/* ═══════════════════════════════════════════
   ChanceMatrix AI — Official Website (Marketing)
   Light Theme · Blue Accent · Minimal Tech · Responsive
   ═══════════════════════════════════════════ */

/* ── CSS Variables ── */
:root {
  --bg-primary: #F8FAFC;
  --bg-secondary: #FFFFFF;
  --bg-tertiary: #F1F5F9;
  --bg-card: #FFFFFF;
  --accent: #2563EB;
  --accent-light: #3B82F6;
  --accent-dim: rgba(37, 99, 235, 0.06);
  --accent-glow: rgba(37, 99, 235, 0.12);
  --text-primary: #0F172A;
  --text-secondary: #475569;
  --text-muted: #94A3B8;
  --highlight: #F59E0B;
  --highlight-bg: rgba(245, 158, 11, 0.08);
  --blue: #2563EB;
  --green: #10B981;
  --yellow: #F59E0B;
  --purple: #8B5CF6;
  --pink: #EC4899;
  --border: #E2E8F0;
  --border-light: rgba(226, 232, 240, 0.6);
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.04), 0 1px 2px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.06), 0 2px 4px rgba(0,0,0,0.04);
  --shadow-lg: 0 12px 32px rgba(0,0,0,0.08), 0 4px 8px rgba(0,0,0,0.04);
  --shadow-xl: 0 20px 48px rgba(0,0,0,0.1), 0 8px 16px rgba(0,0,0,0.04);
  --font: 'Noto Sans SC', 'Microsoft YaHei', -apple-system, 'Segoe UI', sans-serif;
  --max-width: 1200px;
  --nav-height: 68px;
  --radius: 12px;
  --radius-sm: 8px;
  --radius-lg: 16px;
  --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ── Reset & Base ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: var(--font);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--accent); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--accent-light); }
img { max-width: 100%; height: auto; }
.container { max-width: var(--max-width); margin: 0 auto; padding: 0 32px; }
section { padding: 100px 0; position: relative; }

/* ── Section Header ── */
.section-header { margin-bottom: 60px; position: relative; }
.section-number {
  display: inline-block; font-size: 0.875rem; font-weight: 700;
  color: var(--accent); letter-spacing: 2px; margin-bottom: 12px;
  padding: 4px 12px; background: var(--accent-dim); border-radius: 4px;
}
.section-header h2 {
  font-size: 2.25rem; font-weight: 800; color: var(--text-primary);
  margin-bottom: 8px; display: inline-block; letter-spacing: -0.5px;
}
.section-header h2::after {
  content:''; display:block; width:60px; height:4px;
  background: linear-gradient(90deg, var(--accent), var(--accent-light));
  margin-top:12px; border-radius:2px;
}
.section-subtitle {
  font-size: 1.15rem; color: var(--text-secondary); margin-top: 16px;
  white-space: nowrap;
}
.sub-heading {
  font-size: 1.15rem; font-weight: 700; color: var(--text-primary);
  margin: 36px 0 12px; padding-left: 16px;
  border-left: 3px solid var(--accent);
}

/* ── Section Background Alternation ── */
section:nth-of-type(even) { background: var(--bg-secondary); }
section:nth-of-type(odd) { background: var(--bg-primary); }
#hero { background: var(--bg-primary); }

/* ── Scroll Animation ── */
.animate { opacity: 0; transform: translateY(30px); transition: opacity 0.6s ease, transform 0.6s ease; }
.animate.visible { opacity: 1; transform: translateY(0); }

