:root {
  --bg: #f1f5f9;
  --card: #ffffff;
  --text: #0f172a;
  --muted: #64748b;
  --border: #e2e8f0;
  --brand: #10b981;
  --brand-dark: #059669;
  --radius: 16px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Helvetica Neue", sans-serif;
}

.wrap {
  width: min(1080px, 92vw);
  margin: 0 auto;
}

.site-header {
  background: #fff;
  border-bottom: 1px solid var(--border);
}

.header-inner {
  min-height: 78px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--text);
  font-weight: 700;
}

.brand-icon {
  width: 32px;
  height: 32px;
  border-radius: 9px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 15px;
  background: linear-gradient(180deg, #22c55e 0%, #0ea5a1 100%);
}

.brand-name { font-size: 20px; letter-spacing: 0.01em; }

.header-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

.nav-link {
  text-decoration: none;
  color: #475569;
  font-weight: 600;
}

.hero {
  padding: 82px 0 70px;
  text-align: center;
}

.hero-badge { margin: 0 0 16px; color: var(--brand-dark); font-weight: 700; font-size: 14px; }

.hero h1 { margin: 0 0 16px; font-size: clamp(38px, 5vw, 56px); line-height: 1.18; letter-spacing: 0.01em; }

.hero-lead { margin: 0 auto 24px; max-width: 760px; color: var(--muted); font-size: 17px; line-height: 1.75; }

.hero-cta {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 16px;
}

.hero-note { margin: 0; font-size: 13px; color: var(--muted); }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  border-radius: 12px;
  padding: 12px 20px;
  font-weight: 700;
  font-size: 14px;
  border: 1px solid var(--border);
  color: var(--text);
  background: #fff;
}

.btn-primary {
  color: #fff;
  border: 0;
  background: linear-gradient(180deg, var(--brand) 0%, var(--brand-dark) 100%);
  box-shadow: 0 6px 22px rgba(16, 185, 129, 0.24);
}

.btn-secondary {
  background: #fff;
}

.features-section {
  padding: 28px 0 40px;
}

h2 { text-align: center; margin: 0 0 24px; font-size: 36px; }

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.feature-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
  min-height: 200px;
}

.feature-card .icon {
  font-size: 28px;
  margin-bottom: 10px;
}

.feature-card h3 { margin: 0 0 8px; font-size: 24px; }

.feature-card p { margin: 0; color: var(--muted); font-size: 16px; line-height: 1.6; }

.download-section {
  padding: 26px 0 42px;
}

.download-card {
  background: linear-gradient(180deg, #f1faf6 0%, #ffffff 40%);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 30px 20px;
  text-align: center;
}

.download-card p { margin: 0 0 18px; color: var(--muted); font-size: 15px; }

.download-actions {
  display: flex;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
}

.download-note { margin-top: 14px; font-size: 13px; }

.requirements-section {
  padding-bottom: 50px;
}

.requirements-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 26px;
  max-width: 840px;
  margin: 0 auto;
}

.requirements-card ul { margin: 0; padding-left: 20px; color: var(--muted); font-size: 16px; line-height: 1.8; }

.site-footer {
  border-top: 1px solid var(--border);
  background: #fff;
  padding: 24px 0 32px;
  text-align: center;
}

.site-footer a { color: #475569; text-decoration: none; font-size: 14px; }

.site-footer p { margin: 10px 0 0; color: var(--muted); font-size: 12px; }

@media (max-width: 1100px) {
  .brand-name { font-size: 18px; }
  .btn {
    font-size: 16px;
  }
  .hero-badge {
    font-size: 14px;
  }
  .hero h1 {
    font-size: clamp(36px, 7vw, 52px);
  }
  .hero-lead {
    font-size: 18px;
  }
  h2 {
    font-size: 30px;
  }
  .feature-card h3 { font-size: 20px; }
}

@media (max-width: 860px) {
  .features-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 560px) {
  .header-inner {
    min-height: 64px;
  }
  .features-grid {
    grid-template-columns: 1fr;
  }
  .hero {
    padding-top: 56px;
  }
}