:root {
  --bg: #05080b;
  --bg-soft: #081018;
  --surface: rgba(12, 22, 30, 0.76);
  --surface-strong: rgba(15, 30, 40, 0.94);
  --text: #f3fbff;
  --muted: #9db1bd;
  --muted-strong: #c7d6de;
  --line: rgba(137, 232, 255, 0.18);
  --cyan: #52e8ff;
  --cyan-strong: #18bfe5;
  --green: #53f1b1;
  --green-deep: #0ca678;
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.36);
  --radius: 8px;
  --page-max: 1760px;
  --page-gutter: clamp(16px, 4vw, 72px);
  font-family: Inter, "Microsoft YaHei UI", "Microsoft YaHei", "PingFang SC", "Hiragino Sans GB", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--text);
  background:
    radial-gradient(circle at 78% 10%, rgba(82, 232, 255, 0.16), transparent 28rem),
    linear-gradient(180deg, #05080b 0%, #071017 42%, #05080b 100%);
  overflow-x: hidden;
}

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 60;
  width: calc(var(--scroll-progress, 0) * 100%);
  height: 3px;
  background: linear-gradient(90deg, var(--cyan), var(--green));
  box-shadow: 0 0 22px rgba(82, 232, 255, 0.58);
  transform-origin: left center;
}

body::before {
  position: fixed;
  inset: 0;
  z-index: -2;
  content: "";
  background-image:
    linear-gradient(rgba(82, 232, 255, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(82, 232, 255, 0.045) 1px, transparent 1px);
  background-size: 52px 52px;
  mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.82), transparent 82%);
}

a {
  color: inherit;
  text-decoration: none;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: var(--page-max);
  height: 74px;
  margin: 0 auto;
  padding: 0 var(--page-gutter);
  backdrop-filter: blur(18px);
  transition: height 220ms ease, background-color 220ms ease, border-color 220ms ease;
}

.site-header.is-scrolled {
  height: 62px;
  border-bottom: 1px solid rgba(82, 232, 255, 0.12);
  background: rgba(5, 10, 14, 0.82);
}

.brand {
  display: flex;
  gap: 14px;
  align-items: center;
  position: relative;
}

.brand-mark {
  width: 40px;
  height: 40px;
  border: 1.5px solid rgba(82, 232, 255, 0.6);
  border-radius: 50%;
  background:
    radial-gradient(circle at 50% 50%, transparent 23%, rgba(83, 241, 177, 0.9) 24%, transparent 26%),
    repeating-radial-gradient(circle at 50% 50%, transparent 0 5px, rgba(82, 232, 255, 0.8) 6px 7px, transparent 8px 10px);
  box-shadow: 0 0 40px rgba(82, 232, 255, 0.3), inset 0 0 20px rgba(82, 232, 255, 0.1);
  animation: brandPulse 3s ease-in-out infinite;
  position: relative;
  overflow: hidden;
}

.brand-mark::before {
  content: '';
  position: absolute;
  inset: -50%;
  background: conic-gradient(from 0deg, transparent, rgba(82, 232, 255, 0.4), transparent 30%);
  animation: brandRotate 4s linear infinite;
}

.brand-mark::after {
  content: '';
  position: absolute;
  inset: 2px;
  border-radius: 50%;
  background: radial-gradient(circle at 30% 30%, rgba(82, 232, 255, 0.3), transparent 70%);
}

.brand-text {
  display: flex;
  flex-direction: column;
  position: relative;
}

.brand-name {
  display: block;
  font-size: 17px;
  line-height: 1.2;
  font-weight: 800;
  letter-spacing: 0.05em;
  position: relative;
  color: var(--text);
  text-shadow: 0 0 20px rgba(82, 232, 255, 0.3);
  animation: nameGlow 4s ease-in-out infinite;
}

.brand-name::before {
  content: attr(data-text);
  position: absolute;
  inset: 0;
  color: var(--cyan);
  opacity: 0;
  filter: blur(8px);
  animation: nameGhost 4s ease-in-out infinite;
}

.brand-lab {
  display: block;
  margin-top: 4px;
  color: var(--cyan);
  font-size: 11px;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  font-weight: 600;
  position: relative;
  overflow: hidden;
}

.brand-lab::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(82, 232, 255, 0.4), transparent);
  animation: labScan 3s ease-in-out infinite;
}

.brand-lab::after {
  content: attr(data-text);
  position: absolute;
  inset: 0;
  color: var(--green);
  clip-path: inset(0 100% 0 0);
  animation: labReveal 3s ease-in-out infinite;
}

/* 鼠标悬停增强效果 */
.brand:hover .brand-mark {
  animation: brandPulse 1s ease-in-out infinite, brandRotate 2s linear infinite;
  box-shadow: 0 0 60px rgba(82, 232, 255, 0.5), inset 0 0 30px rgba(82, 232, 255, 0.2);
}

