:root {
  --bg-deep: #060b1a;
  --bg-mid: #0d1430;
  --bg-soft: #121f45;
  --card: rgba(10, 19, 47, 0.62);
  --card-strong: rgba(7, 14, 36, 0.82);
  --ink: #e6edff;
  --muted: #9daed8;
  --brand: #52d1ff;
  --brand-2: #59f4c8;
  --line: rgba(130, 178, 255, 0.24);
  --glow: rgba(82, 209, 255, 0.45);
  --network-node: rgba(153, 230, 255, 0.9);
  --network-line: rgba(104, 197, 255, 0.3);
  --network-accent: rgba(89, 244, 200, 0.36);
}

* { box-sizing: border-box; }

html,
body {
  min-height: 100%;
}

body {
  margin: 0;
  font-family: "Rajdhani", "IBM Plex Sans", "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at 15% 20%, rgba(82, 209, 255, 0.22), transparent 36%),
    radial-gradient(circle at 85% 85%, rgba(89, 244, 200, 0.17), transparent 34%),
    linear-gradient(160deg, var(--bg-deep) 0%, var(--bg-mid) 45%, var(--bg-soft) 100%);
  line-height: 1.65;
  position: relative;
  overflow-x: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(95, 167, 255, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(95, 167, 255, 0.06) 1px, transparent 1px);
  background-size: 28px 28px;
  pointer-events: none;
  z-index: -1;
}

.container {
  width: min(1260px, 94%);
  margin: 0 auto;
  position: relative;
}

.site-header {
  border-bottom: 1px solid var(--line);
  background: rgba(6, 13, 35, 0.72);
  backdrop-filter: blur(10px);
  position: sticky;
  top: 0;
  z-index: 30;
  box-shadow: 0 8px 24px rgba(0, 6, 20, 0.35);
}

.site-header h1 {
  margin: 14px 0 2px;
  font-size: 2rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.tagline {
  margin: 0 0 12px;
  color: var(--muted);
  letter-spacing: 0.04em;
  font-family: "FZZhangcao", "FZZHANGCAO", "STXingkai", "Xingkai SC", "FZShuTi", "STKaiti", "KaiTi", cursive;
  font-size: 1.08rem;
}

nav {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  padding-bottom: 10px;
  padding-right: 390px;
}

nav a {
  text-decoration: none;
  color: var(--ink);
  border: 1px solid var(--line);
  padding: 6px 14px;
  border-radius: 999px;
  font-size: 0.94rem;
  background: rgba(16, 30, 72, 0.35);
  transition: all 180ms ease;
}

nav a.active,
nav a:hover {
  color: #031022;
  background: linear-gradient(120deg, var(--brand), var(--brand-2));
  border-color: transparent;
  box-shadow: 0 0 18px var(--glow);
}

.lang-corner {
  position: absolute;
  right: 0;
  top: 14px;
  display: inline-flex;
  gap: 8px;
  align-items: center;
}

.lang-label {
  font-size: 0.82rem;
  color: var(--muted);
}

.lang-select {
  border: 1px solid var(--line);
  background: rgba(11, 20, 48, 0.82);
  color: var(--ink);
  border-radius: 999px;
  padding: 4px 10px;
  font-size: 0.84rem;
  outline: none;
}

.lang-select:focus {
  box-shadow: 0 0 0 2px rgba(82, 209, 255, 0.25);
}

.site-search {
  display: inline-flex;
  gap: 6px;
  align-items: center;
}

.site-search input {
  width: 170px;
  border: 1px solid var(--line);
  background: rgba(11, 20, 48, 0.82);
  color: var(--ink);
  border-radius: 999px;
  padding: 5px 11px;
  font-size: 0.84rem;
  outline: none;
}

.site-search input:focus {
  box-shadow: 0 0 0 2px rgba(82, 209, 255, 0.25);
}

.site-search-btn {
  border: 1px solid var(--line);
  background: linear-gradient(120deg, var(--brand), var(--brand-2));
  color: #041024;
  border-radius: 999px;
  padding: 5px 12px;
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
}

