* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --primary-color: #1e40af;
  --primary-light: #3b82f6;
  --primary-dark: #1e3a8a;
  --secondary-color: #64748b;
  --bg-color: #f8fafc;
  --card-bg: #ffffff;
  --text-primary: #0f172a;
  --text-secondary: #64748b;
  --border-color: #e2e8f0;
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', sans-serif;
  background: var(--bg-color);
  min-height: 100vh;
  color: var(--text-primary);
}

.app-container {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.page-header {
  background: var(--card-bg);
  border-bottom: 1px solid var(--border-color);
  padding: 20px 0;
  margin-bottom: 32px;
}

.header-content {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  gap: 24px;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--primary-color);
  text-decoration: none;
  font-size: 15px;
  font-weight: 500;
  transition: color 0.2s ease;
}

.back-link:hover {
  color: var(--primary-dark);
  text-decoration: underline;
}

.back-icon {
  font-size: 18px;
}

.page-title {
  font-size: 24px;
  font-weight: 700;
  color: var(--text-primary);
}

.main-content {
  flex: 1;
  padding-bottom: 60px;
}

.company-section {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.section-card {
  background: var(--card-bg);
  border-radius: 16px;
  padding: 28px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-color);
}

.section-title {
  font-size: 18px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border-color);
}

.company-desc {
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-secondary);
}

.contact-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 14px 16px;
  background: var(--bg-color);
  border-radius: 10px;
}

.contact-icon {
  font-size: 24px;
  flex-shrink: 0;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.contact-label {
  font-size: 13px;
  color: var(--text-secondary);
}

.contact-value {
  font-size: 15px;
  font-weight: 500;
  color: var(--text-primary);
}

.qr-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}

.qr-wrapper {
  padding: 20px;
  background: white;
  border-radius: 16px;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border-color);
}

.qr-image {
  width: 200px;
  height: 200px;
  border-radius: 12px;
  object-fit: cover;
  background: var(--bg-color);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  font-size: 14px;
  text-align: center;
  line-height: 1.5;
}

.qr-image::before {
  content: attr(alt);
}

.qr-desc {
  font-size: 14px;
  color: var(--text-secondary);
}

.license-container {
  display: flex;
  justify-content: center;
  padding: 16px;
  background: var(--bg-color);
  border-radius: 12px;
}

.license-image {
  max-width: 100%;
  max-height: 400px;
  border-radius: 8px;
  box-shadow: var(--shadow-md);
  background: var(--bg-color);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  font-size: 14px;
  text-align: center;
  min-height: 200px;
}

.license-image::before {
  content: attr(alt);
}

.footer {
  background: var(--card-bg);
  border-top: 1px solid var(--border-color);
  padding: 24px 0;
  margin-top: 48px;
}

.footer-content {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 24px;
  text-align: center;
}

.footer-content p {
  color: var(--text-secondary);
  font-size: 14px;
  margin-bottom: 6px;
}

.footer-beian {
  margin-top: 8px;
}

.footer-beian a {
  color: var(--text-secondary);
  font-size: 13px;
  text-decoration: none;
  transition: color 0.2s ease;
}

.footer-beian a:hover {
  color: var(--primary-color);
  text-decoration: underline;
}

@media (max-width: 768px) {
  .app-container {
    padding: 0 16px;
  }

  .header-content {
    padding: 0 16px;
  }

  .page-title {
    font-size: 20px;
  }

  .section-card {
    padding: 20px;
  }

  .contact-item {
    padding: 12px;
  }

  .qr-image {
    width: 160px;
    height: 160px;
  }
}