@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&family=Noto+Sans+JP:wght@400;500;600;700&display=swap');

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

html {
  scroll-behavior: smooth;
}

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

body[lang='en'] {
  font-family: var(--font-en);
}

img {
  max-width: 100%;
  height: auto;
}

a {
  text-decoration: none;
  color: var(--primary);
  transition: color 0.2s;
}

a:hover {
  color: var(--primary-dark);
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

.section {
  padding: var(--spacing-xxl) 0;
}

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

.section-subtitle {
  text-align: center;
  font-size: 1.125rem;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-xl);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md) var(--spacing-lg);
  border-radius: var(--radius-md);
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  border: none;
  font-family: inherit;
}

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

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

.btn-outline {
  background-color: transparent;
  color: var(--primary);
  border: 2px solid var(--primary);
}

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

.card {
  background-color: var(--card);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-sm);
  transition: box-shadow 0.2s;
}

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

.badge {
  display: inline-flex;
  align-items: center;
  padding: var(--spacing-xs) var(--spacing-md);
  border-radius: var(--radius-full);
  font-size: 0.875rem;
  font-weight: 600;
}

.badge-soon {
  background-color: var(--warning);
  color: white;
}

.icon {
  width: 24px;
  height: 24px;
}

.grid {
  display: grid;
  gap: var(--spacing-lg);
}

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

.grid-3 {
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.flex {
  display: flex;
}

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

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

.flex-wrap {
  flex-wrap: wrap;
}

.gap-sm {
  gap: var(--spacing-sm);
}

.gap-md {
  gap: var(--spacing-md);
}

.gap-lg {
  gap: var(--spacing-lg);
}

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

.text-muted {
  color: var(--text-muted);
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.header {
  background-color: var(--surface);
  box-shadow: var(--shadow-sm);
  position: sticky;
  top: 0;
  z-index: 100;
  padding: var(--spacing-md) 0;
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text);
}

.logo img {
  border-radius: var(--radius-md);
}

.logo a {
  color: var(--text);
}

.lang-switch {
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-md);
  background-color: var(--background);
  color: var(--text);
  font-weight: 500;
  transition: all 0.2s;
}

.lang-switch:hover {
  background-color: var(--primary-light);
  color: var(--primary-dark);
}

.hero {
  background: linear-gradient(
    135deg,
    var(--primary-light) 0%,
    var(--secondary-light) 100%
  );
  padding: var(--spacing-xxl) 0;
}

.hero-icon {
  margin-bottom: var(--spacing-lg);
}

.hero-icon img {
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
}

.hero-title {
  font-size: 3.5rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: var(--spacing-md);
  line-height: 1.2;
}

.hero-title-small {
  font-size: 2rem;
  color: var(--primary-dark);
}

.hero-subtitle {
  font-size: 1.5rem;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-lg);
}

.hero-br {
  display: none;
}

.hero-badges {
  display: flex;
  justify-content: center;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
}

.hero-description {
  max-width: 600px;
  margin: 0 auto;
}

.hero-description p {
  font-size: 1.125rem;
  color: var(--text-secondary);
}

.feature-card {
  text-align: center;
  padding: var(--spacing-xl);
}

.feature-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto var(--spacing-md);
  background: linear-gradient(
    135deg,
    var(--primary-light) 0%,
    var(--secondary-light) 100%
  );
  border-radius: var(--radius-xl);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
}

.feature-icon .icon {
  width: 32px;
  height: 32px;
}

.feature-title {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: var(--spacing-sm);
}

.feature-description {
  color: var(--text-secondary);
  line-height: 1.6;
}

.category-card {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-lg);
}

.category-icon {
  width: 48px;
  height: 48px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.category-icon .icon {
  width: 32px;
  height: 32px;
}

.category-title {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: var(--spacing-xs);
}

.category-description {
  color: var(--text-secondary);
  font-size: 0.875rem;
}

.faq-list {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  border-bottom: 1px solid var(--border);
}

.faq-item:last-child {
  border-bottom: none;
}

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-lg) 0;
  background: none;
  border: none;
  cursor: pointer;
  font-size: 1.125rem;
  font-weight: 500;
  color: var(--text);
  text-align: left;
  transition: color 0.2s;
}

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

.faq-question .icon {
  transition: transform 0.3s ease;
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
}

.faq-answer p {
  padding-bottom: var(--spacing-lg);
  color: var(--text-secondary);
  line-height: 1.6;
}

.faq-more {
  text-align: center;
  margin-top: var(--spacing-lg);
}

.faq-full {
  background-color: var(--surface);
}

.faq-header {
  text-align: center;
  margin-bottom: var(--spacing-xl);
}

.faq-header .btn {
  margin-top: var(--spacing-lg);
}

.contact-card {
  max-width: 600px;
  margin: 0 auto;
  text-align: center;
  padding: var(--spacing-xl);
}

.contact-email {
  margin-top: var(--spacing-lg);
}

.email-link {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--primary);
  word-break: break-all;
}

.footer {
  background-color: var(--surface);
  padding: var(--spacing-xl) 0;
  margin-top: var(--spacing-xxl);
}

.footer-links {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-md);
  flex-wrap: wrap;
}

.footer-links a {
  color: var(--text-secondary);
  transition: color 0.2s;
}

.footer-links a:hover {
  color: var(--primary);
}

.separator {
  color: var(--text-muted);
}

.footer-copyright {
  text-align: center;
  color: var(--text-muted);
  font-size: 0.875rem;
}

@media (max-width: 640px) {
  .container {
    padding: 0 var(--spacing-md);
  }

  .section {
    padding: var(--spacing-xl) 0;
  }

  .section-title {
    font-size: 1.5rem;
  }

  .hero-title {
    font-size: 2.5rem;
  }

  .hero-title-small {
    font-size: 1.5rem;
  }

  .hero-subtitle {
    font-size: 1.25rem;
  }

  .hero-br {
    display: inline;
  }

  .grid-2,
  .grid-3 {
    grid-template-columns: 1fr;
  }

  .btn {
    padding: var(--spacing-sm) var(--spacing-md);
  }

  .feature-card {
    padding: var(--spacing-lg);
  }

  .feature-icon {
    width: 56px;
    height: 56px;
  }

  .category-card {
    flex-direction: column;
    text-align: center;
    padding: var(--spacing-md);
  }

  .faq-question {
    padding: var(--spacing-md) 0;
    font-size: 1rem;
  }

  .contact-card {
    padding: var(--spacing-lg);
  }

  .email-link {
    font-size: 1rem;
  }

  .footer-links {
    flex-direction: column;
    gap: var(--spacing-sm);
  }

  .separator {
    display: none;
  }
}