:root {
  color-scheme: light;
  --ink: #16202a;
  --muted: #607080;
  --line: #dbe3e7;
  --soft: #f4f7f8;
  --paper: #ffffff;
  --nav: #18232c;
  --nav-2: #22323d;
  --teal: #0d8f83;
  --teal-soft: #e6f5f2;
  --coral: #ef6a63;
  --coral-soft: #fff0ee;
  --sky: #3f91d6;
  --sky-soft: #eaf4fd;
  --mint: #32a66f;
  --mint-soft: #eaf8f1;
  --amber: #bd7a0a;
  --amber-soft: #fff5dc;
  --shadow: 0 16px 48px rgba(25, 42, 50, 0.10);
  --sidebar: 264px;
  --topbar: 64px;
  font-family: Inter, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  line-height: 1.68;
}

button, input, select { font: inherit; }

button { cursor: pointer; }

a { color: inherit; }

::selection { background: #bce8e2; color: #0b342f; }

.topbar {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 50;
  height: var(--topbar);
  display: grid;
  grid-template-columns: var(--sidebar) minmax(280px, 620px) 1fr;
  align-items: center;
  gap: 28px;
  padding: 0 24px 0 18px;
  color: #f7fafb;
  background: var(--nav);
  border-bottom: 1px solid #30414c;
}

.brand {
  display: flex;
  align-items: center;
  gap: 11px;
  text-decoration: none;
  min-width: 0;
}

.brand img {
  width: 34px;
  height: 34px;
  object-fit: cover;
  border-radius: 6px;
  background: white;
}

.brand strong {
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
  font-size: 15px;
  letter-spacing: 0;
}

.search-trigger {
  height: 38px;
  display: flex;
  align-items: center;
  gap: 9px;
  width: 100%;
  padding: 0 12px;
  color: #cbd5da;
  background: #22313b;
  border: 1px solid #3b4b55;
  border-radius: 6px;
}

.search-trigger:hover { border-color: #6ca9a4; }

.search-trigger .key {
  margin-left: auto;
  padding: 1px 7px;
  color: #9fb0ba;
  border: 1px solid #52626c;
  border-radius: 4px;
  font-size: 12px;
}

.topmeta {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  gap: 16px;
  color: #c9d3d9;
  font-size: 13px;
  white-space: nowrap;
}

.topmeta a { text-decoration: none; }
.topmeta a:hover { color: white; }

.language-switch {
  display: inline-flex;
  flex: 0 0 auto;
  padding: 2px;
  background: #22313b;
  border: 1px solid #4b5e69;
  border-radius: 6px;
}

.language-switch button {
  min-width: 34px;
  height: 28px;
  padding: 0 8px;
  color: #aebdc5;
  background: transparent;
  border: 0;
  border-radius: 4px;
  font-size: 12px;
  font-weight: 800;
}

.language-switch button[aria-pressed="true"] { color: #102b2a; background: #78d3cb; }
.language-switch button:focus-visible { outline: 2px solid white; outline-offset: 2px; }

.copy-edit-toggle {
  min-height: 34px;
  padding: 0 11px;
  color: #edf7f6;
  background: #17635f;
  border: 1px solid #4a908a;
  border-radius: 5px;
  font-size: 12px;
  font-weight: 750;
}

.copy-edit-toggle:hover { background: #1c756f; }

.menu-button {
  display: none;
  width: 38px;
  height: 38px;
  padding: 0;
  color: white;
  background: transparent;
  border: 1px solid #42535f;
  border-radius: 6px;
}

.sidebar {
  position: fixed;
  inset: var(--topbar) auto 0 0;
  z-index: 40;
  width: var(--sidebar);
  overflow-y: auto;
  padding: 20px 14px 30px;
  color: #bfcbd1;
  background: var(--nav);
  border-right: 1px solid #30414c;
}

.nav-section { display: flex; flex-direction: column; margin: 0 0 20px; }
.nav-section .nav-label { order: 0; }

.nav-label {
  margin: 0 10px 6px;
  color: #71848f;
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 38px;
  padding: 8px 10px;
  border-radius: 6px;
  text-decoration: none;
  font-size: 14px;
}

.nav-link:hover { color: white; background: var(--nav-2); }

.nav-link.active {
  color: white;
  background: #17635f;
  box-shadow: inset 3px 0 0 #57d1c6;
}

.nav-index {
  display: grid;
  place-items: center;
  flex: 0 0 24px;
  height: 24px;
  color: #8fa0aa;
  border: 1px solid #40515c;
  border-radius: 5px;
  font-size: 11px;
  font-weight: 800;
}

.nav-link.active .nav-index { color: white; border-color: #66c6be; }

.sidebar-foot {
  margin: 28px 8px 0;
  padding: 14px 10px;
  border-top: 1px solid #34454f;
  color: #8fa0aa;
  font-size: 12px;
}

.layout {
  min-height: 100vh;
  padding: calc(var(--topbar) + 32px) 252px 80px calc(var(--sidebar) + 42px);
}

.content { max-width: 1120px; margin: 0 auto; }

.toc {
  position: fixed;
  top: calc(var(--topbar) + 34px);
  right: 22px;
  width: 202px;
  max-height: calc(100vh - var(--topbar) - 68px);
  overflow-y: auto;
  padding-left: 18px;
  border-left: 1px solid var(--line);
}

