:root {
  --bg: #0b1220;
  --bg2: #111827;
  --card: #151c2c;
  --line: #243044;
  --text: #e5eef8;
  --muted: #8aa0b8;
  --pri: #14b8a6;
  --pri2: #0d9488;
  --warn: #f59e0b;
  --danger: #ef4444;
  --ok: #34d399;
  --radius: 14px;
  --shadow: 0 18px 50px rgba(0,0,0,.28);
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text); }
a { color: var(--pri); text-decoration: none; }
code, pre { background: #0a101b; padding: .2em .45em; border-radius: 6px; font-size: 13px; }
pre { padding: 14px; overflow: auto; }
.wrap { width: min(1100px, calc(100% - 32px)); margin: 0 auto; }
.muted { color: var(--muted); }
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  border: 1px solid var(--line); background: #1a2334; color: var(--text);
  border-radius: 10px; padding: 10px 16px; cursor: pointer; font-size: 14px;
}
.btn.primary { background: linear-gradient(180deg, var(--pri), var(--pri2)); border: 0; color: #042f2e; font-weight: 700; }
.btn.sm { padding: 6px 12px; font-size: 13px; }
.alert { background: rgba(239,68,68,.12); color: #fecaca; padding: 10px 12px; border-radius: 10px; margin: 12px 0; }
.ok { color: var(--ok); }

.top { border-bottom: 1px solid var(--line); background: rgba(11,18,32,.9); position: sticky; top: 0; }
.nav { display: flex; justify-content: space-between; align-items: center; height: 64px; gap: 16px; }
.nav > div { display: flex; gap: 16px; align-items: center; }
.hero { padding: 72px 0 48px; background: radial-gradient(800px 280px at 20% 0%, rgba(20,184,166,.18), transparent); }
.hero h1 { font-size: 42px; margin: 0 0 12px; }
.feats { display: grid; grid-template-columns: repeat(3,1fr); gap: 18px; padding: 28px 0 64px; }
.feat, .card, .stat, .auth-card, .install-box, .pay-card, .sys-card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 22px; box-shadow: var(--shadow);
}
.foot { text-align: center; color: var(--muted); padding: 28px; border-top: 1px solid var(--line); }

.auth-body, .install-body, .pay-body, .sys-body {
  min-height: 100vh; display: flex; align-items: center; justify-content: center; padding: 24px;
  background: radial-gradient(600px 240px at 50% 0, rgba(20,184,166,.16), transparent), var(--bg);
}
.auth-card, .install-box { width: min(460px, 100%); }
.pay-card { width: min(420px, 100%); text-align: center; }
.sys-card { width: min(560px, 100%); }
.pay-amount { font-size: 36px; margin: 8px 0; color: var(--pri); }
.qrbox { display: flex; justify-content: center; margin: 16px auto; background: #fff; padding: 12px; width: 244px; border-radius: 12px; }
.badge { display: inline-block; background: rgba(245,158,11,.16); color: var(--warn); padding: 4px 10px; border-radius: 999px; font-size: 12px; }

.form label { display: block; margin: 10px 0; color: var(--muted); font-size: 13px; }
.form input, .form select, .form textarea {
  width: 100%; margin-top: 6px; padding: 10px 12px; border-radius: 10px;
  border: 1px solid var(--line); background: #0d1524; color: var(--text);
}
.form textarea { min-height: 90px; }
.row { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; margin: 10px 0; }

.dash { display: grid; grid-template-columns: 220px 1fr; min-height: 100vh; }
.side { background: #0e1626; border-right: 1px solid var(--line); padding: 18px 12px; }
.side .brand { font-weight: 700; padding: 8px 12px 18px; }
.side nav { display: flex; flex-direction: column; gap: 4px; }
.side a { color: var(--muted); padding: 9px 12px; border-radius: 8px; }
.side a:hover, .side a.active { background: #182236; color: #fff; }
.main { padding: 28px; }
.main h1 { margin-top: 0; font-size: 22px; }
.stat-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 14px; margin: 16px 0 24px; }
.stat span { color: var(--muted); font-size: 13px; }
.stat b { display: block; font-size: 26px; margin-top: 6px; }
.stat small { color: var(--muted); }
.table { width: 100%; border-collapse: collapse; background: var(--card); border-radius: 12px; overflow: hidden; }
.table th, .table td { padding: 10px 12px; border-bottom: 1px solid var(--line); text-align: left; font-size: 13px; }
.table th { color: var(--muted); font-weight: 600; }
.toolbar { display: flex; gap: 8px; margin-bottom: 14px; }
.toolbar input, .toolbar select { padding: 8px 10px; border-radius: 8px; border: 1px solid var(--line); background: #0d1524; color: var(--text); }
.type-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.type-btn { padding: 16px; border-radius: 12px; border: 1px solid var(--line); background: #102033; color: #fff; cursor: pointer; }
.check-list { padding-left: 18px; line-height: 1.9; }
.check-list .ok { color: var(--ok); }
.check-list .no { color: var(--danger); }
.doc { padding: 32px 0 64px; line-height: 1.7; }
dialog { border: 1px solid var(--line); border-radius: 16px; background: var(--card); color: var(--text); padding: 0; }
dialog .form { padding: 20px; min-width: min(420px, 90vw); }

@media (max-width: 860px) {
  .dash { grid-template-columns: 1fr; }
  .side { position: sticky; top: 0; z-index: 5; display: flex; gap: 8px; overflow: auto; }
  .side nav { flex-direction: row; }
  .feats, .stat-grid { grid-template-columns: 1fr; }
  .hero h1 { font-size: 28px; }
}