:root {
  --ink: #172027;
  --ink-soft: #33424c;
  --muted: #65727b;
  --line: #d9e0e4;
  --line-strong: #bec9cf;
  --surface: #ffffff;
  --surface-soft: #f3f6f7;
  --surface-blue: #edf3f6;
  --accent: #9e3f2d;
  --accent-dark: #733022;
  --teal: #236763;
  --blue: #315f82;
  --gold: #9a722f;
  --max-width: 1180px;
  --header-height: 70px;
}

* {
  box-sizing: border-box;
  letter-spacing: 0;
}

html {
  min-width: 320px;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--surface);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.7;
  text-rendering: optimizeLegibility;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

button {
  color: inherit;
  font: inherit;
}

a {
  color: var(--blue);
  text-decoration: none;
  text-underline-offset: 0.2em;
}

a:hover {
  text-decoration: underline;
}

img {
  display: block;
  max-width: 100%;
}

[hidden] {
  display: none !important;
}

.skip-link {
  position: fixed;
  left: 1rem;
  top: -4rem;
  z-index: 100;
  background: var(--ink);
  color: #fff;
  padding: 0.55rem 0.8rem;
}

.skip-link:focus {
  top: 0.5rem;
}

.masthead {
  position: sticky;
  top: 0;
  z-index: 20;
  border-top: 3px solid var(--accent);
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.97);
  backdrop-filter: blur(14px);
}

.masthead-inner {
  display: grid;
  grid-template-columns: minmax(190px, 1fr) auto minmax(190px, 1fr);
  align-items: center;
  gap: 2rem;
  width: min(var(--max-width), calc(100% - 3rem));
  min-height: calc(var(--header-height) - 3px);
  margin: 0 auto;
}

.site-brand {
  display: inline-flex;
  align-items: center;
  justify-self: start;
  gap: 0.72rem;
  color: var(--ink);
}

.site-brand:hover {
  text-decoration: none;
}

.brand-mark {
  display: block;
  flex: 0 0 auto;
  width: 2.25rem;
  height: 2.25rem;
  transition: transform 160ms ease, filter 160ms ease;
}

.site-brand:hover .brand-mark {
  transform: translateY(-1px);
  filter: drop-shadow(0 3px 5px rgba(23, 32, 39, 0.13));
}

.brand-name {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}

.brand-name strong {
  font-family: "Songti SC", STSong, Georgia, serif;
  font-size: 1.03rem;
}

.brand-name small {
  margin-top: 0.2rem;
  color: var(--muted);
  font-family: Georgia, "Times New Roman", serif;
  font-size: 0.74rem;
}

.site-nav {
  display: flex;
  align-items: stretch;
  align-self: stretch;
  justify-content: center;
  gap: 1.7rem;
}

.site-nav a {
  position: relative;
  display: flex;
  align-items: center;
  color: var(--ink-soft);
  font-size: 0.91rem;
  white-space: nowrap;
}

.site-nav a::after {
  position: absolute;
  right: 0;
  bottom: -1px;
  left: 0;
  height: 2px;
  background: transparent;
  content: "";
}

.site-nav a:hover,
.site-nav a.active {
  color: var(--accent-dark);
  text-decoration: none;
}

.site-nav a.active::after {
  background: var(--accent);
}

.language-toggle {
  justify-self: end;
  width: 2.75rem;
  height: 2rem;
  border: 1px solid var(--line-strong);
  border-radius: 3px;
  background: var(--surface);
  color: var(--ink-soft);
  cursor: pointer;
  font-size: 0.8rem;
  font-weight: 700;
}

.language-toggle:hover {
  border-color: var(--ink-soft);
  background: var(--surface-soft);
}

.site-main {
  width: min(var(--max-width), calc(100% - 3rem));
  min-height: calc(100vh - 154px);
  margin: 0 auto;
  padding: 3.75rem 0 5rem;
}

.page-section {
  scroll-margin-top: calc(var(--header-height) + 1rem);
  padding: 4.5rem 0;
  border-top: 1px solid var(--line-strong);
}

.home-section {
  padding-top: 0;
  border-top: 0;
}

#research {
  padding-top: 2.4rem;
}

.identity {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 380px;
  gap: 4.5rem;
  align-items: center;
  min-height: 350px;
  padding: 1.25rem 0 1.1rem;
}

