:root {
  --paper: #fbfaf7;
  --surface: #ffffff;
  --ink: #20272d;
  --muted: #65717a;
  --accent: #224f68;
  --line: #dcdedb;
  --max-width: 980px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: Georgia, "Times New Roman", serif;
  font-size: 17px;
  line-height: 1.72;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.2em;
}

a:hover,
a:focus-visible {
  color: #102f42;
}

a:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 4px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  border-bottom: 1px solid var(--line);
  background: rgba(251, 250, 247, 0.96);
}

.nav-wrap {
  width: min(calc(100% - 40px), var(--max-width));
  min-height: 68px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
}

.site-name {
  color: var(--ink);
  font-size: 1.12rem;
  font-weight: 700;
  letter-spacing: 0.01em;
  text-decoration: none;
  white-space: nowrap;
}

.site-name span {
  margin-left: 0.35rem;
  color: var(--muted);
  font-weight: 400;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 24px;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 0.86rem;
}

.site-nav a {
  color: var(--muted);
  text-decoration: none;
}

.site-nav a:hover,
.site-nav a:focus-visible,
.site-nav a[aria-current="page"] {
  color: var(--ink);
}

.container {
  width: min(calc(100% - 40px), var(--max-width));
  margin: 0 auto;
}

.intro {
  display: grid;
  grid-template-columns: 190px minmax(0, 1fr);
  gap: clamp(42px, 7vw, 84px);
  align-items: start;
  padding: clamp(72px, 10vw, 118px) 0 76px;
}

.monogram {
  width: 100%;
  aspect-ratio: 1;
  display: block;
  padding: 18px;
  border: 1px solid var(--line);
  background: var(--surface);
}

.eyebrow,
.section-label,
.paper-number {
  margin: 0 0 12px;
  color: var(--muted);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 0.72rem;
  font-weight: 650;
  letter-spacing: 0.14em;
  line-height: 1.4;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  color: var(--ink);
  font-weight: 500;
  line-height: 1.2;
}

h1 {
  margin: 0 0 18px;
  font-size: clamp(2.55rem, 6vw, 4.45rem);
  letter-spacing: -0.035em;
}

h1 .chinese-name {
  display: block;
  margin-top: 0.45rem;
  color: var(--muted);
  font-size: 0.38em;
  font-weight: 400;
  letter-spacing: 0.08em;
}

.lead {
  max-width: 680px;
  margin: 0 0 22px;
  font-size: clamp(1.15rem, 2.2vw, 1.36rem);
  line-height: 1.58;
}

.intro-copy p:not(.eyebrow):not(.lead) {
  max-width: 700px;
  margin: 0 0 16px;
}

.link-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 22px;
  margin-top: 28px;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 0.88rem;
}

.link-row a {
  font-weight: 600;
}

.section {
  display: grid;
  grid-template-columns: 190px minmax(0, 1fr);
  gap: clamp(42px, 7vw, 84px);
  padding: 64px 0;
  border-top: 1px solid var(--line);
  scroll-margin-top: 88px;
}

.section h2 {
  margin: 0;
  font-size: clamp(1.65rem, 3vw, 2.15rem);
  letter-spacing: -0.02em;
}

.section-body > :first-child {
  margin-top: 0;
}

.section-body > :last-child {
  margin-bottom: 0;
}

.research-list,
.paper-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.research-item {
  display: grid;
  grid-template-columns: minmax(190px, 0.75fr) minmax(0, 1.25fr);
  gap: 28px;
  padding: 24px 0;
  border-top: 1px solid var(--line);
}

.research-item:first-child {
  padding-top: 0;
  border-top: 0;
}

.research-item h3 {
  margin: 0;
  font-size: 1.05rem;
  font-weight: 600;
}

.research-item p {
  margin: 0;
  color: #414b52;
}

.cv-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 30px;
  margin: 20px 0 0;
  padding: 0;
  list-style: none;
}

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

.page-intro {
  max-width: 760px;
  padding: clamp(66px, 9vw, 104px) 0 68px;
}

.page-intro h1 {
  margin-bottom: 22px;
}

.page-intro p {
  max-width: 720px;
  margin: 0;
  font-size: 1.16rem;
}

.paper {
  padding: 42px 0;
  border-top: 1px solid var(--line);
}

.paper:first-child {
  padding-top: 0;
  border-top: 0;
}

.paper h3 {
  max-width: 740px;
  margin: 0 0 10px;
  font-size: clamp(1.28rem, 2.5vw, 1.62rem);
}

.paper-meta {
  margin: 0 0 20px;
  color: var(--muted);
  font-style: italic;
}

.paper-abstract {
  margin: 0;
}

.keywords {
  margin: 17px 0 0;
  color: var(--muted);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 0.82rem;
  line-height: 1.65;
}

.site-footer {
  margin-top: 30px;
  border-top: 1px solid var(--line);
}

.footer-wrap {
  width: min(calc(100% - 40px), var(--max-width));
  margin: 0 auto;
  padding: 28px 0 38px;
  display: flex;
  justify-content: space-between;
  gap: 20px;
  color: var(--muted);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 0.78rem;
}

.footer-wrap p {
  margin: 0;
}

@media (max-width: 720px) {
  .nav-wrap {
    min-height: auto;
    padding: 16px 0;
    align-items: flex-start;
  }

  .site-name span {
    display: none;
  }

  .site-nav {
    gap: 14px;
    font-size: 0.8rem;
  }

  .intro,
  .section {
    grid-template-columns: 1fr;
    gap: 30px;
  }

  .intro {
    padding: 58px 0 58px;
  }

  .monogram {
    width: 122px;
    padding: 10px;
  }

  .section {
    padding: 50px 0;
  }

  .research-item {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .footer-wrap {
    flex-direction: column;
    gap: 6px;
  }
}

@media (max-width: 430px) {
  .nav-wrap,
  .container,
  .footer-wrap {
    width: min(calc(100% - 28px), var(--max-width));
  }

  .nav-wrap {
    flex-direction: column;
    gap: 8px;
  }

  .site-name span {
    display: inline;
  }

  .site-nav {
    width: 100%;
    gap: 20px;
  }
}

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