/* 系统架构标准展示页样式
   与 business-module-standard.css 共用同一套 token 与排版语言：两份标准并排住在同一个站点里，视觉必须是一套。
   分叉只在系统侧独有的表达上：派生/原件双色、必填态徽章、落点节 id 的等宽列。 */
:root {
  color-scheme: light;
  --std-ink: #07152d;
  --std-text: #243550;
  --std-muted: #61728c;
  --std-blue: #0668f6;
  --std-blue-dark: #064da8;
  --std-red: #d93635;
  --std-teal: #009b91;
  --std-line: #cbd8e9;
  --std-line-strong: #9eb4d1;
  --std-soft: #f6f9fd;
  --std-max: 1680px;
  --std-gutter: clamp(30px, 4.6vw, 82px);
  --std-sans: Inter, "SF Pro Display", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --std-mono: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--std-ink);
  background: #fff;
  font-family: var(--std-sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

button, input, select, textarea { font: inherit; }
a { color: inherit; }
svg { fill: none; stroke: currentColor; stroke-width: 1.65; stroke-linecap: round; stroke-linejoin: round; }
.icon-sprite { position: absolute; width: 0; height: 0; overflow: hidden; }
.skip-link { position: fixed; z-index: 100; left: 14px; top: -60px; padding: 10px 14px; color: #fff; background: var(--std-blue); text-decoration: none; }
.skip-link:focus { top: 14px; }
code { font-family: var(--std-mono); font-size: .92em; }

/* ── 页头与页内导航 ───────────────────────────────── */
.standard-site-header {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  min-height: 70px;
  padding: 0 var(--std-gutter);
  border-bottom: 1px solid var(--std-line);
  background: #fff;
}
.standard-brand { display: inline-flex; align-items: center; gap: 10px; color: var(--std-ink); font-size: 17px; text-decoration: none; }
.standard-brand img { display: block; }
.standard-site-header > span { justify-self: center; color: var(--std-muted); font-size: 13px; }
.standard-site-header > a:last-child { display: inline-flex; align-items: center; gap: 7px; color: var(--std-blue); font-size: 12px; font-weight: 750; text-decoration: none; }
.standard-site-header > a:last-child svg { width: 15px; height: 15px; }
.is-embedded .standard-site-header { display: none; }

.standard-local-nav {
  position: sticky;
  z-index: 20;
  top: 0;
  display: flex;
  justify-content: center;
  gap: clamp(22px, 3vw, 54px);
  min-height: 52px;
  padding: 0 var(--std-gutter);
  border-bottom: 1px solid var(--std-line);
  background: rgba(255,255,255,.97);
}
.standard-local-nav a { position: relative; display: inline-flex; align-items: center; color: #53647e; font-size: 12px; font-weight: 720; text-decoration: none; white-space: nowrap; }
.standard-local-nav a::after { content: ""; position: absolute; left: 0; right: 0; bottom: -1px; height: 2px; background: var(--std-blue); transform: scaleX(0); transform-origin: left; transition: transform .2s ease; }
.standard-local-nav a:hover, .standard-local-nav a.is-active { color: var(--std-blue); }
.standard-local-nav a.is-active::after { transform: scaleX(1); }

/* ── Hero 与十节蓝图 ─────────────────────────────── */
.standard-hero {
  width: min(100%, var(--std-max));
  min-height: 720px;
  display: grid;
  grid-template-columns: minmax(520px, .84fr) minmax(700px, 1.16fr);
  gap: clamp(42px, 4vw, 74px);
  align-items: center;
  margin: 0 auto;
  padding: 72px var(--std-gutter) 82px;
  border-bottom: 1px solid var(--std-line);
}
.standard-hero-copy h1 { max-width: 660px; margin: 0; font-size: clamp(52px, 3.8vw, 66px); font-weight: 900; line-height: 1.08; letter-spacing: -.075em; }
.standard-hero-copy > p { max-width: 640px; margin: 28px 0 0; color: var(--std-muted); font-size: 18px; line-height: 1.85; }
.standard-actions { display: flex; flex-wrap: wrap; gap: 34px; margin-top: 38px; }
.standard-actions a { display: inline-flex; align-items: center; gap: 22px; padding-bottom: 5px; border-bottom: 1px solid var(--std-blue); color: var(--std-blue); font-size: 13px; font-weight: 780; text-decoration: none; }
.standard-actions svg { width: 17px; height: 17px; }
.standard-outcomes { display: grid; grid-template-columns: repeat(4, minmax(0,1fr)); margin: 58px 0 0; padding: 22px 0 0; border-top: 1px solid var(--std-line-strong); }
.standard-outcomes div { min-width: 0; padding: 0 14px; border-left: 2px solid #b8c9df; }
.standard-outcomes div:first-child { padding-left: 10px; border-color: var(--std-blue); }
.standard-outcomes dt { font-size: 13px; font-weight: 800; }
.standard-outcomes dd { margin: 3px 0 0; color: var(--std-muted); font-size: 10.5px; line-height: 1.5; }

