity: 0.13;
  will-change: transform;
}

.flow-bg::before {
  top: -30%;
  left: -10%;
  background: radial-gradient(circle at 30% 30%, #f0d8b0 0%, #f6e8cf 40%, transparent 15%);
  animation: blobMove1 22s ease-in-out infinite;
}

.flow-bg::after {
  top: -40%;
  left: 20%;
  background: radial-gradient(circle at 70% 70%, #d8b6aa 0%, #c9a5ad 35%, transparent 15%);
  animation: blobMove2 28s ease-in-out infinite;
}

@keyframes blobMove1 {
  0% { transform: translateY(-10%) scale(1) rotate(0deg); }
  50% { transform: translateY(15%) scale(1.25) rotate(60deg); }
  100% { transform: translateY(-10%) scale(1) rotate(360deg); }
}

@keyframes blobMove2 {
  0% { transform: translate(-5%, 5%) scale(1.1) rotate(0deg); }
  50% { transform: translate(8%, -8%) scale(1.3) rotate(-45deg); }
  100% { transform: translate(-5%, 5%) scale(1.1) rotate(-360deg); }
}

@media (prefers-reduced-motion: reduce) {
  .flow-bg::before,
  .flow-bg::after { animation: none; }
}

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

.paper-sidebar {
  position: fixed;
  z-index: 2;
  top: clamp(40px, 8vw, 72px);
  left: max(20px, calc((100vw - var(--max-width)) / 2 - 300px));
  width: 260px;
  max-height: calc(100vh - clamp(80px, 16vw, 144px));
  overflow-y: auto;
  padding-right: 0.75rem;
  color: var(--text-secondary);
  opacity: 0;
  pointer-events: none;
  transform: translateX(-8px);
  transition: opacity 0.2s ease-out, transform 0.2s ease-out;
  scrollbar-color: var(--accent-border) transparent;
  scrollbar-width: thin;
}

.paper-sidebar.is-visible {
  opacity: 1;
  pointer-events: auto;
  transform: translateX(0);
}

.paper-sidebar::-webkit-scrollbar { width: 6px; }
.paper-sidebar::-webkit-scrollbar-track { background: transparent; }
.paper-sidebar::-webkit-scrollbar-thumb {
  background: var(--accent-border);
  border-radius: 9999px;
}

.paper-sidebar__title {
  font-size: var(--text-sm);
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--text-primary);
  margin-bottom: 0.75rem;
}

.paper-sidebar__nav {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.paper-sidebar__link {
  display: block;
  padding-left: 0.75rem;
  border-left: 1px solid var(--border);
  color: var(--text-secondary);
  transition: color 0.15s ease-out, border-color 0.15s ease-out;
}

.paper-sidebar__link:hover {
  color: var(--accent);
  border-color: var(--accent-border);
  text-decoration: none;
}

.paper-sidebar__venue {
  display: block;
  font-size: var(--text-xs);
  color: var(--text-muted);
  line-height: 1.35;
  margin-bottom: 0.15rem;
}

.paper-sidebar__paper {
  display: -webkit-box;
  line-clamp: 2;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  font-size: var(--text-xs);
  line-height: 1.35;
}

.container {
  position: relative;
  z-index: 1;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: clamp(40px, 8vw, 72px) clamp(20px, 5vw, 32px) 0;
}

.about {
  display: flex;
  gap: clamp(28px, 6vw, 52px);
  align-items: flex-start;
  margin-bottom: clamp(16px, 3vw, 28px);
}

.about__side {
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.9rem;
  margin-top: 5.0rem;
}

.about__photo {
  flex-shrink: 0;
  width: clamp(148px, 25vw, 196px);
  height: clamp(148px, 25vw, 196px);
  border-radius: 50%;
  object-fit: cover;
  object-position: top center;
}

.about__content { flex: 1; }

.about__name {
  font-size: var(--text-name);
  font-weight: 400;
  line-height: 1.15;
  margin-bottom: 0.6em;
  display: flex;
  align-items: baseline;
  gap: 0.5em;
}

