:root {
  color-scheme: light;
  --bg-page: #f7f9ff;
  --bg-surface: #ffffff;
  --bg-muted: #eef2ff;
  --text-primary: #0f172a;
  --text-secondary: #526084;
  --text-accent: #2563eb;
  --border-soft: rgba(37, 99, 235, 0.14);
  --shadow-soft: 0 32px 60px rgba(15, 23, 42, 0.08);
  --radius-card: 28px;
  font-family: 'SF Pro Display', 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: linear-gradient(180deg, #f8faff 0%, #eef2ff 100%);
  color: var(--text-primary);
  -webkit-font-smoothing: antialiased;
}

header,
main,
footer {
  width: min(1140px, 92vw);
  margin: 0 auto;
}

header {
  padding: 40px 0 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--text-primary);
  font-weight: 600;
  font-size: 18px;
  letter-spacing: -0.01em;
}

.brand img {
  width: 44px;
  height: 44px;
  border-radius: 14px;
  box-shadow: 0 16px 32px rgba(37, 99, 235, 0.18);
}

nav {
  display: flex;
  align-items: center;
  gap: 22px;
}

nav a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 15px;
  letter-spacing: 0.02em;
  transition: color 0.2s ease;
}

nav a:hover,
nav a.active {
  color: var(--text-accent);
}

.hero {
  display: grid;
  gap: 48px;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  align-items: center;
  padding: 24px 0 80px;
}

.hero-text h1 {
  font-size: clamp(36px, 6vw, 60px);
  line-height: 1.05;
  letter-spacing: -0.02em;
  margin: 0 0 24px;
}

.hero-text p {
  font-size: 18px;
  color: var(--text-secondary);
  line-height: 1.6;
  margin: 0 0 32px;
  max-width: 520px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 26px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 16px;
  text-decoration: none;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  cursor: pointer;
}

.btn-primary {
  background: var(--text-accent);
  color: #fff;
  box-shadow: 0 24px 40px rgba(37, 99, 235, 0.24);
  border: none;
}

.btn-secondary {
  background: #fff;
  color: var(--text-primary);
  border: 1px solid var(--border-soft);
}

.btn:hover {
  transform: translateY(-2px);
}

.hero-media {
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero-media img {
  width: min(380px, 90%);
  border-radius: 36px;
  box-shadow: var(--shadow-soft);
}

.feature-section {
  padding: 40px 0 80px;
}

.section-title {
  font-size: 32px;
  margin: 0 0 24px;
  letter-spacing: -0.01em;
}

.section-subtitle {
  font-size: 18px;
  color: var(--text-secondary);
  margin: 0 0 48px;
  max-width: 620px;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 24px;
}

.feature-card {
  padding: 28px;
  border-radius: var(--radius-card);
  background: var(--bg-surface);
  border: 1px solid rgba(15, 23, 42, 0.06);
  box-shadow: 0 18px 40px rgba(15, 23, 42, 0.05);
  display: grid;
  gap: 14px;
}

.feature-card h3 {
  margin: 0;
  font-size: 20px;
  letter-spacing: -0.01em;
}

.feature-card p {
  margin: 0;
  color: var(--text-secondary);
  line-height: 1.6;
}

.highlight-card {
  background: var(--bg-surface);
  border-radius: var(--radius-card);
  padding: 32px;
  display: grid;
  gap: 18px;
  border: 1px solid rgba(15, 23, 42, 0.06);
  box-shadow: var(--shadow-soft);
}

.highlight-card ul {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 12px;
}

.highlight-card li {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--text-secondary);
}

.highlight-card li::before {
  content: '✔';
  color: var(--text-accent);
  font-size: 16px;
}

.cta-banner {
  margin: 96px 0 80px;
  background: linear-gradient(135deg, #2563eb, #1640d6);
  border-radius: 36px;
  padding: 72px;
  color: #fff;
  text-align: center;
  display: grid;
  gap: 24px;
  box-shadow: var(--shadow-soft);
}

.cta-banner h2 {
  margin: 0;
  font-size: clamp(32px, 5vw, 44px);
  letter-spacing: -0.01em;
}

.cta-banner p {
  margin: 0 auto;
  font-size: 18px;
  max-width: 560px;
  line-height: 1.6;
}

.cta-banner .cta-actions {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 18px;
}

.cta-banner a {
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
  border-radius: 18px;
  padding: 14px 24px;
  text-decoration: none;
  font-weight: 600;
  min-width: 180px;
  transition: background 0.2s ease, transform 0.2s ease;
}

.cta-banner a:hover {
  background: rgba(255, 255, 255, 0.22);
  transform: translateY(-2px);
}

footer {
  margin: 0 auto 48px;
  padding: 56px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 32px;
  padding: 40px;
  border-radius: 32px;
  background: rgba(255, 255, 255, 0.78);
  border: 1px solid rgba(15, 23, 42, 0.06);
  box-shadow: 0 24px 48px rgba(15, 23, 42, 0.05);
}

.footer-col h4 {
  margin: 0 0 18px;
  font-size: 16px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-secondary);
}

.footer-col ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.footer-col a {
  text-decoration: none;
  color: var(--text-primary);
  font-size: 15px;
}

.footer-note {
  margin: 32px auto 0;
  text-align: center;
  color: var(--text-secondary);
  font-size: 14px;
}

.support-layout,
.policy-layout {
  padding: 48px 0 96px;
  display: grid;
  gap: 40px;
}

.content-card {
  background: var(--bg-surface);
  border-radius: var(--radius-card);
  padding: 32px;
  border: 1px solid rgba(15, 23, 42, 0.05);
  box-shadow: 0 16px 36px rgba(15, 23, 42, 0.05);
}

.content-card h2 {
  margin-top: 0;
}

.content-card p {
  color: var(--text-secondary);
  line-height: 1.7;
}

.contact-options {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 24px;
  margin-top: 24px;
}

.contact-card {
  border-radius: 22px;
  padding: 24px;
  background: var(--bg-muted);
  display: grid;
  gap: 8px;
}

.contact-card strong {
  font-size: 16px;
}

.contact-card a {
  color: var(--text-accent);
  font-weight: 600;
  text-decoration: none;
}

.policy-list {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

.policy-list li strong {
  display: block;
  margin-bottom: 6px;
}

@media (max-width: 720px) {
  header {
    flex-direction: column;
    align-items: flex-start;
  }

  nav {
    width: 100%;
    justify-content: space-between;
  }

  .cta-banner {
    padding: 56px 32px;
  }
}