:root {
  --bg: #f3f7fc;
  --surface: #ffffff;
  --surface-soft: #f7fbff;
  --line: #d9e5f2;
  --line-strong: #b9cce2;
  --text: #132238;
  --muted: #5c6d82;
  --primary: #1877f2;
  --primary-soft: rgba(24, 119, 242, 0.1);
  --accent: #15b79e;
  --warning: #b45309;
  --warning-soft: rgba(245, 158, 11, 0.14);
  --danger: #c2410c;
  --danger-soft: rgba(194, 65, 12, 0.12);
  --success-soft: rgba(21, 183, 158, 0.14);
  --shadow: 0 14px 40px rgba(15, 34, 60, 0.08);
  --radius: 22px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: "Microsoft YaHei", "PingFang SC", sans-serif;
  color: var(--text);
  background: linear-gradient(180deg, #edf4ff 0%, var(--bg) 240px);
}

a { color: inherit; text-decoration: none; }
button, input, select { font: inherit; }

.page-shell {
  width: min(1380px, calc(100% - 28px));
  margin: 0 auto;
  padding: 18px 0 28px;
}

.narrow-shell { width: min(1240px, calc(100% - 28px)); }

main {
  display: grid;
  gap: 18px;
}

.topbar,
.section-header,
.footer {
  display: flex;
  justify-content: space-between;
  gap: 14px;
}

.topbar { align-items: center; margin-bottom: 14px; }

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-badge {
  width: 42px;
  height: 42px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff;
  font-weight: 700;
}

.brand small,
.topnav,
.section-kicker,
.section-note,
.eyebrow,
.hero-note,
.kpi-card small,
.helper-text,
.footer-meta,
.meta-list,
.pill,
.drawer-metadata,
.kpi-label,
.module-state,
.range-meta {
  color: var(--muted);
}

.topnav {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  font-size: 0.94rem;
}

.card {
  background: var(--surface);
  border: 1px solid rgba(217, 229, 242, 0.84);
  border-radius: 18px;
  box-shadow: var(--shadow);
  padding: 16px;
}

.hero,
.map-layout,
.compare-layout,
.ai-layout,
.two-column {
  display: grid;
  gap: 14px;
}

.hero {
  grid-template-columns: minmax(0, 1.6fr) minmax(320px, 0.95fr);
  align-items: start;
}

.hero h1,
.about-layout h1 {
  margin: 4px 0 8px;
  font-size: clamp(1.85rem, 3.8vw, 3rem);
  line-height: 1.08;
}

.hero-subtitle {
  margin: 0 0 14px;
  font-size: 0.98rem;
  line-height: 1.65;
  color: var(--muted);
  max-width: 700px;
}

.hero-meta,
.chip-grid,
.period-toggle,
.chart-controls,
.about-stats {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.hero-search {
  display: grid;
  grid-template-columns: minmax(0, 1fr) repeat(3, auto);
  align-items: center;
}

.hero-search input,
.filter-grid select,
.ai-form select {
  min-height: 40px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: #fff;
  padding: 0 12px;
}

.hero-search input {
  flex: 1 1 320px;
  min-width: 0;
}

.btn,
.chip,
.toggle-btn,
.pill {
  min-height: 40px;
  border-radius: 12px;
  border: 1px solid transparent;
  padding: 0 14px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.btn,
.chip,
.toggle-btn,
.link-button,
.picker-item button,
.drawer-close {
  cursor: pointer;
  transition: transform 0.18s ease, box-shadow 0.18s ease, border-color 0.18s ease;
}

.btn:hover,
.chip:hover,
.toggle-btn:hover,
.link-button:hover,
.picker-item button:hover,
.drawer-close:hover {
  transform: translateY(-1px);
}

.btn-primary { background: var(--primary); color: #fff; }
.btn-secondary { background: #fff; border-color: var(--line); }
.btn-accent { background: var(--accent); color: #fff; }

.chip,
.toggle-btn,
.pill {
  background: #fff;
  border-color: var(--line);
}

.chip.is-active,
.toggle-btn.is-active {
  background: var(--primary-soft);
  border-color: rgba(24, 119, 242, 0.3);
  color: var(--primary);
}

