:root {
  --primary: #0a84ff;
  --primary-hover: #0070e0;
  --secondary: #0260e0;
  --dark: #1d1d1f;
  --gray-100: #f5f5f7;
  --gray-200: #e8e8ed;
  --gray-600: #86868b;
  --gray-800: #3a3a3c;
  --white: #ffffff;
  --radius: 12px;
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
  --shadow-md: 0 8px 24px rgba(0,0,0,0.08);
  --shadow-lg: 0 16px 32px rgba(0,0,0,0.1);
  --transition: 0.25s ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  color: var(--dark);
  background: var(--gray-100);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  line-height: 1.6;
}

img {
  display: block;
  max-width: 100%;
  height: auto;
}
section {
  overflow: hidden;
}

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

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.btn {
  display: inline-block;
  font-weight: 600;
  font-family: 'Inter', sans-serif;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
  text-align: center;
  padding: 12px 24px;
  font-size: 1rem;
  background: transparent;
  color: var(--dark);
}

.btn-primary {
  background: var(--primary);
  color: var(--white);
  box-shadow: 0 4px 12px rgba(10,132,255,0.25);
}

.btn-primary:hover {
  background: var(--primary-hover);
  box-shadow: 0 6px 20px rgba(10,132,255,0.35);
  transform: translateY(-1px);
}

.btn-full {
  width: 100%;
}

.btn-large {
  padding: 16px 32px;
  font-size: 1.1rem;
  letter-spacing: 0.5px;
}

.header {
  background: rgba(255,255,255,0.72);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid rgba(0,0,0,0.06);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.logo a {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.5rem;
  color: var(--dark);
  letter-spacing: -0.3px;
}

.logo img {
  width: 50px;
  height: 50px;
  object-fit: contain;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 20px;
}

.header-notice {
  font-size: 0.8rem;
  color: var(--gray-600);
  max-width: 220px;
  text-align: right;
  line-height: 1.3;
}

.btn-order-header {
  padding: 10px 20px;
  white-space: nowrap;
}

.hero {
  background: linear-gradient(135deg, #e9f0fa 0%, #dbeafe 100%);
  padding: 80px 0;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.hero-content h1 {
  font-size: clamp(2.2rem, 5vw, 3.2rem);
  font-weight: 700;
  line-height: 1.15;
  color: var(--dark);
  margin-bottom: 20px;
  letter-spacing: -0.5px;
}

.hero-content p {
  font-size: 1.15rem;
  color: var(--gray-800);
  margin-bottom: 32px;
  max-width: 460px;
}

.hero-image img {
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  width: 100%;
  height: 100%;
  object-fit: cover;
  aspect-ratio: 4/3;
}

.products {
  padding: 80px 0;
  background: var(--white);
}

.products h2 {
  text-align: center;
  font-size: clamp(2rem, 4vw, 2.6rem);
  font-weight: 700;
  margin-bottom: 48px;
  letter-spacing: -0.3px;
}

.products-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.product-card {
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: box-shadow var(--transition), transform var(--transition);
  display: flex;
  flex-direction: column;
}

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

.product-img {
  height: 220px;
  overflow: hidden;
}

.product-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: var(--radius) var(--radius) 0 0;
}

.product-body {
  padding: 24px;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.product-body h3 {
  font-size: 1.4rem;
  font-weight: 600;
  margin-bottom: 10px;
}

.product-body p {
  color: var(--gray-800);
  margin-bottom: 16px;
  flex: 1;
}

.product-meta {
  font-size: 0.9rem;
  color: var(--gray-600);
  margin-bottom: 12px;
}

.product-price {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 20px;
}

.benefits {
  padding: 80px 0;
  background: var(--gray-100);
}

.benefits h2 {
  text-align: center;
  font-size: clamp(2rem, 4vw, 2.6rem);
  font-weight: 700;
  margin-bottom: 48px;
  letter-spacing: -0.3px;
}

.benefits-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
}

.benefit-item {
  background: var(--white);
  border-radius: var(--radius);
  padding: 32px 24px;
  text-align: center;
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition);
}

.benefit-item:hover {
  box-shadow: var(--shadow-md);
}

.benefit-item i {
  font-size: 2.4rem;
  color: var(--primary);
  margin-bottom: 16px;
}

.benefit-item h3 {
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.benefit-item p {
  color: var(--gray-800);
  font-size: 0.95rem;
}

.installation {
  padding: 80px 0;
  background: var(--white);
}

.installation-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.installation-image img {
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
  width: 100%;
  height: auto;
  object-fit: cover;
}

.installation-steps h2 {
  font-size: clamp(2rem, 4vw, 2.6rem);
  font-weight: 700;
  margin-bottom: 36px;
  letter-spacing: -0.3px;
}

.step {
  display: flex;
  gap: 20px;
  margin-bottom: 28px;
}

.step-number {
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  background: var(--primary);
  color: var(--white);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.2rem;
}

.step h3 {
  font-weight: 600;
  font-size: 1.2rem;
  margin-bottom: 4px;
}

.step p {
  color: var(--gray-800);
}

.testimonials {
  padding: 80px 0;
  background: var(--gray-100);
}

.testimonials h2 {
  text-align: center;
  font-size: clamp(2rem, 4vw, 2.6rem);
  font-weight: 700;
  margin-bottom: 48px;
  letter-spacing: -0.3px;
}

.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.testimonial-card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 32px;
  box-shadow: var(--shadow-sm);
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 16px;
}

.testimonial-author img {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--primary);
}

