:root {
  --bg: #ffffff;
  --surface: #f5fbf8;
  --surface-strong: #eaf7f1;
  --ink: #13231f;
  --muted: #5d706b;
  --line: #dce9e4;
  --primary: #22b889;
  --primary-dark: #0e765e;
  --accent: #ffb84d;
  --shadow: 0 18px 45px rgba(23, 77, 62, 0.12);
}

* {
  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", Arial, sans-serif;
  line-height: 1.7;
}

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: 32px;
  min-height: 72px;
  padding: 0 7vw;
  background: rgba(255, 255, 255, 0.92);
  border-bottom: 1px solid rgba(220, 233, 228, 0.9);
  backdrop-filter: blur(14px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-size: 20px;
  font-weight: 800;
  white-space: nowrap;
}

.brand-logo {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  box-shadow: 0 8px 20px rgba(34, 184, 137, 0.18);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.site-nav a {
  padding: 8px 14px;
  border-radius: 999px;
  color: var(--muted);
  font-size: 15px;
  font-weight: 650;
}

.site-nav a:hover,
.site-nav a.active {
  color: var(--primary-dark);
  background: var(--surface-strong);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(300px, 0.9fr);
  align-items: center;
  gap: 48px;
  min-height: calc(100vh - 72px);
  padding: 72px 7vw 88px;
  background:
    radial-gradient(circle at 84% 18%, rgba(34, 184, 137, 0.18), transparent 28%),
    linear-gradient(180deg, #ffffff 0%, #f6fbf8 100%);
}

.hero h1,
.page-hero h1,
.agreement h1 {
  margin: 0;
  font-size: clamp(40px, 6vw, 72px);
  line-height: 1.08;
  letter-spacing: 0;
}

.lead {
  max-width: 620px;
  margin: 24px 0 0;
  font-size: 20px;
  color: var(--muted);
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 22px;
  border-radius: 8px;
  font-weight: 750;
  border: 1px solid transparent;
}

.btn-primary {
  color: #fff;
  background: var(--primary-dark);
  box-shadow: 0 12px 28px rgba(14, 118, 94, 0.2);
}

.btn-secondary {
  color: var(--primary-dark);
  background: #fff;
  border-color: var(--line);
}

.phone-preview {
  display: flex;
  justify-content: center;
}

.phone-shell {
  width: min(330px, 86vw);
  min-height: 610px;
  padding: 28px 22px;
  border: 10px solid #172b26;
  border-radius: 38px;
  background: linear-gradient(180deg, #fbfffd 0%, #edf8f3 100%);
  box-shadow: var(--shadow);
}

.phone-status {
  width: 82px;
  height: 7px;
  margin: 0 auto 28px;
  border-radius: 999px;
  background: #1f302c;
}

.app-card,
.app-row {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 10px 22px rgba(34, 98, 77, 0.08);
}

.app-card-main {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 28px;
  background: linear-gradient(145deg, var(--primary) 0%, #7de4ba 100%);
  color: #0b3b30;
}

.app-card-main span,
.app-card-main small {
  font-weight: 700;
}

.app-card-main strong {
  font-size: 52px;
  line-height: 1;
}

.app-row {
  display: flex;
  justify-content: space-between;
  gap: 14px;
  margin-top: 16px;
  padding: 18px;
  color: var(--muted);
}

.app-row b {
  color: var(--ink);
}

.section {
  padding: 82px 7vw;
}

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

.section h2,
.showcase-card h2,
.agreement h2 {
  margin: 0 0 12px;
  font-size: clamp(28px, 3vw, 42px);
  line-height: 1.22;
}

.section-head p,
.section p,
.page-hero p,
.agreement p {
  color: var(--muted);
}

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

.feature-card,
.compliance-grid article,
.showcase-card,
.info-panel {
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  box-shadow: 0 10px 28px rgba(33, 91, 73, 0.07);
}

.feature-card h3,
.compliance-grid h3 {
  margin: 14px 0 8px;
  font-size: 20px;
}

.feature-card p,
.compliance-grid p,
.compliance-grid small,
.showcase-card p {
  margin: 0;
  color: var(--muted);
}

.feature-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: 8px;
  color: var(--primary-dark);
  background: var(--surface-strong);
  font-weight: 800;
}

.split-section {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 420px);
  gap: 34px;
  align-items: start;
  background: var(--surface);
}

.info-panel dl,
.info-panel dd {
  margin: 0;
}

.info-panel div + div {
  margin-top: 20px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
}

.info-panel dt {
  color: var(--muted);
  font-size: 14px;
}

.info-panel dd {
  margin-top: 4px;
  font-weight: 750;
}

.compliance {
  background: linear-gradient(180deg, #fff 0%, #f7fbf9 100%);
}

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

.compliance-grid a {
  display: inline-flex;
  margin-top: 16px;
  color: var(--primary-dark);
  font-weight: 800;
}

.page-hero {
  padding: 88px 7vw 48px;
  background: var(--surface);
}

.page-hero p {
  max-width: 760px;
  margin: 18px 0 0;
  font-size: 19px;
}

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

.showcase-card {
  min-height: 180px;
}

.agreement {
  max-width: 920px;
  margin: 0 auto;
  padding: 82px 7vw;
}

.agreement h2 {
  margin-top: 34px;
  font-size: 26px;
}

.muted {
  color: var(--muted);
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  padding: 34px 7vw;
  color: var(--muted);
  background: #10231e;
}

.site-footer strong {
  color: #fff;
}

.site-footer p {
  margin: 6px 0 0;
}

.footer-links {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 16px;
  flex-wrap: wrap;
}

.footer-links a,
.footer-links span {
  color: #d9ebe5;
}

@media (max-width: 920px) {
  .site-header {
    align-items: flex-start;
    flex-direction: column;
    gap: 12px;
    padding-top: 14px;
    padding-bottom: 14px;
  }

  .site-nav {
    justify-content: flex-start;
  }

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

  .hero {
    min-height: auto;
    padding-top: 54px;
  }

  .feature-grid,
  .compliance-grid,
  .product-showcase {
    grid-template-columns: 1fr;
  }

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

  .footer-links {
    justify-content: flex-start;
  }
}

@media (max-width: 560px) {
  .site-nav a {
    padding: 6px 10px;
    font-size: 14px;
  }

  .lead {
    font-size: 17px;
  }

  .section,
  .agreement {
    padding-top: 56px;
    padding-bottom: 56px;
  }

  .phone-shell {
    min-height: 520px;
  }
}