:root {
  --bg: #f6f8fa;
  --card: #ffffff;
  --text: #1c2733;
  --muted: #5c6b7a;
  --accent: #1a4f8a;
  --accent-soft: #eaf1f9;
  --border: #e2e8ee;
  --shadow: 0 1px 2px rgba(16, 24, 40, .04), 0 8px 24px rgba(16, 24, 40, .06);
  --maxw: 960px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.topnav {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(255, 255, 255, .88);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 12px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.nav-brand { font-weight: 700; color: var(--text); letter-spacing: .02em; }

.nav-links { display: flex; flex-wrap: wrap; gap: 16px; }
.nav-links a { color: var(--muted); font-size: 14px; }
.nav-links a:hover { color: var(--accent); text-decoration: none; }

.hero {
  background: linear-gradient(180deg, #ffffff 0%, #f2f6fb 100%);
  border-bottom: 1px solid var(--border);
}

.hero-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 56px 24px 52px;
  display: flex;
  align-items: center;
  gap: 48px;
}

.hero-text { flex: 1 1 auto; }
.hero-photo { flex: 0 0 auto; }

.hero-photo img {
  width: 172px;
  height: 172px;
  object-fit: cover;
  border-radius: 50%;
  border: 4px solid #fff;
  box-shadow: var(--shadow);
  background: #fff;
}

.hero h1 { margin: 0; font-size: 34px; letter-spacing: .02em; }
.en-name { margin: 2px 0 12px; color: var(--muted); font-size: 17px; letter-spacing: .06em; }
.role { margin: 0 0 2px; font-weight: 600; color: var(--accent); }
.affil { margin: 0; font-size: 15px; }
.affil-en { margin: 2px 0 14px; color: var(--muted); font-size: 13.5px; }
.tagline {
  display: inline-block;
  margin: 0 0 20px;
  padding: 6px 14px;
  background: var(--accent-soft);
  border-radius: 999px;
  color: var(--accent);
  font-size: 14px;
}

.hero-links { display: flex; flex-wrap: wrap; gap: 10px; }
.btn {
  display: inline-block;
  padding: 8px 18px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: #fff;
  color: var(--accent);
  font-size: 14px;
  box-shadow: 0 1px 2px rgba(16, 24, 40, .04);
  transition: all .18s ease;
}
.btn:hover {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
  text-decoration: none;
  transform: translateY(-1px);
}

main { max-width: var(--maxw); margin: 0 auto; padding: 8px 24px 24px; }

section { padding: 40px 0 8px; }

section h2 {
  position: relative;
  margin: 0 0 22px;
  padding-left: 14px;
  font-size: 22px;
  letter-spacing: .02em;
}
section h2::before {
  content: "";
  position: absolute;
  left: 0;
  top: .28em;
  width: 4px;
  height: 1.05em;
  border-radius: 2px;
  background: var(--accent);
}

section p { margin: 0 0 14px; }

.news-list { list-style: none; margin: 0; padding: 0; }
.news-list li {
  display: flex;
  gap: 18px;
  padding: 10px 0;
  border-bottom: 1px dashed var(--border);
}
.news-list li:last-child { border-bottom: none; }
.news-date {
  flex: 0 0 74px;
  color: var(--accent);
  font-weight: 600;
  font-size: 14px;
  font-variant-numeric: tabular-nums;
}
.news-list span:last-child { font-size: 15px; }

.timeline { list-style: none; margin: 0; padding: 0; }
.timeline li {
  position: relative;
  padding: 0 0 22px 22px;
  border-left: 2px solid var(--border);
}
.timeline li:last-child { border-left-color: transparent; padding-bottom: 0; }
.timeline li::before {
  content: "";
  position: absolute;
  left: -7px;
  top: 8px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: #fff;
  border: 2px solid var(--accent);
}
.timeline .when { display: block; color: var(--muted); font-size: 13.5px; font-variant-numeric: tabular-nums; }
.timeline .what { display: block; margin: 2px 0; }
.timeline .detail { display: block; color: var(--muted); font-size: 14.5px; }

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 18px;
}
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 18px 20px;
  box-shadow: var(--shadow);
}
.card h3 { margin: 0 0 8px; font-size: 16.5px; color: var(--accent); }
.card p { margin: 0; color: var(--muted); font-size: 14.5px; }

.pub {
  display: flex;
  align-items: center;
  gap: 24px;
  padding: 18px;
  margin-bottom: 18px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  box-shadow: var(--shadow);
}
.pub-thumb { flex: 0 0 268px; display: block; }
.pub-thumb img {
  display: block;
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 9px;
  background: #fff;
}
.pub-thumb--empty {
  flex: 0 0 268px;
  height: 150px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px dashed var(--border);
  border-radius: 9px;
  color: var(--muted);
  font-size: 13.5px;
  letter-spacing: .08em;
  background: #fbfcfe;
}
.pub-body { flex: 1 1 auto; min-width: 0; }
.pub h3 { margin: 0 0 7px; font-size: 16.5px; line-height: 1.45; }
.pub h3 a { color: var(--text); }
.pub h3 a:hover { color: var(--accent); text-decoration: none; }
.pub .authors { margin: 0 0 4px; font-size: 14px; color: var(--muted); }
.pub .venue { margin: 0 0 10px; font-size: 14px; color: var(--accent); }
.pub-links { margin: 0; }
.pub-links a {
  display: inline-block;
  margin: 0 8px 0 0;
  padding: 2px 12px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: #fff;
  font-size: 13px;
}
.pub-links a:hover { background: var(--accent); color: #fff; border-color: var(--accent); text-decoration: none; }

.plain-list { list-style: none; margin: 0; padding: 0; }
.plain-list li {
  position: relative;
  margin-bottom: 12px;
  padding-left: 20px;
}
.plain-list li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: .62em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
}
.plain-list .num {
  display: inline-block;
  margin-left: 6px;
  padding: 1px 9px;
  border-radius: 6px;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 12.5px;
  white-space: nowrap;
}

.project {
  background: var(--card);
  border: 1px solid var(--border);
  border-left: 4px solid var(--accent);
  border-radius: 10px;
  padding: 18px 22px;
  margin-bottom: 18px;
  box-shadow: var(--shadow);
}
.project-head { display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between; gap: 8px; }
.project-head h3 { margin: 0; font-size: 17px; }
.project .period { color: var(--muted); font-size: 13.5px; font-variant-numeric: tabular-nums; }
.project .meta { margin: 4px 0 8px; color: var(--accent); font-size: 14px; }
.project p:last-child { margin-bottom: 0; }

footer {
  margin-top: 40px;
  padding: 28px 24px 36px;
  text-align: center;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 14px;
}
footer p { margin: 4px 0; }

@media (max-width: 760px) {
  .nav-inner { flex-direction: column; align-items: flex-start; gap: 8px; }
  .nav-links { gap: 12px; }
  .hero-inner { flex-direction: column-reverse; align-items: flex-start; gap: 28px; padding-top: 36px; }
  .hero h1 { font-size: 28px; }
  .hero-photo img { width: 132px; height: 132px; }
  main { padding-left: 18px; padding-right: 18px; }
  .pub { flex-direction: column; align-items: stretch; gap: 14px; }
  .pub-thumb, .pub-thumb--empty { flex: 0 0 auto; width: 100%; }
  .news-list li { gap: 12px; }
  .news-date { flex: 0 0 62px; }
}