:root {
  color-scheme: light;
  --bg: #f5f7fb;
  --paper: #ffffff;
  --ink: #18202c;
  --muted: #647084;
  --line: #dce4ef;
  --line-strong: #aeb9c8;
  --accent: #0f766e;
  --accent-strong: #115e59;
  --accent-soft: #e5f4f1;
  --blue: #1d4ed8;
  --amber: #b45309;
  --green: #15803d;
  --shadow: 0 18px 44px rgba(31, 43, 62, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 24px;
}

body {
  margin: 0;
  background:
    linear-gradient(130deg, rgba(15, 118, 110, 0.08), transparent 40%),
    linear-gradient(280deg, rgba(29, 78, 216, 0.07), transparent 36%),
    var(--bg);
  color: var(--ink);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    "PingFang SC", "Microsoft YaHei", sans-serif;
  line-height: 1.72;
}

a {
  color: var(--accent);
  font-weight: 750;
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.18em;
}

.page-shell {
  width: min(1240px, calc(100% - 32px));
  margin: 0 auto;
  padding: 28px 0 64px;
}

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

.top-nav a {
  display: inline-flex;
  align-items: center;
  min-height: 36px;
  padding: 0 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.82);
  color: var(--accent-strong);
  font-size: 0.92rem;
  text-decoration: none;
}

.hero {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.93);
  box-shadow: var(--shadow);
  padding: 36px;
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--accent-strong);
  font-size: 0.8rem;
  font-weight: 900;
  letter-spacing: 0;
}

h1,
h2,
h3 {
  letter-spacing: 0;
  line-height: 1.22;
}

h1 {
  max-width: 820px;
  margin: 0;
  font-size: 2.65rem;
}

.subtitle {
  max-width: 880px;
  margin: 16px 0 0;
  color: var(--muted);
  font-size: 1.08rem;
}

.meta-grid,
.kpi-grid,
.module-grid,
.roadmap-grid {
  display: grid;
  gap: 12px;
}

.meta-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
  margin-top: 24px;
}

.meta-card,
.kpi-card,
.module-card,
.roadmap-card,
.note,
.table-wrap {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fbfdff;
}

.meta-card {
  padding: 14px;
}

.meta-card strong,
.kpi-card strong {
  display: block;
  color: var(--ink);
  font-size: 1.03rem;
}

.meta-card span,
.kpi-card span {
  display: block;
  margin-top: 4px;
  color: var(--muted);
  font-size: 0.9rem;
}

.doc-layout {
  display: grid;
  grid-template-columns: 270px minmax(0, 1fr);
  gap: 18px;
  align-items: start;
  margin-top: 18px;
}

.toc {
  position: sticky;
  top: 18px;
  max-height: calc(100vh - 36px);
  overflow: auto;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.9);
  box-shadow: 0 12px 26px rgba(31, 43, 62, 0.08);
  padding: 16px;
}

.toc-title {
  margin: 0 0 10px;
  color: var(--accent);
  font-size: 0.85rem;
  font-weight: 900;
}

.toc ol {
  display: grid;
  gap: 2px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.toc a {
  display: block;
  padding: 7px 8px;
  border-radius: 6px;
  color: var(--ink);
  font-size: 0.9rem;
  font-weight: 750;
  line-height: 1.35;
  text-decoration: none;
}

.toc a:hover,
.toc a:focus-visible {
  background: var(--accent-soft);
  color: var(--accent-strong);
}

.content {
  min-width: 0;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.94);
  box-shadow: var(--shadow);
  padding: 34px;
}

section + section {
  margin-top: 36px;
  padding-top: 30px;
  border-top: 1px solid var(--line);
}

h2 {
  margin: 0 0 14px;
  font-size: 1.55rem;
}

h3 {
  margin: 24px 0 8px;
  font-size: 1.08rem;
}

p {
  margin: 10px 0;
}

ul,
ol {
  margin: 10px 0 16px;
  padding-left: 1.4rem;
}

li {
  margin: 6px 0;
}

.lead {
  color: var(--muted);
  font-size: 1.02rem;
}

.note {
  margin: 16px 0;
  padding: 14px 16px;
  background: var(--accent-soft);
  color: #123f3b;
  font-weight: 760;
}

.callout,
.panel {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fbfdff;
}

.callout {
  margin: 16px 0;
  padding: 16px;
  border-color: rgba(15, 118, 110, 0.24);
  background: var(--accent-soft);
}

.callout strong {
  color: var(--accent-strong);
}

.grid-two {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin: 16px 0;
}

.panel {
  padding: 16px;
}

.panel h3 {
  margin-top: 0;
  color: var(--accent-strong);
}

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

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

.kpi-card {
  padding: 16px;
}

.kpi-card em {
  display: block;
  color: var(--accent-strong);
  font-size: 1.8rem;
  font-style: normal;
  font-weight: 900;
  line-height: 1.1;
}

.module-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin-top: 14px;
}

.module-card {
  padding: 16px;
}

.module-card h3 {
  margin-top: 0;
  color: var(--accent-strong);
}

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

.table-wrap {
  margin: 16px 0;
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  min-width: 720px;
}

.content > table {
  display: block;
  margin: 16px 0;
  overflow-x: auto;
}

th,
td {
  padding: 12px 14px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

th {
  background: #f0f5fa;
  color: #243044;
  font-size: 0.88rem;
  white-space: nowrap;
}

tr:last-child td {
  border-bottom: 0;
}

code {
  padding: 0.13em 0.36em;
  border-radius: 5px;
  background: #eef3f8;
  color: #1d2a38;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 0.92em;
}

.flow {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
  margin: 16px 0;
}

.flow div {
  position: relative;
  min-height: 96px;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fbfdff;
}

.flow strong {
  display: block;
  color: var(--blue);
}

.flow span {
  display: block;
  margin-top: 4px;
  color: var(--muted);
  font-size: 0.9rem;
}

.timeline {
  display: grid;
  gap: 10px;
  margin: 16px 0;
}

.timeline-item {
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fbfdff;
}

.timeline-item strong {
  color: var(--blue);
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 16px 0;
}

.tag-list span {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 0 12px;
  border: 1px solid rgba(15, 118, 110, 0.24);
  border-radius: 8px;
  background: var(--accent-soft);
  color: var(--accent-strong);
  font-weight: 850;
}

.check-list {
  padding-left: 0;
  list-style: none;
}

.check-list li {
  padding: 9px 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fbfdff;
}

.check-list li::before {
  content: "✓";
  margin-right: 8px;
  color: var(--green);
  font-weight: 900;
}

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

.roadmap-card {
  padding: 16px;
}

.roadmap-card strong {
  color: var(--accent-strong);
}

.badge {
  display: inline-flex;
  align-items: center;
  min-height: 24px;
  padding: 0 8px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  background: #ffffff;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 850;
}

.footer-note {
  margin-top: 30px;
  color: var(--muted);
  font-size: 0.92rem;
}

@media (max-width: 980px) {
  .doc-layout,
  .meta-grid,
  .kpi-grid,
  .module-grid,
  .grid-two,
  .flow,
  .roadmap-grid {
    grid-template-columns: 1fr;
  }

  .toc {
    position: static;
    max-height: none;
  }
}

@media (max-width: 640px) {
  .page-shell {
    width: min(100% - 20px, 1240px);
    padding: 18px 0 36px;
  }

  .hero,
  .content {
    padding: 22px;
  }

  h1 {
    font-size: 2rem;
  }

  h2 {
    font-size: 1.32rem;
  }
}