/* ═══════════════ Navigation ═══════════════ */
#navbar {
  position: fixed; top:0; left:0; right:0; z-index:1000; height:var(--nav-height);
  background: rgba(255,255,255,0.85); backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--border-light);
  transition: box-shadow var(--transition);
}
#navbar.scrolled { box-shadow: var(--shadow-sm); }
.nav-container {
  max-width:var(--max-width); margin:0 auto; padding:0 32px;
  display:flex; align-items:center; justify-content:space-between; height:100%;
}
.nav-logo {
  font-size:1.3rem; font-weight:800; color:var(--text-primary);
  letter-spacing:-0.3px;
}
.nav-logo .accent { color:var(--accent); }
.nav-links { display:flex; list-style:none; gap:2px; align-items:center; }
.nav-links a {
  color:var(--text-secondary); font-size:0.875rem; font-weight:500;
  padding:8px 14px; border-radius:8px; transition:all var(--transition); white-space:nowrap;
}
.nav-links a:hover, .nav-links a.active {
  color:var(--accent); background:var(--accent-dim);
}
.nav-cta {
  background:var(--accent)!important; color:#FFFFFF!important;
  font-weight:600!important; padding:8px 20px!important;
  box-shadow: 0 2px 8px rgba(37,99,235,0.2);
}
.nav-cta:hover {
  background:var(--accent-light)!important; color:#FFFFFF!important;
  box-shadow: 0 4px 14px rgba(37,99,235,0.3);
  transform: translateY(-1px);
}
.nav-toggle {
  display:none; flex-direction:column; gap:5px; background:none;
  border:none; cursor:pointer; padding:4px;
}
.nav-toggle span { display:block; width:24px; height:2px; background:var(--text-primary); border-radius:2px; transition:var(--transition); }

/* ═══════════════ Section: Hero ═══════════════ */
#hero {
  min-height: 100vh; display:flex; align-items:center; justify-content:center;
  text-align:center; padding:0 32px; position:relative; overflow:hidden;
  background: linear-gradient(180deg, #F0F4FF 0%, #F8FAFC 40%, #FFFFFF 100%);
}
.hero-bg {
  position:absolute; inset:0;
  background:
    radial-gradient(ellipse at 20% 50%, rgba(37,99,235,0.06) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 20%, rgba(59,130,246,0.04) 0%, transparent 50%),
    radial-gradient(ellipse at 50% 80%, rgba(37,99,235,0.03) 0%, transparent 50%);
  z-index:0;
}
/* Decorative grid pattern */
.hero-bg::after {
  content: '';
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(37,99,235,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(37,99,235,0.03) 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-content { position:relative; z-index:1; max-width:860px; }
.hero-badge {
  display:inline-block; font-size:1rem; font-weight:600;
  color:var(--accent); padding:8px 22px;
  background: var(--accent-dim); border:1px solid rgba(37,99,235,0.15);
  border-radius:24px; margin-bottom:32px; letter-spacing:0.5px;
}
.hero-title { margin-bottom:24px; }
.hero-title-main {
  display:block; font-size:3rem; font-weight:900;
  color:var(--text-primary); letter-spacing:-1.5px; line-height:1.1;
}
.hero-title-main .accent-text { color: var(--accent); }
.hero-title-sub {
  display:block; font-size:1.5rem; font-weight:400;
  color:var(--text-secondary); margin-top:12px;
}
.hero-divider { width:80px; height:4px; background:linear-gradient(90deg,var(--accent),var(--accent-light)); margin:28px auto; border-radius:2px; }
.hero-tagline {
  font-size:1.15rem; color:var(--text-secondary); line-height:1.9;
  margin-bottom:36px; max-width:720px; margin-left:auto; margin-right:auto;
}

.hero-stats-row { display:flex; justify-content:center; gap:48px; margin-top:44px; flex-wrap:wrap; }
.hero-stat { text-align:center; }
.hero-stat-num { display:block; font-size:1.75rem; font-weight:900; color:var(--accent); line-height:1.1; }
.hero-stat-label { display:block; font-size:0.875rem; color:var(--text-muted); margin-top:4px; font-weight:500; }

