/* ============================================
   植溯实验室 - 主样式表
   现代 CSS：Grid / Flexbox / 自定义属性 / 响应式
   ============================================ */

/* ---- CSS 自定义属性（修改变量即可调整整体风格）---- */
:root {
  --color-bg: #0a0e0f;
  --color-bg-alt: #0f1416;
  --color-surface: #141a1d;
  --color-surface-hover: #1a2125;
  --color-border: #1e2a2f;
  --color-border-glow: rgba(74, 222, 128, 0.15);
  --color-primary: #4ade80;
  --color-primary-dim: rgba(74, 222, 128, 0.15);
  --color-accent: #22d3ee;
  --color-accent-dim: rgba(34, 211, 238, 0.12);
  --color-text: #e2e8f0;
  --color-text-dim: #64748b;
  --color-text-muted: #475569;
  --color-white: #f8fafc;

  --font-mono: 'Inter', 'Noto Sans SC', system-ui, sans-serif;
  --font-sans: 'Inter', 'Noto Sans SC', system-ui, sans-serif;
  --font-display: 'Inter', 'Noto Sans SC', system-ui, sans-serif;

  --max-width: 1280px;
  --nav-height: 64px;
  --radius: 8px;
  --radius-lg: 16px;

  --transition-fast: 0.15s ease;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.6s cubic-bezier(0.4, 0, 0.2, 1);

  /* ---- 毛玻璃 ---- */
  --glass-bg: rgba(20, 26, 29, 0.20);
  --glass-bg-hover: rgba(26, 34, 38, 0.35);
  --glass-border: rgba(255, 255, 255, 0.06);
  --glass-border-hover: rgba(74, 222, 128, 0.12);
  --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
  --glass-blur: blur(14px);
}

/* ---- Reset & Base ---- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  overflow-x: hidden;
  min-height: 100vh;
}

/* ---- 楼层滚动吸附（CSS原生接管，禁止停在两楼之间）---- */
html {
  scroll-snap-type: y mandatory;
}

.hero,
.section {
  scroll-snap-align: start;
  scroll-snap-stop: always;
}

/* ---- 毛玻璃基类 ---- */
.glass {
  background: var(--glass-bg);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  border: 1px solid var(--glass-border);
  position: relative;
  overflow: hidden;
}

.glass::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: radial-gradient(400px circle at var(--mx, 50%) var(--my, 50%), rgba(74, 222, 128, 0.1), transparent 60%);
  opacity: 0;
  transition: opacity 0.4s ease;
  pointer-events: none;
  z-index: 0;
}

.glass:hover {
  background: var(--glass-bg-hover);
  border-color: var(--glass-border-hover);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3), 0 0 16px rgba(74, 222, 128, 0.05);
}

.glass:hover::after {
  opacity: 1;
}

.glass > * {
  position: relative;
  z-index: 1;
}
img {
  max-width: 100%;
  height: auto;
  display: block;
}

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

/* ---- Three.js 3D 背景 Canvas ---- */
#particles-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: auto;
  z-index: 0;
  opacity: 0.8;
  touch-action: none;
}

@media (max-width: 768px) {
  #particles-canvas {
    opacity: 0.6;
  }
}

/* ---- 导航栏 ---- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--nav-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 2rem;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  background: rgba(10, 14, 15, 0.75);
  border-bottom: 1px solid var(--color-border);
  transition: background var(--transition);
}

.nav-brand {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-white);
  letter-spacing: 0.02em;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.35em;
  transition: opacity var(--transition-fast);
}

.nav-brand:hover {
  opacity: 0.85;
}

.nav-brand-text {
  font-size: 0.75em;
  font-weight: 600;
  color: var(--color-text-dim);
  letter-spacing: 0.04em;
  transition: color var(--transition-fast);
}

.nav-brand:hover .nav-brand-text {
  color: var(--color-text);
}

.nav-brand-sep {
  display: inline-block;
  width: 1px;
  height: 0.75em;
  background: rgba(74, 222, 128, 0.4);
  color: transparent;
  overflow: hidden;
  vertical-align: middle;
  user-select: none;
  transition: background var(--transition-fast);
}

