:root {
  --ink: #102033;
  --muted-ink: #587086;
  --soft-ink: #8797a6;
  --line: #dce7ef;
  --panel: #ffffff;
  --wash: #f4f8fb;
  --deep: #071424;
  --deep-2: #0c2237;
  --blue: #1268d7;
  --cyan: #12b8d6;
  --aqua: #58d3c7;
  --shadow: 0 22px 60px rgba(16, 32, 51, 0.14);
  --radius: 8px;
  color-scheme: light;
  font-family: "PingFang SC", "Microsoft YaHei", "Heiti SC", Arial, sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: #ffffff;
  font-size: 16px;
  line-height: 1.7;
}

img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 72px;
  padding: 12px clamp(18px, 5vw, 72px);
  background: rgba(255, 255, 255, 0.9);
  border-bottom: 1px solid rgba(220, 231, 239, 0.82);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: 210px;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius);
  color: #ffffff;
  background: linear-gradient(135deg, var(--blue), var(--cyan));
  font-weight: 800;
}

.brand strong,
.brand small {
  display: block;
}

.brand strong {
  font-size: 16px;
  line-height: 1.2;
}

.brand small {
  color: var(--muted-ink);
  font-size: 11px;
  line-height: 1.4;
}

.nav-links {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: clamp(14px, 2.5vw, 34px);
  color: #39546a;
  font-size: 14px;
  font-weight: 600;
}

.nav-links a {
  padding: 10px 0;
}

.header-cta,
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  border-radius: var(--radius);
  font-weight: 700;
  transition: transform 160ms ease, border-color 160ms ease, background 160ms ease;
}

.header-cta {
  min-width: 106px;
  color: #ffffff;
  background: var(--ink);
  font-size: 14px;
}

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

.section {
  padding: clamp(68px, 9vw, 118px) clamp(18px, 5vw, 72px);
}

.section-dark {
  color: #ffffff;
  background:
    radial-gradient(circle at 78% 22%, rgba(18, 184, 214, 0.2), transparent 32%),
    linear-gradient(135deg, var(--deep), var(--deep-2) 58%, #07101e);
}

.hero {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 0.82fr) minmax(420px, 1.18fr);
  align-items: center;
  min-height: calc(100vh - 72px);
  gap: clamp(28px, 5vw, 76px);
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  inset: auto 0 0;
  height: 36%;
  background: linear-gradient(to top, rgba(7, 20, 36, 0.84), transparent);
  pointer-events: none;
}

.hero-copy,
.hero-visual {
  position: relative;
  z-index: 1;
}

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

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

h1 {
  max-width: 720px;
  margin-bottom: 22px;
  font-size: clamp(40px, 5.4vw, 76px);
  line-height: 1.08;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 18px;
  font-size: clamp(30px, 4vw, 48px);
  line-height: 1.18;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 10px;
  font-size: 20px;
  line-height: 1.32;
}

.hero-lede {
  max-width: 630px;
  color: rgba(255, 255, 255, 0.78);
  font-size: clamp(17px, 1.5vw, 21px);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 34px;
}

.button {
  min-width: 150px;
  padding: 12px 22px;
}

.button.primary {
  color: #071424;
  background: #ffffff;
}

.button.secondary {
  color: #ffffff;
  border: 1px solid rgba(255, 255, 255, 0.35);
}

.hero-metrics {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  max-width: 720px;
  margin: 48px 0 0;
}

.hero-metrics div {
  padding: 18px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.07);
}

.hero-metrics dt {
  color: #ffffff;
  font-size: 24px;
  font-weight: 800;
}

.hero-metrics dd {
  margin: 4px 0 0;
  color: rgba(255, 255, 255, 0.66);
  font-size: 13px;
}

.hero-visual {
  height: min(68vh, 680px);
  min-height: 440px;
  border-radius: var(--radius);
  box-shadow: 0 28px 90px rgba(0, 0, 0, 0.45);
  overflow: hidden;
}

.hero-visual::after,
.feature-panel::after,
.about-image::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(7, 20, 36, 0.22), transparent 46%);
  pointer-events: none;
}

.intro {
  display: grid;
  grid-template-columns: minmax(260px, 0.62fr) minmax(0, 1fr);
  gap: clamp(28px, 6vw, 82px);
  align-items: start;
  border-bottom: 1px solid var(--line);
}

.intro-text {
  color: var(--muted-ink);
  font-size: clamp(18px, 2vw, 24px);
}

.section-heading {
  max-width: 720px;
}

.section-heading.wide {
  display: grid;
  grid-template-columns: minmax(240px, 0.72fr) minmax(0, 1fr);
  align-items: end;
  max-width: none;
  gap: 28px;
  margin-bottom: 34px;
}

