:root {
  --color-primary: #2D8B57;
  --color-primary-strong: #246F46;
  --color-primary-soft: #E6F3EC;
  --color-accent: #FF8C42;
  --color-accent-strong: #E8752D;
  --color-bg: #F8F9F4;
  --color-surface: #FFFFFF;
  --color-surface-soft: #F5FBF7;
  --color-text: #1A1A1A;
  --color-text-muted: #666666;
  --color-text-soft: #51635C;
  --color-border: #E8EDE0;
  --color-border-strong: #D7E7DD;
  --color-success: #2F855A;
  --color-warning: #C58A12;
  --color-info: #2B6CB0;
  --color-error: #B83232;
  --shadow-sm: 0 4px 16px rgba(25, 50, 38, 0.06);
  --shadow-md: 0 12px 32px rgba(25, 50, 38, 0.1);
  --shadow-lg: 0 20px 48px rgba(25, 50, 38, 0.12);
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --container: 1280px;
  --container-narrow: 1080px;
  --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-16: 64px;
  --space-20: 80px;
  --transition-fast: 160ms ease;
  --transition-base: 220ms ease;
  --transition-slow: 420ms ease;
  --focus-ring: 0 0 0 4px rgba(45, 139, 87, 0.18);
  color-scheme: light;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: "Source Han Sans SC", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  background: linear-gradient(180deg, #fbfcf8 0%, var(--color-bg) 100%);
  color: var(--color-text);
  line-height: 1.7;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
a:hover { color: var(--color-primary-strong); }
button, input, textarea, select { font: inherit; }

.skip-link {
  position: absolute;
  left: 16px;
  top: -48px;
  z-index: 1000;
  padding: 10px 14px;
  border-radius: var(--radius-md);
  background: var(--color-primary);
  color: #fff;
  transition: top var(--transition-fast);
}
.skip-link:focus { top: 16px; outline: none; box-shadow: var(--focus-ring); }

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(14px);
  background: rgba(248, 249, 244, 0.84);
  border-bottom: 1px solid rgba(232, 237, 224, 0.9);
}
.site-header__inner,
.site-footer__inner,
.container {
  width: min(calc(100% - 32px), var(--container));
  margin-inline: auto;
}
.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
  min-height: 84px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}
.brand__logo,
.brand__mark {
  width: 44px;
  height: 44px;
  border-radius: 14px;
  flex: 0 0 auto;
}
.brand__logo {
  object-fit: cover;
  box-shadow: 0 10px 18px rgba(45, 139, 87, 0.18);
  background: #fff;
}
.brand__mark {
  display: grid;
  place-items: center;
  color: #fff;
  background: linear-gradient(135deg, var(--color-primary) 0%, #3ea56d 100%);
  box-shadow: 0 10px 18px rgba(45, 139, 87, 0.18);
  font-family: "DM Sans", sans-serif;
  font-weight: 700;
  letter-spacing: 0.08em;
}
.brand__text { min-width: 0; }
.brand__name {
  display: block;
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: 0.04em;
}
.brand__tag {
  display: block;
  color: var(--color-text-soft);
  font-size: 0.82rem;
}

.nav-toggle { display: none; }
.site-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  flex-wrap: wrap;
  justify-content: center;
}
.site-nav__link {
  padding: 10px 13px;
  border-radius: 999px;
  color: var(--color-text-soft);
  transition: background var(--transition-base), color var(--transition-base), transform var(--transition-base);
}
.site-nav__link:hover,
.site-nav__link:focus-visible {
  background: rgba(45, 139, 87, 0.08);
  color: var(--color-primary-strong);
  outline: none;
}
.site-nav__link.is-active {
  color: var(--color-primary-strong);
  background: rgba(45, 139, 87, 0.12);
  box-shadow: inset 0 0 0 1px rgba(45, 139, 87, 0.12);
}
.site-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}
.lang-switch {
  display: inline-flex;
  align-items: center;
  padding: 4px;
  border: 1px solid var(--color-border);
  background: rgba(255,255,255,0.76);
  border-radius: 999px;
}
.lang-switch__button {
  border: 0;
  background: transparent;
  color: var(--color-text-soft);
  padding: 8px 12px;
  border-radius: 999px;
  cursor: pointer;
  transition: background var(--transition-base), color var(--transition-base);
}
.lang-switch__button.is-active {
  color: #fff;
  background: var(--color-primary);
}