.nav-brand:hover .nav-brand-sep {
  background: var(--color-primary);
}

.nav-brand-lab {
  font-family: 'Inter', 'Helvetica Neue', Arial, system-ui, sans-serif;
  font-size: 0.75em;
  font-weight: 700;
  color: var(--color-white);
  letter-spacing: 0.03em;
  background: linear-gradient(135deg, #4ade80 0%, #22d3ee 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav-links {
  display: flex;
  gap: 2rem;
  list-style: none;
}

.nav-links a {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--color-text-dim);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  transition: color var(--transition-fast);
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--color-primary);
  transition: width var(--transition);
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--color-primary);
}

.nav-links a:hover::after,
.nav-links a.active::after {
  width: 100%;
}

.nav-btn {
  font-family: 'Inter', 'Helvetica Neue', Arial, system-ui, sans-serif !important;
  font-weight: 600 !important;
  text-transform: none !important;
  letter-spacing: 0.02em !important;
  background: linear-gradient(135deg, #4ade80 0%, #22d3ee 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  transition: opacity var(--transition-fast);
}

.nav-btn::after {
  display: none !important;
}

.nav-btn:hover {
  opacity: 0.8;
  -webkit-text-fill-color: transparent;
}

/* ---- 汉堡菜单按钮（移动端） ---- */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
  z-index: 110;
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: all 0.3s ease;
}

.nav-toggle-active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle-active span:nth-child(2) {
  opacity: 0;
}

.nav-toggle-active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

body.nav-body-lock {
  overflow: hidden;
}

/* ---- 容器 ---- */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 2rem;
  position: relative;
  z-index: 1;
}

/* ---- Hero 区域 ---- */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
}

.hero-content {
  padding-top: var(--nav-height);
  max-width: 700px;
}

.hero-glass {
  display: inline-block;
  padding: 1.5rem 2rem;
  border-radius: var(--radius-lg);
  background: var(--glass-bg);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid var(--glass-border);
  position: relative;
  overflow: hidden;
}

.hero-glass::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: radial-gradient(400px circle at var(--mx, 50%) var(--my, 50%), rgba(74, 222, 128, 0.1), transparent 60%);
  opacity: 0;
  transition: opacity 0.4s ease;
  pointer-events: none;
  z-index: 0;
}

.hero-glass:hover::after {
  opacity: 1;
}

.hero-glass > * {
  position: relative;
  z-index: 1;
}

.hero-actions {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 2rem;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--color-primary);
  border: 1px solid var(--color-border-glow);
  background: var(--color-primary-dim);
  padding: 0.35rem 0.9rem;
  border-radius: 2rem;
  letter-spacing: 0.06em;
  margin-bottom: 2rem;
}

.hero-badge .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-primary);
  animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; box-shadow: 0 0 4px var(--color-primary); }
  50% { opacity: 0.4; box-shadow: 0 0 8px var(--color-primary); }
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 6vw, 5rem);
  font-weight: 600;
  line-height: 1.15;
  color: var(--color-white);
  margin-bottom: 1.25rem;
  letter-spacing: -0.02em;
}

.hero-title .highlight {
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--color-text-dim);
  letter-spacing: 0.04em;
  margin-bottom: 2rem;
}

.hero-cta {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--color-primary);
  border-radius: var(--radius);
  border: 1px solid var(--glass-border);
  background: transparent;
  padding: 0.75rem 2rem;
  letter-spacing: 0.06em;
  cursor: pointer;
  transition: all var(--transition);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  position: relative;
}

.hero-cta-outline {
  color: var(--color-primary);
  border-color: var(--glass-border);
  background: transparent;
}

.hero-cta-outline:hover {
  border-color: var(--glass-border-hover);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3), 0 0 16px rgba(74, 222, 128, 0.05);
  color: var(--color-primary);
}