.about__cn {
  font-family: 'LXGW WenKai TC', serif;
  font-weight: 400;
  font-size: 1em;
  letter-spacing: 0.05em;
}

.about__bio {
  max-width: 58ch;
  margin-bottom: 0.6em;
}

.contact {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 18px;
  align-items: center;
  justify-content: center;
}

.contact__link {
  display: inline-flex;
  align-items: center;
  color: var(--text-secondary);
  transition: color 0.15s ease-out;
}

.contact__link:hover { color: var(--accent); text-decoration: none; }
.contact__link svg { width: 26px; height: 26px; flex-shrink: 0; }

section { margin-bottom: clamp(44px, 8vw, 68px); }

.section-title {
  font-size: var(--text-lg);
  font-weight: 400;
  letter-spacing: 0.02em;
  margin-bottom: 1.25rem;
  padding-bottom: 0.6rem;
  border-bottom: 1px solid var(--border);
}

.pub-list, .project-list { display: flex; flex-direction: column; gap: 2rem; }

.pub-note {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  margin: -0.6rem 0 1.4rem;
}

.pub, .project {
  display: flex;
  gap: 1.25rem;
  align-items: flex-start;
}

.pub { scroll-margin-top: 2rem; }

.pub__media {
  position: relative;
  flex-shrink: 0;
  width: 240px;
  aspect-ratio: 16 / 9;
  border-radius: var(--radius);
  overflow: hidden;
  background: #fff;
  transition: box-shadow 0.2s ease-out, transform 0.2s ease-out;
  z-index: 0;
}

.pub__media:hover {
  box-shadow: 0 16px 36px color-mix(in srgb, #000 18%, transparent);
  transform: scale(1.16);
  z-index: 3;
}

.pub__thumb, .project__thumb {
  flex-shrink: 0;
  width: 240px;
  aspect-ratio: 16 / 9;
  border-radius: var(--radius);
  object-fit: cover;
  background: var(--media-placeholder);
}

.pub__media .pub__thumb {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border-radius: inherit;
  object-fit: contain;
  background: #fff;
}

.pub__thumb--video {
  opacity: 0;
  transition: opacity 0.18s ease-out;
}

.pub__media:hover .pub__thumb--video { opacity: 1; }

.pub__body, .project__body { flex: 1; }

.badge {
  display: block;
  width: fit-content;
  font-size: var(--text-sm);
  color: var(--text-muted);
  margin-bottom: 0.25rem;
}

.badge__accent {
  color: #9d565d;
  font-weight: 400;
  letter-spacing: 0.01em;
}

.pub__title, .project__title {
  font-size: var(--text-base);
  font-weight: 400;
  line-height: 1.45;
  margin-bottom: 0.3rem;
}

.pub__authors, .project__desc {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  margin-bottom: 0.6rem;
}

.pub__authors strong { font-weight: 700; color: var(--text-primary); }

.pill-links {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  align-items: center;
}

.pill {
  font-size: var(--text-xs);
  color: var(--accent);
  padding: 2px 9px;
  border: 1px solid var(--accent-border);
  border-radius: 9999px;
  transition: background-color 0.15s ease-out;
}

.pill:hover { background: var(--accent-bg); text-decoration: none; }

.badge-link { display: inline-flex; align-items: center; color: var(--accent); text-decoration: none; }

.gh-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  border-radius: 9999px;
  border: 1px solid var(--star-border);
  padding: 2px 8px;
  color: var(--text-secondary);
  font-size: var(--text-xs);
  line-height: 1.7;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
  transition: background-color 0.15s ease-out;
}

.gh-badge__icon {
  width: 1.1em;
  height: 1.1em;
  flex-shrink: 0;
  color: var(--star-icon);
  fill: currentColor;
  opacity: 0.82;
}

.gh-badge__count { color: var(--star-text); }
.badge-link:hover { text-decoration: none; }
.badge-link:hover .gh-badge { background: var(--star-hover-bg); }

