:root {
  color-scheme: light;
  --color-primary: #2D8B57;
  --color-primary-strong: #237147;
  --color-primary-soft: #E7F4EC;
  --color-accent: #FF8C42;
  --color-accent-strong: #E87421;
  --color-accent-soft: #FFF1E8;
  --color-bg: #FFFFFF;
  --color-surface: #F5FBF7;
  --color-surface-2: #EEF7F1;
  --color-panel: #FFFFFF;
  --color-text: #12312A;
  --color-text-strong: #0B201B;
  --color-muted: #51635C;
  --color-muted-2: #6E817A;
  --color-border: #D7E7DD;
  --color-border-strong: #B8D1C3;
  --color-success: #2D8B57;
  --color-warning: #FF8C42;
  --color-focus: rgba(45, 139, 87, 0.28);
  --shadow-sm: 0 4px 16px rgba(18, 49, 42, 0.06);
  --shadow-md: 0 10px 30px rgba(18, 49, 42, 0.10);
  --shadow-lg: 0 20px 48px rgba(18, 49, 42, 0.14);
  --radius-xs: 4px;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --container: 1280px;
  --container-narrow: 1040px;
  --gutter: 24px;
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;
  --space-10: 40px;
  --space-12: 48px;
  --space-14: 56px;
  --space-16: 64px;
  --space-20: 80px;
  --space-24: 96px;
  --ease-standard: cubic-bezier(0.2, 0.7, 0, 1);
  --transition-fast: 160ms var(--ease-standard);
  --transition-base: 240ms var(--ease-standard);
  --transition-slow: 420ms var(--ease-standard);
  --header-height: 76px;
  --focus-ring: 0 0 0 4px var(--color-focus);
  --grid-gap: clamp(16px, 2vw, 24px);
}

* , *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-width: 320px;
  background: linear-gradient(180deg, #ffffff 0%, #fbfefc 45%, #f7fbf8 100%);
  color: var(--color-text);
  font-family: "Source Han Sans SC", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  line-height: 1.7;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

img, svg, video, canvas { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
p { margin: 0 0 1em; }
h1, h2, h3, h4, h5, h6 { margin: 0; color: var(--color-text-strong); line-height: 1.2; }
small { font-size: 0.875rem; }
button, input, select, textarea { font: inherit; }
::selection { background: rgba(45, 139, 87, 0.18); }

.page-shell {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.skip-link {
  position: absolute;
  left: 16px;
  top: 12px;
  z-index: 1000;
  padding: 10px 14px;
  border-radius: 999px;
  background: var(--color-primary);
  color: #fff;
  transform: translateY(-180%);
  transition: transform var(--transition-base);
}
.skip-link:focus { transform: translateY(0); outline: none; box-shadow: var(--focus-ring); }

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(14px);
  background: rgba(255, 255, 255, 0.84);
  border-bottom: 1px solid rgba(215, 231, 221, 0.82);
  transition: box-shadow var(--transition-base), border-color var(--transition-base), background var(--transition-base);
}
.site-header.is-scrolled { box-shadow: 0 10px 28px rgba(18, 49, 42, 0.06); }
.header-inner, .footer-inner, .page-container {
  width: min(var(--container), calc(100% - 2 * var(--gutter)));
  margin: 0 auto;
}
.header-inner {
  min-height: var(--header-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  min-width: 0;
}
.brand-mark {
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--color-primary) 0%, #4ab174 100%);
  color: #fff;
  font-weight: 700;
  letter-spacing: 0.04em;
  box-shadow: 0 8px 20px rgba(45, 139, 87, 0.24);
}
.brand-text { display: grid; gap: 2px; min-width: 0; }
.brand-name { font-size: 1rem; font-weight: 800; letter-spacing: 0.04em; }
.brand-subtitle { font-size: 0.82rem; color: var(--color-muted); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

.nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border: 1px solid var(--color-border);
  border-radius: 12px;
  background: var(--color-panel);
  color: var(--color-text);
}
.nav-toggle:focus-visible, .nav-link:focus-visible, .btn:focus-visible, .chip:focus-visible, .icon-btn:focus-visible, input:focus-visible, textarea:focus-visible, select:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 8px;
}
.nav-list {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 4px;
  margin: 0;
  padding: 0;
}
.nav-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 14px;
  border-radius: 999px;
  color: var(--color-muted);
  transition: background var(--transition-base), color var(--transition-base), transform var(--transition-base);
}
.nav-link:hover { background: var(--color-surface); color: var(--color-text); transform: translateY(-1px); }
.nav-link.is-active {
  background: var(--color-primary-soft);
  color: var(--color-primary-strong);
  font-weight: 700;
}
.nav-link[aria-current="page"] { background: var(--color-primary-soft); color: var(--color-primary-strong); font-weight: 700; }

.language-switch {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  background: var(--color-panel);
}
.lang-option {
  border: 0;
  background: transparent;
  color: var(--color-muted);
  padding: 8px 12px;
  border-radius: 999px;
  cursor: pointer;
  transition: background var(--transition-base), color var(--transition-base);
}
.lang-option.is-active { background: var(--color-primary); color: #fff; }

main { flex: 1; }
.section {
  padding: var(--space-20) 0;
}
.section.compact { padding: var(--space-16) 0; }
.section-head {
  display: grid;
  gap: 12px;
  margin-bottom: var(--space-10);
  max-width: 820px;
}
.kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--color-primary-strong);
  font-size: 0.92rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.kicker::before {
  content: "";
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--color-accent);
}
.section-title {
  font-size: clamp(1.8rem, 2.8vw, 2.75rem);
  line-height: 1.15;
  overflow-wrap: anywhere;
}
.section-desc {
  color: var(--color-muted);
  font-size: 1.02rem;
  max-width: 70ch;
}

.hero {
  padding: clamp(40px, 6vw, 84px) 0 var(--space-20);
}
.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(320px, 0.85fr);
  gap: clamp(24px, 4vw, 48px);
  align-items: center;
}
.hero-copy {
  display: grid;
  gap: 20px;
}
.hero-title {
  font-size: clamp(2.4rem, 5vw, 4.6rem);
  line-height: 1.05;
  max-width: 12ch;
  overflow-wrap: anywhere;
}
.hero-lead {
  font-size: clamp(1rem, 1.25vw, 1.12rem);
  color: var(--color-muted);
  max-width: 60ch;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}
.hero-points {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.hero-aside {
  display: grid;
  gap: 16px;
}
.hero-panel, .card, .info-panel, .stat-card, .feature-card, .timeline-card, .download-card, .research-card, .map-card, .query-panel, .form-card {
  background: var(--color-panel);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}
.hero-panel {
  padding: clamp(20px, 2.8vw, 28px);
}
.hero-panel-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}
.hero-stat {
  padding: 16px;
  border-radius: var(--radius-md);
  background: linear-gradient(180deg, #fff 0%, #f9fcfa 100%);
  border: 1px solid var(--color-border);
}
.hero-stat-value {
  display: block;
  font-size: clamp(1.5rem, 2vw, 2.1rem);
  font-weight: 800;
  color: var(--color-primary-strong);
}
.hero-stat-label { color: var(--color-muted); font-size: 0.92rem; }
.hero-quote {
  padding: 18px 20px;
  border-left: 4px solid var(--color-accent);
  background: var(--color-accent-soft);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
}

.grid {
  display: grid;
  gap: var(--grid-gap);
}
.grid.two-up { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid.three-up { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid.four-up { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.stack { display: grid; gap: 16px; }

