:root {
  --paper: #f6f1ea;
  --paper-deep: #eee5da;
  --ink: #2a211e;
  --muted: #776a63;
  --line: #d8cbc0;
  --rouge: #9c4f52;
  --rouge-dark: #6f3639;
  --rouge-soft: #ead5d3;
  --sage: #426558;
  --sage-soft: #dce8e1;
  --amber: #8a5a24;
  --danger: #9a3d35;
  --shadow: 0 18px 45px rgb(76 48 38 / 10%);
  --radius: 18px;
}

* { box-sizing: border-box; }

html { color-scheme: light; }

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  background:
    radial-gradient(circle at 8% 5%, rgb(156 79 82 / 9%), transparent 26rem),
    linear-gradient(135deg, var(--paper) 0%, #faf7f2 58%, var(--paper-deep) 100%);
  font-family: "Microsoft YaHei UI", "PingFang SC", sans-serif;
}

button, textarea { font: inherit; }
button { cursor: pointer; }

.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 20;
  transform: translateY(-140%);
  padding: 10px 14px;
  color: #fffaf4;
  background: var(--ink);
}
.skip-link:focus { transform: translateY(0); }

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1500px;
  margin: 0 auto;
  padding: 26px clamp(20px, 4vw, 64px) 18px;
}

.brand-block, .system-state, .route-line, .trace-title-row, .composer-actions {
  display: flex;
  align-items: center;
}

.brand-block { gap: 13px; }
.brand-mark {
  display: grid;
  width: 46px;
  height: 46px;
  place-items: center;
  border-radius: 50% 50% 44% 56%;
  color: #fff9f2;
  background: var(--rouge-dark);
  font-family: "STSong", "SimSun", serif;
  font-size: 23px;
}
.brand-block h1, .section-heading h2, .trace-header h2 {
  margin: 2px 0 0;
  font-family: "STSong", "SimSun", serif;
  font-weight: 600;
  letter-spacing: .02em;
}
.brand-block h1 { font-size: 22px; }
.eyebrow {
  margin: 0;
  color: var(--rouge-dark);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: .19em;
}

.system-state { gap: 9px; color: var(--muted); font-size: 13px; }
.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--amber);
  box-shadow: 0 0 0 4px rgb(138 90 36 / 12%);
}
.status-dot.online { background: var(--sage); box-shadow: 0 0 0 4px rgb(66 101 88 / 13%); }
.status-dot.offline { background: var(--danger); box-shadow: 0 0 0 4px rgb(154 61 53 / 12%); }

.quiet-button, .handoff-button, .scenario-button {
  border: 0;
  color: var(--muted);
  background: transparent;
}
.quiet-button {
  margin-left: 10px;
  padding: 8px 12px;
  border-bottom: 1px solid var(--line);
}
.quiet-button:disabled { cursor: wait; opacity: .5; }

.demo-disclaimer {
  display: flex;
  align-items: center;
  max-width: 1500px;
  margin: 0 auto 12px;
  padding: 10px clamp(20px, 4vw, 64px);
  gap: 10px;
  color: var(--rouge-dark);
  background: rgb(234 213 211 / 52%);
  font-size: 12px;
}
.demo-disclaimer strong {
  flex: 0 0 auto;
  padding: 3px 7px;
  border-radius: 5px;
  color: #fffaf4;
  background: var(--rouge-dark);
  font-size: 10px;
  letter-spacing: .06em;
}

.workspace {
  display: grid;
  grid-template-columns: minmax(0, 1.62fr) minmax(340px, .88fr);
  max-width: 1500px;
  min-height: calc(100vh - 104px);
  margin: 0 auto;
  padding: 0 clamp(20px, 4vw, 64px) 42px;
  gap: clamp(22px, 3vw, 46px);
}

.conversation-column {
  display: grid;
  grid-template-rows: auto auto minmax(300px, 1fr) auto;
  min-width: 0;
  min-height: 720px;
  overflow: hidden;
  border: 1px solid rgb(116 91 80 / 16%);
  border-radius: 24px;
  background: rgb(255 252 247 / 78%);
  box-shadow: var(--shadow);
}
.section-heading, .trace-header {
  display: flex;
  justify-content: space-between;
  align-items: end;
}
.section-heading { padding: 28px 30px 19px; }
.section-heading h2, .trace-header h2 { font-size: clamp(23px, 2.2vw, 31px); }
.conversation-id, .latency {
  color: var(--muted);
  font-size: 12px;
  font-variant-numeric: tabular-nums;
}

