:root {
  color-scheme: light;
  --bg: #ffffff;
  --ink: #30363d;
  --muted: #5f6872;
  --line: #e6e8eb;
  --accent: #224b8d;
  --accent-dark: #142d55;
  --accent-soft: #edf3fb;
  --forest: #1d6a57;
  --forest-soft: rgba(29, 106, 87, 0.1);
  --gold: #a45c1d;
  --gold-soft: rgba(216, 154, 43, 0.16);
  --red: #b42318;
  --card: #ffffff;
  --soft: #f8f9fa;
  --body: "Trebuchet MS", "Aptos", "Segoe UI", Helvetica, Arial, sans-serif;
  --mono: Monaco, Consolas, "Lucida Console", monospace;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--body);
  font-size: 15px;
  line-height: 1.55;
}

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

a:hover {
  color: var(--accent-dark);
  text-decoration: underline;
  text-underline-offset: 2px;
}

button {
  font: inherit;
}

.shell {
  width: min(1120px, calc(100% - 2rem));
  margin: 0 auto;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(255, 255, 255, 0.96);
  border-bottom: 1px solid var(--line);
}

.topbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.55rem 0;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  color: var(--ink);
  font-weight: 700;
}

.brand-mark {
  display: grid;
  width: 2.1rem;
  height: 2.1rem;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--accent-soft);
  color: var(--accent);
  font-family: var(--mono);
  font-size: 0.82rem;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 0.85rem;
  color: var(--muted);
  font-size: 0.95rem;
}

.nav a {
  color: var(--muted);
}

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

.site-layout {
  display: grid;
  grid-template-columns: 280px minmax(0, 1fr);
  gap: 1.45rem;
  align-items: start;
  padding: 1.55rem 0 0;
}

.content-flow {
  min-width: 0;
}

.panel,
.plain-panel {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--card);
}

.profile-panel {
  position: sticky;
  top: 4.4rem;
  display: grid;
  gap: 0.85rem;
  padding: 1.05rem;
}

.portrait-mark {
  display: grid;
  width: 100%;
  aspect-ratio: 4 / 3;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
  background: #f8f9fa;
}

.portrait-mark img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 54%;
}

.hero-name {
  margin: 0;
  text-align: center;
  font-size: 2.05rem;
  line-height: 1.05;
  letter-spacing: 0;
}

.hero-name span {
  display: block;
  margin-top: 0.16rem;
  color: var(--muted);
  font-size: 1rem;
  font-weight: 700;
}

.profile-caption {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
  text-align: center;
}

.identity-list {
  display: grid;
  gap: 0.58rem;
  margin-top: 0.1rem;
}

.identity-item {
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
  color: var(--muted);
  font-size: 0.92rem;
}

.identity-icon {
  width: 1rem;
  flex: 0 0 1rem;
  color: var(--forest);
  text-align: center;
}

.paper-head,
.pub-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.link-pill,
.meta-pill {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 1.75rem;
  padding: 0.16rem 0.56rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: #fff;
  color: var(--muted);
  font-size: 0.84rem;
  font-weight: 700;
}

.link-pill.primary {
  border-color: var(--accent);
  background: var(--accent);
  color: #fff;
}

.intro-panel {
  display: grid;
  gap: 1rem;
  padding: 1.2rem;
}

.section {
  padding: 1.35rem 0 0;
}

.section-head {
  display: block;
  margin-bottom: 0.7rem;
}

.section-title {
  margin: 0;
  color: var(--ink);
  font-size: 1.4rem;
  line-height: 1.2;
  letter-spacing: 0;
}

.section-intro,
.lede {
  margin: 0.35rem 0 0;
  color: var(--muted);
  font-size: 0.96rem;
}

.education-block {
  padding-top: 0.9rem;
  border-top: 1px solid var(--line);
}

.block-title {
  margin: 0 0 0.65rem;
  color: var(--gold);
  font-size: 0.95rem;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.education-list {
  display: grid;
  gap: 0.72rem;
}

.edu-item {
  display: grid;
  grid-template-columns: 8.8rem minmax(0, 1fr);
  gap: 0.15rem 0.7rem;
  padding-left: 0.8rem;
  border-left: 2px solid var(--line);
}

.edu-period {
  color: var(--forest);
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0.03em;
}

