:root {
  --bg: #f3f6fa;
  --surface: #ffffff;
  --surface-soft: #f7f9fc;
  --line: #dbe5ef;
  --text: #1f2c39;
  --muted: #687b8d;
  --brand: #1e63ad;
  --brand-soft: #edf4fb;
  --success: #1f7a57;
  --warn: #b36b1b;
  --danger: #b24a3b;
  --shadow: 0 10px 24px rgba(26, 45, 67, 0.06);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: linear-gradient(180deg, #f1f5f9 0%, #f7fafc 100%);
  color: var(--text);
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

button,
textarea,
input,
select {
  font: inherit;
}

input {
  width: 100%;
  min-height: 46px;
  padding: 0 14px;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--text);
}

h1,
h2,
h3,
p {
  margin: 0;
}

.page {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
  padding: 24px 0 40px;
  display: grid;
  gap: 16px;
}

.hero,
.ask-card,
.progress-card,
.history-card,
.result-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 18px;
  box-shadow: var(--shadow);
  padding: 20px;
}

.brandline,
.eyebrow {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--brand);
}

.app-brand {
  display: inline-flex;
  gap: 10px;
  align-items: center;
}

.app-brand img {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  object-fit: cover;
}

.hero h1 {
  margin-top: 8px;
  font-size: 34px;
  line-height: 1.2;
}

.hero-topline {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: flex-start;
  flex-wrap: wrap;
}

.subtitle {
  margin-top: 10px;
  color: var(--muted);
  line-height: 1.8;
  max-width: 900px;
}

.ask-card,
.answer-section,
.config-view,
.processing-view,
.result-view,
.history-list,
.result-grid,
.simple-list,
.source-list,
.timeline,
.suggestion-row,
.followup-area {
  display: grid;
  gap: 14px;
}

textarea {
  width: 100%;
  min-height: 118px;
  resize: vertical;
  padding: 16px;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--text);
  line-height: 1.7;
}

textarea:focus,
input:focus,
input[type="file"]:focus {
  outline: 0;
  border-color: #9ebcdc;
  box-shadow: 0 0 0 3px rgba(30, 99, 173, 0.08);
}

.ask-toolbar,
.section-head {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: flex-start;
  flex-wrap: wrap;
}

.section-head h2 {
  margin-top: 8px;
  font-size: 22px;
}

.suggestion-row {
  grid-auto-flow: column;
  grid-auto-columns: max-content;
}

.suggestion-button,
.submit-button,
.status-pill {
  min-height: 38px;
  padding: 0 14px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--brand-soft);
  color: var(--brand);
}

.suggestion-button,
.submit-button {
  cursor: pointer;
}

.suggestion-button[disabled],
.submit-button[disabled] {
  opacity: 0.7;
  cursor: wait;
}

.step-retry-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 10px;
}

.retry-timeout-select {
  min-height: 38px;
  width: auto;
  border-radius: 999px;
  font-size: 13px;
}

.submit-button {
  background: var(--brand);
  color: #fff;
  border-color: var(--brand);
}

.upload-box {
  display: grid;
  gap: 12px;
  padding: 16px;
  border-radius: 14px;
  border: 1px dashed #b8cbdf;
  background: #fbfdff;
}

.upload-box input[type="file"] {
  width: 100%;
}

.select-wrap {
  display: grid;
  gap: 10px;
}

.advanced-config {
  padding: 14px;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: var(--surface-soft);
}

.kb-config-form {
  display: grid;
  gap: 14px;
}

.advanced-config summary {
  cursor: pointer;
  color: var(--brand);
  font-weight: 700;
}

.advanced-config .result-grid {
  margin-top: 14px;
}

.field-label {
  font-size: 13px;
  color: var(--muted);
  font-weight: 700;
}

.select-wrap select {
  width: 100%;
  min-height: 46px;
  padding: 0 14px;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--text);
}

.upload-meta {
  display: grid;
  gap: 4px;
}

.upload-meta span,
.hint-row,
.timeline-body span,
.result-card p,
.simple-item p,
.source-item p,
.empty-box,
.error-box,
.soft-tip {
  color: var(--muted);
  line-height: 1.8;
}

