:root {
  --color-bg-base: #080C14;
  --color-bg-card: #0F172A;
  --color-bg-elevated: #162035;
  --color-border: rgba(148, 163, 184, 0.16);
  --color-border-glow: rgba(6, 182, 212, 0.4);
  --color-text-main: #F8FAFC;
  --color-text-muted: #94A3B8;
  --color-cyan: #06B6D4;
  --color-teal: #10B981;
  --color-warning: #F43F5E;
  --font-family: 'Noto Sans JP', 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --container-max: 1200px;
  --radius-lg: 16px;
  --radius-md: 10px;
  --radius-sm: 6px;
  --transition-fast: 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  background-color: var(--color-bg-base);
  color: var(--color-text-main);
  font-family: var(--font-family);
  -webkit-text-size-adjust: 100%;
}

body {
  line-height: 1.7;
  overflow-x: hidden;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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

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

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

/* Header & Navigation */
.site-header {
  position: sticky;
  top: 0;
  z-index: 99;
  background-color: rgba(8, 12, 20, 0.88);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--color-border);
}

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

.brand-emblem-group {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: -0.02em;
}

.brand-emblem-group img {
  width: 36px;
  height: 36px;
  border-radius: 8px;
}

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

.nav-menu-links a {
  font-size: 0.938rem;
  color: var(--color-text-muted);
  font-weight: 500;
  transition: color var(--transition-fast);
}

.nav-menu-links a:hover {
  color: var(--color-cyan);
}

.btn-header-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 24px;
  font-size: 0.938rem;
  font-weight: 600;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--color-cyan), var(--color-teal));
  color: #080C14;
  box-shadow: 0 4px 16px rgba(6, 182, 212, 0.25);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.btn-header-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(6, 182, 212, 0.35);
}

/* Hero Section */
.hero-section {
  padding: 80px 0 60px;
  position: relative;
  overflow: hidden;
}

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

.hero-badge-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: 9999px;
  background: rgba(6, 182, 212, 0.1);
  border: 1px solid rgba(6, 182, 212, 0.3);
  color: var(--color-cyan);
  font-size: 0.813rem;
  font-weight: 600;
  margin-bottom: 20px;
}

.hero-badge-pill span.dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--color-teal);
  box-shadow: 0 0 8px var(--color-teal);
}

.hero-title {
  font-size: 2.75rem;
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: -0.03em;
  margin-bottom: 20px;
}

.hero-title .gradient-text {
  background: linear-gradient(135deg, #F8FAFC 20%, var(--color-cyan) 80%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-lead-text {
  font-size: 1.063rem;
  color: var(--color-text-muted);
  line-height: 1.8;
  margin-bottom: 32px;
}

.hero-action-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px;
  margin-bottom: 40px;
}

.btn-hero-main {
  min-height: 52px;
  padding: 0 32px;
  font-size: 1rem;
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--color-cyan), var(--color-teal));
  color: #080C14;
  box-shadow: 0 6px 24px rgba(6, 182, 212, 0.3);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.btn-hero-main:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(6, 182, 212, 0.45);
}

.hero-guarantee-note {
  font-size: 0.813rem;
  color: var(--color-text-muted);
  display: flex;
  align-items: center;
  gap: 6px;
}

.hero-media-wrapper {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-border);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.6);
  aspect-ratio: 16 / 11;
}

.hero-media-wrapper img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: brightness(0.92);
}

.hero-overlay-tag {
  position: absolute;
  bottom: 16px;
  left: 16px;
  right: 16px;
  background: rgba(15, 23, 42, 0.85);
  backdrop-filter: blur(8px);
  padding: 12px 18px;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  font-size: 0.813rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* KPI Strip */
.kpi-strip {
  padding: 24px 0 60px;
}

.kpi-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.kpi-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  padding: 24px;
  border-radius: var(--radius-md);
  text-align: center;
}

.kpi-num {
  font-size: 2.25rem;
  font-weight: 800;
  color: var(--color-cyan);
  line-height: 1.1;
  margin-bottom: 6px;
  font-feature-settings: "tnum";
}

.kpi-label {
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

/* Section Common Layout */
.section-block {
  padding: 80px 0;
  border-top: 1px solid var(--color-border);
}

.section-head {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 52px;
}

.section-tag {
  font-size: 0.813rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--color-cyan);
  letter-spacing: 0.08em;
  margin-bottom: 8px;
}

.section-heading {
  font-size: 2.125rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.35;
  margin-bottom: 16px;
}

.section-desc {
  font-size: 1rem;
  color: var(--color-text-muted);
  line-height: 1.75;
}

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

.problem-card {
  background: var(--color-bg-card);
  border: 1px solid rgba(244, 63, 94, 0.2);
  padding: 32px 24px;
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: column;
}

