:root {
  --ink: #0f172a;
  --ink-soft: #334155;
  --muted: #64748b;
  --muted-light: #94a3b8;
  --line: #e2e8f0;
  --line-strong: #cbd5e1;
  --surface: #ffffff;
  --surface-soft: #f8fafc;
  --canvas: #f4f7fb;
  --blue: #2563eb;
  --blue-dark: #1d4ed8;
  --blue-soft: #eff6ff;
  --gold: #d97706;
  --gold-soft: #fffbeb;
  --olive: #6b7c2e;
  --olive-soft: #f7fee7;
  --pink: #db5a79;
  --pink-soft: #fff1f2;
  --purple: #7c3aed;
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.05);
  --shadow-md: 0 12px 30px rgba(15, 23, 42, 0.06);
  --radius-sm: 8px;
  --radius: 12px;
  --radius-lg: 16px;
  --sidebar-width: 292px;
  color: var(--ink);
  font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans CJK SC", Arial, sans-serif;
  font-synthesis: none;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 22px;
}

body {
  margin: 0;
  min-width: 320px;
  background: var(--canvas);
  color: var(--ink);
  -webkit-font-smoothing: antialiased;
}

button,
input,
select {
  font: inherit;
}

button,
select {
  cursor: pointer;
}

a {
  color: inherit;
}

.skip-link {
  position: fixed;
  z-index: 1000;
  top: 10px;
  left: 10px;
  padding: 9px 13px;
  border-radius: var(--radius-sm);
  background: var(--ink);
  color: #fff;
  text-decoration: none;
  transform: translateY(-160%);
  transition: transform 0.15s ease;
}

.skip-link:focus {
  transform: translateY(0);
}

:focus-visible {
  outline: 3px solid rgba(37, 99, 235, 0.28);
  outline-offset: 2px;
}

.site-header {
  border-bottom: 1px solid var(--line);
  background: var(--surface);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  width: min(100%, 1680px);
  margin: 0 auto;
  padding: 22px 34px;
}

.eyebrow,
.section-kicker {
  margin: 0 0 6px;
  color: var(--blue);
  font-size: 0.72rem;
  font-weight: 750;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.site-header h1 {
  margin: 0;
  color: var(--ink);
  font-size: clamp(1.55rem, 2.4vw, 2.1rem);
  line-height: 1.22;
  letter-spacing: -0.035em;
}

.header-subtitle {
  margin: 7px 0 0;
  color: var(--muted);
  font-size: 0.91rem;
}

.snapshot-badge {
  display: inline-flex;
  align-items: center;
  flex: 0 0 auto;
  gap: 9px;
  min-height: 38px;
  padding: 8px 13px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface-soft);
  color: var(--ink-soft);
  font-size: 0.82rem;
  font-weight: 650;
  white-space: nowrap;
}

.snapshot-badge__dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--olive);
  box-shadow: 0 0 0 4px rgba(107, 124, 46, 0.12);
}

.app-shell {
  display: grid;
  grid-template-columns: var(--sidebar-width) minmax(0, 1fr);
  width: min(100%, 1680px);
  min-height: calc(100vh - 104px);
  margin: 0 auto;
}

.filter-panel {
  align-self: start;
  position: sticky;
  top: 0;
  max-height: 100vh;
  overflow: auto;
  padding: 26px 24px 36px;
  border-right: 1px solid var(--line);
  background: var(--surface);
  scrollbar-width: thin;
}

.filter-panel__heading {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 18px;
}

.filter-panel h2 {
  margin: 0;
  font-size: 1.1rem;
  letter-spacing: -0.015em;
}

.button {
  min-height: 34px;
  padding: 7px 11px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm);
  background: var(--surface);
  color: var(--ink-soft);
  font-weight: 650;
}

.button:hover {
  border-color: var(--blue);
  color: var(--blue-dark);
}

.button--quiet {
  font-size: 0.8rem;
}

#dashboardFilters {
  display: grid;
  gap: 13px;
}

.field {
  display: grid;
  gap: 6px;
}

.field label {
  color: var(--ink-soft);
  font-size: 0.78rem;
  font-weight: 700;
}

