:root {
  --bg-primary: #10141a;
  --bg-surface: #171d26;
  --bg-surface-elevated: #202834;
  --bg-light: #f8f7f2;
  --bg-light-alt: #eeebe1;
  --text-main: #14181f;
  --text-muted: #57606e;
  --text-light: #f8f7f2;
  --text-light-muted: #9ea8b6;
  --accent-primary: #d96b3f;
  --accent-hover: #ba542b;
  --accent-glow: rgba(217, 107, 63, 0.2);
  --border-dark: #242e3d;
  --border-light: #d8d4c7;
  --border-accent: rgba(217, 107, 63, 0.45);
  --font-sans: 'Noto Sans JP', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'SFMono-Regular', Consolas, monospace;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 14px;
  --container-max: 1200px;
  --transition: all 0.22s cubic-bezier(0.16, 1, 0.3, 1);
}

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

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

body {
  line-height: 1.8;
  overflow-x: hidden;
  background-color: var(--bg-light);
}

.skip-link {
  position: absolute;
  top: -60px;
  left: 16px;
  background: var(--accent-primary);
  color: #fff;
  padding: 10px 16px;
  z-index: 9999;
  font-weight: 700;
  text-decoration: none;
  border-radius: var(--radius-sm);
  transition: top 0.2s ease;
}
.skip-link:focus { top: 16px; }

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

.section-dark {
  background-color: var(--bg-primary);
  color: var(--text-light);
  border-top: 1px solid var(--border-dark);
  border-bottom: 1px solid var(--border-dark);
}

.section-light {
  background-color: var(--bg-light);
  color: var(--text-main);
}

.section-alt {
  background-color: var(--bg-light-alt);
  color: var(--text-main);
  border-top: 1px solid var(--border-light);
  border-bottom: 1px solid var(--border-light);
}

.section-padding {
  padding: 88px 0;
}

h1, h2, h3, h4 {
  color: inherit;
  font-weight: 800;
  letter-spacing: -0.01em;
  line-height: 1.35;
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.84rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent-primary);
  margin-bottom: 14px;
}

.section-tag::before {
  content: "●";
  font-size: 0.8rem;
  color: var(--accent-primary);
}

.section-title {
  font-size: clamp(1.85rem, 3.8vw, 2.5rem);
  margin-bottom: 20px;
}

.section-desc {
  font-size: 1.06rem;
  color: var(--text-muted);
  max-width: 820px;
  line-height: 1.85;
  margin-bottom: 48px;
}
.section-dark .section-desc { color: var(--text-light-muted); }

/* Header & Navigation */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 68px;
  background: rgba(16, 20, 26, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-dark);
  z-index: 1000;
  display: flex;
  align-items: center;
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

.nav-brand {
  display: flex;
  align-items: center;
  text-decoration: none;
}

.nav-brand img {
  height: 38px;
  width: auto;
}

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

.nav-links a {
  color: var(--text-light-muted);
  text-decoration: none;
  font-size: 0.92rem;
  font-weight: 500;
  transition: var(--transition);
}

.nav-links a:hover, .nav-links a:focus-visible { color: #ffffff; }

.nav-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 9px 20px;
  font-size: 0.88rem;
  font-weight: 700;
  color: #fff;
  background: var(--accent-primary);
  border-radius: var(--radius-sm);
  text-decoration: none;
  transition: var(--transition);
}
.nav-cta:hover { background: var(--accent-hover); }

.mobile-nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--border-dark);
  color: var(--text-light);
  padding: 8px;
  border-radius: var(--radius-sm);
  cursor: pointer;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 28px;
  font-size: 1rem;
  font-weight: 700;
  text-decoration: none;
  border-radius: var(--radius-sm);
  transition: var(--transition);
  cursor: pointer;
  border: 1px solid transparent;
  min-height: 48px;
}

.btn-primary {
  background-color: var(--accent-primary);
  color: #ffffff;
  border-color: var(--accent-primary);
  box-shadow: 0 4px 14px var(--accent-glow);
}
.btn-primary:hover {
  background-color: var(--accent-hover);
  border-color: var(--accent-hover);
  transform: translateY(-1px);
}

.btn-outline {
  background-color: transparent;
  color: var(--text-light);
  border-color: var(--border-dark);
}
.btn-outline:hover {
  background-color: var(--bg-surface);
  border-color: var(--text-light-muted);
}

