:root {
  --bg: #f5fff8;
  --paper: #ffffff;
  --text: #0e2b1c;
  --muted: #4f6b5c;
  --primary: #0f9d58;
  --primary-dark: #0b6f3f;
  --primary-soft: #e0f7ea;
  --line: #d4efde;
  --radius: 16px;
  --shadow: 0 16px 38px rgba(20, 107, 62, 0.13);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  font-family: "Source Han Sans SC", "PingFang SC", "Noto Sans CJK SC", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
}

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

.container {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(8px);
  background: rgba(245, 255, 248, 0.85);
  border-bottom: 1px solid var(--line);
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
}

.brand-mark {
  width: 34px;
  height: 34px;
  border-radius: 10px;
  display: grid;
  place-items: center;
  color: #fff;
  background: linear-gradient(150deg, var(--primary), #21c06f);
}

.nav {
  display: flex;
  gap: 22px;
  color: var(--muted);
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 20px;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--primary), #18b966);
  color: #fff;
  font-weight: 600;
  box-shadow: 0 10px 20px rgba(15, 157, 88, 0.24);
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-sm {
  padding: 10px 16px;
  font-size: 14px;
}

.btn-ghost {
  background: transparent;
  color: var(--primary-dark);
  border: 1px solid var(--line);
  box-shadow: none;
}

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

.hero {
  position: relative;
  overflow: hidden;
  padding: 88px 0 60px;
}

.hero-bg {
  position: absolute;
  inset: -10% -30% auto auto;
  width: 680px;
  height: 680px;
  border-radius: 50%;
  background:
    radial-gradient(circle at 30% 30%, rgba(33, 192, 111, 0.35), transparent 54%),
    radial-gradient(circle at 65% 65%, rgba(15, 157, 88, 0.24), transparent 60%);
  pointer-events: none;
}

.hero-grid {
  position: relative;
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 28px;
  align-items: stretch;
}

.tag,
.section-tag {
  width: fit-content;
  margin: 0 0 12px;
  padding: 6px 12px;
  border-radius: 999px;
  background: var(--primary-soft);
  color: var(--primary-dark);
  font-weight: 600;
  font-size: 14px;
}

h1 {
  margin: 0;
  line-height: 1.16;
  font-size: clamp(34px, 5vw, 58px);
}

.lead {
  margin: 18px 0 26px;
  color: var(--muted);
  font-size: 18px;
  max-width: 580px;
}

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

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.hero-metrics {
  margin-top: 32px;
  display: grid;
  gap: 14px;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.hero-metrics article {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 14px;
}

.metric-value {
  margin: 0;
  font-size: 26px;
  line-height: 1.15;
  font-weight: 700;
  color: var(--primary-dark);
}

.metric-label {
  margin: 6px 0 0;
  color: var(--muted);
  font-size: 14px;
}

.hero-card {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 30px;
  box-shadow: var(--shadow);
}

.hero-card h2 {
  margin-top: 0;
  margin-bottom: 16px;
  font-size: 24px;
}

.hero-card ul {
  margin: 0;
  padding-left: 20px;
  color: var(--muted);
}

.hero-card li + li {
  margin-top: 10px;
}

.section {
  padding: 72px 0;
}

.section-soft {
  background: linear-gradient(180deg, #eefff5 0%, #f6fff9 100%);
}

.section h2 {
  margin: 0 0 20px;
  font-size: clamp(26px, 4vw, 40px);
}

.cards {
  display: grid;
  gap: 16px;
}

.cards.three {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.card {
  padding: 22px;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: #fff;
}

.card h3 {
  margin: 0 0 8px;
}

.card p {
  margin: 0;
  color: var(--muted);
}

.network-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 26px;
  align-items: center;
}

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

.chips {
  margin-top: 18px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.chips span {
  border: 1px solid #b8e7ca;
  background: #f7fffa;
  color: #266343;
  border-radius: 999px;
  padding: 8px 12px;
  font-size: 14px;
}

.map-mock {
  position: relative;
  min-height: 320px;
  border-radius: 18px;
  border: 1px solid #b9e6c9;
  background:
    radial-gradient(circle at 20% 30%, rgba(15, 157, 88, 0.13), transparent 45%),
    radial-gradient(circle at 76% 56%, rgba(33, 192, 111, 0.22), transparent 42%),
    #f6fff9;
}

.dot {
  position: absolute;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--primary);
  box-shadow: 0 0 0 8px rgba(15, 157, 88, 0.16);
}

.d1 { top: 20%; left: 24%; }
.d2 { top: 38%; left: 58%; }
.d3 { top: 62%; left: 42%; }
.d4 { top: 48%; left: 80%; }
.d5 { top: 76%; left: 18%; }

.steps .step {
  margin-bottom: 8px;
  color: var(--primary);
  font-weight: 700;
}

.quote {
  padding-top: 36px;
}

blockquote {
  margin: 0;
  padding: 22px;
  border-left: 6px solid var(--primary);
  background: #f0fff6;
  border-radius: 12px;
  font-size: 20px;
  line-height: 1.5;
}

.quote p {
  margin: 10px 0 0;
  color: var(--muted);
}

.faq-list {
  display: grid;
  gap: 12px;
}

details {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 14px 18px;
}

summary {
  cursor: pointer;
  font-weight: 600;
}

details p {
  margin: 10px 0 0;
  color: var(--muted);
}

.cta {
  padding: 84px 0;
}

.cta-wrap {
  text-align: center;
  background: linear-gradient(150deg, var(--primary-dark), var(--primary));
  color: #fff;
  border-radius: 22px;
  padding: clamp(34px, 5vw, 58px) 20px;
  box-shadow: 0 20px 40px rgba(11, 111, 63, 0.28);
}

.cta-wrap h2 {
  margin: 0 0 8px;
}

.cta-wrap p {
  margin: 0 0 18px;
  opacity: 0.9;
}

.site-footer {
  border-top: 1px solid var(--line);
  padding: 20px 0 30px;
}

.footer-wrap {
  display: flex;
  justify-content: space-between;
  gap: 14px;
  flex-wrap: wrap;
  color: #5f7c6d;
}

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

  .hero {
    padding-top: 64px;
  }

  .hero-card {
    padding: 24px;
  }

  .hero-metrics {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (max-width: 760px) {
  .nav {
    display: none;
  }

  .container {
    width: min(1120px, calc(100% - 28px));
  }

  .section {
    padding: 56px 0;
  }

  .hero-metrics {
    grid-template-columns: 1fr;
  }

  blockquote {
    font-size: 18px;
  }

  .footer-wrap {
    flex-direction: column;
    gap: 4px;
  }
}