:root {
  --ink: #17202b;
  --ink-soft: #4b5563;
  --ink-muted: #6b7280;
  --paper: #f6f8fb;
  --surface: #ffffff;
  --surface-strong: #f9fbfd;
  --line: #dbe2ea;
  --line-strong: #c7d2df;
  --teal: #0f766e;
  --teal-deep: #0b4f4a;
  --mint: #e6f5f1;
  --red: #b42318;
  --amber: #b7791f;
  --blue: #2454a6;
  --shadow: 0 18px 48px rgba(19, 32, 46, 0.13);
  --max: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family:
    -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", "PingFang SC",
    "Hiragino Sans GB", Arial, sans-serif;
  line-height: 1.6;
  letter-spacing: 0;
}

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

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

button,
input,
textarea {
  font: inherit;
}

.site-header {
  position: fixed;
  z-index: 20;
  top: 0;
  left: 0;
  right: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 72px;
  padding: 12px max(24px, calc((100vw - var(--max)) / 2));
  color: #fff;
  transition:
    background 180ms ease,
    color 180ms ease,
    box-shadow 180ms ease;
}

.site-header.is-scrolled,
.site-header.is-open {
  color: var(--ink);
  background: rgba(255, 255, 255, 0.95);
  border-bottom: 1px solid var(--line);
  box-shadow: 0 10px 28px rgba(20, 28, 38, 0.08);
  backdrop-filter: blur(14px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
  padding: 6px 10px 6px 6px;
  background: rgba(255, 255, 255, 0.9);
  border-radius: 10px;
  box-shadow: 0 10px 28px rgba(12, 18, 26, 0.12);
}

.brand-logo {
  width: 132px;
  height: auto;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 22px;
  font-size: 14px;
}

.site-nav a {
  white-space: nowrap;
  opacity: 0.9;
}

.site-nav a:hover {
  opacity: 1;
}

.nav-cta {
  padding: 9px 14px;
  border: 1px solid currentColor;
  border-radius: 6px;
}

.menu-toggle {
  display: none;
  min-height: 38px;
  padding: 0 12px;
  color: inherit;
  border: 1px solid currentColor;
  background: transparent;
  border-radius: 6px;
}

.hero {
  position: relative;
  min-height: 88vh;
  overflow: hidden;
  color: #fff;
  background: #121923;
}

.hero-bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  opacity: 0.88;
  filter: saturate(0.95) contrast(1.04);
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(8, 13, 20, 0.96), rgba(8, 13, 20, 0.9) 36%, rgba(8, 13, 20, 0.58) 62%, rgba(8, 13, 20, 0.32)),
    linear-gradient(180deg, rgba(8, 13, 20, 0.12), rgba(8, 13, 20, 0.34));
}

.hero-inner {
  position: relative;
  z-index: 1;
  display: flex;
  width: min(var(--max), calc(100% - 48px));
  min-height: 88vh;
  margin: 0 auto;
  padding: 138px 0 56px;
  flex-direction: column;
  justify-content: center;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--teal);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0;
}

.hero .eyebrow {
  color: #7ce4d2;
}

.hero h1 {
  max-width: 880px;
  margin: 0;
  font-size: clamp(52px, 8vw, 108px);
  line-height: 0.96;
  font-weight: 900;
  letter-spacing: 0;
}

.hero-lede {
  max-width: 760px;
  margin: 18px 0 0;
  color: rgba(255, 255, 255, 0.9);
  font-size: clamp(18px, 2vw, 26px);
  line-height: 1.32;
  font-weight: 800;
}

.hero-copy {
  max-width: 660px;
  margin: 16px 0 0;
  color: rgba(255, 255, 255, 0.86);
  font-size: clamp(16px, 2vw, 20px);
}

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

.button {
  display: inline-flex;
  min-height: 46px;
  align-items: center;
  justify-content: center;
  padding: 0 18px;
  border-radius: 6px;
  font-weight: 800;
  line-height: 1.1;
  transition:
    transform 160ms ease,
    box-shadow 160ms ease,
    background 160ms ease;
}

.button:hover {
  transform: translateY(-1px);
}

.button.primary {
  color: #fff;
  border: 1px solid var(--teal);
  background: var(--teal);
  box-shadow: 0 12px 28px rgba(15, 118, 110, 0.28);
}

.button.secondary {
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.5);
  background: rgba(255, 255, 255, 0.08);
}

.demo-form .button.primary {
  width: 100%;
}

.hero-metrics {
  display: grid;
  width: min(680px, 100%);
  margin: 56px 0 0;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border-top: 1px solid rgba(255, 255, 255, 0.24);
  border-bottom: 1px solid rgba(255, 255, 255, 0.24);
}

.hero-metrics div {
  padding: 18px 18px 18px 0;
}

.hero-metrics dt {
  margin: 0;
  font-size: clamp(24px, 3vw, 36px);
  font-weight: 900;
  line-height: 1;
}

