:root {
  --bg-dark: #0a0e1a;
  --bg-dark-2: #111827;
  --bg-dark-3: #1a1f2e;
  --bg-light: #f8f9fc;
  --bg-card: #ffffff;
  --ink: #1a1a2e;
  --ink-2: #3d3d56;
  --ink-3: #8b8ba0;
  --ink-w: #ffffff;
  --ink-w2: #c9d1d9;
  --ink-w3: #8b949e;
  --accent: #00b37e;
  --accent-2: #0098b8;
  --accent-3: #7c5cff;
  --accent-grad: linear-gradient(135deg, #00e5a0 0%, #00b8d4 60%, #7c5cff 100%);
  --mozi-color: #667eea;
  --mox3d-color: #00b37e;
  --eirbot-color: #f59e0b;
  --line: rgba(0,0,0,.08);
  --line-dark: rgba(255,255,255,.08);
  --radius: 12px;
  --radius-lg: 20px;
  --shadow: 0 4px 24px rgba(0,0,0,.06);
  --shadow-lg: 0 12px 48px rgba(0,0,0,.12);
  --transition: .3s cubic-bezier(.4,0,.2,1);
  --max-w: 1200px;
  --nav-h: 72px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: "HarmonyOS Sans SC", -apple-system, BlinkMacSystemFont, "PingFang SC", "Helvetica Neue", Arial, sans-serif;
  color: var(--ink);
  background: var(--bg-dark);
  line-height: 1.7;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; transition: color var(--transition); }
img { max-width: 100%; display: block; }
ul, ol { list-style: none; }

.container {
  width: 100%;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 2rem;
}

/* ─── Reveal animation ─── */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity .8s cubic-bezier(.4,0,.2,1), transform .8s cubic-bezier(.4,0,.2,1);
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}
.reveal-delay-1 { transition-delay: .1s; }
.reveal-delay-2 { transition-delay: .2s; }
.reveal-delay-3 { transition-delay: .3s; }
.reveal-delay-4 { transition-delay: .4s; }

/* ═══════════════════════════════════════
   NAV
   ═══════════════════════════════════════ */
.nav {
  position: fixed; top: 0; left: 0; right: 0;
  z-index: 1000;
  height: var(--nav-h);
  display: flex; align-items: center;
  transition: background var(--transition), box-shadow var(--transition), backdrop-filter var(--transition);
}
.nav.scrolled {
  background: rgba(10,14,26,.92);
  backdrop-filter: blur(20px);
  box-shadow: 0 1px 0 var(--line-dark);
}
.nav .container {
  display: flex; align-items: center; justify-content: space-between;
}
.nav-brand {
  display: flex; align-items: center; gap: 10px;
  font-weight: 700; font-size: 1.1rem; color: var(--ink-w);
}
.nav-logo {
  width: 36px; height: 36px; border-radius: 50%;
  background: var(--accent-grad);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.1rem; font-weight: 700; color: var(--bg-dark);
}
.nav-links {
  display: flex; align-items: center; gap: 2rem;
}
.nav-links a {
  color: var(--ink-w3);
  font-size: .9rem; font-weight: 500;
  transition: color var(--transition);
  position: relative;
}
.nav-links a:hover, .nav-links a.active { color: var(--ink-w); }
.nav-links a::after {
  content: ''; position: absolute;
  bottom: -4px; left: 0; width: 0; height: 2px;
  background: var(--accent-grad);
  transition: width var(--transition);
}
.nav-links a:hover::after, .nav-links a.active::after { width: 100%; }
.nav-cta {
  padding: .5rem 1.2rem;
  border-radius: 8px;
  background: var(--accent);
  color: var(--bg-dark) !important;
  font-weight: 600;
  font-size: .85rem;
  transition: transform var(--transition), box-shadow var(--transition);
}
.nav-cta:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(0,179,126,.3);
}
.nav-cta::after { display: none !important; }

.nav-toggle {
  display: none;
  flex-direction: column; gap: 5px;
  cursor: pointer; padding: 4px;
}
.nav-toggle span {
  width: 22px; height: 2px;
  background: var(--ink-w);
  border-radius: 2px;
  transition: var(--transition);
}

/* ═══════════════════════════════════════
   SECTION BASE
   ═══════════════════════════════════════ */
.section {
  padding: 7rem 0;
  position: relative;
}
.section-dark { background: var(--bg-dark); color: var(--ink-w); }
.section-dark-2 { background: var(--bg-dark-2); color: var(--ink-w); }
.section-light { background: var(--bg-light); color: var(--ink); }
.section-white { background: var(--bg-card); color: var(--ink); }

.section-eyebrow {
  font-size: .75rem; font-weight: 700;
  letter-spacing: 3px; text-transform: uppercase;
  color: var(--accent); opacity: .8;
  margin-bottom: 1rem;
}
.section-title {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 700; line-height: 1.25;
  margin-bottom: 1rem;
}
.section-desc {
  font-size: 1.05rem; line-height: 1.8;
  max-width: 680px;
}
.section-dark .section-desc, .section-dark-2 .section-desc { color: var(--ink-w2); }
.section-light .section-desc, .section-white .section-desc { color: var(--ink-2); }

.section-header {
  text-align: center;
  margin-bottom: 4rem;
}
.section-header .section-desc {
  margin: 0 auto;
}

