:root {
  --bg: #071829;
  --bg-soft: #0d2943;
  --panel: #ffffff;
  --panel-soft: rgba(255, 255, 255, 0.08);
  --line: rgba(18, 34, 54, 0.08);
  --text: #142234;
  --muted: #667489;
  --brand: #3d8bff;
  --brand-deep: #1e5fcd;
  --brand-soft: #dbe9ff;
  --ink: #09111c;
  --sand: #eaf3ff;
  --surface: #f4f8ff;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background: var(--surface);
}

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

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

.wrap {
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(18px);
  background: rgba(9, 17, 28, 0.78);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 72px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  color: #fff;
}

.brand-mark {
  width: 48px;
  height: 48px;
  display: grid;
  place-items: center;
  border-radius: 14px;
  background: linear-gradient(180deg, rgba(61, 139, 255, 0.18), rgba(61, 139, 255, 0.08));
  border: 1px solid rgba(61, 139, 255, 0.24);
  overflow: hidden;
}

.brand-mark-image img {
  width: 42px;
  height: 42px;
  object-fit: contain;
}

.brand-text {
  display: grid;
  gap: 2px;
}

.brand-text strong {
  font-size: 18px;
  letter-spacing: 0.03em;
}

.brand-text small {
  color: rgba(255, 255, 255, 0.7);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 24px;
  color: rgba(255, 255, 255, 0.82);
  font-size: 14px;
}

.nav-links a:hover {
  color: #fff;
}

.hero {
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(circle at top left, rgba(61, 139, 255, 0.24), transparent 36%),
    linear-gradient(135deg, #06111d 0%, #0a2641 58%, #071829 100%);
  color: #fff;
  padding: 78px 0 66px;
}

.hero::after {
  content: "";
  position: absolute;
  inset: auto -120px -140px auto;
  width: 380px;
  height: 380px;
  background: radial-gradient(circle, rgba(61, 139, 255, 0.28), transparent 68%);
  pointer-events: none;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 44px;
  align-items: center;
}

.eyebrow {
  margin: 0 0 14px;
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--brand);
  font-weight: 700;
}

.hero h1 {
  margin: 0;
  font-size: clamp(34px, 5vw, 58px);
  line-height: 1.08;
  letter-spacing: -0.03em;
}

.hero-text {
  margin: 22px 0 0;
  font-size: 17px;
  line-height: 1.9;
  color: rgba(255, 255, 255, 0.82);
  max-width: 640px;
}

.hero-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-top: 28px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 24px;
  border-radius: 999px;
  font-weight: 700;
  transition: transform 160ms ease, opacity 160ms ease, background 160ms ease;
}

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

.button-primary {
  background: linear-gradient(135deg, var(--brand), #7cb2ff);
  color: #fff;
}

.button-secondary {
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: #fff;
  background: rgba(255, 255, 255, 0.04);
}

.hero-visual img {
  width: 100%;
  border-radius: 28px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  box-shadow: 0 28px 80px rgba(0, 0, 0, 0.36);
}

.hero-ai-page {
  padding-bottom: 82px;
}

.stats {
  margin-top: -36px;
  position: relative;
  z-index: 2;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}

.stat-card {
  border-radius: 24px;
  padding: 24px 22px;
  background: rgba(255, 255, 255, 0.96);
  box-shadow: 0 20px 48px rgba(10, 24, 40, 0.08);
  border: 1px solid rgba(18, 34, 54, 0.06);
}

.stat-number {
  display: block;
  font-size: 30px;
  line-height: 1;
  font-weight: 800;
  color: var(--bg);
}

.stat-label {
  display: block;
  margin-top: 10px;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.65;
}

.section {
  padding: 88px 0;
}

.section-dark {
  background: linear-gradient(180deg, #0d2238 0%, #0a1728 100%);
  color: #fff;
}

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

.section-head.narrow {
  max-width: 640px;
}

.section-head h2 {
  margin: 0;
  font-size: clamp(28px, 3.2vw, 42px);
  line-height: 1.14;
}

.section-head p:last-child {
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.85;
}

.section-dark .section-head p:last-child,
.section-dark .feature-card p,
.section-dark .section-head {
  color: rgba(255, 255, 255, 0.82);
}

.about-grid,
.capability-grid,
.scenario-grid,
.footer-grid {
  display: grid;
  gap: 18px;
}

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

.capability-grid {
  grid-template-columns: repeat(5, 1fr);
}

.panel,
.feature-card,
.case-card,
.scenario-card {
  border-radius: 26px;
}

.panel {
  background: var(--panel);
  padding: 28px;
  border: 1px solid var(--line);
  box-shadow: 0 16px 40px rgba(10, 24, 40, 0.06);
}

.panel h3,
.feature-card h3,
.case-body h3,
.scenario-card h3,
.boundtrace-points h3 {
  margin: 0 0 12px;
  font-size: 20px;
}

.panel p,
.feature-card p,
.case-body p,
.scenario-card p,
.boundtrace-points p {
  margin: 0;
  line-height: 1.85;
  color: var(--muted);
}

.feature-card {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.1);
  padding: 24px 22px;
  min-height: 220px;
}

.case-stack {
  display: grid;
  gap: 20px;
  grid-template-columns: repeat(2, 1fr);
}

.case-card {
  overflow: hidden;
  background: var(--panel);
  border: 1px solid var(--line);
  box-shadow: 0 22px 54px rgba(10, 24, 40, 0.06);
}

.case-wide {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
}

.case-media {
  background: #edf2f8;
}

.case-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.case-body {
  padding: 28px 28px 30px;
}

