:root {
  --color-primary: #1976D2;
  --color-primary-light: #BBDEFB;
  --color-primary-dark: #0D47A1;
  --color-secondary: #26A69A;
  --color-secondary-light: #B2DFDB;
  --color-secondary-dark: #00695C;
  --color-tertiary: #9C27B0;
  --color-surface: #FFFFFF;
  --color-background: #FAFAFA;
  --color-on-background: #212121;
  --color-on-surface: #212121;
  --color-on-surface-variant: #616161;
  --color-outline: #BDBDBD;
  --color-outline-variant: #E0E0E0;
  --color-error: #D32F2F;
  --color-inverse-surface: #212121;
  --color-inverse-on-surface: #FAFAFA;

  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Noto Sans JP", "Hiragino Sans", "Hiragino Kaku Gothic ProN", sans-serif;
  --font-mono: "SF Mono", "Fira Code", "Fira Mono", "Roboto Mono", monospace;

  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 12px;
  --spacing-lg: 16px;
  --spacing-xl: 20px;
  --spacing-xxl: 24px;
  --spacing-xxxl: 32px;
  --spacing-huge: 40px;
  --spacing-massive: 64px;

  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-full: 9999px;

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.06), 0 1px 3px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07), 0 2px 4px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1), 0 4px 6px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.1), 0 8px 10px rgba(0, 0, 0, 0.04);

  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);

  --max-width: 1120px;
  --header-height: 64px;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-family);
  color: var(--color-on-background);
  background-color: var(--color-background);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

img, svg {
  display: block;
  max-width: 100%;
}

ul, ol {
  list-style: none;
}

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

.skip-link {
  position: absolute;
  top: -100%;
  left: var(--spacing-lg);
  padding: var(--spacing-sm) var(--spacing-lg);
  background: var(--color-primary);
  color: var(--color-surface);
  border-radius: var(--radius-md);
  z-index: 1000;
  font-weight: 500;
}

.skip-link:focus {
  top: var(--spacing-lg);
}

header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-outline-variant);
  height: var(--header-height);
}

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.header-brand {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.header-brand svg {
  width: 32px;
  height: 32px;
  flex-shrink: 0;
}

.header-brand-name {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-on-surface);
  letter-spacing: -0.01em;
}

.header-nav {
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
}

.header-nav a {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-on-surface-variant);
  transition: color var(--transition-fast);
}

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

.lang-switch {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-xs) var(--spacing-sm);
  border: 1px solid var(--color-outline);
  border-radius: var(--radius-md);
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--color-on-surface-variant);
  background: var(--color-surface);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.lang-switch:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.lang-switch svg {
  width: 16px;
  height: 16px;
}

.hero {
  position: relative;
  padding: var(--spacing-massive) 0;
  background: linear-gradient(135deg, #1565C0 0%, #1976D2 40%, #1E88E5 70%, #42A5F5 100%);
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  top: -50%;
  right: -20%;
  width: 600px;
  height: 600px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.04);
  pointer-events: none;
}

.hero::after {
  content: "";
  position: absolute;
  bottom: -30%;
  left: -10%;
  width: 400px;
  height: 400px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.03);
  pointer-events: none;
}

.hero .container {
  position: relative;
  z-index: 1;
}

.hero-content {
  display: flex;
  align-items: center;
  gap: var(--spacing-xxxl);
}

.hero-icon {
  flex-shrink: 0;
  width: 120px;
  height: 120px;
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-xl);
}

.hero-icon img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-text {
  flex: 1;
}

.hero-title {
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  font-weight: 800;
  color: #FFFFFF;
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin-bottom: var(--spacing-md);
}

.hero-subtitle {
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: rgba(255, 255, 255, 0.85);
  line-height: 1.6;
  margin-bottom: var(--spacing-xxl);
  max-width: 540px;
}

.hero-actions {
  display: flex;
  gap: var(--spacing-md);
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md) var(--spacing-xl);
  border-radius: var(--radius-md);
  font-size: 0.9375rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all var(--transition-normal);
  text-decoration: none;
  white-space: nowrap;
}

.btn svg {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}

.btn-primary {
  background: #FFFFFF;
  color: var(--color-primary);
  box-shadow: var(--shadow-md);
}

