:root {
  --text: #494e52;
  --text-dark: #313538;
  --link: #224b8d;
  --link-hover: #1a3a6e;
  --border: #f0f0f0;
  --gradient-start: #667eea;
  --gradient-end: #764ba2;
  --focus-bg-start: #f8f9ff;
  --focus-bg-end: #e8f0fe;
  --focus-border: #4285f4;
  --sidebar-width: 260px;
  --content-max: 760px;
  --nav-height: 3.25rem;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-height) + 1rem);
}

body {
  margin: 0;
  font-family: "Trebuchet MS", Helvetica, Arial, sans-serif;
  font-size: 15px;
  line-height: 1.65;
  color: var(--text);
  background: #fff;
}

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

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

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 200;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 1px 8px rgba(0, 0, 0, 0.04);
}

.top-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 1.5rem;
  min-height: var(--nav-height);
}

.nav-brand {
  font-weight: 700;
  font-size: 1rem;
  color: var(--link);
  text-decoration: none;
  white-space: nowrap;
}

.nav-brand:hover {
  color: var(--link-hover);
  text-decoration: none;
}

.nav-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 0.15rem 1.25rem;
  list-style: none;
  margin: 0;
  padding: 0.5rem 0;
}

.nav-links a {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text);
  text-decoration: none;
  transition: color 0.15s;
}

.nav-links a:hover {
  color: var(--link);
  text-decoration: none;
}

.page-wrapper {
  display: flex;
  gap: 2.5rem;
  max-width: 1100px;
  margin: 0 auto;
  padding: 2.5rem 1.5rem 3rem;
  align-items: flex-start;
}

.sidebar {
  flex: 0 0 var(--sidebar-width);
  position: sticky;
  top: calc(var(--nav-height) + 1.25rem);
}

.author-profile {
  text-align: center;
}

.author-avatar {
  width: 180px;
  height: 180px;
  object-fit: cover;
  border-radius: 50%;
  margin: 0 auto 1rem;
  border: 4px solid #fff;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
  transition: transform 0.3s ease;
}

.author-avatar:hover {
  transform: scale(1.03);
}

.author-name {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-dark);
  margin: 0 0 0.35rem;
  line-height: 1.2;
}

.author-role {
  margin: 0 0 0.5rem;
  font-weight: 600;
  color: var(--text);
}

.author-affiliation {
  margin: 0 0 0.6rem;
  font-size: 0.875rem;
  line-height: 1.5;
}

.author-location {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  margin: 0 0 1.1rem;
  font-size: 0.875rem;
  color: var(--text);
}

.author-location .profile-icon {
  width: 0.95rem;
  height: 0.95rem;
  opacity: 0.85;
}

.profile-links {
  list-style: none;
  margin: 0 auto;
  padding: 0;
  width: fit-content;
  max-width: 100%;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  text-align: left;
  gap: 0.4rem;
}

.profile-links li {
  margin: 0;
}

.profile-link {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--link);
  text-decoration: none;
}

.profile-link:hover {
  color: var(--link-hover);
  text-decoration: underline;
}

.profile-icon {
  width: 1rem;
  height: 1rem;
  flex-shrink: 0;
  opacity: 0.9;
}

.main-content {
  flex: 1;
  min-width: 0;
  max-width: var(--content-max);
}

.section {
  margin-bottom: 0.5rem;
}

.section-title {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 1.75rem;
  font-weight: 700;
  margin: 0 0 1rem;
  padding-bottom: 0.45rem;
  border-bottom: 2px solid var(--border);
  color: var(--link);
}

.section-icon {
  width: 1.5rem;
  height: 1.5rem;
  flex-shrink: 0;
  stroke: var(--link);
  fill: none;
}

.section p {
  margin: 0 0 1rem;
}

.recruitment-note {
  background: linear-gradient(45deg, #fff8e1, #fffde7);
  border-left: 4px solid #ffc107;
  border-radius: 8px;
  padding: 0.85rem 1rem;
  margin-top: 0.5rem;
}

.section-divider {
  border: none;
  border-top: 1px solid #e8e8e8;
  margin: 2rem 0;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
}

.card {
  background: linear-gradient(45deg, var(--focus-bg-start), var(--focus-bg-end));
  border-radius: 10px;
  padding: 1.1rem 1.25rem;
  border-left: 4px solid var(--focus-border);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.06);
}

.card h3 {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--link);
  margin: 0 0 0.4rem;
}

.card-icon {
  width: 1rem;
  height: 1rem;
  flex-shrink: 0;
  stroke: var(--link);
  fill: none;
}

.card p {
  margin: 0;
  font-size: 0.875rem;
  line-height: 1.5;
  color: var(--text);
}

.news-bullets {
  margin: 0;
  padding-left: 1.25rem;
}

.news-bullets li {
  margin-bottom: 0.45rem;
  line-height: 1.45;
}

.pub-category,
.resume-category {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-dark);
  margin: 1.75rem 0 0.75rem;
}