.problem-icon {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: rgba(244, 63, 94, 0.12);
  color: var(--color-warning);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  margin-bottom: 20px;
}

.problem-card h3 {
  font-size: 1.188rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: #FFE4E6;
}

.problem-card p {
  font-size: 0.938rem;
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* Acoustic Simulation Studio */
.sim-studio-container {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border-glow);
  border-radius: var(--radius-lg);
  padding: 36px;
  box-shadow: 0 16px 40px rgba(6, 182, 212, 0.08);
}

.sim-control-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 24px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--color-border);
}

.sim-status-indicator {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 600;
  font-size: 0.938rem;
}

.sim-switch-group {
  display: flex;
  background: var(--color-bg-base);
  padding: 4px;
  border-radius: 8px;
  border: 1px solid var(--color-border);
}

.sim-switch-btn {
  background: transparent;
  border: none;
  color: var(--color-text-muted);
  font-family: inherit;
  font-size: 0.875rem;
  font-weight: 600;
  padding: 10px 20px;
  border-radius: 6px;
  cursor: pointer;
  transition: all var(--transition-fast);
  min-height: 44px;
}

.sim-switch-btn.active {
  background: var(--color-cyan);
  color: #080C14;
  box-shadow: 0 2px 8px rgba(6, 182, 212, 0.4);
}

.canvas-viewport {
  width: 100%;
  height: 220px;
  background: #05080E;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  position: relative;
  overflow: hidden;
}

canvas#acousticCanvas {
  width: 100%;
  height: 100%;
  display: block;
}

.sim-metrics-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 24px;
}

.sim-metric-box {
  background: var(--color-bg-elevated);
  padding: 18px 20px;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
}

.sim-metric-label {
  font-size: 0.813rem;
  color: var(--color-text-muted);
  margin-bottom: 4px;
}

.sim-metric-value {
  font-size: 1.5rem;
  font-weight: 800;
  font-feature-settings: "tnum";
}

.sim-metric-note {
  font-size: 0.75rem;
  margin-top: 4px;
}

/* 4-Layer Architecture */
.arch-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}

.arch-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 32px;
  position: relative;
  transition: transform var(--transition-fast), border-color var(--transition-fast);
}

.arch-card:hover {
  transform: translateY(-3px);
  border-color: var(--color-cyan);
}

.arch-layer-num {
  font-size: 0.75rem;
  font-weight: 800;
  text-transform: uppercase;
  color: var(--color-cyan);
  letter-spacing: 0.1em;
  margin-bottom: 8px;
}

.arch-card h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.arch-card p {
  font-size: 0.938rem;
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* Comparison Table */
.table-responsive {
  width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.comp-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  background: var(--color-bg-card);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-border);
}

.comp-table th, .comp-table td {
  padding: 18px 24px;
  border-bottom: 1px solid var(--color-border);
  font-size: 0.938rem;
}

.comp-table th {
  background: var(--color-bg-elevated);
  font-weight: 700;
  color: var(--color-text-main);
}

.comp-table th.highlight-col, .comp-table td.highlight-col {
  background: rgba(6, 182, 212, 0.08);
  color: #38BDF8;
  font-weight: 600;
}

/* Security & APPI Section */
.security-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 44px;
  align-items: center;
}

.security-media-box {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-border);
  aspect-ratio: 4 / 3;
}

.security-media-box img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.sec-features-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.sec-feature-item {
  display: flex;
  gap: 16px;
}

.sec-check-icon {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: rgba(16, 185, 129, 0.2);
  color: var(--color-teal);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  flex-shrink: 0;
  margin-top: 4px;
}

.sec-item-content h4 {
  font-size: 1.063rem;
  font-weight: 700;
  margin-bottom: 4px;
}

.sec-item-content p {
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

/* Direct Action Banner */
.action-banner {
  background: linear-gradient(135deg, #0F172A 0%, #162035 100%);
  border: 1px solid var(--color-border-glow);
  border-radius: var(--radius-lg);
  padding: 60px 40px;
  text-align: center;
  margin: 40px 0 80px;
}

.action-banner h2 {
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: 16px;
  line-height: 1.35;
}

.action-banner p {
  font-size: 1rem;
  color: var(--color-text-muted);
  max-width: 680px;
  margin: 0 auto 36px;
  line-height: 1.75;
}

.btn-banner-inquiry {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 54px;
  padding: 0 38px;
  font-size: 1.063rem;
  font-weight: 700;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--color-cyan), var(--color-teal));
  color: #080C14;
  box-shadow: 0 8px 32px rgba(6, 182, 212, 0.35);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.btn-banner-inquiry:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 36px rgba(6, 182, 212, 0.5);
}

.banner-email-hint {
  margin-top: 18px;
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

.banner-email-hint a {
  color: var(--color-cyan);
  text-decoration: underline;
}

