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

:root {
  --primary: #1a1a2e;
  --primary-light: #16213e;
  --accent: #4f46e5;
  --accent-light: #818cf8;
  --accent-glow: rgba(79, 70, 229, 0.15);
  --surface: #ffffff;
  --surface-alt: #f8f9fc;
  --surface-dark: #0f0f1a;
  --surface-dark-alt: #161625;
  --text: #1a1a2e;
  --text-secondary: #64748b;
  --text-light: #e2e8f0;
  --text-light-secondary: #94a3b8;
  --border: #e2e8f0;
  --border-dark: #2d2d44;
  --success: #10b981;
  --warning: #f59e0b;
  --radius: 16px;
  --radius-sm: 10px;
  --radius-xs: 6px;
  --shadow: 0 1px 3px rgba(0,0,0,0.06), 0 4px 12px rgba(0,0,0,0.04);
  --shadow-lg: 0 4px 20px rgba(0,0,0,0.08), 0 8px 32px rgba(0,0,0,0.04);
}

html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: 'Inter', 'Noto Sans SC', -apple-system, sans-serif;
  color: var(--text);
  background: var(--surface);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ===== Icons ===== */
.icon-xs { width: 14px; height: 14px; }
.icon-sm { width: 18px; height: 18px; }
.icon-md { width: 24px; height: 24px; }
.icon-lg { width: 32px; height: 32px; }
.icon-xl { width: 48px; height: 48px; }
.icon-nav { width: 22px; height: 22px; }

/* ===== Navigation ===== */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 16px 0;
  transition: all 0.3s ease;
}
.nav-scrolled {
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  padding: 12px 0;
}
.nav-inner {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.05rem;
  color: #fff;
}
.nav-scrolled .nav-brand { color: var(--text); }
.nav-logo {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: rgba(255,255,255,0.15);
  display: flex;
  align-items: center;
  justify-content: center;
}
.nav-scrolled .nav-logo { background: var(--accent-glow); }
.nav-scrolled .nav-logo .icon-nav { color: var(--accent); }
.nav-links {
  display: flex;
  gap: 32px;
}
.nav-links a {
  text-decoration: none;
  color: rgba(255,255,255,0.7);
  font-size: 0.9rem;
  font-weight: 500;
  transition: color 0.2s;
}
.nav-links a:hover { color: #fff; }
.nav-scrolled .nav-links a { color: var(--text-secondary); }
.nav-scrolled .nav-links a:hover { color: var(--text); }

/* ===== Hero ===== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: linear-gradient(160deg, #0f0f1a 0%, #1a1a3e 40%, #2d1b69 70%, #4f46e5 100%);
}
.hero-bg {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 80% 60% at 50% 40%, rgba(79,70,229,0.2) 0%, transparent 70%);
}
.hero-content {
  position: relative;
  text-align: center;
  padding: 120px 24px 80px;
}
.hero-badge {
  display: inline-block;
  padding: 6px 18px;
  border-radius: 100px;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.12);
  color: var(--accent-light);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.5px;
  margin-bottom: 28px;
  backdrop-filter: blur(8px);
}
.hero h1 {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 800;
  color: #fff;
  line-height: 1.15;
  margin-bottom: 20px;
  letter-spacing: -0.02em;
}
.gradient-text {
  background: linear-gradient(135deg, #818cf8, #c084fc, #f0abfc);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-subtitle {
  font-size: 1.15rem;
  color: rgba(255,255,255,0.6);
  max-width: 600px;
  margin: 0 auto 48px;
  line-height: 1.7;
}
.hero-stats {
  display: flex;
  justify-content: center;
  gap: 60px;
  margin-bottom: 48px;
}
.hero-stat-value {
  font-size: 2.5rem;
  font-weight: 800;
  color: #fff;
  line-height: 1;
}
.hero-stat-label {
  font-size: 0.85rem;
  color: rgba(255,255,255,0.5);
  margin-top: 6px;
  font-weight: 500;
}
.hero-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: rgba(255,255,255,0.6);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  transition: color 0.2s;
  animation: float 2s ease-in-out infinite;
}
.hero-cta:hover { color: #fff; }
@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(6px); }
}