.button,
.form button,
.download-card__action,
.pill,
.tag {
  border-radius: var(--radius-md);
}
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 18px;
  border: 1px solid transparent;
  font-weight: 600;
  cursor: pointer;
  transition: transform var(--transition-base), background var(--transition-base), border-color var(--transition-base), box-shadow var(--transition-base), color var(--transition-base);
}
.button:hover { transform: translateY(-1px); }
.button:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible,
summary:focus-visible,
.lang-switch__button:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}
.button--primary {
  background: var(--color-primary);
  color: #fff;
  box-shadow: 0 10px 18px rgba(45, 139, 87, 0.18);
}
.button--primary:hover { background: var(--color-primary-strong); color: #fff; }
.button--secondary {
  background: rgba(255,255,255,0.82);
  border-color: var(--color-border-strong);
  color: var(--color-text);
}
.button--secondary:hover { background: #fff; border-color: var(--color-primary); }
.button--accent {
  background: var(--color-accent);
  color: #fff;
}
.button--accent:hover { background: var(--color-accent-strong); color: #fff; }
.button--ghost {
  background: transparent;
  border-color: var(--color-border-strong);
  color: var(--color-text);
}

main { display: block; }
.page-hero,
.section,
.band,
.contact-panel,
.download-panel,
.inset-panel {
  position: relative;
}
.page-hero {
  padding: 72px 0 36px;
}
.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(320px, 0.8fr);
  gap: var(--space-10);
  align-items: start;
}
.hero-copy {
  padding-top: 10px;
}
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  border-radius: 999px;
  background: rgba(45, 139, 87, 0.1);
  color: var(--color-primary-strong);
  font-size: 0.88rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}
.hero-title,
.section-title {
  margin: 0;
  color: #143127;
  overflow-wrap: anywhere;
}
.hero-title {
  margin-top: 18px;
  max-width: 12ch;
  font-size: clamp(2.6rem, 5vw, 4.9rem);
  line-height: 1.08;
  letter-spacing: -0.02em;
}
.hero-summary {
  margin: 20px 0 0;
  max-width: 60ch;
  color: var(--color-text-soft);
  font-size: 1.04rem;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}
.hero-notes {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}
.hero-note {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  background: rgba(255,255,255,0.72);
  border: 1px solid var(--color-border);
  border-radius: 999px;
  color: var(--color-text-soft);
  box-shadow: var(--shadow-sm);
}
.hero-panel {
  display: grid;
  gap: 16px;
}
.stat-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}
.stat-card,
.feature-card,
.list-card,
.info-card,
.timeline-card,
.download-card,
.map-card,
.query-card,
.quote-card,
.research-card,
.article-card,
.team-card,
.advocacy-card,
.filter-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}
.stat-card {
  padding: 22px;
}
.stat-card__value {
  display: block;
  font-family: "DM Sans", sans-serif;
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-primary-strong);
}
.stat-card__label {
  display: block;
  margin-top: 8px;
  color: var(--color-text-soft);
}