.brand:hover .brand-name {
  animation: nameGlow 1.5s ease-in-out infinite, nameShake 0.5s ease-in-out;
}

.brand:hover .brand-lab::after {
  animation: labReveal 1.5s ease-in-out infinite;
}

.brand:hover .brand-lab::before {
  animation: labScan 1.5s ease-in-out infinite;
}

.site-nav {
  display: flex;
  gap: 28px;
  align-items: center;
  color: var(--muted-strong);
  font-size: 14px;
}

.site-nav a {
  position: relative;
  transition: color 180ms ease;
}

.site-nav a::after {
  position: absolute;
  right: 0;
  bottom: -8px;
  left: 0;
  height: 1px;
  content: "";
  background: linear-gradient(90deg, transparent, var(--cyan), transparent);
  opacity: 0;
  transform: scaleX(0.25);
  transition: opacity 180ms ease, transform 180ms ease;
}

.site-nav a:hover {
  color: var(--cyan);
}

.site-nav a.is-active {
  color: var(--cyan);
}

.site-nav a:hover::after,
.site-nav a.is-active::after {
  opacity: 1;
  transform: scaleX(1);
}

.language-toggle {
  min-width: 48px;
  height: 34px;
  border: 1px solid rgba(82, 232, 255, 0.32);
  border-radius: var(--radius);
  color: var(--cyan);
  background: rgba(3, 10, 14, 0.72);
  font-size: 12px;
  font-weight: 900;
  cursor: pointer;
  transition: color 180ms ease, border-color 180ms ease, background 180ms ease, transform 180ms ease;
}

.language-toggle:hover {
  color: #031316;
  border-color: transparent;
  background: linear-gradient(135deg, var(--cyan), var(--green));
  transform: translateY(-1px);
}

.menu-toggle {
  display: none;
}

.section-shell {
  width: 100%;
  max-width: var(--page-max);
  margin: 0 auto;
  padding-right: var(--page-gutter);
  padding-left: var(--page-gutter);
}

.hero {
  display: grid;
  grid-template-columns: minmax(320px, 0.86fr) minmax(420px, 1.14fr);
  gap: clamp(32px, 5vw, 92px);
  align-items: center;
  min-height: calc(100vh - 74px);
  padding-top: clamp(38px, 5vw, 76px);
  padding-bottom: clamp(58px, 7vw, 110px);
}

.hero-copy h1 {
  max-width: 820px;
  margin: 0;
  font-size: clamp(42px, 5.4vw, 96px);
  font-weight: 800;
  line-height: 1.02;
  letter-spacing: 0;
  animation: heroTitleIn 820ms cubic-bezier(0.2, 0.8, 0.2, 1) both;
}

.hero-copy p {
  max-width: 760px;
  margin: 28px 0 0;
  color: var(--muted-strong);
  font-size: 18px;
  line-height: 1.9;
  animation: heroFadeUp 820ms 120ms cubic-bezier(0.2, 0.8, 0.2, 1) both;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 34px;
  animation: heroFadeUp 820ms 220ms cubic-bezier(0.2, 0.8, 0.2, 1) both;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 700;
  transition: transform 180ms ease, border-color 180ms ease, box-shadow 180ms ease, background 180ms ease;
}

.button:hover {
  transform: translateY(-2px);
}

.button-primary {
  color: #001014;
  background: linear-gradient(135deg, var(--cyan), var(--green));
  border-color: transparent;
  box-shadow: 0 16px 42px rgba(82, 232, 255, 0.22);
}

.button-secondary {
  color: var(--text);
  background: rgba(255, 255, 255, 0.04);
}

.hero-metrics {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  max-width: 720px;
  padding: 1px;
  margin: 42px 0 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--line);
  animation: heroFadeUp 820ms 320ms cubic-bezier(0.2, 0.8, 0.2, 1) both;
}

.hero-metrics div {
  padding: 20px;
  background: rgba(7, 14, 20, 0.88);
}

.hero-metrics dt {
  color: var(--cyan);
  font-size: 30px;
  font-weight: 800;
}

.hero-metrics dd {
  margin: 6px 0 0;
  color: var(--muted);
  font-size: 13px;
}

.hero-visual {
  position: relative;
  min-height: clamp(440px, 42vw, 720px);
  overflow: hidden;
  border: 1px solid rgba(82, 232, 255, 0.16);
  border-radius: var(--radius);
  background: #020608;
  box-shadow: var(--shadow);
  transform: translate3d(0, calc(var(--hero-parallax, 0) * 1px), 0);
  transition: transform 120ms linear;
  animation: heroVisualIn 900ms 160ms cubic-bezier(0.2, 0.8, 0.2, 1) both;
}