.testimonial-author strong {
  display: block;
  font-weight: 600;
}

.testimonial-author span {
  font-size: 0.85rem;
  color: var(--gray-600);
}

.stars {
  color: #f5a623;
  font-size: 1.2rem;
  margin-bottom: 12px;
}

.testimonial-card p {
  color: var(--gray-800);
  font-style: italic;
  line-height: 1.5;
}

.order {
  padding: 80px 0;
  background: var(--white);
  text-align: center;
}

.order h2 {
  font-size: clamp(2rem, 4vw, 2.6rem);
  font-weight: 700;
  margin-bottom: 12px;
  letter-spacing: -0.3px;
}

.order p {
  color: var(--gray-800);
  margin-bottom: 40px;
  font-size: 1.1rem;
}

.order-form {
  max-width: 620px;
  margin: 0 auto;
  background: var(--gray-100);
  padding: 40px;
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  text-align: left;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-bottom: 20px;
}

.form-row input,
.form-row select {
  width: 100%;
  padding: 14px 16px;
  border: 1px solid var(--gray-200);
  border-radius: 8px;
  font-family: 'Inter', sans-serif;
  font-size: 1rem;
  background: var(--white);
  transition: border-color var(--transition);
}

.form-row input:focus,
.form-row select:focus {
  border-color: var(--primary);
  outline: none;
  box-shadow: 0 0 0 3px rgba(10,132,255,0.15);
}

.agree-label {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.9rem;
  color: var(--gray-800);
  margin: 24px 0;
  cursor: pointer;
}

.agree-label input {
  margin-top: 2px;
  width: 16px;
  height: 16px;
  accent-color: var(--primary);
}

.order-form .btn {
  width: 100%;
}

.footer {
  background: var(--dark);
  color: #c4c4c6;
  padding: 48px 0 32px;
  margin-top: auto;
  font-size: 0.9rem;
}

.footer-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 40px;
  align-items: flex-start;
}

.footer-brand .logo {
  margin-bottom: 20px;
}

.footer-brand .logo span {
  color: var(--white);
  font-size: 1.5rem;
}

.company-info p {
  margin-bottom: 6px;
  color: #a8a8aa;
}

.footer-disclaimer {
  flex: 1;
  min-width: 260px;
}

.footer-disclaimer p {
  color: #8e8e93;
  line-height: 1.6;
  font-size: 0.85rem;
}

.footer-bottom {
  width: 100%;
  border-top: 1px solid rgba(255,255,255,0.08);
  padding-top: 24px;
  text-align: center;
  color: #8e8e93;
  font-size: 0.85rem;
}

.back-to-top {
  position: fixed;
  bottom: 24px;
  right: 24px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--primary);
  color: var(--white);
  border: none;
  font-size: 1.2rem;
  cursor: pointer;
  box-shadow: var(--shadow-md);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 90;
  transition: opacity var(--transition), transform var(--transition);
}

.back-to-top.visible {
  display: flex;
}

.back-to-top:hover {
  background: var(--primary-hover);
  transform: scale(1.05);
}

@media (max-width: 768px) {
  .hero-grid,
  .installation-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .hero {
    padding: 48px 0;
  }

  .products-grid {
    grid-template-columns: 1fr 1fr;
  }

  .benefits-grid {
    grid-template-columns: 1fr 1fr;
  }

  .testimonials-grid {
    grid-template-columns: 1fr;
  }

  .header-inner {
    flex-wrap: wrap;
    height: auto;
    padding: 12px 24px;
  }

  .header-actions {
    flex-basis: 100%;
    justify-content: space-between;
    margin-top: 8px;
  }

  .header-notice {
    text-align: left;
    max-width: 180px;
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    flex-direction: column;
  }
}

@media (max-width: 480px) {
  .products-grid {
    grid-template-columns: 1fr;
  }

  .benefits-grid {
    grid-template-columns: 1fr;
  }

  .container {
    padding: 0 16px;
  }

  .footer {
    font-size: 0.85rem;
  }
}

/* ----- Footer Legal Block ----- */
.footer-legal h3 {
  color: #fff;
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 16px;
}

.footer-legal a {
  display: block;
  color: #c4c4c6;
  text-decoration: none;
  margin-bottom: 10px;
  font-size: 0.9rem;
  transition: color 0.25s ease;
}

.footer-legal a:hover {
  color: #fff;
}

.legal-content, .thanks-main {
  max-width: 800px;
  margin: 0 auto;
  padding: 40px 20px;
}
.thanks-main {
  padding: 150px 0;
  text-align: center;
}
.thanks-main img {
  margin: 0 auto;
}

.legal-content h1 {
  font-size: 2rem;
  margin-bottom: 1rem;
  color: var(--dark);
  letter-spacing: -0.3px;
}

.legal-content h2 {
  font-size: 1.8rem;
  margin: 2.5rem 0 1rem;
  color: var(--dark);
  letter-spacing: -0.2px;
}

.legal-content h3 {
  font-size: 1.4rem;
  margin: 1.8rem 0 0.75rem;
  color: var(--dark);
}

.legal-content p {
  font-size: 1rem;
  line-height: 1.6;
  color: #333;
  margin-bottom: 1rem;
}

.legal-content ul,
.legal-content ol {
  margin: 1rem 0;
  padding-left: 1.5rem;
}

.legal-content li {
  margin-bottom: 0.5rem;
  color: #333;
}

.legal-content a {
  color: var(--primary);
  text-decoration: underline;
}

.legal-content .contact-details {
  background: #f9f9fb;
  border-radius: 8px;
  padding: 1.5rem;
  margin: 2rem 0;
}

.legal-content .contact-details p {
  margin-bottom: 0.5rem;
}