:root {
  --bg: #f8fafc;
  --surface: #ffffff;
  --text: #0f172a;
  --muted: #64748b;
  --accent: #6366f1;
  --accent-soft: #eef2ff;
  --border: #e2e8f0;
  --success: #10b981;
  --radius: 16px;
  --shadow: 0 10px 40px rgba(15, 23, 42, 0.06);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.container { max-width: 1100px; margin: 0 auto; padding: 0 20px; }

.site-header {
  position: sticky; top: 0; z-index: 10;
  background: rgba(248, 250, 252, 0.9);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  min-height: 64px;
}
.logo { font-weight: 700; font-size: 1.25rem; color: var(--text); }
.nav { display: flex; gap: 20px; align-items: center; flex-wrap: wrap; }
.nav a { color: var(--muted); font-size: 0.95rem; }
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 12px 22px; border-radius: 999px; border: none;
  font-weight: 600; cursor: pointer; transition: transform .15s, box-shadow .15s;
}
.btn-primary {
  background: var(--accent); color: #fff;
  box-shadow: 0 8px 24px rgba(99, 102, 241, 0.25);
}
.btn-primary:hover { transform: translateY(-1px); text-decoration: none; color: #fff; }
.btn-ghost { background: var(--surface); border: 1px solid var(--border); color: var(--text); }

.hero {
  padding: 72px 0 48px;
  text-align: center;
}
.hero-badge {
  display: inline-block; padding: 6px 14px; border-radius: 999px;
  background: var(--accent-soft); color: var(--accent); font-size: 0.85rem; font-weight: 600;
  margin-bottom: 16px;
}
.hero h1 {
  font-size: clamp(2rem, 5vw, 3.2rem);
  line-height: 1.15; margin: 0 0 16px;
}
.hero p { color: var(--muted); font-size: 1.15rem; max-width: 640px; margin: 0 auto 28px; }
.hero-actions { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }

.section { padding: 56px 0; }
.section-title { text-align: center; margin-bottom: 36px; }
.section-title h2 { margin: 0 0 8px; font-size: 2rem; }
.section-title p { color: var(--muted); margin: 0; }

.steps {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 20px;
}
.step-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 24px; box-shadow: var(--shadow);
}
.step-num {
  width: 36px; height: 36px; border-radius: 10px;
  background: var(--accent-soft); color: var(--accent);
  display: flex; align-items: center; justify-content: center; font-weight: 700;
  margin-bottom: 12px;
}

.features-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 20px;
}
.feature-card {
  background: var(--surface); border-radius: var(--radius);
  border: 1px solid var(--border); padding: 28px;
}
.feature-card h3 { margin-top: 0; }

.pricing-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 16px;
}
.price-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 24px; text-align: center;
}
.price-card.highlight { border-color: var(--accent); box-shadow: var(--shadow); }
.price-card .amount { font-size: 2rem; font-weight: 700; }

.upload-panel {
  background: var(--surface); border: 2px dashed var(--border);
  border-radius: var(--radius); padding: 32px; max-width: 560px; margin: 0 auto;
  text-align: center;
}
.upload-panel input[type=file] { margin: 16px 0; }
.upload-panel select { width: 100%; padding: 10px; border-radius: 8px; border: 1px solid var(--border); }

.faq details {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 12px; padding: 16px 20px; margin-bottom: 10px;
}
.faq summary { cursor: pointer; font-weight: 600; }

.site-footer {
  border-top: 1px solid var(--border);
  padding: 32px 0; color: var(--muted); font-size: 0.9rem;
  text-align: center;
}

@media (max-width: 640px) {
  .nav { gap: 12px; }
  .hero { padding-top: 48px; }
}