.search-result-item {
  border: 1px solid var(--line);
  border-radius: 10px;
  background: rgba(7, 15, 38, 0.56);
  padding: 12px 14px;
  margin-bottom: 10px;
}

.search-result-item h3 {
  margin: 0 0 4px;
}

.search-result-item p {
  margin: 0;
  color: var(--muted);
  font-size: 0.92rem;
}

main {
  padding: 30px 0 38px;
}

.page-layout {
  display: grid;
  grid-template-columns: minmax(220px, 260px) minmax(0, 1fr) minmax(220px, 260px);
  gap: 18px;
  align-items: start;
}

.content-column {
  min-width: 0;
}

.sidebar {
  position: sticky;
  top: 128px;
}

.card {
  background: linear-gradient(160deg, var(--card) 0%, var(--card-strong) 100%);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 20px;
  margin-bottom: 18px;
  box-shadow:
    0 14px 30px rgba(1, 9, 28, 0.45),
    inset 0 1px 0 rgba(196, 220, 255, 0.16);
  position: relative;
  overflow: hidden;
}

.card::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(130deg, rgba(112, 204, 255, 0.1), transparent 30%, transparent 60%, rgba(89, 244, 200, 0.08));
  pointer-events: none;
}

.card h2,
.card h3 {
  margin-top: 0;
  letter-spacing: 0.04em;
}

.profile-photo {
  width: 100%;
  max-width: 200px;
  border-radius: 12px;
  display: block;
  margin: 8px auto 10px;
  border: 1px solid rgba(95, 212, 255, 0.35);
  box-shadow: 0 0 20px rgba(82, 209, 255, 0.25);
}

.wordcloud-image {
  width: 100%;
  max-width: 100%;
  display: block;
  border-radius: 12px;
  border: 1px solid rgba(95, 212, 255, 0.35);
  box-shadow: 0 0 20px rgba(82, 209, 255, 0.2);
}

.small-muted {
  margin: 0;
  color: var(--muted);
  font-size: 0.92rem;
}

.contact-list,
.link-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.contact-list li,
.link-list li {
  padding: 8px 0;
  border-bottom: 1px dashed rgba(136, 176, 255, 0.25);
}

.contact-list li:last-child,
.link-list li:last-child {
  border-bottom: 0;
}

.contact-list span {
  display: block;
  font-size: 0.78rem;
  color: var(--muted);
  letter-spacing: 0.05em;
}

.contact-list a,
.link-list a {
  color: #a8ecff;
  text-decoration: none;
  word-break: break-word;
}

.contact-list a:hover,
.link-list a:hover {
  color: var(--brand-2);
  text-decoration: underline;
}

.grid {
  display: grid;
  gap: 16px;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.two-col {
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.btn {
  display: inline-block;
  margin-top: 8px;
  text-decoration: none;
  color: #041024;
  background: linear-gradient(120deg, var(--brand), var(--brand-2));
  padding: 8px 14px;
  border-radius: 8px;
  font-weight: 600;
  letter-spacing: 0.03em;
  transition: transform 150ms ease, box-shadow 150ms ease;
  border: 0;
  cursor: pointer;
}

.btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 0 16px var(--glow);
}

.info-list,
.pub-list {
  margin: 0;
  padding-left: 1.2rem;
}

.pub-filter-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px 14px;
  align-items: start;
}

.pub-filter-item {
  display: grid;
  gap: 6px;
}

.pub-filter-grid label {
  color: var(--muted);
  font-size: 0.85rem;
}

.pub-filter-grid select,
.pub-filter-grid input {
  width: 100%;
  border: 1px solid var(--line);
  background: rgba(11, 20, 48, 0.68);
  color: var(--ink);
  border-radius: 10px;
  padding: 9px 11px;
  font: inherit;
}

