:root {
  --bg: #ffffff;
  --bg-alt: #f5f6fb;
  --fg: #111827;
  --muted: #6b7280;
  --border: #e5e7eb;
  --card: #ffffff;
  --primary: #4f46e5;
  --primary-2: #7c3aed;
  --primary-fg: #ffffff;
  --shadow: 0 10px 30px rgba(17, 24, 39, 0.08);
  --radius: 14px;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme='light']) {
    --bg: #0b0d14;
    --bg-alt: #121521;
    --fg: #e5e7eb;
    --muted: #9ca3af;
    --border: #262a3a;
    --card: #151827;
    --primary: #818cf8;
    --primary-2: #a78bfa;
    --primary-fg: #0b0d14;
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
  }
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background: var(--bg);
  color: var(--fg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--primary); text-decoration: none; }
img { max-width: 100%; }
.wrap { max-width: 1120px; margin: 0 auto; padding: 0 16px; }
.narrow { max-width: 760px; }
.center { text-align: center; }
.muted { color: var(--muted); }
.small { font-size: 0.875rem; }

.nav { position: sticky; top: 0; z-index: 10; background: color-mix(in srgb, var(--bg) 85%, transparent); backdrop-filter: blur(10px); border-bottom: 1px solid var(--border); }
.nav-inner { display: flex; align-items: center; gap: 24px; height: 64px; }
.nav nav { display: flex; gap: 20px; margin-left: auto; }
.nav nav a { color: var(--fg); font-weight: 500; }
.brand { display: inline-flex; align-items: center; gap: 8px; font-weight: 800; color: var(--fg); font-size: 1.1rem; }

.btn { display: inline-flex; align-items: center; justify-content: center; gap: 6px; padding: 10px 18px; border-radius: 10px; font-weight: 600; border: 1px solid transparent; cursor: pointer; white-space: nowrap; }
.btn-lg { padding: 14px 24px; font-size: 1.05rem; }
.btn-primary { background: linear-gradient(135deg, var(--primary), var(--primary-2)); color: var(--primary-fg); }
.btn-ghost { border-color: var(--border); color: var(--fg); }
.btn-light { background: #fff; color: #4f46e5; }

.hero { padding: 72px 0 56px; background: radial-gradient(1000px 400px at 80% -10%, color-mix(in srgb, var(--primary) 18%, transparent), transparent); }
.small-hero { padding: 48px 0 32px; }
.hero-inner { display: grid; grid-template-columns: 1.1fr 1fr; gap: 48px; align-items: center; }
.eyebrow { color: var(--primary); font-weight: 700; text-transform: uppercase; letter-spacing: 0.06em; font-size: 0.8rem; margin: 0 0 8px; }
h1 { font-size: clamp(2rem, 4.5vw, 3.2rem); line-height: 1.15; margin: 0 0 16px; letter-spacing: -0.02em; }
h2 { font-size: clamp(1.5rem, 3vw, 2.1rem); line-height: 1.25; margin: 0 0 24px; letter-spacing: -0.01em; }
.section h2 { text-align: center; }
.narrow h2 { text-align: left; margin-top: 32px; }
.grad { background: linear-gradient(135deg, var(--primary), var(--primary-2)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.lead { font-size: 1.125rem; color: var(--muted); margin: 0 0 24px; }
.lead.center { margin-top: -12px; }
.cta { display: flex; gap: 12px; flex-wrap: wrap; margin-bottom: 12px; }

.mock { background: var(--card); border: 1px solid var(--border); border-radius: 18px; box-shadow: var(--shadow); padding: 16px; }
.mock-bar { display: flex; gap: 6px; margin-bottom: 14px; }
.mock-bar i { width: 10px; height: 10px; border-radius: 50%; background: var(--border); }
.mock-kpis { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
.mock-kpis div { background: var(--bg-alt); border-radius: 10px; padding: 10px; }
.mock-kpis small { display: block; color: var(--muted); font-size: 0.72rem; }
.mock-kpis b { font-size: 0.95rem; }
.mock-chart { display: flex; align-items: flex-end; gap: 6px; height: 110px; margin: 16px 0; }
.mock-chart span { flex: 1; border-radius: 4px 4px 0 0; background: linear-gradient(180deg, var(--primary), var(--primary-2)); opacity: 0.85; }
.mock-rows div { display: grid; grid-template-columns: auto 1fr auto; gap: 10px; align-items: center; padding: 8px 0; border-top: 1px solid var(--border); font-size: 0.85rem; }

