:root {
  --bg: #0d1117;
  --bg2: #161b22;
  --bg3: #21262d;
  --surface: #1c2128;
  --surface2: #252b33;
  --line: #30363d;
  --line2: #444c56;
  --ink: #e6edf3;
  --ink2: #8b949e;
  --ink3: #6e7681;
  --primary: #2f81f7;
  --primary-dim: #1a4a8a;
  --primary-soft: rgba(47,129,247,0.12);
  --green: #3fb950;
  --green-soft: rgba(63,185,80,0.12);
  --yellow: #d29922;
  --yellow-soft: rgba(210,153,34,0.12);
  --red: #f85149;
  --red-soft: rgba(248,81,73,0.12);
  --orange: #e3963e;
  --orange-soft: rgba(227,150,62,0.12);
  --purple: #bc8cff;
  --shadow: 0 8px 32px rgba(0,0,0,0.4);
  --radius: 12px;
  --font-mono: ui-monospace, 'Cascadia Code', 'JetBrains Mono', SFMono-Regular, Menlo, Consolas, monospace;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, sans-serif;
  font-size: 15px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* ── NAV ── */
nav {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 32px;
  height: 56px;
  background: rgba(13,17,23,0.88);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 15px;
  color: var(--ink);
  text-decoration: none;
}

.nav-badge {
  padding: 2px 8px;
  border-radius: 999px;
  background: var(--primary-soft);
  border: 1px solid var(--primary-dim);
  color: var(--primary);
  font-size: 11px;
  font-weight: 700;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
  list-style: none;
}

.nav-links a {
  display: inline-flex;
  align-items: center;
  height: 32px;
  padding: 0 14px;
  border-radius: 8px;
  color: var(--ink2);
  font-size: 13px;
  font-weight: 600;
  text-decoration: none;
  transition: color 0.15s, background 0.15s;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--ink);
  background: var(--bg3);
}

/* ── SECTIONS ── */
.page-section {
  display: none;
}
.page-section.active {
  display: block;
}

/* ── HERO ── */
.hero {
  padding: 80px 32px 64px;
  text-align: center;
  max-width: 860px;
  margin: 0 auto;
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 4px 14px;
  border-radius: 999px;
  background: var(--primary-soft);
  border: 1px solid var(--primary-dim);
  color: var(--primary);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin-bottom: 24px;
}

.hero h1 {
  font-size: clamp(32px, 5vw, 52px);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-bottom: 20px;
  background: linear-gradient(135deg, #e6edf3 30%, #8b949e);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-sub {
  font-size: 17px;
  color: var(--ink2);
  max-width: 580px;
  margin: 0 auto 36px;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 56px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  height: 42px;
  padding: 0 22px;
  border-radius: 10px;
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
  text-decoration: none;
  border: none;
  transition: all 0.15s;
}

.btn-primary {
  background: var(--primary);
  color: #fff;
}
.btn-primary:hover { background: #388bfd; }

.btn-outline {
  background: transparent;
  border: 1.5px solid var(--line2);
  color: var(--ink2);
}
.btn-outline:hover { border-color: var(--ink2); color: var(--ink); }

.hero-stats {
  display: flex;
  justify-content: center;
  gap: 48px;
  flex-wrap: wrap;
  padding-top: 32px;
  border-top: 1px solid var(--line);
}

.stat-item {
  text-align: center;
}

.stat-link {
  color: inherit;
  cursor: pointer;
  text-decoration: none;
}

.stat-link * {
  text-decoration: none;
}

.stat-link:hover .stat-num,
.stat-link:focus-visible .stat-num {
  color: #58a6ff;
}

.stat-link:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 8px;
  border-radius: 8px;
}

.stat-num {
  font-size: 28px;
  font-weight: 800;
  color: var(--primary);
  font-variant-numeric: tabular-nums;
}

.stat-label {
  font-size: 12px;
  color: var(--ink3);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-weight: 600;
}

/* ── FEATURE CARDS ── */
.features {
  padding: 0 32px 80px;
  max-width: 1100px;
  margin: 0 auto;
}

.section-title {
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink3);
  margin-bottom: 20px;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
}

.feature-card {
  padding: 24px;
  border-radius: var(--radius);
  background: var(--surface);
  border: 1px solid var(--line);
  transition: border-color 0.15s;
}
.feature-card:hover { border-color: var(--line2); }