.section-heading.wide p:last-child {
  color: var(--muted-ink);
  font-size: 18px;
}

.capability-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 22px;
}

.image-card {
  min-width: 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  box-shadow: 0 18px 42px rgba(16, 32, 51, 0.08);
}

.image-card img {
  height: 248px;
}

.card-body {
  padding: 24px;
}

.card-body span {
  color: var(--blue);
  font-size: 13px;
  font-weight: 800;
}

.card-body p,
.split-copy p,
.about-copy p,
.scenario-grid p,
.advantage-grid p {
  color: var(--muted-ink);
}

.split-section {
  display: grid;
  grid-template-columns: minmax(0, 0.84fr) minmax(390px, 1fr);
  gap: clamp(30px, 5vw, 70px);
  align-items: center;
}

.solution-list {
  display: grid;
  gap: 14px;
  margin-top: 28px;
}

.solution-list article {
  padding: 18px 0 18px 18px;
  border-left: 3px solid var(--cyan);
  background: linear-gradient(90deg, rgba(18, 184, 214, 0.08), transparent);
}

.solution-list strong,
.solution-list span {
  display: block;
}

.solution-list span {
  margin-top: 4px;
  color: var(--muted-ink);
}

.feature-panel,
.about-image {
  position: relative;
  min-height: 520px;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.panel-note {
  position: absolute;
  left: 22px;
  right: 22px;
  bottom: 22px;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 18px;
  color: #ffffff;
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: var(--radius);
  background: rgba(7, 20, 36, 0.68);
  backdrop-filter: blur(14px);
}

.panel-note strong,
.panel-note span {
  display: block;
}

.panel-note span {
  color: rgba(255, 255, 255, 0.7);
  font-size: 14px;
}

.muted {
  background: var(--wash);
}

.advantage-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}

.advantage-grid article,
.scenario-grid article {
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #ffffff;
}

.scenario-section {
  border-bottom: 1px solid var(--line);
}

.scenario-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
  margin-top: 30px;
}

.scenario-grid span {
  display: inline-flex;
  margin-bottom: 18px;
  color: var(--blue);
  font-size: 13px;
  font-weight: 800;
}

.about {
  display: grid;
  grid-template-columns: minmax(390px, 0.92fr) minmax(0, 0.78fr);
  gap: clamp(30px, 6vw, 78px);
  align-items: center;
}

.about-copy {
  max-width: 620px;
}

.contact {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(320px, 0.68fr);
  gap: clamp(28px, 5vw, 72px);
  align-items: center;
}

.contact p {
  max-width: 640px;
  color: rgba(255, 255, 255, 0.72);
}

.contact-panel {
  display: grid;
  gap: 1px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.12);
}

.contact-panel div {
  padding: 22px;
  background: rgba(255, 255, 255, 0.06);
}

.contact-panel span,
.contact-panel strong {
  display: block;
}

.contact-panel span {
  color: rgba(255, 255, 255, 0.58);
  font-size: 13px;
}

.contact-panel strong {
  margin-top: 8px;
  font-size: 18px;
}

.site-footer {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 26px clamp(18px, 5vw, 72px);
  color: var(--soft-ink);
  background: #06101c;
  font-size: 14px;
}

@media (max-width: 1080px) {
  .nav-links {
    display: none;
  }

  .hero,
  .split-section,
  .about,
  .contact {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
  }

  .hero-visual,
  .feature-panel,
  .about-image {
    min-height: 360px;
    height: 52vw;
  }

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

@media (max-width: 760px) {
  .site-header {
    min-height: 66px;
  }

  .brand {
    min-width: 0;
  }

  .brand small {
    display: none;
  }

  .header-cta {
    min-width: 86px;
    min-height: 38px;
  }

  .section {
    padding: 58px 18px;
  }

  .hero {
    padding-top: 42px;
  }

  h1 {
    font-size: 38px;
  }

  h2 {
    font-size: 30px;
  }

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

  .hero-metrics,
  .intro,
  .section-heading.wide,
  .capability-grid,
  .advantage-grid,
  .scenario-grid {
    grid-template-columns: 1fr;
  }

  .hero-metrics {
    margin-top: 32px;
  }

  .hero-visual,
  .feature-panel,
  .about-image {
    min-height: 300px;
    height: 66vw;
  }

  .image-card img {
    height: 220px;
  }

  .panel-note {
    position: static;
    margin: -1px 0 0;
    border-radius: 0;
    background: var(--deep);
  }
}