/* 十节蓝图：一条从「主张」到「诚实边界」的轨道，蓝点标记含派生区的节 */
.page-blueprint { position: relative; min-width: 0; display: grid; grid-template-columns: 70px repeat(5, minmax(118px, 1fr)) 74px; gap: 10px; align-items: center; margin: 0; padding-top: 56px; }
.page-blueprint figcaption { position: absolute; left: 70px; right: 74px; top: 0; display: grid; grid-template-columns: auto 1fr auto; gap: 16px; align-items: center; color: var(--std-blue-dark); font: 750 12px var(--std-mono); letter-spacing: .08em; }
.page-blueprint figcaption i { height: 1px; background: var(--std-blue); }
.page-blueprint figcaption b { font: inherit; }
.plane-track { position: absolute; z-index: 0; left: 52px; right: 46px; top: calc(50% + 26px); height: 1px; background: var(--std-blue); }
.plane-track::after { content: ""; position: absolute; right: -2px; top: -4px; width: 8px; height: 8px; border-top: 1px solid var(--std-teal); border-right: 1px solid var(--std-teal); transform: rotate(45deg); }
.claim-node, .honest-node { position: relative; z-index: 2; display: grid; gap: 2px; align-self: center; font-family: var(--std-mono); }
.claim-node::before, .honest-node::before { content: ""; width: 16px; height: 16px; margin-bottom: 6px; border-radius: 50%; background: var(--std-blue); box-shadow: 0 0 0 4px #fff; }
.honest-node::before { background: var(--std-teal); }
.claim-node b, .honest-node b { color: var(--std-blue); font-size: 11px; }
.honest-node b { color: var(--std-teal); }
.claim-node span, .honest-node span { color: var(--std-muted); font-size: 10px; }

.plane {
  --plane-color: var(--std-blue);
  position: relative;
  z-index: 1;
  min-height: 462px;
  padding: 24px 18px 22px;
  border: 1px solid var(--plane-color);
  background: rgba(255,255,255,.94);
}
.plane:nth-of-type(2) { transform: translateY(12px); }
.plane:nth-of-type(3) { transform: translateY(24px); }
.plane:nth-of-type(4) { transform: translateY(36px); }
.plane:nth-of-type(5) { transform: translateY(48px); }
.plane::before { content: ""; position: absolute; left: -1px; right: -1px; top: 51%; border-top: 1px dashed color-mix(in srgb, var(--plane-color) 45%, #fff); }
.plane > span { color: var(--plane-color); font: 850 23px var(--std-mono); }
.plane h2 { min-height: 58px; margin: 8px 0 14px; font-size: 17px; line-height: 1.35; letter-spacing: -.04em; }
.plane > svg { width: 42px; height: 42px; margin: 18px 0 60px 4px; color: var(--plane-color); }
.plane > b { display: block; min-height: 42px; padding-bottom: 14px; border-bottom: 1px dashed color-mix(in srgb, var(--plane-color) 38%, #fff); color: var(--plane-color); font-size: 12px; line-height: 1.45; }
.plane ul { margin: 17px 0 0; padding: 0; list-style: none; }
.plane li { margin-top: 8px; color: var(--std-muted); font-size: 11px; line-height: 1.5; }
.plane em { display: block; margin-top: 14px; color: var(--std-blue-dark); font: 700 10px var(--std-mono); font-style: normal; letter-spacing: .04em; }
.plane-criteria { --plane-color: var(--std-red); }
.plane-verify { --plane-color: var(--std-teal); }