.field input,
.field select {
  width: 100%;
  min-height: 39px;
  padding: 8px 10px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm);
  background: var(--surface);
  color: var(--ink);
  font-size: 0.86rem;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.field input::placeholder {
  color: var(--muted-light);
}

.field input:hover,
.field select:hover,
.field input:focus,
.field select:focus {
  border-color: var(--blue);
}

.field input:focus,
.field select:focus {
  outline: none;
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
}

.filter-summary {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
  margin-top: 18px;
  padding: 12px 13px;
  border: 1px solid #bfdbfe;
  border-radius: var(--radius);
  background: var(--blue-soft);
  color: var(--ink-soft);
  font-size: 0.8rem;
}

.filter-summary strong {
  color: var(--blue-dark);
  font-size: 1rem;
  font-variant-numeric: tabular-nums;
}

.filter-help {
  margin: 10px 2px 18px;
  color: var(--muted);
  font-size: 0.72rem;
  line-height: 1.65;
}

.section-nav {
  display: grid;
  gap: 3px;
  padding-top: 15px;
  border-top: 1px solid var(--line);
}

.section-nav a {
  padding: 7px 10px;
  border-radius: 7px;
  color: var(--muted);
  font-size: 0.78rem;
  text-decoration: none;
}

.section-nav a:hover {
  background: var(--surface-soft);
  color: var(--blue-dark);
}

.dashboard-main {
  min-width: 0;
  padding: 28px 34px 54px;
}

.status-card {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--ink-soft);
  box-shadow: var(--shadow-sm);
}

.status-card[hidden] {
  display: none;
}

.status-card--error {
  display: block;
  border-color: #fecdd3;
  background: var(--pink-soft);
  color: #881337;
}

.status-card--error p {
  margin: 7px 0 0;
  line-height: 1.6;
}

.spinner {
  width: 19px;
  height: 19px;
  border: 2px solid #bfdbfe;
  border-top-color: var(--blue);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.dashboard-section {
  scroll-margin-top: 18px;
  margin-top: 30px;
}

.dashboard-section--first {
  margin-top: 0;
}

.section-heading {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 15px;
}

.section-heading h2 {
  margin: 0;
  color: var(--ink);
  font-size: clamp(1.18rem, 2vw, 1.45rem);
  letter-spacing: -0.025em;
}

.section-heading p:not(.section-kicker) {
  max-width: 800px;
  margin: 5px 0 0;
  color: var(--muted);
  font-size: 0.82rem;
  line-height: 1.55;
}

.as-of {
  flex: 0 0 auto;
  color: var(--muted);
  font-size: 0.76rem;
  white-space: nowrap;
}

.kpi-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 12px;
}

.kpi-card {
  min-width: 0;
  padding: 15px 15px 14px;
  border: 1px solid var(--line);
  border-top: 3px solid var(--blue);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow-sm);
}

.kpi-card:nth-child(5n + 2) { border-top-color: var(--gold); }
.kpi-card:nth-child(5n + 3) { border-top-color: var(--purple); }
.kpi-card:nth-child(5n + 4) { border-top-color: var(--olive); }
.kpi-card:nth-child(5n + 5) { border-top-color: var(--pink); }

.kpi-card__label {
  overflow: hidden;
  margin: 0;
  color: var(--ink-soft);
  font-size: 0.76rem;
  font-weight: 700;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.kpi-card__value {
  overflow: hidden;
  margin: 7px 0 8px;
  color: var(--ink);
  font-size: clamp(1.05rem, 1.55vw, 1.38rem);
  font-weight: 760;
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.025em;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.kpi-card__compare {
  display: flex;
  align-items: center;
  min-height: 20px;
  margin: 0;
  color: var(--muted);
  font-size: 0.7rem;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.delta {
  display: inline-flex;
  align-items: center;
  max-width: 100%;
  overflow: hidden;
  padding: 3px 7px;
  border-radius: 999px;
  background: var(--surface-soft);
  text-overflow: ellipsis;
}

.delta--up {
  background: var(--blue-soft);
  color: var(--blue-dark);
}

.delta--down {
  background: var(--gold-soft);
  color: #92400e;
}

.delta--flat,
.delta--na {
  color: var(--muted);
}

.kpi-card__previous {
  margin: 8px 0 0;
  color: var(--muted-light);
  font-size: 0.66rem;
  font-variant-numeric: tabular-nums;
}

