/* ============ Base ============ */
:root {
  --accent: #1a5fb4;
  --accent-dark: #12457e;
  --text: #24292f;
  --muted: #6e7781;
  --border: #d0d7de;
  --sidebar-bg: #f6f8fa;
  --card-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: 72px;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans",
    Roboto, Helvetica, Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background: #fff;
  line-height: 1.65;
}

a { color: var(--accent); }
a:hover { color: var(--accent-dark); }

.wrap {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 24px;
}

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

/* ============ Header ============ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 56px;
}

.site-title {
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--text);
  text-decoration: none;
}
.site-title:hover { color: var(--accent); }

.site-header nav a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.95rem;
  margin-left: 18px;
}
.site-header nav a:hover { color: var(--accent); }

/* ============ Page layout ============ */
.page {
  display: grid;
  grid-template-columns: 300px minmax(0, 1fr);
  gap: 36px;
  padding: 36px 24px 56px;
}

/* ============ Sidebar ============ */
.sidebar .card {
  background: var(--sidebar-bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 28px 24px;
}

.photo {
  width: 180px;
  height: 180px;
  object-fit: cover;
  border-radius: 50%;
  display: block;
  margin: 0 auto 16px;
  border: 4px solid #fff;
  box-shadow: var(--card-shadow);
}

.sidebar-name {
  text-align: center;
  margin: 0 0 4px;
  font-size: 1.3rem;
}

.sidebar-bio {
  text-align: center;
  color: var(--muted);
  margin: 0 0 16px;
  font-size: 0.92rem;
}

.sidebar-heading {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
  border-bottom: 1px solid var(--border);
  padding-bottom: 6px;
  margin: 22px 0 10px;
}

.sidebar-list {
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: 0.92rem;
}
.sidebar-list li { margin: 6px 0; }

.sidebar-links {
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: 0.95rem;
}
.sidebar-links li {
  margin: 8px 0;
  display: flex;
  align-items: center;
  gap: 8px;
}
.sidebar-links svg { flex: none; color: var(--muted); }
.sidebar-links a { text-decoration: none; }
.sidebar-links a:hover { text-decoration: underline; }

/* ============ Content ============ */
.content h1 {
  font-size: 1.5rem;
  border-bottom: 2px solid var(--border);
  padding-bottom: 8px;
  margin: 8px 0 18px;
}

section { margin-bottom: 40px; }

.edu-list,
.news-list,
.awards-list { padding-left: 20px; }
.edu-list li,
.news-list li,
.awards-list li { margin: 8px 0; }

.news-date { font-weight: 600; }

/* ---- Publications ---- */
.pub {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 18px 20px;
  margin: 14px 0;
  background: #fff;
  box-shadow: var(--card-shadow);
}

.pub-badge {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: 999px;
  margin-bottom: 10px;
}

.pub-thumb {
  max-width: 100%;
  border-radius: 6px;
  margin: 8px 0;
}

.pub-title { margin: 6px 0 4px; }
.pub-authors { margin: 4px 0; }
.pub-links { margin: 4px 0; font-size: 0.92rem; }
.pub-tags { color: var(--muted); font-size: 0.88rem; margin: 4px 0 0; }

/* ============ Footer ============ */
.site-footer {
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.9rem;
  padding: 18px 0;
  text-align: center;
}
.site-footer a { color: var(--muted); }
.site-footer a:hover { color: var(--accent); }

/* ============ Responsive ============ */
@media (max-width: 900px) {
  .page {
    grid-template-columns: 1fr;
    gap: 24px;
    padding-top: 24px;
  }

  .sidebar {
    width: 100%;
    max-width: 480px;
    margin: 0 auto;
  }

  .nav-wrap {
    flex-direction: column;
    height: auto;
    gap: 6px;
    padding: 10px 24px;
  }

  .site-header nav a { margin: 0 10px; }
}