.pub-category:first-of-type {
  margin-top: 0.25rem;
}

.pub-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.pub-item {
  position: relative;
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  background: #fff;
  border-radius: 12px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.07);
  border: 1px solid #f0f0f0;
  padding: 0.7rem 1rem;
  margin-bottom: 0.5rem;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.pub-thumb-wrap {
  flex: 0 0 220px;
  width: 220px;
  height: 160px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #f5f6f8;
  border: 1px solid #e9ebef;
  border-radius: 6px;
  overflow: hidden;
  flex-shrink: 0;
}

.pub-thumb {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.pub-item:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 28px rgba(0, 0, 0, 0.1);
}

.pub-body {
  flex: 1;
  min-width: 0;
}

.pub-year {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  color: #fff;
  background: linear-gradient(45deg, var(--gradient-start), var(--gradient-end));
  border-radius: 20px;
  padding: 0.15rem 0.5rem;
  letter-spacing: 0.03em;
  margin-bottom: 0.25rem;
}

.pub-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-dark);
  margin: 0 0 0.2rem;
  line-height: 1.35;
}

.pub-authors,
.pub-venue {
  margin: 0;
  font-size: 0.875rem;
  color: var(--text);
  line-height: 1.4;
}

.pub-authors + .pub-venue {
  margin-top: 0.1rem;
}

.pub-links {
  margin: 0.3rem 0 0;
  font-size: 0.85rem;
}

.pub-links a {
  display: inline-block;
  margin-right: 0.75rem;
  font-weight: 600;
}

.timeline {
  display: grid;
  gap: 0.75rem;
}

.timeline-item {
  background: #fafafa;
  border-radius: 8px;
  padding: 0.85rem 1rem;
  border-left: 3px solid var(--focus-border);
}

.timeline-meta {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--link);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 0.25rem;
}

.timeline-title {
  font-size: 0.95rem;
  font-weight: 700;
  margin: 0 0 0.15rem;
  color: var(--text-dark);
}

.timeline-org,
.timeline-desc {
  margin: 0;
  font-size: 0.9rem;
  color: var(--text);
}

.timeline-desc {
  margin-top: 0.25rem;
}

.service-block {
  background: linear-gradient(45deg, #e8f5e8, #f1f8e9);
  border-radius: 8px;
  padding: 1rem 1.15rem;
  border-left: 4px solid #4caf50;
}

.service-block p {
  margin: 0 0 0.5rem;
  font-size: 0.9rem;
}

.service-block p:last-child {
  margin-bottom: 0;
}

.motto {
  max-width: 36rem;
  margin: 0;
  padding: 0;
  border: none;
  text-align: center;
}

.motto p {
  font-style: italic;
  margin: 0 0 0.45rem;
  color: var(--text);
}

.motto footer {
  margin-top: 0.75rem;
  font-size: 0.875rem;
  color: var(--text);
}

.contact-block p {
  margin: 0 0 0.65rem;
}

.connect-note {
  margin-top: 1rem;
  padding: 0.85rem 1rem;
  background: #f8f9fa;
  border-radius: 8px;
}

.site-footer {
  text-align: center;
  padding: 1.5rem;
  font-size: 0.8125rem;
  color: #888;
  border-top: 1px solid var(--border);
}

@media (max-width: 860px) {
  .top-nav {
    flex-direction: column;
    align-items: stretch;
    padding: 0.65rem 1rem;
    min-height: auto;
  }

  .nav-brand {
    text-align: center;
    padding-bottom: 0.35rem;
  }

  .nav-links {
    justify-content: center;
    gap: 0.35rem 0.85rem;
    padding: 0;
  }

  .page-wrapper {
    flex-direction: column;
    padding-top: 1.5rem;
  }

  .sidebar {
    position: static;
    flex: none;
    width: 100%;
  }

  .author-profile {
    display: grid;
    grid-template-columns: 100px 1fr;
    grid-template-areas:
      "avatar name"
      "avatar role"
      "avatar affiliation"
      "links links";
    gap: 0.25rem 1.25rem;
    text-align: left;
    align-items: center;
  }

  .author-avatar {
    grid-area: avatar;
    width: 100px;
    height: 100px;
    margin: 0;
  }

  .author-name {
    grid-area: name;
    font-size: 1.35rem;
  }

  .author-role {
    grid-area: role;
    margin: 0;
  }

  .author-affiliation {
    grid-area: affiliation;
    margin: 0;
  }

  .profile-links {
    grid-area: links;
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: center;
    margin: 0.5rem auto 0;
    gap: 0.5rem 1rem;
  }

  .main-content {
    max-width: none;
  }

  .pub-item {
    flex-direction: column;
    align-items: stretch;
  }

  .pub-thumb-wrap {
    width: 100%;
    height: 180px;
    flex: none;
  }
}