:root {
  --bg: #f5f8fb;
  --panel: #ffffff;
  --panel-soft: #f9fafb;
  --line: #dde5ee;
  --line-strong: #3f586b;
  --text: #202833;
  --muted: #5f6975;
  --aigc: #7d6254;
  --embodied: #2f6f6a;
  --shadow: 0 12px 28px rgba(24, 32, 41, 0.06);
  --radius-lg: 18px;
  --radius-md: 10px;
  --rm-dot-size: 24px;
  --rm-dot-border: 3px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--text);
  background: var(--bg);
  font-family: "Noto Sans SC", sans-serif;
}

a {
  color: inherit;
  text-decoration: none;
}

button {
  font: inherit;
}

.page-shell {
  width: min(1040px, calc(100vw - 40px));
  margin: 0 auto;
  padding-bottom: 56px;
}

.topbar {
  position: static;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  margin: 28px 0 44px;
  padding: 0;
  background: transparent;
  border: 0;
  border-radius: 0;
  backdrop-filter: none;
}

.brand {
  font-family: inherit;
  font-size: 1rem;
  font-weight: 700;
}

.topnav {
  display: flex;
  flex-wrap: wrap;
  gap: 22px;
  color: var(--muted);
  font-size: 0.92rem;
  font-weight: 600;
}

.topnav a:hover,
.project-card a:hover,
.notes-entry a:hover,
.link-list a:hover {
  color: var(--text);
}

.intro {
  max-width: 720px;
  margin: 0 auto 26px;
  padding: 22px 0 46px;
  text-align: center;
}

.intro-left {
  max-width: none;
  margin: 0 0 20px;
  text-align: left;
}

.intro-portrait {
  position: relative;
  width: 120px;
  height: 120px;
  margin: 0 auto 20px;
  overflow: hidden;
  border-radius: 50%;
  background: var(--panel);
}

.intro-portrait img {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 180%;
  max-width: none;
  height: auto;
  transform: translate(-54.5%, -53%);
}

.intro h1 {
  margin: 0;
  font-family: inherit;
  font-size: clamp(2rem, 4vw, 2.7rem);
  line-height: 1.1;
  letter-spacing: 0;
}

.intro-subtitle {
  max-width: 720px;
  margin: 14px 0 0;
  color: var(--muted);
  line-height: 1.75;
}

.intro-status {
  margin: 16px 0 0;
}

.status-tag {
  display: inline-block;
  max-width: 100%;
  padding: 4px 10px;
  border: 1px solid #cfe1dc;
  border-radius: 4px;
  background: #edf5f1;
  color: var(--embodied);
  font-size: 0.82rem;
  font-weight: 600;
  line-height: 1.5;
}

.intro-links {
  display: flex;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
  margin: 14px 0 0;
  color: var(--muted);
  font-size: 0.94rem;
}

.intro-links > * + *::before {
  content: "/";
  margin-right: 12px;
  color: #a0a9b4;
}

.intro-links a {
  color: var(--embodied);
}

.content-row {
  display: grid;
  grid-template-columns: 120px minmax(0, 1fr);
  gap: 52px;
  padding: 28px 0;
  border-top: 1px solid var(--line);
}

.content-row h2 {
  margin: 0;
  font-size: 1.08rem;
  line-height: 1.4;
}

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

.content-body p {
  margin: 0 0 14px;
  color: var(--text);
  line-height: 1.78;
}

.content-body p:last-child {
  margin-bottom: 0;
}

.lead {
  font-weight: 600;
}

.content-body a {
  color: var(--embodied);
  font-weight: 600;
}

.news-list {
  display: grid;
  gap: 14px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.news-list li {
  display: grid;
  grid-template-columns: 92px minmax(0, 1fr);
  gap: 18px;
  line-height: 1.65;
}

.news-list time {
  color: var(--muted);
  font-weight: 700;
}

.paper-item,
.project-line {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 20px;
  align-items: start;
  padding: 16px 0;
  border-top: 1px solid rgba(221, 229, 238, 0.8);
}