/* Signature Studio Frame Reticle */
.tech-frame {
  position: relative;
  border: 1px solid var(--border-dark);
  background: var(--bg-surface);
  border-radius: var(--radius-md);
  padding: 24px;
}
.section-light .tech-frame, .section-alt .tech-frame {
  border-color: var(--border-light);
  background: #ffffff;
}
.tech-frame::before {
  content: "⌜";
  position: absolute;
  top: 4px;
  left: 6px;
  font-family: var(--font-mono);
  font-size: 16px;
  color: var(--accent-primary);
  font-weight: 700;
}
.tech-frame::after {
  content: "⌟";
  position: absolute;
  bottom: 4px;
  right: 6px;
  font-family: var(--font-mono);
  font-size: 16px;
  color: var(--accent-primary);
  font-weight: 700;
}

/* SECTION 1: HERO */
.hero-section {
  position: relative;
  background-color: var(--bg-primary);
  color: var(--text-light);
  padding-top: 104px;
  padding-bottom: 64px;
  overflow: hidden;
  border-bottom: 1px solid var(--border-dark);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 44px;
  align-items: center;
}

.hero-stamp {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--accent-primary);
  letter-spacing: 0.08em;
  margin-bottom: 10px;
  display: block;
}

.hero-title {
  font-size: clamp(2rem, 4.2vw, 3rem);
  line-height: 1.28;
  margin-bottom: 18px;
  font-weight: 900;
}
.hero-title span { color: var(--accent-primary); }

.hero-subtitle {
  font-size: 1.05rem;
  line-height: 1.78;
  color: var(--text-light-muted);
  margin-bottom: 28px;
  max-width: 620px;
}

.hero-cta-group {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 24px;
}

.hero-visual-frame {
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--border-dark);
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.4);
  background: var(--bg-surface);
  aspect-ratio: 16/10;
}

.hero-visual-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* SECTION 2: PROBLEM FRAMING */
.problem-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
}

.problem-card {
  background: #ffffff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 28px;
  position: relative;
}
.problem-num {
  font-family: var(--font-mono);
  font-size: 0.88rem;
  color: var(--accent-primary);
  font-weight: 700;
  margin-bottom: 12px;
  display: block;
}
.problem-card h3 {
  font-size: 1.18rem;
  margin-bottom: 12px;
}
.problem-card p {
  font-size: 0.94rem;
  color: var(--text-muted);
  line-height: 1.75;
}

/* ASYMMETRIC EDITORIAL SPLIT */
.split-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}
.split-layout.reversed .split-visual { order: -1; }

.split-visual {
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--border-light);
  aspect-ratio: 4/3;
  box-shadow: 0 8px 24px rgba(0,0,0,0.06);
}
.section-dark .split-visual {
  border-color: var(--border-dark);
  box-shadow: 0 12px 28px rgba(0,0,0,0.3);
}
.split-visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.split-text h2 {
  font-size: clamp(1.65rem, 3.2vw, 2.2rem);
  margin-bottom: 18px;
}
.split-text p {
  font-size: 0.98rem;
  line-height: 1.85;
  margin-bottom: 16px;
}

/* SECTION 4: PILLARS */
.pillars-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 24px;
}
.pillar-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-dark);
  border-radius: var(--radius-md);
  padding: 32px;
  transition: var(--transition);
}
.pillar-card:hover {
  border-color: var(--border-accent);
  transform: translateY(-2px);
}
.pillar-icon {
  width: 48px;
  height: 48px;
  margin-bottom: 20px;
  color: var(--accent-primary);
}
.pillar-card h3 {
  font-size: 1.22rem;
  margin-bottom: 12px;
  color: var(--text-light);
}
.pillar-card p {
  font-size: 0.94rem;
  color: var(--text-light-muted);
  line-height: 1.75;
}

/* SECTION 6: STEPS */
.steps-stack {
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.step-row {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 24px;
  background: #ffffff;
  border: 1px solid var(--border-light);
  padding: 28px;
  border-radius: var(--radius-md);
  align-items: flex-start;
}
.step-num {
  font-family: var(--font-mono);
  font-size: 1.8rem;
  font-weight: 900;
  color: var(--accent-primary);
  line-height: 1;
}
.step-content h3 {
  font-size: 1.2rem;
  margin-bottom: 8px;
}
.step-content p {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.75;
}