.hero-cta { display:flex; gap:16px; justify-content:center; flex-wrap:wrap; margin-bottom:16px; }
.btn-primary, .btn-outline {
  display:inline-flex; align-items:center; gap:8px;
  padding:14px 36px; border-radius:50px; font-size:1rem;
  font-weight:600; cursor:pointer; transition:all var(--transition);
  letter-spacing:0.3px;
}
.btn-primary {
  background:var(--accent); color:#FFFFFF; border:2px solid var(--accent);
  box-shadow: 0 4px 14px rgba(37,99,235,0.25);
}
.btn-primary:hover {
  background:var(--accent-light); border-color:var(--accent-light);
  transform:translateY(-2px);
  box-shadow: 0 8px 24px rgba(37,99,235,0.35);
  color:#FFFFFF;
}
.btn-outline {
  background:transparent; color:var(--text-primary);
  border:2px solid var(--border);
}
.btn-outline:hover {
  border-color:var(--accent); color:var(--accent);
  transform:translateY(-2px); background: var(--accent-dim);
}
.hero-scroll {
  position:absolute; bottom:40px; left:50%; transform:translateX(-50%);
  display:flex; flex-direction:column; align-items:center; gap:8px;
  color:var(--text-muted); font-size:0.875rem; z-index:1;
}
.scroll-indicator { width:20px; height:36px; border:2px solid var(--text-muted); border-radius:10px; position:relative; }
.scroll-indicator::after {
  content:''; position:absolute; top:6px; left:50%; transform:translateX(-50%);
  width:4px; height:8px; background:var(--accent); border-radius:2px;
  animation:scroll-bounce 2s infinite;
}
@keyframes scroll-bounce {
  0%,100%{transform:translateX(-50%) translateY(0);opacity:1}
  50%{transform:translateX(-50%) translateY(8px);opacity:.3}
}

/* ═══════════════ Section: Vision ═══════════════ */
.vision-grid { display:grid; grid-template-columns:repeat(3,1fr); gap:24px; }
.vision-card {
  background:var(--bg-card); border:1px solid var(--border);
  border-radius:var(--radius-lg); padding:40px 32px;
  box-shadow: var(--shadow-sm);
  transition:transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}
.vision-card:hover {
  transform:translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(37,99,235,0.2);
}
.vision-icon { font-size:2.2rem; margin-right:10px; display:inline; vertical-align:middle; }
.vision-card h3 {
  font-size:1.15rem; color:var(--text-primary); margin-bottom:14px;
  font-weight:700; display:flex; align-items:center; gap:0;
}
.vision-card p, .vision-card ul { color:var(--text-secondary); font-size:1rem; line-height:1.8; }
.vision-card ul { list-style:none; padding:0; }
.vision-card li { padding:5px 0 5px 20px; position:relative; }
.vision-card li::before { content:'→'; position:absolute; left:0; color:var(--accent); font-weight:600; }

/* ═══════════════ Section: Market ═══════════════ */
.market-intro { font-size:1rem; color:var(--text-secondary); line-height:1.9; margin-bottom:32px; max-width:900px; }

/* Chart wrapper */
.chart-wrapper {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px 28px;
  margin-bottom: 16px;
  overflow-x: auto;
  box-shadow: var(--shadow-sm);
}
.market-chart { width:100%; min-width:700px; }

/* Pain Points */
.pain-list { display:flex; flex-direction:column; gap:16px; margin-bottom:40px; }
.pain-item {
  background:var(--bg-card); border-left:4px solid var(--highlight);
  border:1px solid var(--border); border-left:4px solid var(--highlight);
  padding:20px 24px; border-radius:0 var(--radius) var(--radius) 0;
  font-size:1rem; color:var(--text-secondary); line-height:1.7;
  box-shadow: var(--shadow-sm);
}
.pain-item strong { color:var(--text-primary); font-size:1.15rem; }
.pain-num {
  display:inline-block; color:var(--highlight); font-weight:900;
  font-size:1.15rem; margin-right:12px; min-width:28px;
}

