:root {
  --bg: #f6f7f9;
  --card: #ffffff;
  --fg: #16181d;
  --muted: #6b7280;
  --line: #e5e7eb;
  --brand: #2563eb;
  --brand-dark: #1d4ed8;
  --ok: #16a34a;
  --ok-bg: #e8f7ee;
  --wait: #d97706;
  --wait-bg: #fef3e2;
  --err: #dc2626;
  --err-bg: #fdeaea;
  --radius: 10px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 15px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
        "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--brand); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ---------- 布局 ---------- */
.topbar {
  background: #fff;
  border-bottom: 1px solid var(--line);
  position: sticky; top: 0; z-index: 20;
}
.topbar-inner {
  max-width: 1100px; margin: 0 auto; padding: 0 20px;
  display: flex; align-items: center; gap: 24px; height: 58px;
}
.brand { font-weight: 700; font-size: 16px; color: var(--fg); }
.brand:hover { text-decoration: none; }
.nav { display: flex; gap: 4px; flex: 1; }
.nav a {
  padding: 6px 12px; border-radius: 6px; color: var(--muted);
  font-size: 14px; font-weight: 500;
}
.nav a:hover { background: var(--bg); text-decoration: none; color: var(--fg); }
.nav a.active { background: #eef2ff; color: var(--brand); }

.wrap { max-width: 1100px; margin: 0 auto; padding: 26px 20px 60px; }
.wrap-narrow { max-width: 460px; }

h1 { font-size: 21px; margin: 0 0 4px; }
h2 { font-size: 17px; margin: 28px 0 12px; }
h3 { font-size: 15px; margin: 20px 0 8px; }
.sub { color: var(--muted); font-size: 13px; margin-bottom: 22px; }

/* ---------- 卡片 ---------- */
.card {
  background: var(--card); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 20px; margin-bottom: 18px;
}
.card-tight { padding: 16px 18px; }

/* ---------- 统计 ---------- */
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 14px; }
.stat { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 16px 18px; }
.stat .label { color: var(--muted); font-size: 12px; font-weight: 500; }
.stat .value { font-size: 24px; font-weight: 700; margin-top: 6px; letter-spacing: -0.5px; }
.stat .value small { font-size: 13px; font-weight: 500; color: var(--muted); }

/* ---------- 表格 ---------- */
table { width: 100%; border-collapse: collapse; background: #fff; }
th, td { text-align: left; padding: 11px 14px; border-bottom: 1px solid var(--line); font-size: 14px; }
th { background: #fafbfc; color: var(--muted); font-size: 12px; font-weight: 600; }
tr:last-child td { border-bottom: none; }
.table-card { padding: 0; overflow: hidden; }
.table-scroll { overflow-x: auto; }
td.num { text-align: right; font-variant-numeric: tabular-nums; }
td.mono { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 13px; }

/* ---------- 徽标 ---------- */
.badge {
  display: inline-block; padding: 2px 9px; border-radius: 20px;
  font-size: 12px; font-weight: 600; white-space: nowrap;
}
.badge.ok { background: var(--ok-bg); color: var(--ok); }
.badge.wait { background: var(--wait-bg); color: var(--wait); }
.badge.refund { background: #eef2ff; color: var(--brand); }
.badge.muted { background: #f1f2f4; color: var(--muted); }
.badge.err { background: var(--err-bg); color: var(--err); }

/* ---------- 表单 ---------- */
label { display: block; font-size: 13px; font-weight: 600; margin-bottom: 5px; }
.hint { color: var(--muted); font-size: 12px; font-weight: 400; margin-top: 4px; line-height: 1.5; }
input[type=text], input[type=password], input[type=number], select, textarea {
  width: 100%; padding: 9px 11px; border: 1px solid var(--line);
  border-radius: 7px; font-size: 14px; font-family: inherit; background: #fff;
  transition: border-color .15s, box-shadow .15s;
}
input:focus, select:focus, textarea:focus {
  outline: none; border-color: var(--brand); box-shadow: 0 0 0 3px rgba(37,99,235,.12);
}
input[type=file] { font-size: 13px; padding: 6px 0; }
.field { margin-bottom: 16px; }
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
@media (max-width: 640px) { .grid2 { grid-template-columns: 1fr; } }

.check { display: flex; align-items: flex-start; gap: 9px; margin-bottom: 14px; }
.check input { margin-top: 3px; flex-shrink: 0; width: 16px; height: 16px; }
.check label { margin: 0; font-weight: 600; }
.check .hint { margin-top: 2px; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-block; padding: 9px 18px; border-radius: 7px; border: 1px solid transparent;
  font-size: 14px; font-weight: 600; cursor: pointer; font-family: inherit;
  background: var(--brand); color: #fff; transition: background .15s;
}
.btn:hover { background: var(--brand-dark); text-decoration: none; }
.btn:disabled { opacity: .55; cursor: not-allowed; }
.btn.ghost { background: #fff; color: var(--fg); border-color: var(--line); }
.btn.ghost:hover { background: var(--bg); }
.btn.danger { background: var(--err); }
.btn.danger:hover { background: #b91c1c; }
.btn.sm { padding: 5px 12px; font-size: 13px; }
.btn-row { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }

/* ---------- 提示条 ---------- */
.alert { padding: 11px 14px; border-radius: 8px; font-size: 13px; margin-bottom: 16px; line-height: 1.6; }
.alert.ok { background: var(--ok-bg); color: #14532d; }
.alert.err { background: var(--err-bg); color: #7f1d1d; }
.alert.warn { background: var(--wait-bg); color: #78350f; }
.alert.info { background: #eff6ff; color: #1e3a8a; }
.alert ul { margin: 6px 0 0; padding-left: 20px; }

code, .code {
  background: #f1f2f4; padding: 1px 6px; border-radius: 4px;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 13px;
}
pre.code { padding: 12px 14px; overflow-x: auto; line-height: 1.5; display: block; }

/* ---------- 收银台 ---------- */
.cashier {
  max-width: 400px; margin: 0 auto; padding: 32px 20px 60px; text-align: center;
}
.cashier .amount { font-size: 36px; font-weight: 700; letter-spacing: -1px; margin: 4px 0 2px; }
.cashier .subject { color: var(--muted); font-size: 14px; margin-bottom: 24px; }
.qr-box {
  background: #fff; border: 1px solid var(--line); border-radius: 14px;
  padding: 18px; display: inline-block; margin-bottom: 12px;
}
.qr-box img, .qr-box canvas { display: block; width: 210px; height: 210px; }
.qr-fallback { word-break: break-all; font-size: 12px; color: var(--muted); padding: 10px; }
.cashier .pay-tip { color: var(--muted); font-size: 13px; margin-bottom: 22px; }
.paid-splash { padding: 40px 0; }
.paid-splash .tick {
  width: 64px; height: 64px; border-radius: 50%; background: var(--ok-bg);
  color: var(--ok); font-size: 34px; line-height: 64px; margin: 0 auto 16px;
}
.spinner {
  width: 34px; height: 34px; border: 3px solid var(--line); border-top-color: var(--brand);
  border-radius: 50%; margin: 0 auto 12px; animation: spin .8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.order-no { font-family: ui-monospace, Menlo, monospace; font-size: 12px; color: var(--muted); }
.kv { display: grid; grid-template-columns: 120px 1fr; gap: 8px 16px; font-size: 14px; }
.kv dt { color: var(--muted); }
.kv dd { margin: 0; word-break: break-all; }

.muted { color: var(--muted); }
.small { font-size: 13px; }
.center { text-align: center; }
.mt0 { margin-top: 0; }
.mb0 { margin-bottom: 0; }