/* ===== Sections ===== */
.section {
  padding: 100px 0;
}
.section-dark {
  background: var(--surface-dark);
  color: var(--text-light);
}
.section-accent {
  background: linear-gradient(160deg, #1a1a3e 0%, #2d1b69 50%, #4f46e5 100%);
  color: #fff;
}
.section-header {
  text-align: center;
  margin-bottom: 64px;
}
.section-icon {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  background: var(--accent-glow);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
  color: var(--accent);
}
.section-dark .section-icon {
  background: rgba(129, 140, 248, 0.12);
  color: var(--accent-light);
}
.section-label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 1.5px;
  margin-bottom: 12px;
}
.section-dark .section-label { color: var(--accent-light); }
.section-header h2 {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}
.section-desc {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.7;
}
.section-dark .section-desc { color: var(--text-light-secondary); }

/* ===== Capabilities Grid ===== */
.capabilities-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}
.cap-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 24px;
  text-align: center;
  transition: all 0.3s ease;
}
.cap-card:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow-lg), 0 0 0 1px var(--accent);
  transform: translateY(-2px);
}
.cap-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: var(--accent-glow);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
  color: var(--accent);
}
.cap-card h4 {
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 6px;
}
.cap-card p {
  font-size: 0.82rem;
  color: var(--text-secondary);
}

/* ===== Architecture Stack ===== */
.arch-stack {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.arch-layer {
  background: var(--surface-dark-alt);
  border: 1px solid var(--border-dark);
  border-radius: var(--radius);
  padding: 28px 32px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}
.arch-layer::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--accent);
  opacity: 0;
  transition: opacity 0.3s;
}
.arch-layer:hover::before { opacity: 1; }
.arch-layer:hover {
  border-color: rgba(129, 140, 248, 0.3);
  background: rgba(129, 140, 248, 0.04);
}
.arch-layer-num {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--accent-light);
  letter-spacing: 1px;
}
.arch-layer-content {
  display: flex;
  align-items: flex-start;
  gap: 16px;
}
.arch-layer-icon {
  width: 44px;
  height: 44px;
  min-width: 44px;
  border-radius: 10px;
  background: rgba(129, 140, 248, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-light);
}
.arch-layer-content h4 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 4px;
}
.arch-layer-content p {
  font-size: 0.88rem;
  color: var(--text-light-secondary);
  line-height: 1.5;
}
.arch-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding-left: 60px;
}
.tag {
  padding: 4px 12px;
  border-radius: 100px;
  font-size: 0.75rem;
  font-weight: 500;
  background: rgba(129, 140, 248, 0.08);
  color: var(--accent-light);
  border: 1px solid rgba(129, 140, 248, 0.15);
}

/* ===== Module Cards ===== */
.module-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  margin-bottom: 24px;
  transition: box-shadow 0.3s ease;
}
.module-card:hover { box-shadow: var(--shadow-lg); }
.module-header {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 28px 32px;
  border-bottom: 1px solid var(--border);
}
.module-icon {
  width: 52px;
  height: 52px;
  min-width: 52px;
  border-radius: 14px;
  background: var(--accent-glow);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
}
.module-header h3 {
  font-size: 1.2rem;
  font-weight: 700;
}
.module-subtitle {
  font-size: 0.88rem;
  color: var(--text-secondary);
  margin-top: 2px;
}
.module-badge {
  margin-left: auto;
  padding: 4px 14px;
  border-radius: 100px;
  font-size: 0.78rem;
  font-weight: 600;
  white-space: nowrap;
}
.badge-active {
  background: rgba(16, 185, 129, 0.1);
  color: var(--success);
  border: 1px solid rgba(16, 185, 129, 0.2);
}
.badge-expanding {
  background: rgba(245, 158, 11, 0.1);
  color: var(--warning);
  border: 1px solid rgba(245, 158, 11, 0.2);
}
.module-body {
  padding: 32px;
}