.hero-promo {
  aspect-ratio: 16 / 9;
  min-height: auto;
  background:
    linear-gradient(90deg, rgba(5, 8, 11, 0.18), transparent 44%),
    url("assets/lfiw-paper-intro.webp") center / cover no-repeat;
}

.hero-visual img,
.hero-visual video {
  width: 100%;
  height: 100%;
  min-height: clamp(440px, 42vw, 720px);
  object-fit: cover;
  opacity: 0.92;
  transform: translate3d(calc(var(--pointer-x, 0) * 1px), calc(var(--pointer-y, 0) * 1px), 0) scale(1.035);
  transition: transform 280ms ease-out;
  will-change: transform;
}

.hero-promo img,
.hero-promo video {
  min-height: auto;
}

.hero-visual::before {
  position: absolute;
  inset: -20% auto -20% -38%;
  z-index: 1;
  width: 30%;
  content: "";
  pointer-events: none;
  background: linear-gradient(90deg, transparent, rgba(82, 232, 255, 0.2), rgba(83, 241, 177, 0.24), transparent);
  filter: blur(10px);
  transform: skewX(-12deg);
  animation: biometricScan 5.8s ease-in-out infinite;
}

.hero-visual::after {
  position: absolute;
  inset: 0;
  content: "";
  pointer-events: none;
  background:
    linear-gradient(90deg, rgba(5, 8, 11, 0.6), transparent 44%),
    linear-gradient(0deg, rgba(5, 8, 11, 0.18), transparent 40%);
}

.scan-panel {
  position: absolute;
  right: 24px;
  bottom: 24px;
  z-index: 2;
  width: 220px;
  padding: 18px;
  border: 1px solid rgba(82, 232, 255, 0.26);
  border-radius: var(--radius);
  background: rgba(4, 12, 16, 0.78);
  backdrop-filter: blur(16px);
  animation: pulsePanel 2.8s ease-in-out infinite;
}

.scan-panel span,
.scan-panel small {
  display: block;
  color: var(--muted);
  font-size: 12px;
}

.scan-panel strong {
  display: block;
  margin: 8px 0;
  color: var(--green);
  font-size: 40px;
  line-height: 1;
}

.section-heading {
  display: grid;
  grid-template-columns: 72px minmax(180px, 0.45fr) minmax(280px, 1fr);
  gap: clamp(18px, 3vw, 44px);
  align-items: start;
  padding-top: 108px;
  margin-bottom: 34px;
}

.motion-ready .reveal {
  opacity: 0;
  transform: translate3d(0, 34px, 0);
  filter: blur(8px);
  transition:
    opacity 760ms cubic-bezier(0.2, 0.8, 0.2, 1),
    transform 760ms cubic-bezier(0.2, 0.8, 0.2, 1),
    filter 760ms cubic-bezier(0.2, 0.8, 0.2, 1);
  transition-delay: var(--reveal-delay, 0ms);
}

.motion-ready .reveal.is-visible {
  opacity: 1;
  transform: translate3d(0, 0, 0);
  filter: blur(0);
}

.section-heading span {
  color: var(--green);
  font-size: 13px;
  font-weight: 800;
}

.section-heading h2 {
  margin: 0;
  font-size: clamp(30px, 4vw, 48px);
  line-height: 1.1;
}

.section-heading p {
  margin: 0;
  color: var(--muted-strong);
  font-size: 16px;
  line-height: 1.8;
}

.research-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 18px;
}

.research-card,
.teaching-panel,
.project-main,
.project-stack article {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(14, 28, 38, 0.86), rgba(8, 16, 23, 0.74));
  box-shadow: 0 18px 70px rgba(0, 0, 0, 0.18);
}

.research-card {
  min-height: 286px;
  padding: 28px;
  transition: transform 220ms ease, border-color 220ms ease, box-shadow 220ms ease, background 220ms ease;
}

.research-card:hover,
.project-stack article:hover,
.news-list article:hover {
  border-color: rgba(82, 232, 255, 0.42);
  box-shadow: 0 26px 84px rgba(0, 0, 0, 0.3), 0 0 46px rgba(82, 232, 255, 0.08);
  transform: translateY(-4px);
}

.research-card h3,
.teaching-panel h3,
.project-main h3,
.project-stack h3 {
  margin: 22px 0 12px;
  font-size: 21px;
}

.research-card p,
.project-main p,
.project-stack p,
.teaching-panel li {
  color: var(--muted-strong);
  line-height: 1.75;
}

.card-icon {
  width: 54px;
  height: 54px;
  border: 1px solid rgba(82, 232, 255, 0.24);
  border-radius: var(--radius);
  background-color: rgba(82, 232, 255, 0.06);
  transition: transform 220ms ease, box-shadow 220ms ease;
}

.research-card:hover .card-icon {
  box-shadow: 0 0 34px rgba(82, 232, 255, 0.18);
  transform: scale(1.06) rotate(2deg);
}

