:root {
  --bg: #f3f6fb;
  --surface: #ffffff;
  --surface-2: #f8fbff;
  --primary: #1e3a8a;
  --primary-2: #2563eb;
  --text: #17324d;
  --muted: #6b7a90;
  --line: #dbe5f1;
  --success: #1f9d6b;
  --warning: #d97706;
  --danger: #d14343;
  --shadow: 0 12px 30px rgba(30, 58, 138, 0.08);
  --radius: 18px;
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif; background: var(--bg); color: var(--text); }
a { color: var(--primary-2); text-decoration: none; }
.hidden { display:none !important; }
.topbar {
  display:flex; align-items:center; justify-content:space-between; padding: 18px 28px; background:#fff; border-bottom:1px solid var(--line); position:sticky; top:0; z-index:10;
}
.brand-wrap { display:flex; align-items:center; gap:14px; }
.brand-wrap img { width:46px; height:46px; border-radius:12px; box-shadow: var(--shadow); }
.brand-title { font-size: 30px; font-weight: 800; letter-spacing: .2px; color: var(--primary); }
.brand-subtitle { margin-top: 4px; font-size: 13px; color: var(--muted); }
.top-actions { display:flex; align-items:center; gap:12px; }
.badge { background:#eff6ff; color:var(--primary); border:1px solid #bfdbfe; padding:6px 10px; border-radius:999px; font-size:12px; }
.btn { border: none; border-radius: 12px; padding: 10px 16px; font-size: 14px; cursor: pointer; }
.btn.primary { background: linear-gradient(135deg, var(--primary), var(--primary-2)); color:#fff; }
.btn.ghost { background:#fff; color:var(--primary); border:1px solid var(--line); }
.btn.subtle { background:#eef4ff; color:var(--primary); }
.layout { max-width: 1480px; margin: 0 auto; padding: 24px; }
.login-shell { display:grid; grid-template-columns: 1.2fr .8fr; gap:24px; align-items:stretch; }
.card { background: var(--surface); border:1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); }
.hero-card { padding: 32px; position:relative; overflow:hidden; }
.hero-card::after { content:""; position:absolute; inset:auto -80px -80px auto; width:240px; height:240px; background: radial-gradient(circle at center, rgba(37,99,235,.18), transparent 70%); }
.hero-title { font-size: 44px; line-height:1.2; margin:0 0 14px; color:var(--primary); }
.hero-text { font-size: 17px; line-height:1.9; color: #31455d; max-width: 92%; }
.info-rows { display:grid; grid-template-columns: repeat(3, 1fr); gap:16px; margin-top: 22px; }
.mini-card { padding:18px; border-radius: 16px; border:1px solid var(--line); background:var(--surface-2); }
.mini-card h3 { margin:0 0 10px; color:var(--primary); }
.mini-card p { margin:0; line-height:1.7; color:#41566d; }
.stats-grid { display:grid; grid-template-columns: repeat(4, 1fr); gap:16px; margin-top:18px; }
.stat-card { padding:18px; border-radius:16px; background:#fff; border:1px solid var(--line); }
.stat-label { font-size:13px; color:var(--muted); margin-bottom:10px; }
.stat-value { font-size:28px; font-weight:800; color:var(--primary); }
.login-card { padding:28px; }
.login-card h2 { margin:0 0 18px; font-size: 30px; color:var(--primary); }
.form-grid { display:grid; gap:16px; }
label { display:grid; gap:8px; font-size:14px; color:#28425c; }
input, select, textarea { width:100%; border:1px solid #cdd9e5; border-radius: 12px; padding: 12px 14px; font-size:14px; background:#fff; }
textarea { resize: vertical; }
.helper { font-size:12px; color:var(--muted); }
.demo-box { margin-top:18px; padding:16px; background:#f8fbff; border:1px dashed #bfd3eb; border-radius:16px; line-height:1.8; }
.portal { display:grid; grid-template-columns: 260px 1fr; gap:24px; }
.sidebar { padding:20px; position:sticky; top:90px; align-self:start; }
.user-panel { padding:16px; border-radius:16px; background: linear-gradient(135deg, #eff6ff, #f8fbff); border:1px solid #dbe5f1; }
.user-role { font-size: 12px; color:var(--muted); }
