/* =========================================================
 *  style.css —— 精简 ERP 教学模拟平台
 * ========================================================= */
:root {
  --bg: #f4f6f9;
  --card: #ffffff;
  --border: #e6eaf0;
  --border-strong: #d5dbe4;
  --text: #1e293b;
  --muted: #64748b;
  --faint: #94a3b8;
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --primary-soft: #eff5ff;
  --ok: #16a34a;
  --ok-soft: #eefaf1;
  --warn: #d97706;
  --warn-soft: #fff8ec;
  --danger: #dc2626;
  --danger-soft: #fef2f2;
  --radius: 10px;
  --shadow: 0 1px 2px rgba(15, 23, 42, .04), 0 4px 12px rgba(15, 23, 42, .04);
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--bg);
  color: var(--text);
  font: 14px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", "PingFang SC", sans-serif;
  -webkit-font-smoothing: antialiased;
}
h1, h2, h3, h4 { margin: 0; font-weight: 600; }
a { color: var(--primary); }

/* ---------- 布局 ---------- */
.topbar {
  position: sticky; top: 0; z-index: 30;
  height: 56px; background: #fff; border-bottom: 1px solid var(--border);
  display: flex; align-items: center; gap: 18px; padding: 0 20px;
}
.topbar .logo { font-size: 15px; font-weight: 700; letter-spacing: .3px; white-space: nowrap; display: inline-flex; align-items: center; }
.topbar .logo span { color: var(--primary); }
.topbar .logo .logo-img { height: 32px; margin-right: 9px; padding: 4px 8px; border-radius: 6px; background: #dc2626; }
.topbar .grow { flex: 1; }
.chip {
  display: inline-flex; align-items: baseline; gap: 6px;
  background: var(--bg); border: 1px solid var(--border);
  border-radius: 999px; padding: 4px 12px; font-size: 13px; color: var(--muted);
  white-space: nowrap;
}
.chip b { color: var(--text); font-size: 14px; font-variant-numeric: tabular-nums; }
.chip.cash b { color: var(--ok); }
.chip.cash.low b { color: var(--danger); }

.layout { display: flex; align-items: flex-start; min-height: calc(100vh - 56px); }
.sidebar {
  width: 186px; flex: none; position: sticky; top: 56px;
  background: #fff; border-right: 1px solid var(--border);
  padding: 12px 10px; height: calc(100vh - 56px); overflow: auto;
}
.sidebar button {
  display: flex; align-items: center; gap: 9px; width: 100%;
  border: 0; background: transparent; color: var(--muted);
  padding: 9px 11px; margin-bottom: 2px; border-radius: 8px;
  font-size: 13.5px; cursor: pointer; text-align: left;
  font-family: inherit;
}
.sidebar button:hover { background: var(--bg); color: var(--text); }
.sidebar button.active { background: var(--primary-soft); color: var(--primary-dark); font-weight: 600; }
.sidebar button .ico { width: 18px; text-align: center; font-size: 15px; }
.sidebar .sep { height: 1px; background: var(--border); margin: 10px 6px; }

main { flex: 1; padding: 20px 24px 60px; min-width: 0; max-width: 1220px; }

/* ---------- 通用块 ---------- */
.page-head { display: flex; align-items: flex-end; justify-content: space-between; gap: 16px; margin-bottom: 16px; flex-wrap: wrap; }
.page-head h2 { font-size: 19px; }
.page-head .sub { color: var(--muted); font-size: 13px; margin-top: 3px; }

.card {
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 16px 18px; box-shadow: var(--shadow); margin-bottom: 16px;
}
.card > h3 { font-size: 15px; margin-bottom: 4px; display: flex; align-items: center; gap: 8px; }
.card > .hint { color: var(--muted); font-size: 12.5px; margin-bottom: 12px; }
.grid { display: grid; gap: 16px; }
.g2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.g3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.g4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.row { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }

