:root {
  --primary: #1e3a8a;
  --primary-light: #3b82f6;
  --secondary: #10b981;
  --accent: #f59e0b;
  --dark: #1f2937;
  --light: #f3f4f6;
  --white: #ffffff;
}
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}
body {
  background: linear-gradient(135deg, #e0f2fe 0%, #f1f5f9 100%);
  background-attachment: fixed;
  color: var(--dark);
  line-height: 1.6;
}
.container {
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 20px;
}
header {
  background: var(--white);
  box-shadow: 0 2px 10px rgba(0,0,0,0.1);
  position: sticky;
  top: 0;
  z-index: 100;
}
.nav-wrapper {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 15px 0;
}
.logo-group {
  display: flex;
  align-items: center;
  text-decoration: none;
  color: var(--dark);
}
.logo-badge {
  background: var(--primary);
  color: var(--white);
  font-size: 24px;
  font-weight: bold;
  width: 40px;
  height: 40px;
  border-radius: 8px;
  display: flex;
  justify-content: center;
  align-items: center;
  margin-right: 10px;
}
.brand-name {
  font-size: 20px;
  font-weight: 800;
  display: block;
}
.brand-sub {
  font-size: 12px;
  color: #6b7280;
}
.nav-menu {
  display: flex;
  list-style: none;
  gap: 20px;
}
.nav-link {
  text-decoration: none;
  color: var(--dark);
  font-weight: 600;
  transition: color 0.3s;
}
.nav-link:hover, .nav-link.active {
  color: var(--primary);
}
.header-cta-btn {
  background: var(--secondary);
  color: var(--white);
  padding: 10px 20px;
  border-radius: 20px;
  text-decoration: none;
  font-weight: bold;
}
.hero-section {
  padding: 40px 0;
}
.main-card {
  background: var(--white);
  border-radius: 12px;
  padding: 40px;
  box-shadow: 0 4px 20px rgba(0,0,0,0.05);
}
.hero-tag-box {
  background: #e0f2fe;
  color: var(--primary);
  display: inline-block;
  padding: 5px 15px;
  border-radius: 20px;
  font-weight: bold;
  margin-bottom: 20px;
}
.hero-title {
  font-size: 32px;
  margin-bottom: 20px;
}
.hero-title span {
  color: var(--primary);
}
.top-photos-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin: 30px 0;
}
.top-photo-card img {
  width: 100%;
  border-radius: 10px;
  object-fit: cover;
  height: 250px;
}
.top-photo-caption {
  text-align: center;
  margin-top: 10px;
  font-weight: 600;
  color: #4b5563;
}
.content-text p {
  margin-bottom: 15px;
  font-size: 18px;
}
.effects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 20px;
  margin: 40px 0;
}
.effect-card {
  background: #f8fafc;
  padding: 20px;
  border-radius: 10px;
  text-align: center;
  border: 1px solid #e2e8f0;
}
.effect-icon {
  font-size: 40px;
  margin-bottom: 15px;
}
.effect-card h3 {
  margin-bottom: 10px;
  color: var(--primary);
}
.order-section {
  background: #eef2ff;
  padding: 40px;
  border-radius: 12px;
  margin-top: 40px;
  display: flex;
  gap: 40px;
  align-items: center;
}
.product-image {
  flex: 1;
  text-align: center;
}
.product-image img {
  max-width: 100%;
  border-radius: 10px;
  box-shadow: 0 10px 25px rgba(0,0,0,0.1);
}
.order-form {
  flex: 1;
  background: var(--white);
  padding: 30px;
  border-radius: 10px;
  box-shadow: 0 5px 15px rgba(0,0,0,0.05);
}
.order-form h2 {
  margin-bottom: 20px;
  color: var(--primary);
}
.form-group {
  margin-bottom: 15px;
}
.form-group label {
  display: block;
  margin-bottom: 5px;
  font-weight: bold;
}
.form-group input {
  width: 100%;
  padding: 12px;
  border: 1px solid #ccc;
  border-radius: 5px;
  font-size: 16px;
}
.btn-submit {
  width: 100%;
  background: var(--accent);
  color: var(--white);
  padding: 15px;
  border: none;
  border-radius: 5px;
  font-size: 18px;
  font-weight: bold;
  cursor: pointer;
  text-transform: uppercase;
  transition: background 0.3s;
}
.btn-submit:hover {
  background: #d97706;
}
footer {
  background: var(--dark);
  color: var(--white);
  text-align: center;
  padding: 20px 0;
  margin-top: 50px;
}
.interactive-box {
  background: #fff;
  padding: 30px;
  border-radius: 10px;
  box-shadow: 0 4px 15px rgba(0,0,0,0.1);
  margin-bottom: 30px;
}
.question {
  font-size: 20px;
  font-weight: bold;
  margin-bottom: 15px;
}
.options {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.option-btn {
  padding: 10px 20px;
  background: var(--light);
  border: 2px solid var(--primary-light);
  border-radius: 8px;
  cursor: pointer;
  font-size: 16px;
  transition: all 0.3s;
  text-align: left;
}
.option-btn:hover {
  background: var(--primary-light);
  color: var(--white);
}
.certificate-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 20px;
  margin-top: 30px;
}
.cert-card {
  background: var(--white);
  padding: 20px;
  border-radius: 10px;
  text-align: center;
  box-shadow: 0 4px 15px rgba(0,0,0,0.05);
}
.cert-card img {
  width: 100%;
  height: auto;
  border-radius: 5px;
  margin-bottom: 15px;
}

.footer-extended {
  background: #f8fafc;
  color: var(--dark);
  padding: 50px 20px 20px;
  border-top: 1px solid #e2e8f0;
  margin-top: 50px;
}
.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 40px;
  max-width: 1000px;
  margin: 0 auto;
}
.footer-col h4 {
  font-size: 18px;
  color: var(--primary);
  margin-bottom: 20px;
  position: relative;
  padding-bottom: 10px;
}
.footer-col h4::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 50px;
  height: 2px;
  background: var(--secondary);
}
.footer-col p {
  font-size: 14px;
  color: #4b5563;
  margin-bottom: 10px;
  line-height: 1.6;
}
.footer-col p strong {
  color: var(--dark);
}
.footer-links {
  list-style: none;
}
.footer-links li {
  margin-bottom: 10px;
}
.footer-links a {
  color: #4b5563;
  text-decoration: none;
  font-size: 14px;
  transition: color 0.3s;
}
.footer-links a:hover {
  color: var(--primary);
  text-decoration: underline;
}
.footer-bottom-line {
  text-align: center;
  margin-top: 40px;
  padding-top: 20px;
  border-top: 1px solid #e2e8f0;
  font-size: 13px;
  color: #9ca3af;
}