:root {
  --bg: #f7fbf8;
  --surface: #ffffff;
  --ink: #10201d;
  --muted: #53625f;
  --line: #d9e7e1;
  --accent: #0f766e;
  --accent-dark: #124d47;
  --gold: #c79a33;
  --sky: #dff4ff;
  --mint: #dff7ec;
  --shadow: 0 24px 70px rgba(20, 61, 54, 0.13);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    "PingFang SC", "Microsoft YaHei", sans-serif;
  line-height: 1.6;
}

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(217, 231, 225, 0.8);
  background: rgba(247, 251, 248, 0.9);
  backdrop-filter: blur(18px);
}

.brand,
.nav,
.hero-actions,
.site-footer {
  display: flex;
  align-items: center;
}

.brand {
  gap: 10px;
  font-weight: 800;
  font-size: 18px;
}

.brand-mark {
  display: grid;
  width: 36px;
  height: 36px;
  place-items: center;
  border-radius: 10px;
  background: var(--accent);
  color: #fff;
  font-weight: 900;
}

.nav {
  gap: 26px;
  color: var(--muted);
  font-size: 15px;
}

.nav a,
.header-link,
.site-footer a {
  transition:
    color 180ms ease,
    transform 180ms ease;
}

.nav a:hover,
.header-link:hover,
.site-footer a:hover {
  color: var(--accent);
}

.header-link {
  color: var(--accent-dark);
  font-weight: 700;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.02fr) minmax(360px, 0.82fr);
  gap: clamp(32px, 5vw, 76px);
  align-items: center;
  min-height: calc(100vh - 74px);
  padding: clamp(56px, 8vw, 112px) clamp(20px, 5vw, 72px) 64px;
  background:
    linear-gradient(135deg, rgba(223, 247, 236, 0.88), rgba(247, 251, 248, 0) 42%),
    radial-gradient(circle at 92% 18%, rgba(199, 154, 51, 0.14), transparent 30%);
}

.hero h1 {
  max-width: 780px;
  margin: 0;
  font-size: clamp(46px, 7vw, 96px);
  line-height: 1.02;
  letter-spacing: 0;
}

.hero-copy p {
  max-width: 660px;
  margin: 28px 0 0;
  color: var(--muted);
  font-size: clamp(18px, 2vw, 22px);
}

.hero-actions {
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 36px;
}

.button {
  display: inline-flex;
  min-height: 46px;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  padding: 11px 18px;
  font-weight: 800;
  line-height: 1.2;
}

.button.primary {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 14px 30px rgba(15, 118, 110, 0.22);
}

.button.secondary {
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.74);
  color: var(--accent-dark);
}

.hero-panel {
  position: relative;
  min-height: 500px;
  overflow: hidden;
  border: 1px solid rgba(217, 231, 225, 0.95);
  border-radius: 28px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.92), rgba(255, 255, 255, 0.78)),
    linear-gradient(135deg, var(--sky), var(--mint));
  box-shadow: var(--shadow);
}

.panel-topline {
  display: flex;
  justify-content: space-between;
  padding: 24px;
  color: var(--muted);
  font-size: 13px;
}

.panel-topline strong {
  color: var(--accent-dark);
}

.orbit {
  position: absolute;
  inset: 76px 34px 34px;
  display: grid;
  place-items: center;
  border: 1px solid rgba(15, 118, 110, 0.2);
  border-radius: 999px;
}

.orbit::before,
.orbit::after {
  position: absolute;
  content: "";
  border: 1px solid rgba(15, 118, 110, 0.17);
  border-radius: 999px;
}

.orbit::before {
  inset: 56px 32px;
}

.orbit::after {
  inset: 118px 76px;
}

.orbit-core {
  position: relative;
  z-index: 1;
  display: grid;
  width: 136px;
  height: 136px;
  place-items: center;
  border-radius: 32px;
  background: var(--accent-dark);
  color: #fff;
  box-shadow: 0 20px 48px rgba(18, 77, 71, 0.24);
  font-size: 24px;
  font-weight: 900;
}

.orbit-node {
  position: absolute;
  display: grid;
  min-width: 78px;
  min-height: 42px;
  place-items: center;
  border: 1px solid rgba(217, 231, 225, 0.94);
  border-radius: 999px;
  background: #fff;
  color: var(--accent-dark);
  box-shadow: 0 12px 30px rgba(20, 61, 54, 0.1);
  font-size: 13px;
  font-weight: 900;
}

.node-one {
  top: 12%;
  left: 12%;
}

.node-two {
  top: 18%;
  right: 10%;
}

.node-three {
  right: 16%;
  bottom: 14%;
}

.node-four {
  left: 10%;
  bottom: 20%;
}

.section {
  padding: clamp(58px, 8vw, 104px) clamp(20px, 5vw, 72px);
}

.intro {
  border-block: 1px solid var(--line);
  background: var(--surface);
}

.intro p {
  max-width: 920px;
  margin: 0 auto;
  color: var(--accent-dark);
  font-size: clamp(21px, 3vw, 34px);
  font-weight: 750;
  line-height: 1.35;
  text-align: center;
}

code {
  border-radius: 6px;
  background: #eef8f4;
  color: var(--accent-dark);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.9em;
  padding: 0.1em 0.35em;
}

.section-heading {
  max-width: 720px;
  margin-bottom: 34px;
}

.section-heading h2,
.compliance-section h2 {
  margin: 0;
  font-size: clamp(32px, 4vw, 56px);
  line-height: 1.08;
}

.section-heading p,
.compliance-section p {
  margin: 14px 0 0;
  color: var(--muted);
  font-size: 18px;
}

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

.product-card {
  min-height: 260px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: 0 16px 44px rgba(20, 61, 54, 0.07);
}

.product-index {
  color: var(--gold);
  font-size: 14px;
  font-weight: 900;
}

.product-card h3,
.capability-list h3 {
  margin: 18px 0 10px;
  font-size: 22px;
}

.product-card p,
.capability-list p {
  margin: 0;
  color: var(--muted);
}

.capability-section {
  background: #10201d;
  color: #fff;
}

.capability-section .section-heading p,
.capability-list p {
  color: rgba(255, 255, 255, 0.68);
}

.capability-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.14);
}

.capability-list > div {
  padding: 28px;
  background: #10201d;
}

.compliance-section {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  background: var(--surface);
}

.compliance-section > div {
  max-width: 760px;
}

.compliance-section a:not(.button) {
  color: var(--accent);
  font-weight: 800;
}

.site-footer {
  justify-content: space-between;
  gap: 18px;
  padding: 26px clamp(20px, 5vw, 72px);
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 14px;
}

@media (max-width: 980px) {
  .hero {
    grid-template-columns: 1fr;
  }

  .hero-panel {
    min-height: 420px;
  }

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

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

  .nav {
    width: 100%;
    justify-content: space-between;
  }

  .hero {
    min-height: auto;
    padding-top: 44px;
  }

  .hero-panel {
    min-height: 340px;
    border-radius: 18px;
  }

  .orbit {
    inset: 64px 18px 20px;
  }

  .orbit-core {
    width: 108px;
    height: 108px;
    border-radius: 24px;
    font-size: 20px;
  }

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

  .compliance-section {
    align-items: flex-start;
    flex-direction: column;
  }

  .button {
    width: 100%;
  }

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