.btn-primary:hover {
  background: var(--color-primary-light);
  color: var(--color-primary-dark);
  box-shadow: var(--shadow-lg);
  transform: translateY(-1px);
}

.btn-outline {
  background: transparent;
  color: #FFFFFF;
  border: 1.5px solid rgba(255, 255, 255, 0.4);
}

.btn-outline:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.7);
  color: #FFFFFF;
}

.btn-secondary {
  background: var(--color-primary);
  color: #FFFFFF;
}

.btn-secondary:hover {
  background: var(--color-primary-dark);
  color: #FFFFFF;
  box-shadow: var(--shadow-lg);
  transform: translateY(-1px);
}

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

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

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

.section-label {
  display: inline-block;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: var(--spacing-sm);
}

.section-title {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 700;
  color: var(--color-on-surface);
  letter-spacing: -0.02em;
  line-height: 1.3;
}

.section-desc {
  margin-top: var(--spacing-md);
  font-size: 1rem;
  color: var(--color-on-surface-variant);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.7;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--spacing-xxl);
}

.feature-card {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xxl);
  border: 1px solid var(--color-outline-variant);
  transition: all var(--transition-normal);
}

.feature-card:hover {
  border-color: var(--color-primary-light);
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}

.feature-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background: var(--color-primary-light);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--spacing-lg);
  color: var(--color-primary);
}

.feature-icon svg {
  width: 24px;
  height: 24px;
}

.feature-card h3 {
  font-size: 1.0625rem;
  font-weight: 600;
  color: var(--color-on-surface);
  margin-bottom: var(--spacing-sm);
  line-height: 1.4;
}

.feature-card p {
  font-size: 0.875rem;
  color: var(--color-on-surface-variant);
  line-height: 1.7;
}

.carriers-grid {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-md);
  justify-content: center;
}

.carrier-tag {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-lg);
  background: var(--color-surface);
  border: 1px solid var(--color-outline-variant);
  border-radius: var(--radius-full);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-on-surface);
  transition: all var(--transition-fast);
}

.carrier-tag:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background: var(--color-primary-light);
}

.carrier-tag svg {
  width: 16px;
  height: 16px;
  color: var(--color-primary);
}

.faq-list {
  max-width: 720px;
  margin: 0 auto;
}

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

.faq-item:first-child {
  border-top: 1px solid var(--color-outline-variant);
}

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: var(--spacing-lg) 0;
  background: none;
  border: none;
  cursor: pointer;
  text-align: left;
  font-family: var(--font-family);
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--color-on-surface);
  line-height: 1.5;
  gap: var(--spacing-md);
  transition: color var(--transition-fast);
}

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

.faq-question svg {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  color: var(--color-on-surface-variant);
  transition: transform var(--transition-normal);
}

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

.faq-answer {
  padding: 0 0 var(--spacing-lg) 0;
  font-size: 0.9375rem;
  color: var(--color-on-surface-variant);
  line-height: 1.7;
}

.faq-answer p + p {
  margin-top: var(--spacing-sm);
}

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

.contact-card {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-lg);
  padding: var(--spacing-xxl) var(--spacing-xxxl);
  background: var(--color-surface);
  border: 1px solid var(--color-outline-variant);
  border-radius: var(--radius-lg);
  margin-top: var(--spacing-xxl);
}

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

.contact-icon svg {
  width: 24px;
  height: 24px;
}

.contact-info {
  text-align: left;
}

.contact-label {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-on-surface-variant);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: var(--spacing-xs);
}

.contact-email {
  font-size: 1rem;
  font-weight: 500;
}

.contact-note {
  font-size: 0.8125rem;
  color: var(--color-on-surface-variant);
  margin-top: var(--spacing-xs);
}

footer {
  background: var(--color-inverse-surface);
  color: var(--color-inverse-on-surface);
  padding: var(--spacing-xxxl) 0;
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--spacing-lg);
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.footer-brand svg {
  width: 24px;
  height: 24px;
}

.footer-brand-name {
  font-size: 0.9375rem;
  font-weight: 600;
}

.footer-links {
  display: flex;
  gap: var(--spacing-xxl);
  align-items: center;
}

.footer-links a {
  font-size: 0.8125rem;
  color: rgba(255, 255, 255, 0.6);
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: #FFFFFF;
}