.toc strong { display: block; margin-bottom: 8px; font-size: 13px; }

.toc a {
  display: block;
  padding: 4px 0;
  color: #71808c;
  text-decoration: none;
  font-size: 12px;
  line-height: 1.45;
}

.toc a.level-3 { padding-left: 12px; }
.toc a:hover, .toc a.active { color: var(--teal); }

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 18px;
  color: #7a8790;
  font-size: 13px;
}

.breadcrumb a { text-decoration: none; }

.page-head {
  margin-bottom: 34px;
  padding-bottom: 28px;
  border-bottom: 1px solid var(--line);
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--teal);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1, h2, h3, h4 { letter-spacing: 0; line-height: 1.22; }

h1 {
  max-width: 900px;
  margin: 0;
  font-size: 48px;
  font-weight: 780;
}

.page-subtitle {
  max-width: 780px;
  margin: 16px 0 0;
  color: var(--muted);
  font-size: 18px;
}

h2 {
  margin: 64px 0 18px;
  padding-top: 8px;
  font-size: 28px;
}

h2[id], h3[id] { scroll-margin-top: calc(var(--topbar) + 18px); }

h2::before {
  content: "";
  display: inline-block;
  width: 4px;
  height: 22px;
  margin-right: 10px;
  vertical-align: -2px;
  background: var(--teal);
}

h3 { margin: 34px 0 12px; font-size: 20px; }

p { margin: 0 0 16px; }

.lead {
  max-width: 840px;
  color: #3f4e58;
  font-size: 17px;
}

.metric-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  margin: 30px 0 18px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.metric {
  min-height: 112px;
  padding: 22px 20px;
  border-right: 1px solid var(--line);
}

.metric:last-child { border-right: 0; }
.metric b { display: block; font-size: 30px; line-height: 1.1; }
.metric span { display: block; margin-top: 6px; color: var(--muted); font-size: 13px; }

.workflow-rail {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 22px;
  align-items: center;
  margin: 28px 0 32px;
}

.workflow-rail.stage-selector {
  grid-template-columns: repeat(7, minmax(0, 1fr));
  gap: 14px;
}

.workflow-stage {
  position: relative;
  display: grid;
  place-items: center;
  min-height: 96px;
  padding: 12px 8px;
  text-align: center;
  background: var(--soft);
  border: 1px solid var(--line);
  border-radius: 6px;
  font-size: 14px;
  font-weight: 750;
}

.workflow-stage::after {
  content: "→";
  position: absolute;
  right: -20px;
  color: #91a0a8;
  font-size: 17px;
}

.workflow-stage:last-child::after { content: none; }
.stage-selector .workflow-stage.selected {
  color: #0a4f49;
  border-color: var(--teal);
  box-shadow: inset 0 0 0 1px var(--teal);
}
.workflow-stage:nth-child(2) { background: var(--teal-soft); border-color: #afdcd6; }
.workflow-stage:nth-child(3) { background: var(--sky-soft); border-color: #bfdcf4; }
.workflow-stage:nth-child(4) { background: var(--amber-soft); border-color: #f0d290; }
.workflow-stage:nth-child(5) { background: var(--mint-soft); border-color: #b7e4cc; }
.workflow-stage:nth-child(6) { background: var(--coral-soft); border-color: #f3c5c1; }

.stage-num {
  display: block;
  margin-bottom: 4px;
  color: #82919a;
  font-size: 11px;
}

.image-frame {
  position: relative;
  display: grid;
  place-items: center;
  aspect-ratio: var(--image-ratio, 16 / 9);
  margin: 26px 0;
  overflow: hidden;
  border: 1px solid #ccd7dc;
  border-radius: 6px;
  background: #eef4f6;
  box-shadow: var(--shadow);
}

.image-frame img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.image-frame button {
  position: absolute;
  right: 12px;
  bottom: 12px;
  padding: 7px 10px;
  color: white;
  background: rgba(20, 33, 42, 0.84);
  border: 0;
  border-radius: 5px;
}

.image-caption {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  margin: -10px 0 28px;
  color: var(--muted);
  font-size: 12px;
}

.band {
  margin: 30px 0;
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--soft);
}

.band h3:first-child { margin-top: 0; }

.two-col {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  gap: 30px;
}

.three-col {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.topic-card {
  display: flex;
  flex-direction: column;
  min-height: 180px;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: white;
}

.topic-card .num {
  color: var(--teal);
  font-size: 12px;
  font-weight: 850;
}

.topic-card h3 { margin: 10px 0 8px; }
.topic-card p { color: var(--muted); font-size: 14px; }
.topic-card a { margin-top: auto; color: var(--teal); text-decoration: none; font-weight: 700; }

.note {
  margin: 22px 0;
  padding: 16px 18px;
  border-left: 4px solid var(--teal);
  background: var(--teal-soft);
}

.note.warning { border-left-color: var(--amber); background: var(--amber-soft); }
.note.danger { border-left-color: var(--coral); background: var(--coral-soft); }
.note strong { display: block; margin-bottom: 4px; }

.step-list { counter-reset: steps; list-style: none; margin: 20px 0; padding: 0; }
.step-list li { position: relative; min-height: 58px; padding: 4px 0 18px 48px; }
.step-list li::before {
  counter-increment: steps;
  content: counter(steps);
  position: absolute;
  left: 0;
  top: 0;
  display: grid;
  place-items: center;
  width: 30px;
  height: 30px;
  color: white;
  background: var(--teal);
  border-radius: 50%;
  font-weight: 800;
}