.pill {
  min-height: auto;
  padding: 7px 11px;
  font-size: 0.84rem;
}

.pill-muted { background: #f8fbff; }

.hero-side {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  align-content: start;
}

.mini-stat {
  padding: 14px;
  border-radius: 14px;
  background: linear-gradient(135deg, rgba(24, 119, 242, 0.08), rgba(21, 183, 158, 0.08));
}

.mini-stat strong {
  display: block;
  font-size: 1.55rem;
  margin-bottom: 4px;
}

.mini-stat span {
  display: block;
  font-size: 0.83rem;
  line-height: 1.4;
}

.hero-note {
  grid-column: 1 / -1;
  margin: 0;
  padding: 10px 12px;
  border-radius: 12px;
  background: var(--surface-soft);
  border: 1px solid rgba(217, 229, 242, 0.84);
}

.section-block,
.two-column { margin-bottom: 18px; }

.section-header {
  align-items: end;
  margin-bottom: 12px;
}

.section-header h2,
.section-header h3 {
  margin: 2px 0 0;
  line-height: 1.25;
}

.filter-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 10px;
}

.filter-grid label,
.ai-form label {
  display: grid;
  gap: 6px;
  font-size: 0.9rem;
  color: var(--muted);
}

.inline-select {
  display: inline-grid;
  gap: 6px;
  color: var(--muted);
}

.inline-select select,
.filter-grid select,
.ai-form select,
.ai-form input[type="range"] {
  width: 100%;
}

.kpi-grid {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 10px;
  margin-bottom: 18px;
}

.kpi-card strong {
  display: block;
  font-size: 1.35rem;
  margin: 8px 0 4px;
}

.chart {
  width: 100%;
  min-height: 280px;
}

.chart-map { min-height: 460px; }
.chart-medium { min-height: 340px; }

.chart-shell {
  position: relative;
  min-height: 280px;
}

.module-state {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 18px;
  border: 1px dashed var(--line-strong);
  border-radius: 14px;
  background: rgba(247, 251, 255, 0.92);
  z-index: 2;
  line-height: 1.7;
}

.module-state-hidden { display: none; }
.module-state-error {
  background: rgba(255, 248, 244, 0.98);
  border-color: rgba(194, 65, 12, 0.22);
  color: var(--danger);
}

.module-state-warning {
  background: rgba(255, 251, 235, 0.98);
  border-color: rgba(180, 83, 9, 0.2);
  color: var(--warning);
}

.module-state-loading {
  background: rgba(247, 251, 255, 0.98);
}

.two-column { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.map-layout { grid-template-columns: minmax(0, 2.3fr) 320px; }
.compare-layout { grid-template-columns: 280px minmax(0, 1fr); }
.ai-layout { grid-template-columns: 320px minmax(0, 1fr); }

.side-stack,
.compare-charts,
.ai-results {
  display: grid;
  gap: 14px;
}

.side-stack,
.compare-picker-card,
.ai-form-card {
  align-self: start;
}

.side-stack {
  position: sticky;
  top: 14px;
}

.compare-picker-card,
.ai-form-card {
  position: sticky;
  top: 14px;
}

.side-panel,
.dimension-grid div,
.source-grid div {
  background: var(--surface-soft);
  border: 1px solid rgba(217, 229, 242, 0.84);
  border-radius: 14px;
  padding: 12px;
}

.meta-list,
.bullet-list {
  margin: 8px 0 0;
  padding-left: 18px;
  line-height: 1.55;
}

.ranking-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.card-span-2 { grid-column: span 2; }

.ranking-list {
  margin: 0;
  padding-left: 22px;
  display: grid;
  gap: 8px;
}

.ranking-list li {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}

.link-button {
  border: 0;
  background: transparent;
  color: var(--primary);
  padding: 0;
}

.picker-list {
  display: grid;
  gap: 8px;
  max-height: 480px;
  overflow: auto;
}

.picker-item {
  display: flex;
  align-items: center;
  gap: 10px;
  justify-content: space-between;
  padding: 8px 10px;
  border: 1px solid var(--line);
  border-radius: 12px;
}