.timeline-item {
  display: grid;
  grid-template-columns: 14px 1fr;
  gap: 12px;
  align-items: start;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}

.horizontal-progress {
  display: grid;
  gap: 12px;
  padding: 14px;
  border-radius: 14px;
  border: 1px solid #c7d8ea;
  background: #f4f8fc;
}

.progress-meter {
  height: 8px;
  overflow: hidden;
  border-radius: 999px;
  background: #dbe7f3;
}

.progress-meter-fill {
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--brand), #1f7a57);
  transition: width 240ms ease;
}

.progress-steps {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 8px;
}

.progress-step {
  min-width: 0;
  display: grid;
  gap: 3px;
  padding: 8px 10px;
  border-radius: 12px;
  background: #fff;
  border: 1px solid var(--line);
}

.progress-step span {
  color: var(--muted);
  font-size: 12px;
}

.progress-step strong {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: 13px;
}

.progress-step.running {
  border-color: #9ebcdc;
  background: #eef5fb;
}

.progress-step.completed {
  border-color: #cfe1d8;
  background: #f1f8f4;
}

.progress-step.error {
  border-color: #ecd7bb;
  background: #fdf7ee;
}

.timeline-item:last-child {
  border-bottom: 0;
}

.timeline-dot {
  width: 12px;
  height: 12px;
  border-radius: 999px;
  margin-top: 4px;
  background: #cedae6;
}

.timeline-dot.running {
  background: var(--brand);
}

.timeline-dot.completed {
  background: var(--success);
}

.timeline-dot.error {
  background: var(--warn);
}

.timeline-body strong,
.simple-item strong,
.source-item strong {
  display: block;
  margin-bottom: 4px;
}

.step-details {
  margin-top: 10px;
  padding: 10px 12px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: #fbfdff;
}

.step-details summary {
  cursor: pointer;
  color: var(--brand);
  font-weight: 700;
  font-size: 13px;
}

.step-detail-list {
  display: grid;
  gap: 10px;
  margin-top: 10px;
}

.step-detail-item {
  display: grid;
  gap: 4px;
}

.step-detail-item span {
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
}

.step-detail-item pre {
  max-height: 180px;
  overflow: auto;
  margin: 0;
  padding: 10px;
  border-radius: 10px;
  background: #f3f6fa;
  color: var(--text);
  white-space: pre-wrap;
  word-break: break-word;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 12px;
  line-height: 1.7;
}

.trace-box {
  display: grid;
  gap: 8px;
  padding: 14px;
  border-radius: 14px;
  border: 1px solid #c7d8ea;
  background: #f4f8fc;
}

.trace-item {
  display: grid;
  grid-template-columns: 110px 1fr;
  gap: 10px;
  align-items: center;
}

.trace-item span {
  color: var(--muted);
  font-size: 13px;
}

.trace-item code {
  overflow-wrap: anywhere;
  color: var(--text);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 12px;
}

.history-actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.utility-bar {
  display: grid;
  gap: 10px;
}

.utility-bar-actions {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  flex-wrap: wrap;
}

.utility-panel {
  display: grid;
  gap: 10px;
}

.overlay-shell {
  position: fixed;
  inset: 0;
  display: none;
  z-index: 40;
}

.overlay-shell.open {
  display: block;
}

.overlay-backdrop {
  position: absolute;
  inset: 0;
  border: 0;
  background: rgba(17, 31, 46, 0.34);
  cursor: pointer;
}

.overlay-panel {
  position: relative;
  z-index: 1;
  width: min(760px, calc(100vw - 32px));
  max-height: calc(100vh - 48px);
  overflow: auto;
  margin: 24px auto;
  padding: 18px;
  border-radius: 18px;
  border: 1px solid var(--line);
  background: var(--surface);
  box-shadow: 0 24px 48px rgba(18, 34, 51, 0.2);
}

.settings-panel {
  width: min(820px, calc(100vw - 32px));
}

.history-strip {
  display: grid;
  gap: 10px;
}

.history-strip-head {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: center;
  padding: 0 0 12px;
  border-radius: 14px;
  border-bottom: 1px solid var(--line);
}

