:root {
  --color-surface: #f9faf9;
  --color-surface-alt: #f0f1f0;
  --color-surface-deep: #e3e5e3;
  --color-ink: #3f4b3e;
  --color-ink-soft: #607160;
  --color-ink-muted: #778976;
  --color-line: #d8dad7;
  --color-primary: #2e872b;
  --color-primary-ink: #ffffff;
  --color-primary-soft: #ddeadc;
  --color-accent: #45840a;
  --color-accent-ink: #ffffff;
  --color-highlight: #d9e5ce;
  --color-focus: #3e7d03;
  --color-contrast-surface: #1a2919;
  --color-contrast-ink: #e4e7e4;
  --color-contrast-line: #465346;
  --color-contrast-accent: #7cec13;
  --overlay-scrim: linear-gradient(180deg, rgba(26, 41, 25, 0.35) 0%, rgba(26, 41, 25, 0.72) 55%, rgba(26, 41, 25, 0.92) 100%);
  --font-heading: "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", "Source Han Sans SC", sans-serif;
  --font-body: "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", "Source Han Sans SC", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --text-xs: 11.0px;
  --text-sm: 14.7px;
  --text-base: 17px;
  --text-lg: 22.7px;
  --text-xl: 30.2px;
  --text-2xl: 40.3px;
  --text-3xl: 53.7px;
  --text-4xl: 71.5px;
  --text-display: clamp(34px, 6.4vw, 82px);
  --text-figure: clamp(28px, 4.6vw, 59px);
  --weight-heading: 625;
  --weight-body: 400;
  --leading-body: 1.83;
  --leading-heading: 1.19;
  --tracking-heading: -0.005em;
  --radius-sm: 14px;
  --radius-md: 16px;
  --radius-lg: 19px;
  --radius-pill: 999px;
  --border-thin: 1px;
  --border-thick: 1px;
  --shadow-1: 0 6px 18px rgba(63, 75, 62, 0.08);
  --shadow-2: 0 18px 44px rgba(63, 75, 62, 0.14);
  --space-1: 8px;
  --space-2: 16px;
  --space-3: 24px;
  --space-4: 32px;
  --space-6: 48px;
  --space-8: 64px;
  --container: 1240px;
  --measure: 72ch;
  --gutter: 16px;
  --section-y: 81px;
  --section-y-lg: 113px;
}

/* ============ 1. 重置与基础排版 ============ */
*, *::before, *::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-padding-top: 104px;
}

@media (prefers-reduced-motion: no-preference) {
  html { scroll-behavior: smooth; }
}

body {
  margin: 0;
  background-color: var(--color-surface);
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  font-weight: var(--weight-body);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
  margin: 0 0 var(--space-2);
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
}

p { margin: 0 0 var(--space-3); }
p:last-child { margin-bottom: 0; }

ul, ol { margin: 0 0 var(--space-3); padding-inline-start: 1.2em; }
li { margin-bottom: 4px; }
li:last-child { margin-bottom: 0; }

img, svg, video, canvas { display: block; max-width: 100%; }
img { height: auto; }

a { color: var(--color-primary); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }

button { font: inherit; color: inherit; background: none; border: 0; padding: 0; cursor: pointer; }

hr { border: 0; margin: 0; }

strong, b { font-weight: 625; }

::selection { background-color: var(--color-highlight); color: var(--color-ink); }

:focus-visible { outline: 2px solid var(--color-focus); outline-offset: 3px; }

/* ============ 2. 布局原语 ============ */
.shell {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

main { display: block; }
#main-content { scroll-margin-top: 110px; }

.section { padding-block: var(--section-y); }
.section--lg { padding-block: var(--section-y-lg); }
.section--alt { background-color: var(--color-surface-alt); }

.section--tint {
  background-image: linear-gradient(
    180deg,
    color-mix(in srgb, var(--color-primary-soft) 88%, var(--color-surface)) 0%,
    color-mix(in srgb, var(--color-highlight) 72%, var(--color-surface)) 52%,
    var(--color-surface) 100%
  );
}

