:root {
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: "Cascadia Code", Consolas, "SFMono-Regular", Menlo, monospace;
  --site-bg: #f4f6f5;
  --site-paper: #ffffff;
  --site-ink: #111827;
  --site-muted: #596273;
  --site-line: #d7dce2;
  --site-blue: #2457d6;
  --site-blue-dark: #183a91;
  --site-red: #c63737;
  --site-mist: #e9eef9;
  --site-radius: 18px;
  --site-shadow: 0 22px 60px rgba(28, 39, 58, 0.09);
}

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

html {
  scroll-behavior: smooth;
}

.site-body {
  margin: 0;
  color: var(--site-ink);
  background:
    linear-gradient(rgba(24, 58, 145, 0.035) 1px, transparent 1px),
    var(--site-bg);
  background-size: 100% 32px;
  font-family: var(--font-sans);
  font-size: 14px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

.site-body a {
  color: var(--site-blue);
  text-decoration: none;
}

.site-body a:focus-visible {
  outline: 3px solid rgba(36, 87, 214, 0.35);
  outline-offset: 4px;
}

.site-topbar {
  width: min(1180px, calc(100% - 40px));
  min-height: 76px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  border-bottom: 1px solid var(--site-line);
}

.site-wordmark {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--site-ink);
  font-weight: 700;
  letter-spacing: -0.02em;
}

.site-wordmark:hover,
.site-nav a:hover,
.site-footer a:hover {
  text-decoration: none;
}

.site-wordmark-mark {
  width: 30px;
  height: 30px;
  display: grid;
  place-items: center;
  color: white;
  background: var(--site-blue);
  border-radius: 7px 7px 7px 2px;
  font-family: var(--font-mono);
  font-size: 13px;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 24px;
  font-size: 13px;
}

.site-nav a {
  color: var(--site-muted);
}

.site-nav a:hover {
  color: var(--site-ink);
}

.site-nav .site-nav-login {
  padding: 9px 14px;
  color: var(--site-ink);
  border: 1px solid var(--site-line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.72);
}

.site-hero {
  width: min(1180px, calc(100% - 40px));
  min-height: 650px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(390px, 0.8fr);
  align-items: center;
  gap: clamp(46px, 7vw, 100px);
  padding: 78px 0 86px;
}

.site-kicker {
  margin: 0 0 18px;
  color: var(--site-blue);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.12em;
}

.site-hero h1 {
  max-width: 760px;
  margin: 0;
  color: var(--site-ink);
  font-size: clamp(44px, 6vw, 78px);
  font-weight: 750;
  line-height: 1.06;
  letter-spacing: -0.065em;
}

.site-lead {
  max-width: 650px;
  margin: 28px 0 0;
  color: var(--site-muted);
  font-size: clamp(17px, 1.8vw, 21px);
  line-height: 1.75;
}

.site-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 34px;
}

.site-button {
  min-height: 48px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 20px;
  border-radius: 9px;
  font-weight: 650;
  transition: transform 160ms ease, box-shadow 160ms ease, background 160ms ease;
}

.site-button:hover {
  text-decoration: none;
  transform: translateY(-2px);
}

.site-body .site-button-primary {
  color: #fff;
  background: var(--site-blue);
  box-shadow: 0 10px 24px rgba(36, 87, 214, 0.2);
}

.site-body .site-button-primary:hover {
  color: #fff;
  background: var(--site-blue-dark);
}

.site-button-secondary {
  color: var(--site-ink);
  background: var(--site-paper);
  border: 1px solid var(--site-line);
}

.site-fineprint {
  margin: 18px 0 0;
  color: #727b89;
  font-size: 12px;
}

.signal-ledger {
  position: relative;
  min-height: 480px;
  padding: 22px 24px 28px;
  overflow: hidden;
  background: var(--site-paper);
  border: 1px solid rgba(17, 24, 39, 0.12);
  border-radius: var(--site-radius);
  box-shadow: var(--site-shadow);
  transform: rotate(1deg);
}

.signal-ledger::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(90deg, transparent 0 95%, rgba(36, 87, 214, 0.055) 95%);
  background-size: 26px 100%;
}

.signal-ledger-head {
  position: relative;
  display: flex;
  justify-content: space-between;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--site-line);
  color: var(--site-muted);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.signal-ledger-live {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: #27734d;
}

.signal-ledger-live i {
  width: 7px;
  height: 7px;
  display: block;
  border-radius: 50%;
  background: #2fa36b;
  box-shadow: 0 0 0 5px rgba(47, 163, 107, 0.11);
}

.signal-rail {
  position: relative;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
}