.demo-scenarios { min-width: 0; overflow: hidden; padding: 0 30px 18px; }
.demo-scenarios-heading {
  display: flex;
  min-width: 0;
  align-items: end;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: 11px;
}
.demo-scenarios h3 { margin: 4px 0 0; font-size: 14px; }
.demo-identity { min-width: 0; text-align: right; }
.demo-identity span { display: block; color: var(--muted); font-size: 10px; }
.demo-identity strong {
  display: block;
  max-width: 250px;
  margin-top: 3px;
  overflow: hidden;
  font-size: 11px;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.scenario-list {
  display: flex;
  min-width: 0;
  gap: 8px;
  padding: 2px 1px 8px;
  overflow-x: auto;
  scrollbar-color: var(--line) transparent;
}
.scenario-button {
  display: grid;
  flex: 0 0 auto;
  gap: 2px;
  min-width: 105px;
  padding: 8px 11px;
  border: 1px solid var(--line);
  border-radius: 11px;
  text-align: left;
  background: #fbf6ef;
}
.scenario-button span { color: var(--muted); font-size: 9px; }
.scenario-button strong { color: var(--ink); font-size: 12px; }
.scenario-button:hover, .scenario-button:focus-visible { border-color: var(--rouge); }
.scenario-button[aria-pressed="true"] {
  border-color: var(--rouge-dark);
  background: var(--rouge-soft);
  box-shadow: inset 0 0 0 1px rgb(111 54 57 / 8%);
}
.scenario-button[aria-pressed="true"] span,
.scenario-button[aria-pressed="true"] strong { color: var(--rouge-dark); }
.scenario-description {
  min-height: 17px;
  margin: 1px 0 0;
  color: var(--muted);
  font-size: 10px;
  line-height: 1.55;
}
.scenario-footer {
  display: flex;
  align-items: start;
  justify-content: space-between;
  gap: 12px;
}
.next-step-button {
  flex: 0 0 auto;
  padding: 5px 9px;
  border: 0;
  border-bottom: 1px solid var(--rouge);
  color: var(--rouge-dark);
  background: transparent;
  font-size: 10px;
}
.more-scenarios { margin-top: 7px; color: var(--muted); font-size: 10px; }
.more-scenarios summary { width: fit-content; cursor: pointer; }
.more-scenarios[open] summary { color: var(--rouge-dark); }
.secondary-scenarios { margin-top: 8px; }
.scenario-loading { color: var(--muted); font-size: 11px; }
.scenario-loading.error { color: var(--danger); }

.messages {
  overflow-y: auto;
  padding: 24px 30px 32px;
  border-top: 1px solid rgb(116 91 80 / 12%);
  scrollbar-color: var(--line) transparent;
}
.welcome-note {
  max-width: 560px;
  margin: 20px auto 0;
  padding: 22px 24px;
  color: var(--muted);
  text-align: center;
  background: var(--paper);
}
.welcome-note p { margin: 0 0 7px; color: var(--ink); }
.welcome-note small { line-height: 1.65; }
.message-row { display: flex; margin: 0 0 20px; }
.message-row.user { justify-content: flex-end; }
.message-bubble {
  max-width: min(78%, 680px);
  padding: 13px 16px;
  border-radius: 16px 16px 16px 5px;
  line-height: 1.72;
  white-space: pre-wrap;
}
.message-row.agent .message-bubble { background: var(--paper-deep); }
.message-row.user .message-bubble {
  color: #fffaf4;
  border-radius: 16px 16px 5px 16px;
  background: var(--rouge-dark);
}
.message-meta { margin-top: 5px; color: var(--muted); font-size: 10px; }
.message-row.user .message-meta { color: rgb(255 250 244 / 68%); }
.citation-marker {
  margin-left: 2px;
  color: var(--rouge-dark);
  font-size: .68em;
  font-weight: 800;
  line-height: 0;
  vertical-align: super;
}
.error-message-row .message-bubble {
  border: 1px solid rgb(154 61 53 / 24%);
  background: #f4e5df;
}
.message-recovery-actions { display: flex; gap: 8px; margin-top: 11px; }
.message-recovery-actions button {
  padding: 6px 10px;
  border: 1px solid rgb(154 61 53 / 28%);
  border-radius: 8px;
  color: var(--danger);
  background: transparent;
  font-size: 11px;
}
.message-recovery-actions button:last-child { color: #fffaf4; background: var(--danger); }
.message-recovery-actions button:disabled {
  cursor: wait;
  opacity: .55;
}
.typing { display: inline-flex; gap: 5px; }
.typing i { width: 5px; height: 5px; border-radius: 50%; background: var(--muted); animation: pulse 1s infinite; }
.typing i:nth-child(2) { animation-delay: .14s; }
.typing i:nth-child(3) { animation-delay: .28s; }
@keyframes pulse { 0%, 70%, 100% { opacity: .25; transform: translateY(0); } 35% { opacity: 1; transform: translateY(-3px); } }