/* Module Flow */
.module-flow {
  display: flex;
  align-items: flex-start;
  gap: 0;
  overflow-x: auto;
  padding-bottom: 8px;
}
.flow-step {
  flex: 1;
  min-width: 140px;
  text-align: center;
  padding: 0 8px;
}
.flow-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: var(--accent-glow);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  margin: 0 auto 12px;
}
.flow-label {
  font-size: 0.88rem;
  font-weight: 700;
  margin-bottom: 4px;
}
.flow-desc {
  font-size: 0.78rem;
  color: var(--text-secondary);
  line-height: 1.5;
}
.flow-arrow {
  display: flex;
  align-items: center;
  padding-top: 12px;
  color: var(--accent-light);
  opacity: 0.4;
}

/* Checks Grid */
.checks-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}
.check-card {
  background: var(--surface-alt);
  border-radius: var(--radius-sm);
  padding: 24px;
  border: 1px solid var(--border);
  transition: all 0.2s;
}
.check-card:hover {
  border-color: var(--accent);
}
.check-icon {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: var(--accent-glow);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  margin-bottom: 12px;
}
.check-card h4 {
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 6px;
}
.check-card p {
  font-size: 0.82rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* Knowledge Grid */
.knowledge-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.knowledge-card {
  background: var(--surface-alt);
  border-radius: var(--radius-sm);
  padding: 24px;
  border: 1px solid var(--border);
}
.knowledge-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
  color: var(--accent);
}
.knowledge-header h4 {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text);
}
.knowledge-card ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.knowledge-card li {
  font-size: 0.82rem;
  color: var(--text-secondary);
  padding-left: 16px;
  position: relative;
  line-height: 1.5;
}
.knowledge-card li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 8px;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--accent);
  opacity: 0.5;
}

/* Systems Grid */
.systems-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}
.system-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 20px;
  background: var(--surface-alt);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
}
.system-icon {
  width: 40px;
  height: 40px;
  min-width: 40px;
  border-radius: 10px;
  background: var(--accent-glow);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
}
.system-item strong {
  font-size: 0.92rem;
  display: block;
  margin-bottom: 2px;
}
.system-item p {
  font-size: 0.82rem;
  color: var(--text-secondary);
}

/* ===== Sales Pipeline ===== */
.sales-pipeline {
  display: flex;
  align-items: flex-start;
  gap: 0;
}
.pipeline-step {
  flex: 1;
  text-align: center;
  padding: 0 16px;
  position: relative;
}
.pipeline-num {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
  font-weight: 800;
  font-size: 0.9rem;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
}
.pipeline-icon {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  background: rgba(129, 140, 248, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-light);
  margin: 0 auto 16px;
}
.pipeline-step h4 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 8px;
}
.pipeline-step p {
  font-size: 0.82rem;
  color: var(--text-light-secondary);
  line-height: 1.6;
}
.pipeline-connector {
  width: 40px;
  min-width: 40px;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), rgba(129, 140, 248, 0.2));
  margin-top: 56px;
}

/* ===== Maturity Tiers ===== */
.maturity-tiers {
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.tier {
  border-radius: var(--radius);
  padding: 28px 32px;
  border: 1px solid var(--border);
}
.tier-1 { background: linear-gradient(135deg, rgba(16,185,129,0.04), rgba(16,185,129,0.01)); border-color: rgba(16,185,129,0.2); }
.tier-2 { background: linear-gradient(135deg, rgba(79,70,229,0.04), rgba(79,70,229,0.01)); border-color: rgba(79,70,229,0.15); }
.tier-3 { background: linear-gradient(135deg, rgba(245,158,11,0.04), rgba(245,158,11,0.01)); border-color: rgba(245,158,11,0.15); }
.tier-header {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 18px;
}
.tier-badge {
  padding: 4px 14px;
  border-radius: 100px;
  font-size: 0.78rem;
  font-weight: 700;
}
.tier-badge-1 { background: rgba(16,185,129,0.12); color: var(--success); }
.tier-badge-2 { background: rgba(79,70,229,0.12); color: var(--accent); }
.tier-badge-3 { background: rgba(245,158,11,0.12); color: var(--warning); }
.tier-label {
  font-size: 0.88rem;
  color: var(--text-secondary);
  font-weight: 500;
}
.tier-items {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}
.tier-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.9rem;
  font-weight: 500;
}
.tier-1 .tier-item { color: var(--success); }
.tier-2 .tier-item { color: var(--accent); }
.tier-3 .tier-item { color: var(--warning); }