/* ═══════════════ Section: Solution (Four Pillars) ═══════════════ */
.pillars-grid { display:grid; grid-template-columns:repeat(4,1fr); gap:20px; }
.pillar-card {
  background:var(--bg-card); border:1px solid var(--border);
  border-top:3px solid var(--accent);
  border-radius:var(--radius-lg); padding:36px 28px; text-align:center;
  box-shadow: var(--shadow-sm);
  transition:transform var(--transition), box-shadow var(--transition);
}
.pillar-card:hover {
  transform:translateY(-6px);
  box-shadow: var(--shadow-xl);
}
.pillar-icon { font-size:2.8rem; margin-bottom:20px; display:block; }
.pillar-card h3 { font-size:1.15rem; font-weight:700; color:var(--text-primary); margin-bottom:10px; }
.pillar-desc { font-size:1rem; color:var(--text-secondary); margin-bottom:14px; line-height:1.6; }
.pillar-benefit { font-size:0.875rem; color:var(--accent); line-height:1.5; font-weight:500; }
.pillar-tech { font-size:0.875rem; color:var(--text-muted); line-height:1.5; }

/* ═══════════════ Section: Product Outcomes ═══════════════ */

/* Outcome Metrics */
.outcome-metrics { display:grid; grid-template-columns:repeat(4,1fr); gap:20px; margin-bottom:24px; }
.metric-card {
  background:var(--bg-card); border:1px solid var(--border);
  border-radius:var(--radius-lg); padding:32px 24px; text-align:center;
  box-shadow: var(--shadow-sm);
  transition:transform var(--transition), box-shadow var(--transition);
}
.metric-card:hover {
  transform:translateY(-4px);
  box-shadow: var(--shadow-lg);
}
.metric-value { font-size:2.25rem; font-weight:900; color:var(--accent); line-height:1.1; margin-bottom:10px; }
.metric-unit { font-size:1rem; font-weight:400; color:var(--text-secondary); }
.metric-label { font-size:1rem; font-weight:600; color:var(--text-primary); margin-bottom:8px; }
.metric-desc { font-size:0.875rem; color:var(--text-muted); line-height:1.5; }

/* Category Cards */
.category-grid { display:grid; grid-template-columns:repeat(3,1fr); gap:20px; margin-bottom:24px; }
.category-card {
  background:var(--bg-card); border:1px solid var(--border);
  border-radius:var(--radius-lg); padding:32px 28px; text-align:center;
  box-shadow: var(--shadow-sm);
  transition:transform var(--transition), box-shadow var(--transition);
}
.category-card:hover {
  transform:translateY(-4px);
  box-shadow: var(--shadow-lg);
}
.category-icon { font-size:2.8rem; margin-bottom:16px; display:block; }
.category-card h4 { font-size:1.1rem; font-weight:700; color:var(--text-primary); margin-bottom:10px; }
.category-card p { font-size:0.875rem; color:var(--text-secondary); line-height:1.6; margin-bottom:14px; }

/* ═══════════════ Benefit Blocks (Cloud, Gateway, SDK) ═══════════════ */
.benefit-blocks { display:flex; flex-direction:column; gap:20px; }
.benefit-block {
  display:flex; gap:28px; align-items:flex-start;
  background:var(--bg-card); border:1px solid var(--border);
  border-radius:var(--radius-lg); padding:36px 32px;
  box-shadow: var(--shadow-sm);
  transition:border-color var(--transition), transform var(--transition), box-shadow var(--transition);
}
.benefit-block:hover {
  border-color: rgba(37,99,235,0.25);
  transform:translateX(4px);
  box-shadow: var(--shadow-md);
}
.benefit-icon {
  font-size:2.2rem; flex-shrink:0;
  width:60px; height:60px; display:flex; align-items:center; justify-content:center;
  background:var(--accent-dim); border-radius:16px;
}
.benefit-text { flex:1; }
.benefit-text h4 { font-size:1.15rem; font-weight:700; color:var(--text-primary); margin-bottom:10px; }
.benefit-text p { font-size:1rem; color:var(--text-secondary); line-height:1.8; }
.benefit-text code {
  background:var(--accent-dim); color:var(--accent);
  padding:2px 8px; border-radius:4px;
  font-family:'SF Mono','Fira Code','Consolas',monospace; font-size:0.9em;
}