.chip-row { display: flex; flex-wrap: wrap; gap: 7px; margin: 12px 0; }

.chip {
  display: inline-flex;
  align-items: center;
  min-height: 26px;
  max-width: 100%;
  padding: 3px 8px;
  color: #27504d;
  background: var(--teal-soft);
  border: 1px solid #b7ddd8;
  border-radius: 4px;
  font: 12px/1.35 Consolas, "SFMono-Regular", monospace;
  overflow-wrap: anywhere;
}

code {
  padding: 2px 5px;
  color: #9a3e37;
  background: var(--coral-soft);
  border-radius: 3px;
  font: 0.88em Consolas, "SFMono-Regular", monospace;
  overflow-wrap: anywhere;
  word-break: break-word;
}

.data-flow {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 112px;
  gap: 20px;
  align-items: center;
  min-height: 250px;
  padding: 20px;
  background: white;
  border: 1px solid var(--line);
  border-radius: 6px;
}

.flow-list { display: grid; gap: 9px; }
.flow-item { padding: 8px 10px; border: 1px solid #bcd4e9; border-radius: 5px; color: #275b86; background: var(--sky-soft); font-size: 12px; }
.flow-host { display: grid; place-items: center; min-height: 112px; padding: 10px; text-align: center; color: #126058; background: var(--teal-soft); border: 2px solid #75c7bf; border-radius: 6px; font-weight: 800; }

.invariant-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); border: 1px solid var(--line); border-radius: 6px; }
.invariant { padding: 18px; border-right: 1px solid var(--line); }
.invariant:last-child { border-right: 0; }
.invariant strong { display: block; margin-bottom: 5px; font-size: 14px; }
.invariant span { color: var(--muted); font-size: 12px; }

.bar-chart { display: grid; gap: 18px; margin: 24px 0; }
.bar-row { display: grid; grid-template-columns: 180px minmax(0, 1fr) 100px; gap: 14px; align-items: center; font-size: 13px; }
.bar-track { height: 18px; background: #e6ecef; border-radius: 3px; overflow: hidden; }
.bar { height: 100%; background: var(--coral); }
.bar.efficient { width: 18%; background: var(--teal); }

.table-wrap { margin: 22px 0; overflow-x: auto; border: 1px solid var(--line); border-radius: 6px; }

table { width: 100%; border-collapse: collapse; font-size: 13px; }
th, td { padding: 12px 14px; text-align: left; vertical-align: top; border-bottom: 1px solid var(--line); }
th { color: #40505b; background: #edf2f4; font-size: 12px; }
tr:last-child td { border-bottom: 0; }
tbody tr:hover { background: #f8fbfb; }

.param-table td:first-child { min-width: 220px; font-family: Consolas, "SFMono-Regular", monospace; color: #174f4a; }

.filters {
  position: sticky;
  top: calc(var(--topbar) + 8px);
  z-index: 20;
  display: grid;
  grid-template-columns: minmax(220px, 1fr) 190px 150px;
  gap: 10px;
  margin: 22px 0;
  padding: 12px;
  background: rgba(255, 255, 255, 0.96);
  border: 1px solid var(--line);
  border-radius: 6px;
  box-shadow: 0 8px 24px rgba(23, 42, 50, 0.08);
}

.filters input, .filters select {
  width: 100%;
  height: 38px;
  padding: 0 10px;
  color: var(--ink);
  background: white;
  border: 1px solid #cbd7dc;
  border-radius: 5px;
}

.function-list { display: grid; gap: 10px; }

.function-item { border: 1px solid var(--line); border-radius: 6px; background: white; }

.function-item summary {
  display: grid;
  grid-template-columns: minmax(220px, 0.7fr) 120px minmax(0, 1.5fr) 24px;
  gap: 14px;
  align-items: center;
  padding: 15px 16px;
  list-style: none;
  cursor: pointer;
}

.function-item summary::-webkit-details-marker { display: none; }
.function-name { overflow-wrap: anywhere; color: #104e49; font: 700 13px Consolas, "SFMono-Regular", monospace; }
.function-group { color: var(--muted); font-size: 12px; }
.function-summary { color: #4b5c67; font-size: 13px; }
.function-caret { color: #75868f; text-align: center; }
.function-item[open] .function-caret { transform: rotate(90deg); }
.function-body { padding: 0 16px 16px; border-top: 1px solid var(--line); }
.function-body p { margin: 12px 0 6px; color: var(--muted); font-size: 13px; }

.workflow-jump {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  margin: 24px 0 58px;
  border: 1px solid var(--line);
  border-radius: 6px;
  overflow: hidden;
}

.workflow-jump a {
  min-height: 74px;
  padding: 13px;
  color: #33444e;
  background: white;
  border-right: 1px solid var(--line);
  text-decoration: none;
  font-size: 13px;
  font-weight: 750;
}

.workflow-jump a:last-child { border-right: 0; }
.workflow-jump a:hover { color: #075c54; background: var(--teal-soft); }
.workflow-jump span { display: block; margin-bottom: 5px; color: var(--teal); font: 800 11px Consolas, monospace; }

.workflow-deep {
  margin: 76px 0 104px;
  padding-top: 28px;
  border-top: 3px solid var(--ink);
}

.workflow-deep-head {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  align-items: flex-start;
  margin-bottom: 24px;
}

.workflow-deep-head h2 { margin: 0 0 8px; padding: 0; }
.workflow-deep-head h2::before { content: none; }
.runtime-badge { padding: 7px 10px; color: #155e58; background: var(--teal-soft); border: 1px solid #abd9d4; border-radius: 4px; font: 700 11px Consolas, monospace; }