.fingerprint {
  background-image: repeating-radial-gradient(ellipse at center, transparent 0 5px, rgba(82, 232, 255, 0.9) 6px 7px, transparent 8px 11px);
}

.iris {
  background-image:
    radial-gradient(circle, transparent 0 18%, rgba(83, 241, 177, 0.9) 19% 21%, transparent 22%),
    conic-gradient(from 12deg, rgba(82, 232, 255, 0.95), transparent 14deg 30deg, rgba(83, 241, 177, 0.9) 42deg, transparent 58deg);
}

.shield {
  clip-path: polygon(50% 6%, 88% 19%, 82% 68%, 50% 94%, 18% 68%, 12% 19%);
  background: linear-gradient(135deg, rgba(82, 232, 255, 0.8), rgba(83, 241, 177, 0.58));
}

.teaching-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(300px, 0.32fr);
  gap: 22px;
}

.course-list {
  display: grid;
  gap: 1px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--line);
}

.course-list article {
  display: grid;
  grid-template-columns: minmax(160px, 0.28fr) minmax(120px, 0.18fr) minmax(260px, 1fr);
  gap: 24px;
  align-items: start;
  padding: 24px;
  background: rgba(6, 13, 19, 0.9);
  transition: background 220ms ease, transform 220ms ease;
}

.course-list article:hover {
  background: rgba(12, 30, 40, 0.94);
  transform: translateX(4px);
}

.course-list strong {
  font-size: 18px;
}

.course-list span {
  color: var(--green);
  font-size: 13px;
  font-weight: 700;
}

.course-list p {
  margin: 0;
  color: var(--muted-strong);
  line-height: 1.7;
}

.teaching-panel {
  padding: 28px;
}

.teaching-panel h3 {
  margin-top: 0;
}

.teaching-panel ul {
  display: grid;
  gap: 16px;
  padding: 0;
  margin: 22px 0 0;
  list-style: none;
}

.teaching-panel li {
  padding-left: 18px;
  border-left: 2px solid var(--cyan);
}

.challenge-hero {
  display: grid;
  grid-template-columns: minmax(0, 0.72fr) minmax(360px, 0.88fr);
  gap: 22px;
  align-items: stretch;
  margin-bottom: 22px;
  padding: 34px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    radial-gradient(circle at 92% 18%, rgba(83, 241, 177, 0.12), transparent 20rem),
    linear-gradient(135deg, rgba(14, 28, 38, 0.92), rgba(5, 11, 16, 0.86));
  box-shadow: var(--shadow);
}

.challenge-hero h3 {
  margin: 0 0 14px;
  font-size: clamp(26px, 3vw, 42px);
}

.challenge-hero p {
  max-width: 820px;
  margin: 0;
  color: var(--muted-strong);
  line-height: 1.8;
}

.challenge-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  overflow: hidden;
  border: 1px solid rgba(82, 232, 255, 0.16);
  border-radius: var(--radius);
  background: rgba(82, 232, 255, 0.16);
}

.challenge-stats article {
  padding: 22px;
  background: rgba(3, 10, 14, 0.78);
}

.challenge-stats strong {
  display: block;
  color: var(--green);
  font-size: clamp(26px, 3vw, 40px);
  line-height: 1;
}

.challenge-stats span {
  display: block;
  margin-top: 10px;
  color: var(--muted);
  font-size: 13px;
}

.challenge-grid {
  display: grid;
  gap: 18px;
}

.challenge-card {
  display: grid;
  grid-template-columns: 112px minmax(0, 1fr);
  min-height: 280px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(14, 28, 38, 0.88), rgba(8, 16, 23, 0.74));
  box-shadow: 0 18px 70px rgba(0, 0, 0, 0.18);
  transition: transform 220ms ease, border-color 220ms ease, box-shadow 220ms ease;
}

.challenge-card:hover {
  border-color: rgba(82, 232, 255, 0.42);
  box-shadow: 0 26px 84px rgba(0, 0, 0, 0.3), 0 0 46px rgba(82, 232, 255, 0.08);
  transform: translateY(-4px);
}

.challenge-card-active {
  border-color: rgba(83, 241, 177, 0.32);
}

.challenge-year {
  display: grid;
  place-items: center;
  color: #031316;
  background:
    linear-gradient(180deg, rgba(82, 232, 255, 0.95), rgba(83, 241, 177, 0.88)),
    var(--cyan);
  font-size: 26px;
  font-weight: 900;
  writing-mode: vertical-rl;
  text-orientation: mixed;
  letter-spacing: 0.08em;
}

.challenge-card-body {
  padding: 28px;
}

.challenge-card-body h3 {
  margin: 0 0 12px;
  font-size: clamp(22px, 2.5vw, 32px);
}

