:root {
  --ink: #17202a;
  --muted: #657080;
  --line: #dfe5ec;
  --paper: #ffffff;
  --wash: #f6f8fb;
  --blue: #0b6f9d;
  --green: #57a846;
  --orange: #e66b2c;
  --max: 1160px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "Noto Sans SC", "Microsoft YaHei", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.72;
}

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

a:hover {
  text-decoration: underline;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(255, 255, 255, 0.96);
  border-bottom: 1px solid var(--line);
}

.nav-wrap,
.container {
  width: min(100% - 40px, var(--max));
  margin: 0 auto;
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 76px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--ink);
}

.brand img {
  width: 48px;
  height: 48px;
  object-fit: contain;
}

.brand strong {
  display: block;
  font-size: 18px;
  letter-spacing: 0;
}

.brand span {
  display: block;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.2;
  text-transform: uppercase;
}

.nav {
  display: flex;
  align-items: center;
  gap: 2px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.nav a {
  color: #263241;
  padding: 8px 12px;
  border-radius: 4px;
  font-size: 15px;
}

.nav a.active,
.nav a:hover {
  color: var(--blue);
  background: #eef6fa;
  text-decoration: none;
}

.hero {
  border-bottom: 1px solid var(--line);
  background:
    linear-gradient(90deg, rgba(11, 111, 157, 0.08), rgba(230, 107, 44, 0.08)),
    var(--wash);
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 360px;
  gap: 52px;
  align-items: center;
  min-height: 520px;
  padding: 66px 0 58px;
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--blue);
  font-weight: 700;
  font-size: 13px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  line-height: 1.25;
  margin: 0;
  letter-spacing: 0;
}

h1 {
  max-width: 780px;
  font-size: clamp(36px, 6vw, 64px);
  font-weight: 800;
}

h2 {
  font-size: 30px;
  margin-bottom: 18px;
}

h3 {
  font-size: 20px;
  margin-bottom: 8px;
}

.lead {
  max-width: 760px;
  color: #344050;
  font-size: 19px;
  margin: 24px 0 0;
}

.hero-logo {
  display: grid;
  place-items: center;
  min-height: 300px;
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid rgba(223, 229, 236, 0.9);
  border-radius: 8px;
}

.hero-logo img {
  width: min(76%, 280px);
  height: auto;
}

.quick-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--line);
  border-bottom: 1px solid var(--line);
}

.stat {
  background: var(--paper);
  padding: 26px;
}

.stat strong {
  display: block;
  color: var(--blue);
  font-size: 30px;
  line-height: 1;
}

.stat span {
  display: block;
  color: var(--muted);
  margin-top: 8px;
}

.section {
  padding: 64px 0;
}

.section.alt {
  background: var(--wash);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.section-head {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 28px;
}

.section-head p {
  max-width: 680px;
  margin: 0;
  color: var(--muted);
}

.grid {
  display: grid;
  gap: 22px;
}

.grid.two {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.grid.three {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.panel,
.person,
.paper,
.direction {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.panel,
.person,
.direction {
  padding: 24px;
}

.panel p,
.person p,
.direction p {
  margin: 8px 0 0;
  color: #394657;
}

.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 16px;
}

.tag {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  padding: 3px 10px;
  color: #244155;
  background: #eef6f1;
  border: 1px solid #d7ead9;
  border-radius: 999px;
  font-size: 13px;
}

.news-list,
.paper-list {
  display: grid;
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.news-list li {
  display: grid;
  grid-template-columns: 92px minmax(0, 1fr);
  gap: 16px;
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
}

.news-list time {
  color: var(--orange);
  font-weight: 700;
}

.page-title {
  background: var(--wash);
  border-bottom: 1px solid var(--line);
}

.page-title .container {
  padding: 54px 0 48px;
}

.page-title p {
  max-width: 780px;
  color: var(--muted);
  margin: 14px 0 0;
  font-size: 18px;
}

.person {
  display: grid;
  gap: 12px;
  align-content: start;
}

.person.leader {
  grid-template-columns: minmax(0, 1fr) 260px;
  gap: 28px;
}

.person-meta {
  color: var(--muted);
  font-size: 14px;
}

.student-card {
  grid-template-columns: 132px minmax(0, 1fr);
  gap: 18px;
}

.student-card .student-photo {
  width: 132px;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  object-position: center;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--wash);
}