.paper-item:first-child,
.project-line:first-child {
  padding-top: 0;
  border-top: 0;
}

.paper-item h3,
.project-line h3 {
  margin: 0 0 6px;
  font-family: inherit;
  font-size: 1rem;
}

.paper-item p,
.project-line p {
  margin: 0;
  color: var(--muted);
}

.publication-note {
  margin: 12px 0 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.inline-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 8px;
}

.inline-links span,
.inline-links a,
.project-line a {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  padding: 0 10px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 700;
}

.inline-links a {
  color: var(--embodied);
}

.project-line a {
  color: var(--embodied);
}

.project-line .project-repo {
  justify-self: start;
  gap: 9px;
  min-height: 32px;
  border-radius: 6px;
  white-space: nowrap;
}

.project-repo:hover {
  background: var(--panel);
  border-color: #b7ccc7;
}

.project-repo:focus-visible {
  outline: 2px solid var(--embodied);
  outline-offset: 3px;
}

.repo-stars {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding-left: 9px;
  border-left: 1px solid var(--line);
  color: var(--muted);
}

.repo-stars img {
  display: block;
  flex: 0 0 14px;
  opacity: 0.65;
}

[data-star-count] {
  display: inline-block;
  min-width: 6ch;
  text-align: right;
  font-variant-numeric: tabular-nums;
}

.muted-item {
  color: var(--muted);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(260px, 0.65fr);
  gap: 40px;
  align-items: end;
  padding: 8px 0 34px;
  border-bottom: 1px solid var(--line);
}

.hero-main {
  min-width: 0;
}

.hero-kicker,
.card-meta,
.profile-summary dt,
.hero-note span {
  display: block;
  color: var(--muted);
  font-size: 0.86rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.hero h1,
.section-head h2,
.project-card h3,
.publication-card h3,
.profile-card h3,
.notes-section-card h3 {
  margin: 0;
  font-family: "Noto Serif SC", serif;
  font-weight: 700;
  letter-spacing: 0;
}

.home-hero h1 {
  margin-top: 10px;
  font-size: clamp(2rem, 4vw, 2.7rem);
  line-height: 1.1;
}

.research-hero h1,
.hero-notes h1 {
  margin-top: 8px;
  font-size: clamp(2rem, 4vw, 2.8rem);
  line-height: 1.12;
}

.hero-summary,
.section-head p,
.project-card p,
.publication-card p,
.notes-entry span,
.edu-item p,
.notes-section-card p,
.hero-note p {
  color: var(--muted);
  line-height: 1.78;
}

.hero-summary {
  max-width: 760px;
  margin: 22px 0 0;
  font-size: 1.08rem;
}

.hero-actions {
  display: flex;
  gap: 12px;
  margin-top: 24px;
  flex-wrap: wrap;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 0 16px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--panel);
  color: var(--text);
  font-weight: 600;
}

.button-primary {
  background: var(--text);
  border-color: var(--text);
  color: #fff;
}

.profile-summary,
.hero-note {
  border-left: 1px solid var(--line);
  padding-left: 24px;
}

.profile-summary dl {
  display: grid;
  gap: 16px;
  margin: 0;
}

.profile-summary dt,
.profile-summary dd {
  margin: 0;
}

.profile-summary dd {
  margin-top: 4px;
  font-weight: 700;
}

.profile-summary a,
.project-card a,
.notes-entry a,
.link-list a {
  color: var(--embodied);
}

.hero-note strong {
  display: block;
  margin-top: 6px;
  font-size: 1.1rem;
}

.section {
  margin-top: 34px;
}

.section-head {
  margin-bottom: 16px;
}

.section-head h2 {
  font-size: 1.55rem;
}

.card-grid,
.project-list,
.profile-grid,
.notes-content {
  display: grid;
  gap: 14px;
}

