body {
  margin: 0;
  font-family: 'Segoe UI', Arial, sans-serif;
  background: #f8f9fa;
  color: #222;
}
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 16px;
}
.header {
  background: #fff;
  border-bottom: 1px solid #e5e5e5;
  position: sticky;
  top: 0;
  z-index: 100;
}
.header-flex {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 0;
}
.logo {
  color: #198754;
  font-weight: bold;
  font-size: 2rem;
  letter-spacing: 1px;
}
.nav a {
  margin: 0 12px;
  text-decoration: none;
  color: #222;
  font-weight: 500;
  transition: color 0.2s;
}
.nav a:hover {
  color: #198754;
}
.btn {
  display: inline-block;
  padding: 10px 24px;
  border-radius: 6px;
  font-weight: 600;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: background 0.2s, color 0.2s;
}
.btn-primary {
  background: #198754;
  color: #fff;
}
.btn-primary:hover {
  background: #146c43;
}
/* Xóa các style liên quan đến .btn-secondary, .cta-register */
.btn-secondary, .btn-secondary:hover, .cta-register, .cta-register p, .cta-register h2 {
  display: none !important;
}
.hero {
  background: linear-gradient(90deg, #e9f7ef 0%, #fff 100%);
  padding: 60px 0 40px 0;
  text-align: center;
}
.hero h1 {
  font-size: 2.5rem;
  color: #198754;
  margin-bottom: 12px;
}
.hero p {
  font-size: 1.2rem;
  margin-bottom: 24px;
}
.hero-cta .btn {
  margin: 0 8px 8px 0;
}
.contact-quick {
  background: #fff;
  border-bottom: 1px solid #e5e5e5;
  padding: 16px 0;
}
.contact-flex {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
  justify-content: space-between;
  font-size: 1rem;
}
.products-highlight {
  background: #f1fdf6;
  padding: 40px 0 24px 0;
}
.products-highlight h2 {
  color: #198754;
  text-align: center;
  margin-bottom: 24px;
}
.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 20px;
}
.product-card {
  background: #fff;
  border: 1px solid #e5e5e5;
  border-radius: 8px;
  padding: 24px 12px;
  text-align: center;
  font-weight: 600;
  color: #198754;
  box-shadow: 0 2px 8px rgba(25,135,84,0.04);
  transition: box-shadow 0.2s;
}
.product-card:hover {
  box-shadow: 0 4px 16px rgba(25,135,84,0.10);
}
.about, .services, .products-list, .company-profile, .contact-form, .cta-register {
  padding: 40px 0 24px 0;
}
.about h2, .services h2, .products-list h2, .company-profile h2, .contact-form h2, .cta-register h2 {
  color: #198754;
  margin-bottom: 16px;
  text-align: center;
}
.service-list {
  list-style: none;
  padding: 0;
  text-align: center;
  font-size: 1.1rem;
}
.service-list li {
  margin-bottom: 8px;
}
.products-columns {
  display: flex;
  flex-wrap: wrap;
  gap: 32px;
  justify-content: center;
}
.products-columns ul {
  list-style: disc inside;
  min-width: 180px;
  padding: 0 8px;
}
.products-columns li {
  margin-bottom: 6px;
}
.company-profile ul {
  list-style: none;
  padding: 0;
  max-width: 600px;
  margin: 0 auto;
}
.company-profile li {
  margin-bottom: 8px;
}
.contact-form form {
  display: flex;
  flex-direction: column;
  gap: 12px;
  max-width: 400px;
  margin: 0 auto 16px auto;
}
.contact-form input, .contact-form textarea {
  padding: 10px;
  border: 1px solid #ccc;
  border-radius: 6px;
  font-size: 1rem;
}
.contact-form textarea {
  min-height: 80px;
  resize: vertical;
}
.contact-form button {
  width: fit-content;
  align-self: flex-end;
}
.contact-person {
  text-align: center;
  margin-top: 12px;
}
.footer {
  background: #198754;
  color: #fff;
  padding: 24px 0 12px 0;
  font-size: 1rem;
}
.footer-flex {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}
.footer a {
  color: #fff;
  text-decoration: underline;
  margin: 0 4px;
  transition: color 0.2s;
}
.footer a:hover {
  color: #d1e7dd;
}
@media (max-width: 900px) {
  .products-columns {
    flex-direction: column;
    align-items: center;
  }
  .header-flex {
    flex-direction: column;
    gap: 12px;
  }
  .contact-flex {
    flex-direction: column;
    gap: 8px;
    align-items: flex-start;
  }
}
@media (max-width: 600px) {
  .container {
    padding: 0 6px;
  }
  .hero h1 {
    font-size: 1.5rem;
  }
  .products-grid {
    grid-template-columns: 1fr 1fr;
  }
  .footer-flex {
    font-size: 0.95rem;
  }
}