:root {
  --primary-color: #4F46E5; /* Indigo */
  --secondary-color: #FF6B6B; /* Coral */
  --accent-color: #10B981;
  --text-primary: #1F2937;
  --text-secondary: #6B7280;
  --background: #FFFFFF;
  --surface: #F9FAFB;
  --border: #E5E7EB;
  --border-light: #F3F4F6;
  
  --font-family: 'Noto Sans JP', -apple-system, BlinkMacSystemFont, sans-serif;
  --border-radius: 12px;
  --shadow: 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);
}

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

body {
  font-family: var(--font-family);
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--background);
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Header */
.header {
  background: var(--background);
  border-bottom: 1px solid var(--border);
  padding: 1rem 0;
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo-brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo {
  width: 40px;
  height: 40px;
}

.brand-name {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--text-primary);
}

/* Hero Section */
.hero {
  padding: 4rem 0;
  background: linear-gradient(135deg, var(--surface) 0%, var(--background) 100%);
}

.hero .container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
}

.hero-content {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.hero-title {
  font-size: 3rem;
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 1.5rem;
  color: var(--text-primary);
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--text-secondary);
  margin-bottom: 2rem;
  line-height: 1.5;
}

.hero-cta {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.btn-primary {
  background: var(--primary-color);
  color: white;
  border: none;
  padding: 14px 28px;
  border-radius: var(--border-radius);
  font-size: 1rem;
  font-weight: 500;
  cursor: pointer;
  font-family: var(--font-family);
  transition: background 0.2s ease;
}

.btn-primary:hover {
  background: #4338CA;
}

.btn-secondary {
  background: transparent;
  color: var(--primary-color);
  border: 2px solid var(--primary-color);
  padding: 12px 28px;
  border-radius: var(--border-radius);
  font-size: 1rem;
  font-weight: 500;
  cursor: pointer;
  font-family: var(--font-family);
  transition: all 0.2s ease;
}

.btn-secondary:hover {
  background: var(--primary-color);
  color: white;
}

.hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero-image {
  width: 100%;
  height: 320px;
  object-fit: cover;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow);
}

/* Section Title */
.section-title {
  font-size: 2.5rem;
  font-weight: 600;
  text-align: center;
  margin-bottom: 3rem;
  color: var(--text-primary);
}

/* Features */
.features {
  padding: 5rem 0;
  background: var(--background);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
}

.feature-item {
  text-align: center;
  padding: 2rem;
  background: var(--surface);
  border-radius: var(--border-radius);
  border: 1px solid var(--border-light);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.feature-item:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.feature-icon {
  width: 60px;
  height: 60px;
  margin: 0 auto 1.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(79, 70, 229, 0.1);
  border-radius: 50%;
}

.feature-icon svg {
  width: 30px;
  height: 30px;
}

.feature-item h3 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.feature-item p {
  color: var(--text-secondary);
  line-height: 1.5;
}

/* How It Works */
.how-it-works {
  padding: 5rem 0;
  background: var(--surface);
}

.steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

.step {
  text-align: center;
  padding: 2rem;
}

.step-number {
  width: 60px;
  height: 60px;
  background: var(--primary-color);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  font-weight: 600;
  margin: 0 auto 1.5rem;
}

.step h3 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.step p {
  color: var(--text-secondary);
}

/* Products */
.products {
  padding: 5rem 0;
  background: var(--background);
}

.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2rem;
}

.product-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--border-radius);
  padding: 2rem;
  text-align: center;
  position: relative;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.product-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.product-item.featured {
  border: 2px solid var(--primary-color);
  box-shadow: var(--shadow-lg);
}

.product-item.featured::before {
  content: "人気";
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--primary-color);
  color: white;
  padding: 4px 16px;
  border-radius: 20px;
  font-size: 0.875rem;
  font-weight: 500;
}

.product-item h3 {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.product-price {
  font-size: 2rem;
  font-weight: 700;
  color: var(--primary-color);
  margin-bottom: 1.5rem;
}

.product-features {
  list-style: none;
  margin-bottom: 2rem;
}

.product-features li {
  padding: 0.5rem 0;
  color: var(--text-secondary);
}

.product-features li::before {
  content: "✓";
  color: var(--accent-color);
  font-weight: bold;
  margin-right: 0.5rem;
}