.section--deck {
  background-color: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
}

.rule {
  height: 0;
  border: 0;
  border-top: var(--border-thin) solid var(--color-line);
}

.deck .rule,
.section--deck .rule { border-top-color: var(--color-contrast-line); }

.grid { display: grid; gap: var(--gutter); }
.grid--12 { grid-template-columns: repeat(12, minmax(0, 1fr)); }
.span-4 { grid-column: span 4; }
.span-6 { grid-column: span 6; }
.span-8 { grid-column: span 8; }
.span-12 { grid-column: span 12; }

/* ============ 3. 文字工具 ============ */
.measure { max-width: var(--measure); }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  margin: 0 0 var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.16em;
  color: var(--color-primary);
}

.eyebrow::before {
  content: "";
  width: 22px;
  height: var(--border-thin);
  background-color: currentColor;
  opacity: 0.65;
}

.section--deck .eyebrow,
.deck .eyebrow { color: var(--color-contrast-accent); }

.section-title {
  font-size: var(--text-2xl);
  margin: 0 0 var(--space-2);
}

.section-lede {
  max-width: var(--measure);
  margin: 0 0 var(--space-3);
  font-size: var(--text-lg);
  line-height: 1.62;
  color: var(--color-ink-soft);
}

.section--deck .section-lede,
.deck .section-lede { color: color-mix(in srgb, var(--color-contrast-ink) 78%, transparent); }

/* ============ 4. 按钮 ============ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-1);
  padding: 11px 22px;
  border: var(--border-thin) solid transparent;
  border-radius: var(--radius-pill);
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  font-weight: 600;
  line-height: 1.2;
  text-decoration: none;
  transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.btn:hover { text-decoration: none; }

.btn--primary {
  background-color: var(--color-primary);
  color: var(--color-primary-ink);
  box-shadow: var(--shadow-1);
}

.btn--primary:hover { background-color: color-mix(in srgb, var(--color-primary) 84%, var(--color-accent)); }

.btn--ghost {
  background-color: transparent;
  color: var(--color-primary);
  border-color: color-mix(in srgb, var(--color-primary) 40%, transparent);
}

.btn--ghost:hover { background-color: color-mix(in srgb, var(--color-primary-soft) 70%, transparent); }

.btn--deck {
  background-color: var(--color-contrast-accent);
  color: var(--color-contrast-surface);
}

.btn--deck:hover { background-color: color-mix(in srgb, var(--color-contrast-accent) 84%, var(--color-contrast-ink)); }

/* ============ 5. 标签 / 筛选 / 卡片 / 数据舱 ============ */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border: var(--border-thin) solid color-mix(in srgb, var(--color-primary) 22%, transparent);
  border-radius: var(--radius-pill);
  background-color: var(--color-primary-soft);
  color: var(--color-primary);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
  line-height: 1.6;
}

.tag--accent {
  background-color: color-mix(in srgb, var(--color-highlight) 82%, var(--color-surface));
  border-color: color-mix(in srgb, var(--color-accent) 32%, transparent);
  color: var(--color-accent);
}

.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1);
  margin: 0 0 var(--space-4);
  padding: var(--space-1);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-pill);
  background-color: var(--color-surface-alt);
}

.chip {
  padding: 8px 18px;
  border: var(--border-thin) solid transparent;
  border-radius: var(--radius-pill);
  background-color: transparent;
  color: var(--color-ink-soft);
  font-size: var(--text-sm);
  line-height: 1.4;
  transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.chip:hover { color: var(--color-ink); background-color: color-mix(in srgb, var(--color-surface-deep) 70%, transparent); }

.chip[aria-pressed="true"] {
  background-color: var(--color-highlight);
  border-color: color-mix(in srgb, var(--color-primary) 36%, transparent);
  color: var(--color-primary);
  font-weight: 600;
}