.footer-copy {
  font-size: 0.75rem;
  color: rgba(255, 255, 255, 0.4);
}

.legal-content {
  max-width: 720px;
  margin: 0 auto;
  padding: var(--spacing-massive) var(--spacing-lg);
}

.legal-content h1 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 700;
  color: var(--color-on-surface);
  margin-bottom: var(--spacing-xxxl);
}

.legal-updated {
  font-size: 0.875rem;
  color: var(--color-on-surface-variant);
  margin-top: calc(var(--spacing-md) * -1);
  margin-bottom: var(--spacing-xxxl);
}

.legal-section {
  margin-bottom: var(--spacing-xxxl);
}

.legal-section h2 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-on-surface);
  margin-bottom: var(--spacing-lg);
  padding-bottom: var(--spacing-sm);
  border-bottom: 2px solid var(--color-primary-light);
}

.legal-section h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-on-surface);
  margin-top: var(--spacing-xl);
  margin-bottom: var(--spacing-sm);
}

.legal-section p {
  font-size: 0.9375rem;
  color: var(--color-on-surface-variant);
  line-height: 1.8;
  margin-bottom: var(--spacing-md);
}

.legal-section ul {
  margin-bottom: var(--spacing-md);
  padding-left: var(--spacing-lg);
}

.legal-section li {
  font-size: 0.9375rem;
  color: var(--color-on-surface-variant);
  line-height: 1.8;
  margin-bottom: var(--spacing-xs);
  list-style: disc;
}

.legal-section li::marker {
  color: var(--color-primary);
}

.legal-section a {
  font-weight: 500;
}

.legal-service-list {
  margin-top: var(--spacing-md);
}

.legal-service-item {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-md);
  padding: var(--spacing-lg);
  background: var(--color-surface);
  border: 1px solid var(--color-outline-variant);
  border-radius: var(--radius-md);
  margin-bottom: var(--spacing-md);
}

.legal-service-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  background: var(--color-primary-light);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: var(--color-primary);
}

.legal-service-icon svg {
  width: 20px;
  height: 20px;
}

.legal-service-body h3 {
  margin-top: 0;
  margin-bottom: var(--spacing-xs);
}

.legal-service-body p {
  margin-bottom: var(--spacing-xs);
}

.legal-service-body p:last-child {
  margin-bottom: 0;
}

.legal-contact-box {
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
  padding: var(--spacing-xxl);
  background: var(--color-surface);
  border: 1px solid var(--color-outline-variant);
  border-radius: var(--radius-lg);
  margin-top: var(--spacing-lg);
}

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

.legal-contact-icon svg {
  width: 24px;
  height: 24px;
}

.legal-contact-info {
  font-size: 0.9375rem;
  color: var(--color-on-surface-variant);
  line-height: 1.7;
}

.legal-contact-info a {
  font-weight: 600;
}

.placeholder-notice {
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
  padding: var(--spacing-xxl);
  background: var(--color-primary-light);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(25, 118, 210, 0.2);
}

.placeholder-notice svg {
  width: 32px;
  height: 32px;
  flex-shrink: 0;
  color: var(--color-primary);
}

.placeholder-notice p {
  font-size: 0.9375rem;
  color: var(--color-primary-dark);
  line-height: 1.6;
}

.legal-back {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-xxxl);
  font-size: 0.875rem;
  font-weight: 500;
}

.legal-back svg {
  width: 16px;
  height: 16px;
}

@media (max-width: 1024px) {
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  :root {
    --header-height: 56px;
  }

  .hero {
    padding: var(--spacing-xxxl) 0;
  }

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

  .hero-icon {
    width: 80px;
    height: 80px;
  }

  .hero-subtitle {
    margin-left: auto;
    margin-right: auto;
  }

  .hero-actions {
    justify-content: center;
  }

  .features-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
  }

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

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

  .carrier-tag {
    font-size: 0.8125rem;
    padding: var(--spacing-xs) var(--spacing-md);
  }

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

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

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

  .footer-links {
    flex-wrap: wrap;
    justify-content: center;
  }

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

  .section-header {
    margin-bottom: var(--spacing-xxl);
  }

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

  .header-nav a:not(.lang-switch) {
    display: none;
  }
}