.gradient-text {
  background: var(--accent-grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* ═══════════════════════════════════════
   HERO
   ═══════════════════════════════════════ */
.hero {
  min-height: 100vh;
  display: flex; align-items: center; justify-content: center;
  text-align: center;
  padding-top: var(--nav-h);
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(ellipse at 30% 20%, rgba(0,229,160,.06) 0%, transparent 50%),
    radial-gradient(ellipse at 70% 80%, rgba(124,92,255,.05) 0%, transparent 50%),
    radial-gradient(ellipse at 50% 50%, rgba(0,184,212,.03) 0%, transparent 60%),
    var(--bg-dark);
}
.hero-grid {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.02) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
}
.hero-glow {
  position: absolute;
  width: 600px; height: 600px;
  border-radius: 50%;
  filter: blur(120px);
  opacity: .15;
  pointer-events: none;
}
.hero-glow-1 { top: -200px; left: -100px; background: #00e5a0; }
.hero-glow-2 { bottom: -200px; right: -100px; background: #7c5cff; }

.hero-content { position: relative; z-index: 1; max-width: 860px; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  padding: .45rem 1rem;
  border: 1px solid rgba(255,255,255,.1);
  border-radius: 99px;
  font-size: .8rem; color: var(--ink-w2);
  margin-bottom: 2rem;
  backdrop-filter: blur(8px);
  background: rgba(255,255,255,.03);
}
.hero-badge-dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--accent);
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; box-shadow: 0 0 0 0 rgba(0,179,126,.4); }
  50% { opacity: .7; box-shadow: 0 0 0 6px rgba(0,179,126,0); }
}
.hero h1 {
  font-size: clamp(2.4rem, 6vw, 4rem);
  font-weight: 700; line-height: 1.15;
  color: var(--ink-w);
  margin-bottom: 1.5rem;
  letter-spacing: -1px;
}
.hero-sub {
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: var(--ink-w3);
  line-height: 1.8;
  max-width: 600px;
  margin: 0 auto 2.5rem;
}
.hero-actions {
  display: flex; gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: .75rem 1.8rem;
  border-radius: 10px;
  font-size: .95rem; font-weight: 600;
  cursor: pointer; border: none;
  transition: transform var(--transition), box-shadow var(--transition);
}
.btn:hover { transform: translateY(-2px); }
.btn-primary {
  background: var(--accent);
  color: var(--bg-dark);
}
.btn-primary:hover { box-shadow: 0 8px 24px rgba(0,179,126,.25); }
.btn-ghost {
  background: rgba(255,255,255,.06);
  color: var(--ink-w);
  border: 1px solid rgba(255,255,255,.12);
}
.btn-ghost:hover {
  background: rgba(255,255,255,.1);
  box-shadow: 0 8px 24px rgba(0,0,0,.2);
}
.btn-dark {
  background: var(--bg-dark);
  color: var(--ink-w);
}
.btn-dark:hover { box-shadow: 0 8px 24px rgba(0,0,0,.3); }

.hero-stats {
  display: flex; justify-content: center; gap: 3rem;
  margin-top: 4rem;
  padding-top: 2.5rem;
  border-top: 1px solid rgba(255,255,255,.06);
}
.hero-stat { text-align: center; }
.hero-stat-num {
  font-size: 2rem; font-weight: 700;
  background: var(--accent-grad);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero-stat-label { font-size: .8rem; color: var(--ink-w3); margin-top: 4px; }

/* ═══════════════════════════════════════
   ABOUT PREVIEW (首页简介)
   ═══════════════════════════════════════ */
.about-preview {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}
.about-preview-text .section-title { text-align: left; }
.about-preview-text .section-desc { max-width: none; }
.about-highlight {
  padding: 2rem;
  border-radius: var(--radius-lg);
  background: var(--bg-card);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}
.about-quote {
  font-size: 1.1rem; font-weight: 500; line-height: 1.8;
  color: var(--ink);
  border-left: 3px solid var(--accent);
  padding-left: 1.2rem;
  margin-bottom: 1.5rem;
}
.about-info-grid {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 1rem;
}
.about-info-item {
  padding: 1rem;
  border-radius: var(--radius);
  background: var(--bg-light);
}
.about-info-label { font-size: .75rem; color: var(--ink-3); margin-bottom: 4px; }
.about-info-value { font-size: .9rem; font-weight: 600; color: var(--ink); }

/* ═══════════════════════════════════════
   PRODUCTS GRID
   ═══════════════════════════════════════ */
.products-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}
.product-card {
  padding: 2.5rem 2rem;
  border-radius: var(--radius-lg);
  background: var(--bg-dark-3);
  border: 1px solid rgba(255,255,255,.06);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  position: relative;
  overflow: hidden;
}
.product-card::before {
  content: '';
  position: absolute; top: 0; left: 0; right: 0;
  height: 3px;
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  opacity: 0;
  transition: opacity var(--transition);
}
.product-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 16px 48px rgba(0,0,0,.3);
  border-color: rgba(255,255,255,.1);
}
.product-card:hover::before { opacity: 1; }

.product-card.mozi::before { background: linear-gradient(90deg, #667eea, #764ba2); }
.product-card.mox3d::before { background: linear-gradient(90deg, #00e5a0, #00b8d4); }
.product-card.eirbot::before { background: linear-gradient(90deg, #f59e0b, #ef4444); }

.product-icon {
  width: 56px; height: 56px;
  border-radius: 14px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.5rem; font-weight: 700;
  margin-bottom: 1.5rem;
}
.product-card.mozi .product-icon { background: rgba(102,126,234,.15); color: #667eea; }
.product-card.mox3d .product-icon { background: rgba(0,179,126,.15); color: #00b37e; }
.product-card.eirbot .product-icon { background: rgba(245,158,11,.15); color: #f59e0b; }