.feature-icon {
  font-size: 24px;
  margin-bottom: 12px;
}

.feature-card h3 {
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--ink);
}

.feature-card p {
  font-size: 14px;
  color: var(--ink2);
  line-height: 1.65;
}

/* ── ARCH PAGE ── */
.arch-page {
  padding: 48px 32px 80px;
  max-width: 1200px;
  margin: 0 auto;
}

.arch-page h2 {
  font-size: 26px;
  font-weight: 800;
  margin-bottom: 8px;
}

.arch-page .sub {
  color: var(--ink2);
  margin-bottom: 40px;
  font-size: 15px;
}

.arch-layout {
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: 24px;
  align-items: start;
}

/* clickable tag */
.arch-tag.clickable {
  cursor: pointer;
  transition: border-color 0.15s, box-shadow 0.15s, transform 0.1s, opacity 0.15s;
}
.arch-tag.clickable:hover {
  opacity: 1;
  transform: translateY(-1px);
  box-shadow: 0 0 0 1px currentColor;
}
.arch-tag.clickable.active {
  outline: 2px solid currentColor;
  outline-offset: 2px;
}

/* detail panel */
.arch-detail-panel {
  position: sticky;
  top: 72px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  min-height: 240px;
  overflow: hidden;
}

.arch-detail-empty {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 240px;
  padding: 24px;
}

.arch-detail-hint {
  text-align: center;
  color: var(--ink3);
  font-size: 13px;
  line-height: 1.8;
}

.arch-detail-hint span {
  display: inline-flex;
  align-items: center;
  height: 20px;
  padding: 0 6px;
  border-radius: 6px;
  background: var(--primary-soft);
  color: var(--primary);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
}

.arch-detail-hint span.risk {
  background: var(--red-soft);
  color: var(--red);
}

.arch-detail-hint span.workflow {
  background: var(--green-soft);
  color: var(--green);
}

.arch-detail-content {
  display: flex;
  flex-direction: column;
}

.arch-detail-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  border-bottom: 1px solid var(--line);
  background: var(--bg3);
}

.arch-detail-tag {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  color: var(--ink);
}

.arch-detail-close {
  width: 28px;
  height: 28px;
  padding: 0;
  border-radius: 6px;
  background: transparent;
  border: 1px solid var(--line2);
  color: var(--ink3);
  font-size: 12px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
}
.arch-detail-close:hover { color: var(--ink); border-color: var(--ink2); }

.arch-detail-body {
  padding: 16px;
  font-size: 13px;
  line-height: 1.65;
  color: var(--ink2);
  overflow-y: auto;
  max-height: calc(100vh - 200px);
}

.arch-detail-body h4 {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--ink3);
  margin: 14px 0 6px;
}
.arch-detail-body h4:first-child { margin-top: 0; }

.arch-detail-body p { color: var(--ink2); margin-bottom: 8px; }

.arch-detail-body code {
  display: block;
  padding: 10px 12px;
  border-radius: 8px;
  background: var(--bg);
  border: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--green);
  white-space: pre;
  overflow-x: auto;
  margin-bottom: 10px;
  line-height: 1.6;
}

.arch-detail-body ul {
  padding-left: 16px;
  margin-bottom: 10px;
}
.arch-detail-body li { margin-bottom: 4px; color: var(--ink2); }

.arch-detail-body .highlight {
  color: var(--primary);
  font-weight: 700;
}

.arch-detail-body .warn {
  color: var(--yellow);
  font-weight: 700;
}

/* warn-block: replay "待实现" 等警示段落 */
.arch-detail-body .warn-block {
  background: rgba(234, 179, 8, 0.08);
  border-left: 3px solid var(--yellow);
  border-radius: 0 6px 6px 0;
  padding: 8px 10px;
  color: var(--ink2);
}

/* syntax highlight tokens in code blocks */
.arch-detail-body code .c-cmt    { color: var(--ink3); }
.arch-detail-body code .c-str    { color: #e8b86d; }
.arch-detail-body code .c-kw     { color: var(--primary); font-weight: 600; }
.arch-detail-body code .c-arrow  { color: var(--green); font-weight: 700; }
.arch-detail-body code .c-num    { color: #a8d8a8; }

@media (max-width: 900px) {
  .arch-layout { grid-template-columns: 1fr; }
  .arch-detail-panel { position: static; }
}

