:root {
  --bg: #f4f6fa;
  --card: #ffffff;
  --ink: #1f2733;
  --muted: #7a869a;
  --line: #e6eaf0;
  --brand: #2f6bff;
  --red: #e0392b;   /* 涨 = 红 */
  --green: #1aa35a; /* 跌 = 绿 */
  --shadow: 0 1px 3px rgba(20,30,50,.06), 0 6px 18px rgba(20,30,50,.05);
}
* { box-sizing: border-box; }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font-family: -apple-system, "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
  font-size: 14px; line-height: 1.5;
}
.topbar {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 24px; background: var(--card); border-bottom: 1px solid var(--line);
  position: sticky; top: 0; z-index: 10;
}
.brand { display: flex; align-items: center; gap: 12px; }
.logo { font-size: 28px; }
.topbar h1 { font-size: 18px; margin: 0; }
.sub { margin: 2px 0 0; color: var(--muted); font-size: 12px; }
.topbar-right { display: flex; align-items: center; gap: 10px; }
.tag {
  font-size: 12px; color: var(--muted); background: #eef2f8;
  padding: 4px 10px; border-radius: 20px;
}
.banner { padding: 10px 24px; font-size: 13px; }
.banner.demo { background: #fff4e0; color: #8a5a00; border-bottom: 1px solid #ffe2b0; }
.banner.warn { background: #fdeeee; color: #a33; border-bottom: 1px solid #f6d6d6; }
.hidden { display: none; }
.container { max-width: 1180px; margin: 18px auto; padding: 0 18px; }
.card {
  background: var(--card); border: 1px solid var(--line); border-radius: 12px;
  padding: 18px 20px; margin-bottom: 18px; box-shadow: var(--shadow);
}
.card h2 { font-size: 16px; margin: 0 0 14px; }
.card h3 { font-size: 14px; margin: 14px 0 8px; color: #445; }
.muted { color: var(--muted); font-size: 12px; }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.tbl { width: 100%; border-collapse: collapse; font-size: 13px; }
.tbl th, .tbl td { padding: 7px 8px; border-bottom: 1px solid var(--line); text-align: right; }
.tbl th:first-child, .tbl td:first-child,
.tbl th:nth-child(2), .tbl td:nth-child(2) { text-align: left; }
.tbl thead th { color: var(--muted); font-weight: 600; background: #fafbfd; }
.stat-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.stat {
  background: #f7f9fc; border: 1px solid var(--line); border-radius: 8px;
  padding: 10px 12px;
}
.stat .k { font-size: 12px; color: var(--muted); }
.stat .v { font-size: 18px; font-weight: 700; margin-top: 2px; }
.sentiment { margin-top: 12px; }
.sentiment .pill {
  display: inline-block; padding: 4px 12px; border-radius: 20px; font-weight: 700;
  background: #eef2f8; color: var(--brand);
}
.filters { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.field { display: flex; flex-direction: column; gap: 5px; }
.field label { font-size: 12px; color: var(--muted); font-weight: 600; }
.field input, .field select {
  padding: 7px 9px; border: 1px solid var(--line); border-radius: 7px;
  font-size: 13px; background: #fff; color: var(--ink);
}
.range { display: flex; align-items: center; gap: 6px; }
.range input { width: 100%; }
.checks { display: flex; flex-wrap: wrap; gap: 8px 14px; }
.checks label { display: flex; align-items: center; gap: 4px; font-size: 13px; color: var(--ink); font-weight: 400; }
.actions { margin-top: 16px; display: flex; align-items: center; gap: 12px; }
.btn {
  border: 1px solid var(--line); background: #fff; color: var(--ink);
  padding: 9px 16px; border-radius: 8px; cursor: pointer; font-size: 14px;
}
.btn.primary { background: var(--brand); border-color: var(--brand); color: #fff; font-weight: 600; }
.btn.primary:hover { background: #2257e0; }
.btn.accent { background: #ff7a18; border-color: #ff7a18; color: #fff; font-weight: 600; }
.btn.accent:hover { background: #ef6a08; }
.btn.ghost { background: #f3f6fb; }
.btn:disabled { opacity: .6; cursor: default; }
.table-wrap { overflow-x: auto; margin-top: 8px; }
.up { color: var(--red); }
.down { color: var(--green); }
.reason { color: var(--muted); font-size: 12px; max-width: 320px; }
.footer { text-align: center; color: var(--muted); font-size: 12px; padding: 20px; }
@media (max-width: 860px) {
  .grid-2, .filters { grid-template-columns: 1fr; }
}