.publication-grid,
.project-grid,
.profile-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

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

.publication-card,
.project-card,
.notes-entry,
.profile-card,
.notes-sidebar,
.notes-section-card,
.rm {
  background: var(--panel);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.publication-card,
.project-card,
.profile-card,
.notes-section-card {
  padding: 20px;
  border-radius: var(--radius-lg);
}

.publication-card,
.project-card {
  display: flex;
  flex-direction: column;
  min-height: 210px;
}

.publication-card h3,
.project-card h3 {
  margin-top: 8px;
  font-size: 1.18rem;
}

.publication-card p,
.project-card p {
  margin: 10px 0 0;
}

.card-links,
.project-card a {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: auto;
  padding-top: 18px;
}

.disabled-link,
.project-card a {
  width: fit-content;
  padding: 6px 11px;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 0.82rem;
  font-weight: 700;
}

.disabled-link {
  color: var(--muted);
  background: var(--panel-soft);
}

.notes-entry {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 18px 20px;
  border-radius: var(--radius-lg);
}

.notes-entry span {
  font-size: 0.92rem;
}

.edu-item {
  margin-top: 12px;
}

.edu-item span {
  display: block;
  margin-top: 4px;
  color: var(--muted);
}

.link-list {
  margin: 12px 0 0;
  padding: 0;
  list-style: none;
}

.link-list li {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 8px 0;
  border-bottom: 1px solid var(--line);
}

.link-list li:last-child {
  border-bottom: none;
}

/* Research roadmap */
.rm {
  border-radius: 24px;
  padding: 34px 28px 28px;
}

.rm-title {
  margin: 0 0 20px;
  text-align: center;
  font-family: "Noto Serif SC", serif;
  font-size: clamp(1.4rem, 2.4vw, 2.2rem);
  font-weight: 700;
  letter-spacing: 0.04em;
  line-height: 1.15;
  color: var(--text);
}

.rm-title span {
  display: inline;
}

.rm-canvas {
  position: relative;
  width: 100%;
  aspect-ratio: 10 / 7.6;
}

.rm-svg {
  position: absolute;
  inset: 0;
  z-index: 0;
  width: 100%;
  height: 100%;
}

.rm-line {
  fill: none;
  stroke: var(--line-strong);
  stroke-width: 2.6;
  stroke-linecap: round;
  stroke-dasharray: 1600;
  stroke-dashoffset: 1600;
  animation: rm-draw 1.6s ease forwards;
}

.rm-canvas.is-replaying .rm-line {
  animation: none;
}

.rm-node-dot,
.rm-leaf-dot {
  width: var(--rm-dot-size);
  height: var(--rm-dot-size);
  border: var(--rm-dot-border) solid var(--line-strong);
  border-radius: 50%;
  background: var(--panel);
  box-sizing: border-box;
  z-index: 3;
}

.rm-node-dot {
  position: absolute;
  transform: translate(-50%, -50%);
  pointer-events: none;
}

.rm-node--root-start {
  top: 11.58%;
  left: 50%;
}

.rm-node--root-embodied {
  top: 49.21%;
  left: 50%;
}

.rm-node--aigc-start {
  top: 32.24%;
  left: 30%;
}

.rm-node--embodied-start {
  top: 61.84%;
  left: 70%;
}

.rm-time {
  position: absolute;
  z-index: 2;
  font-size: clamp(1rem, 1.8vw, 1.38rem);
  font-weight: 700;
  color: #263444;
  pointer-events: none;
}

.rm-time--root-start {
  top: 9.4%;
  left: 54%;
}

.rm-time--root-embodied {
  top: 47.4%;
  left: 54%;
}

.rm-branch {
  position: absolute;
  z-index: 2;
  font-size: clamp(0.76rem, 1.1vw, 0.92rem);
  font-weight: 700;
  letter-spacing: 0.08em;
  line-height: 1.5;
  color: var(--line-strong);
  text-transform: uppercase;
  pointer-events: none;
}

