:root {
  color-scheme: light;
  --landing-bg: #fbfbfa;
  --landing-surface: #ffffff;
  --landing-surface-subtle: #f4f4f1;
  --landing-surface-inset: #edece8;
  --landing-border: #e5e5e0;
  --landing-border-strong: #d0d0c8;
  --landing-text-main: #0d121c;
  --landing-text-sub: #4b5565;
  --landing-text-muted: #6e7787;
  --landing-accent: #1e3a8a;
  --landing-accent-hover: #172554;
  --landing-accent-subtle: #eff6ff;
  --landing-accent-border: #bfdbfe;
  --landing-rule: #e8e8e3;
  --landing-paper-shadow: 0 1px 3px rgba(15, 23, 42, 0.05), 0 24px 48px -18px rgba(15, 23, 42, 0.12);
  --landing-card-shadow: 0 1px 2px rgba(15, 23, 42, 0.04);
  --font-editorial: 'EB Garamond', 'Playfair Display', Georgia, serif;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', Menlo, monospace;
}
:root[data-theme="dark"] {
  color-scheme: dark;
  --landing-bg: #090d13;
  --landing-surface: #111620;
  --landing-surface-subtle: #171e2b;
  --landing-surface-inset: #1f2736;
  --landing-border: #232c3d;
  --landing-border-strong: #334055;
  --landing-text-main: #f0f4f9;
  --landing-text-sub: #9caabf;
  --landing-text-muted: #6f7e94;
  --landing-accent: #5b95f7;
  --landing-accent-hover: #7eb0fa;
  --landing-accent-subtle: rgba(91, 149, 247, 0.12);
  --landing-accent-border: rgba(91, 149, 247, 0.32);
  --landing-rule: #1e2634;
  --landing-paper-shadow: 0 2px 8px rgba(0, 0, 0, 0.45), 0 32px 70px -18px rgba(0, 0, 0, 0.75);
  --landing-card-shadow: 0 1px 3px rgba(0, 0, 0, 0.25);
}
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
body {
  background-color: var(--landing-bg);
  color: var(--landing-text-main);
  font-family: var(--font-sans);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  transition: background-color 0.2s ease, color 0.2s ease;
}
.container {
  width: 100%;
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 28px;
}
.container-narrow {
  width: 100%;
  max-width: 860px;
  margin: 0 auto;
  padding: 0 28px;
}
h1, h2, h3, h4 {
  color: var(--landing-text-main);
  font-weight: 600;
  line-height: 1.25;
  letter-spacing: -0.02em;
}
p {
  color: var(--landing-text-sub);
  font-size: 1.05rem;
  line-height: 1.68;
}
a {
  color: inherit;
  text-decoration: none;
}
.section-rule {
  border: none;
  border-top: 1px solid var(--landing-rule);
  margin: 0;
}
.nav-bar {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--landing-bg);
  border-bottom: 1px solid var(--landing-border);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: background-color 0.2s ease, border-color 0.2s ease;
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}
.nav-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}
.nav-logo-icon {
  width: 32px;
  height: 32px;
  border-radius: 6px;
  background-color: var(--landing-accent);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
:root[data-theme="dark"] .nav-logo-icon {
  background-color: var(--landing-accent);
  color: #090d13;
}
.nav-titles {
  display: flex;
  flex-direction: column;
}
.nav-brand-name {
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: -0.015em;
  color: var(--landing-text-main);
}
.nav-brand-sub {
  font-size: 0.72rem;
  color: var(--landing-text-muted);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  font-family: var(--font-mono);
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
}
.nav-link {
  font-size: 0.92rem;
  color: var(--landing-text-sub);
  font-weight: 500;
  transition: color 0.15s ease;
}
.nav-link:hover {
  color: var(--landing-accent);
}
.nav-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}
.theme-btn {
  width: 34px;
  height: 34px;
  border-radius: 7px;
  border: 1px solid var(--landing-border);
  background-color: var(--landing-surface);
  color: var(--landing-text-sub);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: background-color 0.15s, border-color 0.15s, color 0.15s;
}
.theme-btn:hover {
  background-color: var(--landing-surface-subtle);
  border-color: var(--landing-border-strong);
  color: var(--landing-text-main);
}
.theme-btn .icon-sun { display: none !important; }
.theme-btn .icon-moon { display: block !important; }
:root[data-theme="dark"] .theme-btn .icon-sun { display: block !important; }