.exp-grid {
  display: flex;
  gap: 1rem;
  overflow-x: auto;
  padding-bottom: 0.85rem;
  scroll-snap-type: x proximity;
  scrollbar-color: var(--accent-border) transparent;
  scrollbar-width: thin;
}

.exp-grid::-webkit-scrollbar { height: 8px; }
.exp-grid::-webkit-scrollbar-track { background: transparent; }
.exp-grid::-webkit-scrollbar-thumb {
  background: var(--accent-border);
  border-radius: 9999px;
}

.exp-card {
  display: flex;
  gap: 0.875rem;
  flex: 0 0 min(280px, 74vw);
  padding: 1rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  scroll-snap-align: start;
}

.exp-card__icon {
  width: 44px;
  height: 44px;
  border-radius: 8px;
  object-fit: contain;
  flex-shrink: 0;
  background: #fff;
}

.exp-card__org {
  font-size: var(--text-base);
  font-weight: 700;
  line-height: 1.35;
  margin-bottom: 0.2rem;
}

.exp-card__role { font-size: var(--text-base); }
.exp-card__mentor, .exp-card__period { font-size: var(--text-sm); color: var(--text-secondary); }

.award {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
  padding: 0.5rem 0;
}

.award__name { font-size: var(--text-base); font-weight: 400; }
.award__year { font-size: var(--text-sm); color: var(--text-secondary); white-space: nowrap; }

.site-footer {
  margin-top: 6rem;
  padding: 0.75rem 0 1rem;
  border-top: 1px solid var(--border);
  font-size: var(--text-sm);
  color: var(--text-muted);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}

.theme-toggle {
  margin-left: 0;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  flex-shrink: 0;
  transition: background-color 0.15s ease-out, color 0.15s ease-out, border-color 0.15s ease-out;
}

.theme-toggle:hover {
  background: var(--accent-bg);
  color: var(--accent);
  border-color: var(--accent-border);
}

.theme-toggle svg { width: 18px; height: 18px; }

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

[data-theme="dark"] {
  --bg: #1e1e1e;
  --text-primary: oklch(96% 0 0);
  --text-secondary: oklch(80% 0 0);
  --text-muted: oklch(68% 0 0);
  --accent: #2997ff;
  --accent-bg: #123a66;
  --accent-border: #1a4a8a;
  --star-icon: #f2cc60;
  --star-text: #f2cc60;
  --star-border: color-mix(in srgb, var(--star-icon) 50%, transparent);
  --star-hover-bg: color-mix(in srgb, var(--star-icon) 16%, transparent);
  --border: oklch(36% 0 0);
  --media-placeholder: oklch(24% 0 0);
}

[data-theme="dark"] .flow-bg::before {
  background: radial-gradient(circle at 30% 30%, #5e647d 0%, #3f4a68 40%, transparent 15%);
  opacity: 0.14;
}

[data-theme="dark"] .flow-bg::after {
  background: radial-gradient(circle at 70% 70%, #6b5148 0%, #5d4650 35%, transparent 15%);
  opacity: 0.12;
}

[data-theme="dark"] .pub__media:hover { box-shadow: 0 16px 36px color-mix(in srgb, #000 42%, transparent); }

[data-theme="dark"] .pub__thumb,
[data-theme="dark"] .project__thumb,
[data-theme="dark"] .about__photo { filter: brightness(0.82); }

[data-theme="dark"] .badge__accent { color: oklch(82% 0.035 12); }

@media (max-width: 1180px) {
  .paper-sidebar { display: none; }
}

@media (max-width: 560px) {
  .about {
    flex-direction: column;
    align-items: center;
    gap: 1em;
  }

  .about__side { width: 100%; }
  .about__content { width: 100%; }
  .about__name { justify-content: center; }
  .about__bio { max-width: none; }
  .contact { justify-content: center; }
  .pub, .project { flex-direction: column; }
  .pub__media, .pub__thumb, .project__thumb { width: 100%; height: auto; }
  .pub__media:hover { transform: none; }
  .exp-card { flex-basis: 76vw; }
  .site-footer { flex-direction: column; align-items: flex-start; }
}