.arch-flow {
  display: flex;
  flex-direction: column;
  gap: 0;
  position: relative;
}

.arch-row {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 24px;
  align-items: start;
  padding: 16px 0;
  border-left: 2px solid var(--line2);
  padding-left: 24px;
  position: relative;
}

.arch-row::before {
  content: '';
  position: absolute;
  left: -7px;
  top: 22px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--primary);
  border: 2px solid var(--bg);
}

.arch-label {
  font-size: 12px;
  font-weight: 700;
  color: var(--ink3);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding-top: 2px;
}

.arch-box {
  padding: 18px 22px;
  border-radius: 10px;
  background: var(--surface);
  border: 1px solid var(--line);
  font-size: 14px;
}

.arch-box strong {
  display: block;
  font-size: 15px;
  margin-bottom: 6px;
  color: var(--ink);
}

.arch-box p {
  color: var(--ink2);
  font-size: 14px;
  line-height: 1.65;
  margin-bottom: 4px;
}

.arch-box .tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 10px;
}

.arch-box .tags::before {
  content: "点击标签查看细节";
  flex-basis: 100%;
  color: var(--ink3);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.arch-tag {
  padding: 2px 8px;
  border-radius: 6px;
  font-size: 11px;
  font-weight: 700;
  background: var(--bg3);
  color: var(--ink2);
  font-family: var(--font-mono);
}

.arch-tag.clickable {
  background: var(--primary-soft);
  color: var(--primary);
}

.arch-tag.green { background: var(--green-soft); color: var(--green); }
.arch-tag.blue  { background: var(--primary-soft); color: var(--primary); }
.arch-tag.yellow{ background: var(--yellow-soft); color: var(--yellow); }
.arch-tag.red   { background: var(--red-soft); color: var(--red); }
.arch-tag.purple{ background: rgba(188,140,255,0.12); color: var(--purple); }

/* tooltip */
[data-tip] {
  position: relative;
  cursor: help;
  border-bottom: 1px dashed currentColor;
}

[data-tip]::after {
  content: attr(data-tip);
  position: absolute;
  bottom: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%);
  width: max-content;
  max-width: 320px;
  padding: 8px 12px;
  border-radius: 8px;
  background: #2d333b;
  border: 1px solid var(--line2);
  color: var(--ink);
  font-size: 12px;
  font-weight: 400;
  line-height: 1.55;
  font-family: var(--font-mono);
  white-space: pre-wrap;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.15s;
  z-index: 200;
  box-shadow: var(--shadow);
  text-transform: none;
  letter-spacing: 0;
}

[data-tip]:hover::after {
  opacity: 1;
}

/* ── DEMO PAGE ── */
.demo-page {
  display: grid;
  grid-template-columns: 260px 1fr 320px;
  gap: 16px;
  padding: 16px;
  height: calc(100vh - 56px);
  max-width: 1440px;
  margin: 0 auto;
}

/* case shelf */
.case-shelf {
  display: flex;
  flex-direction: column;
  gap: 8px;
  overflow-y: auto;
  padding-right: 4px;
}

.case-shelf-title {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink3);
  padding: 4px 0 8px;
}

.case-group-header {
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--ink3);
  padding: 12px 2px 5px;
  border-top: 1px solid var(--line);
  margin-top: 4px;
}
.case-group-header:first-child {
  border-top: none;
  margin-top: 0;
  padding-top: 2px;
}

.case-card {
  padding: 12px;
  border-radius: 10px;
  background: var(--surface);
  border: 1.5px solid var(--line);
  cursor: pointer;
  text-align: left;
  transition: border-color 0.15s, background 0.15s;
  width: 100%;
}

.case-card:hover { border-color: var(--primary); background: var(--primary-soft); }
.case-card.active { border-color: var(--primary); background: var(--primary-soft); }

.case-card-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 6px;
  margin-bottom: 4px;
}

.case-card-category {
  font-size: 10px;
  font-weight: 700;
  color: var(--ink3);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  display: block;
  margin-bottom: 2px;
}

.case-card-title {
  font-size: 13px;
  font-weight: 700;
  color: var(--ink);
  line-height: 1.3;
}

.case-card-badge {
  flex-shrink: 0;
  padding: 1px 7px;
  border-radius: 999px;
  font-size: 10px;
  font-weight: 700;
  background: var(--yellow-soft);
  color: var(--yellow);
}