.signal-rail::before {
  content: "";
  position: absolute;
  top: 17px;
  bottom: 30px;
  left: 80px;
  width: 1px;
  background: var(--site-line);
}

.signal-rail li {
  position: relative;
  min-height: 86px;
  display: grid;
  grid-template-columns: 58px 1fr;
  column-gap: 34px;
  align-content: start;
}

.signal-rail li::before {
  content: "";
  position: absolute;
  top: 8px;
  left: 76px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--site-paper);
  border: 2px solid var(--site-blue);
}

.signal-rail .signal-final::before {
  background: var(--site-blue);
  box-shadow: 0 0 0 6px var(--site-mist);
}

.signal-time {
  padding-top: 3px;
  color: #8a93a1;
  font-family: var(--font-mono);
  font-size: 11px;
}

.signal-node {
  color: var(--site-ink);
  font-size: 15px;
  font-weight: 700;
}

.signal-note {
  grid-column: 2;
  margin-top: 4px;
  color: var(--site-muted);
  font-size: 12px;
}

.privacy-stamp {
  position: absolute;
  right: 25px;
  bottom: 24px;
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 7px 11px;
  color: var(--site-red);
  border: 2px solid rgba(198, 55, 55, 0.76);
  border-radius: 5px;
  transform: rotate(-5deg);
  font-family: var(--font-mono);
  text-transform: uppercase;
}

.privacy-stamp strong {
  color: inherit;
  font-size: 29px;
  line-height: 1;
}

.privacy-stamp span {
  font-size: 9px;
  line-height: 1.35;
  letter-spacing: 0.06em;
}

.site-proof {
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  background: var(--site-ink);
  border-radius: 12px;
  overflow: hidden;
}

.site-proof div {
  min-height: 112px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 22px 26px;
  border-right: 1px solid rgba(255, 255, 255, 0.12);
}

.site-proof div:last-child {
  border-right: 0;
}

.site-proof strong {
  color: #fff;
  font-family: var(--font-mono);
  font-size: 20px;
}

.site-proof span {
  margin-top: 5px;
  color: #aeb6c2;
  font-size: 12px;
}

.site-section {
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
  padding: 126px 0;
  border-bottom: 1px solid var(--site-line);
}

.site-section-intro {
  max-width: 760px;
}

.site-section-intro h2,
.site-contact h2 {
  margin: 0;
  color: var(--site-ink);
  font-size: clamp(32px, 4vw, 52px);
  line-height: 1.16;
  letter-spacing: -0.045em;
}

.site-section-intro > p:last-child {
  max-width: 620px;
  margin: 18px 0 0;
  color: var(--site-muted);
  font-size: 16px;
}

.workflow-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 64px;
}

.workflow-grid article {
  min-height: 280px;
  padding: 26px;
  background: rgba(255, 255, 255, 0.7);
  border-top: 3px solid var(--site-blue);
  border-radius: 0 0 12px 12px;
}

.workflow-index {
  color: var(--site-blue);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.12em;
}

.workflow-grid h3,
.trust-grid h3 {
  margin: 50px 0 12px;
  color: var(--site-ink);
  font-size: 21px;
  letter-spacing: -0.025em;
}

.workflow-grid p,
.trust-grid p,
.plan-card p,
.plan-card li,
.site-contact p {
  color: var(--site-muted);
  line-height: 1.8;
}

.plans-section {
  border-bottom: 0;
}

.plan-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-top: 58px;
  align-items: stretch;
}

.plan-card {
  position: relative;
  min-height: 390px;
  padding: 30px;
  background: var(--site-paper);
  border: 1px solid var(--site-line);
  border-radius: 14px;
}

.plan-card-featured {
  border-color: var(--site-blue);
  box-shadow: 0 22px 48px rgba(36, 87, 214, 0.1);
}

.plan-badge {
  position: absolute;
  top: 18px;
  right: 18px;
  padding: 4px 8px;
  color: var(--site-blue);
  background: var(--site-mist);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 700;
}

.plan-name {
  color: var(--site-muted);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
}

.plan-price {
  min-height: 88px;
  display: flex;
  align-items: end;
  padding: 18px 0;
  color: var(--site-ink);
  border-bottom: 1px solid var(--site-line);
  font-size: 25px;
  font-weight: 750;
  letter-spacing: -0.035em;
}

.plan-card ul {
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
}

.plan-card li {
  position: relative;
  padding-left: 18px;
  font-size: 14px;
}

.plan-card li + li {
  margin-top: 9px;
}

.plan-card li::before {
  content: "—";
  position: absolute;
  left: 0;
  color: var(--site-blue);
}