:root[data-theme="dark"] .theme-btn .icon-moon { display: none !important; }
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background-color: var(--landing-accent);
  color: #ffffff;
  padding: 8px 18px;
  border-radius: 7px;
  font-size: 0.92rem;
  font-weight: 600;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background-color 0.15s ease, transform 0.1s ease;
  white-space: nowrap;
}
:root[data-theme="dark"] .btn-primary {
  background-color: var(--landing-accent);
  color: #090d13;
}
.btn-primary:hover {
  background-color: var(--landing-accent-hover);
}
.btn-primary:active {
  transform: translateY(1px);
}
.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background-color: var(--landing-surface);
  color: var(--landing-text-main);
  padding: 8px 18px;
  border-radius: 7px;
  font-size: 0.92rem;
  font-weight: 500;
  border: 1px solid var(--landing-border-strong);
  cursor: pointer;
  transition: background-color 0.15s ease, border-color 0.15s ease;
  white-space: nowrap;
}
.btn-secondary:hover {
  background-color: var(--landing-surface-subtle);
  border-color: var(--landing-text-muted);
}
.hero-section {
  padding: 84px 0 72px;
  text-align: center;
  position: relative;
}
.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 4px 12px;
  border-radius: 20px;
  background-color: var(--landing-surface-subtle);
  border: 1px solid var(--landing-border);
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--landing-text-muted);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin-bottom: 24px;
}
.hero-eyebrow .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: #16a34a;
}
.hero-title {
  font-family: var(--font-editorial);
  font-size: clamp(2.4rem, 5.2vw, 4.2rem);
  font-weight: 600;
  line-height: 1.12;
  letter-spacing: -0.03em;
  color: var(--landing-text-main);
  max-width: 980px;
  margin: 0 auto 24px;
}
.hero-title em {
  font-style: italic;
  font-weight: 400;
  color: var(--landing-accent);
}
.hero-desc {
  font-size: clamp(1.08rem, 1.6vw, 1.28rem);
  color: var(--landing-text-sub);
  max-width: 740px;
  margin: 0 auto 36px;
  line-height: 1.65;
}
.hero-cta-group {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 24px;
}
.hero-cta-group .btn-primary {
  padding: 12px 28px;
  font-size: 1.02rem;
  border-radius: 8px;
}
.hero-cta-group .btn-secondary {
  padding: 12px 24px;
  font-size: 1.02rem;
  border-radius: 8px;
}
.hero-meta-strip {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 28px;
  flex-wrap: wrap;
  color: var(--landing-text-muted);
  font-size: 0.84rem;
  margin-bottom: 64px;
}
.hero-meta-item {
  display: flex;
  align-items: center;
  gap: 6px;
}
.hero-meta-item svg {
  color: var(--landing-accent);
  flex-shrink: 0;
}
.specimen-stage {
  margin: 0 auto;
  max-width: 920px;
  position: relative;
}
.specimen-wrapper {
  background-color: var(--landing-surface-subtle);
  border: 1px solid var(--landing-border);
  border-radius: 12px;
  padding: 44px 28px;
  display: flex;
  flex-direction: column;
  align-items: center;
  position: relative;
}
.specimen-stage-badge {
  position: absolute;
  top: 14px;
  left: 20px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--landing-text-muted);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}
.specimen-stage-actions {
  position: absolute;
  top: 10px;
  right: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.specimen-style-select {
  padding: 4px 10px;
  font-size: 0.78rem;
  font-family: var(--font-sans);
  border-radius: 6px;
  border: 1px solid var(--landing-border-strong);
  background-color: var(--landing-surface);
  color: var(--landing-text-main);
  cursor: pointer;
}
.paper-sheet {
  width: 100%;
  max-width: 720px;
  min-height: 860px;
  background-color: #ffffff;
  color: #0f172a;
  box-shadow: var(--landing-paper-shadow);
  border: 1px solid rgba(0, 0, 0, 0.08);
  border-radius: 3px;
  padding: 56px 54px;
  display: flex;
  flex-direction: column;
  text-align: left;
  position: relative;
  font-family: var(--font-sans);
  font-size: 10.5pt;
  line-height: 1.55;
  transition: all 0.2s ease;
}
.paper-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  padding-bottom: 22px;
  border-bottom: 1.5px solid var(--doc-accent, #1e3a8a);