.card {
  padding: var(--space-4);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-lg);
  background-color: var(--color-surface);
  box-shadow: var(--shadow-1);
  transition: box-shadow 0.24s ease;
}

.card:hover { box-shadow: var(--shadow-2); }

.deck {
  position: relative;
  overflow: hidden;
  padding: var(--space-6) var(--space-4);
  border-radius: var(--radius-lg);
  background-color: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  box-shadow: var(--shadow-2);
}

.deck::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(
    circle at 84% 14%,
    color-mix(in srgb, var(--color-contrast-accent) 15%, transparent) 0%,
    transparent 62%
  );
  pointer-events: none;
}

.deck > * { position: relative; }
.deck h1, .deck h2, .deck h3, .deck h4 { color: var(--color-contrast-ink); }
.deck a { color: var(--color-contrast-accent); }
.deck .card { background-color: color-mix(in srgb, var(--color-contrast-ink) 6%, transparent); border-color: var(--color-contrast-line); box-shadow: none; }

.stat { display: flex; flex-direction: column; gap: 4px; }

.stat-value {
  font-family: var(--font-mono);
  font-size: var(--text-figure);
  font-weight: 500;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--color-accent);
  font-variant-numeric: tabular-nums;
}

.section--deck .stat-value,
.deck .stat-value { color: var(--color-contrast-accent); }

.stat-label {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  color: var(--color-ink-muted);
}

.section--deck .stat-label,
.deck .stat-label { color: color-mix(in srgb, var(--color-contrast-ink) 68%, transparent); }

.orbit-line {
  position: relative;
  height: var(--border-thin);
  margin: var(--space-4) 0;
  background-color: var(--color-line);
}

.orbit-line::after {
  content: "";
  position: absolute;
  top: 50%;
  right: 0;
  width: 7px;
  height: 7px;
  margin-top: -3.5px;
  border-radius: var(--radius-pill);
  background-color: var(--color-accent);
}

.section--deck .orbit-line,
.deck .orbit-line { background-color: var(--color-contrast-line); }
.section--deck .orbit-line::after,
.deck .orbit-line::after { background-color: var(--color-contrast-accent); }

/* ============ 6. 图片容器（展签式） ============ */
.plate {
  position: relative;
  display: block;
  margin: 0;
  overflow: hidden;
  border-radius: var(--radius-lg);
  background-color: var(--color-surface-deep);
}

.plate img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.plate--wide { aspect-ratio: 16 / 9; }
.plate--tall { aspect-ratio: 4 / 5; }

.plate-scrim {
  position: absolute;
  inset: 0;
  background-image: var(--overlay-scrim);
  pointer-events: none;
}

.plate-label {
  position: absolute;
  left: var(--space-2);
  bottom: var(--space-2);
  z-index: 2;
  max-width: calc(100% - var(--space-4));
  padding: 7px 14px;
  border: var(--border-thin) solid color-mix(in srgb, var(--color-contrast-accent) 30%, transparent);
  border-radius: var(--radius-sm);
  background-color: color-mix(in srgb, var(--color-contrast-surface) 82%, transparent);
  color: var(--color-contrast-ink);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
  line-height: 1.5;
}

/* ============ 7. 面包屑 ============ */
.breadcrumb { padding-block: var(--space-3) 0; }

.breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1);
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
}

.breadcrumb-list li { display: flex; align-items: center; gap: var(--space-1); margin: 0; }

.breadcrumb-list li + li::before {
  content: "/";
  color: color-mix(in srgb, var(--color-ink-muted) 60%, transparent);
}

.breadcrumb-list a { color: var(--color-ink-muted); }
.breadcrumb-list a:hover { color: var(--color-primary); }

/* ============ 8. 头部 ============ */
.skip-link {
  position: absolute;
  top: -120px;
  left: var(--space-2);
  z-index: 120;
  padding: 10px 20px;
  border-radius: var(--radius-pill);
  background-color: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  font-size: var(--text-sm);
  transition: top 0.2s ease;
}

