:root {
  --ink: #08111f;
  --muted: #667386;
  --soft: #eef5fb;
  --line: #e2ebf3;
  --blue: #0b79e3;
  --cyan: #2cc7f0;
  --green: #18a779;
  --amber: #b7791f;
  --surface: #ffffff;
  --mist: #f8fbff;
  --shadow: 0 24px 80px rgba(24, 62, 106, 0.11);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 16% 8%, rgba(11, 121, 227, 0.09), transparent 32%),
    linear-gradient(180deg, #fbfdff 0%, #f8fbff 48%, #ffffff 100%);
  font-family: Inter, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.62;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 18px clamp(20px, 5vw, 72px);
  border-bottom: 1px solid rgba(226, 235, 243, 0.78);
  background: rgba(251, 253, 255, 0.84);
  backdrop-filter: blur(20px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 17px;
  font-weight: 800;
}

.brand img {
  width: 36px;
  height: 36px;
}

.nav-links {
  display: flex;
  gap: clamp(18px, 3vw, 36px);
  color: var(--muted);
  font-size: 14px;
  font-weight: 650;
}

.nav-links a:hover {
  color: var(--blue);
}

.hero,
.section {
  padding-inline: clamp(20px, 5vw, 72px);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 0.96fr) minmax(380px, 0.84fr);
  gap: clamp(34px, 7vw, 96px);
  align-items: center;
  min-height: calc(100vh - 65px);
  padding-top: 58px;
  padding-bottom: 58px;
}

.hero-copy,
.section-heading,
.value-copy,
.product-copy {
  max-width: 840px;
}

.eyebrow,
.proof-label,
.case-kicker,
.metric-name {
  color: var(--blue);
  font-size: 13px;
  font-weight: 800;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 830px;
  margin-bottom: 24px;
  font-size: clamp(46px, 6vw, 82px);
  line-height: 1.04;
}

.hero-lead,
.section-heading p {
  max-width: 730px;
  color: #46576b;
  font-size: clamp(18px, 1.45vw, 21px);
}

.hero-lead {
  margin-bottom: 22px;
}

.signal-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 34px;
}

.signal-row span {
  min-height: 34px;
  padding: 6px 14px;
  border: 1px solid rgba(11, 121, 227, 0.15);
  border-radius: 999px;
  color: #28516f;
  background: rgba(255, 255, 255, 0.72);
  font-size: 13px;
  font-weight: 750;
}

.hero-actions,
.contact-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.primary-button,
.secondary-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 800;
  white-space: nowrap;
}

.primary-button {
  padding: 0 24px;
  color: #fff;
  background: #08111f;
  box-shadow: 0 14px 34px rgba(8, 17, 31, 0.18);
}

.secondary-button {
  padding: 0 22px;
  color: var(--ink);
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.86);
}

.hero-proof {
  align-self: center;
  min-width: 0;
  padding: clamp(24px, 3vw, 34px);
  border: 1px solid rgba(202, 218, 232, 0.92);
  border-radius: 26px;
  background: rgba(255, 255, 255, 0.78);
  box-shadow: var(--shadow);
}

.hero-proof h2 {
  margin: 14px 0 24px;
  font-size: clamp(28px, 3.3vw, 46px);
  line-height: 1.12;
}

.proof-stack {
  display: grid;
  gap: 10px;
}

.proof-stack div {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 16px 18px;
  border-radius: 18px;
  background: #f6fbff;
}

.proof-stack span {
  color: var(--muted);
  font-size: 14px;
  font-weight: 700;
}

.proof-stack strong {
  font-size: 22px;
}

.section {
  padding-top: 96px;
  padding-bottom: 96px;
}

.section-heading,
.value-copy,
.product-copy {
  margin-bottom: 42px;
}

.section-heading h2,
.value-copy h2,
.product-copy h2,
.contact-section h2 {
  margin-bottom: 16px;
  font-size: clamp(32px, 4vw, 56px);
  line-height: 1.12;
}

