* { margin: 0; padding: 0; box-sizing: border-box; }
body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  background: linear-gradient(135deg, #fafafa 0%, #f0f0f0 100%);
  min-height: 100vh;
  color: #1a1a1a;
  line-height: 1.6;
}
.container { max-width: 980px; margin: 0 auto; padding: 0 20px; }

/* 登录页 */
.auth-page { display: flex; align-items: center; justify-content: center; }
.auth-card {
  width: 100%; max-width: 360px; background: #fff; border-radius: 16px; padding: 36px 28px;
  box-shadow: 0 10px 40px rgba(0,0,0,.08); text-align: center; margin: 8vh 0;
}
.auth-icon {
  width: 56px; height: 56px; border-radius: 14px;
  background: linear-gradient(135deg, #e07a3d 0%, #d4652f 100%);
  display: flex; align-items: center; justify-content: center; font-size: 28px; margin: 0 auto 16px;
}
.auth-card h1 { font-size: 1.15rem; font-weight: 600; }
.auth-sub { font-size: .8rem; color: #71717a; margin: 6px 0 20px; }
.auth-card input {
  width: 100%; padding: 12px 14px; border: 1px solid #e4e4e7; border-radius: 8px;
  font-size: .9rem; margin-bottom: 12px; background: #fff;
}
.auth-card input:focus { outline: none; border-color: #e07a3d; box-shadow: 0 0 0 3px rgba(224,122,61,.1); }
.auth-btn {
  width: 100%; padding: 12px; background: linear-gradient(135deg, #e07a3d 0%, #d4652f 100%);
  color: #fff; border: none; border-radius: 8px; font-size: .95rem; font-weight: 600; cursor: pointer; margin-top: 4px;
}
.auth-btn:disabled { opacity: .6; cursor: default; }
.auth-error { color: #dc2626; font-size: .8rem; margin-bottom: 10px; min-height: 1em; }

/* 后台 */
.admin-header { background: #fff; border-bottom: 1px solid rgba(0,0,0,.05); position: sticky; top: 0; z-index: 50; }
.admin-header .container { display: flex; align-items: center; gap: 12px; padding-top: 14px; padding-bottom: 14px; }
.admin-header h1 { font-size: 1.1rem; }
.admin-header .spacer { flex: 1; }
.admin-header a, .admin-header button {
  font-size: .8rem; color: #71717a; text-decoration: none; border: 1px solid #e4e4e7;
  background: #fff; padding: 6px 12px; border-radius: 8px; cursor: pointer;
}
.admin-header a:hover, .admin-header button:hover { color: #1a1a1a; border-color: #d4d4d8; }
.admin-main { padding: 28px 0; }
.panel { background: #fff; border: 1px solid #e4e4e7; border-radius: 14px; padding: 20px; margin-bottom: 22px; }
.panel h2 { font-size: 1rem; margin-bottom: 16px; }
.form-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 12px; margin-bottom: 14px; }
.form-grid label { font-size: .75rem; color: #52525b; display: block; margin-bottom: 4px; }
.form-grid input, .form-grid select { width: 100%; padding: 9px 11px; border: 1px solid #e4e4e7; border-radius: 8px; font-size: .85rem; background: #fff; }
.btn-primary { background: linear-gradient(135deg, #e07a3d 0%, #d4652f 100%); color: #fff; border: none; padding: 10px 18px; border-radius: 8px; font-weight: 600; cursor: pointer; font-size: .85rem; }
.btn-primary:disabled { opacity: .6; cursor: default; }
.btn-sm { padding: 5px 10px; font-size: .75rem; border: 1px solid #e4e4e7; background: #fff; border-radius: 7px; cursor: pointer; margin-right: 6px; }
.btn-sm.danger { color: #dc2626; border-color: #fecaca; }
.btn-sm.warn { color: #b45309; border-color: #fde68a; }
table { width: 100%; border-collapse: collapse; font-size: .82rem; }
th, td { text-align: left; padding: 9px 10px; border-bottom: 1px solid #f0f0f0; vertical-align: middle; }
th { color: #71717a; font-weight: 600; background: #fafafa; }
.tag { display: inline-block; padding: 2px 8px; border-radius: 999px; font-size: .7rem; }
.tag.active { background: #dcfce7; color: #16a34a; }
.tag.disabled { background: #fee2e2; color: #dc2626; }
.tag.admin { background: #ede9fe; color: #7c3aed; }
.tag.user { background: #e0f2fe; color: #0369a1; }
.stat-cards { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 16px; }
.stat-card { flex: 1; min-width: 140px; background: #fff7ed; border: 1px solid #fed7aa; border-radius: 12px; padding: 16px; }
.stat-card .num { font-size: 1.6rem; font-weight: 700; color: #9a3412; }
.stat-card .label { font-size: .75rem; color: #9a3412; }
.date-range { display: flex; gap: 10px; align-items: flex-end; flex-wrap: wrap; margin-bottom: 14px; }
.date-range label { font-size: .75rem; color: #52525b; display: block; margin-bottom: 4px; }
.date-range input { padding: 8px 10px; border: 1px solid #e4e4e7; border-radius: 8px; font-size: .85rem; background: #fff; }
.muted { color: #a1a1aa; font-size: .75rem; }
.alert-error { color: #dc2626; font-size: .82rem; margin-top: 8px; }

/* 设备弹窗 */
.modal { position: fixed; inset: 0; z-index: 100; display: flex; align-items: center; justify-content: center; }
.modal[hidden] { display: none; }
.modal-mask { position: absolute; inset: 0; background: rgba(0,0,0,.4); }
.modal-box { position: relative; background: #fff; border-radius: 14px; width: 92%; max-width: 620px; max-height: 84vh; overflow: auto; padding: 20px; box-shadow: 0 20px 60px rgba(0,0,0,.2); }
.modal-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 14px; }
.modal-head h3 { font-size: .95rem; }
.modal-body { font-size: .82rem; }
.mono { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: .76rem; word-break: break-all; }
.dev-table { font-size: .8rem; }
.dev-table th, .dev-table td { padding: 8px 10px; }