:root {
  /* 科技感深蓝 + 青色高光 */
  --bg: #0a1422;
  --bg-deep: #060d18;
  --panel: #0f1c2e;
  --panel-2: #142540;
  --panel-3: #1a2e4c;
  --line: #1e3a5f;
  --line-bright: #2a5080;
  --fg: #e4f0ff;
  --dim: #6f90b5;
  --cyan: #00d9ff;
  --cyan-dim: #0a7a92;
  --cyan-glow: rgba(0, 217, 255, .6);
  --accent: #00d9ff;
  --ok: #00e87a;
  --warn: #ffb800;
  --danger: #ff4d4f;

  /* 三栏宽度 */
  --col-left: 280px;
  --col-right: 380px;
  --gap: 10px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  background: var(--bg-deep);
  color: var(--fg);
  font: 13px/1.45 "Microsoft YaHei", "Segoe UI", -apple-system, sans-serif;
  height: 100vh;
  overflow: hidden;
}
body {
  display: flex; flex-direction: column;
  background:
    radial-gradient(1200px 600px at 20% 0%, rgba(0,217,255,.08), transparent 60%),
    radial-gradient(1200px 600px at 80% 0%, rgba(0,217,255,.05), transparent 60%),
    var(--bg-deep);
}

/* ---------- 顶栏 ---------- */
.topbar {
  display: flex; align-items: center; justify-content: space-between;
  gap: 16px; padding: 12px 20px;
  background: linear-gradient(180deg, #0f2240, #0a1828);
  border-bottom: 1px solid var(--cyan-dim);
  box-shadow: 0 0 20px rgba(0,217,255,.15);
  flex-shrink: 0;
}
.brand { display: flex; align-items: center; gap: 12px; }
.logo {
  font-size: 26px; color: var(--cyan); line-height: 1;
  text-shadow: 0 0 20px var(--cyan-glow);
}
.topbar h1 { font-size: 18px; margin: 0; letter-spacing: 3px;
  color: var(--cyan); text-shadow: 0 0 8px rgba(0,217,255,.4); }
.topbar .sub { margin: 3px 0 0; font-size: 11px; color: var(--dim); letter-spacing: 1px; }
.topbar-right { display: flex; align-items: center; gap: 12px; }
.pill {
  padding: 5px 12px; border-radius: 2px; font-size: 11px; letter-spacing: 1px;
  border: 1px solid var(--line-bright); background: rgba(0,217,255,.06);
  color: var(--dim); white-space: nowrap;
}
.pill-on { color: var(--ok); border-color: rgba(0,232,122,.5); background: rgba(0,232,122,.08); }
.pill-off { color: var(--danger); border-color: rgba(255,77,79,.5); background: rgba(255,77,79,.08); }
.pill-clock { color: var(--cyan); border-color: var(--cyan-dim); font-variant-numeric: tabular-nums; }

/* ---------- Tab ---------- */
.tabs { display: flex; gap: 0; padding: 0 20px; flex-shrink: 0; }
.tab {
  padding: 9px 22px; cursor: pointer; font-size: 13px; letter-spacing: 2px;
  border: 1px solid var(--cyan-dim); border-bottom: none;
  background: rgba(0,217,255,.03); color: var(--dim);
  position: relative; margin-right: 4px;
  clip-path: polygon(10px 0, 100% 0, 100% 100%, 0 100%, 0 10px);
}
.tab:hover { color: var(--fg); }
.tab.active {
  background: linear-gradient(180deg, rgba(0,217,255,.18), rgba(0,217,255,.04));
  color: var(--cyan); font-weight: 700;
  box-shadow: 0 -2px 10px rgba(0,217,255,.3);
  text-shadow: 0 0 6px rgba(0,217,255,.5);
}
.tab .t-dot { display: inline-block; width: 8px; height: 8px; border-radius: 50%;
  background: var(--dim); margin-right: 8px; vertical-align: middle; }
.tab .t-dot.on { background: var(--ok); box-shadow: 0 0 8px var(--ok); }
.tab .t-dot.off { background: var(--danger); box-shadow: 0 0 8px var(--danger); }

/* ---------- 主三栏 ---------- */
.dashboard {
  flex: 1; min-height: 0;
  display: grid;
  grid-template-columns: var(--col-left) 1fr var(--col-right);
  gap: var(--gap);
  padding: var(--gap) 20px 12px;
  overflow: hidden;
}

.col {
  background: linear-gradient(180deg, rgba(15,28,46,.95), rgba(10,20,34,.95));
  border: 1px solid var(--line);
  border-radius: 4px;
  overflow-y: auto;
  display: flex; flex-direction: column;
  box-shadow: inset 0 0 30px rgba(0,217,255,.03);
}
.col::-webkit-scrollbar { width: 5px; }
.col::-webkit-scrollbar-thumb { background: var(--line-bright); border-radius: 2px; }
.col::-webkit-scrollbar-track { background: transparent; }