.plan-disclaimer {
  margin: 18px 0 0;
  color: #7b8491;
  font-size: 12px;
}

.trust-section {
  width: 100%;
  padding-right: max(20px, calc((100% - 1180px) / 2));
  padding-left: max(20px, calc((100% - 1180px) / 2));
  color: white;
  background: var(--site-ink);
  border-bottom: 0;
}

.trust-section .site-kicker {
  color: #90adff;
}

.trust-section .site-section-intro h2 {
  color: #fff;
}

.trust-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin-top: 58px;
}

.trust-grid article {
  padding: 28px 30px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 12px;
}

.trust-grid h3 {
  margin: 0 0 12px;
  color: #fff;
}

.trust-grid p {
  color: #aeb6c2;
}

.site-contact {
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.25fr 0.75fr;
  align-items: end;
  gap: 60px;
  padding: 116px 0;
}

.site-contact p:last-child {
  max-width: 640px;
  margin: 18px 0 0;
}

.site-contact-link {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  padding: 18px 0;
  color: var(--site-blue);
  border-bottom: 2px solid var(--site-blue);
  font-family: var(--font-mono);
  font-size: clamp(15px, 2vw, 20px);
}

.site-contact-link:hover {
  color: var(--site-blue-dark);
  text-decoration: none;
  border-color: var(--site-blue-dark);
}

.legal-dock {
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto 70px;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.legal-dock > div {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 20px;
  background: rgba(255, 255, 255, 0.66);
  border: 1px dashed #afb6c0;
  border-radius: 9px;
}

.legal-dock span,
.legal-dock strong,
.legal-dock p {
  font-size: 12px;
}

.legal-dock strong {
  color: var(--site-muted);
}

.legal-dock p {
  grid-column: 1 / -1;
  margin: 2px 0 0;
  color: #747d8a;
}

.site-footer {
  min-height: 86px;
  display: flex;
  align-items: center;
  gap: 28px;
  padding: 0 max(20px, calc((100% - 1180px) / 2));
  color: #89919d;
  background: #0b111c;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.04em;
}

.site-footer a {
  margin-left: auto;
  color: #c3cad4;
}

@media (max-width: 860px) {
  .site-topbar {
    min-height: 68px;
  }

  .site-nav > a:not(.site-nav-login) {
    display: none;
  }

  .site-hero {
    grid-template-columns: 1fr;
    padding-top: 62px;
  }

  .signal-ledger {
    width: min(100%, 540px);
    transform: none;
  }

  .site-proof {
    grid-template-columns: repeat(2, 1fr);
  }

  .site-proof div:nth-child(2) {
    border-right: 0;
  }

  .site-proof div:nth-child(-n + 2) {
    border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  }

  .workflow-grid,
  .plan-grid {
    grid-template-columns: 1fr;
  }

  .workflow-grid article {
    min-height: 230px;
  }

  .plan-card {
    min-height: auto;
  }

  .site-contact {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 560px) {
  .site-topbar,
  .site-hero,
  .site-proof,
  .site-section,
  .site-contact,
  .legal-dock {
    width: min(100% - 28px, 1180px);
  }

  .site-wordmark {
    font-size: 13px;
  }

  .site-nav-login {
    font-size: 11px;
  }

  .site-hero {
    min-height: auto;
    padding: 54px 0 68px;
  }

  .site-hero h1 {
    font-size: clamp(40px, 13vw, 58px);
  }

  .site-actions {
    flex-direction: column;
  }

  .site-button {
    width: 100%;
  }

  .signal-ledger {
    min-height: 460px;
    padding: 20px 18px;
  }

  .signal-rail::before {
    left: 66px;
  }

  .signal-rail li {
    grid-template-columns: 48px 1fr;
    column-gap: 28px;
  }

  .signal-rail li::before {
    left: 62px;
  }

  .privacy-stamp {
    right: 18px;
  }

  .site-proof {
    grid-template-columns: 1fr;
  }

  .site-proof div {
    min-height: 96px;
    border-right: 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  }

  .site-proof div:last-child {
    border-bottom: 0;
  }

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

  .trust-section {
    width: 100%;
  }

  .trust-grid,
  .legal-dock {
    grid-template-columns: 1fr;
  }

  .legal-dock p {
    grid-column: auto;
  }

  .site-footer {
    min-height: 120px;
    flex-direction: column;
    align-items: flex-start;
    justify-content: center;
    gap: 8px;
  }

  .site-footer a {
    margin-left: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .site-button {
    transition: none;
  }
}