:root {
  color-scheme: dark;
  --bg: oklch(0.105 0.008 158);
  --surface: oklch(0.155 0.010 158);
  --surface-strong: oklch(0.195 0.014 158);
  --ink: oklch(0.96 0.004 158);
  --muted: oklch(0.72 0.016 158);
  --line: oklch(0.31 0.018 158);
  --line-strong: oklch(0.47 0.04 158);
  --accent: oklch(0.64 0.13 158);
  --accent-strong: oklch(0.72 0.13 158);
  --accent-soft: oklch(0.225 0.046 158);
  --danger: oklch(0.72 0.14 25);
  --radius-sm: 0.4rem;
  --radius-md: 0.75rem;
  --radius-lg: 1rem;
  --content: 74rem;
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Segoe UI", system-ui, sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }
html { min-width: 20rem; scroll-behavior: smooth; background: var(--bg); }
body { margin: 0; background: var(--bg); color: var(--ink); font-size: 1rem; line-height: 1.65; text-rendering: optimizeLegibility; -webkit-font-smoothing: antialiased; }
a { color: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }
.skip-link { position: fixed; top: 0.75rem; left: 0.75rem; z-index: 20; padding: 0.55rem 0.75rem; border-radius: var(--radius-sm); background: var(--ink); color: var(--bg); text-decoration: none; transform: translateY(-180%); transition: transform 160ms var(--ease-out); }
.skip-link:focus { transform: translateY(0); }

.site-header { position: sticky; top: 0; z-index: 10; border-bottom: 1px solid color-mix(in oklch, var(--line) 78%, transparent); background: color-mix(in oklch, var(--bg) 92%, transparent); backdrop-filter: blur(14px); }
.header-inner { display: flex; width: min(var(--content), calc(100% - 2rem)); min-height: 4.75rem; margin: 0 auto; align-items: center; justify-content: space-between; gap: 2rem; }
.wordmark { display: inline-flex; flex: 0 0 auto; align-items: center; gap: 0.75rem; color: var(--ink); text-decoration: none; }
.wordmark img { width: 2.375rem; height: 2.375rem; border-radius: 0.7rem; }
.wordmark span, .wordmark strong, .wordmark small { display: block; }
.wordmark strong { font-size: 0.95rem; letter-spacing: -0.01em; }
.wordmark small { margin-top: 0.08rem; color: var(--muted); font-size: 0.66rem; letter-spacing: 0.1em; }
.site-navigation { display: flex; flex: 1; align-items: center; justify-content: flex-end; gap: 2.25rem; }
.site-navigation nav, .header-actions { display: flex; align-items: center; gap: 1.4rem; }
.site-navigation nav a, .nav-sign-in { color: var(--muted); font-size: 0.88rem; font-weight: 600; text-decoration: none; transition: color 160ms var(--ease-out); }
.site-navigation nav a:hover, .nav-sign-in:hover { color: var(--ink); }
.menu-toggle { display: none; width: 2.75rem; height: 2.75rem; padding: 0.7rem; border: 1px solid var(--line); border-radius: var(--radius-sm); background: transparent; color: var(--ink); }
.menu-toggle span { display: block; width: 100%; height: 1px; margin: 0.28rem 0; background: currentColor; }

.button { display: inline-flex; min-height: 2.8rem; align-items: center; justify-content: center; padding: 0.65rem 1rem; border: 1px solid var(--accent); border-radius: var(--radius-sm); background: var(--accent); color: oklch(0.13 0.018 158); font-size: 0.9rem; font-weight: 750; line-height: 1; text-decoration: none; white-space: nowrap; transition: background-color 160ms var(--ease-out), border-color 160ms var(--ease-out), color 160ms var(--ease-out), transform 80ms var(--ease-out); }
.button:hover { border-color: var(--accent-strong); background: var(--accent-strong); }
.button:active { transform: translateY(1px); }
.button.secondary { border-color: var(--line-strong); background: transparent; color: var(--ink); }
.button.secondary:hover { border-color: var(--accent); background: var(--accent-soft); }
.button.small { min-height: 2.35rem; padding: 0.55rem 0.8rem; font-size: 0.8rem; }
a:focus-visible, button:focus-visible { outline: 2px solid var(--accent-strong); outline-offset: 3px; }

