:root {
  --page-bg: #f8fafc;
  --card-bg: #ffffff;
  --primary: #0f766e;
  --secondary: #0f172a;
  --accent: #14b8a6;
  --primary-soft: #0b5d57;
  --text: #0f172a;
  --muted: #475569;
  --border: #e2e8f0;
  --shadow: 0 18px 42px rgba(15, 23, 42, 0.05);
  --content-width: 1040px;
  --card-radius: 10px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background:
    radial-gradient(circle at top, rgba(20, 184, 166, 0.08), transparent 30%),
    linear-gradient(180deg, #fcfefe 0%, var(--page-bg) 100%);
  color: var(--text);
  font-family: Georgia, "Times New Roman", Times, serif;
  line-height: 1.72;
  text-rendering: optimizeLegibility;
}

a {
  color: var(--primary);
  text-decoration: none;
  transition: color 160ms ease, border-color 160ms ease, background-color 160ms ease;
}

a:hover {
  color: var(--primary-soft);
}

.page-shell {
  padding: 40px 20px 56px;
}

.profile-card {
  max-width: var(--content-width);
  margin: 0 auto;
  padding: 28px 36px 36px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--card-radius);
  box-shadow: var(--shadow);
}

.hero {
  display: grid;
  grid-template-columns: 210px minmax(0, 1fr);
  gap: 34px;
  align-items: start;
  padding: 2px 0 24px;
}

.portrait-wrap {
  padding-top: 8px;
}

.portrait {
  display: block;
  width: 210px;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: #f8fafc;
  box-shadow: 0 10px 24px rgba(15, 23, 42, 0.06);
}

.hero-copy h1 {
  margin: 0 0 10px;
  color: var(--primary);
  font-size: clamp(2.15rem, 4vw, 2.85rem);
  line-height: 1.08;
  letter-spacing: -0.03em;
}

.hero-copy h1 span {
  font-size: 0.7em;
  color: inherit;
}

.position-line,
.sub-affiliation,
.contact-line,
.section-nav,
.quick-links {
  margin: 0 0 14px;
}

.position-line {
  color: var(--muted);
  font-size: 0.88rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.affiliation-list {
  display: grid;
  gap: 0;
  margin: 0 0 16px;
}

.affiliation-item {
  padding: 10px 0;
}

.affiliation-item + .affiliation-item {
  margin-top: 6px;
  padding-top: 16px;
}

.affiliation {
  margin: 0;
  position: relative;
  padding-left: 18px;
  font-size: 1.0rem;
  font-weight: 500;
  line-height: 1.65;
}

.affiliation::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.18em;
  bottom: 0.18em;
  width: 4px;
  background: var(--primary);
  border-radius: 999px;
}

.affiliation-name {
  font-weight: 400;
}

.affiliation-zh {
  display: block;
  margin-top: 6px;
  color: var(--muted);
  font-size: 0.98rem;
  font-weight: 500;
  letter-spacing: 0.02em;
}

.sub-affiliation {
  color: var(--muted);
  font-size: 1rem;
}

.section-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 0;
  padding: 10px 0 2px;
  border-top: 1px solid var(--border);
  font-size: 0.84rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.section-nav a + a::before {
  content: "|";
  color: #94a3b8;
  margin: 0 8px;
}

.contact-line {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 16px;
  align-items: center;
  font-size: 0.98rem;
}

.contact-line span {
  font-weight: 700;
  color: var(--secondary);
}

.quick-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
}

.quick-links a {
  display: inline-flex;
  align-items: center;
  justify-content: flex-start;
  gap: 8px;
  min-height: 36px;
  padding: 0 12px;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: rgba(248, 250, 252, 0.75);
  color: var(--secondary);
  font-family: Georgia, "Times New Roman", Times, serif;
  font-size: 0.88rem;
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.01em;
  text-transform: none;
  transition:
    background-color 0.18s ease,
    border-color 0.18s ease,
    color 0.18s ease;
}

.quick-links svg {
  width: 15px;
  height: 15px;
  flex: 0 0 15px;
  display: block;
  fill: currentColor;
}

.quick-links span {
  line-height: 1;
  display: inline-block;
  transform: translateY(0.5px);
}

.quick-links a:hover {
  background: rgba(20, 184, 166, 0.08);
  border-color: var(--accent);
  color: var(--primary-soft);
}

.content-section {
  padding-top: 14px;
}

.content-section + .content-section {
  margin-top: 4px;
}

.content-section h2 {
  margin: 18px 0 14px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
  color: var(--primary);
  font-size: 1.02rem;
  line-height: 1.2;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.content-section p,
.content-section li {
  font-size: 1rem;
}

.interest-accent {
  color: var(--primary);
  font-weight: 700;
}

.content-section ul,
.content-section ol {
  margin: 12px 0 0 20px;
  padding: 0;
}

