:root {
  color-scheme: dark;
  --bg: #111411;
  --bg-elevated: #171b18;
  --panel: #202621;
  --panel-soft: #252b27;
  --ink: #fffaf1;
  --ink-muted: #cfc6b6;
  --line: rgba(255, 250, 241, 0.16);
  --line-strong: rgba(255, 250, 241, 0.26);
  --green: #58cf86;
  --amber: #f0b94b;
  --blue: #80b8ff;
  --coral: #e86f78;
  --shadow: 0 18px 52px rgba(0, 0, 0, 0.22);
}

:root[data-theme="light"] {
  color-scheme: light;
  --bg: #f5f2ec;
  --bg-elevated: #ffffff;
  --panel: #ffffff;
  --panel-soft: #f2eee6;
  --ink: #1c201b;
  --ink-muted: #5b5e57;
  --line: rgba(33, 31, 26, 0.15);
  --line-strong: rgba(33, 31, 26, 0.24);
  --shadow: 0 16px 42px rgba(58, 48, 27, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  background: var(--bg);
  color: var(--ink);
  font-family: Inter, "Noto Sans SC", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
  line-height: 1.65;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

img,
video {
  display: block;
  max-width: 100%;
}

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

button {
  font: inherit;
}

.skip-link {
  position: fixed;
  top: -80px;
  left: 16px;
  z-index: 40;
  padding: 10px 14px;
  border-radius: 8px;
  background: var(--green);
  color: #101410;
  font-weight: 800;
  transition: top 160ms ease;
}

.skip-link:focus {
  top: 16px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 68px;
  padding: 0 42px;
  border-bottom: 1px solid var(--line);
  background: color-mix(in srgb, var(--bg) 92%, transparent);
  backdrop-filter: blur(18px);
}

.site-logo {
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 22px;
  font-weight: 900;
  line-height: 1;
}

.site-logo__icon {
  height: 32px;
  width: 32px;
  border-radius: 6px;
}

.site-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
}

.site-nav a {
  min-height: 38px;
  padding: 7px 11px;
  border-radius: 8px;
  color: var(--ink-muted);
  font-size: 14px;
  font-weight: 800;
}

.site-nav a:hover,
.site-nav a:focus-visible {
  background: color-mix(in srgb, var(--panel-soft) 72%, transparent);
  color: var(--ink);
  outline: none;
}

.theme-toggle {
  display: inline-grid;
  place-items: center;
  flex: 0 0 auto;
  width: 40px;
  height: 40px;
  margin-left: 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: transparent;
  color: var(--ink);
  cursor: pointer;
}

.theme-toggle:hover,
.theme-toggle:focus-visible {
  border-color: var(--green);
  outline: none;
}

.theme-toggle__mark {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: linear-gradient(90deg, var(--amber) 0 50%, var(--blue) 50% 100%);
  box-shadow: inset 0 0 0 2px rgba(0, 0, 0, 0.11);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(360px, 0.78fr);
  gap: 44px;
  align-items: center;
  max-width: 1180px;
  margin: 0 auto;
  padding: 58px 28px 42px;
}

.hero > *,
.section > *,
.demo-card,
.pipeline-card,
.safety-card,
.comparison-card,
.value-card {
  min-width: 0;
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--amber);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0;
  text-transform: uppercase;
}

.hero h1 {
  margin: 0;
  font-size: 78px;
  line-height: 0.94;
  font-weight: 900;
}

.hero__tagline {
  max-width: 760px;
  margin: 18px 0 0;
  color: var(--green);
  font-size: 30px;
  font-weight: 900;
  line-height: 1.25;
}

.hero__lead {
  max-width: 760px;
  margin: 20px 0 0;
  color: var(--ink-muted);
  font-size: 18px;
}

.hero__actions,
.cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 26px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 0;
  min-height: 42px;
  padding: 9px 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--ink);
  font-weight: 850;
  text-align: center;
  overflow-wrap: anywhere;
  word-break: normal;
}

.button:hover,
.button:focus-visible {
  border-color: var(--green);
  outline: none;
}

.button--primary {
  border-color: transparent;
  background: var(--green);
  color: #0e140f;
}

.button--ghost {
  color: var(--ink-muted);
}

.proof-strip {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  margin-top: 28px;
}

.proof-item {
  min-height: 116px;
  padding: 15px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: color-mix(in srgb, var(--panel) 72%, transparent);
}

.proof-item strong,
.proof-item span {
  display: block;
}

.proof-item strong {
  color: var(--ink);
  font-size: 16px;
  line-height: 1.35;
}