.history-strip-meta {
  display: flex;
  gap: 10px;
  align-items: center;
}

.history-strip-meta span {
  color: var(--muted);
  font-size: 13px;
}

.history-drawer {
  padding: 4px 0 0;
}

.history-list {
  margin-top: 0;
}

.history-item-button {
  width: 100%;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto auto;
  gap: 12px;
  align-items: center;
  padding: 14px;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: var(--surface-soft);
  color: var(--text);
  text-align: left;
  cursor: pointer;
}

.history-item-button.active {
  border-color: #9ebcdc;
  background: #eef5fb;
}

.history-item-button strong,
.history-item-button code,
.history-item-button small,
.history-item-button em {
  display: block;
}

.history-item-button strong {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.history-item-button code {
  margin-top: 4px;
  overflow-wrap: anywhere;
  color: var(--muted);
  font-size: 12px;
}

.history-item-button em {
  min-width: 58px;
  font-style: normal;
  color: var(--brand);
  font-weight: 700;
}

.history-item-button small {
  color: var(--muted);
  white-space: nowrap;
}

.item-title {
  color: var(--text);
  font-weight: 600;
}

.decision-row {
  margin-top: 12px;
}

.result-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.processing-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.28fr);
  gap: 16px;
  align-items: start;
}

.processing-main,
.processing-side,
.result-summary-card {
  display: grid;
  gap: 14px;
}

.processing-side .timeline {
  padding: 14px;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: var(--surface-soft);
}

.result-summary-top {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: flex-start;
  flex-wrap: wrap;
}

.result-summary-top strong {
  font-size: 24px;
  line-height: 1.5;
}

.summary-metrics {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
}

.summary-metric {
  padding: 12px 14px;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: var(--surface-soft);
}

.summary-metric span {
  display: block;
  color: var(--muted);
  font-size: 12px;
  margin-bottom: 4px;
}

.summary-metric strong {
  font-size: 22px;
}

.result-shell,
.stage-card {
  gap: 18px;
}

.launch-card {
  width: 100%;
  margin: 0;
}

.cache-pill {
  display: inline-flex;
  width: fit-content;
  margin: 10px 0 2px;
  padding: 4px 10px;
  border-radius: 999px;
  border: 1px solid #cfe1d8;
  background: #f1f8f4;
  color: var(--success);
  font-size: 12px;
  font-weight: 700;
}

.decision-pill {
  display: inline-flex;
  min-height: 34px;
  align-items: center;
  padding: 0 12px;
  border-radius: 999px;
  background: #eef5fb;
  border: 1px solid #c7d8ea;
  color: var(--brand);
  font-weight: 600;
}

.item-topline {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  align-items: center;
}

.severity {
  padding: 2px 10px;
  border-radius: 999px;
  font-size: 12px;
  border: 1px solid var(--line);
  color: var(--muted);
  background: #fff;
}

.severity-高 {
  color: var(--danger);
  border-color: #e7c4be;
  background: #fbf2f1;
}

.severity-中 {
  color: var(--warn);
  border-color: #ecd7bb;
  background: #fdf7ee;
}

.hero-answer strong {
  font-size: 22px;
  line-height: 1.5;
}

.result-grid {
  grid-template-columns: 1fr 1fr;
}

.result-report {
  display: grid;
  grid-template-columns: 240px minmax(0, 1fr);
  gap: 18px;
  align-items: start;
}

.result-nav {
  position: sticky;
  top: 18px;
  display: grid;
  gap: 12px;
  padding: 16px;
  border-radius: 16px;
  border: 1px solid var(--line);
  background: var(--surface-soft);
}

.result-nav-list {
  display: grid;
  gap: 8px;
}

.result-nav-button {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  width: 100%;
  min-height: 42px;
  padding: 0 14px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--text);
  cursor: pointer;
  font-weight: 700;
  text-align: left;
}

.result-nav-button:hover {
  border-color: #a8c3de;
  background: #f7fbff;
}

.tab-count {
  display: inline-flex;
  min-width: 20px;
  justify-content: center;
  margin-left: 6px;
  padding: 0 6px;
  border-radius: 999px;
  border: 1px solid #c7d8ea;
  background: #eef5fb;
  color: var(--brand);
  font-size: 12px;
  line-height: 20px;
  font-weight: 700;
}