.hero-cta::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: radial-gradient(400px circle at var(--mx, 50%) var(--my, 50%), rgba(74, 222, 128, 0.1), transparent 60%);
  opacity: 0;
  transition: opacity 0.4s ease;
  pointer-events: none;
}

.hero-cta:hover::after {
  opacity: 1;
}

.hero-cta:hover {
  border-color: var(--glass-border-hover);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3), 0 0 16px rgba(74, 222, 128, 0.05);
}

.hero-cta > * {
  position: relative;
  z-index: 1;
}

/* Hero 状态指示器 */
/* ---- 滚动提示 ---- */
.scroll-hint {
  position: absolute;
  bottom: 1rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.12em;
  color: var(--color-text-muted);
  animation: float 2s ease-in-out infinite;
}

.scroll-hint .line {
  width: 1px;
  height: 32px;
  background: linear-gradient(to bottom, var(--color-text-muted), transparent);
}

@keyframes float {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(8px); }
}

/* ---- 区域通用 ---- */
.section {
  padding: 4rem 0;
  min-height: 100vh;
  content-visibility: auto;
  contain-intrinsic-size: 100vh;
}

.section-header {
  text-align: center;
  margin-bottom: 1.5rem;
}

.section-tag {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--color-primary);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 0.4rem;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 600;
  color: var(--color-white);
  letter-spacing: -0.01em;
  line-height: 1.2;
}

.section-subtitle {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--color-text-dim);
  letter-spacing: 0.05em;
  margin-top: 0.3rem;
}

/* ---- 研究成果 — 现代简约大字体 + 底部卡片 ---- */
.research-container {
  display: flex;
  flex-direction: column;
  min-height: calc(100vh - 8rem);
}

.research-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.research-hero {
  padding: 3rem 0 2rem;
}

.research-badge {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--color-primary);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 1.25rem;
}

.badge-dot {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--color-primary);
  box-shadow: 0 0 8px var(--color-primary-dim);
}

.research-title {
  font-family: var(--font-display);
  font-size: clamp(3rem, 7vw, 5.5rem);
  font-weight: 700;
  color: var(--color-white);
  line-height: 1.0;
  letter-spacing: -0.03em;
  margin: 0 0 0.6rem 0;
  max-width: 750px;
}

.research-title .highlight {
  background: linear-gradient(135deg, #34d399, #22d3ee);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.research-sub {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--color-text-dim);
  letter-spacing: 0.04em;
  margin-bottom: 1.5rem;
  max-width: 600px;
}

.research-tags {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  margin-top: 1.5rem;
}

.research-dir-row {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  line-height: 1.5;
  color: var(--color-text-dim);
  letter-spacing: 0.02em;
  transition: color var(--transition);
}

.research-dir-row:hover {
  color: var(--color-text);
}

.dir-marker {
  flex-shrink: 0;
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--color-primary);
  opacity: 0.5;
}

/* ---- 研究成果轮播区域（底部） ---- */
.research-carousel-section {
  margin-top: -3rem;
  padding-bottom: 0.5rem;
}

.carousel-outer {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.carousel-wrap {
  flex: 1;
  overflow: hidden;
  min-width: 0;
}

.carousel-track {
  display: flex;
  gap: 0.5rem;
  align-items: stretch;
  transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  will-change: transform;
}

/* 大卡片 + 图片 */
.carousel-card {
  flex: 0 0 calc((100% - 0.5rem * 2) / 3);
  min-width: 0;
  border-radius: 12px;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  cursor: pointer;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transform: translateZ(0);
  backface-visibility: hidden;
}

.carousel-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 14px 36px rgba(0, 0, 0, 0.45);
  border-color: rgba(74,222,128,0.1);
}

.card-img-wrap {
  width: 100%;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  flex-shrink: 0;
}

.card-img-wrap .card-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.carousel-card:hover .card-image {
  transform: scale(1.08);
}

.carousel-card .card-body {
  padding: 0.7rem 0.8rem 0.8rem;
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  flex: 1;
}