.identity-copy {
  max-width: 720px;
}

.identity-kicker,
.section-kicker {
  margin: 0 0 0.72rem;
  color: var(--accent);
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 0.76rem;
  font-weight: 700;
  line-height: 1.4;
  text-transform: uppercase;
}

.identity h1,
.page-header h2 {
  margin: 0;
  font-family: "Songti SC", STSong, Georgia, "Times New Roman", serif;
  font-weight: 700;
  line-height: 1.12;
}

.identity h1 {
  display: flex;
  align-items: baseline;
  gap: 1.15rem;
  font-size: 3rem;
}

.identity h1 small {
  color: var(--muted);
  font-family: Georgia, "Times New Roman", serif;
  font-size: 1.25rem;
  font-weight: 400;
}

.identity-title {
  margin: 0.9rem 0 0;
  color: var(--ink-soft);
  font-size: 1.08rem;
  font-weight: 600;
}

.identity-motto {
  margin: 1.15rem 0 0;
  border-left: 4px solid var(--accent);
  color: var(--accent-dark);
  font-family: "Songti SC", STSong, Georgia, serif;
  font-size: 1.55rem;
  font-weight: 700;
  line-height: 1.45;
  padding: 0.22rem 0 0.22rem 0.8rem;
}

.identity-lead {
  max-width: 670px;
  margin: 1rem 0 1.35rem;
  color: var(--ink-soft);
  font-family: "Songti SC", STSong, Georgia, serif;
  font-size: 1.25rem;
  line-height: 1.85;
}

.profile-links,
.paper-links,
.contact-links,
.keyword-list,
.tag-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
}

.profile-links {
  gap: 0;
  margin-bottom: 1.15rem;
}

.profile-links a {
  position: relative;
  color: var(--ink-soft);
  font-size: 0.88rem;
  font-weight: 600;
  padding: 0 0.72rem;
}

.profile-links a:first-child {
  padding-left: 0;
}

.profile-links a + a::before {
  position: absolute;
  left: 0;
  color: var(--line-strong);
  content: "/";
}

.keyword-list {
  gap: 0.45rem;
}

.keyword-list span,
.tag-list span {
  border: 1px solid var(--line);
  border-radius: 3px;
  background: var(--surface-soft);
  color: var(--muted);
  font-size: 0.76rem;
  line-height: 1.4;
  padding: 0.2rem 0.46rem;
}

.keyword-list span:nth-child(2),
.tag-list span:nth-child(2) {
  border-color: #c8d9d6;
  background: #eff6f4;
  color: var(--teal);
}

.keyword-list span:nth-child(3),
.tag-list span:nth-child(3) {
  border-color: #d5ddea;
  background: #f0f4f8;
  color: var(--blue);
}

.identity-profile {
  display: grid;
  grid-template-columns: 148px minmax(0, 1fr);
  gap: 1.25rem;
  align-items: end;
}

.portrait-frame {
  position: relative;
  width: 148px;
  height: 184px;
  border: 1px solid var(--line-strong);
  background: var(--surface-soft);
  padding: 0.35rem;
}

.portrait-frame::after {
  position: absolute;
  right: -7px;
  bottom: -7px;
  width: 42px;
  height: 42px;
  border-right: 2px solid var(--accent);
  border-bottom: 2px solid var(--accent);
  content: "";
}

.portrait-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.affiliation-block {
  padding-bottom: 0.15rem;
}

.affiliation-block p {
  margin: 0 0 0.45rem;
  color: var(--accent);
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 0.68rem;
  font-weight: 700;
}

.affiliation-block strong,
.affiliation-block span {
  display: block;
}

.affiliation-block strong,
.affiliation-block span {
  color: var(--ink);
  font-family: "Songti SC", STSong, Georgia, serif;
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.55;
}

html[lang="zh-CN"] .affiliation-block strong {
  white-space: nowrap;
}

.affiliation-block .visit-role {
  margin-top: 0.5rem;
}

.affiliation-block .visit-institution {
  margin-top: 0;
}

html[lang="zh-CN"] .affiliation-block .visit-role,
html[lang="zh-CN"] .affiliation-block .visit-institution {
  white-space: nowrap;
}

.section-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 3rem;
}

.page-section > .section-heading {
  margin-bottom: 1.35rem;
}

.section-heading h2,
.research-group-heading h2,
.contact-panel h2 {
  margin: 0;
  font-family: "Songti SC", STSong, Georgia, serif;
  font-size: 1.62rem;
  line-height: 1.3;
}

