/* PC 端设计体系 — 独立桌面布局，不复用手机样式 */
:root {
  --pc-container: 1280px;
  --pc-radius: 12px;
  --pc-radius-sm: 8px;
  --pc-shadow: 0 1px 3px rgba(15, 23, 42, 0.06), 0 8px 24px rgba(15, 23, 42, 0.04);
  --pc-shadow-lg: 0 12px 40px rgba(15, 23, 42, 0.1);
  --pc-bg: #eef1f6;
  --pc-surface: #ffffff;
  --pc-text: #1e293b;
  --pc-text-muted: #64748b;
  --pc-text-light: #94a3b8;
  --pc-border: #e2e8f0;
  --pc-accent: #b8860b;
  --pc-accent-light: #fef3c7;
  --pc-accent-dark: #92400e;
  --pc-green: #059669;
  --pc-purple: #7c3aed;
  --pc-blue: #2563eb;
  --pc-red: #dc2626;
  --pc-font: -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }

html { font-size: 14px; }

body.pc-app {
  margin: 0;
  font-family: var(--pc-font);
  background: var(--pc-bg);
  color: var(--pc-text);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button, input, select, textarea { font: inherit; }
ul, ol { margin: 0; padding: 0; list-style: none; }

.pc-app-frame {
  min-height: 100vh;
}

.pc-page-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 20px;
}

.pc-page-title {
  margin: 0;
  font-size: 22px;
  font-weight: 700;
  color: var(--pc-text);
  letter-spacing: -0.02em;
}

.pc-page-sub {
  margin: 4px 0 0;
  font-size: 13px;
  color: var(--pc-text-muted);
}

.pc-page-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.pc-grid { display: grid; gap: 16px; }
.pc-grid-2 { grid-template-columns: repeat(2, 1fr); }
.pc-grid-3 { grid-template-columns: repeat(3, 1fr); }
.pc-grid-4 { grid-template-columns: repeat(4, 1fr); }
.pc-grid-5 { grid-template-columns: repeat(5, 1fr); }

@media (max-width: 1200px) {
  .pc-grid-4, .pc-grid-5 { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 960px) {
  .pc-grid-3, .pc-grid-4, .pc-grid-5 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
  .pc-grid-2, .pc-grid-3, .pc-grid-4, .pc-grid-5 { grid-template-columns: 1fr; }
}