.edu-degree {
  color: var(--ink);
  font-weight: 700;
}

.edu-meta {
  grid-column: 2;
  color: var(--muted);
  font-size: 0.93rem;
}

.map-panel {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 230px;
  gap: 0.9rem;
  padding: 0.9rem;
}

.map-toolbar {
  position: absolute;
  top: 1rem;
  left: 1rem;
  z-index: 2;
  display: flex;
  gap: 0.25rem;
}

.icon-button {
  display: grid;
  width: 2rem;
  height: 2rem;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.94);
  color: var(--ink);
  cursor: pointer;
}

.icon-button:hover {
  border-color: rgba(34, 75, 141, 0.28);
  color: var(--accent);
}

.map-stage {
  min-height: 450px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: linear-gradient(180deg, #ffffff 0%, #f8f9fa 100%);
  cursor: grab;
}

.map-stage.is-dragging {
  cursor: grabbing;
}

.research-svg {
  display: block;
  width: 100%;
  height: 100%;
  min-height: 450px;
  touch-action: none;
  user-select: none;
}

.research-svg text {
  font-family: var(--body);
  letter-spacing: 0;
}

.map-bg {
  fill: #fbfcfe;
}

.map-section-label {
  fill: var(--gold);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.timeline-line {
  fill: none;
  stroke: #cdd6e2;
  stroke-width: 3;
  stroke-linecap: round;
}

.timeline-dot {
  fill: #ffffff;
  stroke: var(--accent);
  stroke-width: 2;
}

.timeline-dot.active {
  fill: var(--accent);
}

.timeline-label {
  fill: var(--muted);
  font-size: 11.5px;
  font-weight: 700;
}

.timeline-connector {
  fill: none;
  stroke: #cdd6e2;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-dasharray: 5 5;
}

.flow-line {
  fill: none;
  stroke: #5f6872;
  stroke-width: 2.5;
  stroke-linecap: round;
  stroke-dasharray: 12 10;
  animation: flow 3.4s linear infinite;
}

.delay-2 { animation-delay: -0.5s; }
.delay-3 { animation-delay: -1s; }
.delay-5 { animation-delay: -2s; }
.delay-6 { animation-delay: -2.5s; }

@keyframes flow {
  to {
    stroke-dashoffset: -44;
  }
}

.map-node {
  cursor: pointer;
  outline: none;
}

.map-node > rect {
  fill: #ffffff;
  stroke: var(--line);
  stroke-width: 2;
  transition: fill 180ms ease, stroke 180ms ease, filter 180ms ease;
}

.company-node.msra-node > rect {
  fill: url(#msraGrad);
}

.company-node.agibot-node > rect {
  fill: url(#agibotGrad);
}

.sub-node > rect {
  fill: #ffffff;
}

.core-node > rect {
  fill: url(#agentGlow);
  stroke: rgba(34, 75, 141, 0.24);
}

.map-node circle {
  fill: var(--forest);
}

.map-node text {
  fill: var(--ink);
  font-size: 18px;
  font-weight: 700;
  pointer-events: none;
}

.map-node .node-label {
  font-size: 18px;
  font-weight: 800;
}

.map-node .node-label.large {
  font-size: 22px;
}

.map-node .node-meta,
.map-node .node-tag {
  fill: var(--muted);
  font-size: 12.5px;
  font-weight: 700;
}

.internship-node .node-label {
  font-size: 17px;
}

.map-node .centered {
  text-anchor: middle;
}

.map-node:hover > rect,
.map-node:focus > rect,
.map-node.is-active > rect {
  fill: var(--accent-soft);
  stroke: var(--accent);
  filter: drop-shadow(0 8px 14px rgba(34, 75, 141, 0.16));
}

.map-node.is-active circle {
  fill: var(--accent);
}

.ms-logo rect {
  stroke: none;
}

.agibot-brand {
  pointer-events: none;
}

.map-chip rect {
  fill: #30363d;
  opacity: 0.92;
}

.map-chip text {
  fill: #fff;
  font-size: 13px;
  text-anchor: middle;
  pointer-events: none;
}

.chip-a,
.chip-b,
.chip-c {
  animation: chip-float 4s ease-in-out infinite;
}

.chip-b { animation-delay: -0.8s; }
.chip-c { animation-delay: -1.6s; }

@keyframes chip-float {
  50% {
    transform: translateY(-5px);
  }
}

.map-detail {
  align-self: stretch;
  min-height: 220px;
  padding: 0.9rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--soft);
}