.contract-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin: 26px 0 38px;
  border: 1px solid var(--line);
  border-radius: 6px;
  overflow: hidden;
}

.contract-cell { min-width: 0; padding: 18px; border-right: 1px solid var(--line); background: #fbfcfc; }
.contract-cell:last-child { border-right: 0; }
.contract-cell > span, .workflow-outcomes span, .function-contract span {
  display: block;
  margin-bottom: 7px;
  color: #64747e;
  font-size: 10px;
  font-weight: 850;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.contract-cell p { margin: 0; font-size: 13px; }

.workflow-timeline { margin: 20px 0 38px; border-top: 1px solid var(--line); }
.workflow-step { display: grid; grid-template-columns: 58px minmax(0, 1fr); border-bottom: 1px solid var(--line); }
.workflow-step-index { padding: 22px 14px; color: var(--teal); background: #f2f7f7; border-right: 1px solid var(--line); font: 800 13px Consolas, monospace; }
.workflow-step-main { min-width: 0; padding: 20px 22px 24px; }
.workflow-step-main > p { max-width: 900px; color: #40515c; font-size: 14px; }
.workflow-step-title { display: flex; justify-content: space-between; gap: 20px; align-items: flex-start; }
.workflow-step-title small { color: var(--coral); font-size: 11px; font-weight: 800; }
.workflow-step-title h4 { margin: 3px 0 10px; font-size: 18px; }
.workflow-step-title a { color: var(--teal); text-decoration: none; white-space: nowrap; font-size: 12px; font-weight: 700; }

.step-contract { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); margin: 16px 0 0; border: 1px solid var(--line); }
.step-contract div { min-width: 0; padding: 12px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.step-contract div:nth-child(2n) { border-right: 0; }
.step-contract div:nth-last-child(-n+2) { border-bottom: 0; }
.step-contract dt { margin-bottom: 4px; color: #72808a; font-size: 10px; font-weight: 850; text-transform: uppercase; }
.step-contract dd { margin: 0; overflow-wrap: anywhere; color: #34454f; font-size: 12px; }
.step-contract div:last-child { background: var(--amber-soft); }

.workflow-outcomes { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.workflow-outcomes > div { padding: 18px; border-right: 1px solid var(--line); }
.workflow-outcomes > div:last-child { border-right: 0; }
.workflow-outcomes p { margin: 0; color: #475862; font-size: 13px; }

.function-contract { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); margin-top: 16px; border: 1px solid var(--line); }
.function-contract > div { min-width: 0; padding: 13px 15px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.function-contract > div:nth-child(2n) { border-right: 0; }
.function-contract > div:nth-last-child(-n+2) { border-bottom: 0; }
.function-contract p { margin: 0; overflow-wrap: anywhere; color: #3f505a; line-height: 1.55; }
.function-contract .danger-cell { background: var(--coral-soft); }
.function-foot { display: grid; grid-template-columns: minmax(0, 1fr) auto auto; gap: 16px; align-items: center; margin-top: 14px; color: var(--muted); font-size: 11px; }
.function-foot strong { display: block; margin-bottom: 3px; color: #43535d; }
.function-foot .chip-row { margin: 0; }
.function-foot > code { max-width: 360px; overflow-wrap: anywhere; }

.technical-steps { list-style: none; margin: 24px 0; padding: 0; border-top: 1px solid var(--line); }
.technical-steps li { display: grid; grid-template-columns: 54px minmax(0, 1fr); border-bottom: 1px solid var(--line); }
.technical-steps li > span { padding: 18px 12px; color: var(--teal); background: #f2f7f7; border-right: 1px solid var(--line); font: 800 12px Consolas, monospace; }
.technical-steps li > div { padding: 15px 18px; }
.technical-steps strong { font-size: 14px; }
.technical-steps p { margin: 3px 0 0; color: var(--muted); font-size: 13px; }

.code-flow, .formula {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
  align-items: center;
  margin: 24px 0;
  padding: 18px;
  background: #16232c;
  border-radius: 6px;
  color: #dbe6ea;
}
.code-flow code, .formula code { color: #a8eee6; background: #223640; }
.code-flow b, .formula b { color: #7d949f; }
.formula > span { font-weight: 800; }

.scope-matrix { margin: 24px 0; border: 1px solid var(--line); border-radius: 6px; overflow-x: auto; }
.scope-row { display: grid; grid-template-columns: 140px 1.25fr 1fr 1fr; min-width: 760px; border-bottom: 1px solid var(--line); }
.scope-row:last-child { border-bottom: 0; }
.scope-row > * { min-width: 0; padding: 11px 13px; border-right: 1px solid var(--line); font-size: 12px; }
.scope-row > *:last-child { border-right: 0; }
.scope-row.head { color: #40505b; background: #edf2f4; font-weight: 800; }

.scheduler-diagram { display: grid; grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr) auto minmax(0, 1.2fr); gap: 14px; align-items: center; margin: 26px 0; }
.scheduler-source, .scheduler-queue, .scheduler-pools > div { padding: 16px; border: 1px solid var(--line); border-radius: 6px; }
.scheduler-source { background: var(--sky-soft); }
.scheduler-queue { background: var(--amber-soft); }
.scheduler-pools { display: grid; gap: 8px; }
.scheduler-pools > div:first-child { background: var(--teal-soft); }
.scheduler-pools > div:last-child { background: var(--coral-soft); }
.scheduler-diagram strong, .scheduler-diagram span, .scheduler-diagram small { display: block; }
.scheduler-diagram span { margin: 5px 0; color: #3f505b; font: 12px Consolas, monospace; }
.scheduler-diagram small { color: var(--muted); }