/* API Tags */
.api-tags { display:flex; flex-wrap:wrap; gap:8px; margin-top:12px; }
.api-tags code {
  background:var(--accent-dim); color:var(--accent);
  padding:6px 14px; border-radius:20px; font-size:0.875rem;
  font-family:'SF Mono','Fira Code','Consolas',monospace;
  border:1px solid rgba(37,99,235,0.15);
}

/* ═══════════════ Tables ═══════════════ */
.table-wrapper { overflow-x:auto; margin-bottom:32px; border-radius:var(--radius-lg); border:1px solid var(--border); }
.data-table { width:100%; border-collapse:collapse; background:var(--bg-card); font-size:1rem; }
.data-table thead th {
  background:var(--bg-tertiary); color:var(--text-primary); font-weight:700;
  padding:14px 18px; text-align:left; white-space:nowrap;
  border-bottom:2px solid var(--border);
}
.data-table tbody td {
  padding:12px 18px; border-bottom:1px solid var(--border-light); color:var(--text-secondary);
}
.data-table tbody tr:hover { background: var(--accent-dim); }

/* Badges */
.badge { display:inline-block; padding:4px 12px; border-radius:12px; font-size:0.875rem; font-weight:600; white-space:nowrap; }
.badge-p0 { background:rgba(245,158,11,0.12); color:#B45309; }
.badge-p1 { background:rgba(37,99,235,0.1); color:var(--accent); }
.badge-p2 { background:rgba(148,163,184,0.12); color:var(--text-muted); }

/* ═══════════════ Collapsible / Accordion ═══════════════ */
.collapsible-trigger {
  display:flex; align-items:center; gap:12px;
  width:100%; padding:18px 24px;
  background:var(--bg-card); border:1px solid var(--border);
  border-radius:var(--radius); font-size:1rem; font-weight:600;
  color:var(--text-primary); cursor:pointer;
  transition:all var(--transition); text-align:left;
  font-family: var(--font);
}
.collapsible-trigger:hover {
  border-color:var(--accent); background:var(--accent-dim);
}
.collapsible-trigger::after {
  content:'+'; margin-left:auto; font-size:1.4rem; font-weight:300;
  color:var(--text-muted); transition:transform 0.3s ease;
}
.collapsible-trigger.active { border-color:var(--accent); border-radius:var(--radius) var(--radius) 0 0; }
.collapsible-trigger.active::after { content:'\2212'; transform:rotate(180deg); }
.collapsible-content {
  max-height:0; overflow:hidden;
  background:var(--bg-card); border:1px solid transparent; border-top:none;
  border-radius:0 0 var(--radius) var(--radius);
  transition:max-height 0.4s ease, border-color 0.3s ease, padding 0.3s ease;
}
.collapsible-content.open {
  max-height:2000px;
  border-color:var(--border);
  padding:24px 28px;
}
.collapsible-content p { color:var(--text-secondary); font-size:1rem; line-height:1.8; }
.collapsible-content ul { list-style:none; padding:0; margin-top:12px; }
.collapsible-content li { padding:6px 0 6px 20px; position:relative; color:var(--text-secondary); font-size:0.875rem; }
.collapsible-content li::before { content:'\25B8'; position:absolute; left:0; color:var(--accent); font-size:0.8rem; }

/* ═══════════════ Section: About Us ═══════════════ */
#about { background: var(--bg-primary); }
.about-intro {
  font-size:1rem; color:var(--text-secondary); line-height:1.9;
  margin-bottom:48px;
}
.about-grid { display:grid; grid-template-columns:1fr 1fr; gap:32px; margin-bottom:48px; }
.about-card {
  background:var(--bg-card); border:1px solid var(--border);
  border-radius:var(--radius-lg); padding:36px;
  box-shadow: var(--shadow-sm);
}
.about-card h3 {
  font-size:1.15rem; font-weight:700; color:var(--text-primary);
  margin-bottom:16px; display:flex; align-items:center; gap:10px;
}
.about-card h3 .about-card-icon { font-size:1.4rem; }
.about-card p, .about-card li { color:var(--text-secondary); font-size:1rem; line-height:1.8; }
.about-card ul { list-style:none; padding:0; }
.about-card li { padding:4px 0 4px 20px; position:relative; }
.about-card li::before { content:'\2022'; position:absolute; left:4px; color:var(--accent); }