/* ── 通用章节 ───────────────────────────────────── */
.standard-section { width: min(100%, var(--std-max)); margin: 0 auto; padding: 94px var(--std-gutter); border-bottom: 1px solid var(--std-line); }
.standard-section:nth-of-type(odd) { background: #fbfcfe; }
.standard-section-heading { display: grid; grid-template-columns: minmax(0, 1fr) minmax(320px, .75fr); gap: 56px; align-items: end; margin-bottom: 48px; }
.standard-section-heading > div { display: grid; grid-template-columns: 44px minmax(0,1fr); gap: 18px; align-items: start; }
.standard-section-heading > div > span { padding-top: 10px; color: var(--std-blue); font: 850 13px var(--std-mono); }
.standard-section-heading h2 { max-width: 980px; margin: 0; font-size: clamp(34px, 3.1vw, 52px); line-height: 1.15; letter-spacing: -.055em; }
.standard-section-heading > p { margin: 0; padding-left: 24px; border-left: 3px solid #dce6f3; color: var(--std-muted); font-size: 15px; line-height: 1.8; }

/* ── 01 适用层级 ─────────────────────────────────── */
.level-comparison { display: grid; grid-template-columns: minmax(0,1fr) 160px minmax(0,1fr); align-items: stretch; border-top: 1px solid var(--std-line-strong); border-bottom: 1px solid var(--std-line-strong); }
.level-comparison > article { padding: 34px 38px 38px; }
.level-frame { border-left: 4px solid var(--std-red); }
.level-spec { border-right: 4px solid var(--std-blue); }
.level-comparison article header { display: flex; align-items: center; gap: 18px; }
.level-comparison article header svg { width: 42px; height: 42px; color: var(--std-blue); }
.level-frame header svg { color: var(--std-red) !important; }
.level-comparison article header small { color: var(--std-blue); font: 800 10px var(--std-mono); letter-spacing: .1em; }
.level-frame header small { color: var(--std-red) !important; }
.level-comparison h3 { margin: 2px 0 0; font-size: 28px; letter-spacing: -.04em; }
.level-comparison article > p { max-width: 620px; margin: 24px 0; color: var(--std-muted); font-size: 15px; line-height: 1.8; }
.level-comparison dl { margin: 0; }
.level-comparison dl div { display: grid; grid-template-columns: 110px 1fr; gap: 18px; padding: 13px 0; border-top: 1px solid var(--std-line); }
.level-comparison dt { color: var(--std-muted); font-size: 12px; }
.level-comparison dd { margin: 0; font-size: 13px; font-weight: 680; }
.level-bridge { position: relative; display: grid; place-content: center; gap: 12px; padding: 24px; border-left: 1px solid var(--std-line); border-right: 1px solid var(--std-line); color: var(--std-muted); text-align: center; }
.level-bridge span { font-size: 11px; }
.level-bridge i { position: relative; display: block; width: 78px; height: 1px; margin: 0 auto; background: var(--std-blue); }
.level-bridge i::after { content: ""; position: absolute; right: 0; top: -3px; width: 6px; height: 6px; border-top: 1px solid var(--std-blue); border-right: 1px solid var(--std-blue); transform: rotate(45deg); }
.level-bridge b { color: var(--std-blue); font-size: 12px; }
.level-principle { display: grid; grid-template-columns: 150px 1fr; gap: 28px; margin: 28px 0 0; padding: 20px 24px; border: 1px solid var(--std-line); }
.level-principle b { color: var(--std-blue); font-size: 13px; }
.level-principle ol { margin: 0; padding-left: 20px; color: var(--std-muted); font-size: 13px; line-height: 1.85; }
.level-principle ol b { color: var(--std-ink); }
.level-note { margin: 18px 0 0; padding-left: 24px; border-left: 3px solid #dce6f3; color: var(--std-muted); font-size: 13px; line-height: 1.8; }

/* ── 02 视图表 ───────────────────────────────────── */
.standard-section-heading--views { margin-bottom: 34px; }
.standard-section-heading--views h2 { max-width: none; font-size: clamp(34px, 2.6vw, 44px); }
.plane-filter { display: flex; flex-wrap: wrap; border: 1px solid var(--std-line); }
.plane-filter button { min-height: 48px; flex: 1 1 150px; padding: 0 18px; border: 0; border-right: 1px solid var(--std-line); background: #fff; color: var(--std-muted); font-size: 12px; font-weight: 720; cursor: pointer; }
.plane-filter button:last-child { border-right: 0; }
.plane-filter button:hover { color: var(--std-blue); }
.plane-filter button.is-active { color: #fff; background: var(--std-blue); }

