/* 汽车年报数据看板 —— 样式（复用销量看板视觉语言） */
* { box-sizing: border-box; }
body {
    margin: 0;
    font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
    background: #f0f2f5;
    color: #1f2329;
}
.board-wrap { max-width: 1280px; margin: 0 auto; padding: 16px 20px 40px; }

/* 头部 */
.board-header { padding: 12px 0 8px; }
.board-header h1 { margin: 0; font-size: 22px; color: #2f3b52; }
.board-sub { margin: 4px 0 0; font-size: 13px; color: #8a94a6; }

/* 筛选区 */
.board-filters {
    display: flex;
    flex-wrap: wrap;
    gap: 24px;
    background: #fff;
    border: 1px solid #e5e9f0;
    border-radius: 8px;
    padding: 14px 18px;
    margin: 14px 0 18px;
}
.filter-group { display: flex; align-items: center; flex-wrap: wrap; gap: 12px; }
.filter-label { font-weight: 600; color: #2f3b52; }
.filter-group label { cursor: pointer; font-size: 14px; }
.filter-hint { font-size: 12px; color: #a0a8b5; }

/* 图表卡片 */
.board-charts {
    display: grid;
    grid-template-columns: 1fr;
    gap: 16px;
}
.chart-card {
    background: #fff;
    border: 1px solid #e5e9f0;
    border-radius: 8px;
    padding: 12px 14px;
}
.chart-title { margin: 0 0 8px; font-size: 15px; color: #2f3b52; }
.chart-box { width: 100%; height: 420px; }

/* 提示条 */
.board-tip {
    margin-top: 16px;
    padding: 10px 14px;
    border-radius: 6px;
    background: #eaf2ff;
    color: #2f6fed;
    font-size: 13px;
}
.board-tip.err { background: #fdecec; color: #d14836; }

/* 窄屏自适应 */
@media (max-width: 860px) {
    .board-charts { grid-template-columns: 1fr; }
}