/* Milestones */
.milestone-timeline { display:flex; flex-direction:column; gap:0; margin:32px 0; position:relative; }
.milestone-timeline::before {
  content:''; position:absolute; left:20px; top:0; bottom:0;
  width:2px; background: linear-gradient(180deg, var(--accent), var(--border));
}
.milestone-item {
  display:flex; gap:20px; padding:16px 0 16px 48px; position:relative;
}
.milestone-item::before {
  content:''; position:absolute; left:14px; top:24px;
  width:14px; height:14px; border-radius:50%;
  background:var(--accent); border:3px solid var(--bg-primary);
  box-shadow: 0 0 0 2px var(--accent);
}
.milestone-year {
  font-weight:800; color:var(--accent); font-size:1rem;
  min-width:80px; flex-shrink:0;
}
.milestone-desc { color:var(--text-secondary); font-size:0.875rem; line-height:1.6; }
.milestone-desc strong { color:var(--text-primary); }

/* Contact info cards in About */
.about-contact-grid { display:grid; grid-template-columns:repeat(3,1fr); gap:20px; margin-top:24px; }
.about-contact-item {
  display:flex; align-items:flex-start; gap:14px;
  padding:20px; background:var(--accent-dim);
  border-radius:var(--radius); border:1px solid rgba(37,99,235,0.1);
}
.about-contact-icon { font-size:1.5rem; flex-shrink:0; }
.about-contact-item strong { display:block; font-size:1rem; color:var(--text-primary); margin-bottom:4px; }
.about-contact-item span { font-size:0.875rem; color:var(--text-secondary); }

/* ═══════════════ Section: Development Flow / Visual ═══════════════ */
.dev-flow {
  display:flex; align-items:flex-start; justify-content:center;
  gap:0; flex-wrap:wrap; margin:40px 0;
}
.dev-flow-step {
  display:flex; flex-direction:column; align-items:center;
  text-align:center; padding:20px; min-width:140px;
}
.dev-flow-icon {
  width:72px; height:72px; border-radius:50%;
  background: var(--accent-dim); border:2px solid rgba(37,99,235,0.2);
  display:flex; align-items:center; justify-content:center;
  font-size:2rem; margin-bottom:12px;
}
.dev-flow-step h5 { font-size:1rem; font-weight:700; color:var(--text-primary); margin-bottom:4px; }
.dev-flow-step p { font-size:0.875rem; color:var(--text-muted); max-width:160px; }
.dev-flow-arrow { font-size:1.5rem; color:var(--accent); font-weight:300; margin:24px -8px 0; }

/* Feature illustration cards */
.illustration-grid { display:grid; grid-template-columns:repeat(2,1fr); gap:24px; margin:40px 0; }
.illustration-card {
  background:var(--bg-card); border:1px solid var(--border);
  border-radius:var(--radius-lg); padding:0; overflow:hidden;
  box-shadow: var(--shadow-sm);
  display:flex; flex-direction:column;
}
.illustration-card .illustration-visual {
  height:200px; display:flex; align-items:center; justify-content:center;
  background: linear-gradient(135deg, var(--accent-dim), rgba(37,99,235,0.02));
  position:relative; overflow:hidden;
}
.illustration-card .illustration-body { padding:28px 32px; }
.illustration-card h4 { font-size:1.15rem; font-weight:700; color:var(--text-primary); margin-bottom:10px; }
.illustration-card p { font-size:1rem; color:var(--text-secondary); line-height:1.7; }