/* ---------- 指标卡 ---------- */
.kpi {
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 13px 15px; box-shadow: var(--shadow);
}
.kpi .label { color: var(--muted); font-size: 12.5px; display: flex; align-items: center; gap: 5px; }
.kpi .value { font-size: 22px; font-weight: 700; margin-top: 4px; font-variant-numeric: tabular-nums; letter-spacing: -.3px; }
.kpi .delta { font-size: 12px; margin-top: 2px; color: var(--faint); }
.kpi .delta.up { color: var(--ok); } .kpi .delta.down { color: var(--danger); }
.kpi.ok .value { color: var(--ok); } .kpi.warn .value { color: var(--warn); } .kpi.danger .value { color: var(--danger); }

/* ---------- 表格 ---------- */
table { width: 100%; border-collapse: collapse; font-variant-numeric: tabular-nums; }
th, td { padding: 8px 10px; text-align: right; border-bottom: 1px solid var(--border); font-size: 13px; }
th:first-child, td:first-child { text-align: left; }
thead th { color: var(--muted); font-weight: 500; font-size: 12.5px; background: #fafbfc; }
tbody tr:hover { background: #fafbfd; }
tr.total td { font-weight: 700; border-top: 2px solid var(--border-strong); background: #fafbfc; }
tr.sub td { color: var(--muted); }
td .neg { color: var(--danger); }
td .pos { color: var(--ok); }
.tbl-wrap { overflow-x: auto; }

/* ---------- 表单 ---------- */
.field { margin-bottom: 14px; }
.field label { display: block; font-size: 13px; color: var(--muted); margin-bottom: 5px; }
.field .unit { color: var(--faint); font-size: 12px; }
input[type=number], input[type=text], select {
  width: 100%; border: 1px solid var(--border-strong); border-radius: 7px;
  padding: 8px 10px; font-size: 14px; font-family: inherit; color: var(--text);
  background: #fff; font-variant-numeric: tabular-nums;
}
input:focus, select:focus { outline: 2px solid var(--primary-soft); border-color: var(--primary); }
input[disabled] { background: #f5f7fa; color: var(--faint); }
input.err { border-color: var(--danger); background: var(--danger-soft); }

button.btn {
  border: 1px solid var(--border-strong); background: #fff; color: var(--text);
  padding: 8px 15px; border-radius: 7px; font-size: 13.5px; cursor: pointer;
  font-family: inherit; transition: .12s;
}
button.btn:hover { border-color: var(--faint); background: #fafbfc; }
button.btn.primary { background: var(--primary); border-color: var(--primary); color: #fff; font-weight: 600; }
button.btn.primary:hover { background: var(--primary-dark); }
button.btn.ghost { border-color: transparent; color: var(--muted); }
button.btn.ghost:hover { color: var(--text); background: var(--bg); }
button.btn.danger { color: var(--danger); border-color: #f2c7c7; }
button.btn:disabled { opacity: .5; cursor: not-allowed; }
button.btn.sm { padding: 5px 10px; font-size: 12.5px; }

/* ---------- 徽标 / 提示 ---------- */
.tag { display: inline-block; padding: 1px 8px; border-radius: 5px; font-size: 12px; font-weight: 500; }
.tag.ok { background: var(--ok-soft); color: var(--ok); }
.tag.warn { background: var(--warn-soft); color: var(--warn); }
.tag.danger { background: var(--danger-soft); color: var(--danger); }
.tag.info { background: var(--primary-soft); color: var(--primary-dark); }
.tag.gray { background: var(--bg); color: var(--muted); }

.callout { border-radius: 8px; padding: 11px 14px; font-size: 13px; margin-bottom: 12px; border: 1px solid; }
.callout.info { background: var(--primary-soft); border-color: #cfe0ff; color: #1e40af; }
.callout.warn { background: var(--warn-soft); border-color: #fae3b8; color: #92400e; }
.callout.danger { background: var(--danger-soft); border-color: #f8cdcd; color: #991b1b; }
.callout.ok { background: var(--ok-soft); border-color: #c3ead0; color: #166534; }

.tip { border: 1px solid var(--border); border-left: 3px solid var(--faint); border-radius: 8px; padding: 11px 14px; margin-bottom: 10px; background: #fff; }
.tip.danger { border-left-color: var(--danger); } .tip.warn { border-left-color: var(--warn); }
.tip.info { border-left-color: var(--primary); }  .tip.ok { border-left-color: var(--ok); }
.tip .t { font-weight: 600; font-size: 13.5px; margin-bottom: 3px; display: flex; gap: 7px; align-items: center; }
.tip .b { color: var(--muted); font-size: 13px; }
.tip .c { margin-top: 6px; font-size: 12px; color: var(--primary); }

