:root {
  --landing-bg-dark: #17191B;
  --landing-bg-dark-raised: #202326;
  --landing-bg-light: #F5F2EC;
  --landing-surface-light: #FFFDF8;
  --landing-text-on-dark: #F7F0E5;
  --landing-text-on-light: #252421;
  --landing-text-muted-dark: #AAA49A;
  --landing-text-muted-light: #716C63;
  --landing-primary: #E8AD52;
  --landing-primary-hover: #F0BC69;
  --landing-primary-active: #D99A3F;
  --landing-border-dark: rgba(255,255,255,0.13);
  --landing-border-light: #DED8CE;
  --landing-success: #2F9E78;
  --landing-warning: #D9902F;
  --landing-error: #D75B57;
  font-family: Inter, "PingFang SC", "Microsoft YaHei", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--landing-bg-dark); color: var(--landing-text-on-dark); }
a { color: inherit; text-decoration: none; }

.landing-nav {
  position: fixed;
  z-index: 10;
  top: 20px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  gap: 20px;
  width: min(1160px, calc(100% - 32px));
  padding: 10px 12px 10px 20px;
  border: 1px solid var(--landing-border-dark);
  border-radius: 999px;
  background: rgba(23,25,27,.9);
  backdrop-filter: blur(16px);
}
.landing-brand { margin-right: auto; font-weight: 700; letter-spacing: -.02em; }
.landing-links { display: flex; gap: 16px; color: var(--landing-text-muted-dark); font-size: 14px; }
.landing-links a,
.landing-info,
.footer-nav a { display: inline-flex; min-height: 44px; align-items: center; }
.landing-links a:hover,
.landing-info:hover,
.footer-nav a:hover { color: var(--landing-primary); }
.landing-links a:active,
.landing-info:active,
.footer-nav a:active { color: var(--landing-primary-active); }
.landing-menu-toggle {
  display: none;
  min-width: 44px;
  min-height: 44px;
  border: 1px solid var(--landing-border-dark);
  border-radius: 999px;
  background: transparent;
  color: var(--landing-text-on-dark);
}
.landing-button,
.landing-menu-toggle,
.landing-links a,
.landing-info,
.footer-nav a {
  transition: color .18s ease, background-color .18s ease, border-color .18s ease, opacity .18s ease, transform .18s ease;
}
.landing-button:focus-visible { outline: 3px solid var(--landing-primary); outline-offset: 3px; }
.light .landing-button:focus-visible { outline-color: var(--landing-bg-dark); }
.landing-menu-toggle:focus-visible,
.landing-links a:focus-visible,
.landing-info:focus-visible,
.landing-footer a:focus-visible {
  outline: 3px solid var(--landing-primary);
  outline-offset: 3px;
}

.landing-section { padding: 120px max(24px, calc((100% - 1120px) / 2)); }
.landing-section.light { background: var(--landing-bg-light); color: var(--landing-text-on-light); }
.landing-section > *,
.landing-hero > *,
.split > *,
.personal-bot-layout > * { min-width: 0; }
.landing-hero {
  min-height: 92vh;
  display: grid;
  align-items: center;
  grid-template-columns: minmax(0, 1.35fr) minmax(280px, .65fr);
  gap: 48px;
  padding-top: 150px;
  background: radial-gradient(circle at 82% 18%, rgba(232,173,82,.18), transparent 28%), var(--landing-bg-dark);
}
.eyebrow { color: var(--landing-primary); font-size: 13px; font-weight: 700; letter-spacing: .12em; text-transform: uppercase; }
h1, h2, h3, p { margin-top: 0; }
h1 {
  max-width: 760px;
  margin: 18px 0 24px;
  font-size: clamp(46px, 3.8vw, 56px);
  line-height: 1.03;
  letter-spacing: -.055em;
  white-space: pre-line;
}
h2 { font-size: clamp(32px, 5vw, 56px); line-height: 1.04; letter-spacing: -.045em; }
.personal-bot-content h2 { text-wrap: balance; }
h3 { font-size: 19px; margin-bottom: 10px; }
.lead { max-width: 610px; color: var(--landing-text-muted-dark); font-size: 19px; line-height: 1.7; }
.light .lead, .light .muted { color: var(--landing-text-muted-light); }
.landing-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 34px; }
.landing-button {
  display: inline-flex;
  min-height: 46px;
  align-items: center;
  justify-content: center;
  padding: 0 22px;
  border: 1px solid transparent;
  border-radius: 999px;
  background: var(--landing-primary);
  color: #24211C;
  font-weight: 800;
}
.landing-button:hover { background: var(--landing-primary-hover); transform: translateY(-1px); }
.landing-button:active { background: var(--landing-primary-active); transform: translateY(0); }
.landing-button:disabled { cursor: not-allowed; opacity: .55; transform: none; }
.landing-button.secondary { border-color: var(--landing-border-dark); background: transparent; color: var(--landing-text-on-dark); }
.light .landing-button.secondary { color: var(--landing-text-on-light); border-color: #777268; }