.hero-metrics dd {
  margin: 8px 0 0;
  color: rgba(255, 255, 255, 0.76);
  font-size: 13px;
}

.section {
  padding: 92px 0;
}

.section-inner {
  width: min(var(--max), calc(100% - 48px));
  margin: 0 auto;
}

.section-heading {
  max-width: 760px;
  margin-bottom: 34px;
}

.section-heading.center {
  margin-right: auto;
  margin-left: auto;
  text-align: center;
}

.single-line-heading {
  max-width: min(1080px, 100%);
}

h2 {
  margin: 0;
  font-size: clamp(30px, 4vw, 52px);
  line-height: 1.12;
  font-weight: 900;
  letter-spacing: 0;
}

.single-line-title {
  font-size: clamp(32px, 3.2vw, 48px);
  white-space: nowrap;
}

h3 {
  margin: 0;
  font-size: 21px;
  line-height: 1.24;
  letter-spacing: 0;
}

p {
  color: var(--ink-soft);
}

.section-heading p,
.section-copy p,
.solution-panel p,
.demo-copy p {
  font-size: 17px;
}

.split {
  display: grid;
  align-items: start;
  gap: 56px;
  grid-template-columns: minmax(0, 0.95fr) minmax(360px, 1fr);
}

.split.reverse {
  grid-template-columns: minmax(320px, 0.7fr) minmax(0, 1fr);
}

.problem-section,
.capabilities-section,
.proof-section {
  background: var(--surface);
}

.signal-list {
  display: grid;
  gap: 14px;
}

.signal-item,
.capability-grid article,
.use-case-grid article,
.compliance-card,
.demo-form {
  border: 1px solid var(--line);
  background: var(--surface);
  border-radius: 8px;
}

.signal-item {
  padding: 22px;
}

.signal-item span,
.workflow span,
.card-index {
  color: var(--amber);
  font-size: 12px;
  font-weight: 900;
}

.signal-item strong {
  display: block;
  margin-top: 8px;
  font-size: 19px;
}

.signal-item p {
  margin: 8px 0 0;
}

.compliance-section {
  background: #eef5f4;
}

.compliance-grid {
  display: grid;
  gap: 18px;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.compliance-card {
  padding: 28px;
  box-shadow: 0 12px 30px rgba(16, 28, 42, 0.06);
}

.compliance-card.accent {
  border-color: rgba(15, 118, 110, 0.4);
  background: var(--mint);
}

.compliance-card h3 {
  margin-top: 12px;
}

.compliance-card ul {
  display: grid;
  gap: 8px;
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
}

.compliance-card li {
  position: relative;
  padding-left: 18px;
  color: var(--ink-soft);
}

.compliance-card li::before {
  position: absolute;
  top: 0.73em;
  left: 0;
  width: 7px;
  height: 7px;
  background: var(--teal);
  border-radius: 50%;
  content: "";
  transform: translateY(-50%);
}

.workflow-section {
  background: #f2f5f8;
}

.workflow {
  display: grid;
  gap: 12px;
  margin: 0;
  padding: 0;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  list-style: none;
}

.workflow li {
  min-height: 178px;
  padding: 22px;
  border: 1px solid var(--line);
  background: var(--surface);
  border-radius: 8px;
}

.workflow strong {
  display: block;
  margin-top: 10px;
  font-size: 19px;
}

.workflow p {
  margin: 9px 0 0;
  font-size: 14px;
}

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

.capability-grid article {
  padding: 24px;
  border-top: 4px solid var(--teal);
}

.capability-grid article:nth-child(2),
.capability-grid article:nth-child(5) {
  border-top-color: var(--blue);
}

.capability-grid article:nth-child(3),
.capability-grid article:nth-child(6) {
  border-top-color: var(--amber);
}

.solutions-section {
  background: #17202b;
  color: #fff;
}

.solutions-section p,
.solutions-section span {
  color: rgba(255, 255, 255, 0.74);
}

.solutions-section .eyebrow {
  color: #7ce4d2;
}

.solution-panel {
  position: sticky;
  top: 102px;
}

.use-case-grid {
  display: grid;
  gap: 14px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.use-case-grid article {
  display: grid;
  gap: 8px;
  padding: 22px;
  background: rgba(255, 255, 255, 0.07);
  border-color: rgba(255, 255, 255, 0.14);
}

.use-case-grid strong {
  font-size: 20px;
}

.proof-grid {
  display: grid;
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--surface-strong);
  border-radius: 8px;
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.proof-grid div {
  padding: 30px 24px;
  border-right: 1px solid var(--line);
  text-align: center;
}

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

.proof-grid strong {
  display: block;
  color: var(--teal-deep);
  font-size: clamp(34px, 5vw, 58px);
  line-height: 1;
}