.case-card-desc {
  font-size: 12px;
  color: var(--ink2);
  line-height: 1.5;
  margin-bottom: 8px;
}

.case-card-checks {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
}

.case-card-checks span {
  padding: 1px 7px;
  border-radius: 6px;
  background: var(--bg3);
  color: var(--ink2);
  font-size: 11px;
  font-weight: 600;
}

/* terminal */
.terminal-wrap {
  display: flex;
  flex-direction: column;
  background: var(--bg2);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  min-height: 0;
}

.terminal-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  background: var(--surface);
  border-bottom: 1px solid var(--line);
  flex-shrink: 0;
}

.terminal-dots {
  display: flex;
  gap: 6px;
}

.terminal-dots span {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}
.terminal-dots span:nth-child(1) { background: #ff5f57; }
.terminal-dots span:nth-child(2) { background: #febc2e; }
.terminal-dots span:nth-child(3) { background: #28c840; }

.terminal-title {
  font-size: 12px;
  color: var(--ink2);
  font-weight: 600;
  font-family: var(--font-mono);
  flex: 1;
  text-align: center;
}

.terminal-body {
  flex: 1;
  overflow-y: auto;
  padding: 20px 24px;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.65;
  min-height: 0;
}

.terminal-body::-webkit-scrollbar { width: 6px; }
.terminal-body::-webkit-scrollbar-track { background: transparent; }
.terminal-body::-webkit-scrollbar-thumb { background: var(--line2); border-radius: 3px; }

.term-line {
  display: flex;
  gap: 10px;
  margin-bottom: 2px;
  animation: fadein 0.2s ease;
}

@keyframes fadein {
  from { opacity: 0; transform: translateY(4px); }
  to   { opacity: 1; transform: translateY(0); }
}

.term-prefix { color: var(--ink3); flex-shrink: 0; min-width: 90px; }
.term-prefix.router  { color: var(--primary); }
.term-prefix.tool    { color: var(--green); }
.term-prefix.policy  { color: var(--yellow); }
.term-prefix.evidence{ color: var(--purple); }
.term-prefix.security{ color: var(--orange); }
.term-prefix.llm     { color: #79c0ff; }
.term-prefix.hitl    { color: var(--red); }
.term-prefix.report  { color: var(--green); }

.term-text { color: var(--ink); }
.term-detail { color: var(--ink2); margin-left: 100px; font-size: 12px; margin-top: -2px; margin-bottom: 6px; }

.sim-note {
  display: flex;
  align-items: center;
  gap: 7px;
  margin: 6px 0 10px;
  padding: 6px 11px;
  border-radius: 7px;
  background: rgba(234, 179, 8, 0.10);
  border: 1px solid rgba(234, 179, 8, 0.35);
  font-size: 12px;
  line-height: 1.4;
}
.sim-note-icon { font-size: 13px; flex-shrink: 0; }
.sim-note-label {
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: rgb(161, 120, 0);
  background: rgba(234, 179, 8, 0.18);
  padding: 1px 6px;
  border-radius: 4px;
  flex-shrink: 0;
}
.sim-note-text { color: var(--ink2); }

.term-status {
  display: inline-flex;
  align-items: center;
  height: 18px;
  padding: 0 7px;
  border-radius: 4px;
  font-size: 10px;
  font-weight: 700;
  margin-left: 8px;
  vertical-align: middle;
}
.term-status.ok      { background: var(--green-soft); color: var(--green); }
.term-status.warning { background: var(--yellow-soft); color: var(--yellow); }
.term-status.pending { background: var(--red-soft); color: var(--red); }

.term-cursor {
  display: inline-block;
  width: 8px;
  height: 14px;
  background: var(--primary);
  vertical-align: middle;
  margin-left: 4px;
  animation: blink 1s step-end infinite;
}
@keyframes blink { 0%,100%{opacity:1} 50%{opacity:0} }

/* 故障描述气泡 */
.term-user-msg {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-bottom: 16px;
  padding: 10px 14px;
  background: rgba(47,129,247,0.1);
  border: 1px solid rgba(47,129,247,0.25);
  border-radius: 8px;
  animation: fadein 0.2s ease;
}

.term-user-label {
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--primary);
}