/* ---------- 左栏大卡 ---------- */
.col-left { padding: 0; }
.big-card {
  margin: 10px; padding: 14px 16px;
  background: linear-gradient(135deg, rgba(0,217,255,.08), rgba(0,217,255,.01));
  border: 1px solid var(--cyan-dim);
  border-radius: 4px;
  position: relative; overflow: hidden;
}
.big-card::before {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 1px;
  background: linear-gradient(90deg, transparent, var(--cyan), transparent);
}
.big-card .bc-head {
  display: flex; align-items: center; gap: 12px;
  margin-bottom: 10px;
}
.big-card .bc-icon {
  width: 40px; height: 40px; border-radius: 50%;
  background: rgba(0,217,255,.12); border: 1px solid var(--cyan);
  display: flex; align-items: center; justify-content: center;
  font-size: 20px; color: var(--cyan);
  box-shadow: 0 0 12px rgba(0,217,255,.3), inset 0 0 8px rgba(0,217,255,.1);
  flex-shrink: 0;
}
.big-card .bc-title { font-size: 13px; font-weight: 700; color: var(--cyan); letter-spacing: 1px; }
.big-card .bc-sub { font-size: 10px; color: var(--dim); margin-top: 2px; }
.big-card .bc-val {
  font-size: 34px; font-weight: 800; line-height: 1;
  font-variant-numeric: tabular-nums; color: var(--fg);
  text-shadow: 0 0 10px rgba(255,255,255,.15);
}
.big-card .bc-val .u { font-size: 14px; font-weight: 400; color: var(--dim); margin-left: 6px; }
.big-card .bc-val.warn { color: var(--warn); text-shadow: 0 0 10px rgba(255,184,0,.3); }
.big-card .bc-val.danger { color: var(--danger); text-shadow: 0 0 10px rgba(255,77,79,.3); }
.big-card .bc-val.ok { color: var(--ok); text-shadow: 0 0 10px rgba(0,232,122,.3); }
.big-card .bc-foot {
  margin-top: 8px; font-size: 10px; color: var(--dim); line-height: 1.6;
  padding-top: 8px; border-top: 1px dashed var(--line);
}
.big-card .bc-foot .foot-row {
  display: flex; justify-content: space-between; padding: 2px 0;
}
.big-card .bc-foot .foot-k { color: var(--dim); }
.big-card .bc-foot .foot-v { color: var(--cyan); font-variant-numeric: tabular-nums; }
.big-card .bc-foot .foot-v.dim { color: var(--dim); }

/* ---------- 中栏视频 ---------- */
.col-center { padding: 10px; }
.cam-grid {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 8px; flex: 1; min-height: 0;
  align-content: stretch;
}
.cam {
  background: #020711; border: 1px solid var(--cyan-dim); border-radius: 2px;
  overflow: hidden; display: flex; flex-direction: column;
  min-height: 0;
  position: relative;
}
.cam::before {
  content: ""; position: absolute; top: 0; left: 0; width: 8px; height: 8px;
  border-top: 1px solid var(--cyan); border-left: 1px solid var(--cyan);
  pointer-events: none;
}
.cam::after {
  content: ""; position: absolute; bottom: 0; right: 0; width: 8px; height: 8px;
  border-bottom: 1px solid var(--cyan); border-right: 1px solid var(--cyan);
  pointer-events: none;
}
.cam-head {
  display: flex; align-items: center; gap: 6px; padding: 5px 10px;
  background: linear-gradient(90deg, rgba(0,217,255,.15), rgba(0,217,255,.02));
  border-bottom: 1px solid var(--cyan-dim);
  flex-shrink: 0;
}
.cam-head .cname {
  font-size: 12px; color: var(--cyan); letter-spacing: 1px; font-weight: 700;
}
.cam-head .cch { font-size: 9px; color: var(--dim); margin-left: auto;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap; max-width: 120px; }
.cam-body { position: relative; flex: 1; min-height: 0; background: #000; }
.cam-body iframe, .cam-body video { position: absolute; inset: 0; width: 100%;
  height: 100%; border: 0; background: #000; object-fit: contain; }
.cam-loading {
  position: absolute; left: 0; right: 0; bottom: 0; padding: 4px 8px;
  font-size: 10px; color: var(--dim); text-align: center;
  background: linear-gradient(180deg, rgba(0,0,0,0), rgba(0,0,0,.7));
}
.cam-ph {
  position: absolute; inset: 0; display: flex; flex-direction: column;
  align-items: center; justify-content: center; gap: 4px; padding: 8px;
  text-align: center;
  background:
    repeating-linear-gradient(45deg, #0a1220 0 8px, #08101a 8px 16px);
}
.cam-ph .ph-ico { font-size: 18px; color: var(--cyan-dim); }
.cam-ph .ph-msg { font-size: 10px; color: var(--dim); line-height: 1.5; }