.inline-empty {
  margin-top: 12px;
  padding: 14px 16px;
  border: 1px solid #bfdbfe;
  border-radius: var(--radius);
  background: var(--blue-soft);
  color: var(--blue-dark);
  font-size: 0.84rem;
}

.chart-grid {
  display: grid;
  align-items: stretch;
  gap: 14px;
}

.chart-grid--two {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.chart-card {
  min-width: 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--surface);
  box-shadow: var(--shadow-sm);
}

.chart-card--full {
  grid-column: 1 / -1;
}

.chart-card__heading {
  padding: 16px 18px 0;
}

.chart-card__heading h3 {
  margin: 0;
  color: var(--ink-soft);
  font-size: 0.92rem;
  font-weight: 720;
}

.chart-card__heading p {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 0.72rem;
  line-height: 1.5;
}

.plot {
  width: 100%;
  min-height: 340px;
}

.plot--tall {
  min-height: 520px;
}

.table-card {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--surface);
  box-shadow: var(--shadow-sm);
}

.table-scroll {
  overflow: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.78rem;
}

th,
td {
  padding: 11px 12px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: middle;
}

th {
  position: sticky;
  top: 0;
  z-index: 1;
  background: var(--surface-soft);
  color: var(--ink-soft);
  font-size: 0.7rem;
  font-weight: 740;
  white-space: nowrap;
}

tbody tr:last-child td {
  border-bottom: 0;
}

tbody tr:hover {
  background: #fafcff;
}

.number {
  text-align: right;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.rank-cell {
  color: var(--muted);
  font-weight: 760;
  font-variant-numeric: tabular-nums;
}

.product-cell {
  min-width: 210px;
  max-width: 310px;
  color: var(--ink-soft);
  font-weight: 650;
}

.product-cell span {
  display: -webkit-box;
  overflow: hidden;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
  line-height: 1.42;
}

.id-cell {
  color: var(--muted);
  font-family: Consolas, "SFMono-Regular", monospace;
  font-size: 0.7rem;
  white-space: nowrap;
}

.status-pill {
  display: inline-flex;
  align-items: center;
  max-width: 140px;
  overflow: hidden;
  padding: 3px 7px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface-soft);
  color: var(--ink-soft);
  font-size: 0.68rem;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.empty-row td,
.empty-list {
  padding: 24px 16px;
  color: var(--muted);
  text-align: center;
}

.leaderboard-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.leaderboard-card {
  overflow: hidden;
  border: 1px solid var(--line);
  border-top: 3px solid var(--blue);
  border-radius: var(--radius-lg);
  background: var(--surface);
  box-shadow: var(--shadow-sm);
}

.leaderboard-card:last-child {
  grid-column: 1 / -1;
}

.leaderboard-card--positive { border-top-color: var(--blue); }
.leaderboard-card--negative { border-top-color: var(--gold); }
.leaderboard-card--risk { border-top-color: var(--pink); }

.leaderboard-card__heading {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 16px 11px;
  border-bottom: 1px solid var(--line);
}

.leaderboard-card__heading h3 {
  margin: 0;
  color: var(--ink-soft);
  font-size: 0.88rem;
}

.leaderboard-card__heading span {
  color: var(--muted);
  font-size: 0.66rem;
  line-height: 1.4;
  text-align: right;
}

.leaderboard-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.leaderboard-item {
  display: grid;
  grid-template-columns: 24px minmax(0, 1fr) auto;
  align-items: center;
  gap: 9px;
  padding: 10px 15px;
  border-bottom: 1px solid var(--line);
}

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

.leaderboard-item__rank {
  color: var(--muted-light);
  font-size: 0.7rem;
  font-weight: 760;
  font-variant-numeric: tabular-nums;
}