.term-user-text {
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.55;
}

.terminal-footer {
  padding: 12px 16px;
  border-top: 1px solid var(--line);
  background: var(--surface);
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.run-btn {
  flex: 1;
  height: 36px;
  border-radius: 8px;
  background: var(--primary);
  color: #fff;
  font-size: 13px;
  font-weight: 700;
  border: none;
  cursor: pointer;
  transition: background 0.15s;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
}
.run-btn:hover:not(:disabled) { background: #388bfd; }
.run-btn:disabled { opacity: 0.5; cursor: not-allowed; }

.reset-btn {
  height: 36px;
  padding: 0 14px;
  border-radius: 8px;
  background: transparent;
  color: var(--ink2);
  font-size: 13px;
  font-weight: 600;
  border: 1.5px solid var(--line2);
  cursor: pointer;
  transition: all 0.15s;
}
.reset-btn:hover { border-color: var(--ink2); color: var(--ink); }

/* HITL box */
.hitl-box {
  margin: 8px 0 12px 100px;
  padding: 14px 16px;
  border-radius: 10px;
  background: rgba(248,81,73,0.08);
  border: 1px solid rgba(248,81,73,0.3);
  font-family: var(--font-mono);
  font-size: 12px;
  animation: fadein 0.25s ease;
}

.hitl-box-title {
  color: var(--red);
  font-weight: 700;
  font-size: 13px;
  margin-bottom: 8px;
}

.hitl-box-detail {
  color: var(--ink2);
  margin-bottom: 10px;
  line-height: 1.6;
}

.hitl-actions {
  display: flex;
  gap: 8px;
  margin-top: 10px;
}

.hitl-approve {
  height: 30px;
  padding: 0 14px;
  border-radius: 7px;
  background: var(--green-soft);
  border: 1px solid var(--green);
  color: var(--green);
  font-size: 12px;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.15s;
  font-family: var(--font-mono);
}
.hitl-approve:hover { background: var(--green); color: #0d1117; }

.hitl-reject {
  height: 30px;
  padding: 0 14px;
  border-radius: 7px;
  background: var(--red-soft);
  border: 1px solid var(--red);
  color: var(--red);
  font-size: 12px;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.15s;
  font-family: var(--font-mono);
}
.hitl-reject:hover { background: var(--red); color: #fff; }

/* inspector panel */
.inspector {
  display: flex;
  flex-direction: column;
  gap: 10px;
  overflow-y: auto;
  min-height: 0;
}

.panel {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: visible;   /* tooltip 需要溢出面板，改为 visible */
  flex-shrink: 0;
}

.panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 14px;
  border-bottom: 1px solid var(--line);
  border-radius: var(--radius) var(--radius) 0 0;  /* 补回顶部圆角 */
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--ink3);
}

.panel-badge {
  height: 20px;
  padding: 0 8px;
  border-radius: 999px;
  background: var(--bg3);
  color: var(--ink2);
  font-size: 10px;
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  font-family: var(--font-mono);
}

.panel-body {
  padding: 12px 14px;
  font-size: 12px;
}

.summary-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.metric-label {
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--ink3);
  margin-bottom: 2px;
}

/* Router ⓘ tooltip */
.metric-tip-wrap {
  position: relative;
}
.tip-icon {
  font-size: 10px;
  cursor: help;
  opacity: 0.6;
  margin-left: 3px;
  vertical-align: middle;
}
.metric-tip-box {
  display: none;
  position: absolute;
  top: calc(100% + 6px);
  left: 0;
  z-index: 100;
  background: var(--surface);
  border: 1px solid var(--line2);
  border-radius: 8px;
  padding: 10px 12px;
  width: 260px;
  box-shadow: 0 8px 24px rgba(0,0,0,0.3);
  font-size: 12px;
  line-height: 1.5;
  text-transform: none;
  letter-spacing: 0;
  font-weight: 400;
  color: var(--ink2);
}
.metric-tip-wrap:hover .metric-tip-box {
  display: block;
}
.tip-row {
  display: flex;
  align-items: baseline;
  gap: 8px;
  margin-bottom: 6px;
}
.tip-row:last-child { margin-bottom: 0; }
.tip-tag {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 700;
  padding: 1px 6px;
  border-radius: 4px;
  flex-shrink: 0;
}
.tip-tag.rule     { background: var(--green-soft);    color: var(--green); }
.tip-tag.llm      { background: var(--primary-soft);  color: var(--primary); }
.tip-tag.fallback { background: var(--yellow-soft);   color: var(--yellow); }