.view-table { margin-top: 20px; border-top: 1px solid var(--std-line-strong); border-bottom: 1px solid var(--std-line-strong); }
.view-table-head,
.view-row { display: grid; grid-template-columns: 118px 46px 128px minmax(250px,1.6fr) 118px minmax(150px,.92fr) 104px 96px minmax(170px,1fr); }
.view-table-head { min-height: 48px; align-items: center; color: var(--std-ink); font-size: 11px; font-weight: 800; }
.view-table-head span { padding: 0 12px; }
.view-row { position: relative; min-height: 104px; border-top: 1px solid var(--std-line); transition: opacity .18s ease, background .18s ease; }
.view-row > * { min-width: 0; margin: 0; padding: 20px 12px; border-right: 1px solid #e0e7f0; }
.view-row > *:last-child { border-right: 0; }
.view-row .view-plane { color: var(--std-blue); font-size: 12px; font-weight: 800; }
.view-row[data-plane="criteria"] .view-plane { color: var(--std-red); }
.view-row[data-plane="verify"] .view-plane { color: var(--std-teal); }
.view-row > b { color: var(--std-blue); font: 850 14px var(--std-mono); }
.view-row h3 { font-size: 16px; line-height: 1.35; }
.view-row p { color: var(--std-text); font-size: 12.5px; line-height: 1.7; }
.view-row .view-ban { margin-top: 9px; color: var(--std-red); font-size: 11.5px; line-height: 1.6; }
.view-row .view-home { color: var(--std-blue-dark); font: 700 11.5px var(--std-mono); word-break: break-all; }
.view-row ul { list-style: none; }
.view-row li { color: var(--std-blue-dark); font-size: 11.5px; line-height: 1.65; }
.view-row .view-source { color: var(--std-muted); font-size: 11.5px; line-height: 1.65; }
.view-row .view-source b { color: var(--std-blue); font-weight: 800; }
.view-row .view-source i { color: var(--std-text); font-style: normal; font-weight: 700; }
.view-row small { color: var(--std-muted); font-size: 11px; line-height: 1.7; }
.view-row.is-dimmed { opacity: .24; }
.view-row.is-focused { background: #f3f8ff; }
.view-need { align-self: start; }
.view-need em { display: inline-block; padding: 3px 8px; border: 1px solid var(--std-line-strong); color: var(--std-text); font-size: 10.5px; font-style: normal; font-weight: 780; white-space: nowrap; }
.view-need em.is-must { border-color: var(--std-blue); color: #fff; background: var(--std-blue); }
.view-need em.is-cond { border-color: var(--std-blue); color: var(--std-blue); }
.view-need em.is-rec { border-color: var(--std-line-strong); color: var(--std-muted); }
.view-need small { display: block; padding: 8px 0 0; color: var(--std-muted); font-size: 10.5px; line-height: 1.5; }
.traceability-rail { display: grid; grid-template-columns: auto 1fr auto 1fr auto 1fr auto 1fr auto; gap: 16px; align-items: center; margin-top: 25px; color: var(--std-blue-dark); font: 760 11px var(--std-mono); letter-spacing: .04em; }
.traceability-rail i { position: relative; height: 1px; background: var(--std-blue); }
.traceability-rail i::after { content: ""; position: absolute; right: 0; top: -3px; width: 6px; height: 6px; border-top: 1px solid var(--std-blue); border-right: 1px solid var(--std-blue); transform: rotate(45deg); }
.traceability-rail span:last-child { color: var(--std-teal); }
.section-rail { display: flex; flex-wrap: wrap; gap: 0; margin-top: 26px; border: 1px solid var(--std-line); }
.section-rail article { flex: 1 1 128px; min-width: 0; padding: 14px 14px 16px; border-right: 1px solid var(--std-line); }
.section-rail article:last-child { border-right: 0; }
.section-rail code { display: block; color: var(--std-blue-dark); font-size: 11.5px; font-weight: 700; }
.section-rail b { display: block; margin-top: 5px; font-size: 12.5px; }
.section-rail span { display: block; margin-top: 6px; color: var(--std-muted); font-size: 10.5px; line-height: 1.5; }
.section-rail article.has-derived { background: #f3f8ff; }
.section-rail article.has-derived code::before { content: "● "; color: var(--std-blue); }
.section-rail article.is-cond code::before { content: "◇ "; color: var(--std-muted); }
.rail-legend { display: flex; flex-wrap: wrap; gap: 26px; margin-top: 12px; color: var(--std-muted); font-size: 11px; }
.rail-legend b { color: var(--std-blue); }