.product-badge {
  display: inline-block;
  padding: .2rem .6rem;
  border-radius: 6px;
  font-size: .7rem; font-weight: 600;
  margin-bottom: 1rem;
}
.product-card.mozi .product-badge { background: rgba(102,126,234,.12); color: #667eea; }
.product-card.mox3d .product-badge { background: rgba(0,179,126,.12); color: #00b37e; }
.product-card.eirbot .product-badge { background: rgba(245,158,11,.12); color: #f59e0b; }

.product-name {
  font-size: 1.4rem; font-weight: 700;
  margin-bottom: .3rem; color: var(--ink-w);
}
.product-name-cn {
  font-size: .85rem; color: var(--ink-w3);
  margin-bottom: 1rem;
}
.product-slogan {
  font-size: .95rem; color: var(--ink-w2);
  line-height: 1.7;
  margin-bottom: 1.5rem;
  min-height: 3.4em;
}
.product-features {
  display: flex; flex-direction: column; gap: .6rem;
  margin-bottom: 1.5rem;
}
.product-feature {
  display: flex; align-items: flex-start; gap: 8px;
  font-size: .85rem; color: var(--ink-w3);
}
.product-feature::before {
  content: '→';
  color: var(--accent);
  font-weight: 600;
  flex-shrink: 0;
}
.product-link {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: .85rem; font-weight: 600;
  color: var(--accent);
  transition: gap var(--transition);
}
.product-link:hover { gap: 10px; }

.products-grid.scene-grid {
  grid-template-columns: repeat(4, 1fr);
}

/* ═══════════════════════════════════════
   DOGFOODING / FLYWHEEL
   ═══════════════════════════════════════ */
.flywheel-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}
.flywheel-visual {
  padding: 3rem;
  border-radius: var(--radius-lg);
  background: var(--bg-dark-3);
  border: 1px solid rgba(255,255,255,.06);
  position: relative;
}
.flywheel-ring {
  width: 320px; height: 320px;
  margin: 0 auto;
  border-radius: 50%;
  border: 2px dashed rgba(255,255,255,.1);
  position: relative;
  display: flex; align-items: center; justify-content: center;
  animation: spin-slow 30s linear infinite;
}
@keyframes spin-slow { from { transform: rotate(0); } to { transform: rotate(360deg); } }

.flywheel-center {
  animation: spin-slow 30s linear infinite reverse;
  text-align: center;
}
.flywheel-center-label {
  font-size: .7rem; color: var(--accent); font-weight: 600;
  letter-spacing: 2px;
}
.flywheel-center-text {
  font-size: 1.2rem; font-weight: 700; color: var(--ink-w);
  margin-top: 4px;
}

.flywheel-node {
  position: absolute;
  width: 80px; height: 80px;
  border-radius: 50%;
  background: var(--bg-dark-2);
  border: 1px solid rgba(255,255,255,.1);
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  font-size: .65rem; color: var(--ink-w2);
  text-align: center;
  animation: spin-slow 30s linear infinite reverse;
}
.flywheel-node-icon { font-size: 1.2rem; margin-bottom: 2px; }
.flywheel-node:nth-child(2) { top: -40px; left: 50%; transform: translateX(-50%); }
.flywheel-node:nth-child(3) { top: 50%; right: -40px; transform: translateY(-50%); }
.flywheel-node:nth-child(4) { bottom: -40px; left: 50%; transform: translateX(-50%); }
.flywheel-node:nth-child(5) { top: 50%; left: -40px; transform: translateY(-50%); }

.flywheel-points { margin-top: 2rem; }
.flywheel-point {
  display: flex; gap: 1rem;
  padding: 1rem 0;
  border-bottom: 1px solid rgba(255,255,255,.06);
}
.flywheel-point:last-child { border-bottom: none; }
.flywheel-point-num {
  width: 28px; height: 28px;
  border-radius: 50%;
  background: rgba(0,179,126,.12);
  color: var(--accent);
  font-size: .75rem; font-weight: 700;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.flywheel-point-text {
  font-size: .9rem; color: var(--ink-w2); line-height: 1.6;
}
.flywheel-point-text strong { color: var(--ink-w); }

/* ═══════════════════════════════════════
   SYNERGY / ARCHITECTURE
   ═══════════════════════════════════════ */
.synergy-diagram {
  max-width: 800px;
  margin: 0 auto 3rem;
  padding: 3rem 2rem;
  border-radius: var(--radius-lg);
  background: rgba(255,255,255,.02);
  border: 1px solid var(--line);
}
.synergy-top {
  text-align: center;
  padding: 1.2rem 2rem;
  border-radius: var(--radius);
  background: rgba(0,179,126,.08);
  border: 1px solid rgba(0,179,126,.15);
  margin-bottom: 2rem;
}
.synergy-top-label { font-size: .7rem; color: var(--accent); letter-spacing: 2px; margin-bottom: 4px; }
.synergy-top-name { font-size: 1.1rem; font-weight: 700; }

.synergy-connector {
  width: 2px; height: 40px;
  background: rgba(255,255,255,.1);
  margin: 0 auto;
  position: relative;
}
.synergy-connector::after {
  content: '▼'; position: absolute;
  bottom: -10px; left: 50%; transform: translateX(-50%);
  font-size: .6rem; color: var(--ink-w3);
}

.synergy-mozi {
  text-align: center;
  padding: 1.5rem 2rem;
  border-radius: var(--radius);
  background: rgba(102,126,234,.08);
  border: 1px solid rgba(102,126,234,.15);
  margin: 1.5rem 0;
}
.synergy-mozi-name { font-size: 1.2rem; font-weight: 700; color: #667eea; }
.synergy-mozi-desc { font-size: .85rem; color: var(--ink-w2); margin-top: 6px; }