/* ═══════════════ Section: Moat ═══════════════ */
.moat-grid { display:grid; grid-template-columns:repeat(2,1fr); gap:16px; }
.moat-item {
  display:flex; gap:18px; align-items:flex-start;
  background:var(--bg-card); border:1px solid var(--border);
  border-radius:var(--radius-lg); padding:28px;
  box-shadow: var(--shadow-sm);
  transition:border-color var(--transition), box-shadow var(--transition);
}
.moat-item:hover {
  border-color: rgba(37,99,235,0.25);
  box-shadow: var(--shadow-md);
}
.moat-num { font-size:1.75rem; font-weight:900; color:var(--accent); flex-shrink:0; line-height:1; opacity:0.7; }
.moat-item strong { display:block; font-size:1rem; color:var(--text-primary); margin-bottom:6px; }
.moat-item p { font-size:0.875rem; color:var(--text-secondary); line-height:1.6; }

/* ═══════════════ Section: Contact ═══════════════ */
#contact { background: linear-gradient(180deg, var(--bg-primary) 0%, #EEF2FF 100%); text-align:center; }
.contact-content h2 { font-size:2.25rem; font-weight:900; color:var(--text-primary); margin-bottom:16px; letter-spacing:-0.5px; }
.contact-divider { width:60px; height:4px; background:linear-gradient(90deg,var(--accent),var(--accent-light)); margin:24px auto; border-radius:2px; }
.contact-tagline { font-size:1.15rem; color:var(--text-secondary); margin-bottom:8px; }
.contact-desc { font-size:1.15rem; color:var(--accent); margin-bottom:48px; font-weight:500; }
.contact-cards { display:grid; grid-template-columns:repeat(3,1fr); gap:20px; margin-bottom:48px; text-align:left; }
.contact-card {
  background:var(--bg-card); border:1px solid var(--border);
  border-radius:var(--radius-lg); padding:32px 28px;
  box-shadow: var(--shadow-sm);
  transition:transform var(--transition), box-shadow var(--transition);
}
.contact-card:hover {
  transform:translateY(-4px);
  box-shadow: var(--shadow-lg);
}
.contact-card h4 { font-size:1.15rem; font-weight:700; color:var(--text-primary); margin-bottom:10px; }
.contact-card p { font-size:1rem; color:var(--text-secondary); line-height:1.7; }
.contact-cta-box {
  background:var(--accent-dim); border:1px solid rgba(37,99,235,0.15);
  border-radius:var(--radius-lg); padding:44px 40px;
}
.contact-cta-box h3 { font-size:1.3rem; color:var(--text-primary); margin-bottom:14px; }
.contact-cta-box p { font-size:1rem; color:var(--text-secondary); margin-bottom:20px; line-height:1.7; }
.contact-cta-box .btn-primary { margin-top:8px; }

/* Contact detail row */
.contact-detail-row {
  display:flex; justify-content:center; gap:40px; flex-wrap:wrap;
  margin-bottom:40px; padding:24px 32px;
  background:var(--bg-card); border:1px solid var(--border);
  border-radius:var(--radius-lg);
}
.contact-detail-item {
  display:flex; align-items:center; gap:10px;
  font-size:1rem; color:var(--text-secondary);
}
.contact-detail-item .detail-icon { font-size:1.2rem; }
.contact-detail-item strong { color:var(--text-primary); }

/* ═══════════════ Footer ═══════════════ */
footer {
  background: var(--text-primary); color: #CBD5E1;
  border-top: 1px solid rgba(255,255,255,0.06);
  padding:48px 0 24px;
}
footer a { color: #94A3B8; }
footer a:hover { color: #FFFFFF; }
.footer-content { display:flex; justify-content:space-between; align-items:flex-start; flex-wrap:wrap; gap:32px; margin-bottom:40px; }
.footer-brand .nav-logo { color:#FFFFFF; font-size:1.3rem; }
.footer-brand .nav-logo .accent { color: var(--accent-light); }
.footer-brand p { font-size:0.875rem; color:#94A3B8; margin-top:8px; }
.footer-contact { font-size:0.875rem; color:#94A3B8; line-height:1.8; }
.footer-contact strong { color:#CBD5E1; display:block; margin-bottom:8px; font-size:1rem; }
.footer-links { display:flex; flex-wrap:wrap; gap:20px; }
.footer-links a { font-size:0.875rem; }
.footer-links a:hover { color: var(--accent-light); }
.footer-bottom { border-top:1px solid rgba(255,255,255,0.08); padding-top:20px; text-align:center; display:flex; justify-content:space-between; flex-wrap:wrap; gap:16px; }
.footer-bottom p { font-size:0.875rem; color:#64748B; }
.footer-bottom a { color:#64748B; font-size:0.875rem; }
.footer-bottom a:hover { color:var(--accent-light); }