.pub-filter-grid select:focus,
.pub-filter-grid input:focus {
  outline: none;
  box-shadow: 0 0 0 2px rgba(82, 209, 255, 0.25);
}

.pub-filter-actions {
  margin-top: 12px;
}

.pub-result-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.pub-item {
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(7, 15, 38, 0.56);
  padding: 12px 14px;
}

.pub-item-title {
  margin: 0 0 4px;
  font-weight: 600;
}

.pub-item-meta {
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.pub-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 8px;
}

.pub-tag {
  font-size: 0.76rem;
  padding: 2px 8px;
  border-radius: 999px;
  border: 1px solid var(--line);
  color: var(--ink);
  background: rgba(14, 31, 74, 0.62);
}

.pub-item-footer {
  margin-top: 10px;
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.pub-link {
  display: inline-block;
  color: #041024;
  background: linear-gradient(120deg, var(--brand), var(--brand-2));
  text-decoration: none;
  border-radius: 8px;
  padding: 4px 10px;
  font-size: 0.82rem;
  font-weight: 600;
}

.collab-links {
  margin-top: 10px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.collab-links a {
  text-decoration: none;
  border: 1px solid var(--line);
  color: var(--ink);
  padding: 3px 10px;
  border-radius: 999px;
  background: rgba(14, 31, 74, 0.62);
  font-size: 0.8rem;
}

.collab-links a:hover {
  background: linear-gradient(120deg, var(--brand), var(--brand-2));
  color: #041024;
  border-color: transparent;
}

.mentorship-link {
  color: #7cf3ff;
  text-decoration: none;
  padding: 1px 6px;
  border-radius: 6px;
  border: 1px solid rgba(124, 243, 255, 0.35);
  background: rgba(9, 24, 58, 0.75);
}

.mentorship-link:hover {
  color: #041024;
  background: linear-gradient(120deg, var(--brand), var(--brand-2));
  border-color: transparent;
}

.network-graph-wrap {
  margin-top: 14px;
}

#academic-network-graph {
  width: 100%;
  max-width: 100%;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(5, 12, 32, 0.65);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.03);
}

.guestbook-form {
  display: grid;
  gap: 10px;
}

.guestbook-form label {
  font-size: 0.88rem;
  color: var(--muted);
}

.guestbook-form input,
.guestbook-form textarea {
  width: 100%;
  border: 1px solid var(--line);
  background: rgba(11, 20, 48, 0.68);
  color: var(--ink);
  border-radius: 10px;
  padding: 10px 12px;
  font: inherit;
}

.guestbook-form textarea {
  min-height: 120px;
  resize: vertical;
}

.hint {
  font-size: 0.84rem;
  color: var(--muted);
  margin: 6px 0 0;
}

.site-footer {
  border-top: 1px solid var(--line);
  padding: 16px 0;
  color: var(--muted);
  font-size: 0.95rem;
  background: rgba(4, 8, 20, 0.5);
}

#network-canvas {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: -2;
  pointer-events: none;
}

@media (max-width: 1050px) {
  .page-layout {
    grid-template-columns: minmax(220px, 280px) minmax(0, 1fr);
  }

  .right-sidebar {
    grid-column: 1 / -1;
    position: static;
  }
}

@media (max-width: 760px) {
  .site-header h1 {
    font-size: 1.5rem;
  }

  nav {
    padding-right: 0;
  }

  nav a {
    font-size: 0.9rem;
    padding: 5px 10px;
  }

  .lang-corner {
    position: static;
    margin: 2px 0 10px;
    flex-wrap: wrap;
  }

  .site-search {
    width: 100%;
  }

  .site-search input {
    width: 100%;
  }

  .page-layout {
    grid-template-columns: 1fr;
  }

  .sidebar {
    position: static;
  }

  .pub-filter-grid {
    grid-template-columns: 1fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation: none !important;
    transition: none !important;
  }
}