.failure-ladder { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); margin: 24px 0; border: 1px solid var(--line); border-radius: 6px; overflow: hidden; }
.failure-ladder > div { padding: 16px; border-right: 1px solid var(--line); }
.failure-ladder > div:last-child { border-right: 0; }
.failure-ladder span { display: grid; place-items: center; width: 25px; height: 25px; margin-bottom: 10px; color: white; background: var(--coral); border-radius: 50%; font-size: 11px; font-weight: 800; }
.failure-ladder strong { display: block; font-size: 13px; }
.failure-ladder p { margin: 6px 0 0; color: var(--muted); font-size: 12px; }

.scope-toggle { display: inline-flex; gap: 3px; padding: 3px; background: var(--soft); border: 1px solid var(--line); border-radius: 6px; }
.scope-toggle button { padding: 6px 10px; color: var(--muted); background: transparent; border: 0; border-radius: 4px; font-size: 12px; }
.scope-toggle button.active { color: white; background: var(--teal); }

.gallery { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; }
.gallery .image-frame { margin: 0; box-shadow: none; }
.gallery figcaption { padding: 10px 12px; color: var(--muted); background: white; border-top: 1px solid var(--line); font-size: 12px; }

.route-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  margin: 4px 0 54px;
}

.route-panel {
  position: relative;
  display: flex;
  flex-direction: column;
  min-height: 294px;
  padding: 30px;
  color: var(--ink);
  background: white;
  border: 1px solid var(--line);
  border-top: 5px solid var(--teal);
  border-radius: 7px;
  text-decoration: none;
  box-shadow: 0 14px 38px rgba(24, 43, 51, 0.08);
  transition: transform 160ms ease, box-shadow 160ms ease;
}

.route-panel:hover {
  transform: translateY(-3px);
  box-shadow: 0 20px 48px rgba(24, 43, 51, 0.13);
}

.route-panel.route-technical { border-top-color: var(--coral); }
.route-panel .route-label { color: var(--teal); font-size: 12px; font-weight: 850; }
.route-panel.route-technical .route-label { color: #b54d46; }
.route-panel h2 { margin: 22px 0 12px; padding: 0; font-size: 29px; }
.route-panel h2::before { content: none; }
.route-panel p { max-width: 470px; margin: 0; color: var(--muted); }
.route-action { display: flex; align-items: center; gap: 9px; margin-top: auto; padding-top: 28px; font-weight: 800; }
.route-action b { color: var(--teal); font-size: 20px; }
.route-technical .route-action b { color: var(--coral); }

.plain-strip {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin: 26px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.plain-strip > div { padding: 20px; border-right: 1px solid var(--line); }
.plain-strip > div:last-child { border-right: 0; }
.plain-strip strong, .plain-strip span { display: block; }
.plain-strip strong { margin-bottom: 5px; font-size: 14px; }
.plain-strip span { color: var(--muted); font-size: 13px; }

.choice-strip {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin: 22px 0;
  border: 1px solid var(--line);
  border-radius: 7px;
  overflow: hidden;
}

.choice-strip > div { min-width: 0; padding: 22px; border-right: 1px solid var(--line); background: #fbfcfc; }
.choice-strip > div:last-child { border-right: 0; background: #fffafa; }
.choice-strip span, .choice-strip strong { display: block; }
.choice-strip span { margin-bottom: 8px; color: var(--teal); font-size: 12px; font-weight: 850; }
.choice-strip strong { font-size: 18px; }
.choice-strip p { margin: 7px 0 0; color: var(--muted); font-size: 13px; }

.tutorial-banner, .technical-intro {
  display: grid;
  grid-template-columns: 190px minmax(0, 1fr);
  gap: 24px;
  align-items: center;
  margin: 0 0 36px;
  padding: 18px 20px;
  background: var(--teal-soft);
  border-left: 4px solid var(--teal);
}

.tutorial-banner strong, .technical-intro span { font-size: 13px; font-weight: 850; }
.tutorial-banner span, .technical-intro p { margin: 0; color: #3f5b59; font-size: 14px; }
.technical-intro { background: var(--soft); border-left-color: var(--coral); }
.technical-intro p { color: var(--muted); }

.field-guide td:first-child { min-width: 190px; }
.field-guide td:nth-child(2) { min-width: 300px; }

.setting-list { border-top: 1px solid var(--line); }
.setting-list article { display: grid; grid-template-columns: 220px minmax(0, 1fr); gap: 28px; padding: 22px 0; border-bottom: 1px solid var(--line); }
.setting-list h3 { margin: 0; font-size: 17px; }
.setting-list p { margin: 0; color: var(--muted); }
.setting-list pre { grid-column: 2; margin: 0; }

.plain-check { display: grid; gap: 0; margin: 20px 0; padding: 0; list-style: none; border-top: 1px solid var(--line); }
.plain-check li { position: relative; padding: 15px 10px 15px 34px; border-bottom: 1px solid var(--line); }
.plain-check li::before { content: "✓"; position: absolute; left: 8px; color: var(--teal); font-weight: 900; }