/* 右列 tooltip 向左展开，避免超出 inspector 右边界 */
.metric-tip-box.tip-box-right {
  left: auto;
  right: 0;
}

.metric-value {
  font-size: 13px;
  font-weight: 700;
  color: var(--ink);
  font-family: var(--font-mono);
  overflow-wrap: anywhere;
}

.tool-list {
  list-style: none;
  padding: 10px 14px;
}

.tool-item {
  display: grid;
  grid-template-columns: 22px 1fr auto;
  gap: 8px;
  align-items: start;
  padding: 7px 0;
  border-bottom: 1px solid var(--line);
  animation: fadein 0.2s ease;
}
.tool-item:last-child { border-bottom: none; }

/* A: Policy / Loop 步骤 — 灰色缩进，视觉上区分于工具调用 */
.tool-item.is-policy {
  opacity: 0.75;
  padding-left: 6px;
  border-left: 2px solid var(--yellow);
}
.tool-item.is-policy .tool-num {
  background: rgba(234,179,8,0.12);
  color: var(--yellow);
  font-size: 12px;
}
.tool-item.is-policy .tool-name {
  font-family: var(--font-sans);
  font-size: 12px;
  font-weight: 500;
  color: var(--ink2);
}

/* F: LLM 步骤 — 蓝色标记，区分于工具调用 */
.tool-item.is-llm {
  padding-left: 6px;
  border-left: 2px solid var(--primary);
}
.tool-item.is-llm .tool-num {
  background: var(--primary-soft);
  color: var(--primary);
  font-size: 11px;
}
.tool-item.is-llm .tool-name {
  font-family: var(--font-sans);
  font-size: 12px;
  font-weight: 600;
  color: var(--primary);
}

.tool-num {
  width: 22px;
  height: 22px;
  border-radius: 6px;
  background: var(--primary-soft);
  color: var(--primary);
  font-size: 10px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  flex-shrink: 0;
}

.tool-name {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  color: var(--ink);
  overflow-wrap: anywhere;
}

.tool-meta {
  font-size: 11px;
  color: var(--ink3);
  margin-top: 2px;
}

.pill {
  display: inline-flex;
  align-items: center;
  height: 20px;
  padding: 0 7px;
  border-radius: 999px;
  font-size: 10px;
  font-weight: 700;
  white-space: nowrap;
  font-family: var(--font-mono);
}
.pill.ok        { background: var(--green-soft); color: var(--green); }
.pill.warning   { background: var(--yellow-soft); color: var(--yellow); }
.pill.pending   { background: var(--red-soft); color: var(--red); }
.pill.error     { background: var(--red-soft); color: var(--red); }
.pill.llm       { background: rgba(121,192,255,0.12); color: #79c0ff; }

.evidence-list {
  list-style: none;
  padding: 10px 14px;
}

.evidence-item {
  padding: 7px 0;
  border-bottom: 1px solid var(--line);
  font-size: 12px;
  animation: fadein 0.2s ease;
}
.evidence-item:last-child { border-bottom: none; }

.evidence-source {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 700;
  color: var(--purple);
  margin-bottom: 2px;
}

.evidence-summary {
  color: var(--ink2);
  line-height: 1.5;
}

.muted { color: var(--ink3); font-size: 12px; padding: 10px 14px; }

/* report */
.report-bubble {
  padding: 16px 20px;
  background: var(--bg2);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  font-size: 13px;
  line-height: 1.7;
  animation: fadein 0.3s ease;
}

.report-bubble h3 {
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--primary);
  margin: 14px 0 6px;
}
.report-bubble h3:first-child { margin-top: 0; }

.report-bubble p { color: var(--ink); margin-bottom: 6px; }

.report-bubble ul {
  padding-left: 18px;
  color: var(--ink2);
  margin-bottom: 6px;
}
.report-bubble li { margin-bottom: 4px; }

.report-confidence {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 10px;
  padding: 4px 10px;
  border-radius: 6px;
  background: var(--bg3);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  color: var(--ink2);
}

.report-safety-note {
  margin-top: 10px;
  padding: 6px 12px;
  border-radius: 6px;
  background: var(--orange-soft);
  color: var(--orange);
  font-size: 12px;
  font-family: var(--font-mono);
}