.landing-preview {
  min-height: 390px;
  padding: 24px;
  border: 1px solid var(--landing-border-dark);
  border-radius: 24px;
  background: linear-gradient(145deg, #2D3134, #1C1F21);
  box-shadow: 0 24px 60px rgba(18,16,13,.22);
  transform: perspective(900px) rotateY(-4deg) rotateX(2deg);
}
.preview-top, .preview-row { display: flex; align-items: center; gap: 12px; padding: 14px; border-bottom: 1px solid var(--landing-border-dark); }
.preview-dot { width: 10px; height: 10px; border-radius: 50%; background: var(--landing-primary); }
.preview-card { margin-top: 18px; padding: 20px; border: 1px solid var(--landing-border-dark); border-radius: 18px; background: rgba(255,255,255,.04); }
.preview-card strong { display: block; margin-bottom: 8px; }

.split { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 70px; align-items: center; }
#capabilities .split { grid-template-columns: minmax(0, .82fr) minmax(0, 1.18fr); gap: 48px; }
.card-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; align-items: stretch; }
.landing-card { padding: 22px; border: 1px solid var(--landing-border-light); border-radius: 14px; background: var(--landing-surface-light); box-shadow: 0 14px 36px rgba(31,25,18,.08); }
#capabilities .landing-card { height: 100%; }
.landing-card p:last-child { margin-bottom: 0; }
.flow-grid, .step-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
.flow-card, .dark-card { padding: 26px; border: 1px solid var(--landing-border-dark); border-radius: 18px; background: var(--landing-bg-dark-raised); }
.flow-number { color: var(--landing-primary); font-weight: 800; }
.dark-panel { padding: 38px; border-radius: 24px; background: var(--landing-bg-dark-raised); }
.state-list { display: grid; gap: 10px; margin: 24px 0 0; padding: 0; list-style: none; }
.state-list li { padding: 13px 15px; border-left: 3px solid var(--landing-primary); background: rgba(255,255,255,.04); }
.step-grid { grid-template-columns: repeat(5, minmax(0, 1fr)); }
.step-card { padding: 18px; border: 1px solid var(--landing-border-dark); border-radius: 14px; background: rgba(255,255,255,.03); }
.step-card span { display: block; color: var(--landing-primary); font-weight: 800; margin-bottom: 16px; }
.matrix { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; }
.matrix article { padding: 20px; border-top: 2px solid var(--landing-primary); background: var(--landing-surface-light); color: var(--landing-text-on-light); }
.risk-alert-section { background: linear-gradient(135deg, #17191B 0%, #202326 100%); }
.risk-alert-layout { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(300px, .9fr); gap: clamp(40px, 7vw, 84px); align-items: center; }
.risk-alert-copy h2 { max-width: 680px; margin-bottom: 22px; }
.risk-alert-copy .lead { max-width: 700px; }
.risk-alert-tags { display: flex; flex-wrap: wrap; gap: 10px; margin: 28px 0 0; padding: 0; list-style: none; }
.risk-alert-tags li { padding: 10px 14px; border: 1px solid rgba(232,173,82,.42); border-radius: 999px; color: var(--landing-primary); background: rgba(232,173,82,.08); font-size: 14px; font-weight: 700; }
.risk-alert-note { margin: 24px 0 0; padding-left: 16px; border-left: 3px solid var(--landing-warning); color: var(--landing-text-on-dark); line-height: 1.6; }
.risk-alert-demo { padding: 26px; border: 1px solid rgba(232,173,82,.34); border-radius: 24px; background: linear-gradient(145deg, #2D3134, #1C1F21); box-shadow: 0 24px 56px rgba(18,16,13,.2); }
.risk-alert-demo-header { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding-bottom: 18px; border-bottom: 1px solid var(--landing-border-dark); }
.risk-alert-demo-header strong { color: var(--landing-text-on-dark); font-size: 18px; }
.risk-alert-demo-header span { padding: 7px 10px; border-radius: 999px; color: #2A2114; background: var(--landing-primary); font-size: 12px; font-weight: 800; white-space: nowrap; }
.risk-alert-demo-body { display: grid; gap: 12px; margin-top: 18px; }
.risk-alert-demo-body div { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 16px; align-items: center; padding: 14px; border: 1px solid var(--landing-border-dark); border-radius: 12px; background: rgba(255,255,255,.04); }
.risk-alert-demo-body dt { color: var(--landing-text-muted-dark); font-size: 13px; }
.risk-alert-demo-body dd { margin: 0; color: var(--landing-text-on-dark); font-weight: 700; text-align: right; }
.risk-alert-demo-body div:nth-child(2) dd { color: var(--landing-primary); }
.list-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; padding: 0; list-style: none; }
.list-grid li { padding: 20px; border: 1px solid var(--landing-border-light); border-radius: 14px; background: var(--landing-surface-light); }
#advantages .list-grid li { color: var(--landing-text-on-light); }