.card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
}

.carousel-card .card-year {
  font-family: var(--font-mono);
  font-size: 0.55rem;
  color: var(--color-primary);
  letter-spacing: 0.06em;
  flex-shrink: 0;
}

.carousel-card .card-metric {
  font-family: var(--font-mono);
  font-size: 0.45rem;
  color: var(--color-accent-dim);
  letter-spacing: 0.04em;
  text-align: right;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.carousel-card .card-title {
  font-family: var(--font-display);
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--color-white);
  line-height: 1.3;
  display: -webkit-box;
  -webkit-line-clamp: 1;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.carousel-card .card-desc {
  font-size: 0.65rem;
  color: var(--color-text-muted);
  line-height: 1.45;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ---- 轮播按钮 ---- */
.carousel-btn {
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  color: var(--color-text-dim);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition);
  z-index: 2;
  position: relative;
  background: var(--glass-bg);
  -webkit-backdrop-filter: var(--glass-blur);
  backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
}

.carousel-btn::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background: radial-gradient(300px circle at var(--mx, 50%) var(--my, 50%), rgba(74, 222, 128, 0.12), transparent 60%);
  opacity: 0;
  transition: opacity 0.4s ease;
  pointer-events: none;
}

.carousel-btn:hover::after {
  opacity: 1;
}

.carousel-btn:hover {
  color: var(--color-primary);
  box-shadow: 0 0 16px rgba(74, 222, 128, 0.08);
}

.carousel-btn > * {
  position: relative;
  z-index: 1;
}

/* ---- 轮播指示点 ---- */
.carousel-dots {
  display: flex;
  gap: 0.5rem;
  justify-content: center;
  margin-top: 0.75rem;
}

.carousel-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-text-muted);
  cursor: pointer;
  transition: all var(--transition);
}

.carousel-dot.active {
  width: 24px;
  border-radius: 3px;
  background: var(--color-primary);
  box-shadow: 0 0 8px var(--color-primary-dim);
}

/* ---- 团队区域（四张分类大卡片）---- */
.team-cards {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.25rem;
  align-items: stretch;
}

.team-card {
  border-radius: var(--radius-lg);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition), background var(--transition);
  display: flex;
  flex-direction: column;
}

.team-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.4);
}

.team-card-header {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-primary);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 1.25rem 1.5rem 0.75rem;
  border-bottom: 1px solid var(--color-border);
}

.team-card-body {
  padding: 0.5rem 0;
  flex: 1;
}

/* ---- 导师组：照片位 + 详情大卡片 ---- */
.team-card-mentor .team-card-body {
  padding: 1rem;
}

.tm-mentor-grid {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  width: 100%;
}

.tm-mentor-block {
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.tm-photo-slot {
  display: inline-flex;
  border-radius: var(--radius);
  background: transparent;
  border: none;
  align-items: center;
  justify-content: center;
  margin-bottom: 0.75rem;
  overflow: hidden;
}

.tm-photo-img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: var(--radius);
  max-width: 140px;
}

.tm-mentor-block:hover .tm-photo-slot {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background: var(--color-primary-dim);
}

.tm-mentor-name {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--color-white);
  margin-bottom: 0.15rem;
}

.tm-mentor-role {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--color-text-muted);
  letter-spacing: 0.03em;
  margin-bottom: 0.5rem;
  line-height: 1.3;
}

.tm-mentor-block .tm-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  justify-content: center;
  margin-top: 0.4rem;
}

.tm-tag {
  display: inline-block;
  padding: 0.2rem 0.55rem;
  border-radius: 12px;
  font-family: var(--font-mono);
  font-size: 0.55rem;
  color: var(--color-primary);
  letter-spacing: 0.03em;
  background: var(--color-primary-dim);
  border: 1px solid var(--color-border-glow);
  white-space: nowrap;
}

/* ---- PI 详情区域 ---- */
.tm-pi-detail {
  text-align: left;
  padding-top: 0.5rem;
  border-top: 1px solid var(--color-border);
}