.proof-item span {
  margin-top: 8px;
  color: var(--ink-muted);
  font-size: 13px;
  line-height: 1.45;
}

.mobile-anchor-bar {
  display: none;
}

.idle-trace {
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  background: color-mix(in srgb, var(--panel) 86%, transparent);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.trace-window__top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 18px;
  padding: 18px 18px 16px;
  border-bottom: 1px solid var(--line);
}

.trace-window__top .eyebrow {
  margin: 0;
  line-height: 1.5;
}

.trace-window__top span {
  flex: 0 0 auto;
  min-height: 28px;
  padding: 4px 9px;
  border: 1px solid color-mix(in srgb, var(--green) 52%, transparent);
  border-radius: 8px;
  color: var(--green);
  font-size: 12px;
  font-weight: 900;
  text-transform: uppercase;
}

.trace-row {
  display: grid;
  grid-template-columns: 108px minmax(0, 1fr);
  gap: 14px;
  padding: 15px 18px;
  border-bottom: 1px solid var(--line);
}

.trace-row:last-child {
  border-bottom: 0;
}

.trace-row__label {
  color: var(--blue);
  font-size: 13px;
  font-weight: 900;
}

.trace-row p {
  min-width: 0;
  margin: 0;
  color: var(--ink-muted);
  font-size: 14px;
  line-height: 1.65;
  overflow-wrap: anywhere;
  word-break: normal;
}

.trace-row--decision {
  background: color-mix(in srgb, var(--green) 9%, transparent);
}

.section {
  max-width: 1180px;
  margin: 0 auto;
  padding: 66px 28px;
}

.section--demo {
  padding-top: 54px;
}

.section--soft,
.section--dark {
  max-width: none;
}

.section--soft {
  background:
    linear-gradient(
      180deg,
      color-mix(in srgb, var(--bg-elevated) 78%, var(--green) 4%),
      color-mix(in srgb, var(--bg-elevated) 92%, transparent)
    );
}

.section--dark {
  background: var(--bg-elevated);
}

.section--soft > *,
.section--dark > * {
  max-width: 1124px;
  margin-left: auto;
  margin-right: auto;
}

.section__header {
  margin-bottom: 28px;
}

.section__header h2 {
  margin: 0;
  font-size: 38px;
  line-height: 1.18;
  overflow-wrap: anywhere;
  word-break: normal;
}

.section__header p:not(.eyebrow) {
  max-width: 880px;
  margin: 14px 0 0;
  color: var(--ink-muted);
  font-size: 17px;
}

.section--soft .section__header p:not(.eyebrow) {
  color: var(--ink-muted);
}

.demo-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.demo-card {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: color-mix(in srgb, var(--panel) 78%, transparent);
}

.demo-card__header {
  display: grid;
  gap: 12px;
  padding: 20px 20px 17px;
}

.card-kicker {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
}

.card-kicker span {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  font-size: 12px;
  font-weight: 900;
  line-height: 1.2;
}

.card-kicker span:first-child {
  color: var(--amber);
  text-transform: uppercase;
}

.card-kicker span:last-child {
  padding: 5px 8px;
  border-radius: 8px;
  background: color-mix(in srgb, var(--green) 18%, transparent);
  color: var(--green);
}

.demo-card h3 {
  margin: 0;
  color: var(--ink);
  font-size: 23px;
  line-height: 1.22;
  overflow-wrap: anywhere;
  word-break: normal;
}

.demo-card__header p {
  margin: 0;
  color: var(--ink-muted);
  font-size: 15px;
  line-height: 1.55;
}

.video-shell {
  aspect-ratio: 16 / 10;
  background: #0d100d;
}

.video-shell video {
  width: 100%;
  height: 100%;
  object-fit: contain;
  background: #0d100d;
}

.demo-facts {
  display: grid;
  gap: 0;
  margin: 0;
  padding: 18px 20px 0;
}

.demo-facts div {
  display: grid;
  gap: 5px;
  padding: 12px 0;
  border-top: 1px solid var(--line);
}

.demo-facts div:first-child {
  padding-top: 0;
  border-top: 0;
}

.demo-facts dt {
  color: var(--blue);
  font-size: 12px;
  font-weight: 900;
}

.demo-facts dd {
  margin: 0;
  color: var(--ink-muted);
  font-size: 14px;
}

.behavior-chain {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  margin: auto 0 0;
  padding: 16px 20px 20px;
  list-style: none;
}