.result-report-content {
  display: grid;
  gap: 18px;
  min-width: 0;
}

.result-report-section {
  scroll-margin-top: 18px;
  display: grid;
  gap: 12px;
}

.result-report-head {
  align-items: center;
}

.result-report-head h3 {
  margin: 0;
  font-size: 22px;
}

.result-section-count {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 34px;
  padding: 0 12px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--muted);
  font-weight: 700;
}

.result-section-body {
  display: grid;
  gap: 12px;
}

.simple-item,
.source-item,
.empty-box {
  padding: 14px;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: var(--surface-soft);
}

.context-card {
  display: grid;
  gap: 6px;
  padding: 14px;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: var(--surface-soft);
}

.source-item.warn strong {
  color: var(--warn);
}

.result-inline {
  padding: 16px;
  background: var(--surface-soft);
  border: 1px solid var(--line);
}

.compact {
  padding-top: 18px;
}

.error-box {
  padding: 12px 14px;
  border-radius: 12px;
  border: 1px solid #e4c7c3;
  background: #fbf4f2;
  color: var(--danger);
}

@media (max-width: 900px) {
  .result-grid,
  .suggestion-row {
    grid-template-columns: 1fr;
  }

  .suggestion-row {
    grid-auto-flow: row;
  }
}

@media (max-width: 720px) {
  .page {
    width: min(100% - 20px, 100%);
    padding: 16px 0 28px;
  }

  .hero h1 {
    font-size: 28px;
  }

  .section-head h2 {
    font-size: 20px;
  }

  .hero,
  .ask-card,
  .progress-card,
  .history-card,
  .result-card {
    border-radius: 14px;
    padding: 16px;
  }

  .hero h1 {
    font-size: 24px;
  }

  .ask-toolbar {
    display: grid;
  }

  .submit-button,
  .suggestion-button,
  .status-pill,
  .retry-timeout-select {
    width: 100%;
    justify-content: center;
  }

  .history-actions {
    width: 100%;
    display: grid;
    grid-template-columns: 1fr 1fr;
  }

  .hero-topline,
  .result-actions {
    display: grid;
  }

  .processing-layout,
  .summary-metrics {
    grid-template-columns: 1fr;
  }

  .history-item-button {
    grid-template-columns: 1fr;
    gap: 6px;
  }

  .history-item-button strong {
    white-space: normal;
  }

  .step-retry-row {
    display: grid;
  }

  .timeline-item {
    grid-template-columns: 10px 1fr;
    gap: 10px;
  }

  .progress-steps {
    grid-template-columns: 1fr;
  }

  .progress-step {
    grid-template-columns: 72px 1fr;
    align-items: center;
  }

  .trace-item {
    grid-template-columns: 1fr;
    gap: 4px;
  }

  .hero-answer strong {
    font-size: 18px;
  }

  .item-topline {
    align-items: flex-start;
    flex-direction: column;
  }

  .tab-scroll {
    margin: 0 -16px;
    padding: 0 16px 4px;
  }

  textarea {
    min-height: 96px;
  }
}

@media (max-width: 420px) {
  .page {
    width: min(100% - 12px, 100%);
    padding-top: 10px;
  }

  .hero,
  .ask-card,
  .progress-card,
  .history-card,
  .result-card {
    padding: 14px;
  }

  .hero h1 {
    font-size: 22px;
  }

  .section-head h2 {
    font-size: 18px;
  }

  .result-report {
    grid-template-columns: 1fr;
  }

  .utility-bar-actions {
    justify-content: stretch;
  }

  .utility-bar-actions .suggestion-button {
    flex: 1 1 0;
  }

  .overlay-panel,
  .settings-panel {
    width: calc(100vw - 20px);
    margin: 10px auto;
    max-height: calc(100vh - 20px);
    padding: 14px;
  }

  .result-nav {
    position: static;
    padding: 12px;
  }

  .result-nav-list {
    display: flex;
    gap: 8px;
    overflow-x: auto;
    padding-bottom: 2px;
    scrollbar-width: thin;
  }

  .result-nav-button {
    flex: 0 0 auto;
    min-height: 38px;
    padding: 0 14px;
  }
}