.tm-pi-bio {
  font-family: var(--font-sans);
  font-size: 0.85rem;
  line-height: 1.7;
  color: var(--color-text-dim);
  margin-bottom: 1rem;
}

.tm-section-title {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--color-primary);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 0.35rem;
  margin-top: 0.75rem;
}

.tm-section-title:first-child {
  margin-top: 0;
}

.tm-detail-row {
  font-family: var(--font-sans);
  font-size: 0.78rem;
  line-height: 1.5;
  color: var(--color-text-dim);
  padding: 0.2rem 0;
  padding-left: 0.5rem;
  border-left: 1px solid var(--color-border);
  margin-bottom: 0.25rem;
}

/* ---- 其他组行样式 ---- */
.team-member-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.6rem 1.5rem;
  transition: background var(--transition-fast);
}

.team-member-row:hover {
  background: var(--color-surface-hover);
}

.tm-avatar {
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-primary-dim), var(--color-accent-dim));
  border: 1.5px solid var(--color-border-glow);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-primary);
}

.tm-info {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.tm-name {
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-white);
  line-height: 1.3;
}

.tm-role {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  color: var(--color-text-muted);
  letter-spacing: 0.03em;
  line-height: 1.3;
  margin-top: 0.05rem;
}

.tm-field {
  flex-shrink: 0;
  font-family: var(--font-mono);
  font-size: 0.58rem;
  color: var(--color-accent);
  border: 1px solid var(--color-accent-dim);
  padding: 0.15rem 0.6rem;
  border-radius: 2rem;
  white-space: nowrap;
}

/* ---- 团队底部实验室信息 ---- */
.team-contact {
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid var(--color-border);
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem 2.5rem;
  justify-content: center;
}

.team-contact-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.82rem;
  color: var(--color-text-dim);
  line-height: 1.4;
}

.team-contact-item svg {
  flex-shrink: 0;
  color: var(--color-primary);
}

.team-contact-item a {
  color: var(--color-accent);
  transition: color var(--transition-fast);
}

.team-contact-item a:hover {
  color: var(--color-primary);
}

/* ---- 页脚 ---- */
.footer {
  border-top: 1px solid var(--color-border);
  padding: 2.5rem 0;
  text-align: center;
}

.footer-brand {
  font-family: 'Inter', 'Helvetica Neue', Arial, system-ui, sans-serif;
  font-size: 1rem;
  font-weight: 700;
  background: linear-gradient(135deg, #4ade80 0%, #22d3ee 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 0.3rem;
}

.footer-tag {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--color-text-muted);
  letter-spacing: 0.04em;
  margin-bottom: 0.5rem;
}

.footer-copy {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--color-text-muted);
  letter-spacing: 0.06em;
}

/* ---- 按钮 ---- */
.btn-outline {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--color-primary);
  padding: 0.6rem 1.5rem;
  border-radius: var(--radius);
  letter-spacing: 0.04em;
  cursor: pointer;
  transition: all var(--transition);
  margin-top: 2.5rem;
  position: relative;
  background: var(--glass-bg);
  -webkit-backdrop-filter: var(--glass-blur);
  backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
}

.btn-outline::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: radial-gradient(400px circle at var(--mx, 50%) var(--my, 50%), rgba(74, 222, 128, 0.1), transparent 60%);
  opacity: 0;
  transition: opacity 0.4s ease;
  pointer-events: none;
}

.btn-outline:hover::after {
  opacity: 1;
}

.btn-outline:hover {
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3), 0 0 16px rgba(74, 222, 128, 0.05);
}

.btn-outline > * {
  position: relative;
  z-index: 1;
}

/* ---- 导航栏点击楼层跳转逻辑已由 CSS scroll-snap 接管 ---- */

.btn-center {
  text-align: center;
}

/* ---- 渐入动画 ---- */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---- 楼层指示器 ---- */
.floor-indicator {
  position: fixed;
  right: 1.5rem;
  top: 50%;
  transform: translateY(-50%);
  z-index: 90;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
}