.behavior-chain li {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  padding: 5px 8px;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--ink-muted);
  font-size: 12px;
  font-weight: 800;
}

.value-grid,
.comparison-grid,
.safety-grid,
.evaluation-grid {
  display: grid;
  gap: 18px;
}

.value-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.value-card,
.evaluation-grid article {
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: color-mix(in srgb, var(--panel) 82%, transparent);
}

.value-card h3,
.evaluation-grid h3 {
  margin: 0;
  color: var(--ink);
  font-size: 21px;
  line-height: 1.3;
}

.value-card p,
.evaluation-grid p {
  margin: 12px 0 0;
  color: var(--ink-muted);
}

.comparison-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.comparison-card,
.pipeline-card,
.safety-card {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: color-mix(in srgb, var(--panel) 78%, transparent);
}

.comparison-card {
  display: flex;
  min-height: 246px;
  flex-direction: column;
  padding: 24px;
}

.comparison-card--highlight {
  border-color: color-mix(in srgb, var(--green) 52%, transparent);
  background: color-mix(in srgb, var(--green) 10%, var(--panel));
}

.comparison-card h3,
.pipeline-card h3,
.safety-card h3 {
  margin: 0;
  color: var(--ink);
  line-height: 1.3;
}

.comparison-card h3 {
  font-size: 23px;
}

.comparison-card p,
.pipeline-card p,
.safety-card p {
  margin: 13px 0 0;
  color: var(--ink-muted);
}

.comparison-card span {
  display: block;
  margin-top: auto;
  padding-top: 18px;
  color: var(--blue);
  font-size: 13px;
  font-weight: 900;
}

.pipeline-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 14px;
}

.pipeline-card {
  min-height: 292px;
  padding: 20px;
}

.pipeline-card span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--green);
  font-weight: 900;
}

.pipeline-card h3 {
  margin-top: 18px;
  font-size: 19px;
}

.pipeline-card small {
  display: block;
  margin-top: 5px;
  color: var(--blue);
  font-size: 12px;
  font-weight: 850;
  overflow-wrap: anywhere;
  word-break: normal;
}

.pipeline-card p {
  font-size: 14px;
}

.delivery-band {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin-top: 18px;
}

.delivery-band div {
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: color-mix(in srgb, var(--panel-soft) 82%, transparent);
}

.delivery-band strong {
  color: var(--green);
  font-size: 18px;
}

.delivery-band p {
  margin: 8px 0 0;
  color: var(--ink-muted);
  font-size: 14px;
}

.safety-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.safety-card {
  min-height: 214px;
  padding: 22px;
}

.safety-card h3 {
  font-size: 20px;
}

.safety-note {
  margin: 18px 0 0;
  padding: 14px 16px;
  border: 1px solid color-mix(in srgb, var(--amber) 45%, transparent);
  border-radius: 8px;
  color: var(--ink-muted);
  background: color-mix(in srgb, var(--amber) 8%, transparent);
}

.evaluation-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.faq-list {
  display: grid;
  gap: 12px;
}

.faq-list details {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: color-mix(in srgb, var(--panel) 78%, transparent);
}

.faq-list summary {
  cursor: pointer;
  padding: 18px 20px;
  color: var(--ink);
  font-weight: 850;
}

.faq-list p {
  margin: 0;
  padding: 0 20px 20px;
  color: var(--ink-muted);
}

.section--cta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  border-top: 1px solid var(--line);
}

.section--cta h2 {
  margin: 0;
  font-size: 34px;
  line-height: 1.2;
  overflow-wrap: anywhere;
  word-break: normal;
}

.section--cta p:not(.eyebrow) {
  max-width: 680px;
  margin: 14px 0 0;
  color: var(--ink-muted);
}

.site-footer {
  border-top: 1px solid var(--line);
  padding: 24px 28px;
  color: var(--ink-muted);
  text-align: center;
}

.site-footer p {
  margin: 0;
}

@media (max-width: 1120px) {
  .site-header {
    padding: 0 24px;
  }

  .pipeline-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .safety-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 960px) {
  .site-nav {
    display: none;
  }

  .hero {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .hero h1 {
    font-size: 62px;
  }

  .hero__tagline {
    font-size: 28px;
  }

  .idle-trace {
    max-width: 760px;
  }

  .demo-grid,
  .value-grid,
  .comparison-grid,
  .evaluation-grid {
    grid-template-columns: 1fr;
  }

  .pipeline-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .section--cta {
    display: block;
  }
}

@media (max-width: 680px) {
  .site-header,
  .hero,
  .section,
  .site-footer {
    width: 100%;
    max-width: 100%;
  }