/* TABLES */
.table-wrapper {
  width: 100%;
  overflow-x: auto;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-light);
  background: #ffffff;
}
.custom-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.95rem;
}
.custom-table th, .custom-table td {
  padding: 18px 24px;
  border-bottom: 1px solid var(--border-light);
}
.custom-table th {
  background: var(--bg-light-alt);
  font-weight: 700;
  font-size: 0.9rem;
}
.custom-table tr:last-child td { border-bottom: none; }
.section-dark .table-wrapper {
  border-color: var(--border-dark);
  background: var(--bg-surface);
}
.section-dark .custom-table th {
  background: var(--bg-surface-elevated);
  color: var(--text-light);
}
.section-dark .custom-table td {
  border-color: var(--border-dark);
  color: var(--text-light-muted);
}

/* MATRIX */
.matrix-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
}
.matrix-col {
  background: #ffffff;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-light);
  padding: 32px;
}
.matrix-col.in-scope { border-top: 4px solid var(--accent-primary); }
.matrix-col.out-scope { border-top: 4px solid #6c757d; }
.matrix-col h3 {
  font-size: 1.25rem;
  margin-bottom: 20px;
}
.matrix-list { list-style: none; }
.matrix-list li {
  padding: 12px 0;
  border-bottom: 1px solid var(--border-light);
  font-size: 0.94rem;
  display: flex;
  align-items: flex-start;
  gap: 12px;
}
.matrix-list li:last-child { border-bottom: none; }
.matrix-mark {
  font-family: var(--font-mono);
  font-weight: 700;
}
.in-scope .matrix-mark { color: var(--accent-primary); }
.out-scope .matrix-mark { color: #8892b0; }

/* FAQ */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
  max-width: 900px;
}
.faq-item {
  background: #ffffff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  overflow: hidden;
}
.faq-btn {
  width: 100%;
  padding: 22px 24px;
  text-align: left;
  background: none;
  border: none;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-main);
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  font-family: var(--font-sans);
}
.faq-icon {
  font-family: var(--font-mono);
  font-size: 1.3rem;
  color: var(--accent-primary);
  transition: transform 0.2s ease;
}
.faq-item.active .faq-icon { transform: rotate(45deg); }
.faq-body {
  padding: 0 24px 22px 24px;
  display: none;
  font-size: 0.95rem;
  line-height: 1.85;
  color: var(--text-muted);
  border-top: 1px dashed var(--border-light);
  padding-top: 16px;
}
.faq-item.active .faq-body { display: block; }

/* CONTACT FORM */
.form-container-box {
  background: var(--bg-surface);
  border: 1px solid var(--border-dark);
  border-radius: var(--radius-lg);
  padding: 40px;
  color: var(--text-light);
  max-width: 860px;
  margin: 0 auto;
}
.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}
.form-group { margin-bottom: 20px; }
.form-label {
  display: block;
  font-size: 0.9rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--text-light);
}
.form-label .badge-req {
  background: var(--accent-primary);
  color: #fff;
  font-size: 0.72rem;
  padding: 2px 6px;
  border-radius: 2px;
  margin-left: 6px;
}
.form-label .badge-opt {
  background: var(--border-dark);
  color: var(--text-light-muted);
  font-size: 0.72rem;
  padding: 2px 6px;
  border-radius: 2px;
  margin-left: 6px;
}
.form-control {
  width: 100%;
  padding: 13px 16px;
  background: var(--bg-primary);
  border: 1px solid var(--border-dark);
  border-radius: var(--radius-sm);
  color: #ffffff;
  font-size: 0.95rem;
  font-family: inherit;
  transition: var(--transition);
}
.form-control:focus {
  outline: none;
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px var(--accent-glow);
}
textarea.form-control {
  min-height: 120px;
  resize: vertical;
}

.notice-box {
  background: var(--bg-primary);
  border: 1px solid var(--border-dark);
  padding: 18px;
  border-radius: var(--radius-sm);
  font-size: 0.84rem;
  color: var(--text-light-muted);
  line-height: 1.7;
  margin-bottom: 20px;
}
.notice-box h4 {
  font-size: 0.88rem;
  color: var(--text-light);
  margin-bottom: 6px;
}