.synergy-branches {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 1rem; margin-top: 1.5rem;
}
.synergy-branch {
  padding: 1.2rem;
  border-radius: var(--radius);
  text-align: center;
}
.synergy-branch.mox3d { background: rgba(0,179,126,.06); border: 1px solid rgba(0,179,126,.12); }
.synergy-branch.eirbot { background: rgba(245,158,11,.06); border: 1px solid rgba(245,158,11,.12); }
.synergy-branch-name { font-weight: 700; font-size: .95rem; }
.synergy-branch.mox3d .synergy-branch-name { color: var(--mox3d-color); }
.synergy-branch.eirbot .synergy-branch-name { color: var(--eirbot-color); }
.synergy-branch-desc { font-size: .8rem; color: var(--ink-w3); margin-top: 4px; }

.synergy-cards {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin-top: 2rem;
}
.synergy-card {
  padding: 1.5rem;
  border-radius: var(--radius);
  background: rgba(255,255,255,.03);
  border: 1px solid rgba(255,255,255,.06);
  text-align: center;
}
.synergy-card-num { font-size: 1.8rem; font-weight: 700; color: var(--accent); }
.synergy-card-text { font-size: .85rem; color: var(--ink-w2); margin-top: 6px; line-height: 1.5; }

/* ═══════════════════════════════════════
   MULTIMODAL
   ═══════════════════════════════════════ */
.multimodal-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}
.multimodal-demo {
  padding: 1.5rem;
  border-radius: var(--radius-lg);
  background: var(--bg-dark-3);
  border: 1px solid rgba(255,255,255,.08);
}
.demo-toolbar {
  display: flex; align-items: center; gap: 8px;
  padding-bottom: 1rem;
  border-bottom: 1px solid rgba(255,255,255,.06);
  margin-bottom: 1rem;
}
.demo-dot { width: 10px; height: 10px; border-radius: 50%; }
.demo-dot:nth-child(1) { background: #ef4444; }
.demo-dot:nth-child(2) { background: #f59e0b; }
.demo-dot:nth-child(3) { background: #22c55e; }
.demo-toolbar-title {
  margin-left: 8px;
  font-size: .75rem; color: var(--ink-w3);
}

.demo-messages { display: flex; flex-direction: column; gap: 1rem; }
.demo-msg {
  padding: .8rem 1rem;
  border-radius: 10px;
  font-size: .82rem; line-height: 1.6;
  max-width: 85%;
}
.demo-msg-user {
  background: rgba(102,126,234,.15);
  color: var(--ink-w2);
  align-self: flex-end;
  border-bottom-right-radius: 4px;
}
.demo-msg-ai {
  background: rgba(0,179,126,.1);
  color: var(--ink-w2);
  border-bottom-left-radius: 4px;
}
.demo-msg-file {
  display: inline-flex; align-items: center; gap: 6px;
  padding: .4rem .8rem;
  border-radius: 6px;
  background: rgba(255,255,255,.06);
  font-size: .75rem; color: var(--ink-w3);
  margin-top: 6px;
}
.demo-3d-placeholder {
  width: 100%; height: 100px;
  border-radius: 8px;
  background: linear-gradient(135deg, rgba(0,179,126,.08), rgba(0,184,212,.08));
  border: 1px dashed rgba(0,179,126,.2);
  display: flex; align-items: center; justify-content: center;
  font-size: .75rem; color: var(--ink-w3);
  margin-top: 8px;
}

.multimodal-features { display: flex; flex-direction: column; gap: 1.5rem; }
.multimodal-feature {
  display: flex; gap: 1rem;
  padding: 1.2rem;
  border-radius: var(--radius);
  background: rgba(255,255,255,.03);
  border: 1px solid rgba(255,255,255,.06);
  transition: border-color var(--transition);
}
.multimodal-feature:hover { border-color: rgba(0,179,126,.2); }
.multimodal-feature-icon {
  width: 40px; height: 40px;
  border-radius: 10px;
  background: rgba(0,179,126,.1);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.1rem;
  flex-shrink: 0;
}
.multimodal-feature-title { font-weight: 600; font-size: .9rem; color: var(--ink-w); margin-bottom: 4px; }
.multimodal-feature-desc { font-size: .8rem; color: var(--ink-w3); line-height: 1.5; }

/* ═══════════════════════════════════════
   VALUES
   ═══════════════════════════════════════ */
.values-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 1rem;
}
.value-card {
  padding: 1.8rem 1.2rem;
  border-radius: var(--radius);
  background: var(--bg-card);
  border: 1px solid var(--line);
  text-align: center;
  transition: transform var(--transition), box-shadow var(--transition);
}
.value-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}
.value-num {
  width: 36px; height: 36px;
  border-radius: 50%;
  background: var(--accent);
  color: var(--bg-dark);
  font-size: .85rem; font-weight: 700;
  display: flex; align-items: center; justify-content: center;
  margin: 0 auto 1rem;
}
.value-name { font-size: .95rem; font-weight: 700; color: var(--ink); margin-bottom: .5rem; }
.value-desc { font-size: .8rem; color: var(--ink-3); line-height: 1.5; }

/* ═══════════════════════════════════════
   FOUNDER STORY / TIMELINE
   ═══════════════════════════════════════ */
.timeline {
  max-width: 800px;
  margin: 0 auto;
  position: relative;
  padding-left: 40px;
}
.timeline::before {
  content: '';
  position: absolute;
  left: 15px; top: 0; bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, var(--accent), var(--accent-3));
  border-radius: 2px;
}
.timeline-item {
  position: relative;
  padding-bottom: 3rem;
}
.timeline-item:last-child { padding-bottom: 0; }
.timeline-dot {
  position: absolute;
  left: -33px; top: 4px;
  width: 14px; height: 14px;
  border-radius: 50%;
  background: var(--accent);
  border: 3px solid var(--bg-dark);
  z-index: 1;
}
.timeline-step {
  font-size: .7rem; font-weight: 700;
  color: var(--accent); letter-spacing: 2px;
  margin-bottom: .4rem;
}
.timeline-title {
  font-size: 1.1rem; font-weight: 700;
  color: var(--ink-w);
  margin-bottom: .5rem;
}
.timeline-desc {
  font-size: .9rem; color: var(--ink-w2);
  line-height: 1.7;
}