.challenge-card-body p {
  max-width: 980px;
  margin: 0;
  color: var(--muted-strong);
  line-height: 1.75;
}

.challenge-metrics,
.challenge-timeline {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 20px;
}

.challenge-metrics span,
.challenge-timeline span {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 0 12px;
  border: 1px solid rgba(82, 232, 255, 0.2);
  border-radius: var(--radius);
  color: var(--muted-strong);
  background: rgba(2, 8, 11, 0.58);
  font-size: 13px;
  font-weight: 700;
}

.result-bars {
  display: grid;
  gap: 12px;
  margin-top: 24px;
}

.result-bars div {
  position: relative;
  display: grid;
  grid-template-columns: minmax(180px, 1fr) 72px;
  gap: 16px;
  align-items: center;
  min-height: 42px;
  padding: 0 14px;
  overflow: hidden;
  border: 1px solid rgba(82, 232, 255, 0.14);
  border-radius: var(--radius);
  background: rgba(2, 8, 11, 0.58);
}

.result-bars div::before {
  position: absolute;
  inset: 0 auto 0 0;
  width: var(--bar);
  content: "";
  background: linear-gradient(90deg, rgba(82, 232, 255, 0.2), rgba(83, 241, 177, 0.16));
}

.result-bars span,
.result-bars strong {
  position: relative;
  z-index: 1;
}

.result-bars span {
  color: var(--muted-strong);
  font-size: 13px;
}

.result-bars strong {
  justify-self: end;
  color: var(--green);
}

.challenge-card details {
  margin-top: 22px;
}

.challenge-card summary {
  cursor: pointer;
  color: var(--cyan);
  font-size: 14px;
  font-weight: 800;
}

.challenge-detail {
  margin-top: 16px;
  padding: 18px;
  border: 1px solid rgba(82, 232, 255, 0.16);
  border-radius: var(--radius);
  background: rgba(3, 10, 14, 0.66);
}

.challenge-detail ol {
  display: grid;
  gap: 8px;
  padding-left: 20px;
  margin: 14px 0;
  color: var(--muted-strong);
  line-height: 1.65;
}

.challenge-detail a {
  display: inline-flex;
  align-items: center;
  min-height: 36px;
  padding: 0 12px;
  border: 1px solid rgba(82, 232, 255, 0.28);
  border-radius: var(--radius);
  color: var(--cyan);
  font-size: 13px;
  font-weight: 800;
}

.publication-list {
  display: grid;
  gap: 14px;
  position: relative;
}

.publication-list::before {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 42px;
  width: 1px;
  content: "";
  background: linear-gradient(180deg, var(--cyan), rgba(83, 241, 177, 0.12));
  opacity: 0.32;
}

.publication-list article {
  position: relative;
  display: grid;
  grid-template-columns: 86px minmax(0, 1fr) 58px;
  gap: 24px;
  align-items: center;
  padding: 22px 0;
  border-bottom: 1px solid var(--line);
  transition: background 220ms ease, padding-left 220ms ease;
}

.publication-list article::before {
  position: absolute;
  top: 34px;
  left: 36px;
  width: 12px;
  height: 12px;
  content: "";
  border: 1px solid var(--cyan);
  border-radius: 50%;
  background: var(--bg);
  box-shadow: 0 0 18px rgba(82, 232, 255, 0.25);
}

.publication-list article:hover {
  padding-left: 12px;
  background: rgba(82, 232, 255, 0.035);
}

.publication-list time {
  color: var(--green);
  font-weight: 800;
}

.publication-list h3 {
  margin: 0 0 8px;
  font-size: 19px;
  line-height: 1.45;
}

.publication-list p {
  margin: 0;
  color: var(--muted);
}

.publication-list a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 36px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--cyan);
  font-size: 12px;
  font-weight: 800;
}

.project-overview {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  padding: 1px;
  margin-bottom: 22px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--line);
}

.project-overview article {
  padding: 24px;
  background:
    linear-gradient(135deg, rgba(82, 232, 255, 0.08), transparent 42%),
    rgba(6, 13, 19, 0.92);
}

.project-overview strong {
  display: block;
  color: var(--cyan);
  font-size: clamp(26px, 3vw, 42px);
  line-height: 1;
}

.project-overview span {
  display: block;
  margin-top: 10px;
  color: var(--muted);
  font-size: 13px;
}

.project-list {
  display: grid;
  gap: 18px;
}

.project-item {
  position: relative;
  display: grid;
  grid-template-columns: 108px minmax(0, 1fr);
  gap: 26px;
  padding: 28px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    radial-gradient(circle at 88% 18%, rgba(82, 232, 255, 0.12), transparent 22rem),
    linear-gradient(180deg, rgba(14, 28, 38, 0.88), rgba(8, 16, 23, 0.74));
  box-shadow: 0 18px 70px rgba(0, 0, 0, 0.18);
  transition: transform 220ms ease, border-color 220ms ease, box-shadow 220ms ease;
}

