:root {
  --bg-main: #fbfbf9;
  --bg-surface: #ffffff;
  --bg-alt: #f1f5f9;
  --text-main: #0f172a;
  --text-muted: #475569;
  --text-light: #64748b;
  --accent: #10b981;
  --accent-dark: #059669;
  --accent-soft: #ecfdf5;
  --primary: #0f172a;
  --border: #e2e8f0;
  --border-focus: #10b981;
  --radius: 12px;
  --radius-lg: 20px;
  --shadow-sm: 0 2px 4px rgba(15, 23, 42, 0.04);
  --shadow-md: 0 10px 25px -5px rgba(15, 23, 42, 0.08), 0 8px 10px -6px rgba(15, 23, 42, 0.04);
  --container-max: 1180px;
  --font-stack: -apple-system, BlinkMacSystemFont, "Segoe UI", "Hiragino Kaku Gothic ProN", "BIZ UDPGothic", Meiryo, sans-serif;
}

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

body {
  font-family: var(--font-stack);
  background-color: var(--bg-main);
  color: var(--text-main);
  line-height: 1.7;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  word-break: break-word;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: var(--accent);
}

.skip-link {
  position: absolute;
  top: -40px;
  left: 10px;
  background: var(--primary);
  color: #fff;
  padding: 8px 16px;
  z-index: 100;
  border-radius: 4px;
}

.skip-link:focus {
  top: 10px;
}

.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}

/* Header & Nav */
.site-header {
  position: sticky;
  top: 0;
  background: rgba(251, 251, 249, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  z-index: 50;
}

.nav-wrapper {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--primary);
}

.brand-logo img, .brand-logo svg {
  width: 36px;
  height: 36px;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
}

.nav-link {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-muted);
}

.nav-link.active, .nav-link:hover {
  color: var(--primary);
}

.nav-cta {
  background: var(--primary);
  color: #ffffff !important;
  padding: 10px 20px;
  border-radius: 8px;
  font-size: 0.9rem;
  font-weight: 600;
  transition: background 0.2s ease, transform 0.1s ease;
}

.nav-cta:hover {
  background: var(--accent-dark);
  transform: translateY(-1px);
}

.mobile-menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  padding: 6px;
  color: var(--primary);
}

/* Hero Section */
.hero-section {
  padding: 70px 0 60px;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 48px;
  align-items: center;
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  background: var(--accent-soft);
  color: var(--accent-dark);
  border: 1px solid rgba(16, 185, 129, 0.2);
  border-radius: 999px;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 20px;
}

.hero-title {
  font-size: clamp(2rem, 4vw, 2.9rem);
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: -0.03em;
  color: var(--primary);
  margin-bottom: 20px;
}

.hero-lead {
  font-size: 1.1rem;
  color: var(--text-muted);
  line-height: 1.75;
  margin-bottom: 32px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 26px;
  border-radius: 8px;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  border: 1px solid transparent;
}

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

.btn-primary:hover {
  background: var(--accent-dark);
  color: #ffffff;
}

.btn-secondary {
  background: var(--bg-surface);
  color: var(--primary);
  border-color: var(--border);
}

.btn-secondary:hover {
  background: var(--bg-alt);
  border-color: #cbd5e1;
}

.hero-visual {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-md);
}

/* Feature Cards & Grid */
.section {
  padding: 70px 0;
}

.section-alt {
  background-color: #ffffff;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 50px;
}

.section-badge {
  color: var(--accent-dark);
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 8px;
}

.section-title {
  font-size: clamp(1.75rem, 3vw, 2.3rem);
  font-weight: 800;
  color: var(--primary);
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}

.section-desc {
  color: var(--text-muted);
  font-size: 1.05rem;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}

.card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.card-icon {
  width: 52px;
  height: 52px;
  border-radius: 12px;
  background: var(--accent-soft);
  color: var(--accent-dark);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}

.card-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--primary);
}

.card-text {
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.65;
}

/* Process Timeline */
.process-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.process-step {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 22px;
  position: relative;
}

.step-num {
  font-size: 2rem;
  font-weight: 900;
  color: var(--accent);
  opacity: 0.85;
  line-height: 1;
  margin-bottom: 14px;
}

