:root {
  --navy: #173b57;
  --blue: #356f9a;
  --blue-deep: #245a82;
  --blue-pale: #edf4f8;
  --paper: #fbfbfa;
  --surface: #ffffff;
  --ink: #252b30;
  --muted: #68727a;
  --line: #dce2e6;
  --line-dark: #aebdc7;
}

html, body {
  background: var(--paper);
  color: var(--ink);
}

body {
  font-family: "Palatino Linotype", "Book Antiqua", Palatino, Georgia, serif;
  font-size: 1.02rem;
  line-height: 1.72;
}

.navbar {
  background: rgba(251, 251, 250, .97) !important;
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(10px);
  min-height: 72px;
  padding-left: 4.5vw;
  padding-right: 4.5vw;
}

.navbar-brand {
  color: var(--navy) !important;
  font-family: Arial, sans-serif;
  font-weight: 800;
  font-size: .96rem;
  letter-spacing: .055em;
  text-transform: uppercase;
}

.navbar-nav .nav-link {
  color: #445866 !important;
  font-family: Arial, sans-serif;
  font-size: .9rem;
  font-weight: 700;
  letter-spacing: .055em;
  text-transform: uppercase;
}

@media (min-width: 992px) {
  .navbar-nav .nav-item {
    margin-left: .38rem;
    margin-right: .38rem;
  }

  html[lang="zh-CN"] .navbar-nav .nav-item {
    margin-left: .68rem;
    margin-right: .68rem;
  }
}

html[lang="zh-CN"] .navbar-nav .nav-link {
  font-size: .98rem;
  letter-spacing: .08em;
}

.navbar-nav .nav-link:hover,
.navbar-nav .nav-link.active {
  color: var(--blue) !important;
}

.navbar .site-lang-toggle {
  border: 1px solid var(--line-dark);
  padding: .34rem .62rem !important;
  margin-left: .45rem;
  color: var(--blue-deep) !important;
  background: var(--surface);
  text-transform: none;
}
.navbar .site-lang-toggle:hover { background: var(--blue-pale); text-decoration: none; }

#quarto-content {
  min-height: calc(100vh - 138px);
}

main.content {
  max-width: 1060px;
  padding-top: 3.4rem;
  padding-bottom: 4.2rem;
}

.quarto-title-block .quarto-title h1,
.quarto-title h1 {
  color: var(--navy);
  font-size: clamp(2.2rem, 3.6vw, 3.1rem);
  letter-spacing: -.045em;
  font-weight: 700;
  margin-bottom: .6rem;
}

.quarto-title-block .quarto-title,
.quarto-title {
  text-align: center;
}

h2 {
  color: var(--navy);
  font-size: 1.55rem;
  letter-spacing: -.018em;
  border-bottom: 1px solid var(--line-dark);
  padding-bottom: .72rem;
  margin-top: 3.7rem;
  margin-bottom: 0;
}

.section-eyebrow,
.eyebrow {
  font: 800 .7rem Arial, sans-serif;
  color: var(--blue);
  letter-spacing: .18em;
  text-transform: uppercase;
}

/* Home */
.home-wrap {
  width: min(1240px, calc(100% - 8vw));
  margin: 0 auto;
  padding: clamp(4.2rem, 8vh, 6.5rem) 0 6rem;
}

.home-grid {
  display: grid;
  grid-template-columns: minmax(252px, 288px) minmax(0, 1fr);
  gap: clamp(3.25rem, 6vw, 5.5rem);
  align-items: start;
}

.home-photo { min-width: 0; }
.profile-photo {
  display: block;
  width: 100%;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  object-position: center top;
  border: 1px solid var(--line);
  background: var(--surface);
}
.home-photo .home-role {
  margin-top: 1rem;
  padding-top: .95rem;
  border-top: 2px solid var(--navy);
}

.home-identity {
  border-top: 3px solid var(--navy);
  padding-top: 1.35rem;
}

.home-identity h1 {
  color: var(--navy);
  font-size: clamp(3.4rem, 6vw, 5.45rem);
  line-height: .98;
  letter-spacing: -.055em;
  margin: 1.1rem 0 1.6rem;
  font-weight: 700;
}

.home-role {
  color: #435762;
  font-size: 1.28rem;
  line-height: 1.5;
}

.home-links {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: .42rem;
  margin-top: 2.1rem;
  padding-top: 1.05rem;
  border-top: 1px solid var(--line);
  width: min(280px, 100%);
}

.home-links a {
  color: var(--blue-deep);
  text-decoration: none;
  font: 700 .82rem Arial, sans-serif;
  letter-spacing: .035em;
}