.floor-dot {
  position: relative;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.25rem 0;
  transition: all var(--transition);
}

.dot-inner {
  display: block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-text-muted);
  border: 1px solid transparent;
  transition: all var(--transition);
  flex-shrink: 0;
}

.floor-dot:hover .dot-inner {
  background: var(--color-primary);
  box-shadow: 0 0 12px var(--color-primary-dim);
}

.floor-dot.active .dot-inner {
  width: 12px;
  height: 12px;
  background: var(--color-primary);
  border-color: var(--color-primary);
  box-shadow: 0 0 16px rgba(74, 222, 128, 0.4);
}

.dot-label {
  position: absolute;
  right: calc(100% + 1rem);
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--color-text-muted);
  white-space: nowrap;
  opacity: 0;
  transition: all var(--transition);
  letter-spacing: 0.04em;
  pointer-events: none;
}

.floor-dot:hover .dot-label {
  opacity: 1;
  color: var(--color-primary);
}

.floor-dot.active .dot-label {
  opacity: 1;
  color: var(--color-primary);
}

/* ---- 响应式 ---- */
@media (max-width: 1024px) {
  .team-cards {
    grid-template-columns: repeat(2, 1fr);
  }

  .research-title {
    font-size: clamp(2.5rem, 6vw, 4rem);
  }
}

@media (max-width: 768px) {
  .nav {
    padding: 0 1rem;
  }

  .nav-toggle {
    display: flex;
  }

  .nav-links {
    position: fixed;
    top: var(--nav-height, 64px);
    left: 0;
    right: 0;
    max-height: calc(100vh - var(--nav-height, 64px));
    flex-direction: column;
    justify-content: flex-start;
    align-items: center;
    gap: 1.25rem;
    background: rgba(10, 14, 15, 0.95);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
    z-index: 101;
    border-top: 1px solid var(--color-border);
    padding: 3rem 1rem 2rem;
    margin: 0;
    list-style: none;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
    overflow-y: auto;
    display: flex;
  }

  .nav-links li {
    margin: 0;
    padding: 0;
  }

  .nav-links.nav-open {
    opacity: 1;
    pointer-events: auto;
  }

  .nav-links a {
    font-size: 1.2rem;
    color: var(--color-text);
    font-weight: 500;
    letter-spacing: 0.06em;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius);
    transition: all var(--transition-fast);
  }

  .nav-links a:hover,
  .nav-links a.active {
    color: var(--color-primary);
    background: rgba(74, 222, 128, 0.1);
  }

  .container {
    padding: 0 1.25rem;
  }

  .section {
    height: 100vh;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    padding-top: var(--nav-height);
  }

  .hero {
    min-height: 100vh;
    height: 100vh;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
  }

  .hero-content {
    max-width: 100%;
  }

  .hero-glass {
    padding: 1.2rem 1.25rem;
  }

  .hero-title {
    font-size: clamp(1.8rem, 5vw, 2.5rem);
  }

  .hero-subtitle {
    font-size: 0.72rem;
  }

  .hero-actions {
    flex-direction: column;
    gap: 0.6rem;
    align-items: flex-start;
  }

  .hero-cta {
    width: 100%;
    justify-content: center;
    padding: 0.65rem 1.5rem;
  }

  .scroll-hint {
    position: fixed;
    bottom: 1rem;
  }

  .research-container {
    min-height: auto;
  }

  .research-content {
    flex: 0 1 auto;
    justify-content: flex-start;
  }

  .research-hero {
    padding: 1.5rem 0 1rem;
  }

  .research-title {
    font-size: clamp(2rem, 6vw, 3rem);
  }

  .research-dir-row {
    font-size: 0.8rem;
    line-height: 1.4;
  }

  .research-tags {
    gap: 0.4rem;
  }

  .research-carousel-section {
    margin-top: 0.5rem;
    padding-bottom: 0;
  }

  .carousel-track {
    gap: 0;
  }

  .carousel-card {
    flex: 0 0 100%;
  }

  .carousel-card .card-body {
    padding: 0.4rem 0.5rem 0.5rem;
    gap: 0.15rem;
  }