.leaderboard-item__product {
  min-width: 0;
}

.leaderboard-item__name {
  display: block;
  overflow: hidden;
  color: var(--ink-soft);
  font-size: 0.76rem;
  font-weight: 650;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.leaderboard-item__id {
  display: block;
  overflow: hidden;
  margin-top: 2px;
  color: var(--muted-light);
  font-family: Consolas, "SFMono-Regular", monospace;
  font-size: 0.62rem;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.leaderboard-item__value {
  color: var(--ink);
  font-size: 0.73rem;
  font-weight: 740;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.channel-summary {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
  margin-bottom: 14px;
}

.channel-chip {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 9px;
  padding: 11px 13px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow-sm);
}

.channel-chip__label {
  display: flex;
  align-items: center;
  min-width: 0;
  gap: 8px;
  color: var(--ink-soft);
  font-size: 0.72rem;
  font-weight: 650;
}

.channel-chip__dot {
  flex: 0 0 auto;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--channel-color, var(--blue));
}

.channel-chip__values {
  color: var(--ink);
  font-size: 0.72rem;
  font-variant-numeric: tabular-nums;
  text-align: right;
  white-space: nowrap;
}

.channel-chip__values small {
  display: block;
  margin-top: 2px;
  color: var(--muted);
  font-size: 0.62rem;
}

.dashboard-footer {
  margin-top: 34px;
  padding: 18px 2px 0;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.72rem;
  line-height: 1.6;
}

.dashboard-footer p {
  margin: 4px 0;
}

.data-warning {
  color: #92400e;
}

.noscript-message {
  position: fixed;
  right: 20px;
  bottom: 20px;
  left: 20px;
  z-index: 1000;
  padding: 16px;
  border: 1px solid #fecdd3;
  border-radius: var(--radius);
  background: var(--pink-soft);
  color: #881337;
  text-align: center;
}

@media (max-width: 1280px) {
  .kpi-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .channel-summary {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 1020px) {
  .site-header__inner {
    padding-right: 22px;
    padding-left: 22px;
  }

  .app-shell {
    grid-template-columns: 1fr;
  }

  .filter-panel {
    position: static;
    max-height: none;
    padding: 20px 22px;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  #dashboardFilters {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .field--wide {
    grid-column: span 2;
  }

  .filter-summary {
    display: inline-flex;
    margin-right: 12px;
  }

  .filter-help {
    display: inline-block;
    width: calc(100% - 180px);
    margin-bottom: 12px;
    vertical-align: middle;
  }

  .section-nav {
    display: flex;
    flex-wrap: wrap;
  }

  .dashboard-main {
    padding: 24px 22px 48px;
  }
}

@media (max-width: 760px) {
  .site-header__inner {
    align-items: flex-start;
    flex-direction: column;
    gap: 14px;
    padding: 18px;
  }

  .snapshot-badge {
    white-space: normal;
  }

  .filter-panel,
  .dashboard-main {
    padding-right: 16px;
    padding-left: 16px;
  }

  #dashboardFilters {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .field--wide {
    grid-column: 1 / -1;
  }

  .filter-help {
    display: block;
    width: auto;
  }

  .kpi-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .chart-grid--two,
  .leaderboard-grid {
    grid-template-columns: 1fr;
  }

  .leaderboard-card:last-child {
    grid-column: auto;
  }

  .plot {
    min-height: 310px;
  }

  .plot--tall {
    min-height: 440px;
  }

  .section-heading {
    align-items: flex-start;
    flex-direction: column;
    gap: 8px;
  }

  .as-of {
    white-space: normal;
  }
}

@media (max-width: 480px) {
  #dashboardFilters,
  .kpi-grid,
  .channel-summary {
    grid-template-columns: 1fr;
  }

  .field--wide {
    grid-column: auto;
  }

  .kpi-card__value {
    font-size: 1.28rem;
  }

  .section-nav {
    display: none;
  }

  .leaderboard-card__heading {
    align-items: flex-start;
    flex-direction: column;
  }

  .leaderboard-card__heading span {
    text-align: left;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

@media print {
  body {
    background: #fff;
  }

  .site-header__inner {
    padding: 14px 0;
  }

  .app-shell {
    display: block;
  }

  .filter-panel {
    display: none;
  }

  .dashboard-main {
    padding: 16px 0;
  }

  .chart-card,
  .kpi-card,
  .leaderboard-card,
  .table-card {
    break-inside: avoid;
    box-shadow: none;
  }
}