@import url("https://fonts.googleapis.com/css2?family=Noto+Serif+TC:wght@300;400;500;700&family=JetBrains+Mono:wght@400;500&display=swap");

:root {
  --ink: #1c211c !important;
  --muted: #58645d !important;
  --paper: #f6f0df !important;
  --paper-2: #ece4cf !important;
  --panel: rgba(252, 248, 238, 0.92) !important;
  --jade: #1f6d5c !important;
  --jade-2: #17493f !important;
  --cinnabar: #9e4337 !important;
  --gold: #b69042 !important;
  --river: #527b8a !important;
  --line: rgba(28, 33, 28, 0.14) !important;
  --line-strong: rgba(28, 33, 28, 0.22) !important;
  --shadow: 0 18px 56px rgba(20, 28, 23, 0.14) !important;
  --r: 10px !important;
  --r-sm: 8px !important;
  --w: 960px !important;
  --t: 0.18s ease !important;
  --serif: "Noto Serif TC", "Source Han Serif TC", "Microsoft JhengHei", serif !important;
  --mono: "JetBrains Mono", monospace !important;

  --paper-strong: var(--paper) !important;
  --ink-soft: var(--muted) !important;
  --accent: var(--jade) !important;
  --accent-strong: var(--jade-2) !important;
  --accent-warm: var(--gold) !important;
  --rose: var(--cinnabar) !important;
  --radius-xl: 28px !important;
  --radius-lg: 22px !important;
  --radius-md: 16px !important;
  --content-width: 960px !important;
  --site-width: 960px !important;
  --site-ink: var(--ink) !important;
  --site-muted: var(--muted) !important;
  --site-line: var(--line) !important;
  --site-accent: var(--jade) !important;
  --site-accent-strong: var(--jade-2) !important;
  --site-shadow: var(--shadow) !important;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink) !important;
  font-family: var(--serif) !important;
  font-size: 0.9rem !important;
  line-height: 1.82 !important;
  background:
    linear-gradient(135deg, rgba(31, 109, 92, 0.09), transparent 30%),
    linear-gradient(220deg, rgba(158, 67, 55, 0.07), transparent 28%),
    repeating-linear-gradient(
      0deg,
      rgba(28, 33, 28, 0.022), rgba(28, 33, 28, 0.022) 1px,
      transparent 1px, transparent 18px
    ),
    var(--paper) !important;
  overflow-x: hidden;
  animation: pageEnter 0.45s ease both;
}

body::before {
  content: none;
}

body > *:not(#page-overlay):not(script):not(style):not(noscript) {
  position: relative;
  z-index: 1;
  width: min(calc(100% - 48px), var(--content-width));
  margin-left: auto;
  margin-right: auto;
}

a {
  color: var(--jade-2);
  text-decoration: none;
}

a:hover {
  color: var(--jade);
}

h1,
h2,
h3 {
  font-family: var(--serif) !important;
  letter-spacing: 0.01em;
  margin: 0;
}

h1 {
  font-size: clamp(1.85rem, 3.2vw, 2.7rem) !important;
  line-height: 1.28 !important;
  max-width: 11.5em;
}

h2 {
  font-size: clamp(1.28rem, 2vw, 1.8rem) !important;
  line-height: 1.22 !important;
}

h3 {
  font-size: 1.15rem !important;
  line-height: 1.28 !important;
}

p,
li {
  line-height: 1.84;
}

code,
pre {
  font-family: var(--mono);
}

code {
  background: rgba(31, 109, 92, 0.07);
  border-radius: var(--r-sm);
  padding: 2px 6px;
}

pre {
  background: rgba(18, 29, 40, 0.96);
  color: #e8f0f7;
  border: 1px solid rgba(28, 33, 28, 0.16);
  border-radius: 18px;
  padding: 16px 18px;
  overflow-x: auto;
  line-height: 1.7;
}