.section-heading > p {
  max-width: 430px;
  margin: 0 0 0.15rem;
  color: var(--muted);
  font-size: 0.9rem;
  text-align: right;
}

.research-overview {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.85rem;
}

.research-card {
  display: grid;
  grid-template-columns: 132px minmax(0, 1fr);
  min-height: 136px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--surface);
}

.research-card:nth-child(1) {
  border-top-color: var(--accent);
}

.research-card:nth-child(2) {
  border-top-color: var(--teal);
}

.research-card:nth-child(3) {
  border-top-color: var(--blue);
}

.research-card:nth-child(4) {
  border-top-color: var(--gold);
}

.research-figure {
  min-width: 0;
  margin: 0;
  background: var(--surface-soft);
}

.research-figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.research-body {
  min-width: 0;
  padding: 0.85rem 0.9rem;
}

.research-index {
  display: block;
  margin-bottom: 0.18rem;
  color: var(--accent);
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 0.67rem;
  font-weight: 700;
}

.research-card:nth-child(2) .research-index {
  color: var(--teal);
}

.research-card:nth-child(3) .research-index {
  color: var(--blue);
}

.research-card:nth-child(4) .research-index {
  color: var(--gold);
}

.research-body h3 {
  margin: 0 0 0.28rem;
  font-family: "Songti SC", STSong, Georgia, serif;
  font-size: 0.98rem;
  line-height: 1.45;
}

.research-body p {
  overflow: hidden;
  margin: 0 0 0.5rem;
  color: var(--muted);
  font-size: 0.82rem;
  line-height: 1.55;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.tag-list {
  flex-wrap: nowrap;
  gap: 0.32rem;
  overflow: hidden;
}

.tag-list span {
  flex: 0 0 auto;
  font-size: 0.67rem;
  padding: 0.12rem 0.34rem;
}

.page-header {
  max-width: 850px;
  margin-bottom: 3.25rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--line-strong);
}

.page-header h2 {
  font-size: 2.45rem;
}

.page-header > p:last-child {
  max-width: 760px;
  margin: 1rem 0 0;
  color: var(--muted);
  font-size: 1rem;
}

.page-header-row {
  display: flex;
  max-width: none;
  align-items: end;
  justify-content: space-between;
  gap: 2rem;
}

.research-group + .research-group {
  margin-top: 4rem;
}

.research-group-heading {
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr);
  align-items: center;
  gap: 1.1rem;
  margin-bottom: 0.45rem;
}

.research-group-heading > span {
  color: var(--accent);
  font-family: Georgia, "Times New Roman", serif;
  font-size: 1.15rem;
  font-weight: 700;
}

.featured-list {
  border-top: 1px solid var(--line-strong);
}

.paper-feature {
  display: grid;
  grid-template-columns: 250px minmax(0, 1fr);
  gap: 1.6rem;
  align-items: start;
  padding: 1.4rem 0;
  border-bottom: 1px solid var(--line);
}

.paper-image {
  position: relative;
  overflow: hidden;
  margin: 0;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: var(--surface-soft);
}

.paper-image img {
  width: 100%;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  transition: transform 280ms ease;
}

.paper-feature:hover .paper-image img {
  transform: scale(1.018);
}

.paper-image figcaption {
  position: absolute;
  left: 0.5rem;
  top: 0.5rem;
  border-left: 3px solid var(--accent);
  border-radius: 2px;
  background: rgba(23, 32, 39, 0.92);
  color: #fff;
  font-size: 0.68rem;
  font-weight: 700;
  line-height: 1.4;
  padding: 0.2rem 0.42rem;
}

.paper-copy h3 {
  max-width: 790px;
  margin: 0 0 0.65rem;
  font-family: Georgia, "Times New Roman", "Songti SC", STSong, serif;
  font-size: 1.08rem;
  line-height: 1.48;
}

.paper-copy p {
  max-width: 780px;
  margin: 0 0 0.85rem;
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.72;
}

.paper-links {
  gap: 0.4rem;
}

.paper-links a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 3.2rem;
  min-height: 1.8rem;
  border: 1px solid var(--line-strong);
  border-radius: 3px;
  background: var(--surface);
  color: var(--ink-soft);
  font-size: 0.76rem;
  font-weight: 700;
  padding: 0.18rem 0.52rem;
}

.paper-links a:first-child {
  border-color: var(--accent);
  color: var(--accent-dark);
}