.card, .info-panel, .feature-card, .timeline-card, .download-card, .research-card, .map-card, .query-panel, .form-card {
  padding: 24px;
}
.card:hover, .feature-card:hover, .download-card:hover, .research-card:hover, .timeline-card:hover, .stat-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}
.card, .feature-card, .timeline-card, .download-card, .research-card, .stat-card {
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}
.card-head {
  display: flex;
  align-items: start;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 14px;
}
.card-title { font-size: 1.12rem; }
.card-meta, .meta-list, .inline-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.pill, .tag, .badge, .meta-chip, .status-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 10px;
  border-radius: 999px;
  background: var(--color-surface);
  color: var(--color-muted);
  border: 1px solid var(--color-border);
  font-size: 0.85rem;
}
.tag.primary, .badge.primary, .status-chip.primary { background: var(--color-primary-soft); color: var(--color-primary-strong); border-color: rgba(45,139,87,.18); }
.tag.accent, .badge.accent { background: var(--color-accent-soft); color: var(--color-accent-strong); border-color: rgba(255,140,66,.18); }

.btn, .chip, .download-action, .query-action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border-radius: 10px;
  border: 1px solid transparent;
  padding: 12px 16px;
  cursor: pointer;
  transition: transform var(--transition-base), background var(--transition-base), border-color var(--transition-base), color var(--transition-base), box-shadow var(--transition-base);
}
.btn:hover, .chip:hover, .download-action:hover, .query-action:hover { transform: translateY(-1px); }
.btn-primary, .query-action.primary {
  background: var(--color-primary);
  color: #fff;
  box-shadow: 0 10px 24px rgba(45, 139, 87, 0.18);
}
.btn-primary:hover, .query-action.primary:hover { background: var(--color-primary-strong); }
.btn-secondary, .chip {
  background: var(--color-panel);
  color: var(--color-text);
  border-color: var(--color-border);
}
.btn-secondary:hover, .chip:hover { border-color: var(--color-border-strong); background: var(--color-surface); }
.btn-accent { background: var(--color-accent); color: #fff; }
.btn-accent:hover { background: var(--color-accent-strong); }
.btn-ghost { background: transparent; color: var(--color-primary-strong); border-color: var(--color-border); }
.btn-ghost:hover { background: var(--color-primary-soft); }

.feature-grid { align-items: stretch; }
.feature-card { position: relative; overflow: hidden; }
.feature-card::after {
  content: "";
  position: absolute;
  inset: auto -18px -18px auto;
  width: 88px;
  height: 88px;
  border-radius: 50%;
  background: radial-gradient(circle at 30% 30%, rgba(255, 140, 66, 0.22), rgba(255, 140, 66, 0));
  pointer-events: none;
}
.feature-index {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--color-primary-strong);
}
.feature-title { margin: 8px 0 10px; font-size: 1.1rem; }
.feature-text { color: var(--color-muted); }

.timeline {
  position: relative;
  display: grid;
  gap: 14px;
}
.timeline::before {
  content: "";
  position: absolute;
  left: 18px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(180deg, rgba(45,139,87,.35), rgba(255,140,66,.35));
}
.timeline-item {
  position: relative;
  padding-left: 46px;
}
.timeline-item::before {
  content: "";
  position: absolute;
  left: 10px;
  top: 14px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--color-primary);
  border: 4px solid #fff;
  box-shadow: 0 0 0 1px rgba(45,139,87,.16);
}
.timeline-card { padding: 18px 20px; }
.timeline-title { font-size: 1rem; margin-bottom: 6px; }
.timeline-text { color: var(--color-muted); font-size: 0.95rem; }

.filter-bar, .toolbar, .search-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
}
.search-field, .select-field, .input-field, .textarea-field {
  width: 100%;
  border: 1px solid var(--color-border);
  border-radius: 12px;
  background: #fff;
  color: var(--color-text);
  padding: 12px 14px;
  transition: border-color var(--transition-base), box-shadow var(--transition-base), background var(--transition-base);
}
.search-field::placeholder, .input-field::placeholder, .textarea-field::placeholder { color: var(--color-muted-2); }
.search-field:focus, .select-field:focus, .input-field:focus, .textarea-field:focus {
  outline: none;
  border-color: rgba(45,139,87,.45);
  box-shadow: var(--focus-ring);
}
.form-grid {
  display: grid;
  gap: 14px;
}
.form-grid.two-col { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.form-grid .full { grid-column: 1 / -1; }
.form-note { color: var(--color-muted); font-size: 0.92rem; }