  .carousel-card .card-title {
    font-size: 0.7rem;
  }

  .carousel-card .card-desc {
    font-size: 0.55rem;
    -webkit-line-clamp: 2;
  }

  .carousel-card .card-top {
    gap: 0.3rem;
  }

  .carousel-card .card-year {
    font-size: 0.55rem;
    padding: 0.05rem 0.35rem;
  }

  .carousel-card .card-metric {
    font-size: 0.5rem;
  }

  .card-img-wrap {
    aspect-ratio: 16 / 10;
  }

  .team-cards {
    grid-template-columns: repeat(2, 1fr);
    gap: 0.75rem;
  }

  .team-card-header {
    padding: 0.75rem 1rem 0.5rem;
    font-size: 0.65rem;
  }

  .team-card-body {
    padding: 0.25rem 0;
  }

  .team-member-row {
    padding: 0.4rem 0.75rem;
    gap: 0.5rem;
  }

  .tm-avatar {
    width: 28px;
    height: 28px;
    font-size: 0.75rem;
  }

  .tm-name {
    font-size: 0.8rem;
  }

  .tm-role {
    font-size: 0.55rem;
  }

  .tm-field {
    font-size: 0.5rem;
    padding: 0.1rem 0.4rem;
  }

  .team-card-mentor .team-card-body {
    padding: 0.75rem;
  }

  .tm-pi-bio {
    font-size: 0.75rem;
  }

  .tm-detail-row {
    font-size: 0.7rem;
  }

  .team-contact {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.6rem;
    padding: 1rem;
    margin-top: 1rem;
  }

  .team-contact-item {
    font-size: 0.65rem;
    gap: 0.4rem;
  }

  .team-contact-item svg {
    width: 12px;
    height: 12px;
    flex-shrink: 0;
  }

  .footer {
    padding: 1.5rem 0;
  }

  .footer-brand {
    font-size: 1rem;
  }

  .floor-indicator {
    right: 0.6rem;
    gap: 0.5rem;
  }

  .dot-label {
    display: none;
  }

  .dot-inner {
    width: 6px;
    height: 6px;
  }

  .floor-dot.active .dot-inner {
    width: 10px;
    height: 10px;
  }
}

@media (max-width: 480px) {
  .nav-brand {
    font-size: 1rem;
  }

  .nav-links a {
    font-size: 1rem;
  }

  .hero-title {
    font-size: 1.6rem;
  }

  .hero-glass {
    padding: 1rem 1rem;
  }

  .hero-subtitle {
    font-size: 0.65rem;
  }

  .hero-badge {
    font-size: 0.6rem;
    padding: 0.25rem 0.7rem;
    margin-bottom: 1.25rem;
  }

  .section-title {
    font-size: 1.2rem;
  }

  .section-subtitle {
    font-size: 0.6rem;
  }

  .research-title {
    font-size: 1.8rem;
  }

  .research-dir-row {
    font-size: 0.7rem;
    gap: 0.4rem;
  }

  .dir-marker {
    width: 3px;
    height: 3px;
  }

  .research-carousel-section {
    margin-top: 0.3rem;
  }

  .carousel-track {
    gap: 0;
  }

  .carousel-card {
    flex: 0 0 100%;
  }

  .carousel-card .card-body {
    padding: 0.3rem 0.4rem 0.4rem;
  }

  .carousel-card .card-title {
    font-size: 0.65rem;
  }

  .carousel-card .card-desc {
    font-size: 0.5rem;
  }

  .carousel-btn {
    display: none;
  }

  .team-cards {
    grid-template-columns: 1fr;
    gap: 0.75rem;
  }

  .team-contact {
    padding: 0.75rem;
  }

  .tm-photo-img {
    max-width: 100px;
  }

  .tm-section-title {
    font-size: 0.55rem;
  }

  .floor-indicator {
    right: 0.4rem;
  }
}