.user-name { font-size: 22px; font-weight: 800; color:var(--primary); margin-top:6px; }
.nav-group { margin-top:18px; display:grid; gap:10px; }
.nav-btn { text-align:left; padding: 12px 14px; border-radius: 12px; background:#fff; border:1px solid var(--line); color:#1f3852; cursor:pointer; font-size:14px; }
.nav-btn.active { background:linear-gradient(135deg, var(--primary), var(--primary-2)); color:#fff; border-color:transparent; }
.content { display:grid; gap:18px; }
.page-banner { padding:22px 24px; display:flex; align-items:center; justify-content:space-between; gap:18px; }
.page-title { font-size:28px; font-weight:800; color:var(--primary); margin:0; }
.page-desc { margin:8px 0 0; color:#456079; line-height:1.8; }
.grid-2 { display:grid; grid-template-columns: 1fr 1fr; gap:18px; }
.grid-3 { display:grid; grid-template-columns: repeat(3, 1fr); gap:18px; }
.panel { padding:22px; }
.panel h3 { margin:0 0 14px; font-size:20px; color:var(--primary); }
.table-wrap { overflow:auto; }
table { width:100%; border-collapse: collapse; font-size:13px; }
th, td { padding: 10px 12px; border-bottom:1px solid #e8eef5; text-align:left; vertical-align:top; }
th { background:#f7faff; color:#28425c; }
.kpi-grid { display:grid; grid-template-columns: repeat(4,1fr); gap:16px; }
.kpi { padding:18px; border-radius:16px; background:#fff; border:1px solid var(--line); }
.kpi .label { font-size:13px; color:var(--muted); }
.kpi .value { font-size:26px; font-weight:800; color:var(--primary); margin-top:8px; }
.notice { padding:16px 18px; border-radius: 16px; background:#fff7ed; border:1px solid #fed7aa; color:#9a4d00; line-height:1.8; }
.dataset-card { padding:16px; border:1px solid var(--line); border-radius:16px; background:#fff; display:grid; gap:10px; }
.dataset-title { font-size:18px; font-weight:700; color:var(--primary); }
.dataset-meta { color:var(--muted); font-size:13px; }
.tag-row { display:flex; gap:8px; flex-wrap:wrap; }
.tag { padding:4px 10px; border-radius:999px; background:#eff6ff; color:var(--primary); font-size:12px; border:1px solid #c7dcff; }
.result-box { min-height: 220px; background:#fbfdff; border:1px solid var(--line); border-radius:16px; padding:16px; line-height:1.85; white-space:pre-wrap; }
.split { display:grid; grid-template-columns: 1.1fr .9fr; gap:18px; }
.footer { margin: 30px auto 28px; max-width:1480px; color:var(--muted); font-size:13px; padding:0 24px 20px; }
.qr-box { display:flex; gap:18px; align-items:center; padding:16px; border-radius:16px; background:#f8fbff; border:1px dashed #bfd3eb; }
#taskQr canvas, #taskQr img { background:#fff; padding:6px; border-radius:12px; box-shadow: var(--shadow); }
.timeline { display:grid; gap:12px; }
.timeline-item { padding:14px 16px; border-radius:14px; background:#fff; border:1px solid var(--line); }
.toolbar { display:flex; gap:10px; align-items:center; justify-content:space-between; margin-bottom:14px; flex-wrap:wrap; }
.chart-box { padding:10px; background:#fff; border:1px solid var(--line); border-radius:16px; min-height: 340px; }
.muted { color:var(--muted); }
.small { font-size:12px; }
.actions-inline { display:flex; gap:8px; flex-wrap:wrap; }
.status-ok { color: var(--success); }
.status-warn { color: var(--warning); }
.status-danger { color: var(--danger); }
@media (max-width: 1100px) {
  .login-shell, .portal, .grid-2, .split { grid-template-columns: 1fr; }
  .grid-3, .info-rows, .stats-grid, .kpi-grid { grid-template-columns: 1fr 1fr; }
  .sidebar { position:static; }
}
@media (max-width: 760px) {
  .layout { padding: 14px; }
  .topbar { padding: 14px; }
  .brand-title { font-size: 22px; }
  .hero-title { font-size: 30px; }
  .grid-3, .info-rows, .stats-grid, .kpi-grid { grid-template-columns: 1fr; }
}