:root {
  --bg: #f6fbfa;
  --panel: #ffffff;
  --ink: #14211f;
  --muted: #637874;
  --line: #dcece8;
  --teal: #10a88f;
  --teal-dark: #087c6b;
  --cyan: #4cc8d9;
  --warm: #ffb84d;
  --soft: #e8f8f4;
  --shadow: 0 18px 48px rgba(13, 76, 68, .12);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: -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: 20;
  display: flex;
  align-items: center;
  gap: 28px;
  padding: 14px 40px;
  background: rgba(246, 251, 250, .9);
  border-bottom: 1px solid rgba(220, 236, 232, .85);
  backdrop-filter: blur(14px);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 260px;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--teal), var(--cyan));
  color: #fff;
  font-weight: 800;
}

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

.brand small {
  color: var(--muted);
  font-size: 12px;
}

.nav {
  display: flex;
  align-items: center;
  gap: 22px;
  margin-left: auto;
  color: #405854;
  font-size: 14px;
}

.nav a:hover {
  color: var(--teal-dark);
}

.header-cta,
.primary-btn,
.secondary-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  border-radius: 8px;
  padding: 0 18px;
  font-weight: 700;
}

.header-cta,
.primary-btn {
  background: var(--teal);
  color: #fff;
}

.secondary-btn {
  color: var(--teal-dark);
  background: #fff;
  border: 1px solid var(--line);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(420px, 52%);
  min-height: calc(100vh - 72px);
  padding: 78px 40px 54px;
  gap: 34px;
  align-items: center;
  overflow: hidden;
}

.hero-copy {
  max-width: 650px;
}

.eyebrow,
.section-kicker {
  margin: 0 0 12px;
  color: var(--teal-dark);
  font-weight: 800;
  letter-spacing: 0;
}

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

h1 {
  margin-bottom: 22px;
  font-size: clamp(48px, 8vw, 92px);
  line-height: .98;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 14px;
  font-size: 34px;
  line-height: 1.2;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 8px;
  font-size: 20px;
}

.hero-text {
  max-width: 560px;
  color: #405854;
  font-size: 19px;
}

.hero-actions,
.download-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 28px;
}

.hero-metrics {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 30px;
}

.hero-metrics span {
  display: flex;
  flex-direction: column;
  min-width: 120px;
  padding: 12px 14px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.hero-metrics b {
  color: var(--teal-dark);
}

.hero-media {
  min-height: 470px;
  border-radius: 18px;
  overflow: hidden;
  box-shadow: var(--shadow);
}

.hero-media img {
  display: block;
  width: 100%;
  height: 100%;
  min-height: 470px;
  object-fit: cover;
}

.section,
.benefits,
.download,
.site-footer {
  padding: 72px 40px;
}

.intro-band,
.download,
.benefits {
  display: grid;
  grid-template-columns: minmax(0, .86fr) minmax(320px, 1fr);
  gap: 32px;
  align-items: center;
  background: #fff;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.intro-band p,
.benefit-copy p,
.download p,
.compliance p,
.feature-card p,
.scene-list span,
.site-footer p {
  color: var(--muted);
}

.section-title {
  max-width: 720px;
  margin-bottom: 28px;
}

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

.feature-card {
  min-height: 230px;
  padding: 24px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.icon {
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  margin-bottom: 18px;
  border-radius: 10px;
  background: var(--soft);
  color: var(--teal-dark);
  font-weight: 800;
}

.benefits {
  background: linear-gradient(135deg, #e5f8f3, #f8fffd);
}

.benefit-steps {
  display: grid;
  gap: 12px;
}

.benefit-steps div {
  display: grid;
  grid-template-columns: 44px 1fr;
  gap: 0 14px;
  padding: 18px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.benefit-steps span {
  grid-row: span 2;
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--teal);
  color: #fff;
  font-weight: 800;
}

.benefit-steps p {
  margin-bottom: 0;
  color: var(--muted);
}

.scene-list {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
}

.scene-list div {
  padding: 20px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.scene-list b,
.scene-list span {
  display: block;
}

.compliance {
  background: #13211f;
  color: #fff;
}

.compliance .section-kicker {
  color: #7be1cf;
}

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

.compliance-grid p {
  padding: 20px;
  background: rgba(255, 255, 255, .08);
  border: 1px solid rgba(255, 255, 255, .12);
  border-radius: 8px;
  color: rgba(255, 255, 255, .76);
}

.site-footer {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 26px;
  background: #fff;
  border-top: 1px solid var(--line);
}

.site-footer a {
  color: var(--teal-dark);
}

.copyright {
  font-size: 13px;
}

@media (max-width: 960px) {
  .site-header {
    align-items: flex-start;
    flex-wrap: wrap;
    padding: 12px 18px;
  }

  .nav {
    order: 3;
    width: 100%;
    overflow-x: auto;
    gap: 16px;
  }

  .header-cta {
    margin-left: auto;
  }

  .hero,
  .intro-band,
  .benefits,
  .download,
  .site-footer {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
    padding: 48px 18px 28px;
  }

  .section,
  .benefits,
  .download,
  .site-footer {
    padding: 48px 18px;
  }

  .hero-media,
  .hero-media img {
    min-height: 300px;
  }

  .feature-grid,
  .scene-list,
  .compliance-grid {
    grid-template-columns: 1fr;
  }

  h1 {
    font-size: 52px;
  }

  h2 {
    font-size: 28px;
  }
}