:root {
  --ink: #1d2524;
  --muted: #5d6865;
  --line: rgba(29, 37, 36, 0.18);
  --accent: #315f59;
  --accent-soft: rgba(49, 95, 89, 0.09);
  --paper: #fbfbfa;
  --max-width: 1220px;
  --nav-height: 96px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "Avenir Next", Avenir, "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  font-size: 17px;
  line-height: 1.72;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -2;
  background-image: linear-gradient(rgba(251,251,250,0.22), rgba(251,251,250,0.22)),
                    url("assets/images/background.jpg");
  background-size: cover;
  background-position: center;
  opacity: 0.98;
}

a {
  color: var(--accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}

a:hover, a:focus { color: #1f453f; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(251, 251, 250, 0.91);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
}

.header-inner {
  width: min(calc(100% - 56px), var(--max-width));
  min-height: var(--nav-height);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
}

.site-name {
  display: inline-block;
  color: var(--ink);
  font-family: Georgia, "Times New Roman", serif;
  font-size: 1.16rem;
  font-weight: 700;
  line-height: 1.02;
  letter-spacing: -0.02em;
  text-decoration: none;
}

.site-name span { display: block; }

.nav-toggle {
  display: none;
  border: 1px solid var(--line);
  background: rgba(255,255,255,0.55);
  color: var(--ink);
  font: inherit;
  padding: 8px 11px;
  cursor: pointer;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 24px;
}

.site-nav a {
  position: relative;
  color: var(--ink);
  font-size: 0.82rem;
  letter-spacing: 0.03em;
  text-decoration: none;
}

.site-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -7px;
  height: 1px;
  background: transparent;
}

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

main {
  width: min(calc(100% - 56px), var(--max-width));
  margin: 0 auto;
}

.hero {
  min-height: calc(100vh - var(--nav-height));
  display: grid;
  grid-template-columns: minmax(300px, 0.95fr) minmax(440px, 1.2fr);
  gap: clamp(42px, 6vw, 86px);
  align-items: center;
  padding: 54px 0 80px;
}

.hero-image img,
.chinese-image img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.hero-image img { aspect-ratio: 1.30 / 1; }

.hero-copy { max-width: 690px; }

h1, h2, h3 {
  font-family: Georgia, "Times New Roman", serif;
  color: var(--ink);
  font-weight: 500;
  letter-spacing: -0.025em;
}

h1 {
  margin: 0 0 18px;
  font-size: clamp(2.35rem, 4vw, 4.2rem);
  line-height: 1.04;
}

h2 {
  margin: 0 0 28px;
  font-size: clamp(1.8rem, 3vw, 3rem);
  line-height: 1.12;
}

h3 {
  margin: 0 0 11px;
  font-size: 1.23rem;
  line-height: 1.22;
}

p { margin: 0 0 18px; }

.small-heading {
  margin: 26px 0 8px;
  color: var(--ink);
  font-family: Georgia, "Times New Roman", serif;
  font-size: 1.16rem;
}

.inline-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0;
  margin-top: 2px;
  font-size: 0.94rem;
}

.inline-links a { text-decoration: none; }

.inline-links a:not(:last-child)::after {
  content: "|";
  margin: 0 8px;
  color: var(--muted);
}

.page-shell {
  min-height: calc(100vh - var(--nav-height));
  padding: 48px 0 88px;
}

.page-title {
  margin-bottom: 38px;
  font-size: clamp(2.45rem, 4vw, 4.35rem);
}

.about-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(260px, 0.58fr);
  gap: clamp(44px, 6vw, 84px);
  align-items: start;
}

.about-photo {
  position: sticky;
  top: calc(var(--nav-height) + 28px);
}

.about-photo img {
  width: 100%;
  max-height: 690px;
  object-fit: cover;
  object-position: center;
  display: block;
}

.section-block + .section-block { margin-top: 44px; }

.timeline {
  display: grid;
  gap: 14px;
  margin: 0;
}

.timeline-row {
  display: grid;
  grid-template-columns: 178px 1fr;
  gap: 18px;
}