.paper-links a:hover {
  background: var(--surface-soft);
  text-decoration: none;
}

.publication-filters {
  display: inline-flex;
  overflow: hidden;
  border: 1px solid var(--line-strong);
  border-radius: 4px;
  background: var(--surface);
}

.publication-filters button {
  min-height: 2.35rem;
  border: 0;
  border-right: 1px solid var(--line);
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  font-size: 0.82rem;
  padding: 0.35rem 0.8rem;
  white-space: nowrap;
}

.publication-filters button:last-child {
  border-right: 0;
}

.publication-filters button:hover {
  background: var(--surface-soft);
  color: var(--ink);
}

.publication-filters button.active {
  background: var(--ink);
  color: #fff;
}

.publication-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line-strong);
}

.publication-item {
  display: grid;
  grid-template-columns: 60px minmax(0, 1fr) auto;
  gap: 1.2rem;
  align-items: start;
  padding: 1.1rem 0;
  border-bottom: 1px solid var(--line);
}

.publication-index {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  line-height: 1.2;
}

.publication-index span {
  color: var(--accent);
  font-family: Georgia, "Times New Roman", serif;
  font-size: 1rem;
  font-weight: 700;
}

.publication-index time {
  margin-top: 0.3rem;
  color: var(--muted);
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 0.68rem;
}

.publication-item > p {
  margin: 0;
  color: var(--ink-soft);
  font-family: Georgia, "Times New Roman", "Songti SC", STSong, serif;
  font-size: 0.92rem;
  line-height: 1.67;
}

.publication-item strong {
  color: var(--ink);
  font-weight: 700;
}

.publication-note {
  color: var(--accent-dark);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 0.8rem;
  white-space: normal;
}

.paper-links.compact {
  flex-wrap: nowrap;
  justify-content: flex-end;
  padding-top: 0.05rem;
}

.paper-links.compact a {
  min-width: 2.9rem;
  min-height: 1.65rem;
  font-size: 0.7rem;
}

.publication-empty {
  color: var(--muted);
  padding: 2rem 0;
}

.timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line-strong);
}

.timeline li {
  position: relative;
  display: grid;
  grid-template-columns: 230px minmax(0, 1fr);
  gap: 2rem;
  min-height: 126px;
  padding: 1.6rem 0;
  border-bottom: 1px solid var(--line);
}

.timeline li::before {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 215px;
  width: 1px;
  background: var(--line);
  content: "";
}

.timeline li::after {
  position: absolute;
  top: 2.05rem;
  left: 211px;
  width: 7px;
  height: 7px;
  border: 2px solid var(--surface);
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 1px var(--accent);
  content: "";
}

.timeline-date {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.timeline-date > span {
  color: var(--accent);
  font-family: Georgia, "Times New Roman", serif;
  font-size: 0.8rem;
  font-weight: 700;
}

.timeline-date time {
  margin-top: 0.35rem;
  color: var(--muted);
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 0.78rem;
}

.timeline-copy {
  padding-left: 0.6rem;
}

.timeline-copy h2 {
  margin: 0;
  font-family: "Songti SC", STSong, Georgia, serif;
  font-size: 1.22rem;
  line-height: 1.4;
}

.timeline-copy p {
  margin: 0.35rem 0 0;
  color: var(--ink-soft);
}

.timeline-copy small {
  display: block;
  margin-top: 0.42rem;
  color: var(--muted);
  font-size: 0.85rem;
}

.about-layout {
  display: grid;
  grid-template-columns: minmax(0, 760px) minmax(250px, 1fr);
  gap: 5rem;
  align-items: start;
}

.about-prose p {
  margin: 0 0 1.3rem;
  color: var(--ink-soft);
  font-family: "Songti SC", STSong, Georgia, serif;
  font-size: 1.06rem;
  line-height: 2;
}

.about-prose .about-lead {
  color: var(--ink);
  font-size: 1.28rem;
  line-height: 1.9;
}

.contact-panel {
  border-top: 3px solid var(--ink);
  padding-top: 1rem;
}

.contact-panel h2 {
  font-size: 1.28rem;
}

.contact-panel > p:not(.section-kicker) {
  margin: 0.8rem 0 1.1rem;
  color: var(--muted);
  font-size: 0.88rem;
}

.contact-links {
  align-items: flex-start;
  flex-direction: column;
  gap: 0.42rem;
}

