/* 空调选购数据库 SPA */
:root {
  --bg: #f5f7fa;
  --card: #ffffff;
  --text: #1f2937;
  --muted: #6b7280;
  --accent: #0ea5e9;
  --accent-dark: #0284c7;
  --good: #16a34a;
  --warn: #d97706;
  --bad: #dc2626;
  --border: #e5e7eb;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: -apple-system, "Segoe UI", "Microsoft YaHei", sans-serif;
  background: var(--bg); color: var(--text); line-height: 1.5;
}
header {
  background: linear-gradient(135deg, #0ea5e9, #0284c7);
  color: #fff; padding: 24px 20px; text-align: center;
}
header h1 { font-size: 1.6rem; }
.subtitle { margin-top: 6px; font-size: 0.85rem; opacity: 0.9; }
main { max-width: none; width: 100%; margin: 0 auto; padding: 16px; }
.controls {
  background: var(--card); border: 1px solid var(--border);
  border-radius: 10px; padding: 14px; margin-bottom: 14px;
}
.filter-bar { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 10px; }
.filter-group {
  display: flex; flex-direction: column; gap: 4px;
  border: 1px solid var(--border); border-radius: 8px; padding: 8px 10px;
  background: #fafafa; font-size: 0.85rem;
}
.filter-group label { font-weight: 600; color: var(--muted); font-size: 0.78rem; }
.filter-group .options { display: flex; flex-wrap: wrap; gap: 6px; }
.chip {
  border: 1px solid var(--border); background: #fff; border-radius: 14px;
  padding: 3px 10px; cursor: pointer; user-select: none; font-size: 0.8rem;
}
.chip.active { background: var(--accent); color: #fff; border-color: var(--accent); }
.chip.required { border-style: dashed; }
.chip.required.active { background: var(--accent-dark); }
.sort-bar { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; font-size: 0.85rem; }
.sort-bar select {
  padding: 5px 8px; border: 1px solid var(--border); border-radius: 6px;
  background: #fff;
}
.sort-levels { display: flex; flex-wrap: wrap; gap: 6px; }
.sort-level {
  display: flex; align-items: center; gap: 6px;
  border: 1px solid var(--border); border-radius: 8px; padding: 4px 8px;
  background: #fafafa;
}
.sort-level-order { font-weight: 600; color: var(--accent-dark); font-size: 0.75rem; white-space: nowrap; }
.sort-level-remove {
  border: none; background: transparent; color: var(--bad); cursor: pointer;
  font-size: 1rem; line-height: 1; padding: 0 2px;
}
.add-sort-btn {
  border: 1px dashed var(--accent); background: #fff; color: var(--accent-dark);
  border-radius: 8px; padding: 5px 10px; cursor: pointer; font-size: 0.8rem;
}
.add-sort-btn:hover { background: #e0f2fe; }
.range-bar { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 10px; }
.range-group { flex-direction: row; align-items: center; gap: 6px; }
.range-group label { margin-bottom: 0; }
.range-input {
  width: 72px; padding: 3px 6px; border: 1px solid var(--border);
  border-radius: 6px; font-size: 0.78rem;
}
.range-clear {
  border: 1px solid var(--border); background: #fff; border-radius: 6px;
  padding: 2px 6px; cursor: pointer; font-size: 0.72rem; color: var(--muted);
}
.result-count { margin-left: auto; color: var(--muted); }
.table-wrap {
  overflow-x: auto; overflow-y: hidden;  /* 竖向由页面滚动（表格自然高度），横向容器内滚动 */
  background: var(--card); border-radius: 10px; border: 1px solid var(--border);
  position: relative;
  /* 隐藏原生横向滚动条（由浮动 .table-scrollbar 替代） */
  scrollbar-width: none; -ms-overflow-style: none;
}
.table-wrap::-webkit-scrollbar { display: none; height: 0; }
table { width: 100%; border-collapse: collapse; font-size: 0.82rem; white-space: nowrap; }
/* 浮动横向滚动条（wrap 外，sticky 相对页面）：默认透明，hover 表格/滚动条时浮现；
   sticky bottom:0 在表格可见期间钉在视口底部；原生 thumb 保留（拖动目标） */
.table-scrollbar {
  position: sticky; bottom: 0; height: 16px; overflow-x: scroll; overflow-y: hidden;
  opacity: 0; transition: opacity 0.2s; background: #f1f5f9;
  border: 1px solid var(--border); border-top: none; border-radius: 0 0 10px 10px;
  cursor: pointer; z-index: 5; margin-top: -1px;
}
.table-scrollbar::-webkit-scrollbar { height: 16px; }
.table-scrollbar::-webkit-scrollbar-thumb { background: #94a3b8; border-radius: 8px; }
.table-scrollbar::-webkit-scrollbar-track { background: transparent; }
.table-wrap:hover ~ .table-scrollbar, .table-scrollbar:hover { opacity: 1; }
.table-scrollbar-inner { height: 1px; }
/* 固定表头（JS 克隆层）：竖向滚动表头出视口时钉在顶部 */
#sticky-header {
  position: fixed; top: 0; left: 0; z-index: 100; display: none;
  background: #f1f5f9; box-shadow: 0 2px 6px rgba(0, 0, 0, 0.12);
  border-bottom: 2px solid var(--border); border-radius: 0 0 8px 8px;
  font-size: 0.82rem; white-space: nowrap; pointer-events: auto;
}
#sticky-header table { width: auto; border-collapse: collapse; }
#sticky-header th {
  padding: 8px 10px; text-align: left; cursor: pointer; user-select: none;
  box-sizing: border-box; overflow: hidden; text-overflow: ellipsis;
}
#sticky-header th:hover { color: var(--accent); }
thead th {
  background: #f1f5f9; padding: 8px 10px; text-align: left;
  border-bottom: 2px solid var(--border); position: sticky; top: 0;
  cursor: pointer; user-select: none;
}
thead th:hover { color: var(--accent); }
tbody td { padding: 7px 10px; border-bottom: 1px solid var(--border); }
tbody tr:hover { background: #f8fafc; }
td.unknown { color: var(--muted); }
td.good { color: var(--good); font-weight: 600; }
td.warn { color: var(--warn); font-weight: 600; }
td.bad { color: var(--bad); font-weight: 600; }
.source-tag {
  display: inline-block; background: #e0f2fe; color: var(--accent-dark);
  border-radius: 10px; padding: 1px 8px; font-size: 0.72rem; margin-right: 3px;
}
footer { text-align: center; color: var(--muted); font-size: 0.75rem; padding: 18px; }
@media (max-width: 720px) { .filter-bar { flex-direction: column; } }