.case-section {
  background: rgba(248, 251, 255, 0.78);
}

.case-demo {
  display: grid;
  gap: 16px;
}

.case-summary,
.case-grid article,
.decision-trace {
  border: 1px solid var(--line);
  border-radius: 24px;
  background: rgba(255, 255, 255, 0.82);
  box-shadow: 0 18px 56px rgba(28, 68, 110, 0.07);
}

.case-summary {
  max-width: 980px;
  padding: clamp(26px, 4vw, 42px);
}

.case-summary h3 {
  margin: 10px 0 12px;
  font-size: clamp(28px, 3.4vw, 48px);
  line-height: 1.12;
}

.case-summary p {
  max-width: 780px;
  margin-bottom: 0;
  color: var(--muted);
  font-size: 18px;
}

.case-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.case-grid article {
  min-width: 0;
  padding: 24px;
}

.case-grid strong {
  display: block;
  margin: 10px 0 12px;
  font-size: clamp(28px, 3vw, 42px);
  line-height: 1.05;
}

.case-grid p,
.value-list p,
.question-stack p {
  margin-bottom: 0;
  color: var(--muted);
}

.decision-trace {
  display: grid;
  overflow: hidden;
}

.trace-row {
  display: grid;
  grid-template-columns: minmax(220px, 0.42fr) minmax(0, 1fr);
  gap: 28px;
  padding: 22px 26px;
  border-bottom: 1px solid var(--line);
}

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

.trace-row span {
  color: var(--muted);
  font-weight: 700;
}

.trace-row strong {
  font-size: 20px;
}

.value-section {
  background: #fff;
}

.value-list {
  display: grid;
  gap: 14px;
  max-width: 980px;
}

.value-list article {
  display: grid;
  grid-template-columns: minmax(220px, 0.45fr) minmax(0, 1fr);
  gap: 32px;
  align-items: start;
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: rgba(255, 255, 255, 0.82);
}

.value-list h3 {
  margin: 0;
  font-size: 22px;
  line-height: 1.3;
}

.product-section {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(360px, 1fr);
  gap: clamp(28px, 6vw, 88px);
  align-items: start;
  background: var(--mist);
}

.question-stack {
  display: grid;
  gap: 12px;
}

.question-stack p {
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: #fff;
  color: #2a394d;
  font-size: 17px;
  font-weight: 720;
  box-shadow: 0 12px 42px rgba(37, 76, 118, 0.06);
}

.contact-section {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  color: #fff;
  background: #08111f;
}

.contact-section .eyebrow {
  color: var(--cyan);
}

.contact-section h2 {
  max-width: 880px;
}

.contact-section .primary-button {
  color: #08111f;
  background: #fff;
  box-shadow: none;
}

.contact-actions {
  justify-content: flex-end;
}

.contact-actions .secondary-button {
  color: #fff;
  border-color: rgba(255, 255, 255, 0.18);
  background: rgba(255, 255, 255, 0.08);
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding: 28px clamp(20px, 5vw, 72px);
  color: var(--muted);
  border-top: 1px solid var(--line);
  font-size: 14px;
}

@media (max-width: 1040px) {
  .hero,
  .product-section {
    grid-template-columns: 1fr;
    min-height: auto;
  }

  .case-grid {
    grid-template-columns: 1fr;
  }

  .value-list article,
  .trace-row {
    grid-template-columns: 1fr;
    gap: 10px;
  }
}

@media (max-width: 740px) {
  .nav-links {
    display: none;
  }

  .hero {
    padding-top: 42px;
  }

  h1 {
    font-size: 44px;
  }

  .section {
    padding-top: 72px;
    padding-bottom: 72px;
  }

  .hero-proof,
  .case-summary,
  .case-grid article,
  .value-list article {
    padding: 22px;
  }

  .proof-stack div {
    align-items: flex-start;
    flex-direction: column;
    gap: 4px;
  }

  .contact-section,
  .site-footer {
    flex-direction: column;
    align-items: flex-start;
  }

  .contact-actions {
    justify-content: flex-start;
  }
}