:root {
  --bg: #fafbfc;
  --surface: #ffffff;
  --surface-alt: #f9fafb;
  --border: #e5e7eb;
  --text-main: #111827;
  --text-muted: #6b7280;
  --accent: #2563eb;
  --accent-hover: #1e4fc9;
  --accent-soft: #eff6ff;
  --success: #10b981;
  --success-soft: #d1fae5;
  --radius: 14px;
  --shadow: 0 2px 10px rgba(15,23,42,0.04);
  --shadow-lg: 0 10px 40px rgba(15,23,42,0.08);
  --font: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 0;
  font-family: var(--font);
  background: var(--bg);
  color: var(--text-main);
  -webkit-font-smoothing: antialiased;
}

header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  background: rgba(255,255,255,0.96);
  backdrop-filter: blur(8px);
  z-index: 10;
}

.brand {
  font-size: 18px;
  font-weight: 600;
  color: var(--text-main);
  text-decoration: none;
}

nav a {
  margin-left: 18px;
  font-size: 14px;
  color: var(--text-muted);
  text-decoration: none;
}

nav a:hover {
  color: var(--text-main);
}

.container {
  max-width: 960px;
  margin: 0 auto;
  padding: 32px 16px 48px;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px 28px;
  box-shadow: var(--shadow);
  margin-bottom: 24px;
}

h1 {
  font-size: 30px;
  margin: 0 0 12px;
  color: var(--text-main);
  font-weight: 700;
}

h2 {
  font-size: 22px;
  margin: 0 0 16px;
  color: var(--text-main);
  font-weight: 700;
}

.subtitle {
  font-size: 16px;
  color: var(--text-muted);
  margin-bottom: 22px;
  line-height: 1.6;
}

p {
  font-size: 15px;
  line-height: 1.6;
  color: var(--text-muted);
  margin: 0 0 12px;
}

ul {
  padding-left: 20px;
  margin: 0 0 20px;
}

ul li {
  margin-bottom: 10px;
  font-size: 15px;
  color: var(--text-main);
  line-height: 1.5;
}

.button {
  display: inline-block;
  background: var(--accent);
  color: #ffffff;
  padding: 14px 32px;
  border-radius: 10px;
  text-decoration: none;
  font-size: 16px;
  font-weight: 600;
  transition: all 0.2s ease;
  box-shadow: 0 4px 14px rgba(37,99,235,0.25);
}

.button:hover {
  background: var(--accent-hover);
  box-shadow: 0 6px 20px rgba(37,99,235,0.35);
  transform: translateY(-1px);
}

.hero {
  background: linear-gradient(135deg, #eff6ff 0%, #ffffff 100%);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 48px 32px;
  box-shadow: var(--shadow-lg);
  margin-bottom: 32px;
  text-align: center;
}

.hero h1 {
  font-size: 36px;
  margin: 0 0 16px;
  line-height: 1.2;
}

.hero .subtitle {
  font-size: 18px;
  max-width: 680px;
  margin: 0 auto 28px;
}

.badge {
  display: inline-block;
  background: var(--success-soft);
  color: var(--success);
  padding: 6px 14px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 20px;
}

.value-props {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
  margin: 28px 0;
}

.value-prop {
  padding: 20px;
  background: var(--surface-alt);
  border-radius: 10px;
  border: 1px solid var(--border);
}

.value-prop-icon {
  font-size: 28px;
  margin-bottom: 8px;
}

.value-prop h3 {
  font-size: 16px;
  margin: 0 0 6px;
  color: var(--text-main);
}

.value-prop p {
  font-size: 14px;
  margin: 0;
  color: var(--text-muted);
}

.testimonial {
  background: var(--accent-soft);
  border-left: 4px solid var(--accent);
  padding: 20px 24px;
  border-radius: 8px;
  margin: 20px 0;
}

.testimonial-text {
  font-size: 15px;
  font-style: italic;
  color: var(--text-main);
  margin: 0 0 12px;
  line-height: 1.6;
}

.testimonial-author {
  font-size: 14px;
  color: var(--text-muted);
  font-weight: 600;
}

.examples-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin: 20px 0;
}

.example-item {
  padding: 16px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
}

.example-item strong {
  display: block;
  color: var(--text-main);
  margin-bottom: 4px;
  font-size: 15px;
}

.example-item span {
  font-size: 14px;
  color: var(--text-muted);
}

.faq-item {
  margin-bottom: 20px;
}

.faq-question {
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 6px;
  font-size: 15px;
}

.faq-answer {
  color: var(--text-muted);
  font-size: 14px;
  line-height: 1.6;
  margin: 0;
}

.guarantee-box {
  background: var(--success-soft);
  border: 2px solid var(--success);
  border-radius: 10px;
  padding: 20px 24px;
  margin: 24px 0;
  text-align: center;
}

.guarantee-box strong {
  display: block;
  font-size: 18px;
  color: var(--success);
  margin-bottom: 8px;
}

.guarantee-box p {
  margin: 0;
  color: var(--text-main);
}

.small-note {
  margin-top: 12px;
  font-size: 13px;
  color: var(--text-muted);
}

footer {
  text-align: center;
  padding: 24px 16px 30px;
  font-size: 13px;
  color: var(--text-muted);
  border-top: 1px solid var(--border);
  margin-top: 40px;
}

footer span {
  white-space: nowrap;
}

@media (max-width: 640px) {
  header {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }

  nav a {
    margin-left: 0;
    margin-right: 14px;
  }

  .hero h1 {
    font-size: 28px;
  }

  .hero .subtitle {
    font-size: 16px;
  }

  .value-props,
  .examples-grid {
    grid-template-columns: 1fr;
  }
}