.platform-metrics {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin-bottom: 16px;
}
.platform-block {
  min-width: 0;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(15, 29, 45, .72);
  box-shadow: var(--shadow);
}
.platform-block.meituan { border-color: rgba(255, 191, 95, .3); }
.platform-block.douyin { border-color: rgba(82, 200, 245, .3); }
.platform-block-title { display: flex; align-items: center; gap: 11px; margin: 0 2px 13px; }
.platform-block-title b, .platform-block-title small { display: block; }
.platform-block-title b { font-size: 17px; }
.platform-block-title small { color: var(--muted); font-size: 11px; }
.platform-badge { width: 38px; height: 38px; display: grid; place-items: center; border-radius: 12px; font-weight: 900; }
.platform-badge.meituan { color: #ffd28b; background: #49351d; }
.platform-badge.douyin { color: #8ce8e5; background: #173b45; }
.platform-card-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 9px; }
.platform-card-grid .metric { padding: 14px; box-shadow: none; }
.platform-card-grid .metric strong { font-size: 22px; }
.trend-legend { display: flex; gap: 10px; flex-wrap: wrap; justify-content: flex-end; color: var(--muted); font-size: 10px; }
.trend-legend span::before { content: ""; display: inline-block; width: 7px; height: 7px; margin-right: 4px; border-radius: 50%; }
.trend-legend .mt-good::before { background: #ffbf5f; }
.trend-legend .mt-bad::before { background: #ff6b73; }
.trend-legend .dy-good::before { background: #52c8f5; }
.trend-legend .dy-bad::before { background: #c77dff; }
.bar.mt-p { background: #ffbf5f; }
.bar.mt-n { background: #ff6b73; }
.bar.dy-p { background: #52c8f5; }
.bar.dy-n { background: #c77dff; }

@media (max-width: 1100px) {
  .platform-metrics { grid-template-columns: 1fr; }
}
@media (max-width: 760px) {
  .sidebar nav { grid-template-columns: repeat(4, minmax(78px, 1fr)); overflow-x: auto; }
  .nav { white-space: nowrap; }
  main { width: 100%; }
  .platform-card-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .platform-block { padding: 13px; }
  .panel-title { align-items: flex-start; flex-direction: column; }
  .trend-legend { justify-content: flex-start; }
}