.rm-branch--aigc {
  top: 25%;
  left: 6%;
}

.rm-branch--embodied {
  top: 55%;
  right: 6%;
}

.rm-col {
  position: absolute;
  display: flex;
  flex-direction: column;
  gap: 46px;
  width: 29%;
  min-width: 220px;
}

.rm-col--left {
  left: 0;
  top: 32.24%;
  padding-top: 64px;
  align-items: stretch;
}

.rm-col--right {
  right: 0;
  top: 61.84%;
  padding-top: 64px;
  align-items: stretch;
}

.rm-col::before {
  content: "";
  position: absolute;
  top: 9px;
  height: var(--rm-line-end, calc(100% - 18px));
  width: 2.6px;
  background: var(--line-strong);
  border-radius: 2px;
  z-index: 0;
}

.rm-col--left::before {
  right: 0;
  margin-right: -1.3px;
}

.rm-col--right::before {
  left: 0;
  margin-left: -1.3px;
}

.rm-leaf {
  position: relative;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  column-gap: 0;
  row-gap: 0;
  width: 100%;
}

.rm-col--left .rm-leaf {
  grid-template-areas:
    "tag line dot"
    "panel panel panel";
}

.rm-col--right .rm-leaf {
  grid-template-areas:
    "dot line tag"
    "panel panel panel";
}

.rm-tag {
  grid-area: tag;
  z-index: 2;
  padding: 8px 16px;
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--text);
  background: var(--panel-soft);
  border: 1.2px solid #cfd5dc;
  border-radius: 999px;
  cursor: pointer;
  white-space: nowrap;
  box-shadow: 0 3px 10px rgba(30, 42, 52, 0.04);
  transition: background 0.3s ease, border-color 0.3s ease, color 0.3s ease,
    border-radius 0.3s ease, box-shadow 0.3s ease;
}

.rm-tag:hover {
  background: var(--panel);
  border-color: var(--line-strong);
  box-shadow: 0 6px 16px rgba(30, 42, 52, 0.08);
}

.rm-leaf-line {
  grid-area: line;
  z-index: 1;
  height: 2.6px;
  background: var(--line-strong);
  border-radius: 2px;
  min-width: 6px;
}

.rm-leaf-dot {
  grid-area: dot;
  position: relative;
}

.rm-col--left .rm-leaf-dot {
  margin-right: calc(var(--rm-dot-size) / -2);
}

.rm-col--right .rm-leaf-dot {
  margin-left: calc(var(--rm-dot-size) / -2);
}

.rm-panel {
  grid-area: panel;
  justify-self: start;
  z-index: 4;
  width: 100%;
  max-width: 310px;
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  margin-top: -1px;
  padding: 0 18px;
  background: var(--panel);
  border: 1.3px solid #bfccd4;
  border-top: none;
  border-radius: 0 14px 14px 14px;
  box-shadow: 0 14px 36px rgba(30, 42, 52, 0.1);
  transition: max-height 0.5s cubic-bezier(0.4, 0, 0.2, 1),
    opacity 0.35s ease,
    padding 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.rm-col--right .rm-panel {
  justify-self: end;
  border-radius: 14px 0 14px 14px;
}

.rm-leaf.is-open .rm-panel {
  max-height: 340px;
  opacity: 1;
  padding: 14px 18px 16px;
}

.rm-leaf.is-open .rm-tag {
  background: var(--panel);
  border-color: #bfccd4;
  color: var(--text);
  box-shadow: 0 -3px 10px rgba(30, 42, 52, 0.04);
}

.rm-col--left .rm-leaf.is-open .rm-tag {
  border-radius: 14px 14px 14px 0;
}

.rm-col--right .rm-leaf.is-open .rm-tag {
  border-radius: 14px 14px 0 14px;
}

.rm-panel__tag {
  display: inline-block;
  padding: 2px 10px;
  margin-bottom: 8px;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--line-strong);
  background: #edf2f5;
  border-radius: 99px;
  letter-spacing: 0.02em;
}