.composer {
  margin: 0 18px 18px;
  padding: 13px 14px 12px;
  border: 1px solid var(--line);
  border-radius: 17px;
  background: #fffaf4;
}
.composer:focus-within { border-color: var(--rouge); box-shadow: 0 0 0 3px rgb(156 79 82 / 9%); }
.composer textarea {
  width: 100%;
  min-height: 76px;
  resize: none;
  border: 0;
  outline: 0;
  color: var(--ink);
  background: transparent;
  line-height: 1.6;
}
.composer-actions { justify-content: flex-end; gap: 10px; }
.input-hint { margin-right: auto; color: var(--muted); font-size: 11px; }
.handoff-button { padding: 9px 12px; }
.primary-button, .confirm-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  min-height: 42px;
  border: 0;
  border-radius: 12px;
  color: #fffaf4;
  background: var(--rouge-dark);
}
.primary-button { padding: 0 18px; }
.primary-button:disabled { cursor: wait; opacity: .55; }

.trace-column { padding: 8px 0 0; }
.trace-header { padding-bottom: 22px; border-bottom: 1px solid var(--line); }
.trace-section { padding: 24px 0; border-bottom: 1px solid var(--line); }
.trace-section h3 { margin: 0; font-size: 13px; font-weight: 700; }
.route-section { padding-top: 28px; }
.route-line { gap: 10px; margin: 13px 0 10px; }
.route-line strong { font-size: 15px; }
.route-line > span:last-child { margin-left: auto; color: var(--muted); font-size: 12px; }
.route-badge {
  padding: 5px 8px;
  border-radius: 6px;
  color: var(--rouge-dark);
  background: var(--rouge-soft);
  font-size: 11px;
  font-weight: 700;
}
.route-section p { margin: 0; color: var(--muted); font-size: 13px; line-height: 1.65; }
.stage-list {
  display: grid;
  margin: 15px 0 0;
  padding: 0;
  gap: 9px;
  list-style: none;
}
.stage-list li {
  display: grid;
  grid-template-columns: 10px 1fr auto;
  align-items: center;
  gap: 9px;
  color: var(--muted);
  font-size: 11px;
}
.stage-list li::after { content: "等待"; color: var(--muted); font-size: 9px; }
.stage-list i { width: 7px; height: 7px; border-radius: 50%; background: var(--line); }
.stage-list li.active { color: var(--ink); font-weight: 700; }
.stage-list li.active i { background: var(--amber); box-shadow: 0 0 0 4px rgb(138 90 36 / 12%); animation: pulse 1.2s infinite; }
.stage-list li.active::after { content: "进行中"; color: var(--amber); }
.stage-list li.done i { background: var(--sage); }
.stage-list li.done::after { content: "完成"; color: var(--sage); }
.stage-list li.skipped::after { content: "跳过"; }
.stage-list li.blocked i, .stage-list li.error i { background: var(--danger); }
.stage-list li.blocked::after { content: "已拦截"; color: var(--danger); }
.stage-list li.error::after { content: "失败"; color: var(--danger); }
.trace-title-row { justify-content: space-between; }
.trace-title-row > span { color: var(--muted); font-size: 12px; }
.source-list { margin: 13px 0 0; padding: 0; list-style: none; }
.source-list li { padding: 12px 0; border-top: 1px dashed rgb(116 91 80 / 22%); }
.source-list li:first-child { border-top: 0; }
.source-list a { color: var(--ink); font-size: 13px; font-weight: 700; text-decoration-color: var(--rouge); text-underline-offset: 3px; }
.source-list p { margin: 5px 0 0; color: var(--muted); font-size: 11px; line-height: 1.45; }
.source-list .empty-row { color: var(--muted); font-size: 12px; }
.detail-list { margin: 15px 0 0; }