  .site-header {
    min-height: 62px;
    padding: 0 18px;
  }

  .theme-toggle {
    width: 38px;
    height: 38px;
  }

  .hero,
  .section {
    padding-left: 18px;
    padding-right: 18px;
  }

  .hero {
    padding-top: 26px;
    padding-bottom: 8px;
  }

  .eyebrow {
    font-size: 11px;
    line-height: 1.4;
  }

  .hero h1 {
    font-size: 48px;
  }

  .hero__tagline {
    margin-top: 12px;
    font-size: 25px;
    overflow-wrap: anywhere;
    word-break: normal;
  }

  .hero__lead {
    margin-top: 14px;
    font-size: 15px;
    line-height: 1.72;
  }

  .hero__actions,
  .cta-actions {
    display: grid;
    grid-template-columns: 1fr;
    gap: 9px;
    margin-top: 18px;
  }

  .hero__actions {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    max-width: 100%;
  }

  .hero__actions .button--primary {
    grid-column: 1 / -1;
  }

  .button {
    width: 100%;
    min-height: 42px;
  }

  .proof-strip {
    display: flex;
    gap: 8px;
    margin-top: 8px;
    max-width: 100%;
    overflow-x: auto;
    padding-bottom: 4px;
    scroll-snap-type: x proximity;
  }

  .proof-item {
    flex: 0 0 min(78vw, 280px);
    min-height: 38px;
    padding: 6px 10px;
    scroll-snap-align: start;
  }

  .proof-item strong {
    font-size: 14px;
  }

  .proof-item span {
    display: none;
  }

  .mobile-anchor-bar {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 7px;
    margin-top: 10px;
    max-width: 100%;
  }

  .mobile-anchor-bar a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 0;
    min-height: 32px;
    border: 1px solid var(--line);
    border-radius: 8px;
    color: var(--ink-muted);
    font-size: 12px;
    font-weight: 850;
  }

  .idle-trace {
    margin-top: 8px;
  }

  .trace-window__top {
    padding: 8px 12px 7px;
  }

  .trace-window__top span {
    min-height: 25px;
    padding: 3px 7px;
    font-size: 11px;
  }

  .trace-row {
    grid-template-columns: 86px minmax(0, 1fr);
    gap: 8px;
    padding: 6px 12px;
  }

  .trace-row p {
    font-size: 12px;
    line-height: 1.38;
  }

  .trace-row__label {
    font-size: 11.5px;
  }

  .section {
    padding-top: 54px;
    padding-bottom: 54px;
  }

  .section--demo {
    padding-top: 16px;
  }

  .section__header {
    margin-bottom: 20px;
  }

  .section__header h2,
  .section--cta h2 {
    font-size: 26px;
    overflow-wrap: anywhere;
    word-break: normal;
  }

  .section__header p:not(.eyebrow),
  .section--cta p:not(.eyebrow) {
    font-size: 15px;
    line-height: 1.72;
  }

  .demo-card__header {
    gap: 10px;
    padding: 16px 16px 14px;
  }

  .demo-card h3 {
    font-size: 21px;
  }

  .demo-card__header p {
    font-size: 14px;
  }

  .video-shell {
    aspect-ratio: 16 / 11;
  }

  .demo-facts {
    padding: 16px 16px 0;
  }

  .demo-facts dd {
    font-size: 13px;
  }

  .behavior-chain {
    display: grid;
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 5px;
    padding: 14px 16px 16px;
  }

  .behavior-chain li {
    justify-content: center;
    padding: 4px 5px;
    font-size: 11px;
  }

  .value-card,
  .comparison-card,
  .pipeline-card,
  .safety-card,
  .evaluation-grid article {
    min-height: auto;
    padding: 18px;
  }

  .pipeline-grid,
  .safety-grid,
  .delivery-band {
    grid-template-columns: 1fr;
  }

  .pipeline-card h3 small {
    line-height: 1.45;
  }

  .comparison-card span {
    margin-top: 14px;
    padding-top: 0;
  }

  .faq-list summary {
    padding: 16px;
  }

  .faq-list p {
    padding: 0 16px 16px;
  }
}

@media (max-width: 420px) {
  .hero h1 {
    font-size: 44px;
  }

  .hero__tagline {
    font-size: 23px;
  }

  .hero__lead {
    font-size: 13.5px;
    line-height: 1.62;
  }

  .proof-item {
    flex-basis: 260px;
  }

  .section__header h2,
  .section--cta h2 {
    font-size: 25px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}