:root {
  --bg: #f5f7fb;
  --panel: #ffffff;
  --ink: #172033;
  --muted: #667085;
  --line: #dbe3ee;
  --nav: #101828;
  --blue: #1f6feb;
  --cyan: #19a7ce;
  --green: #2eaf7d;
  --shadow: 0 18px 45px rgba(16, 24, 40, 0.11);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: Arial, "Microsoft YaHei", "PingFang SC", sans-serif;
  color: var(--ink);
  background: var(--bg);
}

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

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 68px;
  padding: 0 clamp(18px, 5vw, 72px);
  color: #fff;
  background: rgba(16, 24, 40, 0.94);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(16px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-size: 17px;
  font-weight: 700;
}

.brand-mark {
  display: grid;
  width: 34px;
  height: 34px;
  place-items: center;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--blue), var(--green));
  color: #fff;
  font-size: 16px;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 24px;
  color: rgba(255, 255, 255, 0.78);
  font-size: 14px;
}

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

.hero {
  display: grid;
  grid-template-columns: minmax(0, 0.94fr) minmax(360px, 1.06fr);
  gap: clamp(28px, 5vw, 72px);
  align-items: center;
  min-height: calc(100vh - 68px);
  padding: clamp(44px, 7vw, 84px) clamp(18px, 5vw, 72px) clamp(34px, 5vw, 64px);
  color: #fff;
  background:
    radial-gradient(circle at 85% 18%, rgba(46, 175, 125, 0.3), transparent 30%),
    linear-gradient(135deg, #101828 0%, #17385f 48%, #0d2536 100%);
}

.hero-content {
  max-width: 720px;
}

.eyebrow,
.section-kicker {
  margin: 0 0 12px;
  color: var(--cyan);
  font-size: 14px;
  font-weight: 700;
}

.hero h1 {
  margin: 0;
  font-size: clamp(38px, 6vw, 68px);
  line-height: 1.06;
  letter-spacing: 0;
}

.hero-copy {
  max-width: 620px;
  margin: 22px 0 0;
  color: rgba(255, 255, 255, 0.8);
  font-size: clamp(17px, 2vw, 21px);
  line-height: 1.75;
}

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

.primary-action,
.secondary-action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 22px;
  border-radius: 8px;
  font-weight: 700;
}

.primary-action {
  color: #fff;
  background: var(--blue);
}

.secondary-action {
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.28);
}

.industry-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 30px;
}

.industry-strip span {
  padding: 8px 12px;
  color: rgba(255, 255, 255, 0.86);
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.06);
}

.hero-visual {
  align-self: stretch;
  display: flex;
  align-items: center;
}

.hero-visual img {
  width: 100%;
  filter: drop-shadow(0 26px 52px rgba(0, 0, 0, 0.28));
}

.section {
  padding: clamp(50px, 7vw, 86px) clamp(18px, 5vw, 72px);
}

.intro-band {
  display: grid;
  grid-template-columns: minmax(260px, 0.75fr) minmax(0, 1fr);
  gap: 28px;
  align-items: end;
  background: #fff;
  border-bottom: 1px solid var(--line);
}

.intro-band h2,
.section-heading h2 {
  margin: 0;
  font-size: clamp(28px, 4vw, 42px);
  line-height: 1.2;
  letter-spacing: 0;
}

.intro-band p:last-child {
  margin: 0;
  color: var(--muted);
  font-size: 17px;
  line-height: 1.8;
}

.section-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 30px;
}

.section-heading.compact {
  max-width: 760px;
}

.filter-tabs {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 10px;
}

.filter-tab {
  min-height: 38px;
  padding: 0 15px;
  color: var(--muted);
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 999px;
  cursor: pointer;
}

.filter-tab.is-active {
  color: #fff;
  background: var(--nav);
  border-color: var(--nav);
}

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

.system-card {
  overflow: hidden;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 8px 24px rgba(16, 24, 40, 0.06);
}

.system-image {
  aspect-ratio: 16 / 10;
  background: #eaf0f8;
}

.system-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.system-content {
  padding: 20px;
}

.system-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  color: var(--blue);
  font-size: 13px;
  font-weight: 700;
}

.system-meta span:last-child {
  color: var(--muted);
  font-weight: 400;
}

.system-card h3 {
  margin: 12px 0 8px;
  font-size: 20px;
}

.system-card p {
  min-height: 78px;
  margin: 0;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.7;
}

.feature-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 18px;
}

.feature-list span {
  padding: 6px 9px;
  color: #23527c;
  background: #eef6ff;
  border-radius: 6px;
  font-size: 13px;
}

.capability-section {
  background: #fff;
  border-top: 1px solid var(--line);
}

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

.capability-grid article {
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

.capability-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  color: #fff;
  background: linear-gradient(135deg, var(--blue), var(--cyan));
  border-radius: 8px;
  font-weight: 700;
}

.capability-grid h3 {
  margin: 18px 0 10px;
  font-size: 19px;
}

.capability-grid p {
  margin: 0;
  color: var(--muted);
  line-height: 1.75;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 24px clamp(18px, 5vw, 72px);
  color: rgba(255, 255, 255, 0.72);
  background: var(--nav);
}

@media (max-width: 1080px) {
  .hero,
  .intro-band {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
  }

  .hero-visual {
    max-width: 760px;
  }

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

@media (max-width: 720px) {
  .site-header {
    position: static;
    align-items: flex-start;
    flex-direction: column;
    gap: 14px;
    padding-top: 16px;
    padding-bottom: 16px;
  }

  .site-nav {
    width: 100%;
    justify-content: space-between;
    gap: 10px;
    font-size: 13px;
  }

  .hero {
    padding-top: 44px;
  }

  .hero-actions a {
    width: 100%;
  }

  .section-heading {
    align-items: stretch;
    flex-direction: column;
  }

  .filter-tabs {
    justify-content: flex-start;
  }

  .system-grid,
  .capability-grid {
    grid-template-columns: 1fr;
  }

  .system-card p {
    min-height: 0;
  }

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