/* ---------- 校验面板 ---------- */
.check { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 8px; margin: 10px 0; }
.check .item {
  border: 1px solid var(--border); border-radius: 8px; padding: 8px 11px; background: #fcfdfe; font-size: 12.5px;
}
.check .item .k { color: var(--muted); font-size: 12px; }
.check .item .v { font-weight: 600; font-variant-numeric: tabular-nums; margin-top: 1px; }
.check .item.bad { border-color: #f3c9c9; background: var(--danger-soft); }
.check .item.bad .v { color: var(--danger); }
.check .item.tight { border-color: #fae3b8; background: var(--warn-soft); }
.check .item.tight .v { color: var(--warn); }

.bar { height: 6px; border-radius: 3px; background: #eef1f5; overflow: hidden; margin-top: 5px; }
.bar > i { display: block; height: 100%; background: var(--primary); border-radius: 3px; }
.bar > i.over { background: var(--danger); }
.bar > i.warn { background: var(--warn); }
.bar > i.ok { background: var(--ok); }

/* ---------- 弹窗 ---------- */
.modal-mask {
  position: fixed; inset: 0; background: rgba(15, 23, 42, .45); z-index: 50;
  display: flex; align-items: flex-start; justify-content: center; padding: 40px 16px; overflow: auto;
}
.modal {
  background: #fff; border-radius: 12px; max-width: 720px; width: 100%;
  box-shadow: 0 18px 50px rgba(15, 23, 42, .22); overflow: hidden;
}
.modal .hd { padding: 16px 20px; border-bottom: 1px solid var(--border); display: flex; align-items: center; justify-content: space-between; }
.modal .hd h3 { font-size: 16px; }
.modal .bd { padding: 18px 20px; max-height: 66vh; overflow: auto; }
.modal .ft { padding: 13px 20px; border-top: 1px solid var(--border); display: flex; justify-content: flex-end; gap: 10px; background: #fafbfc; }
.hidden { display: none !important; }

/* ---------- 知识卡 ---------- */
.kc { border: 1px solid var(--border); border-radius: 9px; padding: 13px 15px; background: #fff; height: 100%; }
.kc h4 { font-size: 14px; margin-bottom: 6px; color: var(--primary-dark); }
.kc p { margin: 0 0 7px; font-size: 13px; color: var(--muted); }
.kc .formula { background: var(--bg); border-radius: 6px; padding: 7px 10px; font-size: 12.5px; color: var(--text); font-family: ui-monospace, Consolas, monospace; }
.kc .why { font-size: 12.5px; color: var(--muted); border-top: 1px dashed var(--border); padding-top: 7px; margin-top: 8px; }

/* ---------- 其它 ---------- */
.empty { text-align: center; padding: 46px 16px; color: var(--faint); }
.empty .big { font-size: 40px; margin-bottom: 10px; }
.mono { font-variant-numeric: tabular-nums; }
.small { font-size: 12.5px; color: var(--muted); }
.right { text-align: right; }
canvas.chart { width: 100%; height: 240px; display: block; }
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.legend-dot { display: inline-block; width: 9px; height: 9px; border-radius: 2px; margin-right: 5px; }

@media (max-width: 1024px) {
  .g4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .g3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 820px) {
  .layout { flex-direction: column; }
  .sidebar { width: 100%; height: auto; position: static; display: flex; overflow-x: auto; border-right: 0; border-bottom: 1px solid var(--border); }
  .sidebar button { width: auto; white-space: nowrap; }
  .sidebar .sep { display: none; }
  main { padding: 16px; }
  .g2, .g3, .g4, .split { grid-template-columns: 1fr; }
  .topbar { gap: 10px; padding: 0 12px; }
  .topbar .chip.hide-sm { display: none; }
  .topbar .logo .logo-img { height: 25px; padding: 3px 6px; margin-right: 7px; }
}