/* FAQ (All Visible by Default - No Accordion Hiding) */
.faq-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

.faq-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 28px 32px;
}

.faq-card h3 {
  font-size: 1.063rem;
  font-weight: 700;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 12px;
  color: #E2E8F0;
}

.faq-badge-q {
  color: var(--color-cyan);
  font-size: 1.125rem;
  font-weight: 800;
}

.faq-card p {
  font-size: 0.938rem;
  color: var(--color-text-muted);
  line-height: 1.75;
  padding-left: 28px;
}

/* Site Footer */
.site-footer {
  background-color: #05080E;
  border-top: 1px solid var(--color-border);
  padding: 60px 0 32px;
  margin-top: auto;
}

.footer-top-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 48px;
}

.footer-brand-col p {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin-top: 12px;
  line-height: 1.7;
  max-width: 360px;
}

.footer-nav-col h4 {
  font-size: 0.938rem;
  font-weight: 700;
  color: var(--color-text-main);
  margin-bottom: 16px;
}

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

.footer-nav-col a {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  transition: color var(--transition-fast);
}

.footer-nav-col a:hover {
  color: var(--color-cyan);
}

.footer-bottom-bar {
  border-top: 1px solid rgba(148, 163, 184, 0.1);
  padding-top: 24px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  font-size: 0.813rem;
  color: var(--color-text-muted);
}

/* Cookie Management Platform (CMP) Widget */
.cmp-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  max-width: 440px;
  width: calc(100% - 48px);
  background: #0B111E;
  border: 1px solid var(--color-cyan);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: 0 20px 48px rgba(0, 0, 0, 0.85);
  z-index: 1000;
  font-size: 0.813rem;
  color: var(--color-text-main);
  line-height: 1.6;
}

.cmp-title {
  font-size: 0.938rem;
  font-weight: 700;
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.cmp-desc {
  color: var(--color-text-muted);
  margin-bottom: 16px;
}

.cmp-pills-row {
  display: flex;
  gap: 8px;
  margin-bottom: 18px;
  flex-wrap: wrap;
}

.cmp-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  border-radius: 6px;
  font-size: 0.75rem;
  font-weight: 600;
  border: 1px solid var(--color-border);
  background: var(--color-bg-card);
  color: var(--color-text-muted);
  cursor: pointer;
  min-height: 38px;
}

.cmp-pill.locked {
  cursor: not-allowed;
  opacity: 0.8;
  border-color: rgba(16, 185, 129, 0.3);
  color: var(--color-teal);
}

.cmp-pill.active {
  border-color: var(--color-cyan);
  color: var(--color-cyan);
  background: rgba(6, 182, 212, 0.1);
}

.cmp-actions {
  display: flex;
  gap: 8px;
}

.cmp-btn-accept {
  flex: 1;
  background: var(--color-cyan);
  color: #080C14;
  border: none;
  border-radius: 6px;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 10px;
  cursor: pointer;
  min-height: 44px;
}

.cmp-btn-reject {
  flex: 1;
  background: var(--color-bg-card);
  color: var(--color-text-muted);
  border: 1px solid var(--color-border);
  border-radius: 6px;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 10px;
  cursor: pointer;
  min-height: 44px;
}

/* Legal Pages Specific */
.legal-article-container {
  max-width: 820px;
  margin: 60px auto 80px;
  padding: 0 24px;
}

.legal-article-container h1 {
  font-size: 2.25rem;
  font-weight: 800;
  margin-bottom: 12px;
}

.legal-meta-date {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin-bottom: 40px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--color-border);
}

.legal-article-content section {
  margin-bottom: 36px;
}

.legal-article-content h2 {
  font-size: 1.375rem;
  font-weight: 700;
  margin-bottom: 14px;
  color: #E2E8F0;
}

.legal-article-content p, .legal-article-content ul {
  font-size: 0.938rem;
  color: var(--color-text-muted);
  line-height: 1.8;
  margin-bottom: 12px;
}

.legal-article-content ul {
  padding-left: 20px;
}

/* Responsive Adaptations */
@media (max-width: 992px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .kpi-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  .problem-grid, .arch-grid {
    grid-template-columns: 1fr;
  }
  .security-grid {
    grid-template-columns: 1fr;
  }
  .footer-top-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
}

@media (max-width: 768px) {
  .nav-menu-links {
    display: none;
  }
  .hero-title {
    font-size: 2rem;
  }
  .section-heading {
    font-size: 1.75rem;
  }
  .sim-studio-container {
    padding: 20px;
  }
  .sim-metrics-grid {
    grid-template-columns: 1fr;
    gap: 12px;
  }
  .cmp-container {
    left: 16px;
    right: 16px;
    bottom: 16px;
    width: auto;
  }
}