.home-links a:hover { text-decoration: underline; }

.home-profile {
  padding-top: 0;
  max-width: none;
}

.home-profile h2 {
  margin-top: 0;
  border-bottom: 0;
  padding-bottom: 0;
  font-size: 1.35rem;
}

.home-profile p {
  font-size: 1.16rem;
  line-height: 1.8;
  color: #38444b;
  margin-top: 0;
}

.profile-section {
  margin-top: 2.35rem;
  padding-top: 1.1rem;
  border-top: 1px solid var(--line);
}

html[lang="en"] .home-profile .profile-section {
  margin-top: 1.65rem;
  padding-top: .78rem;
}

html[lang="en"] #home-about-text {
  font-size: 1.08rem;
}

html[lang="en"] .home-profile .profile-label {
  font-size: .78rem;
}

html[lang="zh-CN"] #home-about-text {
  text-indent: 2em;
}

.profile-label {
  font: 400 .84rem Arial, sans-serif;
  letter-spacing: .105em;
  text-transform: uppercase;
  color: var(--blue);
  margin-bottom: .78rem;
}

.interest-list {
  color: #3c4e59;
  font-size: 1.06rem;
  white-space: nowrap;
}

.interest-list span { color: var(--line-dark); padding: 0 .35rem; }
.contact-block { color: var(--muted); font-size: 1.02rem; }
.contact-emails { white-space: nowrap; }
.contact-emails span { color: var(--line-dark); padding: 0 .32rem; }

/* Research */
.research-intro {
  max-width: 780px;
  color: #4c5a63;
  font-size: 1.14rem;
  line-height: 1.72;
  margin-top: .9rem;
}

.research-fields {
  display: flex;
  flex-wrap: wrap;
  gap: .55rem;
  margin: 1.55rem 0 2.3rem;
}

.research-fields span {
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--blue-deep);
  padding: .42rem .68rem;
  font: 700 .71rem Arial, sans-serif;
  letter-spacing: .025em;
}

.paper-list { border-top: 1px solid var(--navy); }
.paper-item {
  border-bottom: 1px solid var(--line);
  padding: 1.45rem 0 1.5rem;
}
.paper-title {
  color: var(--ink);
  font-size: 1.14rem;
  line-height: 1.42;
  font-weight: 700;
  max-width: 920px;
}
.paper-authors {
  color: #55636b;
  font-size: .96rem;
  margin-top: .34rem;
}
.paper-venue {
  color: var(--blue-deep);
  font-size: .92rem;
  margin-top: .18rem;
}
.publication-note {
  margin-top: .72rem;
  color: var(--muted);
  font-size: .88rem;
}

.paper-item.has-pdf {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 1.5rem;
  align-items: center;
}
.paper-pdf {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 70px;
  padding: .48rem .65rem;
  border: 1px solid var(--line-dark);
  color: var(--blue-deep);
  background: var(--surface);
  text-decoration: none;
  font: 800 .71rem Arial, sans-serif;
  letter-spacing: .035em;
}
.paper-pdf:hover { background: var(--blue-pale); color: var(--navy); }

.research-grants { border-top: 1px solid var(--navy); }
.research-grant {
  padding: 1.35rem 0 1.45rem;
  border-bottom: 1px solid var(--line);
}
.research-grant-head {
  display: flex;
  justify-content: space-between;
  gap: 1.5rem;
  color: var(--ink);
}
.research-grant-head span {
  color: var(--blue-deep);
  font-size: .9rem;
  white-space: nowrap;
}
.research-grant-project {
  margin-top: .3rem;
  color: #45535c;
  font-style: italic;
}
.research-grant-role {
  margin-top: .2rem;
  color: var(--muted);
  font-size: .92rem;
}