/* ---------- 右栏 ---------- */
.col-right { padding: 10px; gap: 8px; overflow-y: auto; }
.r-section {
  border: 1px solid var(--line); border-radius: 4px;
  background: rgba(0,217,255,.02);
}
.r-sec-head {
  padding: 6px 12px; font-size: 12px; font-weight: 700; letter-spacing: 1px;
  color: var(--cyan);
  background: linear-gradient(90deg, rgba(0,217,255,.12), transparent);
  border-bottom: 1px solid var(--cyan-dim);
  display: flex; align-items: center; gap: 8px;
}
.r-sec-head::before {
  content: ""; width: 3px; height: 12px; background: var(--cyan);
  box-shadow: 0 0 6px var(--cyan-glow);
}
.r-sec-body { padding: 8px; }

/* 分类数据 */
.cat-grid { display: flex; flex-direction: column; gap: 6px; }
.cat {
  background: rgba(20,37,64,.6); border: 1px solid var(--line); border-radius: 2px;
  overflow: hidden;
}
.cat-head {
  padding: 6px 12px; font-size: 11px; font-weight: 700; letter-spacing: .5px;
  background: rgba(0,217,255,.06);
  border-bottom: 1px solid var(--line-bright); color: var(--cyan);
}
.cat-body { display: grid; grid-template-columns: 1fr 1fr; }
.cell {
  padding: 6px 10px; border-top: 1px solid rgba(30,58,95,.5);
  border-right: 1px solid rgba(30,58,95,.5);
}
.cell:nth-child(2n) { border-right: none; }
.cell-label { font-size: 10px; color: var(--dim); }
.cell-value { font-size: 14px; font-weight: 700; margin-top: 1px;
  font-variant-numeric: tabular-nums; }
.cell-value .u { font-size: 9px; color: var(--dim); font-weight: 400; margin-left: 2px; }
.cell.ok .cell-value { color: var(--ok); }
.cell.warn .cell-value { color: var(--warn); }
.cell.danger .cell-value { color: var(--danger); }
.cell.danger { background: rgba(255,77,79,.08); }
.cell.info .cell-value { color: #b9c7e2; }

/* 表格 */
.tbl { width: 100%; border-collapse: collapse; font-size: 11px; }
.tbl th {
  padding: 5px 8px; text-align: left; font-weight: 700;
  color: var(--cyan); letter-spacing: .5px;
  background: rgba(0,217,255,.08);
  border-bottom: 1px solid var(--cyan-dim);
}
.tbl td {
  padding: 5px 8px; border-bottom: 1px solid rgba(30,58,95,.5);
  color: var(--fg);
}
.tbl tr:hover td { background: rgba(0,217,255,.05); }
.tbl .ok { color: var(--ok); }
.tbl .warn { color: var(--warn); }
.tbl .danger { color: var(--danger); }
.tbl .empty td { text-align: center; color: var(--dim); padding: 12px; }
.tbl .btn {
  display: inline-block; padding: 2px 6px; border-radius: 2px;
  border: 1px solid var(--cyan-dim); color: var(--cyan); font-size: 10px;
  cursor: pointer; background: transparent;
}
.tbl .btn:hover { background: rgba(0,217,255,.1); }

/* 折线图占位 */
.chart-wrap { padding: 6px 10px; }
.chart-svg { width: 100%; height: 100px; display: block; }
.chart-legend {
  display: flex; gap: 12px; margin-top: 4px; font-size: 10px; color: var(--dim);
  justify-content: center;
}
.chart-legend span { display: inline-flex; align-items: center; gap: 4px; }
.chart-legend .dot { width: 8px; height: 3px; border-radius: 1px; }
.chart-list { margin-top: 6px; max-height: 90px; overflow-y: auto; }
.chart-item {
  display: flex; justify-content: space-between; padding: 3px 8px;
  border-bottom: 1px solid rgba(30,58,95,.4); font-size: 10px;
}
.chart-item:last-child { border-bottom: none; }

.empty { padding: 16px; text-align: center; color: var(--dim); font-size: 12px; }

/* ---------- 响应式 ---------- */
@media (max-width: 1400px) {
  :root { --col-left: 240px; --col-right: 320px; }
  .big-card .bc-val { font-size: 28px; }
}
@media (max-width: 1100px) {
  .dashboard { grid-template-columns: 220px 1fr; grid-template-rows: auto 1fr; }
  .col-right { grid-column: 1 / -1; grid-row: 1; max-height: 240px; }
  .col-left { grid-column: 1; grid-row: 2; }
  .col-center { grid-column: 2; grid-row: 2; }
}
@media (max-width: 820px) {
  .dashboard { grid-template-columns: 1fr; grid-template-rows: auto auto 1fr; }
  .col-right { grid-column: 1; grid-row: 1; max-height: 200px; }
  .col-left { grid-column: 1; grid-row: 2; }
  .col-center { grid-column: 1; grid-row: 3; }
  .cam-grid { grid-template-columns: repeat(2, 1fr); }
}