/* ── 03 派生与原件 ───────────────────────────────── */
.region-split { display: grid; grid-template-columns: minmax(0,1fr) 150px minmax(0,1fr); border-top: 1px solid var(--std-line-strong); border-bottom: 1px solid var(--std-line-strong); }
.region-split > article { padding: 34px 38px 38px; }
.region-machine { border-left: 4px solid var(--std-blue); }
.region-human { border-right: 4px solid var(--std-teal); }
.region-split article > span { color: var(--std-blue); font: 800 10px var(--std-mono); letter-spacing: .1em; }
.region-human > span { color: var(--std-teal); }
.region-split h3 { margin: 7px 0 0; font-size: 27px; letter-spacing: -.04em; }
.region-split article > p { margin: 18px 0 24px; color: var(--std-muted); font-size: 14px; line-height: 1.8; }
.region-split ul { margin: 0; padding: 0; list-style: none; }
.region-split li { display: grid; grid-template-columns: 132px 1fr; gap: 16px; padding: 11px 0; border-top: 1px solid var(--std-line); font-size: 12.5px; line-height: 1.65; }
.region-split li code { color: var(--std-blue-dark); font-weight: 700; }
.region-human li code { color: var(--std-teal); }
.region-split li span { color: var(--std-muted); }
.region-divider { display: grid; place-content: center; gap: 13px; padding: 24px; border-left: 1px solid var(--std-line); border-right: 1px solid var(--std-line); color: var(--std-muted); text-align: center; }
.region-divider span { font-size: 11px; }
.region-divider i { height: 78px; width: 1px; margin: 0 auto; background: var(--std-blue); }
.region-divider b { color: var(--std-blue); font-size: 12px; }
.stamp-grid { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); margin-top: 30px; border: 1px solid var(--std-line); }
.stamp-grid article { min-height: 128px; padding: 22px 24px; }
.stamp-grid article + article { border-left: 1px solid var(--std-line); }
.stamp-grid code { color: var(--std-blue); font-size: 13px; font-weight: 700; }
.stamp-grid p { margin: 9px 0 0; color: var(--std-muted); font-size: 12px; line-height: 1.7; }
.forbid-list { display: grid; grid-template-columns: repeat(4, minmax(0,1fr)); margin-top: 30px; border: 1px solid var(--std-line); }
.forbid-list article { min-height: 148px; padding: 24px; }
.forbid-list article + article { border-left: 1px solid var(--std-line); }
.forbid-list b { color: var(--std-red); font-size: 14px; }
.forbid-list p { margin: 10px 0 0; color: var(--std-muted); font-size: 12px; line-height: 1.7; }