.rm-panel h4 {
  margin: 0;
  font-size: 0.95rem;
  font-weight: 700;
  line-height: 1.45;
}

.rm-panel p {
  margin: 8px 0 0;
  font-size: 0.84rem;
  line-height: 1.7;
  color: var(--muted);
}

.rm-panel__projects {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
}

.rm-panel__projects a {
  display: inline-block;
  padding: 4px 12px;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--embodied);
  border: 1px solid var(--embodied);
  border-radius: 99px;
  transition: background 0.2s ease, color 0.2s ease;
}

.rm-panel__projects a:hover {
  background: var(--embodied);
  color: #fff;
}

.rm-footnote {
  margin: 18px 0 0;
  font-size: 0.82rem;
  color: var(--muted);
  font-style: italic;
}

@keyframes rm-draw {
  to {
    stroke-dashoffset: 0;
  }
}

/* Notes page */
.notes-main {
  display: grid;
  gap: 28px;
}

.hero-notes {
  grid-template-columns: 1fr;
}

.notes-layout {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 16px;
}

.notes-sidebar {
  position: sticky;
  top: 92px;
  align-self: start;
  display: grid;
  gap: 8px;
  padding: 18px;
  border-radius: var(--radius-lg);
}

.notes-sidebar h2 {
  margin: 0;
  font-family: "Noto Serif SC", serif;
}

.notes-link {
  padding: 10px 12px;
  border-radius: 10px;
  color: var(--muted);
}

.notes-link:hover,
.notes-link.active {
  color: var(--text);
  background: var(--panel-soft);
}

@media (max-width: 980px) {
  .hero,
  .content-row,
  .profile-grid,
  .notes-layout,
  .publication-grid,
  .project-grid {
    grid-template-columns: 1fr;
  }

  .content-row {
    gap: 12px;
  }

  .profile-summary,
  .hero-note {
    border-left: 0;
    border-top: 1px solid var(--line);
    padding-left: 0;
    padding-top: 22px;
  }

  .rm-canvas {
    aspect-ratio: auto;
  }

  .rm-svg,
  .rm-time,
  .rm-branch,
  .rm-node-dot {
    display: none;
  }

  .rm-col {
    position: static !important;
    width: 100% !important;
    padding-top: 0;
    gap: 14px;
  }

  .rm-col::before {
    display: none;
  }

  .rm-leaf-line,
  .rm-leaf-dot {
    display: none;
  }

  .rm-leaf {
    grid-template-columns: 1fr !important;
    grid-template-areas: "tag" "panel" !important;
  }

  .rm-panel {
    max-width: none;
    justify-self: stretch !important;
  }

  .notes-sidebar {
    position: static;
  }
}

@media (max-width: 680px) {
  .page-shell {
    width: min(100vw - 20px, 100%);
  }

  .topbar,
  .notes-entry {
    flex-direction: column;
    align-items: flex-start;
  }

  .topnav {
    gap: 10px;
    font-size: 0.9rem;
  }

  .intro {
    padding: 10px 0 34px;
    text-align: left;
  }

  .intro-portrait {
    width: 104px;
    height: 104px;
    margin-left: 0;
  }

  .intro-links {
    justify-content: flex-start;
  }

  .intro-links > * + *::before {
    content: "";
    margin-right: 0;
  }

  .content-row {
    padding: 24px 0;
  }

  .news-list li,
  .paper-item,
  .project-line {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .inline-links {
    justify-content: flex-start;
  }

  .hero {
    padding-top: 12px;
  }

  .rm-title {
    font-size: clamp(1.05rem, 5.8vw, 1.55rem);
    letter-spacing: 0.02em;
  }

  .rm-title span {
    display: block;
  }

  .publication-card,
  .project-card,
  .profile-card,
  .notes-section-card,
  .rm {
    padding: 18px;
  }
}