.product-btn {
  background: var(--secondary-color);
  color: white;
  border: none;
  padding: 12px 24px;
  border-radius: var(--border-radius);
  font-size: 1rem;
  font-weight: 500;
  cursor: pointer;
  width: 100%;
  font-family: var(--font-family);
  transition: background 0.2s ease;
}

.product-btn:hover {
  background: #FF5252;
}

/* Why Choose */
.why-choose {
  padding: 5rem 0;
  background: var(--surface);
}

.reasons-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
}

.reason {
  padding: 1.5rem;
  text-align: center;
}

.reason h3 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.reason p {
  color: var(--text-secondary);
  line-height: 1.5;
}

/* Testimonials */
.testimonials {
  padding: 5rem 0;
  background: var(--background);
}

.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

.testimonial-image {
  width: 100%;
  height: 250px;
  object-fit: cover;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow);
}

/* Statistics */
.stats {
  padding: 4rem 0;
  background: var(--primary-color);
  color: white;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 2rem;
}

.stat-item {
  text-align: center;
}

.stat-number {
  font-size: 3rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.stat-label {
  font-size: 1rem;
  opacity: 0.9;
}

/* Newsletter */
.newsletter {
  padding: 4rem 0;
  background: var(--surface);
  text-align: center;
}

.newsletter-desc {
  color: var(--text-secondary);
  margin-bottom: 2rem;
  font-size: 1.125rem;
}

.newsletter-form {
  display: flex;
  max-width: 400px;
  margin: 0 auto;
  gap: 1rem;
}

.newsletter-input {
  flex: 1;
  padding: 12px 16px;
  border: 1px solid var(--border);
  border-radius: var(--border-radius);
  font-size: 1rem;
  font-family: var(--font-family);
}

/* Contact */
.contact {
  padding: 5rem 0;
  background: var(--background);
}

.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

.contact-item {
  text-align: center;
  padding: 2rem;
  background: var(--surface);
  border-radius: var(--border-radius);
  border: 1px solid var(--border-light);
}

.contact-icon {
  width: 60px;
  height: 60px;
  margin: 0 auto 1.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(79, 70, 229, 0.1);
  border-radius: 50%;
}

.contact-icon svg {
  width: 30px;
  height: 30px;
}

.contact-item h3 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.contact-item p {
  color: var(--text-secondary);
  line-height: 1.5;
}

/* Footer */
.footer {
  background: var(--text-primary);
  color: white;
  padding: 3rem 0 1rem;
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: start;
  gap: 3rem;
  margin-bottom: 2rem;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.footer-brand .brand-name {
  color: white;
}

.footer-links {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 2rem;
  flex: 1;
  max-width: 600px;
}

.footer-section h4 {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 1rem;
}

.footer-section ul {
  list-style: none;
}

.footer-section li {
  margin-bottom: 0.5rem;
}

.footer-section a {
  color: rgba(255, 255, 255, 0.8);
  text-decoration: none;
  transition: color 0.2s ease;
}

.footer-section a:hover {
  color: white;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.2);
  padding-top: 1rem;
  text-align: center;
}

.footer-bottom p {
  color: rgba(255, 255, 255, 0.6);
  font-size: 0.875rem;
}

/* Centered sections */
.centered-section {
  text-align: center;
}

.centered-section .container {
  text-align: center;
}

/* Responsive Design */
@media (max-width: 768px) {
  .hero .container {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 2rem;
  }
  
  .hero-title {
    font-size: 2rem;
  }
  
  .hero-cta {
    justify-content: center;
  }
  
  .section-title {
    font-size: 2rem;
  }
  
  .newsletter-form {
    flex-direction: column;
  }
  
  .footer-content {
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 2rem;
  }
  
  .footer-links {
    justify-items: center;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 16px;
  }
  
  .hero-title {
    font-size: 1.75rem;
  }
  
  .hero-cta {
    flex-direction: column;
    align-items: center;
  }
  
  .btn-primary,
  .btn-secondary {
    width: 100%;
    max-width: 280px;
  }
  
  .section-title {
    font-size: 1.75rem;
  }
  
  .features-grid,
  .products-grid,
  .contact-grid {
    grid-template-columns: 1fr;
  }
  
  .footer-links {
    grid-template-columns: 1fr;
    text-align: center;
  }
}