/* ── 04 门槛与样板 ───────────────────────────────── */
.gate-layout { display: grid; grid-template-columns: minmax(0,1.7fr) minmax(360px,.75fr); gap: 38px; }
.gate-main { min-width: 0; padding-right: 38px; border-right: 1px solid var(--std-line-strong); }
.evidence-chain { display: grid; grid-template-columns: repeat(4,minmax(120px,1fr) 34px) minmax(120px,1fr); align-items: stretch; border-bottom: 1px solid var(--std-line-strong); }
.evidence-chain article { min-width: 0; padding: 18px 6px 24px; }
.evidence-chain article b { color: var(--std-blue); font: 850 21px var(--std-mono); }
.evidence-chain article:nth-of-type(4) b { color: var(--std-red); }
.evidence-chain article:nth-of-type(5) b { color: var(--std-teal); }
.evidence-chain h3 { margin: 8px 0 0; font-size: 16px; }
.evidence-chain p { margin: 8px 0 0; color: var(--std-muted); font-size: 11px; line-height: 1.65; }
.evidence-chain > i { position: relative; }
.evidence-chain > i::before { content: ""; position: absolute; left: 4px; right: 4px; top: 49%; height: 1px; background: var(--std-blue); }
.evidence-chain > i::after { content: ""; position: absolute; right: 4px; top: calc(49% - 3px); width: 6px; height: 6px; border-top: 1px solid var(--std-blue); border-right: 1px solid var(--std-blue); transform: rotate(45deg); }
.gate-subtitle { margin: 34px 0 14px; font-size: 20px; }
.acceptance-gates { margin: 0; padding: 0; border-top: 1px solid var(--std-line); list-style: none; }
.acceptance-gates li { display: grid; grid-template-columns: 44px 128px minmax(0,1fr) 120px; gap: 18px; align-items: center; min-height: 86px; border-bottom: 1px solid var(--std-line); }
.acceptance-gates li > b { color: var(--std-blue-dark); font: 850 25px var(--std-mono); }
.acceptance-gates strong { font-size: 16px; }
.acceptance-gates p { margin: 0; padding-left: 22px; border-left: 1px solid var(--std-line-strong); color: var(--std-muted); font-size: 12px; line-height: 1.65; }
.acceptance-gates em { color: var(--std-teal); font-size: 11px; font-style: normal; font-weight: 760; line-height: 1.5; }
.acceptance-gates em.is-manual { color: var(--std-muted); }
.sample-benchmark { min-width: 0; }
.sample-benchmark header > span { color: var(--std-blue); font: 800 10px var(--std-mono); letter-spacing: .1em; }
.sample-benchmark h3 { margin: 8px 0 0; font-size: 27px; letter-spacing: -.04em; }
.sample-benchmark header p { margin: 8px 0 0; color: var(--std-muted); font-size: 12px; line-height: 1.65; }
.sample-benchmark ol { margin: 26px 0 0; padding: 0; border-top: 1px solid var(--std-line-strong); list-style: none; }
.sample-benchmark li { display: grid; grid-template-columns: 34px minmax(0,1fr) auto; gap: 10px; align-items: center; min-height: 37px; border-bottom: 1px solid var(--std-line); }
.sample-benchmark li b { color: var(--std-blue); font: 750 10px var(--std-mono); }
.sample-benchmark li span { font-size: 12px; }
.sample-benchmark li em { color: var(--std-teal); font-size: 11px; font-style: normal; font-weight: 750; }
.sample-benchmark li.is-gap em { color: var(--std-red); }
.benchmark-conclusion { margin: 24px 0; padding: 20px 0; border-top: 1px solid var(--std-line-strong); border-bottom: 1px solid var(--std-line-strong); }
.benchmark-conclusion b { display: block; margin-bottom: 8px; font-size: 13px; }
.benchmark-conclusion span { color: var(--std-text); font-size: 15px; font-weight: 740; line-height: 1.65; }
.sample-benchmark > a { display: inline-flex; align-items: center; gap: 22px; padding-bottom: 4px; border-bottom: 1px solid var(--std-blue); color: var(--std-blue); font-size: 12px; font-weight: 760; text-decoration: none; }
.sample-benchmark > a svg { width: 16px; height: 16px; }

/* ── 05 治理分工 ─────────────────────────────────── */
.governance-split { display: grid; grid-template-columns: minmax(0,1fr) 170px minmax(0,1fr); border-top: 1px solid var(--std-line-strong); border-bottom: 1px solid var(--std-line-strong); }
.governance-split > article { padding: 36px 40px; }
.governance-split article > span { color: var(--std-blue); font: 800 10px var(--std-mono); letter-spacing: .1em; }
.governance-split article:last-child > span { color: var(--std-teal); }
.governance-split h3 { margin: 7px 0 0; font-size: 29px; }
.governance-split article > strong { display: block; margin-top: 4px; color: var(--std-muted); font-size: 13px; }
.governance-split article > p { margin: 24px 0; color: var(--std-text); font-size: 14px; line-height: 1.8; }
.governance-split dl { margin: 0; }
.governance-split dl div { display: grid; grid-template-columns: 100px 1fr; gap: 20px; padding: 13px 0; border-top: 1px solid var(--std-line); }
.governance-split dt { color: var(--std-muted); font-size: 12px; }
.governance-split dd { margin: 0; font-size: 12px; line-height: 1.65; }
.governance-divider { display: grid; place-content: center; gap: 13px; padding: 24px; border-left: 1px solid var(--std-line); border-right: 1px solid var(--std-line); color: var(--std-muted); text-align: center; }
.governance-divider span { font-size: 11px; }
.governance-divider i { height: 78px; width: 1px; margin: 0 auto; background: var(--std-blue); }
.governance-divider b { color: var(--std-blue); font-size: 12px; }
.standard-handoff { display: grid; grid-template-columns: minmax(0,1fr) auto; gap: 34px; align-items: center; margin-top: 34px; padding: 27px 30px; border: 1px solid var(--std-line); }
.standard-handoff > div { display: grid; grid-template-columns: 40px 1fr; gap: 18px; align-items: center; }
.standard-handoff > div svg { width: 36px; height: 36px; color: var(--std-teal); }
.standard-handoff b { font-size: 15px; }
.standard-handoff p { margin: 3px 0 0; color: var(--std-muted); font-size: 12px; }
.standard-handoff nav { display: flex; gap: 28px; }
.standard-handoff a { display: inline-flex; align-items: center; gap: 16px; padding-bottom: 4px; border-bottom: 1px solid var(--std-blue); color: var(--std-blue); font-size: 12px; font-weight: 760; text-decoration: none; white-space: nowrap; }
.standard-handoff a svg { width: 15px; height: 15px; }