/* ═══════════════════════════════════════
   MISSION/VISION
   ═══════════════════════════════════════ */
.mv-cards {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 2rem;
}
.mv-card {
  padding: 2.5rem;
  border-radius: var(--radius-lg);
  position: relative;
  overflow: hidden;
}
.mv-card-mission {
  background: linear-gradient(135deg, rgba(0,179,126,.08), rgba(0,184,212,.04));
  border: 1px solid rgba(0,179,126,.15);
}
.mv-card-vision {
  background: linear-gradient(135deg, rgba(124,92,255,.08), rgba(102,126,234,.04));
  border: 1px solid rgba(124,92,255,.15);
}
.mv-label {
  font-size: .7rem; font-weight: 700;
  letter-spacing: 3px;
  color: var(--accent);
  margin-bottom: 1rem;
}
.mv-card-vision .mv-label { color: var(--accent-3); }
.mv-text {
  font-size: 1.3rem; font-weight: 700;
  line-height: 1.5; color: var(--ink-w);
}

/* ═══════════════════════════════════════
   CTA SECTION
   ═══════════════════════════════════════ */
.cta-section {
  text-align: center;
  padding: 6rem 0;
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(ellipse at 50% 50%, rgba(0,229,160,.06), transparent 60%),
    var(--bg-dark);
}
.cta-section h2 {
  font-size: clamp(1.6rem, 4vw, 2.4rem);
  font-weight: 700;
  color: var(--ink-w);
  margin-bottom: 1rem;
}
.cta-section p {
  font-size: 1rem; color: var(--ink-w3);
  margin-bottom: 2rem;
}

/* ═══════════════════════════════════════
   FOOTER
   ═══════════════════════════════════════ */
.footer {
  background: #060912;
  padding: 4rem 0 2rem;
  border-top: 1px solid rgba(255,255,255,.04);
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr 1fr;
  gap: 2rem;
  margin-bottom: 3rem;
}
.footer-brand-desc {
  font-size: .85rem; color: var(--ink-w3);
  line-height: 1.7;
  margin-top: 1rem;
  max-width: 280px;
}
.footer-col-title {
  font-size: .75rem; font-weight: 700;
  letter-spacing: 2px; color: var(--ink-w3);
  margin-bottom: 1rem;
}
.footer-col a {
  display: block;
  font-size: .85rem; color: var(--ink-w3);
  padding: .3rem 0;
  transition: color var(--transition);
}
.footer-col a:hover { color: var(--accent); }

.footer-bottom {
  display: flex; justify-content: space-between; align-items: center;
  padding-top: 2rem;
  border-top: 1px solid rgba(255,255,255,.06);
  font-size: .78rem; color: var(--ink-w3);
}
.footer-bottom a { color: var(--ink-w3); }
.footer-bottom a:hover { color: var(--accent); }

/* ═══════════════════════════════════════
   AI EMPLOYEES PREVIEW
   ═══════════════════════════════════════ */
.employees-scroll {
  display: flex; gap: 1rem;
  overflow-x: auto;
  padding-bottom: 1rem;
  scrollbar-width: none;
}
.employees-scroll::-webkit-scrollbar { display: none; }
.employee-chip {
  flex-shrink: 0;
  padding: .8rem 1.2rem;
  border-radius: var(--radius);
  background: var(--bg-card);
  border: 1px solid var(--line);
  display: flex; align-items: center; gap: .6rem;
  transition: transform var(--transition), box-shadow var(--transition);
}
.employee-chip:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}
.employee-avatar {
  width: 36px; height: 36px;
  border-radius: 50%;
  background: var(--accent-grad);
  display: flex; align-items: center; justify-content: center;
  font-size: .85rem; font-weight: 700; color: var(--bg-dark);
}
.employee-name { font-size: .85rem; font-weight: 600; }
.employee-role { font-size: .72rem; color: var(--ink-3); }

/* ═══════════════════════════════════════
   CONTACT SECTION
   ═══════════════════════════════════════ */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}
.contact-card {
  padding: 1.5rem;
  border-radius: var(--radius);
  background: rgba(255,255,255,.03);
  border: 1px solid rgba(255,255,255,.06);
  text-align: center;
}
.contact-card-icon {
  font-size: 1.5rem;
  margin-bottom: .8rem;
}
.contact-card-label {
  font-size: .75rem; color: var(--ink-w3);
  margin-bottom: .3rem;
}
.contact-card-value {
  font-size: .9rem; font-weight: 600; color: var(--ink-w);
}

/* ═══════════════════════════════════════
   RESEARCH / 学术感版式（Anthropic-style）
   ═══════════════════════════════════════ */
.section-research {
  padding: 9rem 0;
  background: #050810;
}
.research-header {
  max-width: 800px;
  margin: 0 auto 5rem;
}
.research-header .section-title {
  font-size: clamp(2rem, 4vw, 3rem);
  letter-spacing: -0.5px;
  margin-bottom: 1.5rem;
}
.research-header .section-desc {
  font-size: 1.1rem;
  line-height: 1.85;
  color: var(--ink-w2);
  max-width: 720px;
}