.skip-link:focus { top: var(--space-2); text-decoration: none; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 90;
  background-color: color-mix(in srgb, var(--color-surface) 94%, transparent);
  border-bottom: var(--border-thin) solid var(--color-line);
  color: var(--color-ink);
}

@supports (backdrop-filter: blur(2px)) {
  .site-header {
    background-color: color-mix(in srgb, var(--color-surface) 84%, transparent);
    backdrop-filter: blur(14px);
  }
}

.site-header::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: var(--border-thin);
  background-image: linear-gradient(
    90deg,
    var(--color-primary) 0%,
    var(--color-accent) 26%,
    var(--color-primary-soft) 64%,
    var(--color-highlight) 100%
  );
  opacity: 0.8;
}

.header-inner {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  min-height: 76px;
  padding-block: var(--space-1);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  flex: none;
  color: var(--color-ink);
}

.brand:hover { text-decoration: none; }

.brand-mark {
  position: relative;
  flex: none;
  width: 36px;
  height: 36px;
  border: var(--border-thin) solid var(--color-primary);
  border-radius: var(--radius-pill);
  background-image: radial-gradient(
    circle at 32% 26%,
    var(--color-primary-soft) 0%,
    color-mix(in srgb, var(--color-highlight) 62%, transparent) 100%
  );
}

.brand-mark::before {
  content: "";
  position: absolute;
  inset: 9px;
  border: var(--border-thin) solid color-mix(in srgb, var(--color-primary) 45%, transparent);
  border-radius: var(--radius-pill);
}

.brand-mark::after {
  content: "";
  position: absolute;
  top: -4px;
  left: 50%;
  width: 7px;
  height: 7px;
  margin-left: -3.5px;
  border-radius: var(--radius-pill);
  background-color: var(--color-accent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--color-accent) 18%, transparent);
}

.brand-words { display: flex; flex-direction: column; line-height: 1.15; }

.brand-name {
  font-family: var(--font-heading);
  font-size: var(--text-base);
  font-weight: var(--weight-heading);
  letter-spacing: 0.02em;
}

.brand-sub {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.14em;
  color: var(--color-ink-muted);
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: 10px;
  margin-left: auto;
  padding: 9px 16px;
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-pill);
  background-color: var(--color-surface-alt);
  color: var(--color-ink-soft);
  font-size: var(--text-sm);
}

.nav-toggle-bars {
  position: relative;
  display: block;
  width: 16px;
  height: 10px;
}

.nav-toggle-bars::before,
.nav-toggle-bars::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  height: 1.5px;
  border-radius: 2px;
  background-color: currentColor;
  transition: transform 0.22s ease, top 0.22s ease;
}

.nav-toggle-bars::before { top: 0; }
.nav-toggle-bars::after { top: 8px; }

.site-header[data-open] .nav-toggle-bars::before { top: 4px; transform: rotate(45deg); }
.site-header[data-open] .nav-toggle-bars::after { top: 4px; transform: rotate(-45deg); }

.site-nav {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-left: auto;
}

.nav-list {
  display: flex;
  align-items: center;
  margin: 0;
  padding: 0;
  list-style: none;
}

.nav-list > li { display: flex; margin: 0; }
.nav-list > li + li { border-left: var(--border-thin) solid var(--color-line); }

.nav-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  color: var(--color-ink-soft);
  font-size: var(--text-sm);
  transition: color 0.18s ease, background-color 0.18s ease;
}

.nav-link:hover {
  color: var(--color-ink);
  background-color: color-mix(in srgb, var(--color-surface-deep) 66%, transparent);
  text-decoration: none;
}

.nav-node {
  display: block;
  flex: none;
  width: 6px;
  height: 6px;
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-pill);
  transition: background-color 0.18s ease, border-color 0.18s ease, box-shadow 0.18s ease;
}

.nav-link[aria-current="page"] {
  color: var(--color-primary);
  font-weight: 600;
}

.nav-link[aria-current="page"] .nav-node {
  background-color: var(--color-accent);
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--color-accent) 20%, transparent);
}