.section { padding: 72px 0; }
.section--soft { background: linear-gradient(180deg, rgba(255,255,255,0.18), rgba(245,251,247,0.9)); }
.section__header {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: var(--space-8);
  margin-bottom: var(--space-10);
}
.section-title {
  font-size: clamp(1.8rem, 3vw, 2.6rem);
  line-height: 1.2;
}
.section-lead {
  margin: 10px 0 0;
  max-width: 68ch;
  color: var(--color-text-soft);
}
.grid-2 { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 20px; }
.card-pad { padding: 24px; }
.feature-card,
.list-card,
.info-card,
.research-card,
.article-card,
.team-card,
.advocacy-card,
.map-card,
.query-card,
.download-card,
.timeline-card,
.filter-card,
.contact-panel,
.download-panel,
.inset-panel {
  padding: 24px;
}
.card-hover {
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}
.card-hover:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-border-strong);
}
.card-title {
  margin: 0;
  font-size: 1.15rem;
  line-height: 1.35;
}
.card-text {
  margin: 12px 0 0;
  color: var(--color-text-soft);
}
.meta-list,
.bullet-list,
.clean-list,
.link-list,
.footer-links,
.footer-solutions,
.pill-list,
.timeline-list {
  list-style: none;
  margin: 0;
  padding: 0;
}
.meta-list,
.pill-list { display: flex; flex-wrap: wrap; gap: 8px; }
.tag,
.pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 10px;
  background: rgba(45, 139, 87, 0.08);
  color: var(--color-primary-strong);
  font-size: 0.84rem;
}
.tag--accent,
.pill--accent { background: rgba(255, 140, 66, 0.12); color: #9d4b15; }
.tag--neutral,
.pill--neutral { background: rgba(81, 99, 92, 0.08); color: var(--color-text-soft); }

.split-layout { display: grid; grid-template-columns: minmax(0, 0.88fr) minmax(0, 1.12fr); gap: 20px; }
.stacked-layout { display: grid; gap: 20px; }
.panel-muted {
  background: var(--color-surface-soft);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}

.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.filter-chip {
  border: 1px solid var(--color-border-strong);
  background: rgba(255,255,255,0.8);
  color: var(--color-text-soft);
  padding: 9px 14px;
  border-radius: 999px;
  cursor: pointer;
  transition: background var(--transition-base), border-color var(--transition-base), color var(--transition-base);
}
.filter-chip.is-active,
.filter-chip:hover {
  background: rgba(45, 139, 87, 0.1);
  color: var(--color-primary-strong);
  border-color: rgba(45, 139, 87, 0.2);
}

.toc,
.sidebar-card {
  position: sticky;
  top: 104px;
}
.toc {
  padding: 20px;
  border-radius: var(--radius-lg);
  background: rgba(255,255,255,0.78);
  border: 1px solid var(--color-border);
}
.toc a { display: block; padding: 8px 0; color: var(--color-text-soft); }
.toc a:hover { color: var(--color-primary-strong); }

.timeline-list { display: grid; gap: 16px; }
.timeline-item {
  display: grid;
  grid-template-columns: 92px minmax(0, 1fr);
  gap: 16px;
  align-items: start;
}
.timeline-item__time {
  color: var(--color-primary-strong);
  font-weight: 700;
}
.timeline-item__body {
  padding-bottom: 16px;
  border-bottom: 1px solid var(--color-border);
}
.timeline-item:last-child .timeline-item__body { border-bottom: 0; padding-bottom: 0; }

.query-box {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 12px;
}
.input,
.textarea,
.select {
  width: 100%;
  padding: 13px 14px;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border-strong);
  background: #fff;
  color: var(--color-text);
  transition: border-color var(--transition-base), box-shadow var(--transition-base), background var(--transition-base);
}
.input::placeholder,
.textarea::placeholder { color: #9daaa4; }
.textarea { min-height: 148px; resize: vertical; }
.input:focus,
.textarea:focus,
.select:focus { border-color: var(--color-primary); box-shadow: var(--focus-ring); outline: none; }
.form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}
.form-grid .field--full { grid-column: 1 / -1; }
.field label {
  display: block;
  margin-bottom: 8px;
  font-weight: 600;
  color: var(--color-text);
}
.field small,
.helper,
.form-hint {
  display: block;
  margin-top: 8px;
  color: var(--color-text-soft);
  font-size: 0.92rem;
}
.form-status {
  margin-top: 14px;
  padding: 12px 14px;
  border-radius: var(--radius-md);
  background: rgba(45, 139, 87, 0.08);
  color: var(--color-primary-strong);
}
.form-status.is-error { background: rgba(184, 50, 50, 0.08); color: var(--color-error); }