.research-list {
  max-width: 960px;
  margin: 0 auto;
}
.research-item {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 2.5rem;
  padding: 3rem 0;
  border-top: 1px solid rgba(255,255,255,.06);
  transition: background var(--transition);
}
.research-item:last-child { border-bottom: 1px solid rgba(255,255,255,.06); }
.research-item:hover { background: rgba(255,255,255,.01); }
.research-num {
  font-size: 1.05rem;
  color: var(--ink-w3);
  font-variant-numeric: tabular-nums;
  font-weight: 500;
  letter-spacing: 1px;
}
.research-eyebrow {
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: 3px;
  color: var(--accent);
  text-transform: uppercase;
  margin-bottom: .8rem;
}
.research-title {
  font-size: clamp(1.3rem, 2.5vw, 1.7rem);
  font-weight: 600;
  color: var(--ink-w);
  margin-bottom: 1rem;
  line-height: 1.3;
  letter-spacing: -0.3px;
}
.research-abstract {
  font-size: 1rem;
  color: var(--ink-w2);
  line-height: 1.85;
  margin-bottom: 1.2rem;
  max-width: 680px;
}
.research-tags {
  display: flex;
  gap: .5rem;
  flex-wrap: wrap;
}
.research-tag {
  font-size: .72rem;
  padding: .3rem .8rem;
  border-radius: 99px;
  background: rgba(255,255,255,.03);
  color: var(--ink-w3);
  border: 1px solid rgba(255,255,255,.06);
  font-weight: 500;
}

/* ═══════════════════════════════════════
   PHILOSOPHY COMPACT CARDS
   ═══════════════════════════════════════ */
.philosophy-compact {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1px;
}
.phil-card {
  display: grid;
  grid-template-columns: 64px 1fr;
  gap: 1.5rem;
  padding: 2rem 0;
  border-bottom: 1px solid rgba(255,255,255,.06);
  align-items: start;
}
.phil-card:first-child { padding-top: 0; }
.phil-card:last-child { border-bottom: none; }
.phil-num {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--accent);
  font-variant-numeric: tabular-nums;
  opacity: .6;
  padding-top: .15rem;
}
.phil-content h3 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--ink-w);
  margin-bottom: .6rem;
  letter-spacing: -.2px;
}
.phil-content p {
  font-size: .95rem;
  color: var(--ink-w2);
  line-height: 1.85;
}

/* ═══════════════════════════════════════
   RESEARCH COMPACT GRID
   ═══════════════════════════════════════ */
.research-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
  max-width: 960px;
  margin: 0 auto;
}
.research-card {
  padding: 2rem;
  border-radius: var(--radius-lg);
  background: rgba(255,255,255,.02);
  border: 1px solid rgba(255,255,255,.06);
  transition: border-color var(--transition), transform var(--transition);
}
.research-card:hover {
  border-color: rgba(0,179,126,.15);
  transform: translateY(-2px);
}
.research-card-tag {
  font-size: .68rem;
  font-weight: 700;
  letter-spacing: 2px;
  color: var(--accent);
  margin-bottom: .8rem;
  text-transform: uppercase;
}
.research-card h3 {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--ink-w);
  margin-bottom: .8rem;
  letter-spacing: -.2px;
}
.research-card p {
  font-size: .9rem;
  color: var(--ink-w2);
  line-height: 1.8;
}

/* ═══════════════════════════════════════
   ENGINEERING PRINCIPLES (compact)
   ═══════════════════════════════════════ */
.eng-principles {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  max-width: 960px;
  margin: 0 auto;
}
.eng-prin {
  padding: 2rem;
  border-radius: var(--radius-lg);
  background: rgba(255,255,255,.02);
  border: 1px solid rgba(255,255,255,.06);
  position: relative;
}
.eng-prin::before {
  content: '';
  position: absolute; top: 0; left: 0;
  width: 48px; height: 3px;
  background: var(--accent-grad);
  border-radius: var(--radius-lg) 0 var(--radius-lg) 0;
}
.eng-prin-num {
  font-size: .75rem;
  color: var(--accent);
  letter-spacing: 3px;
  font-weight: 700;
  margin-bottom: .8rem;
}
.eng-prin h3 {
  font-size: 1.15rem;
  color: var(--ink-w);
  margin-bottom: .6rem;
  font-weight: 600;
}
.eng-prin p {
  font-size: .9rem;
  color: var(--ink-w2);
  line-height: 1.8;
}

/* ═══════════════════════════════════════
   PHILOSOPHY / 产品哲学 (legacy full-page)
   ═══════════════════════════════════════ */
.section-philosophy {
  padding: 9rem 0;
  background: var(--bg-dark);
}
.philosophy-list {
  max-width: 760px;
  margin: 0 auto;
}
.philosophy-item {
  padding: 4rem 0;
  border-bottom: 1px solid rgba(255,255,255,.06);
}
.philosophy-item:first-child { padding-top: 0; }
.philosophy-item:last-child { border-bottom: none; padding-bottom: 0; }

.philosophy-num {
  display: inline-block;
  font-size: .75rem;
  letter-spacing: 4px;
  color: var(--accent);
  margin-bottom: 1.2rem;
  font-variant-numeric: tabular-nums;
  font-weight: 600;
}
.philosophy-headline {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 600;
  line-height: 1.35;
  margin-bottom: 1.5rem;
  color: var(--ink-w);
  letter-spacing: -0.4px;
}
.philosophy-body {
  font-size: 1.05rem;
  color: var(--ink-w2);
  line-height: 1.95;
}
.philosophy-body p { margin-bottom: 1.2rem; }
.philosophy-body p:last-child { margin-bottom: 0; }
.philosophy-body strong { color: var(--ink-w); font-weight: 600; }
.philosophy-body em {
  font-style: normal;
  background: linear-gradient(120deg, transparent 60%, rgba(0,179,126,.15) 60%);
  padding: 0 4px;
}