pre code {
  background: transparent;
  color: inherit;
  padding: 0;
  border-radius: 0;
}

blockquote {
  margin: 1.4em 0;
  padding: 12px 18px;
  border-left: 4px solid var(--accent);
  border-radius: 16px;
  background: rgba(13, 122, 115, 0.08);
  color: var(--accent-strong);
}

table {
  width: 100%;
  border-collapse: collapse;
  border-radius: var(--r);
  overflow: hidden;
  margin: 1.4em 0;
  background: rgba(255, 255, 255, 0.54);
  box-shadow: 0 2px 10px rgba(20, 28, 23, 0.04);
}

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

th {
  color: var(--jade-2);
  background: rgba(31, 109, 92, 0.09);
  font-size: 0.92rem;
}

td {
  color: var(--ink-soft);
}

tr:nth-child(even) td {
  background: rgba(31, 109, 92, 0.045);
}

.page {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 280px;
  gap: 28px;
  align-items: start;
  padding: 40px 0 80px;
}

.main-column {
  display: grid;
  gap: 24px;
  min-width: 0;
}

.hero,
.panel,
.toc,
.figure-card,
.callout,
.mini-card,
.stat-card,
.handoff-card,
.agent-card,
.flow-step,
.mode-chip,
.blueprint,
.diagram {
  background: var(--panel);
  border: 1px solid var(--line);
  box-shadow: 0 2px 10px rgba(20, 28, 23, 0.04);
  -webkit-backdrop-filter: none;
  backdrop-filter: none;
}

.hero {
  border-radius: 18px;
  padding: 36px;
  overflow: hidden;
  position: relative;
  isolation: isolate;
}

.hero::after {
  content: none;
}

.hero-grid {
  margin-top: 28px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.panel {
  border-radius: var(--r);
  padding: 28px;
}

.panel > * + * {
  margin-top: 14px;
}

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

.callout {
  border-radius: var(--r);
  padding: 16px 18px;
  border-color: rgba(31, 109, 92, 0.18);
  background: rgba(31, 109, 92, 0.06);
  color: var(--ink);
}

.mini-card,
.stat-card,
.figure-card {
  border-radius: var(--r);
  border: 1px solid var(--line);
}

.mini-card,
.stat-card {
  padding: 18px;
}

.stat-card strong {
  display: block;
  color: var(--jade-2);
  font-size: 1.35rem;
  margin-bottom: 6px;
}

.stat-card span {
  color: var(--muted);
}

.figure-card {
  position: relative;
  padding: 18px;
  background: rgba(255, 255, 255, 0.54);
}

.figure-actions {
  position: absolute;
  top: 14px;
  right: 14px;
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.figure-actions button {
  display: inline-flex;
  align-items: center;
  border: 1px solid rgba(31, 109, 92, 0.18);
  border-radius: var(--r-sm);
  background: rgba(31, 109, 92, 0.07);
  color: var(--jade-2);
  padding: 5px 12px;
  font-family: var(--serif);
  font-size: 0.82rem;
  font-weight: 500;
  cursor: pointer;
}

.figure-actions button:hover {
  border-color: rgba(31, 109, 92, 0.3);
  background: rgba(31, 109, 92, 0.05);
  color: var(--jade);
}

.figure-card figure,
figure.figure-card {
  margin: 0;
}

.figure-card svg,
.figure-card img {
  display: block;
  max-width: 100%;
  height: auto;
}

figcaption {
  color: var(--muted);
  font-size: 0.88rem;
  line-height: 1.65;
  padding-right: 120px;
}

.copy-status {
  min-height: 1.2em;
  margin-top: 10px;
  color: var(--jade-2);
  font-size: 0.84rem;
  font-weight: 700;
  opacity: 0;
  transition: opacity 0.2s ease;
}