.map-frame {
  border-radius: var(--radius-lg);
  overflow: hidden;
  min-height: 320px;
  background:
    radial-gradient(circle at 22% 26%, rgba(45, 139, 87, 0.18), transparent 22%),
    radial-gradient(circle at 75% 34%, rgba(255, 140, 66, 0.18), transparent 20%),
    linear-gradient(180deg, #fdfefd, #eef6f0);
  border: 1px solid var(--color-border);
}
.map-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 14px;
  padding: 24px;
}
.map-node {
  min-height: 72px;
  border-radius: 999px;
  background: rgba(255,255,255,0.86);
  border: 1px solid rgba(215, 231, 221, 0.9);
  display: grid;
  place-items: center;
  text-align: center;
  color: var(--color-text-soft);
  padding: 12px;
}
.map-node--primary { background: rgba(45, 139, 87, 0.12); color: var(--color-primary-strong); }

.footer {
  margin-top: 80px;
  background: #EDF4EF;
  border-top: 1px solid var(--color-border);
}
.footer__top {
  display: grid;
  grid-template-columns: 1.2fr repeat(3, minmax(0, 1fr));
  gap: 24px;
  padding: 56px 0 28px;
}
.footer__brand {
  max-width: 34ch;
}
.footer__brand p {
  margin: 16px 0 0;
  color: var(--color-text-soft);
}
.footer__title {
  margin: 0 0 12px;
  font-size: 1rem;
}
.footer-links li,
.footer-solutions li { margin-bottom: 10px; }
.footer-links a,
.footer-solutions a { color: var(--color-text-soft); }
.footer-links a:hover,
.footer-solutions a:hover { color: var(--color-primary-strong); }
.footer__bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 0 28px;
  border-top: 1px solid var(--color-border);
  color: var(--color-text-soft);
  font-size: 0.94rem;
}
.footer__cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  border-radius: 999px;
  background: rgba(45, 139, 87, 0.1);
  color: var(--color-primary-strong);
  font-weight: 600;
}

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

@media (max-width: 1200px) {
  .grid-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer__top { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 1100px) {
  .hero-grid,
  .split-layout,
  .section__header,
  .footer__top { grid-template-columns: 1fr; }
  .section__header { display: grid; }
  .hero-grid { gap: 24px; }
  .site-header__inner { flex-wrap: wrap; padding: 14px 0; }
  .site-nav { order: 3; width: 100%; justify-content: flex-start; padding-bottom: 10px; }
  .site-actions { margin-left: auto; }
  .stat-grid,
  .grid-3,
  .grid-2 { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 860px) {
  .page-hero,
  .section { padding: 56px 0; }
  .site-header__inner { gap: 12px; }
  .site-nav { display: none; }
  .site-nav.is-open {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 8px;
    padding: 10px 0 16px;
    width: 100%;
  }
  .nav-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 42px;
    height: 42px;
    border: 1px solid var(--color-border-strong);
    background: #fff;
    border-radius: 999px;
    cursor: pointer;
  }
  .query-box,
  .form-grid,
  .grid-3,
  .grid-4,
  .stat-grid,
  .grid-2 { grid-template-columns: 1fr; }
  .timeline-item { grid-template-columns: 1fr; gap: 6px; }
  .map-grid { grid-template-columns: repeat(6, 1fr); }
  .footer__bottom { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 560px) {
  .site-header__inner,
  .site-header__inner .site-actions { gap: 10px; }
  .site-header__inner { width: min(calc(100% - 24px), var(--container)); }
  .container,
  .site-footer__inner { width: min(calc(100% - 24px), var(--container)); }
  .hero-title { max-width: 100%; }
  .hero-actions,
  .hero-notes,
  .filter-bar { gap: 8px; }
  .button { width: 100%; }
  .hero-note,
  .tag,
  .pill { width: 100%; justify-content: center; }
  .map-grid { grid-template-columns: 1fr 1fr; }
}

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

:where(.sr-only) {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}