.step-title {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--primary);
}

.step-desc {
  font-size: 0.9rem;
  color: var(--text-muted);
}

/* Pricing Card */
.pricing-wrapper {
  max-width: 680px;
  margin: 0 auto;
}

.pricing-card {
  background: var(--bg-surface);
  border: 2px solid var(--primary);
  border-radius: var(--radius-lg);
  padding: 44px;
  box-shadow: var(--shadow-md);
  text-align: center;
  position: relative;
}

.pricing-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--accent);
  color: #ffffff;
  padding: 4px 18px;
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.price-tag {
  margin: 24px 0;
}

.price-amount {
  font-size: 3.2rem;
  font-weight: 900;
  color: var(--primary);
  letter-spacing: -0.03em;
}

.price-period {
  color: var(--text-light);
  font-size: 1rem;
  margin-left: 6px;
}

.pricing-features {
  list-style: none;
  text-align: left;
  max-width: 480px;
  margin: 28px auto 36px;
}

.pricing-features li {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 0.95rem;
}

.pricing-features li:last-child {
  border-bottom: none;
}

/* FAQ Details */
.faq-list {
  max-width: 820px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

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

.faq-question {
  padding: 20px 24px;
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--primary);
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.faq-question::-webkit-details-marker {
  display: none;
}

.faq-question::after {
  content: "+";
  font-size: 1.4rem;
  color: var(--accent-dark);
  font-weight: 400;
  transition: transform 0.2s ease;
}

details[open] .faq-question::after {
  content: "−";
}

.faq-answer {
  padding: 0 24px 22px;
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.7;
}

/* Contact Details Box */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 36px;
}

.contact-info-card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px;
}

.info-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 24px;
}

.info-icon {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: var(--accent-soft);
  color: var(--accent-dark);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

/* Footer */
.site-footer {
  background: var(--primary);
  color: #94a3b8;
  padding: 60px 0 30px;
  margin-top: 80px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid #1e293b;
}

.footer-brand h3 {
  color: #f8fafc;
  font-size: 1.25rem;
  margin-bottom: 12px;
}

.footer-brand p {
  font-size: 0.9rem;
  line-height: 1.6;
  max-width: 380px;
}

.footer-col h4 {
  color: #f8fafc;
  font-size: 0.95rem;
  margin-bottom: 16px;
  letter-spacing: 0.02em;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-links a {
  color: #94a3b8;
  font-size: 0.9rem;
}

.footer-links a:hover {
  color: #38bdf8;
}

.footer-bottom {
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.85rem;
}

/* Cookie Banner */
.cookie-banner {
  position: fixed;
  bottom: 20px;
  left: 20px;
  right: 20px;
  max-width: 580px;
  margin: 0 auto;
  background: #ffffff;
  color: var(--primary);
  border: 1px solid var(--border);
  box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.15), 0 10px 10px -5px rgba(0, 0, 0, 0.08);
  border-radius: var(--radius);
  padding: 20px 24px;
  z-index: 1000;
  display: none;
}

.cookie-content {
  font-size: 0.88rem;
  line-height: 1.6;
  margin-bottom: 16px;
  color: var(--text-muted);
}

.cookie-actions {
  display: flex;
  gap: 12px;
  justify-content: flex-end;
}

.cookie-btn {
  padding: 8px 18px;
  border-radius: 6px;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid transparent;
}

.cookie-accept {
  background: var(--primary);
  color: #ffffff;
}

.cookie-decline {
  background: var(--bg-alt);
  color: var(--text-main);
  border-color: var(--border);
}

/* Responsive */
@media (max-width: 900px) {
  .hero-grid, .contact-grid {
    grid-template-columns: 1fr;
  }
  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }
  .process-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 680px) {
  .mobile-menu-toggle {
    display: block;
  }
  .nav-menu {
    position: absolute;
    top: 76px;
    left: 0;
    width: 100%;
    background: var(--bg-surface);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    padding: 24px;
    display: none;
    box-shadow: var(--shadow-md);
  }
  .nav-menu.open {
    display: flex;
  }
  .grid-3, .grid-2, .process-grid {
    grid-template-columns: 1fr;
  }
  .pricing-card {
    padding: 28px 18px;
  }
  .footer-bottom {
    flex-direction: column;
    gap: 10px;
    text-align: center;
  }
}