:root {
  --bg: #f4f5f7;
  --card: #ffffff;
  --primary: #2f6fed;
  --primary-dark: #1e54c4;
  --text: #1f2430;
  --muted: #6b7280;
  --border: #e5e7eb;
  --danger: #e5484d;
  --success: #16a34a;
  --warn: #f59e0b;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, "PingFang SC", "Microsoft YaHei", Segoe UI, sans-serif;
  background: var(--bg);
  color: var(--text);
}
a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

.topbar {
  background: var(--card);
  border-bottom: 1px solid var(--border);
  padding: 0 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 56px;
}
.topbar .brand { font-weight: 700; font-size: 16px; }
.topbar nav a {
  margin-right: 16px;
  color: var(--text);
  font-size: 14px;
}
.topbar .userbox { font-size: 13px; color: var(--muted); display: flex; align-items: center; gap: 10px; }
.topbar .userbox form { display: inline; }

.container {
  max-width: 1080px;
  margin: 24px auto;
  padding: 0 16px;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 20px;
  margin-bottom: 16px;
}

h1 { font-size: 20px; margin: 0 0 16px; }
h2 { font-size: 16px; margin: 0 0 12px; }

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}
th, td {
  text-align: left;
  padding: 8px 10px;
  border-bottom: 1px solid var(--border);
}
th { color: var(--muted); font-weight: 600; background: #fafbfc; }
tr:hover td { background: #fafbfc; }

.btn {
  display: inline-block;
  padding: 7px 14px;
  border-radius: 6px;
  background: var(--primary);
  color: #fff;
  border: none;
  cursor: pointer;
  font-size: 14px;
}
.btn:hover { background: var(--primary-dark); text-decoration: none; }
.btn-danger { background: var(--danger); }
.btn-secondary { background: var(--muted); }
.btn-sm { padding: 4px 10px; font-size: 13px; }

.form-row { margin-bottom: 12px; }
.form-row label { display: block; font-size: 13px; color: var(--muted); margin-bottom: 4px; }
input[type=text], input[type=password], input[type=number], input[type=date], select, textarea {
  width: 100%;
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 14px;
}
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.grid-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 12px; }

.badge { display: inline-block; padding: 2px 8px; border-radius: 10px; font-size: 12px; }
.badge-admin { background: #e0e7ff; color: #3730a3; }
.badge-operator { background: #dcfce7; color: #166534; }
.badge-low { background: #fee2e2; color: #991b1b; }

.error { color: var(--danger); font-size: 13px; margin-bottom: 12px; }
.success { color: var(--success); font-size: 13px; margin-bottom: 12px; }

.stat-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin-bottom: 16px; }
.stat-card { background: var(--card); border: 1px solid var(--border); border-radius: 10px; padding: 16px; }
.stat-card .num { font-size: 26px; font-weight: 700; }
.stat-card .label { font-size: 13px; color: var(--muted); }

.login-wrap {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
}
.login-card { width: 320px; }

.item-row { display: grid; grid-template-columns: 2fr 1fr 1fr auto; gap: 8px; margin-bottom: 8px; align-items: center; }
.item-row-5 { grid-template-columns: 2fr 1fr 1fr 1fr auto; }
.item-row-4 { grid-template-columns: 2fr 1fr 1fr auto; }
.muted { color: var(--muted); font-size: 13px; }
.right { text-align: right; }

/* ===== 导航折叠按钮 & 移动端专属元素：桌面端默认隐藏 ===== */
.nav-toggle { display: none; background: none; border: none; font-size: 22px; cursor: pointer; color: var(--text); padding: 4px 8px; }
.nav-userbox { display: none; }
.mobile-quick-actions { display: none; }
.mobile-order-cards { display: none; }
.table-wrap { width: 100%; }

/* ===== 平板/手机（≤768px） ===== */
@media (max-width: 768px) {
  .topbar {
    height: auto;
    min-height: 52px;
    flex-wrap: wrap;
    padding: 10px 14px;
    position: sticky;
    top: 0;
    z-index: 50;
  }
  .nav-toggle { display: block; }
  .topbar .userbox { display: none; } /* 用折叠菜单里的账号区块代替 */

  .topbar nav {
    display: none;
    flex-direction: column;
    width: 100%;
    order: 3;
    margin-top: 10px;
    border-top: 1px solid var(--border);
    padding-top: 10px;
  }
  .topbar nav.open { display: flex; }
  .topbar nav a {
    padding: 12px 6px;
    margin-right: 0;
    font-size: 15px;
    border-bottom: 1px solid var(--border);
  }
  .nav-userbox {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-top: 8px;
    padding-top: 8px;
    font-size: 13px;
    color: var(--muted);
  }

  .container { margin: 12px auto; padding: 0 10px; }

  .mobile-quick-actions {
    display: flex;
    gap: 8px;
    margin-bottom: 14px;
  }
  .mobile-quick-actions .btn {
    flex: 1;
    text-align: center;
    padding: 12px 8px;
    font-size: 14px;
  }

  .card { padding: 14px; border-radius: 8px; }
  h1 { font-size: 18px; }

  /* 表单：网格改单列 */
  .grid-2, .grid-3 { grid-template-columns: 1fr; }

  /* 单据明细行：桌面多列网格 → 手机上堆叠成一张张小卡片 */
  .item-row, .item-row-5, .item-row-4 {
    grid-template-columns: 1fr !important;
    gap: 6px;
    background: #fafbfc;
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 10px;
    margin-bottom: 10px;
  }
  .item-row select, .item-row input,
  .item-row-5 select, .item-row-5 input,
  .item-row-4 select, .item-row-4 input {
    font-size: 16px; /* 防止 iOS 自动放大页面 */
  }
  .item-row .btn-danger, .item-row-5 .btn-danger, .item-row-4 .btn-danger {
    width: 100%;
  }

  /* 触摸目标放大 */
  .btn { padding: 10px 16px; font-size: 15px; }
  .btn-sm { padding: 8px 12px; }
  input, select, textarea { padding: 10px; font-size: 16px; }

  /* 表格：横向滚动而不是被压扁 */
  .card { overflow-x: auto; }
  table { min-width: 560px; font-size: 13px; }
  th, td { padding: 8px 6px; }

  .stat-grid { grid-template-columns: 1fr; gap: 8px; }
  .stat-card .num { font-size: 22px; }

  /* 销售单列表：手机上用卡片代替11列的表格，横向滚动太难读 */
  .desktop-table-wrap { display: none; }
  .mobile-order-cards { display: flex; flex-direction: column; gap: 10px; }
  .order-card {
    display: block;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 12px 14px;
    color: var(--text);
    text-decoration: none;
  }
  .order-card:hover { text-decoration: none; }
  .order-card-top {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 6px;
    font-weight: 600;
  }
  .order-card-id { font-size: 15px; }
  .order-card-mid {
    display: flex;
    justify-content: space-between;
    color: var(--muted);
    font-size: 13px;
    margin-bottom: 6px;
  }
  .order-card-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
  }
  .order-card-amount { font-size: 18px; font-weight: 700; }
  .order-card-debt {
    margin-top: 6px;
    font-size: 13px;
    color: var(--danger);
    font-weight: 600;
  }
}