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

:root {
  --color-primary: #1e40af;
  --color-primary-dark: #1e3a8a;
  --color-primary-light: #3b82f6;
  --color-secondary: #f1f5f9;
  --color-text: #1e293b;
  --color-text-light: #64748b;
  --color-white: #ffffff;
  --color-border: #e2e8f0;
  --color-success: #10b981;
  --color-error: #ef4444;
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --radius: 8px;
  --radius-lg: 12px;
  --transition: 0.2s ease;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-white);
}

.container {
  width: 100%;
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 20px;
}

.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: var(--color-white);
  box-shadow: var(--shadow);
  z-index: 1000;
}

.header-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-primary);
  text-decoration: none;
}

.nav-list {
  display: flex;
  list-style: none;
  gap: 32px;
}

.nav-list a {
  color: var(--color-text);
  text-decoration: none;
  font-weight: 500;
  transition: color var(--transition);
}

.nav-list a:hover {
  color: var(--color-primary);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 5px;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text);
  transition: var(--transition);
}

.hero {
  padding: 140px 0 80px;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  color: var(--color-white);
  text-align: center;
}

.hero h1 {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 20px;
  line-height: 1.2;
}

.hero-subtitle {
  font-size: 1.125rem;
  max-width: 700px;
  margin: 0 auto 32px;
  opacity: 0.95;
}

.btn {
  display: inline-block;
  padding: 14px 32px;
  font-size: 1rem;
  font-weight: 600;
  text-decoration: none;
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  transition: all var(--transition);
}

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

.btn-primary:hover {
  background: var(--color-secondary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.section {
  padding: 80px 0;
}

.section-alt {
  background: var(--color-secondary);
}

.section-title {
  font-size: 2rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 48px;
  color: var(--color-text);
}

.about-content {
  max-width: 800px;
  margin: 0 auto;
}

.about-content p {
  margin-bottom: 16px;
  color: var(--color-text-light);
}

.about-content p:last-child {
  margin-bottom: 0;
}

.feature-list {
  list-style: none;
  max-width: 800px;
  margin: 0 auto;
  display: grid;
  gap: 24px;
}

.feature-list li {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 20px;
  background: var(--color-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
}

.feature-icon {
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-primary);
  color: var(--color-white);
  border-radius: var(--radius);
}

.feature-list li span:last-child {
  padding-top: 12px;
  font-size: 1rem;
  color: var(--color-text);
}

.requirements-list {
  max-width: 600px;
  margin: 0 auto;
  padding-left: 24px;
}

.requirements-list li {
  margin-bottom: 16px;
  color: var(--color-text-light);
  position: relative;
}

.requirements-list li::marker {
  color: var(--color-primary);
}

.offer-list {
  list-style: none;
  max-width: 800px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.offer-list li {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 24px;
  background: var(--color-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
}

.offer-icon {
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-primary-light);
  color: var(--color-white);
  border-radius: var(--radius);
}

.offer-list li strong {
  display: block;
  margin-bottom: 4px;
  color: var(--color-text);
}

.offer-list li p {
  font-size: 0.875rem;
  color: var(--color-text-light);
  margin: 0;
}

.faq-list {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.faq-item {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
}

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 24px;
  background: none;
  border: none;
  font-size: 1rem;
  font-weight: 600;
  text-align: left;
  color: var(--color-text);
  cursor: pointer;
  transition: background var(--transition);
}

.faq-question:hover {
  background: var(--color-secondary);
}

.faq-question svg {
  flex-shrink: 0;
  transition: transform var(--transition);
}

.faq-item.active .faq-question svg {
  transform: rotate(180deg);
}

.faq-answer {
  display: none;
  padding: 0 24px 20px;
}

.faq-item.active .faq-answer {
  display: block;
}

.faq-answer p {
  color: var(--color-text-light);
  margin: 0;
}

.form {
  max-width: 600px;
  margin: 0 auto;
  background: var(--color-white);
  padding: 40px;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
}

.form-group {
  margin-bottom: 24px;
}

.form-group label {
  display: block;
  margin-bottom: 8px;
  font-weight: 500;
  color: var(--color-text);
}

.required {
  color: var(--color-error);
}

.form-group input[type="text"],
.form-group input[type="email"],
.form-group input[type="tel"],
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  font-size: 1rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  transition: border-color var(--transition), box-shadow var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(30, 64, 175, 0.1);
}

.form-group textarea {
  resize: vertical;
  min-height: 100px;
}

.form-checkbox {
  display: flex;
  align-items: flex-start;
  gap: 12px;
}

.form-checkbox input[type="checkbox"] {
  margin-top: 4px;
  width: 18px;
  height: 18px;
  cursor: pointer;
}

.form-checkbox label {
  margin-bottom: 0;
  font-size: 0.875rem;
  color: var(--color-text-light);
  cursor: pointer;
}

.form-checkbox a {
  color: var(--color-primary);
}

.btn-submit {
  width: 100%;
  background: var(--color-primary);
  color: var(--color-white);
  padding: 16px 32px;
  font-size: 1.0625rem;
}

.btn-submit:hover {
  background: var(--color-primary-dark);
}

.footer {
  background: var(--color-text);
  color: var(--color-white);
  padding: 40px 0;
}

.footer-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 24px;
}

.footer-logo {
  font-size: 1.25rem;
  font-weight: 700;
}

.footer-info p {
  margin-top: 8px;
  font-size: 0.875rem;
  opacity: 0.8;
}

.footer-links {
  display: flex;
  gap: 24px;
}

.footer-links a {
  color: var(--color-white);
  text-decoration: none;
  font-size: 0.875rem;
  opacity: 0.8;
  transition: opacity var(--transition);
}

.footer-links a:hover {
  opacity: 1;
}

@media (max-width: 768px) {
  .nav-toggle {
    display: flex;
  }

  .nav-list {
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    flex-direction: column;
    background: var(--color-white);
    padding: 24px;
    gap: 16px;
    box-shadow: var(--shadow-md);
    display: none;
  }

  .nav-list.active {
    display: flex;
  }

  .hero {
    padding: 120px 0 60px;
  }

  .hero h1 {
    font-size: 1.875rem;
  }

  .hero-subtitle {
    font-size: 1rem;
  }

  .section {
    padding: 60px 0;
  }

  .section-title {
    font-size: 1.5rem;
    margin-bottom: 32px;
  }

  .offer-list {
    grid-template-columns: 1fr;
  }

  .form {
    padding: 24px;
  }

  .footer-content {
    flex-direction: column;
    text-align: center;
  }
}