.stats-bar {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}
.stat-card { padding: 20px; }
.stat-value { font-size: clamp(1.6rem, 2.5vw, 2.4rem); font-weight: 800; color: var(--color-primary-strong); }
.stat-label { color: var(--color-muted); margin-top: 6px; }
.stat-support { margin-top: 10px; color: var(--color-muted-2); font-size: 0.92rem; }

.partner-wall, .logo-wall {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 12px;
}
.logo-tile {
  min-height: 72px;
  border-radius: 14px;
  border: 1px dashed var(--color-border-strong);
  display: grid;
  place-items: center;
  color: var(--color-muted);
  background: linear-gradient(180deg, #fff 0%, #f8fcf9 100%);
}

.split-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 360px;
  gap: var(--grid-gap);
  align-items: start;
}
.aside-stack { display: grid; gap: 16px; }

.footer {
  margin-top: auto;
  padding: var(--space-20) 0 var(--space-12);
  background: linear-gradient(180deg, rgba(245, 251, 247, 0.4), rgba(231, 244, 236, 0.96));
  border-top: 1px solid rgba(215, 231, 221, 0.92);
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.3fr 1fr 1fr 1fr;
  gap: 24px;
}
.footer-title { font-size: 1rem; margin-bottom: 12px; }
.footer-links { display: grid; gap: 10px; }
.footer-links a { color: var(--color-muted); }
.footer-links a:hover { color: var(--color-primary-strong); }
.footer-brand-desc { color: var(--color-muted); max-width: 42ch; }
.footer-contact {
  display: grid;
  gap: 10px;
  color: var(--color-muted);
}
.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  margin-top: 24px;
  padding-top: 18px;
  border-top: 1px solid rgba(215, 231, 221, 0.88);
  color: var(--color-muted);
  font-size: 0.92rem;
}

[data-reveal] {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s var(--ease-standard), transform 0.6s var(--ease-standard);
}
[data-reveal].is-visible { opacity: 1; transform: translateY(0); }

@media (max-width: 1200px) {
  .grid.four-up, .partner-wall, .logo-wall, .stats-bar, .footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .split-layout { grid-template-columns: 1fr; }
}

@media (max-width: 1100px) {
  .hero-grid { grid-template-columns: 1fr; }
  .hero-title { max-width: 14ch; }
}

@media (max-width: 1024px) {
  .grid.three-up, .grid.two-up { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 768px) {
  :root { --gutter: 16px; --header-height: 68px; }
  .site-nav {
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    padding: 12px 16px 16px;
    background: rgba(255,255,255,0.98);
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-sm);
    display: none;
  }
  .site-nav.is-open { display: block; }
  .nav-list { flex-direction: column; align-items: stretch; }
  .nav-link { width: 100%; justify-content: flex-start; }
  .nav-toggle { display: inline-flex; }
  .language-switch { margin-left: auto; }
  .header-inner { position: relative; gap: 12px; }
  .hero { padding-top: 28px; }
  .hero-panel-grid, .grid.two-up, .grid.three-up, .grid.four-up, .stats-bar, .partner-wall, .logo-wall, .footer-grid, .form-grid.two-col { grid-template-columns: 1fr; }
  .section { padding: var(--space-16) 0; }
  .hero-actions, .filter-bar, .toolbar, .search-row { flex-direction: column; align-items: stretch; }
  .btn, .chip, .query-action, .download-action { width: 100%; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 480px) {
  .brand-subtitle { display: none; }
  .hero-title { font-size: clamp(2rem, 12vw, 2.9rem); }
  .section-title { font-size: clamp(1.5rem, 8vw, 2rem); }
  .card, .feature-card, .timeline-card, .download-card, .research-card, .map-card, .query-panel, .form-card, .hero-panel { padding: 18px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; animation: none !important; transition-duration: 0.01ms !important; }
  [data-reveal] { opacity: 1; transform: none; }
}