.copy-status.is-visible {
  opacity: 1;
}

.split,
.two-col,
.hero-grid,
.agent-card-grid {
  display: grid;
  gap: 16px;
}

.split,
.two-col,
.agent-card-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.agent-card-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.hero-illustration {
  position: relative;
  overflow: hidden;
  border-radius: 32px;
  padding: 32px;
  margin: 0;
}

.hero-illustration::before {
  content: "";
  position: absolute;
  inset: 18px;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(13, 122, 115, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(13, 122, 115, 0.08) 1px, transparent 1px);
  background-size: 28px 28px;
  mask-image: linear-gradient(90deg, transparent, #000 18%, #000 82%, transparent);
}

.diagram {
  border-radius: var(--radius-lg);
  padding: 20px 24px;
  margin: 1.4em 0;
}

.diagram-title {
  font-weight: 700;
  color: var(--accent-strong);
  margin-bottom: 14px;
}

.flow,
.flow-loop {
  display: grid;
  gap: 10px;
}

.flow-step {
  border-radius: 10px;
  padding: 11px 14px;
}

.badge,
.agent-icon,
.gate-badge,
.flow-num {
  background: var(--accent);
  color: #fff;
}

.panel-header {
  background: var(--accent);
  color: #fff;
  font-weight: 700;
  padding: 8px 14px;
  font-size: 0.92em;
}

.panel-header.green {
  background: #127c3f;
}

.panel-header.amber {
  background: #b45309;
}

.panel-header.slate {
  background: #334155;
}

.gate-row {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 14px;
  background: rgba(255, 255, 255, 0.7);
  border: 1px solid var(--line);
  border-radius: 10px;
  margin: 6px 0;
}

.gate-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  padding: 2px 9px;
  font-size: 0.78em;
  font-weight: 700;
  white-space: nowrap;
}

.gate-badge.p0,
.flow-num.red {
  background: #dc2626;
}

.gate-badge.p1,
.flow-num.amber {
  background: #b45309;
}

.gate-badge.p2,
.flow-num.green {
  background: #127c3f;
}

.gate-badge.p3,
.flow-num.slate {
  background: #64748b;
}

.flow-step .badge,
.badge {
  display: inline-block;
  border-radius: 999px;
  padding: 2px 9px;
  font-size: 0.78em;
  font-weight: 700;
  margin-right: 6px;
}

.flow-num {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  flex-shrink: 0;
}

.line {
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
}

.line::after {
  border-color: var(--accent);
}

.quote {
  border-left: 4px solid var(--jade);
  border-radius: 14px;
  background: rgba(31, 109, 92, 0.08);
  color: var(--jade-2);
  font-weight: 700;
  padding: 18px 20px;
  margin: 0;
}

.warning {
  border-left-color: var(--accent-warm);
  background: rgba(182, 144, 66, 0.11);
  color: #744617;
}

.tip-box {
  background: rgba(182, 144, 66, 0.12);
  border: 1px solid rgba(182, 144, 66, 0.28);
  border-radius: var(--r);
  padding: 14px 18px;
  margin: 1.4em 0;
}

.credit {
  color: var(--ink-soft);
  font-size: 0.84rem;
  margin-top: 3em;
  border-top: 1px solid var(--line);
  padding-top: 1em;
}

.nav,
.top-links,
.back-links,
.lang-switch {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
}

.nav {
  margin-top: 34px;
  margin-bottom: 24px;
  padding: 12px 14px;
  background: rgba(255, 255, 255, 0.54);
  border: 1px solid var(--line);
  border-radius: var(--r);
  box-shadow: 0 2px 10px rgba(20, 28, 23, 0.04);
}

.nav a,
.top-links a,
.back-links a,
.lang-switch a {
  text-decoration: none;
  font-weight: 500;
}

.nav a {
  color: var(--muted);
  border: 1px solid transparent;
  background: transparent;
  border-radius: 6px;
  padding: 5px 11px;
  font-family: var(--mono);
  font-size: 0.82rem;
}