.timeline-list {
  list-style: square;
}

.timeline-list li {
  display: grid;
  grid-template-columns: 132px minmax(0, 1fr);
  gap: 12px;
  margin-bottom: 12px;
}

.item-meta {
  color: var(--secondary);
  font-weight: 700;
  white-space: nowrap;
}

.publication-list {
  list-style: none;
  margin: 12px 0 0;
  padding: 0;
}

.publication-card {
  position: relative;
  display: grid;
  grid-template-columns: 300px minmax(0, 1fr);
  gap: 20px;
  align-items: center;
  padding: 10px 0 10px 18px;
}

.publication-card + .publication-card {
  margin-top: 20px;
}

.publication-card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 18px;
  bottom: 18px;
  width: 4px;
  background: var(--primary);
  border-radius: 999px;
}

.publication-figure {
  display: grid;
  place-items: center;
  aspect-ratio: 16 / 10;
  background: transparent;
  color: var(--primary-soft);
  font-size: 0.88rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.publication-figure img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  object-position: center;
  display: block;
}

.publication-body h3 {
  margin: 0 0 6px;
  color: var(--secondary);
  font-size: 1.1rem;
  line-height: 1.35;
}

.publication-body {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.publication-authors,
.publication-venue,
.publication-meta {
  margin: 0 0 8px;
}

.publication-authors {
  color: var(--text);
}

.publication-venue {
  color: var(--muted);
}

.publication-meta {
  margin-bottom: 0;
}

.highlight-video-section {
  display: grid;
  justify-items: center;
}

.highlight-video-section h2 {
  width: 100%;
}

.highlight-video-section > p {
  width: 100%;
  margin: 0 0 8px;
  justify-self: stretch;
}

.video-switcher {
  display: inline-flex;
  width: auto;
  max-width: 100%;
  margin: 10px auto 0;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: #f8fafc;
  overflow: hidden;
}

.video-card {
  appearance: none;
  min-width: 180px;
  padding: 11px 28px;
  border: 0;
  background: transparent;
  color: var(--muted);
  font-family: Georgia, "Times New Roman", Times, serif;
  font-size: 0.96rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  text-align: center;
  cursor: pointer;
  transition:
    background 120ms ease,
    color 120ms ease;
}

.video-card + .video-card {
  border-left: 1px solid rgba(226, 232, 240, 0.9);
}

.video-card:hover {
  background: rgba(15, 118, 110, 0.05);
  color: var(--secondary);
}

.video-card.is-active {
  background: rgba(15, 118, 110, 0.1);
  color: var(--primary-soft);
}

.video-embed {
  position: relative;
  width: min(100%, 980px);
  margin: 18px auto 0;
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #000;
  aspect-ratio: 16 / 9;
}

.video-embed iframe {
  width: 100%;
  height: 100%;
  border: 0;
}

.link-group {
  display: inline-flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 0.88rem;
}

.link-group a {
  display: inline-flex;
  align-items: center;
  color: var(--primary);
}

.link-group a + a {
  margin-left: 2px;
}

.link-group a + a::before {
  content: "|";
  margin-right: 10px;
  color: #94a3b8;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin-top: 10px;
}

.mini-card {
  padding: 16px 16px 14px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: linear-gradient(180deg, #fcfefe 0%, #f8fafc 100%);
}

.mini-card h3 {
  margin: 0 0 8px;
  color: var(--primary);
  font-size: 1.04rem;
}

.mini-card p {
  margin: 0 0 8px;
}

.highlight-line {
  margin-top: 14px;
  font-size: 1.05rem;
  font-weight: 700;
}

.page-footer {
  margin-top: 28px;
  padding-top: 10px;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.95rem;
}

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

@media (max-width: 820px) {
  .profile-card {
    padding: 20px 18px 26px;
  }

  .hero {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .portrait-wrap {
    padding-top: 0;
  }

  .portrait {
    width: min(220px, 100%);
  }

  .timeline-list li {
    grid-template-columns: 1fr;
    gap: 2px;
  }

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

  .publication-card {
    grid-template-columns: 1fr;
    gap: 14px;
  }

  .video-switcher {
    display: flex;
    width: 100%;
  }
}

@media (max-width: 560px) {
  .page-shell {
    padding: 20px 12px 32px;
  }

  .profile-card {
    border-radius: 12px;
  }

  .hero-copy h1 {
    font-size: 1.9rem;
  }

  .position-line,
  .content-section h2,
  .section-nav {
    letter-spacing: 0.08em;
  }

  .affiliation {
    font-size: 1.03rem;
  }

  .affiliation-zh {
    font-size: 0.94rem;
  }

  .affiliation-item {
    padding: 10px 0;
  }

  .section-nav a + a::before {
    margin: 0 6px;
  }

  .quick-links {
    gap: 8px;
  }

  .quick-links a {
    min-height: 34px;
    padding: 0 10px;
  }
}