:root {
  --bg: #050505;
  --text: #f6f6f3;
  --muted: #b3b3ad;
  --faint: #7a7a75;
  --line: #292929;
  --soft: #111111;
  --max: 1840px;
  --page-gutter: clamp(72px, 10vw, 220px);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: Arial, Helvetica, sans-serif;
  font-size: 16px;
  line-height: 1.65;
}

a {
  color: var(--text);
  text-decoration-color: var(--line);
  text-underline-offset: 0.22em;
}

a:hover {
  text-decoration-color: var(--text);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: clamp(18px, 3vw, 34px);
  min-height: 156px;
  padding: 0 max(calc(var(--page-gutter) / 2), calc((100vw - var(--max)) / 2));
  background: rgba(0, 0, 0, 0.94);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(12px);
}

.brand {
  display: inline-flex;
  align-items: center;
  flex: 0 0 auto;
  text-decoration: none;
}

.brand img {
  display: block;
  width: clamp(260px, 23vw, 460px);
  height: auto;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: clamp(16px, 2.1vw, 24px);
  margin-left: auto;
}

.site-nav a {
  color: var(--muted);
  font-size: 18px;
  font-weight: 600;
  letter-spacing: 0.01em;
  text-decoration: none;
}

.site-nav a:hover,
.site-nav a.active {
  color: var(--text);
}

.lang-toggle {
  min-width: 72px;
  min-height: 48px;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: transparent;
  color: var(--muted);
  font: inherit;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
}

.lang-toggle:hover {
  color: var(--text);
  border-color: var(--muted);
}

.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: var(--bg);
  padding: 9px;
}

.nav-toggle span {
  display: block;
  height: 1px;
  margin: 6px 0;
  background: var(--text);
}

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

.profile-section {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 240px;
  gap: clamp(34px, 7vw, 88px);
  align-items: center;
  padding: clamp(58px, 9vw, 108px) 0 54px;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--muted);
  font-size: 13px;
}

.zh,
.zh-title {
  display: none;
}

.zh {
  margin-top: 5px;
  color: var(--faint);
  font-size: 0.94em;
  line-height: 1.7;
}

.zh-title {
  margin-top: 4px;
  color: var(--faint);
  font-size: 0.58em;
  font-weight: 400;
}

h1,
h2,
h3,
p {
  overflow-wrap: anywhere;
}

h1 {
  margin: 0 0 24px;
  font-size: clamp(42px, 6vw, 68px);
  font-weight: 500;
  letter-spacing: 0;
  line-height: 1.05;
}

h2 {
  margin: 0;
  font-size: 26px;
  font-weight: 500;
  line-height: 1.25;
}

h3 {
  margin: 0 0 6px;
  font-size: 17px;
  font-weight: 600;
  line-height: 1.35;
}

.lead {
  max-width: 760px;
  margin: 0 0 20px;
  font-size: clamp(19px, 2.2vw, 23px);
  line-height: 1.48;
}

.lead.zh {
  margin-top: -8px;
  font-size: 18px;
}

.profile-copy p:not(.eyebrow):not(.lead) {
  max-width: 1040px;
  margin: 0 0 18px;
  color: var(--muted);
}

.profile-copy strong {
  color: var(--text);
  font-weight: 600;
}

.profile-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
  margin-top: 28px;
}

.profile-actions a,
.paper-links a {
  color: var(--text);
  font-size: 14px;
  text-decoration-color: var(--line);
}

.profile-card {
  display: grid;
  gap: 16px;
}

.profile-card img {
  display: block;
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  filter: grayscale(1);
}

.profile-meta {
  display: grid;
  gap: 4px;
  color: var(--muted);
  font-size: 17px;
  line-height: 1.38;
}

.profile-meta strong {
  color: var(--text);
  font-size: 22px;
  font-weight: 600;
}

.news-section,
.content-section {
  padding: 48px 0;
  border-top: 1px solid var(--line);
}

.section-heading {
  display: grid;
  grid-template-columns: 190px minmax(0, 1fr);
  gap: 36px;
  align-items: baseline;
  margin-bottom: 26px;
}

.section-heading p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

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

.news-list li {
  display: grid;
  grid-template-columns: 120px minmax(0, 1fr);
  gap: 22px;
  padding: 14px 0;
  border-top: 1px solid var(--line);
}

.news-list time {
  color: var(--faint);
  font-size: 14px;
}

.news-list p,
.simple-list {
  margin: 0;
}

.theme-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 32px;
}

.theme-grid article,
.publication-list article {
  padding: 0;
  background: transparent;
}

.theme-grid p,
.publication-list p {
  margin: 0;
  color: var(--muted);
}

.research-media {
  display: block;
  width: 100%;
  margin-top: 18px;
  aspect-ratio: 16 / 10;
  background: #000;
  object-fit: cover;
}

.theme-grid p + p,
.course-list p + p {
  margin-top: 10px;
}

.publication-list {
  display: grid;
  gap: 0;
}

.publication-list article {
  display: grid;
  gap: 5px;
  padding: 20px 0;
  border-top: 1px solid var(--line);
}

.venue {
  color: var(--muted);
  font-size: 14px;
}

.paper-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 4px;
}

.see-all {
  padding: 18px 0 0;
  border-top: 1px solid var(--line);
}

.see-all a {
  font-size: 14px;
}

.split-section {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 0.8fr);
  gap: 42px;
}

.split-section p {
  margin-bottom: 0;
  color: var(--muted);
}

.simple-list {
  padding-left: 18px;
  color: var(--muted);
}

.simple-list li + li {
  margin-top: 8px;
}

.course-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 36px;
}

.course-list article {
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

.course-list p {
  margin: 0;
  color: var(--muted);
}

.contact-section {
  display: grid;
  grid-template-columns: 190px minmax(0, 1fr);
  gap: 36px;
}

.contact-section p {
  margin: 0;
  color: var(--muted);
}

.site-footer {
  width: min(var(--max), calc(100% - var(--page-gutter)));
  margin: 0 auto;
  padding: 28px 0 48px;
  border-top: 1px solid var(--line);
  color: var(--faint);
  font-size: 13px;
}

@media (max-width: 980px) {
  :root {
    --page-gutter: 32px;
  }

  .site-header {
    min-height: 78px;
    gap: 12px;
    padding: 0 16px;
  }

  .brand img {
    width: clamp(170px, 42vw, 250px);
  }

  .nav-toggle {
    display: block;
    flex: 0 0 auto;
  }

  .site-nav {
    position: absolute;
    top: 78px;
    right: 16px;
    left: 16px;
    display: none;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    padding: 8px 0;
    background: var(--bg);
    border: 1px solid var(--line);
  }

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

  .lang-toggle {
    margin-left: auto;
    flex: 0 0 auto;
  }

  .site-nav a {
    width: 100%;
    padding: 11px 14px;
    font-size: 16px;
  }

  .profile-section,
  .section-heading,
  .news-list li,
  .split-section,
  .contact-section {
    grid-template-columns: 1fr;
  }

  .profile-section {
    padding-top: 44px;
  }

  .profile-card {
    max-width: 260px;
  }

  .theme-grid {
    grid-template-columns: 1fr;
    gap: 18px;
  }

  .course-list {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 460px) {
  :root {
    --page-gutter: 28px;
  }

  main,
  .site-footer {
    width: min(100% - var(--page-gutter), var(--max));
  }

  body {
    font-size: 15px;
  }

  .lead {
    font-size: 18px;
  }

  .brand img {
    width: 148px;
  }

  .lang-toggle {
    min-width: 54px;
    min-height: 38px;
    font-size: 14px;
  }
}