.architecture-flow {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  margin: 26px 0 32px;
  border: 1px solid var(--line);
  border-radius: 7px;
  overflow: hidden;
}

.architecture-flow.compact { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.architecture-flow > div { min-height: 88px; padding: 14px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); background: #fbfcfc; }
.architecture-flow > div:nth-child(4n) { border-right: 0; }
.architecture-flow > div:nth-last-child(-n+4) { border-bottom: 0; }
.architecture-flow.compact > div { border-bottom: 1px solid var(--line); }
.architecture-flow.compact > div:nth-child(3n) { border-right: 0; }
.architecture-flow.compact > div:nth-child(4n) { border-right: 1px solid var(--line); }
.architecture-flow.compact > div:nth-last-child(-n+3) { border-bottom: 0; }
.architecture-flow span, .architecture-flow strong { display: block; }
.architecture-flow span { margin-bottom: 9px; color: var(--teal); font: 800 11px Consolas, monospace; }
.architecture-flow strong { font-size: 13px; }

.architecture-map {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr) auto minmax(0, 1.1fr) auto minmax(0, 1fr);
  gap: 10px;
  align-items: center;
  margin: 26px 0;
}

.architecture-map > b { color: #7b8b94; text-align: center; }
.architecture-node { min-height: 146px; padding: 17px; border: 1px solid var(--line); border-radius: 6px; }
.architecture-node span, .architecture-node strong, .architecture-node small { display: block; }
.architecture-node span { margin-bottom: 16px; color: var(--teal); font: 800 11px Consolas, monospace; }
.architecture-node strong { font-size: 15px; }
.architecture-node small { margin-top: 8px; color: var(--muted); line-height: 1.55; }
.architecture-node.ui { background: var(--sky-soft); }
.architecture-node.pi { background: var(--teal-soft); }
.architecture-node.host { background: var(--amber-soft); }
.architecture-node.workers { background: var(--coral-soft); }

.workflow-step-main h3 { margin: 0 0 8px; font-size: 18px; }
.workflow-step-main > p:last-child { margin-bottom: 0; }
.source-note { margin-top: 28px; padding-top: 18px; color: var(--muted); border-top: 1px solid var(--line); font-size: 13px; }

.copy-editor-bar {
  position: fixed;
  right: 22px;
  bottom: 20px;
  z-index: 70;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 7px;
  max-width: calc(100vw - 44px);
  padding: 9px;
  color: white;
  background: #17242d;
  border: 1px solid #41545f;
  border-radius: 7px;
  box-shadow: 0 18px 48px rgba(7, 16, 21, 0.28);
}

.copy-editor-bar[hidden] { display: none; }
.copy-editor-bar span { min-width: 84px; padding: 0 6px; color: #bcd0d6; font-size: 12px; }
.copy-editor-bar button {
  min-height: 34px;
  padding: 0 10px;
  color: #eef4f6;
  background: #263944;
  border: 1px solid #4b626e;
  border-radius: 5px;
  font-size: 12px;
}

.reference-figure {
  margin: 28px 0;
}

.reference-figure .image-frame {
  margin: 0;
}

.reference-figure .image-caption {
  margin: 10px 0 0;
}

.reference-figure.compact {
  width: min(100%, var(--image-max-width, 780px));
}

.reference-pair {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  align-items: start;
  gap: 22px;
  margin: 28px 0;
}

.reference-pair .reference-figure {
  width: 100%;
  margin: 0;
}

.reference-pair .image-caption {
  display: grid;
  gap: 3px;
}

.reference-pair .image-caption span:last-child {
  color: #87979f;
}
.copy-editor-bar button:hover { background: #31505b; border-color: #6b9295; }
.copy-editor-bar button:last-of-type { color: #ffd8d4; }

[data-copy-edit-key][contenteditable="true"] {
  outline: 1px dashed rgba(13, 143, 131, 0.58);
  outline-offset: 3px;
  border-radius: 2px;
  cursor: text;
}

[data-copy-edit-key][contenteditable="true"]:hover { background: rgba(230, 245, 242, 0.66); }
[data-copy-edit-key][contenteditable="true"]:focus {
  outline: 2px solid var(--teal);
  background: white;
  box-shadow: 0 0 0 5px rgba(13, 143, 131, 0.10);
}

.copy-editing .copy-edit-toggle { opacity: 0.72; }
.copy-editing .content a, .copy-editing .sidebar a { cursor: text; }

.term-layer-map {
  display: grid;
  grid-template-columns: minmax(120px, 1fr) auto minmax(120px, 1fr) auto minmax(120px, 1fr) auto minmax(120px, 1fr) auto minmax(120px, 1fr);
  gap: 9px;
  align-items: stretch;
  margin: 24px 0 44px;
}

.term-layer-map > div {
  min-width: 0;
  padding: 16px;
  background: #f8fbfb;
  border: 1px solid var(--line);
  border-top: 4px solid var(--teal);
  border-radius: 6px;
}

.term-layer-map > div:nth-of-type(3) { border-top-color: #d48a3c; }
.term-layer-map > div:nth-of-type(4) { border-top-color: var(--coral); }
.term-layer-map > div:nth-of-type(5) { border-top-color: #5c82a8; }
.term-layer-map > b { align-self: center; color: #81929b; text-align: center; }
.term-layer-map span, .term-layer-map strong, .term-layer-map small { display: block; }
.term-layer-map span { margin-bottom: 15px; color: var(--teal); font: 800 11px Consolas, monospace; }
.term-layer-map strong { font-size: 14px; }
.term-layer-map small { margin-top: 7px; color: var(--muted); font: 12px/1.45 Consolas, monospace; overflow-wrap: anywhere; }

