:root {
  --bg: #f6f3ee;
  --ink: #1a1a1a;
  --muted: #5c5c5c;
  --card: #fffdf9;
  --line: #d9d2c6;
  --taobao: #e65c00;
  --jd: #c41e3a;
  --douyin: #111111;
  --green: #1b7f4a;
  --yellow: #b8860b;
  --red: #b42318;
  --accent: #0b5fff;
  --radius: 10px;
  --font: "PingFang SC", "Noto Sans SC", "Source Han Sans SC", "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }
html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font);
  line-height: 1.5;
}
body {
  background-image:
    radial-gradient(ellipse at 10% 0%, rgba(11, 95, 255, 0.06), transparent 45%),
    radial-gradient(ellipse at 90% 10%, rgba(230, 92, 0, 0.07), transparent 40%);
  min-height: 100vh;
}

.top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
  padding: 1.25rem 1.25rem 0.5rem;
  max-width: 1100px;
  margin: 0 auto;
}
.brand h1 {
  margin: 0;
  font-size: clamp(1.4rem, 4vw, 2rem);
  letter-spacing: 0.02em;
}
.sub { margin: 0.25rem 0 0; color: var(--muted); font-size: 0.95rem; }

.badge {
  padding: 0.4rem 0.75rem;
  border-radius: 999px;
  font-size: 0.85rem;
  font-weight: 600;
  white-space: nowrap;
  border: 1px solid transparent;
}
.badge-green { background: #e8f7ee; color: var(--green); border-color: #b7e0c5; }
.badge-yellow { background: #fff6d9; color: var(--yellow); border-color: #f0d98a; }
.badge-red { background: #fdecea; color: var(--red); border-color: #f0b4ae; }
.badge-gray { background: #eee; color: #666; }

.qa-banner {
  max-width: 1100px;
  margin: 0.5rem auto;
  padding: 0.65rem 1rem;
  background: #fff3cd;
  border: 1px solid #f0d98a;
  border-radius: var(--radius);
  color: #6b4e00;
}
.qa-banner.ok { background: #e8f7ee; border-color: #b7e0c5; color: var(--green); }
.qa-banner.hidden { display: none; }

.demo-banner {
  max-width: none;
  margin: 0;
  padding: 0.75rem 1.25rem;
  background: #b42318;
  color: #fff;
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: 0.02em;
  text-align: center;
  border-bottom: 3px solid #7a140f;
}
.demo-banner.hidden { display: none; }

.coverage-bar {
  max-width: none;
  margin: 0;
  padding: 0.55rem 1.25rem;
  background: #1a1a1a;
  color: #f6f3ee;
  font-size: 0.92rem;
  text-align: center;
  border-bottom: 1px solid #333;
}

main {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0.5rem 1.25rem 2rem;
  display: grid;
  gap: 1rem;
}
.block {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1rem 1.1rem 1.2rem;
}
.block h2 {
  margin: 0 0 0.35rem;
  font-size: 1.1rem;
}
.hint { margin: 0 0 0.75rem; color: var(--muted); font-size: 0.88rem; }
.map-hint code {
  background: #f0ebe3;
  padding: 0.1rem 0.35rem;
  border-radius: 4px;
  font-size: 0.82em;
}

.controls {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.25rem;
  margin-bottom: 0.75rem;
}
.controls label {
  font-size: 0.9rem;
  color: var(--muted);
  display: flex;
  align-items: center;
  gap: 0.4rem;
}
.controls select {
  font: inherit;
  padding: 0.25rem 0.45rem;
  border-radius: 6px;
  border: 1px solid var(--line);
  background: #fff;
}

.chart {
  width: 100%;
  min-height: 220px;
  overflow-x: auto;
}
.chart svg { display: block; width: 100%; height: auto; max-height: 280px; }
.legend {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.25rem;
  margin-top: 0.5rem;
  font-size: 0.85rem;
}
.legend span::before {
  content: "";
  display: inline-block;
  width: 10px;
  height: 10px;
  border-radius: 2px;
  margin-right: 0.35rem;
  vertical-align: middle;
}
.leg-taobao::before { background: var(--taobao); }
.leg-jd::before { background: var(--jd); }
.leg-douyin::before { background: var(--douyin); }

.table-wrap { overflow-x: auto; }
table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
}
th, td {
  text-align: left;
  padding: 0.45rem 0.4rem;
  border-bottom: 1px solid var(--line);
}
th { color: var(--muted); font-weight: 600; }
td.num { font-variant-numeric: tabular-nums; text-align: right; }

footer {
  max-width: 1100px;
  margin: 0 auto 2rem;
  padding: 0 1.25rem;
  color: var(--muted);
  font-size: 0.82rem;
}

.brand-controls .grow { flex: 1 1 220px; flex-direction: column; align-items: stretch; }
.brand-controls select[multiple] {
  min-height: 8rem;
  width: 100%;
}
.plat-set {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0.4rem 0.75rem;
  margin: 0;
}
.plat-set legend { padding: 0 0.25rem; color: var(--muted); font-size: 0.85rem; }
.plat-set label { display: block; margin: 0.2rem 0; }
button {
  font: inherit;
  padding: 0.4rem 0.9rem;
  border-radius: 8px;
  border: 1px solid var(--accent);
  background: var(--accent);
  color: #fff;
  cursor: pointer;
}
button.secondary {
  background: #fff;
  color: var(--ink);
  border-color: var(--line);
}
.top a, .sub a { color: var(--accent); }

@media (max-width: 640px) {
  .top { flex-direction: column; align-items: stretch; }
  .badge { align-self: flex-start; }
  th:nth-child(5), td:nth-child(5) { display: none; }
}