/* ── EVAL PAGE ── */
.eval-page {
  padding: 48px 32px 80px;
  max-width: 1180px;
  margin: 0 auto;
}

.eval-page h2 {
  font-size: 26px;
  font-weight: 800;
  margin-bottom: 8px;
}

.eval-page .sub {
  max-width: 100%;
  color: var(--ink2);
  margin-bottom: 28px;
  font-size: 15px;
}

.eval-page .sub strong {
  color: var(--ink);
  font-weight: 800;
}

.eval-summary {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin-bottom: 18px;
}

.eval-summary-card {
  padding: 16px;
  border-radius: var(--radius);
  background: var(--surface);
  border: 1px solid var(--line);
}

.eval-summary-num {
  color: var(--primary);
  font-size: 26px;
  font-weight: 800;
  line-height: 1.1;
  font-variant-numeric: tabular-nums;
}

.eval-summary-label {
  margin-top: 6px;
  color: var(--ink3);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.eval-principle {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 18px;
  margin-bottom: 24px;
  border-radius: var(--radius);
  background: var(--bg2);
  border: 1px solid var(--line);
}

.eval-principle h3 {
  font-size: 15px;
  font-weight: 800;
  margin-bottom: 4px;
}

.eval-principle p {
  color: var(--ink2);
  font-size: 13px;
  line-height: 1.65;
}

.eval-principle code {
  flex-shrink: 0;
  padding: 8px 10px;
  border-radius: 8px;
  background: var(--bg);
  border: 1px solid var(--line);
  color: var(--green);
  font-family: var(--font-mono);
  font-size: 12px;
}

.eval-groups {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.eval-group {
  border-radius: var(--radius);
  background: var(--surface);
  border: 1px solid var(--line);
  overflow: hidden;
}

.eval-group.green { border-color: rgba(63,185,80,0.34); }
.eval-group.blue { border-color: rgba(47,129,247,0.34); }
.eval-group.yellow { border-color: rgba(210,153,34,0.34); }
.eval-group.purple { border-color: rgba(188,140,255,0.34); }
.eval-group.red { border-color: rgba(248,81,73,0.34); }

.eval-group-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 20px;
  border-bottom: 1px solid var(--line);
  background: var(--bg2);
}

.eval-group-head h3 {
  font-size: 18px;
  font-weight: 800;
  margin-bottom: 4px;
}

.eval-group-head p {
  color: var(--ink2);
  font-size: 13px;
  line-height: 1.65;
}

.eval-group-count {
  flex-shrink: 0;
  padding: 3px 9px;
  border-radius: 999px;
  background: var(--primary-soft);
  color: var(--primary);
  font-size: 11px;
  font-weight: 800;
  font-family: var(--font-mono);
}

.eval-case-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(290px, 1fr));
  gap: 12px;
  padding: 14px;
}

.eval-case {
  padding: 14px;
  border-radius: 10px;
  background: var(--bg2);
  border: 1px solid var(--line);
}

.eval-case-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 8px;
}

.eval-case-id {
  color: var(--ink3);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  margin-bottom: 2px;
}

.eval-case h4 {
  color: var(--ink);
  font-size: 15px;
  font-weight: 800;
}

.eval-pass {
  flex-shrink: 0;
  padding: 2px 8px;
  border-radius: 999px;
  background: var(--green-soft);
  color: var(--green);
  font-size: 11px;
  font-weight: 800;
  text-transform: uppercase;
}

.eval-input {
  min-height: 42px;
  color: var(--ink2);
  font-size: 13px;
  line-height: 1.6;
  margin-bottom: 10px;
}

.eval-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 10px;
}

.eval-meta span,
.eval-tool {
  display: inline-flex;
  align-items: center;
  min-height: 22px;
  padding: 2px 8px;
  border-radius: 6px;
  background: var(--primary-soft);
  color: var(--primary);
  font-size: 11px;
  font-weight: 700;
  font-family: var(--font-mono);
}

.eval-meta span {
  background: var(--bg3);
  color: var(--ink2);
  font-family: inherit;
}

.eval-meta strong {
  color: var(--ink);
  font-weight: 800;
}

.eval-tools {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
  margin-bottom: 10px;
}