.term-filters {
  display: grid;
  grid-template-columns: minmax(240px, 1fr) minmax(180px, 280px) auto;
  gap: 10px;
  align-items: center;
  margin: 20px 0 36px;
}

.term-filters input, .term-filters select {
  min-width: 0;
  height: 42px;
  padding: 0 12px;
  color: var(--ink);
  background: white;
  border: 1px solid #b9c8cf;
  border-radius: 6px;
}

.term-filters input:focus, .term-filters select:focus { outline: 2px solid rgba(13, 143, 131, 0.24); border-color: var(--teal); }
.term-filters span { color: var(--muted); font-size: 12px; white-space: nowrap; }
.term-category[hidden] { display: none; }
.term-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; margin: 20px 0 52px; }

.term-card {
  min-width: 0;
  overflow: hidden;
  background: white;
  border: 1px solid var(--line);
  border-radius: 6px;
  box-shadow: 0 8px 22px rgba(24, 43, 51, 0.05);
}

.term-card[hidden] { display: none; }
.term-card header { padding: 16px 18px; background: #f4f8f8; border-bottom: 1px solid var(--line); }
.term-card header code { color: #0a625b; font-size: 17px; font-weight: 850; white-space: normal; overflow-wrap: anywhere; }
.term-card dl { margin: 0; }
.term-card dl > div { display: grid; grid-template-columns: 118px minmax(0, 1fr); gap: 13px; padding: 14px 18px; border-bottom: 1px solid #e5ecef; }
.term-card dl > div:last-child { border-bottom: 0; }
.term-card dt { color: #647983; font-size: 11px; font-weight: 850; text-transform: uppercase; }
.term-card dd { min-width: 0; margin: 0; color: #2c424b; font-size: 13px; line-height: 1.65; }
.term-card .term-warning { background: #fff9f3; }
.term-card .term-warning dt { color: #a4612f; }
.terminology-entry a { color: #0b6f67; font-weight: 800; }

.search-dialog {
  width: min(760px, calc(100vw - 32px));
  max-height: min(720px, calc(100vh - 40px));
  padding: 0;
  color: var(--ink);
  border: 1px solid #bbc8ce;
  border-radius: 8px;
  box-shadow: 0 28px 90px rgba(12, 24, 31, 0.35);
}

.search-dialog::backdrop { background: rgba(16, 28, 36, 0.66); }
.search-head { display: flex; gap: 10px; padding: 14px; border-bottom: 1px solid var(--line); }
.search-head input { flex: 1; height: 42px; padding: 0 12px; border: 1px solid #b9c8ce; border-radius: 5px; }
.icon-button { width: 42px; height: 42px; color: var(--muted); background: white; border: 1px solid #b9c8ce; border-radius: 5px; }
.search-results { max-height: 560px; overflow-y: auto; padding: 8px; }
.search-result { display: block; padding: 11px 12px; border-radius: 5px; text-decoration: none; }
.search-result:hover { background: var(--teal-soft); }
.search-result strong { display: block; font-size: 14px; }
.search-result span { color: var(--muted); font-size: 12px; }
.search-empty { padding: 30px; color: var(--muted); text-align: center; }

.lightbox {
  width: min(1500px, calc(100vw - 36px));
  padding: 10px;
  background: #111a20;
  border: 0;
  border-radius: 8px;
}

.lightbox::backdrop { background: rgba(6, 12, 16, 0.88); }
.lightbox img { display: block; width: 100%; max-height: calc(100vh - 90px); object-fit: contain; }
.lightbox .icon-button { position: absolute; top: 18px; right: 18px; color: white; background: #26363f; border-color: #4e606a; }

.footer { margin-top: 72px; padding-top: 24px; color: #78868f; border-top: 1px solid var(--line); font-size: 12px; }

@media (max-width: 1240px) {
  .layout { padding-right: 42px; }
  .toc { display: none; }
}