.contact-links a {
  color: var(--ink-soft);
  font-size: 0.84rem;
  overflow-wrap: anywhere;
}

.notes-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.note-card {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--surface);
}

.note-image {
  display: block;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
  background: var(--surface-soft);
}

.note-image img {
  width: 100%;
  aspect-ratio: 3 / 2;
  object-fit: contain;
  padding: 0.45rem;
  transition: transform 280ms ease;
}

.note-card:hover .note-image img {
  transform: scale(1.018);
}

.note-copy {
  padding: 1rem 1rem 1.15rem;
}

.note-meta {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  margin-bottom: 0.55rem;
  color: var(--accent);
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 0.68rem;
  font-weight: 700;
}

.note-meta em {
  color: var(--muted);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  font-style: normal;
  font-weight: 600;
}

.note-copy h3 {
  margin: 0;
  font-family: "Songti SC", STSong, Georgia, serif;
  font-size: 1.03rem;
  line-height: 1.55;
}

.note-copy h3 a {
  color: var(--ink);
}

.note-copy h3 a:hover {
  color: var(--accent-dark);
}

.note-copy p {
  margin: 0.7rem 0 0.85rem;
  color: var(--muted);
  font-size: 0.84rem;
  line-height: 1.7;
}

.note-link {
  color: var(--accent-dark);
  font-size: 0.78rem;
  font-weight: 700;
}

.notes-archive {
  margin-top: 2.2rem;
  border-top: 1px solid var(--line-strong);
}

.notes-archive[hidden] {
  display: none;
}

.notes-archive > h3 {
  margin: 0;
  padding: 1rem 0 0.7rem;
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0;
  text-transform: uppercase;
}

.notes-archive-list {
  margin: 0;
  padding: 0;
  border-bottom: 1px solid var(--line);
  list-style: none;
}

.notes-archive-list li {
  border-top: 1px solid var(--line);
}

.notes-archive-list a {
  display: grid;
  grid-template-columns: 6.5rem minmax(0, 1fr) 1.25rem;
  align-items: center;
  gap: 0.85rem;
  min-height: 4.6rem;
  color: var(--ink);
}

.notes-archive-list a:hover strong,
.notes-archive-list a:focus-visible strong {
  color: var(--accent-dark);
}

.notes-archive-date {
  color: var(--muted);
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 0.7rem;
  font-weight: 700;
}

.notes-archive-copy {
  display: grid;
  gap: 0.18rem;
  min-width: 0;
}

.notes-archive-copy strong {
  overflow-wrap: anywhere;
  font-family: "Songti SC", STSong, Georgia, serif;
  font-size: 0.96rem;
  line-height: 1.5;
  transition: color 160ms ease;
}

.notes-archive-arrow {
  color: var(--accent);
  font-size: 0.9rem;
  text-align: right;
}

.footer {
  display: flex;
  justify-content: space-between;
  gap: 2rem;
  width: min(var(--max-width), calc(100% - 3rem));
  margin: 0 auto;
  border-top: 1px solid var(--line-strong);
  color: var(--muted);
  font-size: 0.76rem;
  padding: 1.35rem 0 2rem;
}

noscript {
  display: block;
  border-top: 1px solid var(--line);
  padding: 1rem;
  text-align: center;
}

@media (max-width: 980px) {
  .masthead-inner {
    grid-template-columns: minmax(170px, 1fr) auto auto;
    gap: 1.25rem;
  }

  .site-nav {
    gap: 1.15rem;
  }

  .identity {
    grid-template-columns: minmax(0, 1fr) 350px;
    gap: 2rem;
  }

  .identity-profile {
    grid-template-columns: 124px minmax(0, 1fr);
    gap: 1rem;
  }

  .portrait-frame {
    width: 124px;
    height: 158px;
  }

  .about-layout {
    gap: 3rem;
  }

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

@media (max-width: 800px) {
  :root {
    --header-height: 108px;
  }

  .masthead-inner {
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 0.55rem 1rem;
    width: min(var(--max-width), calc(100% - 2rem));
    padding: 0.65rem 0 0;
  }

  .site-nav {
    grid-column: 1 / -1;
    grid-row: 2;
    justify-content: flex-start;
    gap: 1.4rem;
    width: 100%;
    min-height: 40px;
    overflow-x: auto;
    scrollbar-width: none;
  }