.eval-tool.muted-tool {
  background: var(--bg3);
  color: var(--ink3);
}

.eval-assertions {
  display: grid;
  gap: 4px;
  padding-left: 18px;
}

.eval-assertions li {
  color: var(--ink2);
  font-size: 12px;
  line-height: 1.5;
}

/* ── EVOLUTION PAGE ── */
.evo-page {
  padding: 48px 32px 80px;
  max-width: 900px;
  margin: 0 auto;
}

.evo-page h2 {
  font-size: 26px;
  font-weight: 800;
  margin-bottom: 8px;
}

.evo-page .sub {
  color: var(--ink2);
  margin-bottom: 44px;
  font-size: 15px;
}

.evo-timeline {
  display: flex;
  flex-direction: column;
  gap: 0;
  border-left: 2px solid var(--line2);
  padding-left: 28px;
  position: relative;
}

.evo-item {
  position: relative;
  padding-bottom: 36px;
}

.evo-item::before {
  content: '';
  position: absolute;
  left: -35px;
  top: 4px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  border: 2px solid var(--bg);
}

.evo-item.v1::before { background: var(--ink3); }
.evo-item.v2::before { background: var(--yellow); }
.evo-item.v3::before { background: var(--primary); }
.evo-item.next::before { background: var(--green); box-shadow: 0 0 0 4px var(--green-soft); }

.evo-version {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 10px;
}

.evo-tag {
  padding: 2px 10px;
  border-radius: 6px;
  font-size: 12px;
  font-weight: 700;
  font-family: var(--font-mono);
}
.evo-item.v1 .evo-tag { background: var(--bg3); color: var(--ink2); }
.evo-item.v2 .evo-tag { background: var(--yellow-soft); color: var(--yellow); }
.evo-item.v3 .evo-tag { background: var(--primary-soft); color: var(--primary); }
.evo-item.next .evo-tag { background: var(--green-soft); color: var(--green); }

.evo-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--ink);
}

.evo-desc {
  color: var(--ink2);
  font-size: 14px;
  line-height: 1.65;
  margin-bottom: 12px;
}

.evo-points {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 12px;
}

.evo-points li {
  display: flex;
  gap: 8px;
  font-size: 13px;
  color: var(--ink2);
  line-height: 1.5;
}

.evo-points li::before {
  content: '→';
  color: var(--ink3);
  flex-shrink: 0;
}

.evo-why {
  padding: 10px 14px;
  border-radius: 8px;
  background: var(--bg3);
  font-size: 13px;
  color: var(--ink2);
  border-left: 3px solid var(--primary);
  font-style: italic;
}

/* ── RESPONSIVE ── */
@media (max-width: 1024px) {
  .demo-page {
    grid-template-columns: 200px 1fr;
    grid-template-rows: 1fr auto;
  }
  .inspector { display: none; }
  .eval-summary { grid-template-columns: repeat(2, 1fr); }
  .eval-principle { align-items: flex-start; flex-direction: column; }
}

.nav-hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  flex-shrink: 0;
}
.nav-hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--ink2);
  border-radius: 2px;
  transition: transform 0.2s, opacity 0.2s;
}
nav.open .nav-hamburger span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
nav.open .nav-hamburger span:nth-child(2) { opacity: 0; }
nav.open .nav-hamburger span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

@media (max-width: 720px) {
  nav { padding: 0 16px; position: relative; }
  .nav-hamburger { display: flex; }
  .nav-links {
    display: none;
    position: absolute;
    top: 56px;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    background: rgba(13,17,23,0.97);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--line);
    padding: 8px 16px 16px;
    gap: 2px;
  }
  nav.open .nav-links { display: flex; }
  .nav-links li { list-style: none; }
  .nav-links a { height: 44px; padding: 0 16px; font-size: 15px; }
  .hero { padding: 48px 20px 40px; }
  .features { padding: 0 20px 48px; }
  .demo-page { grid-template-columns: 1fr; padding: 12px; height: auto; }
  .case-shelf { max-height: 200px; overflow-x: auto; display: flex; flex-direction: row; }
  .case-card { min-width: 200px; }
  .arch-page, .evo-page, .eval-page { padding: 32px 20px 48px; }
  .arch-row { grid-template-columns: 1fr; }
  .hero-stats { gap: 24px; }
  .eval-summary { grid-template-columns: 1fr 1fr; }
  .eval-group-head { flex-direction: column; }
  .eval-principle code { width: 100%; white-space: normal; }
}