.proof-grid span {
  display: block;
  margin-top: 10px;
  color: var(--ink-soft);
  font-weight: 700;
}

.proof-story {
  max-width: 820px;
  margin: 24px auto 0;
  text-align: center;
}

.audit-section {
  background: #f4f7fa;
}

.audit-layout {
  display: grid;
  align-items: start;
  gap: 38px;
  grid-template-columns: minmax(0, 0.88fr) minmax(0, 1fr);
}

.audit-list {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  list-style: none;
}

.audit-list li {
  padding: 16px 18px;
  border: 1px solid var(--line);
  background: var(--surface);
  border-radius: 8px;
  font-weight: 800;
}

.demo-section {
  background: var(--surface);
}

.demo-layout {
  display: grid;
  gap: 56px;
  grid-template-columns: minmax(0, 0.78fr) minmax(360px, 1fr);
}

.demo-form {
  display: grid;
  gap: 16px;
  padding: 28px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  box-shadow: var(--shadow);
}

.demo-form label {
  display: grid;
  gap: 8px;
  color: var(--ink);
  font-size: 14px;
  font-weight: 800;
}

.demo-form .full {
  grid-column: 1 / -1;
}

.demo-form input,
.demo-form textarea {
  width: 100%;
  border: 1px solid var(--line-strong);
  background: #fff;
  border-radius: 6px;
  color: var(--ink);
  outline: none;
}

.demo-form input {
  height: 44px;
  padding: 0 12px;
}

.demo-form textarea {
  min-height: 112px;
  padding: 12px;
  resize: vertical;
}

.demo-form input:focus,
.demo-form textarea:focus {
  border-color: var(--teal);
  box-shadow: 0 0 0 3px rgba(15, 118, 110, 0.12);
}

.form-note {
  grid-column: 1 / -1;
  margin: -2px 0 0;
  color: var(--ink-muted);
  font-size: 13px;
}

.form-note.is-success {
  color: var(--teal-deep);
  font-weight: 800;
}

.site-footer {
  padding: 34px 0;
  color: rgba(255, 255, 255, 0.76);
  background: #111821;
}

.footer-inner {
  display: flex;
  width: min(var(--max), calc(100% - 48px));
  margin: 0 auto;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.footer-inner strong {
  color: #fff;
}

.footer-logo {
  width: 132px;
  height: auto;
  padding: 6px 10px 6px 6px;
  background: #fff;
  border-radius: 10px;
}

.footer-inner p {
  margin: 6px 0 0;
  color: rgba(255, 255, 255, 0.62);
}

.footer-inner nav {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
}

@media (max-width: 980px) {
  .site-header {
    min-height: 64px;
    padding-right: 24px;
    padding-left: 24px;
  }

  .menu-toggle {
    display: inline-flex;
    align-items: center;
  }

  .site-nav {
    position: absolute;
    top: 64px;
    right: 24px;
    display: none;
    width: min(320px, calc(100vw - 48px));
    padding: 16px;
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    border: 1px solid var(--line);
    background: #fff;
    border-radius: 8px;
    color: var(--ink);
    box-shadow: var(--shadow);
  }

  .site-nav.is-open {
    display: flex;
  }

  .site-nav a {
    padding: 10px 8px;
  }

  .nav-cta {
    text-align: center;
  }

  .hero,
  .hero-inner {
    min-height: 84vh;
  }

  .split,
  .split.reverse,
  .audit-layout,
  .demo-layout {
    grid-template-columns: 1fr;
  }

  .solution-panel {
    position: static;
  }

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

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

@media (max-width: 959px) {
  .single-line-title {
    white-space: normal;
  }
}

@media (max-width: 680px) {
  .section {
    padding: 66px 0;
  }

  .section-inner,
  .hero-inner,
  .footer-inner {
    width: min(100% - 32px, var(--max));
  }

  .hero-inner {
    padding-top: 108px;
    padding-bottom: 34px;
  }

  .hero-overlay {
    background:
      linear-gradient(90deg, rgba(8, 13, 20, 0.98), rgba(8, 13, 20, 0.94)),
      linear-gradient(180deg, rgba(8, 13, 20, 0.24), rgba(8, 13, 20, 0.52));
  }

  .hero-bg {
    opacity: 0.28;
    object-position: 72% center;
  }

  .hero-actions,
  .button {
    width: 100%;
  }

  .hero-metrics,
  .proof-grid,
  .audit-list,
  .use-case-grid,
  .compliance-grid,
  .capability-grid,
  .workflow,
  .demo-form {
    grid-template-columns: 1fr;
  }

  .hero-metrics div {
    padding-right: 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.18);
  }

  .hero-metrics div:last-child,
  .proof-grid div:last-child {
    border-bottom: 0;
  }

  .proof-grid div {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .demo-form {
    padding: 20px;
  }

  .footer-inner {
    align-items: flex-start;
    flex-direction: column;
  }
}