.detail-list div { display: grid; grid-template-columns: 92px 1fr; gap: 12px; padding: 8px 0; }
.detail-list dt { color: var(--muted); font-size: 12px; }
.detail-list dd { margin: 0; overflow-wrap: anywhere; font-size: 12px; }
.confirmation-card {
  margin-top: 16px;
  padding: 15px;
  border: 1px solid rgb(66 101 88 / 25%);
  border-radius: 15px;
  background: var(--sage-soft);
}
.confirmation-heading { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; }
.confirmation-heading span { color: var(--sage); font-size: 9px; font-weight: 700; letter-spacing: .12em; }
.confirmation-heading strong { font-size: 13px; }
.confirmation-summary { margin: 12px 0 0; }
.confirmation-summary div { display: grid; grid-template-columns: 58px 1fr; gap: 8px; padding: 5px 0; }
.confirmation-summary dt { color: var(--sage); font-size: 10px; }
.confirmation-summary dd { margin: 0; overflow-wrap: anywhere; font-size: 11px; }
.confirmation-card > p { margin: 10px 0 0; color: var(--sage); font-size: 9px; line-height: 1.55; }
.confirmation-actions { display: grid; grid-template-columns: .8fr 1.2fr; gap: 8px; margin-top: 13px; }
.confirm-button, .cancel-confirmation-button { min-height: 38px; padding: 0 12px; border-radius: 10px; }
.confirm-button { width: 100%; background: var(--sage); }
.cancel-confirmation-button { border: 1px solid rgb(66 101 88 / 28%); color: var(--sage); background: transparent; }
.confirm-button:disabled { cursor: wait; opacity: .55; }
.hidden { display: none !important; }
.raw-details { padding: 20px 0; color: var(--muted); font-size: 12px; }
.raw-details summary { cursor: pointer; }
.raw-details pre {
  max-height: 300px;
  overflow: auto;
  padding: 14px;
  color: var(--ink);
  background: rgb(255 252 247 / 70%);
  white-space: pre-wrap;
  word-break: break-word;
  font: 11px/1.55 "Cascadia Code", monospace;
}

.toast {
  position: fixed;
  right: 28px;
  bottom: 28px;
  z-index: 10;
  max-width: 360px;
  padding: 13px 16px;
  transform: translateY(24px);
  opacity: 0;
  pointer-events: none;
  color: #fffaf4;
  background: var(--ink);
  transition: opacity .2s ease, transform .2s ease;
}
.toast.show { transform: translateY(0); opacity: 1; }

button:focus-visible, textarea:focus-visible, summary:focus-visible, a:focus-visible {
  outline: 3px solid rgb(156 79 82 / 28%);
  outline-offset: 3px;
}

@media (max-width: 960px) {
  .workspace { grid-template-columns: 1fr; }
  .conversation-column { min-height: 700px; }
  .trace-column { padding: 18px 4px 0; }
}

@media (max-width: 620px) {
  .topbar { align-items: flex-start; }
  .system-state { flex-wrap: wrap; justify-content: flex-end; max-width: 210px; }
  .quiet-button { margin-left: 4px; padding-inline: 8px; }
  .demo-disclaimer { align-items: flex-start; padding-inline: 14px; line-height: 1.5; }
  .workspace { padding-inline: 12px; }
  .conversation-column { min-height: calc(100vh - 120px); border-radius: 18px; }
  .section-heading, .messages { padding-inline: 18px; }
  .demo-scenarios { padding-inline: 18px; }
  .demo-scenarios-heading { align-items: flex-start; }
  .demo-identity { max-width: 150px; }
  .scenario-footer { display: block; }
  .next-step-button { margin-top: 5px; }
  .message-bubble { max-width: 90%; }
  .input-hint { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; transition-duration: .01ms !important; }
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}