/* 抖音本地生活直播数据分析系统 - 样式（PHP版） */
:root {
  --primary: #e4002b;
  --primary-dark: #b80022;
  --bg: #f0f2f5;
  --card: #ffffff;
  --text: #1a1a2e;
  --text-secondary: #6b7280;
  --border: #e5e7eb;
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
  --info: #3b82f6;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  background: var(--bg); color: var(--text); line-height: 1.6;
}
.navbar {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  padding: 0 24px; height: 60px; display: flex; align-items: center; justify-content: space-between;
  box-shadow: 0 2px 8px rgba(228,0,43,0.15); position: sticky; top: 0; z-index: 100;
}
.navbar-brand { color: #fff; font-size: 18px; font-weight: 700; display: flex; align-items: center; gap: 10px; text-decoration: none; }
.navbar-brand .logo { width: 32px; height: 32px; background: #fff; border-radius: 8px; display: flex; align-items: center; justify-content: center; color: var(--primary); font-weight: 800; font-size: 14px; }
.navbar-nav { display: flex; gap: 4px; list-style: none; }
.navbar-nav a { color: rgba(255,255,255,0.85); text-decoration: none; padding: 8px 16px; border-radius: 6px; font-size: 14px; transition: all 0.2s; }
.navbar-nav a:hover, .navbar-nav a.active { background: rgba(255,255,255,0.15); color: #fff; }
.main { max-width: 1400px; margin: 0 auto; padding: 24px 20px; }
.page-header { margin-bottom: 20px; display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 10px; }
.page-title { font-size: 22px; font-weight: 700; }
.page-subtitle { font-size: 13px; color: var(--text-secondary); margin-top: 4px; }
.card { background: var(--card); border-radius: 12px; padding: 20px; margin-bottom: 16px; box-shadow: 0 1px 3px rgba(0,0,0,0.05); }
.card-title { font-size: 16px; font-weight: 700; margin-bottom: 16px; padding-left: 10px; border-left: 3px solid var(--primary); }
.kpi-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; margin-bottom: 20px; }
.kpi-card { background: var(--card); border-radius: 12px; padding: 18px; text-align: center; border-top: 3px solid var(--primary); box-shadow: 0 1px 3px rgba(0,0,0,0.05); }
.kpi-value { font-size: 28px; font-weight: 700; color: var(--primary); }
.kpi-label { font-size: 12px; color: var(--text-secondary); margin-top: 4px; }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 13px; }
th { background: #f8f9fa; color: #374151; font-weight: 600; padding: 10px 12px; text-align: left; border-bottom: 2px solid var(--border); white-space: nowrap; }
td { padding: 10px 12px; border-bottom: 1px solid #f3f4f6; color: #4b5563; }
tr:hover td { background: #f9fafb; }
.tag { display: inline-block; padding: 2px 8px; border-radius: 4px; font-size: 11px; font-weight: 500; }
.tag-s { background: #fef3c7; color: #92400e; }
.tag-a { background: #dcfce7; color: #166534; }
.tag-b { background: #dbeafe; color: #1e40af; }
.tag-c { background: #fef3c7; color: #92400e; }
.tag-d { background: #fee2e2; color: #991b1b; }
.tag-active { background: #dcfce7; color: #16a34a; }
.rank-1 { color: #f59e0b; font-weight: 700; }
.rank-2 { color: #6b7280; font-weight: 700; }
.rank-3 { color: #d97706; font-weight: 700; }
.btn { display: inline-block; padding: 8px 18px; border-radius: 6px; font-size: 13px; font-weight: 500; text-decoration: none; cursor: pointer; border: none; transition: all 0.2s; }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-secondary { background: #f3f4f6; color: #374151; border: 1px solid var(--border); }
.btn-secondary:hover { background: #e5e7eb; }
.btn-danger { background: var(--danger); color: #fff; }
.btn-sm { padding: 4px 10px; font-size: 12px; }
.form-group { margin-bottom: 16px; }
.form-label { display: block; font-size: 13px; font-weight: 500; color: #374151; margin-bottom: 6px; }
.form-input, .form-select { width: 100%; padding: 8px 12px; border: 1px solid var(--border); border-radius: 6px; font-size: 13px; outline: none; }
.form-input:focus, .form-select:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(228,0,43,0.1); }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.diagnosis-card { background: #fafbfc; border-radius: 10px; padding: 16px; margin-bottom: 12px; border-left: 4px solid var(--primary); }
.diagnosis-card h4 { font-size: 14px; margin-bottom: 10px; color: var(--text); }
.strength-item { font-size: 13px; color: #059669; margin-bottom: 4px; padding-left: 8px; }
.issue-item { font-size: 13px; margin-bottom: 4px; padding-left: 8px; }
.issue-high { color: #dc2626; font-weight: 600; }
.issue-mid { color: #d97706; font-weight: 600; }
.suggestion-box { background: #eff6ff; border-left: 3px solid var(--info); padding: 8px 12px; margin: 6px 0 6px 20px; border-radius: 0 6px 6px 0; font-size: 12px; color: #1e40af; }
.best-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 12px; margin-bottom: 16px; }
.best-item { background: linear-gradient(135deg, #fef2f2 0%, #fff 100%); border: 1px solid #fecaca; border-radius: 10px; padding: 14px; text-align: center; }
.best-label { font-size: 11px; color: var(--text-secondary); }
.best-name { font-size: 14px; color: var(--primary); font-weight: 600; margin-top: 6px; }
.chart { width: 100%; height: 340px; }
.chart-sm { width: 100%; height: 280px; }
.empty-state { text-align: center; padding: 60px 20px; color: var(--text-secondary); }
.empty-state .icon { font-size: 48px; margin-bottom: 16px; }
.empty-state h3 { font-size: 18px; margin-bottom: 8px; color: var(--text); }
.flash { padding: 12px 16px; border-radius: 8px; margin-bottom: 16px; font-size: 13px; }
.flash-success { background: #dcfce7; color: #166534; border: 1px solid #bbf7d0; }
.flash-error { background: #fee2e2; color: #991b1b; border: 1px solid #fecaca; }
.score-circle { width: 72px; height: 72px; border-radius: 50%; background: var(--primary); color: #fff; display: flex; align-items: center; justify-content: center; font-size: 24px; font-weight: 700; }
@media (max-width: 768px) {
  .kpi-grid { grid-template-columns: repeat(2, 1fr); }
  .grid-2, .form-row { grid-template-columns: 1fr; }
  .best-grid { grid-template-columns: repeat(2, 1fr); }
}