.case-tag {
  display: inline-flex;
  margin-bottom: 14px;
  padding: 6px 12px;
  border-radius: 999px;
  background: var(--brand-soft);
  color: var(--brand-deep);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.case-body ul {
  margin: 18px 0 0;
  padding-left: 20px;
  color: var(--text);
  line-height: 1.8;
}

.ai-solutions {
  background:
    radial-gradient(circle at left top, rgba(61, 139, 255, 0.12), transparent 32%),
    linear-gradient(180deg, #f4f8ff 0%, #edf4ff 100%);
}

.ai-hero {
  display: grid;
  grid-template-columns: 1.02fr 0.98fr;
  gap: 22px;
  align-items: stretch;
}

.ai-visual,
.ai-summary,
.ai-card,
.ai-case-card {
  border-radius: 28px;
  background: var(--panel);
  border: 1px solid var(--line);
  box-shadow: 0 20px 48px rgba(10, 24, 40, 0.06);
}

.ai-visual {
  overflow: hidden;
}

.ai-visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.ai-summary {
  padding: 32px;
}

.ai-summary h3,
.ai-card h3,
.ai-case-card h3 {
  margin: 0 0 14px;
  font-size: 22px;
}

.ai-summary p,
.ai-card p,
.ai-case-card p {
  margin: 0;
  line-height: 1.85;
  color: var(--muted);
}

.ai-bullet-list {
  margin: 18px 0 0;
  padding-left: 20px;
  line-height: 1.85;
  color: var(--text);
}

.ai-actions {
  margin-top: 22px;
}

.ai-grid,
.ai-case-grid,
.delivery-grid,
.delivery-steps,
.delivery-lead,
.delivery-pillars {
  display: grid;
  gap: 18px;
}

.ai-grid {
  margin-top: 22px;
  grid-template-columns: repeat(4, 1fr);
}

.ai-card,
.ai-case-card {
  padding: 24px 22px;
}

.ai-case-grid {
  margin-top: 18px;
  grid-template-columns: repeat(3, 1fr);
}

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

.delivery-lead {
  grid-template-columns: 1.15fr 0.85fr;
  margin-bottom: 18px;
}

.delivery-summary,
.delivery-cost-panel {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.12);
  box-shadow: none;
}

.delivery-summary p,
.delivery-cost-panel p {
  color: rgba(255, 255, 255, 0.82);
}

.delivery-pillars {
  grid-template-columns: repeat(5, 1fr);
  margin-bottom: 18px;
}

.feature-card-strong {
  min-height: 240px;
  background:
    linear-gradient(180deg, rgba(61, 139, 255, 0.16), rgba(255, 255, 255, 0.04));
  border-color: rgba(120, 181, 255, 0.28);
}

.feature-card-strong h3 {
  color: #fff;
}

.feature-card-strong p {
  color: rgba(255, 255, 255, 0.84);
}

.delivery-steps {
  margin-top: 18px;
  grid-template-columns: repeat(4, 1fr);
}

.ai-case-stack .case-card {
  height: 100%;
}

.boundtrace {
  background:
    radial-gradient(circle at right top, rgba(191, 160, 98, 0.14), transparent 32%),
    linear-gradient(180deg, #f7f4ef 0%, #f1ece3 100%);
}

.boundtrace-hero {
  display: grid;
  grid-template-columns: 0.95fr 1.05fr;
  gap: 22px;
  align-items: stretch;
}

.boundtrace-copy,
.boundtrace-visual {
  border-radius: 28px;
  overflow: hidden;
  background: var(--panel);
  border: 1px solid var(--line);
  box-shadow: 0 20px 48px rgba(10, 24, 40, 0.06);
}

.boundtrace-points {
  padding: 34px;
  display: grid;
  gap: 26px;
}

.boundtrace-visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.scenario-grid {
  grid-template-columns: repeat(3, 1fr);
  margin-top: 22px;
}

.scenario-card {
  overflow: hidden;
  background: rgba(255, 255, 255, 0.9);
  border: 1px solid var(--line);
}

.scenario-card img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.scenario-card div {
  padding: 22px;
}

.site-footer {
  background: #0b141f;
  color: rgba(255, 255, 255, 0.76);
  padding: 34px 0 46px;
}

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

.site-footer strong {
  display: block;
  color: #fff;
  margin-bottom: 8px;
}

.site-footer p {
  margin: 0;
  line-height: 1.75;
}

@media (max-width: 1080px) {
  .capability-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .ai-grid,
  .ai-case-grid,
  .delivery-pillars {
    grid-template-columns: repeat(2, 1fr);
  }

  .delivery-lead,
  .delivery-grid,
  .delivery-steps {
    grid-template-columns: repeat(2, 1fr);
  }

  .about-grid,
  .scenario-grid,
  .footer-grid,
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .hero-grid,
  .ai-hero,
  .boundtrace-hero,
  .case-wide {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 720px) {
  .nav {
    flex-direction: column;
    align-items: flex-start;
    justify-content: center;
    padding: 14px 0;
  }

  .nav-links {
    flex-wrap: wrap;
    gap: 14px 18px;
  }

  .hero {
    padding-top: 48px;
  }

  .about-grid,
  .capability-grid,
  .ai-grid,
  .ai-case-grid,
  .delivery-lead,
  .delivery-pillars,
  .delivery-grid,
  .delivery-steps,
  .case-stack,
  .scenario-grid,
  .footer-grid,
  .stats-grid {
    grid-template-columns: 1fr;
  }

  .section {
    padding: 70px 0;
  }

  .case-body {
    padding: 22px;
  }
}