.standard-footer { width: min(100%, var(--std-max)); min-height: 96px; display: grid; grid-template-columns: auto 1fr auto; gap: 30px; align-items: center; margin: 0 auto; padding: 0 var(--std-gutter); }
.standard-footer span { color: var(--std-ink); font-size: 12px; font-weight: 800; }
.standard-footer p { margin: 0; color: var(--std-muted); font-size: 11px; text-align: center; }
.standard-footer a { color: var(--std-blue); font-size: 11px; font-weight: 760; text-decoration: none; }

/* ── 断点 ───────────────────────────────────────── */
@media (max-width: 1380px) {
  .standard-hero { grid-template-columns: 1fr; }
  .standard-hero-copy h1 { max-width: 900px; }
  .page-blueprint { width: 100%; }
  .view-table { overflow-x: auto; }
  .view-table-head, .view-row { min-width: 1380px; }
  .gate-layout { grid-template-columns: 1fr; }
  .gate-main { padding-right: 0; border-right: 0; }
  .sample-benchmark { padding-top: 36px; border-top: 1px solid var(--std-line-strong); }
  .forbid-list { grid-template-columns: repeat(2, minmax(0,1fr)); }
  .forbid-list article:nth-child(3) { border-left: 0; border-top: 1px solid var(--std-line); }
  .forbid-list article:nth-child(4) { border-top: 1px solid var(--std-line); }
}

@media (max-width: 980px) {
  .standard-local-nav { justify-content: flex-start; overflow-x: auto; }
  .standard-hero { min-height: auto; padding-top: 58px; }
  .standard-hero-copy h1 { font-size: clamp(44px, 7.8vw, 62px); }
  .page-blueprint { grid-template-columns: 64px repeat(5, minmax(150px,1fr)) 72px; overflow-x: auto; padding-bottom: 55px; }
  .page-blueprint figcaption { min-width: 900px; }
  .plane { min-height: 436px; }
  .standard-section-heading { grid-template-columns: 1fr; gap: 20px; }
  .standard-section-heading > p { margin-left: 62px; }
  .level-comparison { grid-template-columns: 1fr; }
  .level-bridge { min-height: 120px; border: 0; border-top: 1px solid var(--std-line); border-bottom: 1px solid var(--std-line); }
  .level-bridge i { transform: rotate(90deg); }
  .level-frame { border-left-width: 3px; }
  .level-spec { border-right: 0; border-left: 3px solid var(--std-blue); }
  .region-split { grid-template-columns: 1fr; }
  .region-divider { min-height: 115px; border: 0; border-top: 1px solid var(--std-line); border-bottom: 1px solid var(--std-line); }
  .region-divider i { width: 78px; height: 1px; }
  .region-human { border-right: 0; border-left: 3px solid var(--std-teal); }
  .stamp-grid { grid-template-columns: 1fr; }
  .stamp-grid article + article { border-left: 0; border-top: 1px solid var(--std-line); }
  .evidence-chain { overflow-x: auto; }
  .evidence-chain > * { min-width: 110px; }
  .acceptance-gates li { grid-template-columns: 44px 120px minmax(0,1fr); }
  .acceptance-gates em { grid-column: 2 / 4; padding-top: 4px; }
  .governance-split { grid-template-columns: 1fr; }
  .governance-divider { min-height: 115px; border: 0; border-top: 1px solid var(--std-line); border-bottom: 1px solid var(--std-line); }
  .governance-divider i { width: 78px; height: 1px; }
  .standard-handoff { grid-template-columns: 1fr; }
}