/* CV */
body:has(.cv-page) main.content {
  max-width: none;
  padding: 0;
}
body:has(.cv-page) .quarto-title-block { display: none; }
.cv-page {
  width: min(1060px, calc(100% - 10vw));
  margin: 0 auto;
  padding: 4rem 0 5rem;
}
.cv-heading-row {
  display: flex;
  align-items: end;
  justify-content: center;
  gap: 2rem;
  padding-bottom: 1.2rem;
  border-bottom: 2px solid var(--navy);
}
.cv-heading-row h1 {
  margin: 0;
  color: var(--navy);
  font-size: clamp(2.2rem, 3.6vw, 3.1rem);
  line-height: 1;
  letter-spacing: -.045em;
}
.cv-heading-row h1 {
  text-align: center;
  width: 100%;
}
.cv-section {
  display: grid;
  grid-template-columns: minmax(180px, .28fr) minmax(0, 1fr);
  gap: 2.4rem;
  padding: 2rem 0;
  border-bottom: 1px solid var(--line);
}
.cv-section h2 {
  margin: 0;
  padding: .15rem 0 0;
  border: 0;
  color: var(--navy);
  font-size: 1.03rem;
  line-height: 1.35;
}
.cv-lines, .cv-simple-list, .cv-contact { display: grid; gap: .55rem; }
.cv-line {
  display: grid;
  grid-template-columns: 120px minmax(0, 1fr);
  gap: 1rem;
}
.cv-date {
  color: inherit;
  font-family: "Times New Roman", Times, serif;
  font-size: inherit;
  font-weight: 400;
  line-height: inherit;
  padding-top: 0;
}
.cv-numbered {
  margin: 0;
  padding-left: 1.25rem;
}
.cv-numbered li {
  padding-left: .3rem;
  margin-bottom: .82rem;
  line-height: 1.58;
}
.cv-numbered li:last-child { margin-bottom: 0; }
.cv-numbered em { color: var(--navy); }
.cv-coauthor { color: var(--muted); }
.cv-note {
  color: var(--muted);
  font-size: .84rem;
  margin-top: .8rem;
}
.cv-grants { display: grid; gap: 1.15rem; }
.cv-grant { padding-bottom: 1.05rem; border-bottom: 1px solid var(--line); }
.cv-grant:last-child { border-bottom: 0; padding-bottom: 0; }
.cv-grant-head {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  color: var(--ink);
}
.cv-grant-head span { color: var(--blue-deep); font-size: .9rem; white-space: nowrap; }
.cv-grant-project { margin-top: .28rem; font-style: italic; color: #45535c; }
.cv-grant-role { margin-top: .2rem; color: var(--muted); font-size: .92rem; }
.cv-teaching { display: grid; gap: 1.2rem; }
.cv-teaching-group > strong { color: var(--ink); }
.cv-course {
  display: flex;
  justify-content: space-between;
  gap: 1.5rem;
  margin-top: .42rem;
  color: #45535c;
}
.cv-course span:last-child { color: var(--muted); white-space: nowrap; }
.cv-referee { line-height: 1.72; color: #45535c; }
.cv-contact { color: #45535c; }

/* Profile */
.profile-page { width: 100%; }

/* Teaching */
.teaching-content { width: 100%; }
.teaching-content .teaching-section { padding: 0 0 2.8rem; }
.teaching-content .teaching-section + .teaching-section { border-top: 0; }
.teaching-content .course-grid { margin-top: 1.5rem; }
.teaching-content .book-row { margin-top: 1.5rem; }
.teaching-content .lecture-list { margin-top: 1.5rem; }

body:has(.teaching-page) main.content {
  max-width: none;
  padding: 0;
}
body:has(.teaching-page) .quarto-title-block { display: none; }

.teaching-page {
  width: min(1180px, calc(100% - 10vw));
  margin: 0 auto;
  padding: 4rem 0 5rem;
}

.teaching-topline {
  display: flex;
  justify-content: space-between;
  align-items: end;
  gap: 2rem;
  padding-bottom: 1.25rem;
  border-bottom: 2px solid var(--navy);
}

.teaching-deck {
  color: var(--muted);
  font-size: 1rem;
  margin-top: .52rem;
}

.lang-switch {
  border: 1px solid var(--line-dark);
  background: var(--surface);
  color: var(--blue-deep);
  padding: .48rem .78rem;
  font: 700 .75rem Arial, sans-serif;
  letter-spacing: .04em;
  cursor: pointer;
}
.lang-switch:hover { background: var(--blue-pale); }

.teaching-section { padding: 2.7rem 0 3rem; }
.teaching-section + .teaching-section { border-top: 1px solid var(--line); }
.teaching-section-label {
  font: 800 .71rem Arial, sans-serif;
  color: var(--blue);
  letter-spacing: .15em;
  text-transform: uppercase;
  margin-bottom: 1.25rem;
}

.course-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  max-width: 100%;
}
.course-card {
  border: 1px solid var(--line);
  background: var(--surface);
  min-height: 168px;
  padding: 1.35rem 1.5rem;
}
.course-card .course-index {
  color: var(--blue);
  font: 800 .69rem Arial, sans-serif;
  letter-spacing: .11em;
}
.course-card h3 {
  color: var(--navy);
  font-size: clamp(1.55rem, 2vw, 1.72rem);
  line-height: 1.2;
  font-weight: 1000;
  letter-spacing: -.015em;
  margin: 0 0 .82rem;
}
.course-card ul {
  margin: 0;
  padding-left: 1.2rem;
  color: #46545d;
  font-size: 1.2rem;
  line-height: 1.82;
}
html[lang="zh-CN"] .course-card h3 { font-size: clamp(1.62rem, 2vw, 1.78rem); }
html[lang="zh-CN"] .course-card ul { font-size: 1.3rem; }