.plat { display: inline-block; padding: 2px 10px; border-radius: 999px; font-size: 0.78rem; font-weight: 700; color: #fff; }
.plat-shopee { background: #ee4d2d; }
.plat-lazada { background: #0f146d; }
.plat-tiktok-shop { background: #111; }
.plat-woocommerce { background: #7f54b3; }

.section { padding: 72px 0; }
.section.alt { background: var(--bg-alt); }
.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.card { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 24px; }
.card h3 { margin: 8px 0; font-size: 1.1rem; }
.card p { margin: 0; color: var(--muted); }
.icon { font-size: 1.8rem; }
.platform-card { display: flex; flex-direction: column; gap: 12px; align-items: flex-start; color: var(--fg); transition: transform 0.15s; }
.platform-card:hover { transform: translateY(-3px); }
.platform-card .plat { font-size: 1rem; padding: 4px 14px; }

.steps { list-style: none; padding: 0; margin: 0; display: grid; gap: 16px; counter-reset: s; }
.section > .wrap > .steps { grid-template-columns: repeat(3, 1fr); }
.steps li { counter-increment: s; background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px 20px 20px 68px; position: relative; display: flex; flex-direction: column; gap: 4px; }
.steps li::before { content: counter(s); position: absolute; left: 20px; top: 20px; width: 32px; height: 32px; border-radius: 50%; background: linear-gradient(135deg, var(--primary), var(--primary-2)); color: var(--primary-fg); display: grid; place-items: center; font-weight: 800; }
.steps span { color: var(--muted); }
.checks { padding: 0; list-style: none; }
.checks li { padding: 6px 0 6px 28px; position: relative; }
.checks li::before { content: '✓'; position: absolute; left: 0; color: #10b981; font-weight: 800; }
.crumbs { font-size: 0.875rem; color: var(--muted); margin-bottom: 12px; }

.two-col { display: grid; grid-template-columns: 1.3fr 1fr; gap: 48px; align-items: center; }
.two-col h2 { text-align: left; }
.phone { width: 220px; height: 420px; margin: 0 auto; border-radius: 36px; border: 10px solid var(--fg); background: var(--card); padding: 18px 14px; box-shadow: var(--shadow); }
.phone-screen { display: flex; flex-direction: column; gap: 10px; }
.phone-screen span { color: var(--muted); font-size: 0.85rem; }
.phone-screen i { display: block; height: 64px; border-radius: 12px; background: var(--bg-alt); }

.faq { border: 1px solid var(--border); border-radius: 12px; padding: 14px 18px; margin-bottom: 10px; background: var(--card); }
.faq summary { font-weight: 600; cursor: pointer; }
.faq p { margin: 10px 0 0; color: var(--muted); }

.cta-band { background: linear-gradient(135deg, #4f46e5, #7c3aed); color: #fff; }
.cta-band h2 { color: #fff; }

.footer { border-top: 1px solid var(--border); padding: 40px 0 20px; font-size: 0.92rem; }
.footer-inner { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 32px; }
.footer h3 { font-size: 0.95rem; margin: 0 0 8px; }
.footer-inner a:not(.brand) { display: block; color: var(--muted); padding: 2px 0; }
.footer p { color: var(--muted); }
.copy { margin-top: 24px; }

@media (max-width: 860px) {
  .hero-inner, .two-col { grid-template-columns: 1fr; }
  .grid { grid-template-columns: 1fr 1fr; }
  .grid-4 { grid-template-columns: 1fr 1fr; }
  .section > .wrap > .steps { grid-template-columns: 1fr; }
  .nav nav { display: none; }
  .nav .btn { margin-left: auto; }
  .footer-inner { grid-template-columns: 1fr 1fr; }
  .footer-inner > div:first-child { grid-column: 1 / -1; }
}
@media (max-width: 520px) {
  .hero { padding: 40px 0 32px; }
  .section { padding: 48px 0; }
  .grid { grid-template-columns: 1fr; }
  .mock-kpis b { font-size: 0.8rem; }
  .cta .btn { flex: 1; }
}