.student-details {
  min-width: 0;
}

.student-details h3 {
  margin-top: 2px;
}

.group-gallery {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.group-gallery img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--paper);
}

.logo-tile {
  display: grid;
  place-items: center;
  background: var(--wash);
  border-radius: 8px;
  min-height: 220px;
}

.logo-tile img {
  width: 74%;
  max-width: 210px;
}

.faculty-photo-tile img {
  width: 100%;
  max-width: 220px;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  border-radius: 8px;
  border: 1px solid var(--line);
}

.direction {
  position: relative;
  overflow: hidden;
}

.direction::before {
  content: "";
  display: block;
  width: 48px;
  height: 4px;
  margin-bottom: 18px;
  background: linear-gradient(90deg, var(--blue), var(--green), var(--orange));
}

.research-overview {
  max-width: 980px;
  margin-bottom: 34px;
  padding: 28px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.research-overview p {
  margin: 10px 0 0;
  color: #394657;
}

.research-stack {
  display: grid;
  gap: 28px;
}

.research-direction {
  display: grid;
  grid-template-columns: minmax(280px, 0.9fr) minmax(0, 1.4fr);
  gap: 28px;
  align-items: start;
  padding: 28px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.research-copy {
  position: sticky;
  top: 108px;
}

.research-copy p {
  margin: 10px 0 0;
  color: #394657;
}

.research-figures {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.research-figures figure {
  margin: 0;
  min-width: 0;
}

.research-figures img {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: contain;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px;
}

.research-figures figcaption {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.45;
  margin-top: 8px;
  text-align: center;
}

.paper {
  padding: 18px 20px;
}

.paper strong {
  color: #1f2c39;
}

.paper p {
  margin: 6px 0 0;
  color: var(--muted);
}

.paper-year {
  margin: 32px 0 14px;
  color: var(--blue);
  font-size: 22px;
  border-bottom: 2px solid var(--line);
  padding-bottom: 8px;
}

.contact-card {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.contact-line {
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}

.contact-line strong {
  display: block;
}

.source-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 18px;
}

.source-links a {
  font-size: 14px;
}

.faculty-jump {
  position: sticky;
  top: 77px;
  z-index: 10;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: -18px 0 22px;
  padding: 14px;
  background: rgba(255, 255, 255, 0.96);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.faculty-jump a {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 5px 12px;
  color: #244155;
  background: var(--wash);
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 14px;
}

.faculty-jump a:hover {
  color: var(--blue);
  background: #eef6fa;
  text-decoration: none;
}

.faculty-original {
  overflow-x: auto;
  color: #2c3846;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 34px;
}

.faculty-original,
.faculty-original * {
  font-family: "Noto Sans SC", "Microsoft YaHei", Arial, sans-serif !important;
  letter-spacing: 0 !important;
}

.faculty-original p,
.faculty-original li,
.faculty-original td,
.faculty-original font,
.faculty-original span {
  color: #344050 !important;
  font-size: 15px !important;
  line-height: 1.72 !important;
}

.faculty-original p {
  margin: 9px 0 !important;
}

.faculty-original b,
.faculty-original strong,
.faculty-original u {
  color: #182536 !important;
}

.faculty-original a {
  color: var(--blue) !important;
  font-weight: 650;
  overflow-wrap: anywhere;
  text-decoration: none;
  border-bottom: 1px solid rgba(11, 111, 157, 0.28);
}

.faculty-original a:hover {
  color: #064b73 !important;
  border-bottom-color: #064b73;
}

.faculty-original table {
  width: 100% !important;
  max-width: 100%;
  border-collapse: collapse;
}

.faculty-original img {
  max-width: 100%;
  height: auto;
}

.faculty-original #table1 {
  margin: 0 0 30px;
  background:
    linear-gradient(90deg, rgba(11, 111, 157, 0.08), rgba(87, 168, 70, 0.08)),
    var(--wash);
  border: 1px solid var(--line);
  border-radius: 8px;
  border-collapse: separate;
  border-spacing: 0;
}

.faculty-original #table1 td {
  padding: 8px 18px !important;
  vertical-align: middle;
}