.hero { --pointer-x: 14%; --pointer-y: 10%; position: relative; min-height: calc(100svh - 4.75rem); overflow: hidden; border-bottom: 1px solid var(--line); background: var(--bg); }
.hero::before { position: absolute; inset: 0; background: radial-gradient(circle 25rem at var(--pointer-x) var(--pointer-y), oklch(0.31 0.075 158 / 0.28), transparent 72%); content: ""; pointer-events: none; transition: opacity 240ms var(--ease-out); }
.hero-inner { display: grid; width: min(var(--content), calc(100% - 2rem)); min-height: calc(100svh - 4.75rem); margin: 0 auto; padding: clamp(4rem, 9vh, 6.75rem) 0; grid-template-columns: minmax(0, 1.15fr) minmax(22rem, 0.85fr); align-items: center; gap: clamp(3rem, 8vw, 7rem); }
.hero-inner { position: relative; z-index: 1; }
.hero-copy { max-width: 43rem; }
.hero-kicker { margin: 0 0 1.2rem; color: var(--accent-strong); font-size: 0.83rem; font-weight: 720; letter-spacing: 0.08em; }
.hero h1 { max-width: 12ch; margin: 0; font-size: clamp(3rem, 6.4vw, 5.5rem); line-height: 1.03; letter-spacing: -0.038em; text-wrap: balance; }
.hero-summary { max-width: 32rem; margin: 1.6rem 0 0; color: var(--muted); font-size: clamp(1.05rem, 1.7vw, 1.25rem); line-height: 1.75; text-wrap: pretty; }
.hero-actions { display: flex; gap: 0.75rem; margin-top: 2rem; }
.trust-list { display: flex; margin: 2rem 0 0; padding: 0; flex-wrap: wrap; gap: 0.65rem 1.7rem; color: var(--muted); font-size: 0.8rem; list-style: none; }
.trust-list li::before { display: inline-block; width: 0.42rem; height: 0.42rem; margin-right: 0.55rem; border-radius: 50%; background: var(--accent); content: ""; vertical-align: 0.08rem; }

.exposure-map { margin: 0; padding: 1.5rem; border: 1px solid var(--line); border-radius: var(--radius-lg); background: var(--surface); }
.exposure-map figcaption { margin-bottom: 1.25rem; color: var(--muted); font-size: 0.78rem; font-weight: 650; }
.map-stage { padding: 1rem; border: 1px solid var(--line); border-radius: var(--radius-sm); background: var(--bg); }
.map-stage > span, .map-output span { display: block; color: var(--muted); font-size: 0.72rem; }
.map-stage strong { display: block; margin-top: 0.25rem; font-size: 1rem; }
.map-connector { display: flex; height: 1.5rem; align-items: center; justify-content: center; }
.map-connector span { width: 1px; height: 100%; background: var(--line-strong); }
.map-identity ul { display: flex; margin: 0.7rem 0 0; padding: 0; flex-wrap: wrap; gap: 0.45rem; list-style: none; }
.map-identity li { padding: 0.3rem 0.55rem; border-radius: var(--radius-sm); background: var(--accent-soft); color: var(--accent-strong); font-size: 0.72rem; font-weight: 650; }
.map-output { display: grid; border: 1px solid var(--line-strong); border-radius: var(--radius-sm); overflow: hidden; }
.map-output div { padding: 0.85rem 1rem; background: var(--surface-strong); }
.map-output div + div { border-top: 1px solid var(--line); }
.map-output strong { display: block; margin-top: 0.12rem; font-size: 0.86rem; }
.map-note { margin: 1rem 0 0; color: var(--muted); font-size: 0.73rem; }

