:root {
  --bg: #fbfbfc;
  --panel: #ffffff;
  --ink: #17181b;
  --muted: #5b5f68;
  --line: #e3e5ea;
  --soft: #f4f6f8;
  --accent: #123d72;
  --shadow: 0 14px 34px rgba(17, 24, 39, 0.05);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: "Helvetica Neue", "Segoe UI", "PingFang SC", "Hiragino Sans GB",
    "Noto Sans CJK SC", sans-serif;
  line-height: 1.65;
}

img {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
  text-decoration: none;
}

h1,
h2,
h3,
p,
ul {
  margin-top: 0;
}

h1,
h2,
h3 {
  font-family: Georgia, "Times New Roman", "Songti SC", serif;
  font-weight: 600;
}

.site-shell {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 30px 0 18px;
  border-bottom: 1px solid var(--line);
}

.brand {
  font-size: 1.18rem;
  font-weight: 700;
  letter-spacing: 0.01em;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 22px;
  color: var(--muted);
  font-size: 0.96rem;
}

.site-nav a:hover,
.brand:hover,
.link-row a:hover,
.paper-links a:hover,
.inline-link:hover,
.site-footer a:hover {
  color: var(--accent);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 270px;
  gap: 52px;
  align-items: start;
  padding: 48px 0 36px;
}

.eyebrow {
  margin-bottom: 10px;
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.hero h1 {
  margin-bottom: 12px;
  font-size: clamp(2.8rem, 5vw, 4rem);
  line-height: 1.04;
}

.hero-subtitle {
  margin-bottom: 16px;
  color: var(--accent);
  font-size: 1.12rem;
  font-weight: 600;
}

.hero-text,
.research-text,
.citation,
.info-card p,
.award-list {
  color: var(--muted);
}

.hero-text {
  max-width: 720px;
  margin-bottom: 22px;
  font-size: 1.02rem;
}

.link-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.link-row a,
.paper-links a {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 0 13px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--panel);
  font-size: 0.92rem;
  transition:
    border-color 160ms ease,
    color 160ms ease,
    transform 160ms ease,
    box-shadow 160ms ease;
}

.link-row a:hover,
.paper-links a:hover {
  transform: translateY(-1px);
  box-shadow: 0 8px 18px rgba(18, 61, 114, 0.08);
}

.portrait-card {
  width: 270px;
  height: 340px;
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--panel);
  border-radius: 14px;
  box-shadow: var(--shadow);
}

.portrait-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 25%;
}

.section-grid {
  display: grid;
  grid-template-columns: 170px minmax(0, 1fr);
  gap: 30px;
  padding: 28px 0;
  border-top: 1px solid var(--line);
}

.section-label p {
  margin: 0;
  color: var(--ink);
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.section-content {
  display: grid;
  gap: 18px;
}

.research-text {
  margin-bottom: 0;
}

.info-card {
  padding: 22px 24px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--panel);
  box-shadow: var(--shadow);
}

.timeline-item {
  display: grid;
  grid-template-columns: 160px minmax(0, 1fr);
  gap: 20px;
  align-items: start;
}

.timeline-item + .timeline-item {
  margin-top: 20px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
}

.institution-entry {
  display: grid;
  grid-template-columns: 54px minmax(0, 1fr);
  gap: 14px;
  align-items: start;
}

.institution-logo {
  width: 54px;
  height: 54px;
  padding: 5px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #ffffff;
  object-fit: contain;
}

.timeline-date,
.paper-meta span {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  padding: 0 10px;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: var(--soft);
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--muted);
}

.info-card h2 {
  margin-bottom: 8px;
  font-size: 1.2rem;
}

.inline-link {
  color: var(--accent);
}

.dual-stack {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
}

.service-list {
  display: grid;
  gap: 8px;
}

.service-item {
  grid-template-columns: 160px minmax(0, 1fr);
}

.service-role {
  color: var(--ink);
  font-weight: 600;
}

.award-list {
  margin-bottom: 0;
  padding-left: 18px;
}

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

.paper-item {
  display: grid;
  grid-template-columns: 260px minmax(0, 1fr);
  gap: 24px;
  align-items: stretch;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--panel);
  box-shadow: var(--shadow);
}

.paper-item:last-child {
  padding-bottom: 18px;
}

.paper-thumb {
  display: grid;
  place-items: center;
  width: 260px;
  height: 156px;
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--soft);
  border-radius: 10px;
}

.paper-thumb img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  object-position: center;
}

.pearl-thumb img {
  object-fit: cover;
  object-position: center 58%;
}

.paper-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 10px;
}

.paper-copy h2 {
  margin-bottom: 8px;
  font-size: 1.24rem;
  line-height: 1.28;
}

.citation {
  margin-bottom: 0;
}

.paper-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 12px;
}

.site-footer {
  display: flex;
  justify-content: flex-end;
  gap: 18px;
  padding: 24px 0 42px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.94rem;
}

@media (max-width: 920px) {
  .hero,
  .section-grid,
  .paper-item,
  .dual-stack,
  .timeline-item,
  .service-item {
    grid-template-columns: 1fr;
  }

  .portrait-card,
  .paper-thumb {
    width: 100%;
  }

  .institution-entry {
    grid-template-columns: 48px minmax(0, 1fr);
  }

  .institution-logo {
    width: 48px;
    height: 48px;
  }

  .paper-item:last-child {
    padding-bottom: 18px;
  }

  .paper-thumb {
    height: 190px;
  }
}

@media (max-width: 640px) {
  .site-shell {
    width: min(100% - 24px, 1080px);
  }

  .site-header,
  .site-footer {
    flex-direction: column;
    align-items: flex-start;
  }

  .hero {
    gap: 24px;
    padding-top: 28px;
  }

  .portrait-card {
    height: 300px;
  }

  .paper-thumb {
    height: 170px;
  }
}