/* ═══════════════════════════════════════
   ARTICLE PROSE / 长文阅读
   ═══════════════════════════════════════ */
.article-page {
  background: var(--bg-dark);
  color: var(--ink-w);
}
.article-hero {
  padding: 12rem 0 5rem;
  border-bottom: 1px solid rgba(255,255,255,.06);
}
.article-hero .container { max-width: 880px; }
.article-eyebrow {
  font-size: .8rem;
  letter-spacing: 4px;
  color: var(--accent);
  font-weight: 600;
  margin-bottom: 1.5rem;
  text-transform: uppercase;
}
.article-hero h1 {
  font-size: clamp(2.2rem, 5vw, 3.6rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -1px;
  color: var(--ink-w);
  margin-bottom: 1.5rem;
}
.article-lede {
  font-size: 1.2rem;
  line-height: 1.85;
  color: var(--ink-w2);
  max-width: 700px;
}
.article-meta {
  display: flex;
  gap: 1.5rem;
  margin-top: 2rem;
  font-size: .8rem;
  color: var(--ink-w3);
}
.article-meta span {
  display: flex; align-items: center; gap: 6px;
  padding: .35rem .8rem;
  border-radius: 99px;
  background: rgba(255,255,255,.04);
  border: 1px solid rgba(255,255,255,.06);
}

.article-toc {
  padding: 3rem 0 1rem;
  border-bottom: 1px solid rgba(255,255,255,.06);
}
.article-toc-title {
  font-size: .75rem;
  letter-spacing: 3px;
  color: var(--ink-w3);
  margin-bottom: 1.5rem;
  font-weight: 700;
  text-transform: uppercase;
}
.article-toc-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: .8rem 2rem;
  list-style: none;
  counter-reset: toc;
  padding: 0;
}
.article-toc-list li {
  counter-increment: toc;
  font-size: .92rem;
  color: var(--ink-w2);
  padding: .4rem 0;
  border-top: 1px solid rgba(255,255,255,.04);
}
.article-toc-list li::before {
  content: counter(toc, decimal-leading-zero) " · ";
  color: var(--accent);
  font-weight: 500;
  font-variant-numeric: tabular-nums;
}
.article-toc-list a {
  color: var(--ink-w2);
  transition: color var(--transition);
}
.article-toc-list a:hover { color: var(--accent); }

.article-prose {
  padding: 4rem 2rem 6rem;
  max-width: 760px;
  margin: 0 auto;
}
.article-prose h2 {
  font-size: 1.7rem;
  font-weight: 700;
  margin: 4rem 0 1.2rem;
  color: var(--ink-w);
  letter-spacing: -0.3px;
  scroll-margin-top: 100px;
  padding-top: 2rem;
}
.article-prose h2:first-child { margin-top: 0; padding-top: 0; }
.article-prose h3 {
  font-size: 1.2rem;
  font-weight: 600;
  margin: 2.5rem 0 1rem;
  color: var(--ink-w);
}
.article-prose h2 + h3 { margin-top: 1.5rem; }
.article-prose p {
  font-size: 1.05rem;
  color: var(--ink-w2);
  line-height: 1.95;
  margin-bottom: 1.4rem;
}
.article-prose strong { color: var(--ink-w); font-weight: 600; }
.article-prose em {
  font-style: normal;
  background: linear-gradient(120deg, transparent 60%, rgba(0,179,126,.18) 60%);
  padding: 0 3px;
}
.article-prose blockquote {
  border-left: 3px solid var(--accent);
  padding: 1.2rem 1.5rem;
  margin: 2.5rem 0;
  font-size: 1.1rem;
  color: var(--ink-w);
  font-weight: 500;
  line-height: 1.75;
  background: rgba(0,179,126,.03);
  border-radius: 0 var(--radius) var(--radius) 0;
}
.article-prose ul, .article-prose ol {
  padding-left: 1.5rem;
  color: var(--ink-w2);
  margin-bottom: 1.5rem;
}
.article-prose ul { list-style: disc; }
.article-prose ol { list-style: decimal; }
.article-prose li {
  margin-bottom: .6rem;
  line-height: 1.85;
  font-size: 1.02rem;
}
.article-prose li::marker {
  color: var(--accent);
}
.article-prose hr {
  border: none;
  border-top: 1px solid rgba(255,255,255,.08);
  margin: 4rem 0;
}
.article-prose code {
  font-family: ui-monospace, "SF Mono", "JetBrains Mono", Consolas, monospace;
  background: rgba(255,255,255,.06);
  padding: 2px 8px;
  border-radius: 4px;
  font-size: .88em;
  color: var(--accent);
}
.article-prose .callout {
  padding: 1.5rem 1.8rem;
  border-radius: var(--radius);
  background: rgba(0,179,126,.05);
  border: 1px solid rgba(0,179,126,.15);
  margin: 2rem 0;
}
.article-prose .callout-title {
  font-size: .75rem;
  letter-spacing: 2px;
  color: var(--accent);
  font-weight: 700;
  margin-bottom: .6rem;
  text-transform: uppercase;
}