.checkbox-group {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin-bottom: 16px;
  font-size: 0.88rem;
  color: var(--text-light-muted);
  cursor: pointer;
}
.checkbox-group input[type="checkbox"] {
  margin-top: 4px;
  accent-color: var(--accent-primary);
  width: 16px;
  height: 16px;
  cursor: pointer;
}
.checkbox-group a {
  color: var(--accent-primary);
  text-decoration: underline;
}

.review-card {
  display: none;
  background: var(--bg-primary);
  border: 1px solid var(--border-dark);
  padding: 24px;
  border-radius: var(--radius-md);
  margin-bottom: 24px;
}
.review-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.92rem;
}
.review-table th, .review-table td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--border-dark);
  text-align: left;
}
.review-table th { width: 35%; color: var(--text-light-muted); }
.review-table td { color: #fff; font-weight: 500; }

.form-success-box {
  display: none;
  text-align: center;
  padding: 48px 24px;
  background: var(--bg-surface);
  border: 1px solid var(--border-dark);
  border-radius: var(--radius-lg);
}
.form-success-box:focus { outline: none; }
.form-success-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 20px;
  color: var(--accent-primary);
}
.form-success-box h3 {
  font-size: 1.6rem;
  color: #fff;
  margin-bottom: 14px;
}
.form-success-box p {
  color: var(--text-light-muted);
  max-width: 580px;
  margin: 0 auto 16px;
  line-height: 1.75;
}

/* FOOTER */
.site-footer {
  background: #090c10;
  color: var(--text-light-muted);
  padding: 64px 0 32px;
  border-top: 1px solid var(--border-dark);
  font-size: 0.9rem;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}
.footer-brand p {
  margin-top: 14px;
  line-height: 1.75;
  max-width: 420px;
}
.footer-col h4 {
  color: #fff;
  font-size: 0.96rem;
  margin-bottom: 18px;
}
.footer-links { list-style: none; }
.footer-links li { margin-bottom: 10px; }
.footer-links a {
  color: var(--text-light-muted);
  text-decoration: none;
  transition: var(--transition);
}
.footer-links a:hover { color: #fff; }
.footer-bottom {
  border-top: 1px solid #171d26;
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 0.84rem;
}

/* Cookie Banner */
.cookie-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
  background: var(--bg-surface-elevated);
  border-top: 1px solid var(--border-dark);
  padding: 20px 24px;
  z-index: 9999;
  box-shadow: 0 -8px 24px rgba(0,0,0,0.4);
  display: none;
}
.cookie-banner-inner {
  max-width: var(--container-max);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}
.cookie-banner-text {
  flex: 1 1 500px;
  color: var(--text-light-muted);
  font-size: 0.88rem;
  line-height: 1.6;
}
.cookie-banner-text a {
  color: var(--accent-primary);
  text-decoration: underline;
}
.cookie-banner-actions { display: flex; gap: 12px; }

/* MANDATORY MOBILE CSS RULES (Max-width 768px) */
@media (max-width: 768px) {
  .site-header {
    height: 56px;
    padding: 0 16px;
  }
  .nav-links { display: none; }
  .nav-links.active {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 56px;
    left: 0;
    width: 100%;
    background: var(--bg-primary);
    padding: 24px;
    border-bottom: 1px solid var(--border-dark);
    gap: 16px;
  }
  .mobile-nav-toggle { display: block; }
  .hero-section {
    padding-top: 76px;
    padding-bottom: 32px;
  }
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  .hero-title {
    font-size: clamp(1.55rem, 5.5vw, 1.85rem);
    line-height: 1.28;
    margin-bottom: 12px;
  }
  .hero-subtitle {
    font-size: 0.9rem;
    line-height: 1.55;
    margin-bottom: 18px;
  }
  .hero-cta-group {
    margin-bottom: 18px;
    flex-direction: column;
  }
  .hero-visual-frame {
    max-height: 230px;
    aspect-ratio: 16/9;
    width: 100%;
    margin: 0 auto;
  }
  .split-layout, .split-layout.reversed {
    grid-template-columns: 1fr;
    gap: 28px;
  }
  .split-layout.reversed .split-visual { order: 0; }
  .form-grid, .matrix-grid, .footer-grid { grid-template-columns: 1fr; gap: 24px; }
  .form-container-box { padding: 24px 16px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}