.book-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  padding: 1.5rem 0 .4rem;
  border-top: 2px solid var(--navy);
}
.book-copy { min-width: 0; }
.book-name {
  color: var(--navy);
  font-size: clamp(1.75rem, 2.5vw, 2.3rem);
  line-height: 1.1;
  font-weight: 700;
  letter-spacing: -.025em;
}
.book-subtitle {
  color: var(--muted);
  font-size: 1.34rem;
  line-height: 1.35;
  font-style: italic;
  margin-top: .4rem;
}
html[lang="zh-CN"] .book-subtitle {
  font-size: 1.46rem;
  line-height: 1.4;
}
.book-action {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 48px;
  box-sizing: border-box;
  border: 1px solid var(--blue);
  padding: .65rem 1.05rem;
  text-align: center;
  text-decoration: none;
  background: var(--blue);
  color: #fff;
  font: 800 .74rem Arial, sans-serif;
  line-height: 1.2;
  letter-spacing: .035em;
  white-space: nowrap;
}

.book-action {
  flex: 0 0 141px;
  width: 141px;
}
.book-action:hover { background: var(--navy); color: #fff; }

.lecture-list { border-top: 2px solid var(--navy); }
.lecture-row {
  display: grid;
  grid-template-columns: 64px minmax(0, 1fr) 141px;
  gap: 1.45rem;
  align-items: center;
  padding: 1.3rem 0;
  border-bottom: 1px solid var(--line);
}
.lecture-number {
  color: var(--blue);
  font: 800 clamp(1.45rem, 2vw, 1.9rem) Arial, sans-serif;
  letter-spacing: -.04em;
}
.lecture-meta {
  color: var(--muted);
  font: 700 .67rem Arial, sans-serif;
  letter-spacing: .09em;
  text-transform: uppercase;
}
.lecture-title {
  color: var(--ink);
  font-size: clamp(1.12rem, 1.55vw, 1.45rem);
  line-height: 1.25;
  font-weight: 700;
  margin-top: .25rem;
}
.lecture-resources {
  width: 141px;
  justify-self: end;
}
.slide-link { background: var(--blue); color: #fff; }

.nav-footer {
  border-top: 1px solid var(--line);
  color: var(--muted);
  background: var(--paper);
  font-family: Arial, sans-serif;
  font-size: .72rem;
  letter-spacing: .045em;
}

@media (max-width: 1120px) {
  .interest-list { white-space: normal; }
}

@media (max-width: 900px) {
  .home-grid { grid-template-columns: 1fr; gap: 3.5rem; }
  .home-profile { max-width: 760px; }
  .profile-photo { width: min(320px, 100%); }
  .lecture-row { grid-template-columns: 52px minmax(0, 1fr); }
  .lecture-resources { grid-column: 2; }
}

@media (max-width: 700px) {
  .navbar { padding-left: 1rem; padding-right: 1rem; }
  main.content { padding-left: 1.15rem; padding-right: 1.15rem; }
  .home-wrap, .teaching-page { width: min(100% - 2.2rem, 1120px); }
  .home-wrap { padding-top: 3.5rem; }
  .home-identity h1 { font-size: clamp(3.15rem, 17vw, 4.8rem); }
  .course-grid { grid-template-columns: 1fr; }
  .book-row { align-items: flex-start; flex-direction: column; }
  .lecture-row { grid-template-columns: 40px minmax(0, 1fr); gap: .9rem; padding: 1.4rem 0; }
  .lecture-resources { grid-column: 1 / -1; }
  .lecture-resources { justify-self: start; }
  .contact-emails { white-space: normal; }
  .research-grant-head { align-items: flex-start; flex-direction: column; gap: .1rem; }
  .cv-page { width: min(100% - 2.2rem, 1060px); padding-top: 3.2rem; }
  .cv-heading-row { align-items: center; }
  .cv-section { grid-template-columns: 1fr; gap: .9rem; padding: 1.6rem 0; }
  .cv-section h2 { font-size: 1.08rem; }
  .cv-line { grid-template-columns: 1fr; gap: .15rem; }
  .cv-grant-head { align-items: flex-start; flex-direction: column; gap: .1rem; }
  .cv-course { align-items: flex-start; flex-direction: column; gap: .05rem; }
  .cv-course span:last-child { white-space: normal; }
  .paper-item.has-pdf { grid-template-columns: 1fr; gap: .75rem; }
  .paper-pdf { justify-self: start; }
  .teaching-topline { align-items: center; }
}