.nav a:hover,
.top-links a:hover,
.back-links a:hover,
.lang-switch a:hover,
.toc a:hover {
  text-decoration: none;
}

.top-links,
.back-links,
.lang-switch {
  margin: 0 0 1.4em;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.68rem;
}

.article-tail-actions {
  margin-top: 32px;
}

.toc {
  position: sticky;
  top: 24px;
  align-self: start;
  border-radius: 18px;
  padding: 22px;
}

.toc h2 {
  font-size: 1.15rem !important;
  margin-bottom: 12px;
}

.toc ol {
  margin: 0;
  padding-left: 1.1rem;
}

.toc a {
  color: var(--muted);
  text-decoration: none;
}

.toc .note {
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.7;
}

.footer,
.site-footer {
  text-align: center;
  color: var(--muted);
  font-size: 0.9rem;
  padding: 26px 0 52px;
  border-top: 1px solid var(--line);
  margin-top: 96px;
}

.footer-counter,
.traffic-counter {
  margin-top: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
}

.footer-counter-label,
.traffic-counter-label {
  color: var(--muted);
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.footer-counter img,
.traffic-counter img {
  display: block;
  width: auto;
  height: 28px;
}

#page-overlay {
  position: fixed;
  inset: 0;
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(246, 240, 223, 0.97);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

#page-overlay.active {
  opacity: 1;
  pointer-events: all;
}

.cell-stage {
  position: relative;
  width: 100px;
  height: 60px;
}

.cell-a,
.cell-b {
  position: absolute;
  top: 50%;
  width: 38px;
  height: 38px;
}

.cell-a {
  right: calc(50% + 4px);
  transform: translateY(-50%);
  background: var(--jade);
  opacity: 0.65;
  animation: cellA 2.6s ease-in-out infinite;
}

.cell-b {
  left: calc(50% + 4px);
  transform: translateY(-50%);
  background: rgba(31, 109, 92, 0.45);
  animation: cellB 2.6s ease-in-out infinite;
}

.cell-bridge {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  width: 16px;
  height: 14px;
  background: rgba(31, 109, 92, 0.28);
  border-radius: 50%;
  animation: bridgePulse 2.6s ease-in-out infinite;
}

@keyframes cellA {
  0%, 100% {
    border-radius: 55% 45% 48% 52% / 52% 48% 52% 48%;
    transform: translateY(-50%);
  }

  50% {
    border-radius: 58% 42% 44% 56% / 56% 44% 56% 44%;
    transform: translateY(-48%) translateX(2px);
  }
}

@keyframes cellB {
  0%, 100% {
    border-radius: 45% 55% 52% 48% / 48% 52% 48% 52%;
    transform: translateY(-50%);
  }

  50% {
    border-radius: 42% 58% 56% 44% / 44% 56% 44% 56%;
    transform: translateY(-52%) translateX(-2px);
  }
}

@keyframes bridgePulse {
  0%, 100% {
    width: 14px;
    opacity: 0.35;
  }

  50% {
    width: 22px;
    opacity: 0.6;
  }
}

@media (max-width: 1080px) {
  .page {
    grid-template-columns: 1fr;
  }

  .toc {
    position: relative;
    top: auto;
    order: -1;
  }
}

@media (max-width: 820px) {
  .hero,
  .panel,
  .toc,
  .figure-card {
    padding: 22px;
    border-radius: 24px;
  }

  .hero-grid,
  .split,
  .two-col,
  .agent-card-grid {
    grid-template-columns: 1fr;
  }

  .figure-actions {
    position: static;
    margin-bottom: 12px;
  }

  figcaption {
    padding-right: 0;
  }
}

@media (max-width: 720px) {
  body > *:not(#page-overlay):not(script):not(style):not(noscript) {
    width: min(calc(100% - 28px), var(--content-width));
  }

  .nav {
    border-radius: var(--r);
  }
}

@keyframes pageEnter {
  from {
    opacity: 0;
    transform: translateY(8px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}