/* article navigation prev/next */
.article-nav {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  padding: 3rem 0;
  border-top: 1px solid rgba(255,255,255,.06);
}
.article-nav a {
  padding: 1.5rem;
  border-radius: var(--radius);
  background: rgba(255,255,255,.03);
  border: 1px solid rgba(255,255,255,.06);
  transition: border-color var(--transition), transform var(--transition);
}
.article-nav a:hover { border-color: var(--accent); transform: translateY(-2px); }
.article-nav-label {
  font-size: .72rem;
  letter-spacing: 2px;
  color: var(--ink-w3);
  margin-bottom: .4rem;
}
.article-nav-title {
  font-size: 1rem;
  color: var(--ink-w);
  font-weight: 600;
}
.article-nav .prev { text-align: left; }
.article-nav .next { text-align: right; }

/* ═══════════════════════════════════════
   TEAM STORY (replaces Founder)
   ═══════════════════════════════════════ */
.team-dna {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
  margin-top: 4rem;
  max-width: 880px;
  margin-left: auto;
  margin-right: auto;
}
.team-dna-card {
  padding: 1.8rem 1.4rem;
  border-radius: var(--radius);
  background: rgba(255,255,255,.03);
  border: 1px solid rgba(255,255,255,.06);
  text-align: center;
}
.team-dna-icon { font-size: 1.6rem; margin-bottom: .8rem; }
.team-dna-title { font-size: .9rem; font-weight: 600; color: var(--ink-w); margin-bottom: .4rem; }
.team-dna-desc { font-size: .78rem; color: var(--ink-w3); line-height: 1.5; }

/* ═══════════════════════════════════════
   ENGINEERING STACK
   ═══════════════════════════════════════ */
.eng-stack {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}
.eng-pillar {
  padding: 2.5rem;
  border-radius: var(--radius-lg);
  background: rgba(255,255,255,.02);
  border: 1px solid rgba(255,255,255,.06);
  position: relative;
}
.eng-pillar::before {
  content: '';
  position: absolute; top: 0; left: 0;
  width: 60px; height: 3px;
  background: var(--accent-grad);
  border-radius: var(--radius-lg) 0 var(--radius-lg) 0;
}
.eng-pillar-num {
  font-size: .75rem;
  color: var(--accent);
  letter-spacing: 3px;
  font-weight: 700;
  margin-bottom: 1rem;
}
.eng-pillar-title {
  font-size: 1.3rem;
  color: var(--ink-w);
  margin-bottom: 1rem;
  font-weight: 600;
}
.eng-pillar-desc {
  font-size: .95rem;
  color: var(--ink-w2);
  line-height: 1.85;
  margin-bottom: 1.2rem;
}
.eng-pillar-list {
  list-style: none;
  padding: 0;
}
.eng-pillar-list li {
  font-size: .85rem;
  color: var(--ink-w3);
  padding: .4rem 0;
  border-top: 1px dashed rgba(255,255,255,.04);
  display: flex;
  gap: 8px;
}
.eng-pillar-list li::before { content: '→'; color: var(--accent); flex-shrink: 0; }

/* ═══════════════════════════════════════
   RESPONSIVE
   ═══════════════════════════════════════ */
@media (max-width: 1024px) {
  .products-grid { grid-template-columns: 1fr; }
  .products-grid.scene-grid { grid-template-columns: repeat(2, 1fr); }
  .about-preview { grid-template-columns: 1fr; }
  .flywheel-layout { grid-template-columns: 1fr; }
  .multimodal-layout { grid-template-columns: 1fr; }
  .mv-cards { grid-template-columns: 1fr; }
  .values-grid { grid-template-columns: repeat(3, 1fr); }
  .synergy-cards { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 2fr 1fr 1fr; }
  .contact-grid { grid-template-columns: 1fr 1fr; }
  .article-toc-list { grid-template-columns: 1fr; }
  .article-meta { flex-wrap: wrap; }
  .team-dna { grid-template-columns: repeat(2, 1fr); }
  .eng-stack { grid-template-columns: 1fr; }
  .research-item { grid-template-columns: 1fr; gap: 1rem; }
  .article-nav { grid-template-columns: 1fr; }
  .research-grid { grid-template-columns: 1fr; }
  .eng-principles { grid-template-columns: 1fr; }
  .phil-card { grid-template-columns: 48px 1fr; gap: 1rem; }
}

@media (max-width: 768px) {
  :root { --nav-h: 60px; }
  .section { padding: 4rem 0; }
  .container { padding: 0 1.2rem; }

  .nav-links { display: none; }
  .nav-links.open {
    display: flex; flex-direction: column;
    position: absolute; top: var(--nav-h); left: 0; right: 0;
    background: rgba(10,14,26,.98);
    backdrop-filter: blur(20px);
    padding: 1.5rem 2rem;
    gap: 1.2rem;
    border-bottom: 1px solid var(--line-dark);
  }
  .nav-toggle { display: flex; }

  .hero h1 { letter-spacing: 0; }
  .hero-stats { gap: 1.5rem; flex-wrap: wrap; }

  .products-grid { grid-template-columns: 1fr; }
  .products-grid.scene-grid { grid-template-columns: 1fr; }
  .values-grid { grid-template-columns: 1fr 1fr; }
  .synergy-branches { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; gap: .5rem; text-align: center; }
  .contact-grid { grid-template-columns: 1fr; }

  .flywheel-ring { width: 240px; height: 240px; }
  .flywheel-node { width: 64px; height: 64px; font-size: .6rem; }
}

.product-shot {
  margin-top: 2rem;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--line-dark);
  background: var(--bg-dark-3);
}
.product-shot img { width: 100%; height: auto; display: block; }
.product-shot-cap {
  padding: .7rem 1rem;
  font-size: .78rem;
  color: var(--ink-w3);
  border-top: 1px solid var(--line-dark);
}

@media (max-width: 480px) {
  .values-grid { grid-template-columns: 1fr; }
  .hero-actions { flex-direction: column; align-items: center; }
}