@media (max-width: 680px) {
  :root { --std-gutter: 22px; }
  .standard-site-header { grid-template-columns: 1fr auto; }
  .standard-site-header > span { display: none; }
  .standard-local-nav { gap: 26px; }
  .standard-hero { gap: 46px; padding-top: 46px; padding-bottom: 58px; }
  .standard-hero-copy h1 { font-size: 40px; line-height: 1.12; }
  .standard-hero-copy > p { font-size: 16px; }
  .standard-actions { display: grid; gap: 20px; }
  .standard-actions a { width: max-content; }
  .standard-outcomes { grid-template-columns: repeat(2,1fr); gap: 22px 0; }
  .page-blueprint { display: grid; grid-template-columns: 1fr; gap: 12px; overflow: visible; padding-top: 54px; }
  .page-blueprint figcaption { left: 0; right: 0; min-width: 0; }
  .plane-track, .claim-node, .honest-node { display: none; }
  .plane { min-height: auto; display: grid; grid-template-columns: 46px 1fr 38px; gap: 5px 12px; padding: 20px; transform: none !important; }
  .plane::before { display: none; }
  .plane > span { grid-row: 1 / 3; font-size: 19px; }
  .plane h2 { min-height: 0; margin: 0; font-size: 18px; }
  .plane > svg { grid-column: 3; grid-row: 1 / 3; width: 32px; height: 32px; margin: 0; }
  .plane > b { grid-column: 2 / 4; min-height: 0; margin-top: 12px; padding: 12px 0; }
  .plane ul, .plane em { grid-column: 2 / 4; margin-top: 6px; }
  .standard-section { padding-top: 68px; padding-bottom: 68px; }
  .standard-section-heading > div { grid-template-columns: 30px 1fr; gap: 10px; }
  .standard-section-heading h2 { font-size: 32px; }
  .standard-section-heading > p { margin-left: 40px; padding-left: 18px; font-size: 14px; }
  .level-comparison > article { padding: 28px 22px; }
  .level-comparison dl div { grid-template-columns: 90px 1fr; }
  .level-principle { grid-template-columns: 1fr; gap: 8px; }
  .plane-filter { display: grid; grid-template-columns: repeat(2,1fr); }
  .plane-filter button { border-bottom: 1px solid var(--std-line); }
  .view-table { overflow: visible; border-top: 0; }
  .view-table-head { display: none; }
  .view-row { min-width: 0; display: grid; grid-template-columns: 50px 1fr; min-height: 0; margin-top: 14px; padding: 20px; border: 1px solid var(--std-line); }
  .view-row > * { padding: 0; border-right: 0; }
  .view-row .view-plane { grid-column: 1 / 3; padding-bottom: 12px; border-bottom: 1px solid var(--std-line); }
  .view-row > b { padding-top: 18px; }
  .view-row h3 { padding-top: 16px; font-size: 19px; }
  .view-row p, .view-row ul, .view-row .view-home, .view-row .view-source, .view-row .view-need, .view-row small { grid-column: 2; margin-top: 13px; }
  .section-rail article { flex: 1 1 100%; border-right: 0; border-bottom: 1px solid var(--std-line); }
  .traceability-rail { grid-template-columns: 1fr; gap: 10px; }
  .traceability-rail i { width: 1px; height: 18px; margin-left: 10px; }
  .region-split > article { padding: 30px 22px; }
  .region-split li { grid-template-columns: 1fr; gap: 5px; }
  .forbid-list { grid-template-columns: 1fr; }
  .forbid-list article + article { border-left: 0; border-top: 1px solid var(--std-line); }
  .evidence-chain { grid-template-columns: 1fr; overflow: visible; }
  .evidence-chain > * { min-width: 0; }
  .evidence-chain > i { display: block; width: 1px; height: 22px; margin-left: 18px; background: var(--std-blue); }
  .evidence-chain > i::before, .evidence-chain > i::after { display: none; }
  .acceptance-gates li { grid-template-columns: 38px 1fr; gap: 12px; padding: 18px 0; }
  .acceptance-gates p { grid-column: 2; padding: 10px 0 0; border-left: 0; border-top: 1px solid var(--std-line); }
  .acceptance-gates em { grid-column: 2; }
  .sample-benchmark li { grid-template-columns: 30px 1fr; padding: 9px 0; }
  .sample-benchmark li em { grid-column: 2; }
  .governance-split > article { padding: 30px 22px; }
  .governance-split dl div { grid-template-columns: 1fr; gap: 5px; }
  .standard-handoff { padding: 22px; }
  .standard-handoff nav { display: grid; gap: 18px; }
  .standard-footer { grid-template-columns: 1fr auto; padding-top: 28px; padding-bottom: 28px; }
  .standard-footer p { grid-column: 1 / 3; grid-row: 2; text-align: left; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; }
}