.personal-bot-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr);
  gap: clamp(40px, 6vw, 72px);
  align-items: center;
  margin-top: 28px;
}
.personal-bot-features {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin: 30px 0;
  padding: 0;
  list-style: none;
}
.personal-bot-features li { min-height: 100%; padding: 18px; border: 1px solid var(--landing-border-light); border-radius: 14px; background: var(--landing-surface-light); }
.personal-bot-features p:last-child { margin-bottom: 0; }
.personal-bot-privacy { margin-bottom: 0; padding: 18px 20px; border-left: 3px solid var(--landing-primary); background: rgba(232,173,82,.11); color: var(--landing-text-on-light); line-height: 1.65; }
.personal-bot-demo {
  padding: 26px;
  border: 1px solid var(--landing-border-dark);
  border-radius: 24px;
  background: linear-gradient(145deg, #2D3134, var(--landing-bg-dark-raised));
  color: var(--landing-text-on-dark);
  box-shadow: 0 24px 56px rgba(18,16,13,.2);
  transform: perspective(1000px) rotateY(-3deg) rotateX(1deg);
}
.personal-bot-demo-label { display: block; margin-bottom: 18px; color: var(--landing-primary); font-size: 13px; letter-spacing: .1em; text-transform: uppercase; }
.personal-bot-statuses,
.personal-bot-metrics { margin: 0; }
.personal-bot-statuses { display: grid; gap: 10px; }
.personal-bot-statuses div { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 16px; align-items: center; padding: 13px 14px; border: 1px solid var(--landing-border-dark); border-radius: 12px; background: rgba(255,255,255,.04); }
.personal-bot-statuses dt,
.personal-bot-metrics dt { color: var(--landing-text-muted-dark); }
.personal-bot-statuses dd,
.personal-bot-metrics dd { margin: 0; color: var(--landing-text-on-dark); font-weight: 700; }
.personal-bot-statuses dd { color: var(--landing-primary); }
.personal-bot-metrics { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; margin-top: 16px; }
.personal-bot-metrics div { padding: 14px; border-radius: 12px; background: rgba(255,255,255,.06); }
.personal-bot-metrics dt { min-height: 2.8em; color: #B0AAA0; font-size: 13px; line-height: 1.4; }
.personal-bot-metrics dd { margin-top: 8px; font-size: 24px; }

.comparison-panel { margin-top: 54px; border: 1px solid var(--landing-border-dark); border-radius: 22px; background: var(--landing-bg-dark-raised); }
.comparison-table { width: 100%; table-layout: fixed; border-collapse: collapse; overflow-wrap: anywhere; }
.comparison-table caption { padding: 28px 24px 22px; color: var(--landing-text-on-dark); font-size: clamp(24px, 3vw, 36px); font-weight: 800; line-height: 1.2; text-align: left; }
.comparison-table th,
.comparison-table td { padding: 18px 20px; border-top: 1px solid var(--landing-border-dark); line-height: 1.55; text-align: left; vertical-align: top; }
.comparison-table thead th { color: var(--landing-text-on-dark); font-size: 14px; }
.comparison-table thead th:first-child,
.comparison-table tbody th { width: 18%; }
.comparison-table tbody th { color: var(--landing-text-on-dark); }
.comparison-table th:nth-child(2),
.comparison-table td:nth-child(2) { color: var(--landing-text-muted-dark); }
.comparison-table th:nth-child(3),
.comparison-table td:nth-child(3) { color: var(--landing-primary); }
.comparison-table tbody tr:nth-child(odd) { background: rgba(255,255,255,.025); }

