:root {
  --bg: #f4f6fb;
  --panel: #ffffff;
  --line: #e6e9f0;
  --text: #1f2430;
  --muted: #8a90a2;
  --primary: #3b5bff;
  --danger: #e23b3b;
}
* { box-sizing: border-box; }
body { margin: 0; font-family: -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg); color: var(--text); font-size: 14px; }

/* 登录 */
.login-box { max-width: 320px; margin: 12vh auto; background: var(--panel);
  border: 1px solid var(--line); border-radius: 14px; padding: 28px; }
.login-box h2 { margin: 0 0 18px; text-align: center; }
.login-box .inp { display: block; width: 100%; margin-bottom: 12px; padding: 10px 12px;
  border: 1px solid var(--line); border-radius: 8px; font-size: 14px; }
.login-box .btn { width: 100%; padding: 10px; }
.login-msg { margin-top: 10px; min-height: 18px; color: var(--danger); text-align: center; font-size: 13px; }

/* 布局 */
.admin-header { display: flex; justify-content: space-between; align-items: center;
  padding: 12px 20px; background: var(--panel); border-bottom: 1px solid var(--line); }
.brand { font-weight: 700; font-size: 16px; }
.admin-user { color: var(--muted); font-size: 13px; }
.admin-user a { color: var(--primary); text-decoration: none; }
.admin-nav { display: flex; gap: 6px; padding: 10px 20px 0; background: var(--panel); flex-wrap: wrap; }
.admin-nav .tab-btn { border: none; background: transparent; padding: 8px 14px; cursor: pointer;
  border-radius: 8px 8px 0 0; color: var(--muted); font-size: 14px; }
.admin-nav .tab-btn.active { background: var(--bg); color: var(--text); font-weight: 600; }
.admin-view { padding: 20px; }

/* 通用 */
.btn { border: 1px solid var(--line); background: var(--panel); color: var(--text);
  padding: 8px 14px; border-radius: 8px; cursor: pointer; font-size: 14px; }
.btn:hover { background: #f0f2f8; }
.btn-primary { background: var(--primary); color: #fff; border-color: var(--primary); }
.btn-primary:hover { background: #2f4be0; }
.btn-danger { color: var(--danger); border-color: #f3c2c2; }
.inp { border: 1px solid var(--line); border-radius: 8px; padding: 8px 10px; font-size: 14px; }
.muted { color: var(--muted); font-size: 13px; }
.error { color: var(--danger); }
.loading { color: var(--muted); padding: 20px; }
.lnk { color: var(--primary); text-decoration: none; }
.toolbar { display: flex; gap: 8px; align-items: center; margin-bottom: 14px; flex-wrap: wrap; }
.toolbar .inp { min-width: 200px; }

/* 总览 */
.stat-cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); gap: 14px; margin-bottom: 22px; }
.stat-card { background: var(--panel); border: 1px solid var(--line); border-radius: 12px; padding: 18px; text-align: center; }
.stat-num { font-size: 28px; font-weight: 700; color: var(--primary); }
.stat-label { color: var(--muted); margin-top: 6px; }
.dash-cols { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.dash-col { background: var(--panel); border: 1px solid var(--line); border-radius: 12px; padding: 14px; }
.dash-col h3 { margin: 0 0 10px; font-size: 15px; }

/* 表格 */
.tbl { width: 100%; border-collapse: collapse; background: var(--panel); border: 1px solid var(--line); border-radius: 12px; overflow: hidden; }
.tbl th, .tbl td { padding: 10px 12px; text-align: left; border-bottom: 1px solid var(--line); font-size: 13px; vertical-align: top; }
.tbl th { background: #f7f9ff; color: var(--muted); font-weight: 600; }
.tbl tr:last-child td { border-bottom: none; }
.tbl tr:hover td { background: #fafbff; }

/* 导出 / 密码 */
.export-box, .pwd-box { background: var(--panel); border: 1px solid var(--line); border-radius: 12px; padding: 20px; max-width: 560px; }
.pwd-box .fld { display: block; margin-bottom: 14px; }
.pwd-box .fld-label { display: block; margin-bottom: 6px; font-weight: 600; }
.pwd-box .inp { width: 100%; }

/* 弹窗 */
.modal-mask { position: fixed; inset: 0; background: rgba(0,0,0,.4); display: flex; align-items: center; justify-content: center; z-index: 50; }
.modal-box { background: var(--panel); border-radius: 12px; max-width: 560px; width: 92%; max-height: 84vh; overflow: auto; }
.modal-head { display: flex; justify-content: space-between; align-items: center; padding: 14px 18px; border-bottom: 1px solid var(--line); }
.modal-close { cursor: pointer; font-size: 22px; color: var(--muted); }
.modal-body { padding: 16px 18px; }
.modal-body h4 { margin: 16px 0 6px; }

/* toast */
.toast { position: fixed; left: 50%; bottom: 36px; transform: translateX(-50%) translateY(20px);
  background: #1f2430; color: #fff; padding: 10px 18px; border-radius: 8px; font-size: 14px; opacity: 0;
  pointer-events: none; transition: all .2s; z-index: 99; }
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }
.toast.err { background: var(--danger); }