.faculty-original #table1 td[rowspan] {
  width: 230px !important;
  text-align: center;
}

.faculty-original #table1 img[src*="YunZhang"] {
  width: 180px !important;
  height: 206px !important;
  object-fit: cover;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  padding: 4px;
}

.faculty-original #table1 img:not([src*="YunZhang"]) {
  width: auto !important;
  max-height: 54px;
  margin-right: 10px;
  vertical-align: middle;
}

.faculty-original #table1 tr:first-child td:last-child b,
.faculty-original #table1 tr:first-child td:last-child font {
  color: var(--ink) !important;
  font-size: 28px !important;
  line-height: 1.2 !important;
}

.faculty-original p:has(> b span[style*="navy"]),
.faculty-original p:has(> b span[style*="#000080"]),
.faculty-original p:has(> span[style*="#000080"] > b),
.faculty-original p:has(> b > span[style*="color: #000080"]) {
  margin: 34px 0 16px !important;
  padding-bottom: 9px;
  border-bottom: 2px solid var(--line);
}

.faculty-original p:has(> b span[style*="navy"]) *,
.faculty-original p:has(> b span[style*="#000080"]) *,
.faculty-original p:has(> span[style*="#000080"] > b) *,
.faculty-original p:has(> b > span[style*="color: #000080"]) * {
  color: var(--blue) !important;
  font-size: 22px !important;
  font-weight: 800 !important;
  line-height: 1.3 !important;
}

.faculty-original ul,
.faculty-original ol {
  margin: 10px 0 24px !important;
  padding-left: 22px !important;
  list-style-position: outside;
}

.faculty-original li {
  margin: 9px 0 !important;
  padding-left: 4px;
}

.faculty-original li,
.faculty-original li p,
.faculty-original li span,
.faculty-original li font {
  text-indent: 0 !important;
}

.faculty-original li p {
  margin-left: 0 !important;
  padding-left: 0 !important;
}

.faculty-original img[src*="new.gif"],
.faculty-original img[src*="/new.gif"],
.faculty-original img[src*="image/new.gif"] {
  width: auto !important;
  max-height: 18px;
  margin-right: 6px;
  vertical-align: -3px;
}

.faculty-original a[href*="rapidcounter"],
.faculty-original img[src*="rapidcounter"],
.faculty-original script {
  display: none !important;
}

.faculty-anchor {
  display: block;
  position: relative;
  top: -110px;
  height: 0;
  visibility: hidden;
}

.site-footer {
  color: #d6dde5;
  background: #17202a;
  padding: 34px 0;
}

.footer-grid {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.site-footer a {
  color: #b8e2ff;
}

.site-footer p {
  margin: 4px 0;
}

@media (max-width: 900px) {
  .nav-wrap {
    align-items: flex-start;
    flex-direction: column;
    padding: 14px 0;
    gap: 10px;
  }

  .nav {
    justify-content: flex-start;
  }

  .hero-grid,
  .person.leader,
  .contact-card,
  .research-direction {
    grid-template-columns: 1fr;
  }

  .research-copy {
    position: static;
  }

  .student-card {
    grid-template-columns: 112px minmax(0, 1fr);
  }

  .student-card .student-photo {
    width: 112px;
  }

  .hero-grid {
    gap: 28px;
    min-height: auto;
    padding: 44px 0;
  }

  .quick-stats,
  .grid.three,
  .grid.two {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 620px) {
  .nav-wrap,
  .container {
    width: min(100% - 28px, var(--max));
  }

  .brand strong {
    font-size: 16px;
  }

  .nav a {
    padding: 7px 9px;
    font-size: 14px;
  }

  .quick-stats,
  .grid.three,
  .grid.two {
    grid-template-columns: 1fr;
  }

  .student-card {
    grid-template-columns: 1fr;
  }

  .student-card .student-photo {
    width: min(180px, 70vw);
  }

  .research-overview,
  .research-direction {
    padding: 22px;
  }

  .research-figures {
    grid-template-columns: 1fr;
  }

  .group-gallery {
    grid-template-columns: 1fr;
  }

  .section {
    padding: 46px 0;
  }

  .section-head {
    display: block;
  }

  .news-list li {
    grid-template-columns: 1fr;
    gap: 4px;
  }

  .footer-grid {
    display: block;
  }

}