  margin-bottom: 28px;
}
.paper-brand {
  display: flex;
  align-items: center;
  gap: 14px;
}
.paper-logo {
  width: 44px;
  height: 44px;
  object-fit: contain;
}
.paper-org-name {
  font-size: 13.5pt;
  font-weight: 700;
  letter-spacing: 0.03em;
  color: var(--doc-accent, #1e3a8a);
  text-transform: uppercase;
  margin-bottom: 2px;
}
.paper-org-tagline {
  font-size: 8.5pt;
  color: #64748b;
  letter-spacing: 0.02em;
}
.paper-contact-block {
  text-align: right;
  font-size: 8pt;
  color: #475467;
  line-height: 1.45;
}
.paper-meta-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  font-size: 9pt;
  color: #475467;
  margin-bottom: 24px;
}
.paper-meta-ref {
  font-family: var(--font-mono);
  font-size: 8.5pt;
}
.paper-recipient {
  margin-bottom: 26px;
  font-size: 9.5pt;
  color: #334155;
  line-height: 1.45;
}
.paper-recipient strong {
  color: #0f172a;
  font-size: 10pt;
}
.paper-subject {
  font-size: 11pt;
  font-weight: 700;
  color: var(--doc-accent, #1e3a8a);
  letter-spacing: 0.01em;
  margin-bottom: 16px;
  text-transform: uppercase;
}
.paper-body {
  font-size: 10pt;
  color: #1e293b;
  line-height: 1.62;
  margin-bottom: 28px;
}
.paper-body p {
  color: #1e293b;
  font-size: 10pt;
  margin-bottom: 14px;
}
.paper-signoff {
  margin-top: auto;
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  padding-top: 24px;
}
.paper-signature-block {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.paper-signature-img {
  height: 38px;
  width: auto;
  object-fit: contain;
  margin-bottom: 4px;
  filter: brightness(0.2) sepia(1) hue-rotate(190deg);
}
.paper-signer-name {
  font-weight: 700;
  font-size: 9.5pt;
  color: #0f172a;
}
.paper-signer-title {
  font-size: 8.5pt;
  color: #64748b;
}
.paper-seal-block {
  display: flex;
  align-items: center;
  gap: 12px;
}
.paper-seal-img {
  width: 60px;
  height: 60px;
  opacity: 0.85;
}
.paper-footer {
  margin-top: 28px;
  padding-top: 14px;
  border-top: 1px solid #e2e8f0;
  display: flex;
  justify-content: space-between;
  font-size: 7.5pt;
  color: #64748b;
}
.specimen-callout {
  position: absolute;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 4px 10px;
  background-color: var(--landing-surface);
  border: 1px solid var(--landing-border-strong);
  border-radius: 6px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--landing-text-sub);
  box-shadow: var(--landing-card-shadow);
  pointer-events: none;
}
.specimen-callout::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--landing-accent);
}
.comparison-section {
  padding: 104px 0;
}
.section-eyebrow {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--landing-accent);
  margin-bottom: 12px;
}
.section-heading {
  font-family: var(--font-editorial);
  font-size: clamp(2rem, 3.8vw, 3rem);
  font-weight: 600;
  line-height: 1.2;
  margin-bottom: 20px;
  max-width: 780px;
}
.section-lead {
  font-size: 1.15rem;
  color: var(--landing-text-sub);
  max-width: 720px;
  margin-bottom: 56px;
}
.comparison-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.comparison-col {
  padding: 32px 28px;
  border-radius: 10px;
  border: 1px solid var(--landing-border);
  background-color: var(--landing-surface);
  display: flex;
  flex-direction: column;
  transition: border-color 0.2s;
}
.comparison-col.highlighted {
  border-color: var(--landing-accent);
  background-color: var(--landing-surface);
  position: relative;
}
.col-badge {
  align-self: flex-start;
  padding: 3px 8px;
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 16px;
  background-color: var(--landing-surface-subtle);
  color: var(--landing-text-muted);
}
.col-badge.recommended {
  background-color: var(--landing-accent-subtle);
  color: var(--landing-accent);
  border: 1px solid var(--landing-accent-border);
  font-weight: 600;
}
.col-title {
  font-size: 1.22rem;
  font-weight: 700;
  margin-bottom: 10px;
}
.col-summary {
  font-size: 0.95rem;
  color: var(--landing-text-sub);
  margin-bottom: 24px;
  line-height: 1.55;
}
.col-points {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-top: auto;
}
.col-point {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.9rem;
  line-height: 1.5;
  color: var(--landing-text-sub);
}