.project-item::before {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  width: 3px;
  content: "";
  background: linear-gradient(180deg, var(--cyan), var(--green));
  opacity: 0.74;
}

.project-featured {
  grid-template-columns: 128px minmax(0, 1fr);
  padding: 34px;
  border-color: rgba(82, 232, 255, 0.34);
}

.project-live {
  border-color: rgba(83, 241, 177, 0.38);
  background:
    linear-gradient(115deg, transparent 0 36%, rgba(83, 241, 177, 0.08) 46%, transparent 58%),
    radial-gradient(circle at 88% 18%, rgba(82, 232, 255, 0.12), transparent 22rem),
    linear-gradient(180deg, rgba(14, 28, 38, 0.9), rgba(8, 16, 23, 0.76));
  background-size: 220% 100%, auto, auto;
  animation: liveProjectSweep 7s ease-in-out infinite;
}

.project-live::before {
  width: 4px;
  background: linear-gradient(180deg, transparent, var(--green), var(--cyan), transparent);
  background-size: 100% 220%;
  opacity: 1;
  animation: liveProgressFlow 2.8s linear infinite;
  box-shadow: 0 0 22px rgba(83, 241, 177, 0.38);
}

.project-featured::after {
  position: absolute;
  right: -90px;
  bottom: -140px;
  width: 320px;
  height: 320px;
  content: "";
  border: 1px solid rgba(82, 232, 255, 0.2);
  border-radius: 50%;
  background:
    radial-gradient(circle, transparent 0 30%, rgba(82, 232, 255, 0.08) 31% 32%, transparent 33%),
    repeating-radial-gradient(circle, transparent 0 16px, rgba(83, 241, 177, 0.14) 17px 18px, transparent 19px 28px);
  animation: irisRotate 18s linear infinite;
}

.project-item:hover {
  border-color: rgba(82, 232, 255, 0.42);
  box-shadow: 0 26px 84px rgba(0, 0, 0, 0.3), 0 0 46px rgba(82, 232, 255, 0.08);
  transform: translateY(-4px);
}

.project-status {
  position: relative;
  z-index: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  align-self: start;
  min-height: 38px;
  padding: 0 14px;
  border: 1px solid rgba(82, 232, 255, 0.3);
  border-radius: 999px;
  color: var(--cyan);
  background: rgba(2, 8, 11, 0.68);
  font-size: 13px;
  font-weight: 800;
}

.project-status.active {
  color: var(--green);
  border-color: rgba(83, 241, 177, 0.62);
  background: rgba(1, 13, 15, 0.92);
  box-shadow: 0 0 24px rgba(83, 241, 177, 0.18);
}

.project-live .project-status.active::before {
  width: 8px;
  height: 8px;
  margin-right: 8px;
  content: "";
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 16px rgba(83, 241, 177, 0.85);
  animation: liveDotPulse 1.6s ease-in-out infinite;
}

.project-status.pending {
  color: var(--green);
}

.project-status.done {
  color: var(--muted-strong);
  border-color: rgba(157, 177, 189, 0.28);
}

.project-content {
  position: relative;
  z-index: 1;
}

.project-content h3 {
  margin: 0 0 14px;
  font-size: clamp(21px, 2.4vw, 30px);
  line-height: 1.35;
}

.project-content p {
  max-width: 1040px;
  margin: 0 0 24px;
  color: var(--muted-strong);
  line-height: 1.78;
}

.project-content dl {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  padding: 1px;
  margin: 0;
  overflow: hidden;
  border: 1px solid rgba(82, 232, 255, 0.14);
  border-radius: var(--radius);
  background: rgba(82, 232, 255, 0.14);
}

.project-content dl div {
  padding: 16px;
  background: rgba(3, 10, 14, 0.78);
}

.project-content dt {
  margin-bottom: 8px;
  color: var(--muted);
  font-size: 12px;
}

.project-content dd {
  margin: 0;
  color: var(--text);
  font-size: 14px;
  font-weight: 700;
  line-height: 1.55;
}

.project-item.is-visible .project-status {
  animation: pipelinePulse 950ms ease both;
}

.project-item.is-visible .project-status.active {
  animation: none;
}

.project-live.is-visible .project-status.active {
  animation: liveStatusBreath 2.4s ease-in-out infinite;
}

.news-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 18px;
}

.news-list article {
  padding: 24px;
  border-top: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(82, 232, 255, 0.05), transparent);
  transition: transform 220ms ease, border-color 220ms ease, box-shadow 220ms ease;
}

.news-list time {
  display: block;
  margin-bottom: 14px;
  color: var(--green);
  font-weight: 800;
}

