:root {
  --bg: #fff;
  --text: #2b2b2b;
  --muted: #6d6d6d;
  --line: #e5e5e5;
  --accent: #2d6fa3;
  --accent-dark: #1d4f78;
  --soft: #f5f8fb;
  --paper: #fff;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

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

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

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

.masthead {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(255, 255, 255, 0.96);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(8px);
}

.nav {
  max-width: 1180px;
  margin: 0 auto;
  padding: 12px 24px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px 22px;
}

.nav a {
  color: #333;
  font-size: 0.95rem;
  font-weight: 600;
}

.nav-brand {
  margin-right: auto;
  font-size: 1.05rem !important;
}

#main {
  max-width: 1180px;
  margin: 0 auto;
  padding: 32px 24px 64px;
  display: grid;
  grid-template-columns: 285px minmax(0, 1fr);
  gap: 36px;
}

.sidebar {
  align-self: start;
  position: sticky;
  top: 82px;
}

.profile-box {
  padding: 22px;
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 6px;
}

.avatar {
  width: 170px;
  height: 170px;
  object-fit: cover;
  border-radius: 50%;
  display: block;
  margin: 0 auto 18px;
}

.profile-box h1 {
  margin: 0;
  font-size: 1.35rem;
  line-height: 1.25;
  text-align: center;
}

.role,
.affiliation {
  margin: 8px 0 0;
  color: var(--muted);
  text-align: center;
}

.profile-links {
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
}

.profile-links li {
  margin: 9px 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.profile-links i {
  width: 20px;
  color: #555;
}

.page {
  min-width: 0;
}

.section {
  padding-top: 12px;
  margin-bottom: 28px;
  scroll-margin-top: 82px;
}

.section h2 {
  margin: 0 0 14px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--line);
  font-size: 1.55rem;
  line-height: 1.25;
}

.section h3 {
  margin: 26px 0 12px;
  font-size: 1.2rem;
  color: #333;
}

.section p {
  margin: 0 0 13px;
}

.section ul {
  margin: 0 0 12px;
  padding-left: 22px;
}

.news-list li {
  margin-bottom: 7px;
}

.note {
  color: var(--muted);
  font-size: 0.95rem;
}

.paper-box {
  display: grid;
  grid-template-columns: 140px minmax(0, 1fr);
  gap: 14px;
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
}

.paper-image {
  position: relative;
  height: 82px;
  background: #fff;
  border: 1px solid #d8e5ee;
  border-radius: 4px;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.paper-image img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.badge {
  position: absolute;
  left: 0;
  top: 0;
  z-index: 1;
  padding: 4px 9px;
  background: var(--accent);
  color: #fff;
  font-size: 0.78rem;
  font-weight: 700;
}

.thumb {
  padding: 18px;
  color: var(--accent-dark);
  font-size: 1.05rem;
  font-weight: 700;
  text-align: center;
}

.paper-info h4 {
  margin: 0 0 8px;
  color: #1e1e1e;
  font-size: 1.08rem;
  line-height: 1.35;
}

.paper-info p {
  margin-bottom: 7px;
}

.links {
  color: var(--muted);
  font-weight: 600;
}

.tag {
  display: inline-block;
  margin-left: 6px;
  padding: 1px 7px;
  border-radius: 99px;
  background: var(--soft);
  color: var(--accent-dark);
  font-size: 0.8rem;
  font-weight: 700;
}

.footer {
  margin-top: 38px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.9rem;
}

@media (max-width: 920px) {
  #main {
    grid-template-columns: 1fr;
  }

  .sidebar {
    position: static;
  }

  .profile-box {
    display: grid;
    grid-template-columns: 130px minmax(0, 1fr);
    gap: 16px;
    align-items: center;
  }

  .avatar {
    width: 130px;
    height: 130px;
    margin: 0;
    grid-row: span 3;
  }

  .profile-box h1,
  .role,
  .affiliation {
    text-align: left;
  }

  .profile-links {
    grid-column: 1 / -1;
  }
}

@media (max-width: 640px) {
  .nav {
    padding: 10px 16px;
    gap: 10px 14px;
  }

  .nav-brand {
    flex-basis: 100%;
  }

  #main {
    padding: 20px 16px 42px;
  }

  .profile-box {
    display: block;
  }

  .avatar {
    margin: 0 auto 16px;
  }

  .profile-box h1,
  .role,
  .affiliation {
    text-align: center;
  }

  .paper-box {
    grid-template-columns: 1fr;
  }

  .paper-image {
    height: 92px;
  }
}