.product-proof, .workflow, .pricing { width: min(var(--content), calc(100% - 2rem)); margin: 0 auto; padding: clamp(5.5rem, 10vw, 8.5rem) 0; }
.section-intro { display: grid; max-width: 58rem; gap: 1.15rem; }
.section-intro.compact { max-width: 42rem; }
.section-intro h2, .security h2, .pricing h2, .final-cta h2 { margin: 0; font-size: clamp(2rem, 4vw, 3.6rem); line-height: 1.12; letter-spacing: -0.032em; text-wrap: balance; }
.section-intro p, .pricing-header p, .security-copy p, .final-cta p { max-width: 65ch; margin: 0; color: var(--muted); text-wrap: pretty; }
.proof-layout { display: grid; margin-top: 4rem; grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr); gap: clamp(3rem, 8vw, 7rem); }
.proof-index { margin: 0; }
.proof-index div { padding: 1.35rem 0; border-top: 1px solid var(--line); }
.proof-index div:last-child { border-bottom: 1px solid var(--line); }
.proof-index dt { color: var(--accent-strong); font-size: 0.78rem; font-weight: 750; }
.proof-index dd { margin: 0.45rem 0 0; color: var(--muted); line-height: 1.7; }
.proof-outcomes { padding: 0.5rem 0 0; }
.proof-outcomes h3 { margin: 0 0 1rem; font-size: 1.1rem; }
.proof-outcomes ul { margin: 0; padding: 0; border-top: 1px solid var(--line-strong); list-style: none; }
.proof-outcomes li { display: grid; padding: 1.05rem 0; border-bottom: 1px solid var(--line); grid-template-columns: 2.4rem minmax(10rem, 0.7fr) minmax(0, 1.3fr); align-items: baseline; gap: 0.7rem; }
.proof-outcomes li > span { color: var(--accent); font-size: 0.72rem; font-weight: 720; }
.proof-outcomes strong { font-size: 0.9rem; }
.proof-outcomes small { color: var(--muted); font-size: 0.8rem; }

.workflow { border-top: 1px solid var(--line); }
.workflow-steps { display: grid; margin: 3.5rem 0 0; padding: 0; grid-template-columns: repeat(3, minmax(0, 1fr)); list-style: none; }
.workflow-steps li { display: flex; min-height: 12rem; padding: 1.4rem 1.8rem; border-top: 1px solid var(--line-strong); border-bottom: 1px solid var(--line-strong); gap: 1.2rem; }
.workflow-steps li + li { border-left: 1px solid var(--line); }
.workflow-steps > li > span { display: grid; width: 2rem; height: 2rem; flex: 0 0 auto; place-items: center; border-radius: 50%; background: var(--accent-soft); color: var(--accent-strong); font-size: 0.78rem; font-weight: 750; }
.workflow-steps h3 { margin: 0.2rem 0 0.6rem; font-size: 1rem; }
.workflow-steps p { margin: 0; color: var(--muted); font-size: 0.87rem; }

.security { display: grid; padding: clamp(5.5rem, 10vw, 8.5rem) max(1rem, calc((100% - var(--content)) / 2)); border-block: 1px solid var(--line); background: var(--surface); grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr); gap: clamp(3rem, 9vw, 8rem); }
.security-copy { align-self: center; }
.security-copy p { margin-top: 1.4rem; }
.security-copy a { display: inline-block; margin-top: 1.3rem; color: var(--accent-strong); font-size: 0.85rem; font-weight: 650; text-underline-offset: 0.24rem; }
.security-facts { margin: 0; border-top: 1px solid var(--line-strong); }
.security-facts div { display: grid; padding: 1.2rem 0; border-bottom: 1px solid var(--line); grid-template-columns: 5rem 1fr; gap: 1rem; }
.security-facts dt { color: var(--muted); font-size: 0.77rem; }
.security-facts dd { margin: 0; font-size: 0.9rem; font-weight: 620; }

.pricing-header { display: flex; align-items: end; justify-content: space-between; gap: 4rem; }
.pricing-header > div { max-width: 42rem; }
.pricing-header p { margin-top: 1.1rem; }
.pricing-header ul { min-width: 15rem; margin: 0; padding: 0; color: var(--muted); font-size: 0.78rem; list-style: none; }
.pricing-header li { padding: 0.25rem 0; }
.pricing-header li::before { margin-right: 0.5rem; color: var(--accent); content: "✓"; }
.price-table { margin-top: 3.5rem; border-top: 1px solid var(--line-strong); }
.price-row { display: grid; min-height: 6.6rem; padding: 1rem 0; border-bottom: 1px solid var(--line); grid-template-columns: 1.1fr 1fr auto; align-items: center; gap: 2rem; }
.price-row.preferred { background: linear-gradient(90deg, var(--accent-soft), transparent 80%); }
.price-row > div:first-child, .price-row > div:nth-child(2) { display: flex; flex-direction: column; }
.price-row strong { font-size: 1rem; }
.price-row b { font-size: 1.3rem; letter-spacing: -0.02em; }
.price-row span { color: var(--muted); font-size: 0.78rem; }
.pricing-note { margin: 1rem 0 0; color: var(--muted); font-size: 0.75rem; }