/* ===== Strategy Cards ===== */
.strategy-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.strategy-card {
  background: var(--surface-dark-alt);
  border: 1px solid var(--border-dark);
  border-radius: var(--radius);
  padding: 36px 28px;
  position: relative;
  overflow: hidden;
  transition: all 0.3s ease;
}
.strategy-card:hover {
  border-color: rgba(129, 140, 248, 0.3);
  transform: translateY(-3px);
}
.strategy-num {
  font-size: 3rem;
  font-weight: 900;
  color: rgba(129, 140, 248, 0.08);
  position: absolute;
  top: 12px;
  right: 20px;
  line-height: 1;
}
.strategy-icon {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  background: rgba(129, 140, 248, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-light);
  margin-bottom: 20px;
}
.strategy-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 10px;
}
.strategy-card p {
  font-size: 0.88rem;
  color: var(--text-light-secondary);
  line-height: 1.6;
  margin-bottom: 20px;
}
.strategy-result {
  display: flex;
  align-items: center;
  gap: 8px;
  padding-top: 16px;
  border-top: 1px solid var(--border-dark);
  font-size: 0.82rem;
  color: var(--accent-light);
  font-weight: 500;
}

/* ===== Features Grid ===== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.feature-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px 28px;
  text-align: center;
  transition: all 0.3s;
}
.feature-card:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow-lg);
}
.feature-icon {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  background: var(--accent-glow);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  margin: 0 auto 18px;
}
.feature-card h4 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 8px;
}
.feature-card p {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ===== Summary ===== */
.summary-block {
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
  padding: 40px 0;
}
.summary-icon {
  color: rgba(255,255,255,0.15);
  margin-bottom: 24px;
}
.summary-block blockquote {
  font-size: 1.2rem;
  line-height: 1.8;
  font-weight: 400;
  color: rgba(255,255,255,0.85);
  border: none;
  padding: 0;
  margin: 0;
}

/* ===== Footer ===== */
.footer {
  background: var(--surface-dark);
  border-top: 1px solid var(--border-dark);
  padding: 28px 0;
}
.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text-light-secondary);
  font-size: 0.88rem;
  font-weight: 500;
}
.footer-note {
  font-size: 0.82rem;
  color: rgba(255,255,255,0.3);
}

/* ===== Animations ===== */
.animate-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}
.animate-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Stagger arch layers */
.arch-layer.animate-in { transition-delay: calc(var(--layer-index) * 80ms); }

/* ===== Responsive ===== */
@media (max-width: 900px) {
  .capabilities-grid { grid-template-columns: repeat(2, 1fr); }
  .checks-grid { grid-template-columns: 1fr; }
  .knowledge-grid { grid-template-columns: 1fr; }
  .systems-grid { grid-template-columns: 1fr; }
  .strategy-cards { grid-template-columns: 1fr; }
  .features-grid { grid-template-columns: 1fr; }
  .sales-pipeline {
    flex-direction: column;
    align-items: center;
    gap: 16px;
  }
  .pipeline-connector {
    width: 2px;
    height: 24px;
    margin-top: 0;
    background: linear-gradient(180deg, var(--accent), rgba(129, 140, 248, 0.2));
  }
  .module-flow {
    flex-direction: column;
    align-items: center;
  }
  .flow-arrow {
    transform: rotate(90deg);
    padding-top: 0;
    padding: 4px 0;
  }
  .hero-stats { gap: 32px; }
  .nav-links { display: none; }
}
@media (max-width: 600px) {
  .capabilities-grid { grid-template-columns: 1fr; }
  .section { padding: 64px 0; }
  .hero-stats { flex-direction: column; gap: 20px; }
  .arch-tags { padding-left: 0; }
  .module-header { flex-wrap: wrap; }
  .module-badge { margin-left: 0; }
}