.safety-list { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; padding: 0; list-style: none; }
.safety-list li { padding: 15px; border: 1px solid var(--landing-border-dark); border-radius: 12px; color: var(--landing-text-muted-dark); }
.final-cta { text-align: center; }
.final-cta .lead { margin: 0 auto; }
.landing-actions-centered { justify-content: center; width: 100%; }
.landing-footer {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 40px;
  align-items: start;
  padding: 42px max(24px, calc((100% - 1120px) / 2));
  border-top: 1px solid var(--landing-border-dark);
  color: var(--landing-text-muted-dark);
}
.footer-nav { display: flex; flex-wrap: wrap; gap: 8px 18px; margin-top: 8px; font-size: 14px; }
.footer-boundary { max-width: 440px; justify-self: end; color: var(--landing-text-muted-dark); }
.footer-boundary p { margin: 8px 0 0; line-height: 1.6; }

@media (max-width: 1024px) {
  .landing-nav { gap: 12px; }
  .landing-links { gap: 12px; }
  .landing-section { padding-left: 24px; padding-right: 24px; }
  .landing-hero { grid-template-columns: minmax(0, 1.35fr) minmax(260px, .65fr); gap: 36px; }
  #capabilities .split { gap: 32px; }
  .personal-bot-layout { gap: 34px; }
  .personal-bot-demo { transform: none; box-shadow: 0 16px 36px rgba(18,16,13,.14); }
  .comparison-table th,
  .comparison-table td { padding: 16px; }
}

@media (max-width: 900px) {
  .landing-links { display: none; }
  .landing-hero,
  .split { grid-template-columns: 1fr; gap: 38px; }
  .landing-preview { min-height: 260px; transform: none; }
  .matrix { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .risk-alert-layout { grid-template-columns: 1fr; gap: 34px; }
  .step-grid { grid-template-columns: 1fr; }
}

@media (max-width: 560px) {
  .landing-nav { top: 10px; width: calc(100% - 20px); gap: 8px; }
  .landing-menu-toggle { display: inline-flex; align-items: center; justify-content: center; }
  .landing-menu { display: none; position: absolute; top: calc(100% + 8px); right: 0; flex-direction: column; align-items: stretch; min-width: 210px; padding: 12px; border: 1px solid var(--landing-border-dark); border-radius: 16px; background: var(--landing-bg-dark-raised); }
  .landing-menu.open { display: flex; }
  .landing-menu a { min-height: 44px; display: flex; align-items: center; }
  .landing-info { display: none; }
  .landing-section { padding: 86px 20px; }
  .landing-hero { padding-top: 120px; }
  #capabilities .split { grid-template-columns: minmax(0, 1fr); }
  h1 { font-size: clamp(40px, 12vw, 48px); line-height: 1.06; letter-spacing: -.045em; white-space: normal; }
  .card-grid,
  .flow-grid,
  .matrix,
  .list-grid,
  .safety-list,
  .landing-footer { grid-template-columns: 1fr; }
  .personal-bot-layout { grid-template-columns: 1fr; gap: 28px; }
  .personal-bot-features { grid-template-columns: 1fr; }
  .personal-bot-demo { padding: 20px; }
  .risk-alert-demo { padding: 20px; }
  .risk-alert-demo-header { align-items: flex-start; flex-direction: column; }
  .risk-alert-demo-body div { grid-template-columns: 1fr; gap: 6px; }
  .risk-alert-demo-body dd { text-align: left; }
  .comparison-panel { border: 0; background: transparent; }
  .comparison-table { display: block; }
  .comparison-table caption { display: block; width: 100%; max-width: 100%; padding: 0 0 22px; overflow-wrap: normal; word-break: normal; }
  .comparison-table thead { position: absolute; width: 1px; height: 1px; margin: -1px; padding: 0; clip: rect(0 0 0 0); clip-path: inset(50%); white-space: nowrap; }
  .comparison-table tbody,
  .comparison-table tr,
  .comparison-table th,
  .comparison-table td { display: block; }
  .comparison-table tbody { display: grid; gap: 14px; }
  .comparison-table tr { border: 1px solid var(--landing-border-dark); border-radius: 16px; background: var(--landing-bg-dark-raised); }
  .comparison-table tbody th { width: auto; padding: 18px; border-top: 0; color: var(--landing-text-on-dark); font-size: 18px; }
  .comparison-table td { padding: 14px 18px 18px; }
  .comparison-table td::before { content: attr(data-label); display: block; margin-bottom: 7px; color: var(--landing-text-on-dark); font-size: 12px; font-weight: 800; letter-spacing: .06em; }
  .landing-actions-centered { flex-direction: column; align-items: center; }
  .landing-actions-centered .landing-button { width: min(100%, 280px); }
  .footer-boundary { justify-self: start; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: 0.01ms; animation-iteration-count: 1; transition-duration: 0.01ms; }
  .landing-preview,
  .personal-bot-demo { transform: none; }
}