.detail-kicker {
  display: block;
  margin-bottom: 0.35rem;
  color: var(--gold);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.map-detail h3 {
  margin: 0 0 0.45rem;
  font-size: 1.05rem;
}

.map-detail p {
  margin: 0;
  color: var(--muted);
  font-size: 0.94rem;
}

.publication-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.publication-tabs {
  display: inline-flex;
  gap: 0.25rem;
  padding: 0.18rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--soft);
}

.publication-tab {
  min-height: 1.85rem;
  padding: 0.2rem 0.74rem;
  border: 0;
  border-radius: 999px;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
}

.publication-tab.is-active {
  background: #fff;
  color: var(--ink);
  box-shadow: 0 1px 2px rgba(48, 54, 61, 0.08);
}

.publication-panel[hidden] {
  display: none;
}

.paper-list {
  display: grid;
  gap: 1.15rem;
}

.paper-card {
  display: grid;
  grid-template-columns: minmax(190px, 300px) minmax(0, 1fr);
  gap: 1rem;
  align-items: start;
  padding: 0 0 1.15rem;
  border-bottom: 1px solid var(--line);
}

.paper-thumb {
  position: relative;
  min-height: 0;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  border: 1px solid var(--line);
  background: #f8f9fa;
  color: #fff;
}

.paper-thumb img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
  background: #ffffff;
}

.thumb-badge {
  position: absolute;
  top: 0.45rem;
  left: 0.45rem;
  z-index: 1;
  padding: 0.12rem 0.36rem;
  border: 1px solid rgba(255, 255, 255, 0.35);
  background: rgba(255, 255, 255, 0.9);
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 700;
}

.paper-content {
  display: grid;
  gap: 0.3rem;
  align-content: start;
}

.meta-pill {
  color: var(--muted);
  font-size: 0.78rem;
}

.meta-pill.highlight {
  border-color: rgba(216, 154, 43, 0.18);
  background: var(--gold-soft);
  color: #8a5a09;
}

.meta-pill.workshop {
  border-color: rgba(34, 75, 141, 0.16);
  background: var(--accent-soft);
  color: var(--accent);
}

.paper-content h3 {
  margin: 0;
  color: var(--ink);
  font-size: 1.08rem;
  line-height: 1.25;
}

.paper-authors,
.paper-venue,
.paper-summary,
.pub-authors,
.pub-venue,
.pub-links {
  margin: 0;
  color: var(--muted);
  font-size: 0.93rem;
  line-height: 1.45;
}

.paper-authors a,
.pub-authors a {
  color: var(--accent);
}

.paper-summary {
  color: #4f565e;
}

.venue-abbr {
  color: var(--accent);
  font-weight: 700;
}

.home-pub-list {
  margin: 0;
  padding-left: 1.25rem;
}

.home-pub-list li + li {
  margin-top: 0.95rem;
}

.pub-title {
  color: var(--ink);
  font-weight: 700;
  line-height: 1.35;
}

.two-up {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.2rem;
}

.plain-panel {
  padding: 1rem;
}

.compact-list {
  margin: 0;
  padding-left: 1.2rem;
}

.compact-list li + li,
.service-item + .service-item {
  margin-top: 0.52rem;
}

.service-item {
  color: var(--ink);
  font-size: 0.96rem;
}

.service-item strong {
  margin-right: 0.35rem;
}

.footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.8rem;
  margin-top: 1.6rem;
  padding: 0.9rem 0 2.6rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.9rem;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .flow-line,
  .chip-a,
  .chip-b,
  .chip-c {
    animation: none;
  }
}

@media (max-width: 940px) {
  .site-layout {
    grid-template-columns: 1fr;
  }

  .profile-panel {
    position: static;
    max-width: 320px;
    margin: 0 auto;
  }

  .map-panel {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 720px) {
  .topbar-inner,
  .publication-head {
    align-items: flex-start;
    flex-direction: column;
  }

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

  .edu-item {
    grid-template-columns: 1fr;
  }

  .edu-meta {
    grid-column: auto;
  }

  .paper-card,
  .two-up {
    grid-template-columns: 1fr;
  }

  .paper-thumb {
    max-width: 360px;
  }

  .publication-tabs {
    width: 100%;
  }

  .publication-tab {
    flex: 1;
  }
}