/* ═══════════════ Back to Top ═══════════════ */
#backToTop {
  position:fixed; bottom:32px; right:32px; width:44px; height:44px;
  background:var(--accent); color:#FFFFFF; border:none;
  border-radius:50%; font-size:1.2rem; font-weight:700; cursor:pointer;
  opacity:0; visibility:hidden; transition:all var(--transition);
  z-index:999; box-shadow: 0 4px 16px rgba(37,99,235,0.35);
}
#backToTop.visible { opacity:1; visibility:visible; }
#backToTop:hover { transform:translateY(-3px); box-shadow: 0 8px 24px rgba(37,99,235,0.5); }

/* ═══════════════════════════════════════
   RESPONSIVE
   ═══════════════════════════════════════ */

@media (max-width: 1024px) {
  section { padding:70px 0; }
  .container { padding: 0 24px; }
  .nav-container { padding: 0 24px; }
  .hero-title-main { font-size:2.25rem; }
  .hero-title-sub { font-size:1.25rem; }
  .hero-stats-row { gap:28px; }
  .vision-grid { grid-template-columns:1fr; }
  .pillars-grid { grid-template-columns:repeat(2,1fr); }
  .outcome-metrics { grid-template-columns:repeat(2,1fr); }
  .category-grid { grid-template-columns:repeat(2,1fr); }
  .moat-grid { grid-template-columns:1fr; }
  .contact-cards { grid-template-columns:1fr; }
  .about-grid { grid-template-columns:1fr; }
  .about-contact-grid { grid-template-columns:1fr; }
  .illustration-grid { grid-template-columns:1fr; }
  .dev-flow { gap:8px; }
  .dev-flow-arrow { transform:rotate(90deg); margin:4px 0; }
}

@media (max-width: 768px) {
  section { padding:56px 0; }
  .container { padding: 0 20px; }
  .nav-container { padding: 0 20px; }
  .section-header h2 { font-size:1.8rem; }
  .section-subtitle { font-size:1rem; }

  .nav-links {
    display:none; position:fixed; top:var(--nav-height); left:0; right:0;
    background:rgba(255,255,255,0.98); backdrop-filter: blur(20px);
    border-bottom:1px solid var(--border);
    flex-direction:column; padding:16px; max-height:80vh; overflow-y:auto;
  }
  .nav-links.open { display:flex; }
  .nav-toggle { display:flex; }

  .hero-title-main { font-size:2rem; }
  .hero-title-sub { font-size:1rem; }
  .hero-tagline { font-size:1rem; }
  .hero-cta { flex-direction:column; align-items:center; }
  .hero-stats-row { gap:20px; }
  .hero-stat-num { font-size:1.4rem; }

  .vision-grid, .pillars-grid, .outcome-metrics,
  .category-grid, .moat-grid, .contact-cards,
  .about-grid, .about-contact-grid, .illustration-grid { grid-template-columns:1fr; }

  .benefit-block { flex-direction:column; align-items:flex-start; }
  .benefit-icon { width:48px; height:48px; font-size:1.6rem; }
  .contact-content h2 { font-size:2rem; }
  .contact-tagline { font-size:1rem; }
  .contact-detail-row { flex-direction:column; gap:16px; text-align:center; }

  .chart-wrapper { padding:16px; }
  .footer-content { flex-direction:column; }
  .footer-bottom { flex-direction:column; text-align:center; }

  .dev-flow { flex-direction:column; }
  .dev-flow-arrow { transform:rotate(90deg); margin:4px 0; }
}