.news-list p {
  margin: 0;
  color: var(--muted-strong);
  line-height: 1.75;
}

.site-footer {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 0.72fr);
  gap: 42px;
  width: 100%;
  max-width: var(--page-max);
  padding: 58px var(--page-gutter) 72px;
  margin: 98px auto 0;
  border-top: 1px solid var(--line);
}

.site-footer h2 {
  margin: 0 0 16px;
  font-size: clamp(30px, 5vw, 56px);
}

.site-footer p,
.site-footer span {
  color: var(--muted-strong);
  line-height: 1.75;
}

.site-footer address {
  display: grid;
  gap: 12px;
  align-content: start;
  font-style: normal;
}

.site-footer a {
  color: var(--cyan);
  font-size: 20px;
  font-weight: 800;
}

@keyframes heroTitleIn {
  from {
    opacity: 0;
    transform: translate3d(0, 24px, 0) scale(0.98);
    filter: blur(8px);
  }

  to {
    opacity: 1;
    transform: translate3d(0, 0, 0) scale(1);
    filter: blur(0);
  }
}

@keyframes brandPulse {
  0%, 100% {
    box-shadow: 0 0 40px rgba(82, 232, 255, 0.3), inset 0 0 20px rgba(82, 232, 255, 0.1);
    transform: scale(1);
  }
  50% {
    box-shadow: 0 0 60px rgba(82, 232, 255, 0.5), inset 0 0 30px rgba(82, 232, 255, 0.2);
    transform: scale(1.05);
  }
}

@keyframes brandRotate {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

@keyframes nameGlow {
  0%, 100% {
    text-shadow: 0 0 20px rgba(82, 232, 255, 0.3), 0 0 40px rgba(82, 232, 255, 0.1);
    color: var(--text);
  }
  50% {
    text-shadow: 0 0 30px rgba(82, 232, 255, 0.6), 0 0 60px rgba(82, 232, 255, 0.2), 0 0 90px rgba(83, 241, 177, 0.1);
    color: var(--cyan);
  }
}

@keyframes nameGhost {
  0%, 100% { opacity: 0; transform: translateX(0); }
  50% { opacity: 0.6; transform: translateX(2px); }
}

@keyframes nameShake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-1px); }
  75% { transform: translateX(1px); }
}

@keyframes labScan {
  0% { left: -100%; }
  100% { left: 200%; }
}

@keyframes labReveal {
  0% { clip-path: inset(0 100% 0 0); }
  50% { clip-path: inset(0 0 0 0); }
  100% { clip-path: inset(0 0 0 100%); }
}

@keyframes heroFadeUp {
  from {
    opacity: 0;
    transform: translate3d(0, 22px, 0);
  }

  to {
    opacity: 1;
    transform: translate3d(0, 0, 0);
  }
}

@keyframes heroVisualIn {
  from {
    opacity: 0;
    transform: translate3d(28px, 18px, 0) scale(0.985);
  }

  to {
    opacity: 1;
    transform: translate3d(0, calc(var(--hero-parallax, 0) * 1px), 0) scale(1);
  }
}

@keyframes biometricScan {
  0%,
  18% {
    transform: translateX(0) skewX(-12deg);
    opacity: 0;
  }

  38% {
    opacity: 1;
  }

  74% {
    opacity: 0.8;
  }

  100% {
    transform: translateX(520%) skewX(-12deg);
    opacity: 0;
  }
}

@keyframes pulsePanel {
  0%,
  100% {
    box-shadow: 0 0 0 rgba(82, 232, 255, 0);
  }

  50% {
    box-shadow: 0 0 36px rgba(82, 232, 255, 0.18);
  }
}

@keyframes irisRotate {
  to {
    transform: rotate(360deg);
  }
}

@keyframes pipelinePulse {
  0% {
    color: var(--muted-strong);
    transform: translateY(0);
  }

  45% {
    color: #031316;
    border-color: transparent;
    background: linear-gradient(135deg, var(--cyan), var(--green));
    transform: translateY(-5px);
  }

  100% {
    color: var(--muted-strong);
    transform: translateY(0);
  }
}

@keyframes liveProjectSweep {
  0%,
  100% {
    background-position: 130% 0, center, center;
  }

  50% {
    background-position: -40% 0, center, center;
  }
}

@keyframes liveProgressFlow {
  from {
    background-position: 0 220%;
  }

  to {
    background-position: 0 -20%;
  }
}

@keyframes liveDotPulse {
  0%,
  100% {
    opacity: 0.62;
    transform: scale(0.82);
  }

  50% {
    opacity: 1;
    transform: scale(1.18);
  }
}

@keyframes liveStatusBreath {
  0%,
  100% {
    box-shadow: 0 0 18px rgba(83, 241, 177, 0.14);
  }

