/* Basis-Styles – nur System-Schriftarten, nichts Exotisches */

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui,
    "PingFang SC", "Microsoft YaHei", sans-serif;
  color: #111827;
  background-color: #f3f4f6;
}

img {
  max-width: 100%;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
}

.container {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 16px;
}

/* Header */

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(243, 244, 246, 0.9);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid #e5e7eb;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 0;
}

.logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
}

.logo-mark {
  width: 28px;
  height: 28px;
  border-radius: 8px;
  background: #111827;
  color: #f9fafb;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
}

.logo-text {
  font-size: 16px;
}

.nav a {
  margin-left: 16px;
  font-size: 14px;
  color: #4b5563;
}

.nav a:hover {
  color: #111827;
}

/* Buttons */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 9999px;
  padding: 10px 18px;
  font-size: 14px;
  font-weight: 500;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}

.btn-primary {
  background: #111827;
  color: #f9fafb;
}

.btn-primary:hover {
  background: #000000;
}

.btn-secondary {
  background: #e5e7eb;
  color: #111827;
}

.btn-secondary:hover {
  background: #d1d5db;
}

.btn-outline {
  background: transparent;
  color: #111827;
  border-color: #111827;
}

.btn-outline:hover {
  background: #111827;
  color: #f9fafb;
}

/* Hero */

.hero {
  padding: 40px 0 32px;
}

.hero-inner {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.hero-text h1 {
  font-size: 30px;
  margin: 0 0 12px;
}

.hero-subtitle {
  margin: 0 0 20px;
  font-size: 15px;
  color: #4b5563;
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 8px;
}

.hero-note {
  font-size: 13px;
  color: #6b7280;
}

.hero-side {
  display: flex;
}

.hero-card {
  background: #111827;
  color: #f9fafb;
  padding: 20px;
  border-radius: 16px;
  font-size: 14px;
}

.hero-card h2 {
  font-size: 18px;
  margin-top: 0;
}

.hero-card ul {
  padding-left: 18px;
  margin: 8px 0 16px;
}

.hero-card li {
  margin-bottom: 6px;
}

.hero-metric {
  font-size: 12px;
  line-height: 1.4;
  border-top: 1px solid rgba(249, 250, 251, 0.15);
  padding-top: 8px;
}

.hero-metric-small {
  display: block;
  margin-top: 4px;
  opacity: 0.8;
}

/* Sections allgemein */

.section {
  padding: 32px 0;
}

.section-alt {
  background: #e5e7eb;
}

.section h2 {
  font-size: 22px;
  margin: 0 0 16px;
}

.section-intro {
  font-size: 14px;
  color: #4b5563;
  margin-bottom: 16px;
}

/* Steps */

.steps {
  display: grid;
  gap: 16px;
}

.step {
  background: #f9fafb;
  border-radius: 12px;
  padding: 16px;
  border: 1px solid #e5e7eb;
}

.step-number {
  width: 26px;
  height: 26px;
  border-radius: 9999px;
  background: #111827;
  color: #f9fafb;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  margin-bottom: 8px;
}

.step h3 {
  font-size: 16px;
  margin: 0 0 6px;
}

.step p {
  font-size: 14px;
  margin: 0;
}

/* Benefits */

.benefit-grid {
  display: grid;
  gap: 16px;
}

.benefit-card {
  background: #f9fafb;
  border-radius: 12px;
  padding: 16px;
  border: 1px solid #e5e7eb;
  font-size: 14px;
}

/* Pricing */

.pricing-grid {
  display: grid;
  gap: 16px;
}

.price-card {
  background: #f9fafb;
  border-radius: 12px;
  padding: 16px;
  border: 1px solid #e5e7eb;
  font-size: 14px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.price-card-highlight {
  border-color: #111827;
}

.price-card h3 {
  margin: 0;
  font-size: 16px;
}

.price {
  font-size: 20px;
  font-weight: 600;
}

.price-card ul {
  padding-left: 18px;
  margin: 4px 0 8px;
}

.price-card li {
  margin-bottom: 4px;
}

/* WeChat Block */

.wechat-section {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.wechat-text ul {
  padding-left: 18px;
  font-size: 14px;
}

.wechat-qr {
  max-width: 260px;
}

.qr-placeholder {
  border-radius: 24px;
  border: 2px dashed #9ca3af;
  padding: 32px 16px;
  text-align: center;
  background: #f9fafb;
}

.qr-placeholder p {
  margin: 4px 0;
}

.qr-small {
  font-size: 12px;
  color: #6b7280;
}

/* FAQ */

.faq details {
  background: #f9fafb;
  border-radius: 10px;
  padding: 10px 14px;
  margin-bottom: 10px;
  border: 1px solid #e5e7eb;
}

.faq summary {
  cursor: pointer;
  font-size: 14px;
  font-weight: 500;
}

.faq p {
  font-size: 14px;
  margin-top: 8px;
}

/* Footer */

.site-footer {
  border-top: 1px solid #e5e7eb;
  padding: 16px 0 20px;
  font-size: 12px;
  color: #6b7280;
}

.footer-inner {
  text-align: center;
}

.footer-note {
  margin-top: 4px;
}

/* Desktop Layout (ab 768px) */

@media (min-width: 768px) {
  .hero-inner {
    flex-direction: row;
    align-items: stretch;
  }

  .hero-text {
    flex: 1.2;
  }

  .hero-side {
    flex: 1;
  }

  .steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .benefit-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .pricing-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .wechat-section {
    flex-direction: row;
    align-items: center;
  }

  .wechat-text {
    flex: 1.2;
  }

  .wechat-qr {
    flex: 0.8;
  }
}