  .site-nav::-webkit-scrollbar {
    display: none;
  }

  .language-toggle {
    grid-column: 2;
    grid-row: 1;
  }

  .site-main,
  .footer {
    width: min(var(--max-width), calc(100% - 2rem));
  }

  .site-main {
    padding-top: 2.7rem;
  }

  .identity {
    grid-template-columns: 1fr;
    gap: 2rem;
    padding-top: 0.4rem;
  }

  .identity-profile {
    grid-row: 1;
    grid-template-columns: 118px minmax(0, 1fr);
    max-width: 520px;
  }

  .portrait-frame {
    width: 118px;
    height: 146px;
  }

  .identity h1 {
    font-size: 2.55rem;
  }

  .research-overview {
    grid-template-columns: 1fr;
  }

  .paper-feature {
    grid-template-columns: 220px minmax(0, 1fr);
  }

  .page-header-row {
    align-items: flex-start;
    flex-direction: column;
  }

  .publication-item {
    grid-template-columns: 52px minmax(0, 1fr);
  }

  .publication-item .paper-links {
    grid-column: 2;
    justify-content: flex-start;
  }

  .about-layout {
    grid-template-columns: 1fr;
  }

  .contact-panel {
    max-width: 520px;
  }
}

@media (max-width: 620px) {
  body {
    font-size: 15px;
  }

  .brand-name small {
    display: none;
  }

  .site-nav {
    gap: 1.15rem;
  }

  .site-nav a {
    font-size: 0.84rem;
  }

  .site-main {
    min-height: calc(100vh - 200px);
    padding: 2.25rem 0 3.5rem;
  }

  .identity {
    min-height: 0;
    padding-bottom: 2.75rem;
  }

  .identity h1 {
    align-items: flex-start;
    flex-direction: column;
    gap: 0.35rem;
    font-size: 2.25rem;
  }

  .identity h1 small {
    font-size: 1.05rem;
  }

  .identity-lead {
    font-size: 1.1rem;
  }

  .identity-profile {
    grid-template-columns: 90px minmax(0, 1fr);
    gap: 0.75rem;
  }

  .portrait-frame {
    width: 90px;
    height: 112px;
  }

  html[lang="zh-CN"] .affiliation-block strong,
  html[lang="zh-CN"] .affiliation-block span {
    font-size: 0.82rem;
  }

  .section-heading {
    align-items: flex-start;
    flex-direction: column;
    gap: 0.4rem;
  }

  .section-heading > p {
    text-align: left;
  }

  .research-card {
    grid-template-columns: 112px minmax(0, 1fr);
    min-height: 126px;
  }

  .research-body {
    padding: 0.68rem 0.72rem;
  }

  .research-body h3 {
    font-size: 0.9rem;
  }

  .tag-list span:nth-child(n + 3) {
    display: none;
  }

  .page-header {
    margin-bottom: 2.35rem;
    padding-bottom: 1.4rem;
  }

  .page-header h2 {
    font-size: 2rem;
  }

  .research-group + .research-group {
    margin-top: 3rem;
  }

  .research-group-heading {
    grid-template-columns: 38px minmax(0, 1fr);
    gap: 0.65rem;
  }

  .research-group-heading h2 {
    font-size: 1.32rem;
  }

  .paper-feature {
    grid-template-columns: 1fr;
    gap: 1rem;
  }

  .paper-image {
    width: 100%;
    max-width: 430px;
  }

  .publication-filters {
    width: 100%;
  }

  .publication-filters button {
    flex: 1 1 0;
    padding-right: 0.35rem;
    padding-left: 0.35rem;
  }

  .publication-item {
    gap: 0.8rem;
  }

  .publication-note {
    display: block;
    margin-top: 0.3rem;
  }

  .timeline li {
    grid-template-columns: 1fr;
    gap: 0.8rem;
    padding-left: 1.4rem;
  }

  .timeline li::before {
    left: 3px;
  }

  .timeline li::after {
    top: 2.05rem;
    left: 0;
  }

  .timeline-copy {
    padding-left: 0;
  }

  .footer {
    align-items: flex-start;
    flex-direction: column;
    gap: 0.35rem;
  }

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

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

  .paper-image img,
  .note-image img {
    transition: none;
  }
}

@media print {
  .masthead,
  .publication-filters,
  .footer {
    display: none;
  }

  .site-main {
    width: 100%;
    padding: 0;
  }

  .paper-feature,
  .publication-item,
  .timeline li {
    break-inside: avoid;
  }
}