:root {
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --bg: #f1f5f9;
  --card: #ffffff;
  --text: #0f172a;
  --muted: #64748b;
  --border: #e2e8f0;
  --danger: #dc2626;
  --ok: #16a34a;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  padding-bottom: 40px;
}

.bk-wrap { max-width: 560px; margin: 0 auto; padding: 16px; }

.bk-header {
  text-align: center;
  padding: 28px 0 12px;
}
.bk-header h1 { font-size: 24px; font-weight: 700; }
.bk-sub { color: var(--muted); margin-top: 4px; font-size: 14px; }

.card {
  background: var(--card);
  border-radius: 12px;
  padding: 14px 16px;
  border: 1px solid var(--border);
}

.bk-location { display: flex; gap: 12px; align-items: flex-start; margin-bottom: 20px; }
.bk-loc-icon { font-size: 24px; line-height: 1.2; }
.bk-loc-text strong { font-size: 15px; }
.bk-loc-note { color: var(--muted); font-size: 13px; margin-top: 2px; }

.bk-section {
  background: var(--card);
  border-radius: 12px;
  padding: 16px;
  border: 1px solid var(--border);
  margin-bottom: 20px;
}
.bk-section-title { font-weight: 700; font-size: 16px; margin-bottom: 12px; }

.bk-date-row { margin-bottom: 12px; }
.bk-date-row label { display: block; font-size: 13px; color: var(--muted); margin-bottom: 4px; }
.bk-date-row input {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 15px;
}

.bk-slots { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.bk-slot {
  padding: 10px;
  border: 1px solid var(--border);
  border-radius: 8px;
  text-align: center;
  cursor: pointer;
  transition: all .15s;
  font-size: 14px;
}
.bk-slot:hover { border-color: var(--primary); }
.bk-slot.selected { background: var(--primary); color: #fff; border-color: var(--primary); }
.bk-slot.disabled { background: #f8fafc; color: #cbd5e1; cursor: not-allowed; text-decoration: line-through; }
.bk-slot .slot-sub { font-size: 11px; opacity: .7; }
.bk-empty { grid-column: 1 / -1; text-align: center; color: var(--muted); padding: 16px; }

.bk-legend { color: var(--muted); font-size: 12px; margin-top: 10px; }

.bk-field { margin-bottom: 12px; }
.bk-field label { display: block; font-size: 13px; color: var(--muted); margin-bottom: 4px; }
.bk-field .req { color: var(--danger); }
.bk-field input, .bk-field textarea {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 15px;
  font-family: inherit;
}
.bk-field input:focus, .bk-field textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, .12);
}

.bk-submit {
  width: 100%;
  padding: 13px;
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: 10px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  margin-top: 4px;
}
.bk-submit:disabled { background: #93c5fd; cursor: not-allowed; }
.bk-submit:hover:not(:disabled) { background: var(--primary-dark); }

.bk-result-card { text-align: center; padding: 20px 16px; }
.bk-success-icon {
  width: 56px; height: 56px; border-radius: 50%;
  background: #dcfce7; color: var(--ok);
  font-size: 30px; line-height: 56px;
  margin: 0 auto 12px;
}
.bk-result-card h2 { font-size: 20px; margin-bottom: 4px; }
.bk-result-note { color: var(--muted); font-size: 14px; margin-bottom: 16px; }

.bk-voucher {
  background: #f8fafc;
  border: 1px dashed var(--border);
  border-radius: 10px;
  padding: 12px 14px;
  text-align: left;
  margin-bottom: 12px;
}
.bk-voucher-row { display: flex; justify-content: space-between; padding: 5px 0; border-bottom: 1px solid #eef2f7; font-size: 14px; }
.bk-voucher-row:last-child { border-bottom: none; }
.bk-voucher-row span { color: var(--muted); }
.bk-voucher-row strong { text-align: right; }
.bk-save-tip { color: var(--muted); font-size: 13px; margin-bottom: 14px; }

.bk-btn-ghost {
  padding: 10px 18px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 8px;
  cursor: pointer;
  font-size: 14px;
  color: var(--text);
}
.bk-btn-ghost:hover { border-color: var(--primary); color: var(--primary); }

.bk-query-row { display: flex; gap: 8px; }
.bk-query-row input { flex: 1; padding: 10px 12px; border: 1px solid var(--border); border-radius: 8px; font-size: 14px; }
.bk-query-result { margin-top: 12px; }
.bk-qcard { border: 1px solid var(--border); border-radius: 10px; padding: 12px 14px; background: #f8fafc; }
.bk-qcard .bk-voucher-row { font-size: 13px; }
.bk-cancel-btn {
  margin-top: 10px;
  padding: 9px 16px;
  background: #fff;
  border: 1px solid var(--danger);
  color: var(--danger);
  border-radius: 8px;
  cursor: pointer;
  font-size: 14px;
}
.bk-cancel-btn:hover { background: #fef2f2; }

.bk-footer { text-align: center; color: #94a3b8; font-size: 12px; margin-top: 24px; }

.hidden { display: none; }

.bk-toast {
  position: fixed;
  top: 16px; left: 50%;
  transform: translateX(-50%);
  background: #0f172a;
  color: #fff;
  padding: 10px 18px;
  border-radius: 8px;
  font-size: 14px;
  z-index: 999;
  max-width: 90%;
  text-align: center;
}
.bk-toast.err { background: var(--danger); }
.bk-toast.ok { background: var(--ok); }