.picker-item input { margin-right: 6px; }

.picker-item button,
.drawer-close {
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 10px;
  padding: 6px 10px;
  color: var(--primary);
}

.dimension-grid,
.source-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.ai-form { display: grid; gap: 10px; }

.range-meta {
  justify-self: start;
  min-width: 44px;
  padding: 3px 8px;
  border-radius: 999px;
  background: #f4f8fe;
  border: 1px solid var(--line);
  font-size: 0.8rem;
}

.recommendation-list { display: grid; gap: 12px; }

.recommendation-card {
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 12px;
  background: linear-gradient(180deg, #fff, #f8fbff);
}

.recommendation-card h4 { margin: 0 0 6px; }

.score-row {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 8px;
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  border-radius: 999px;
  padding: 4px 8px;
  font-size: 0.8rem;
  background: var(--primary-soft);
  color: var(--primary);
}

.tag-warning {
  background: var(--warning-soft);
  color: var(--warning);
}

.rich-text { line-height: 1.6; color: var(--text); }
.rich-text p { margin: 0 0 8px; }

.table-wrap { overflow: auto; }

table {
  width: 100%;
  border-collapse: collapse;
  min-width: 920px;
}

th,
td {
  padding: 10px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

th {
  background: #f7fbff;
  color: var(--muted);
}

.faq-list { display: grid; gap: 10px; }

details {
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 12px 14px;
  background: #fff;
}

summary { cursor: pointer; font-weight: 600; }

.footer {
  align-items: center;
  margin-top: 18px;
}

.status-banner {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
  padding: 10px 12px;
  border-radius: 14px;
  border: 1px solid transparent;
}

.status-banner-hidden { display: none; }
.status-banner-info {
  background: #f7fbff;
  border-color: var(--line);
}
.status-banner-warning {
  background: rgba(255, 251, 235, 0.98);
  border-color: rgba(180, 83, 9, 0.2);
  color: var(--warning);
}
.status-banner-error {
  background: rgba(255, 248, 244, 0.98);
  border-color: rgba(194, 65, 12, 0.2);
  color: var(--danger);
}

.drawer {
  position: fixed;
  inset: 0;
  display: none;
  z-index: 90;
}

.drawer.is-open { display: block; }

.drawer-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(15, 34, 60, 0.38);
}

.drawer-panel {
  position: absolute;
  top: 0;
  right: 0;
  width: min(520px, 100%);
  height: 100%;
  background: #fff;
  box-shadow: -18px 0 44px rgba(15, 34, 60, 0.16);
  padding: 16px;
  overflow: auto;
}

.drawer-close {
  position: sticky;
  top: 0;
  margin-left: auto;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  color: var(--text);
}

.drawer-content h2 { margin-top: 0; }

.drawer-metric-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin: 10px 0;
}

.drawer-metric {
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 10px;
}

.drawer-metric strong {
  display: block;
  font-size: 1.1rem;
  margin-top: 4px;
}

.empty-state { color: var(--muted); padding: 4px 0; }

.about-layout {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  align-items: start;
}

.about-span-2 {
  grid-column: 1 / -1;
}

@media (max-width: 1180px) {
  .hero,
  .map-layout,
  .two-column,
  .compare-layout,
  .ai-layout {
    grid-template-columns: 1fr;
  }

  .kpi-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .filter-grid { grid-template-columns: repeat(3, minmax(180px, 1fr)); }
  .hero-side,
  .dimension-grid,
  .source-grid,
  .about-layout {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .side-stack,
  .compare-picker-card,
  .ai-form-card {
    position: static;
  }
}

@media (max-width: 720px) {
  .page-shell {
    width: min(100% - 20px, 100%);
    padding-top: 14px;
  }

  .topbar,
  .footer {
    flex-direction: column;
    align-items: flex-start;
  }

  .kpi-grid,
  .filter-grid,
  .ranking-grid,
  .dimension-grid,
  .source-grid,
  .drawer-metric-grid,
  .about-layout,
  .hero-side,
  .hero-search {
    grid-template-columns: 1fr;
  }

  .card-span-2 { grid-column: auto; }
  .about-span-2 { grid-column: auto; }
  .hero-search { flex-direction: column; }
  .hero-search .btn { width: 100%; }
}