.nav-cta { flex: none; }

/* ============ 9. 页脚 ============ */
.site-footer {
  padding-block: var(--section-y) var(--space-4);
  background-color: var(--color-surface);
  border-top: var(--border-thin) solid var(--color-line);
  color: var(--color-ink);
}

.footer-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-2) var(--space-4);
  padding-bottom: var(--space-4);
}

.footer-brand {
  margin: 0;
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  letter-spacing: 0.01em;
}

.footer-note {
  max-width: 46ch;
  margin: 0;
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1.6fr;
  gap: var(--space-4) var(--space-6);
  padding-block: var(--space-6);
}

.footer-col-title {
  margin: 0 0 var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.16em;
  color: var(--color-ink-muted);
}

.footer-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: var(--space-1);
}

.footer-list li { margin: 0; }

.footer-link {
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
}

.footer-link:hover { color: var(--color-primary); }

.footer-contact { min-width: 0; }

.contact-line {
  display: block;
  margin: 0 0 var(--space-2);
  font-size: var(--text-sm);
  line-height: 1.7;
}

.contact-key {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  color: var(--color-ink-muted);
}

.contact-value {
  display: block;
  font-family: var(--font-mono);
  color: var(--color-ink);
  overflow-wrap: anywhere;
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-1) var(--space-3);
  padding-top: var(--space-4);
}

.footer-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-1);
  margin: 0;
  font-size: var(--text-xs);
  color: var(--color-ink-muted);
}

.footer-meta a { color: var(--color-ink-muted); }
.footer-meta a:hover { color: var(--color-primary); }

/* ============ 10. 显现与筛选状态 ============ */
html[data-js="on"] [data-reveal] {
  opacity: 0;
  transform: translateY(18px);
}

html[data-js="on"] [data-reveal].is-visible {
  opacity: 1;
  transform: none;
  transition: opacity 0.6s ease, transform 0.6s cubic-bezier(0.22, 0.61, 0.36, 1);
}

.is-filtered-out { display: none !important; }

/* ============ 11. 响应式 ============ */
@media (max-width: 1100px) {
  .nav-link { padding: 10px 10px; }
  .nav-list { font-size: var(--text-sm); }
}

@media (max-width: 960px) {
  .nav-toggle { display: inline-flex; }

  .site-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: var(--space-2);
    max-height: calc(100vh - 76px);
    margin-left: 0;
    padding: var(--space-3) var(--gutter) var(--space-6);
    overflow-y: auto;
    background-color: var(--color-surface);
    border-bottom: var(--border-thin) solid var(--color-line);
    box-shadow: var(--shadow-2);
  }

  .site-header[data-open] .site-nav { display: flex; }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
  }

  .nav-list > li + li {
    border-left: 0;
    border-top: var(--border-thin) solid var(--color-line);
  }

  .nav-link {
    padding: 15px 8px;
    border-radius: 0;
    font-size: var(--text-base);
  }

  .nav-link:hover { background-color: transparent; }

  .nav-cta { width: 100%; }

  .span-4, .span-6, .span-8 { grid-column: span 12; }

  .footer-grid { grid-template-columns: 1fr; }

  .section { padding-block: calc(var(--section-y) * 0.78); }
  .section--lg { padding-block: calc(var(--section-y-lg) * 0.72); }
}

@media (max-width: 600px) {
  .header-inner { min-height: 68px; }
  .brand-sub { display: none; }
  .nav-toggle-text { display: none; }
  .nav-toggle { padding: 11px 14px; }
  .footer-head { flex-direction: column; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
  .deck { padding: var(--space-4) var(--space-3); }
}

/* ============ 12. 减弱动效 ============ */
@media (prefers-reduced-motion: reduce) {
  html[data-js="on"] [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .btn, .chip, .nav-link, .nav-node, .card, .nav-toggle-bars::before, .nav-toggle-bars::after, .skip-link {
    transition: none !important;
  }

  html { scroll-behavior: auto; }
}