:root {
  --bg: #f7f8f5;
  --panel: #ffffff;
  --ink: #17201b;
  --muted: #5d6b63;
  --line: #dfe6df;
  --green: #247a4b;
  --green-2: #dff2e7;
  --blue: #245b7a;
  --amber: #8a6428;
  --max: 1120px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.7;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(247, 248, 245, 0.92);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(14px);
}

.nav {
  max-width: var(--max);
  margin: 0 auto;
  padding: 14px 22px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  letter-spacing: 0;
}

.brand-logo {
  width: 46px;
  height: 46px;
  object-fit: contain;
  border-radius: 8px;
  background: #fff;
  border: 1px solid var(--line);
}

.brand-mark {
  width: 34px;
  height: 34px;
  border-radius: 8px;
  display: grid;
  place-items: center;
  color: #fff;
  background: linear-gradient(135deg, var(--green), var(--blue));
  font-size: 15px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 18px;
  color: var(--muted);
  font-size: 14px;
}

.nav-links a:hover { color: var(--green); }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 18px;
  border-radius: 8px;
  border: 1px solid var(--green);
  background: var(--green);
  color: #fff;
  font-weight: 700;
}

.btn.secondary {
  background: transparent;
  color: var(--green);
}

.hero {
  max-width: var(--max);
  margin: 0 auto;
  padding: 72px 22px 44px;
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(320px, 0.92fr);
  gap: 42px;
  align-items: center;
}

.eyebrow {
  color: var(--green);
  font-weight: 800;
  font-size: 14px;
  margin-bottom: 12px;
}

h1, h2, h3 { line-height: 1.2; margin: 0; letter-spacing: 0; }

h1 {
  font-size: clamp(38px, 6vw, 66px);
  max-width: 760px;
}

h2 { font-size: clamp(28px, 4vw, 42px); }

h3 { font-size: 20px; }

p { margin: 0; }

.lead {
  margin-top: 22px;
  font-size: 18px;
  color: var(--muted);
  max-width: 720px;
}

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

.hero-visual {
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 8px;
  padding: 20px;
  box-shadow: 0 24px 70px rgba(23, 32, 27, 0.08);
}

.system-map {
  display: grid;
  gap: 12px;
}

.map-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.map-node {
  min-height: 86px;
  border-radius: 8px;
  padding: 14px;
  border: 1px solid var(--line);
  background: #fbfcfa;
}

.map-node strong {
  display: block;
  margin-bottom: 5px;
}

.map-node span {
  color: var(--muted);
  font-size: 13px;
}

.map-node.primary {
  background: var(--green-2);
  border-color: #b9dec9;
}

section {
  max-width: var(--max);
  margin: 0 auto;
  padding: 56px 22px;
}

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

.section-head p {
  color: var(--muted);
  max-width: 620px;
}

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

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

.card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 22px;
}

.article-card {
  display: flex;
  flex-direction: column;
  gap: 12px;
  min-height: 238px;
  transition: border-color 0.2s, transform 0.2s, box-shadow 0.2s;
}

.article-card:hover {
  border-color: #b9dec9;
  transform: translateY(-2px);
  box-shadow: 0 16px 38px rgba(23, 32, 27, 0.08);
}

.article-card .read-more {
  margin-top: auto;
  color: var(--green);
  font-weight: 800;
}

.card p, .article-body p, .article-body li { color: var(--muted); }

.tag {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  padding: 4px 10px;
  border-radius: 999px;
  background: var(--green-2);
  color: var(--green);
  font-size: 13px;
  font-weight: 700;
}

.case-band {
  background: #14231b;
  color: #fff;
  max-width: none;
  padding-left: 0;
  padding-right: 0;
}

.case-inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 22px;
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 34px;
  align-items: center;
}

.case-band p { color: #cbd8d0; }

.timeline {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 10px;
}

.step {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 16px;
  min-height: 118px;
}

.step b {
  display: block;
  color: var(--green);
  margin-bottom: 8px;
}

.article-shell {
  max-width: 860px;
  margin: 0 auto;
  padding: 56px 22px;
}

.article-meta {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin: 12px 0 24px;
  color: var(--muted);
  font-size: 14px;
}

.article-body {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 30px;
}

.article-body h2 { font-size: 26px; margin: 30px 0 12px; }
.article-body h3 { margin: 24px 0 8px; }
.article-body ul, .article-body ol { padding-left: 22px; }

.cta {
  background: var(--green-2);
  border: 1px solid #b9dec9;
  border-radius: 8px;
  padding: 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}

.contact-panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 210px;
  gap: 22px;
  align-items: center;
  width: 100%;
}

.contact-methods {
  display: grid;
  gap: 12px;
}

.contact-line {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--muted);
}

.contact-line strong {
  color: var(--ink);
  font-size: 20px;
}

.qr-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 12px;
  text-align: center;
}

.qr-card img {
  width: 100%;
  max-width: 180px;
  border-radius: 8px;
  display: block;
  margin: 0 auto 8px;
}

.qr-card span {
  color: var(--muted);
  font-size: 13px;
}

.footer {
  border-top: 1px solid var(--line);
  padding: 28px 22px;
  color: var(--muted);
  text-align: center;
}

@media (max-width: 860px) {
  .hero, .case-inner { grid-template-columns: 1fr; }
  .grid, .grid.two, .timeline { grid-template-columns: 1fr; }
  .section-head, .cta { align-items: start; flex-direction: column; }
  .contact-panel { grid-template-columns: 1fr; }
  .nav { align-items: start; }
  .nav-links { display: none; }
}