:root {
  --bg: #f5f6f8;
  --card: #fff;
  --line: #e7e8ec;
  --ink: #1d2129;
  --ink-2: #5c6370;
  --ink-3: #8d95a3;
  --accent: #2f6fed;
  --good: #0f9d58;
  --warn: #d97706;
  --bad: #d64541;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 13px/1.6 -apple-system, "Segoe UI", "Microsoft YaHei", "PingFang SC", sans-serif;
  -webkit-font-smoothing: antialiased;
}

/* 顶栏 */
.bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 48px;
  padding: 0 18px;
  background: #fff;
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 10;
}
.brand { display: flex; align-items: center; gap: 8px; }
.brand strong { font-weight: 600; font-size: 14px; }
.brand .sub { color: var(--ink-3); font-size: 12px; }
.dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: #c9ccd4; transition: background .2s;
}
.dot.on { background: var(--good); }
.dot.off { background: var(--bad); }
.bar-right { display: flex; align-items: center; gap: 14px; }
.muted { color: var(--ink-3); font-size: 12px; }
.link {
  border: 0; background: none; color: var(--ink-3);
  font-size: 12px; cursor: pointer; padding: 2px 4px;
}
.link:hover { color: var(--accent); }

main { max-width: 1180px; margin: 18px auto 60px; padding: 0 18px; }

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 16px 18px;
  margin-bottom: 14px;
}

/* 口令 */
.key-card label { display: block; color: var(--ink-2); margin-bottom: 8px; }
.row { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
input[type="text"], input[type="password"] {
  height: 32px; padding: 0 10px;
  border: 1px solid var(--line); border-radius: 6px;
  background: #fff; color: var(--ink); font: inherit; outline: none;
  min-width: 220px;
}
input:focus { border-color: #b6c8f0; box-shadow: 0 0 0 2px rgba(47,111,237,.08); }
button {
  height: 32px; padding: 0 14px; border-radius: 6px;
  border: 1px solid var(--line); background: #fafbfc; color: var(--ink);
  font: inherit; cursor: pointer;
}
button:hover { border-color: #d3d7de; }
button.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
button.primary:hover { background: #2861d8; }
.hint { color: var(--ink-3); font-size: 12px; margin: 8px 0 0; }
.hint.bad { color: var(--bad); }

/* 总览 */
.stats { display: flex; flex-wrap: wrap; gap: 28px; margin-bottom: 14px; }
.stat .k { color: var(--ink-3); font-size: 12px; }
.stat .v { font-size: 22px; font-weight: 600; letter-spacing: .2px; }
.stat .v small { font-size: 12px; font-weight: 400; color: var(--ink-3); margin-left: 3px; }

.filters { border-top: 1px solid var(--line); padding-top: 12px; }
.seg { display: inline-flex; border: 1px solid var(--line); border-radius: 6px; overflow: hidden; }
.seg button {
  border: 0; border-radius: 0; background: #fff; height: 30px;
  padding: 0 12px; color: var(--ink-2); font-size: 12px;
}
.seg button + button { border-left: 1px solid var(--line); }
.seg button.on { background: #eef3ff; color: var(--accent); font-weight: 600; }

/* 交叉表 */
.card-head h2 { font-size: 15px; font-weight: 600; margin: 0 0 4px; }
.cap { color: var(--ink-3); font-size: 12px; margin: 0 0 12px; }
.table-wrap { overflow-x: auto; }
table { border-collapse: collapse; width: 100%; min-width: 720px; }
th, td {
  border-bottom: 1px solid var(--line);
  padding: 8px 10px;
  text-align: center;
  white-space: nowrap;
  font-variant-numeric: tabular-nums;
}
th:first-child, td:first-child { text-align: left; }
thead th {
  background: #fafbfc;
  color: var(--ink-2);
  font-weight: 500;
  font-size: 12px;
  position: sticky; top: 0;
}
tbody td.band { color: var(--ink); font-weight: 500; }
tbody tr.rowsum { background: #fafbfc; }

.cell-rate { font-weight: 600; }
.cell-n { display: block; color: var(--ink-3); font-size: 11px; font-weight: 400; }
.cell-null { color: #c9ccd4; }

.r-hi { color: var(--good); }
.r-mid { color: var(--warn); }
.r-low { color: var(--bad); }

.foot { color: var(--ink-3); font-size: 12px; margin: 12px 0 0; line-height: 1.7; }
.foot b { color: var(--ink-2); }
.empty { color: var(--ink-3); margin: 6px 0; }

@media (max-width: 720px) {
  .stats { gap: 18px; }
  main { padding: 0 12px; }
}