.timeline-date {
  color: var(--muted);
  font-size: 0.93rem;
  white-space: nowrap;
}

.timeline-main strong {
  font-weight: 600;
}

.awards {
  display: grid;
  gap: 10px;
}

.award-row {
  display: grid;
  grid-template-columns: 130px 1fr;
  gap: 18px;
}

.download-link {
  display: inline-block;
  margin-top: 18px;
  border: 1px solid var(--ink);
  padding: 9px 16px;
  color: var(--ink);
  font-size: 0.9rem;
  text-decoration: none;
  transition: background-color 160ms ease, color 160ms ease;
}

.download-link:hover,
.download-link:focus {
  background: var(--ink);
  color: #fff;
}

.publication-group + .publication-group { margin-top: 48px; }

.publication-group h2 {
  font-size: clamp(1.55rem, 2.25vw, 2.25rem);
  margin-bottom: 22px;
}

.publication-list {
  counter-reset: publication;
  margin: 0;
  padding: 0;
  list-style: none;
}

.publication-item {
  display: grid;
  grid-template-columns: 28px 1fr;
  gap: 4px;
  padding: 0 0 19px;
}

.publication-item::before {
  counter-increment: publication;
  content: counter(publication) ".";
  color: var(--muted);
  font-size: 0.94rem;
}

.publication-title { font-weight: 400; }

.pdf-link {
  white-space: nowrap;
  text-decoration: none;
}

.chinese-layout {
  min-height: calc(100vh - var(--nav-height));
  display: grid;
  grid-template-columns: minmax(260px, 0.76fr) minmax(430px, 1.35fr);
  gap: clamp(42px, 7vw, 98px);
  align-items: center;
  padding: 50px 0 82px;
}

.chinese-image img {
  aspect-ratio: 3 / 4;
  object-position: center top;
}

.chinese-copy {
  font-family: "Noto Serif SC", "Songti SC", SimSun, serif;
  line-height: 1.96;
}

.chinese-copy h1 {
  font-family: "Noto Serif SC", "Songti SC", SimSun, serif;
  font-size: clamp(2rem, 3vw, 3.15rem);
}

.site-footer {
  width: min(calc(100% - 56px), var(--max-width));
  margin: 0 auto;
  padding: 20px 0 35px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.78rem;
}

@media (max-width: 900px) {
  :root { --nav-height: 82px; }

  .header-inner,
  main,
  .site-footer {
    width: min(calc(100% - 36px), var(--max-width));
  }

  .nav-toggle { display: inline-flex; align-items: center; }

  .site-nav {
    display: none;
    position: absolute;
    top: var(--nav-height);
    left: 0;
    right: 0;
    padding: 16px 18px 20px;
    background: rgba(251, 251, 250, 0.97);
    border-bottom: 1px solid var(--line);
    flex-direction: column;
    align-items: flex-start;
    gap: 14px;
  }

  .site-nav.is-open { display: flex; }

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

  .hero {
    min-height: auto;
    gap: 30px;
    padding: 34px 0 60px;
  }

  .hero-copy { max-width: none; }
  .hero-image img { aspect-ratio: 1.25 / 1; }

  .about-layout { gap: 34px; }
  .about-photo { position: static; order: -1; }
  .about-photo img { max-height: 520px; object-position: center 42%; }

  .chinese-layout {
    min-height: auto;
    gap: 30px;
    padding: 34px 0 62px;
  }

  .chinese-image {
    max-width: 360px;
  }
}

@media (max-width: 620px) {
  body {
    font-size: 16px;
    line-height: 1.66;
  }

  .header-inner,
  main,
  .site-footer {
    width: min(calc(100% - 28px), var(--max-width));
  }

  .timeline-row,
  .award-row {
    grid-template-columns: 1fr;
    gap: 2px;
  }

  .timeline-date,
  .award-row > :first-child {
    margin-top: 4px;
  }

  .publication-item {
    grid-template-columns: 22px 1fr;
    gap: 0;
    padding-bottom: 20px;
  }

  .inline-links {
    line-height: 1.9;
  }
}