.final-cta { display: flex; width: min(var(--content), calc(100% - 2rem)); margin: 0 auto 5rem; padding: 3rem; align-items: center; justify-content: space-between; gap: 3rem; border: 1px solid var(--line-strong); border-radius: var(--radius-lg); background: var(--surface); }
.final-cta h2 { font-size: clamp(1.8rem, 3vw, 2.8rem); }
.final-cta p { margin-top: 0.7rem; }
.site-footer { display: grid; width: min(var(--content), calc(100% - 2rem)); margin: 0 auto; padding: 2rem 0 3rem; border-top: 1px solid var(--line); grid-template-columns: auto 1fr auto auto; align-items: center; gap: 1.5rem; color: var(--muted); font-size: 0.72rem; }
.site-footer p { margin: 0; }
.footer-brand { color: var(--ink); font-weight: 720; text-decoration: none; }
.site-footer nav { display: flex; gap: 1rem; }
.site-footer nav a { text-decoration: none; }
.site-footer nav a:hover { color: var(--ink); }

.reveal-ready { opacity: 0; transform: translateY(1.25rem); transition: opacity 620ms var(--ease-out), transform 620ms var(--ease-out); }
.reveal-ready.is-visible { opacity: 1; transform: translateY(0); }
.workflow-steps li { transition: border-color 180ms var(--ease-out), background-color 180ms var(--ease-out); }
.workflow-steps li:hover { border-color: var(--line-strong); background: color-mix(in oklch, var(--accent-soft) 32%, transparent); }

@media (max-width: 900px) {
  .menu-toggle { display: block; }
  .site-navigation { position: absolute; top: calc(100% + 1px); right: 0; left: 0; display: none; padding: 1rem; border-bottom: 1px solid var(--line); background: var(--surface); }
  .site-navigation.open { display: grid; gap: 1rem; }
  .site-navigation nav, .header-actions { align-items: stretch; flex-direction: column; gap: 0.2rem; }
  .site-navigation nav a, .nav-sign-in { padding: 0.7rem; }
  .header-actions .button { width: 100%; }
  .hero, .hero-inner { min-height: auto; }
  .hero-inner { grid-template-columns: 1fr; }
  .exposure-map { max-width: 36rem; }
  .proof-layout, .security { grid-template-columns: 1fr; }
  .proof-outcomes li { grid-template-columns: 2rem minmax(0, 1fr); }
  .proof-outcomes small { grid-column: 2; }
  .pricing-header { align-items: start; flex-direction: column; gap: 1.5rem; }
  .site-footer { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 680px) {
  .header-inner { min-height: 4.25rem; }
  .hero-inner { padding: 4rem 0; }
  .hero h1 { font-size: clamp(2.6rem, 13vw, 4rem); }
  .hero-actions { align-items: stretch; flex-direction: column; }
  .trust-list { display: grid; }
  .product-proof, .workflow, .pricing { padding: 4.8rem 0; }
  .workflow-steps { grid-template-columns: 1fr; }
  .workflow-steps li { min-height: 0; padding-inline: 0; }
  .workflow-steps li + li { border-left: 0; border-top: 0; }
  .security { padding-block: 4.8rem; }
  .price-row { padding: 1.25rem 0; grid-template-columns: 1fr auto; gap: 1rem; }
  .price-row > div:nth-child(2) { align-items: end; }
  .price-row > div:last-child { grid-column: 1 / -1; }
  .price-row .button { width: 100%; }
  .final-cta { align-items: stretch; flex-direction: column; padding: 2rem; }
  .final-cta .button { width: 100%; }
  .site-footer { grid-template-columns: 1fr; }
  .site-footer nav { flex-wrap: wrap; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: 0.01ms !important; }
  .reveal-ready { opacity: 1; transform: none; }
}