@media (max-width: 900px) {
  :root { --topbar: 58px; }
  .topbar { grid-template-columns: 44px minmax(0, 1fr); gap: 10px; padding: 0 184px 0 12px; }
  .brand { display: none !important; }
  .topmeta {
    position: fixed;
    top: 12px;
    right: 12px;
    bottom: auto;
    z-index: 58;
    display: flex;
    gap: 8px;
  }
  .topmeta > span, .topmeta > a { display: none; }
  .copy-editing .topmeta { display: none; }
  .search-trigger { min-width: 0; overflow: hidden; white-space: nowrap; }
  .search-trigger > span:nth-child(2) { overflow: hidden; white-space: nowrap; text-overflow: ellipsis; }
  .search-trigger .key { display: none; }
  .menu-button { display: block; }
  .sidebar { transform: translateX(-100%); transition: transform 180ms ease; box-shadow: var(--shadow); }
  body.nav-open .sidebar { transform: translateX(0); }
  .layout { padding: calc(var(--topbar) + 24px) 20px 60px; }
  .metric-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .metric:nth-child(2) { border-right: 0; }
  .metric:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
  .workflow-rail { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .workflow-rail.stage-selector { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .workflow-stage:nth-child(3)::after { content: none; }
  .two-col, .three-col, .gallery, .route-grid, .reference-pair { grid-template-columns: 1fr; }
  pre.band { max-width: 100%; overflow-x: auto; }
  pre.band code { white-space: pre-wrap; overflow-wrap: anywhere; word-break: break-word; }
  .plain-strip { grid-template-columns: 1fr; }
  .plain-strip > div { border-right: 0; border-bottom: 1px solid var(--line); }
  .plain-strip > div:last-child { border-bottom: 0; }
  .architecture-map { grid-template-columns: 1fr; }
  .architecture-map > b { transform: rotate(90deg); }
  .invariant-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .invariant:nth-child(2) { border-right: 0; }
  .invariant:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
  .filters { grid-template-columns: 1fr; position: static; }
  .function-item summary { grid-template-columns: minmax(160px, 1fr) 100px 24px; }
  .function-summary { grid-column: 1 / -1; }
  .workflow-jump { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .workflow-jump a { border-bottom: 1px solid var(--line); }
  .contract-grid, .workflow-outcomes { grid-template-columns: 1fr; }
  .contract-cell, .workflow-outcomes > div { border-right: 0; border-bottom: 1px solid var(--line); }
  .contract-cell:last-child, .workflow-outcomes > div:last-child { border-bottom: 0; }
  .scheduler-diagram { grid-template-columns: 1fr; }
  .scheduler-diagram > b { transform: rotate(90deg); text-align: center; }
  .failure-ladder { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .failure-ladder > div:nth-child(2) { border-right: 0; }
  .failure-ladder > div:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
  .function-foot { grid-template-columns: 1fr; }
  .term-layer-map { grid-template-columns: 1fr; }
  .term-layer-map > b { transform: rotate(90deg); }
  .term-filters, .term-grid { grid-template-columns: 1fr; }
}

@media (max-width: 560px) {
  h1 { overflow-wrap: anywhere; font-size: 30px; }
  .search-trigger > span:nth-child(2) { font-size: 0; }
  .search-trigger > span:nth-child(2)::after { content: "搜索指南"; font-size: 14px; }
  html[lang="en"] .search-trigger > span:nth-child(2)::after { content: "Search"; }
  h2 { margin-top: 48px; font-size: 24px; }
  .page-subtitle { font-size: 16px; }
  .metric-grid { grid-template-columns: 1fr; }
  .metric, .metric:nth-child(2) { border-right: 0; border-bottom: 1px solid var(--line); }
  .metric:last-child { border-bottom: 0; }
  .workflow-rail { grid-template-columns: 1fr; gap: 12px; }
  .workflow-rail.stage-selector { grid-template-columns: 1fr; }
  .workflow-stage::after, .workflow-stage:nth-child(3)::after { content: "↓"; right: 50%; bottom: -17px; top: auto; }
  .workflow-stage:last-child::after { content: none; }
  .invariant-grid { grid-template-columns: 1fr; }
  .invariant, .invariant:nth-child(2) { border-right: 0; border-bottom: 1px solid var(--line); }
  .invariant:last-child { border-bottom: 0; }
  .bar-row { grid-template-columns: 1fr; gap: 6px; }
  .function-item summary { grid-template-columns: minmax(0, 1fr) 24px; }
  .function-group, .function-summary { grid-column: 1 / -1; }
  .workflow-deep-head { display: block; }
  .runtime-badge { display: inline-block; margin-top: 14px; }
  .workflow-jump { grid-template-columns: 1fr; }
  .workflow-jump a { border-right: 0; }
  .workflow-step { grid-template-columns: 42px minmax(0, 1fr); }
  .workflow-step-index { padding: 17px 9px; }
  .workflow-step-main { padding: 16px 14px 20px; }
  .workflow-step-title { display: block; }
  .workflow-step-title a { display: inline-block; margin-bottom: 8px; }
  .step-contract, .function-contract { grid-template-columns: 1fr; }
  .step-contract div, .step-contract div:nth-child(2n), .function-contract > div, .function-contract > div:nth-child(2n) { border-right: 0; border-bottom: 1px solid var(--line); }
  .step-contract div:last-child, .function-contract > div:last-child { border-bottom: 0; }
  .failure-ladder { grid-template-columns: 1fr; }
  .failure-ladder > div, .failure-ladder > div:nth-child(2) { border-right: 0; border-bottom: 1px solid var(--line); }
  .failure-ladder > div:last-child { border-bottom: 0; }
  .code-flow, .formula { align-items: flex-start; }
  .topmeta span { display: none; }
  .route-panel { min-height: 250px; padding: 22px; }
  .route-panel h2 { margin-top: 16px; font-size: 24px; }
  .choice-strip { grid-template-columns: 1fr; }
  .choice-strip > div { border-right: 0; border-bottom: 1px solid var(--line); }
  .choice-strip > div:last-child { border-bottom: 0; }
  .tutorial-banner, .technical-intro, .setting-list article { grid-template-columns: 1fr; gap: 8px; }
  .setting-list pre { grid-column: 1; }
  .architecture-flow, .architecture-flow.compact { grid-template-columns: 1fr; }
  .architecture-flow > div, .architecture-flow.compact > div, .architecture-flow.compact > div:nth-child(4n) { border-right: 0; border-bottom: 1px solid var(--line); }
  .architecture-flow > div:last-child, .architecture-flow.compact > div:last-child { border-bottom: 0; }
  .copy-editor-bar { right: 10px; bottom: 10px; left: 10px; max-width: none; }
  .copy-editor-bar span { flex: 1 0 100%; }
  .term-card dl > div { grid-template-columns: 1fr; gap: 5px; }
}