.col-point svg {
  flex-shrink: 0;
  margin-top: 3px;
}
.col-point.con svg {
  color: #dc2626;
}
.col-point.pro svg {
  color: #16a34a;
}
.pillars-section {
  padding: 96px 0;
  background-color: var(--landing-surface-subtle);
  border-top: 1px solid var(--landing-border);
  border-bottom: 1px solid var(--landing-border);
}
.pillars-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 40px;
  margin-top: 48px;
}
.pillar-item {
  padding: 36px 32px;
  background-color: var(--landing-surface);
  border: 1px solid var(--landing-border);
  border-radius: 10px;
  display: flex;
  flex-direction: column;
}
.pillar-num {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--landing-accent);
  margin-bottom: 16px;
  letter-spacing: 0.05em;
}
.pillar-title {
  font-family: var(--font-editorial);
  font-size: 1.55rem;
  font-weight: 600;
  margin-bottom: 12px;
  line-height: 1.3;
}
.pillar-desc {
  font-size: 0.98rem;
  color: var(--landing-text-sub);
  line-height: 1.65;
  margin-bottom: 18px;
}
.pillar-meta {
  margin-top: auto;
  padding-top: 16px;
  border-top: 1px solid var(--landing-rule);
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--landing-text-muted);
  display: flex;
  align-items: center;
  gap: 8px;
}
.specs-section {
  padding: 104px 0;
}
.specs-table-wrap {
  margin-top: 44px;
  border: 1px solid var(--landing-border);
  border-radius: 10px;
  overflow: hidden;
  background-color: var(--landing-surface);
}
.specs-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
}
.specs-table th {
  padding: 14px 22px;
  background-color: var(--landing-surface-subtle);
  border-bottom: 1px solid var(--landing-border);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--landing-text-muted);
  font-weight: 600;
}
.specs-table td {
  padding: 18px 22px;
  border-bottom: 1px solid var(--landing-border);
  font-size: 0.94rem;
  color: var(--landing-text-sub);
  vertical-align: top;
}
.specs-table tr:last-child td {
  border-bottom: none;
}
.specs-table td:first-child {
  font-weight: 600;
  color: var(--landing-text-main);
  width: 28%;
}
.specs-table code {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  padding: 2px 6px;
  background-color: var(--landing-surface-subtle);
  border: 1px solid var(--landing-border);
  border-radius: 4px;
  color: var(--landing-text-main);
}
.cta-section {
  padding: 108px 0;
  text-align: center;
  position: relative;
  background-color: var(--landing-surface);
  border-top: 1px solid var(--landing-border);
}
.cta-title {
  font-family: var(--font-editorial);
  font-size: clamp(2.2rem, 4vw, 3.4rem);
  font-weight: 600;
  line-height: 1.18;
  margin-bottom: 18px;
  color: var(--landing-text-main);
}
.cta-desc {
  font-size: 1.15rem;
  color: var(--landing-text-sub);
  max-width: 620px;
  margin: 0 auto 36px;
}
.cta-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
}
.cta-actions .btn-primary {
  padding: 14px 34px;
  font-size: 1.05rem;
  border-radius: 8px;
}
.landing-footer {
  padding: 56px 0;
  border-top: 1px solid var(--landing-border);
  background-color: var(--landing-bg);
  font-size: 0.88rem;
  color: var(--landing-text-muted);
}
.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 20px;
}
.footer-left {
  display: flex;
  align-items: center;
  gap: 16px;
}
.footer-brand {
  font-weight: 700;
  color: var(--landing-text-main);
}
.footer-links {
  display: flex;
  gap: 24px;
  list-style: none;
}
.footer-links a:hover {
  color: var(--landing-text-main);
}
@media (max-width: 900px) {
  .comparison-grid {
    grid-template-columns: 1fr;
  }
  .pillars-grid {
    grid-template-columns: 1fr;
  }
  .paper-sheet {
    padding: 36px 28px;
  }
  .paper-header {
    flex-direction: column;
    gap: 16px;
  }
  .paper-contact-block {
    text-align: left;
  }
  .specimen-callout {
    display: none; 
  }
}
@media (max-width: 680px) {
  .nav-links {
    display: none; 
  }
  .nav-brand-sub {
    display: none; 
  }
  .nav-inner {
    height: 60px;
  }
  .hero-section {
    padding: 54px 0 44px;
  }
  .hero-meta-strip {
    flex-direction: column;
    gap: 10px;
  }
  .specs-table td:first-child {
    width: 35%;
  }
  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
  }
}