  50% {
    box-shadow: 0 0 34px rgba(83, 241, 177, 0.34);
  }
}

@media (min-width: 1500px) {
  .site-nav {
    gap: 34px;
    font-size: 15px;
  }

  .research-card {
    min-height: 320px;
    padding: 34px;
  }

  .course-list article,
  .project-item,
  .challenge-card-body,
  .news-list article {
    padding: 30px;
  }
}

@media (max-width: 1180px) {
  .hero {
    grid-template-columns: minmax(0, 1fr);
  }

  .hero-copy {
    max-width: 860px;
  }

  .hero-visual {
    max-height: 620px;
  }

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

  .challenge-hero {
    grid-template-columns: 1fr;
  }

  .course-list article {
    grid-template-columns: minmax(160px, 0.35fr) minmax(120px, 0.22fr) minmax(220px, 1fr);
  }

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

@media (max-width: 920px) {
  .menu-toggle {
    display: inline-grid;
    gap: 5px;
    width: 42px;
    height: 42px;
    place-content: center;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: rgba(255, 255, 255, 0.03);
  }

  .menu-toggle span {
    display: block;
    width: 18px;
    height: 2px;
    background: var(--text);
  }

  .site-nav {
    position: absolute;
    top: 66px;
    right: 0;
    left: 0;
    display: none;
    grid-template-columns: 1fr;
    gap: 0;
    padding: 10px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: rgba(5, 10, 14, 0.96);
  }

  .site-nav.is-open {
    display: grid;
  }

  .site-nav a {
    padding: 14px;
  }

  .site-footer {
    grid-template-columns: 1fr;
  }

  .hero {
    gap: 34px;
    min-height: auto;
    padding-top: 36px;
  }

  .hero-visual,
  .hero-visual img,
  .hero-visual video {
    min-height: 420px;
  }

  .section-heading {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .research-grid,
  .news-list {
    grid-template-columns: 1fr;
  }

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

  .challenge-card {
    grid-template-columns: 84px minmax(0, 1fr);
  }

  .project-item,
  .project-featured {
    grid-template-columns: 1fr;
  }

  .course-list article {
    grid-template-columns: 1fr;
    gap: 10px;
  }
  
  /* 移动端品牌区域适配 */
  .brand-name {
    font-size: 15px;
  }
  
  .brand-lab {
    font-size: 10px;
    letter-spacing: 0.1em;
  }
  
  .brand-mark {
    width: 34px;
    height: 34px;
  }
}

@media (max-width: 620px) {
  :root {
    --page-gutter: 14px;
  }

  .site-header,
  .section-shell,
  .site-footer {
    width: 100%;
  }

  .hero-copy h1 {
    font-size: clamp(34px, 11vw, 42px);
    line-height: 1.08;
  }

  .hero-copy p {
    font-size: 16px;
  }

  .hero-metrics,
  .publication-list article,
  .project-content dl {
    grid-template-columns: 1fr;
  }

  .challenge-stats {
    grid-template-columns: 1fr;
  }

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

  .challenge-year {
    min-height: 62px;
    writing-mode: horizontal-tb;
    text-orientation: mixed;
  }

  .result-bars div {
    grid-template-columns: 1fr;
    gap: 4px;
    padding: 10px 12px;
  }

  .result-bars strong {
    justify-self: start;
  }

  .hero-actions {
    display: grid;
    grid-template-columns: 1fr;
  }

  .button {
    width: 100%;
  }

  .hero-metrics div,
  .publication-list article {
    padding: 18px;
  }

  .hero-visual,
  .hero-visual img,
  .hero-visual video {
    min-height: 320px;
  }

  .publication-list::before,
  .publication-list article::before {
    display: none;
  }

  .scan-panel {
    right: 14px;
    bottom: 14px;
    width: min(190px, calc(100% - 28px));
  }
}

@media (max-width: 420px) {
  .brand-name {
    font-size: 15px;
  }
  
  .brand-lab {
    font-size: 10px;
    letter-spacing: 0.1em;
  }
  
  .brand-mark {
    width: 32px;
    height: 32px;
  }

  .hero {
    padding-top: 24px;
  }

  .hero-copy p,
  .section-heading p {
    font-size: 15px;
    line-height: 1.75;
  }

  .research-card,
  .teaching-panel,
  .project-item,
  .challenge-hero,
  .challenge-card-body,
  .news-list article {
    padding: 20px;
  }

  .project-content h3 {
    font-size: 24px;
  }

  .project-overview {
    grid-template-columns: 1fr;
  }
}

.hero-promo,
.hero-promo img,
.hero-promo video {
  min-height: auto;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 1ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: 1ms !important;
  }

  .motion-ready .reveal {
    opacity: 1;
    transform: none;
    filter: none;
  }

  .hero-visual,
  .hero-visual img,
  .hero-visual video {
    transform: none;
  }
}