:root {
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --primary-light: #dbeafe;
  --danger: #dc2626;
  --danger-light: #fee2e2;
  --success: #16a34a;
  --success-light: #dcfce7;
  --warning: #d97706;
  --warning-light: #fef3c7;
  --text: #1f2937;
  --text-light: #6b7280;
  --border: #e5e7eb;
  --bg: #f3f4f6;
  --card: #ffffff;
  --radius: 8px;
  --shadow: 0 1px 3px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.04);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: "Microsoft YaHei", "PingFang SC", sans-serif; font-size: 14px; color: var(--text); background: var(--bg); }

/* ---------- 布局 ---------- */
.layout { display: flex; min-height: 100vh; }
.sidebar { width: 200px; background: #111827; color: #d1d5db; flex-shrink: 0; position: sticky; top: 0; height: 100vh; overflow-y: auto; }
.brand { padding: 18px 16px; font-size: 16px; font-weight: 700; color: #fff; border-bottom: 1px solid #1f2937; }
.nav { padding: 8px 0; }
.nav-item { display: block; padding: 10px 16px; color: #d1d5db; text-decoration: none; font-size: 14px; border-left: 3px solid transparent; }
.nav-item:hover { background: #1f2937; color: #fff; }
.nav-item.active { background: #1f2937; color: #fff; border-left-color: var(--primary); }
.main { flex: 1; display: flex; flex-direction: column; min-width: 0; }
.topbar { background: var(--card); border-bottom: 1px solid var(--border); padding: 12px 20px; display: flex; justify-content: space-between; align-items: center; }
.topbar-title { font-size: 16px; font-weight: 600; }
.topbar-user { display: flex; gap: 8px; align-items: center; color: var(--text-light); }
.content { padding: 20px; flex: 1; }

/* ---------- 卡片 ---------- */
.card { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow); padding: 16px; margin-bottom: 16px; }
.card-title { font-size: 15px; font-weight: 600; margin-bottom: 12px; }
.grid { display: grid; gap: 12px; }
.grid-2 { grid-template-columns: 1fr 1fr; }
.grid-3 { grid-template-columns: 1fr 1fr 1fr; }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

/* ---------- 统计卡 ---------- */
.stat-card { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 14px 16px; box-shadow: var(--shadow); }
.stat-label { font-size: 13px; color: var(--text-light); }
.stat-value { font-size: 20px; font-weight: 700; margin-top: 4px; }
.stat-value.pos { color: var(--danger); }
.stat-value.neg { color: var(--success); }

/* ---------- 按钮 ---------- */
.btn { display: inline-flex; align-items: center; gap: 4px; padding: 7px 14px; border: 1px solid transparent; border-radius: 6px; font-size: 13px; cursor: pointer; text-decoration: none; background: var(--primary); color: #fff; line-height: 1.4; white-space: nowrap; }
.btn:hover { background: var(--primary-dark); }
.btn-sm { padding: 4px 9px; font-size: 12px; }
.btn-ghost { background: transparent; color: var(--text-light); border-color: var(--border); }
.btn-ghost:hover { background: var(--bg); color: var(--text); }
.btn-danger { background: var(--danger); }
.btn-danger:hover { background: #b91c1c; }
.btn-success { background: var(--success); }
.btn-success:hover { background: #15803d; }
.btn-warning { background: var(--warning); }
.btn-warning:hover { background: #b45309; }
.btn-outline { background: #fff; color: var(--primary); border-color: var(--primary); }
.btn-outline:hover { background: var(--primary-light); }

/* ---------- 表格 ---------- */
.table-wrap { overflow-x: auto; }
table.table { width: 100%; border-collapse: collapse; background: #fff; font-size: 13px; }
.table th { background: #f9fafb; font-weight: 600; padding: 9px 10px; border-bottom: 2px solid var(--border); text-align: left; white-space: nowrap; }
.table td { padding: 8px 10px; border-bottom: 1px solid var(--border); }
.table tr:hover td { background: #f9fafb; }
.table .num { text-align: right; font-variant-numeric: tabular-nums; white-space: nowrap; }
.table .ctr { text-align: center; white-space: nowrap; }
.table tfoot td { font-weight: 700; background: #f9fafb; }
.table tfoot td.num { color: var(--primary-dark); }

/* ---------- 标签/状态 ---------- */
.badge { display: inline-block; padding: 2px 8px; border-radius: 10px; font-size: 12px; font-weight: 600; }
.badge-blue { background: var(--primary-light); color: var(--primary-dark); }
.badge-green { background: var(--success-light); color: var(--success); }
.badge-orange { background: var(--warning-light); color: var(--warning); }
.badge-red { background: var(--danger-light); color: var(--danger); }
.badge-gray { background: #f3f4f6; color: var(--text-light); }

/* ---------- 表单 ---------- */
.form-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 12px; }
.form-item { display: flex; flex-direction: column; gap: 4px; }
.form-item label { font-size: 13px; color: var(--text-light); }
.form-item input, .form-item select, .form-item textarea {
  padding: 7px 10px; border: 1px solid var(--border); border-radius: 6px; font-size: 13px; background: #fff; color: var(--text);
}
.form-item input:focus, .form-item select:focus, .form-item textarea:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 2px var(--primary-light); }
.form-item textarea { resize: vertical; min-height: 60px; }
.form-row { display: flex; gap: 12px; flex-wrap: wrap; align-items: flex-end; margin-bottom: 14px; }
.form-row .form-item { flex: 0 0 auto; }
.checkbox-group { display: flex; flex-wrap: wrap; gap: 10px; }
.checkbox-group label { display: inline-flex; align-items: center; gap: 4px; font-size: 13px; }

/* ---------- 筛选栏 ---------- */
.filter-bar { display: flex; gap: 10px; flex-wrap: wrap; align-items: flex-end; padding: 14px 16px; }
.filter-bar .form-item { flex: 0 0 auto; }

/* ---------- 弹窗 ---------- */
.modal-mask { position: fixed; inset: 0; background: rgba(0,0,0,.45); display: none; align-items: center; justify-content: center; z-index: 1000; }
.modal-mask.show { display: flex; }
.modal { background: #fff; border-radius: 10px; box-shadow: 0 10px 40px rgba(0,0,0,.2); width: 640px; max-width: 92vw; max-height: 86vh; display: flex; flex-direction: column; }
.modal-head { padding: 14px 18px; border-bottom: 1px solid var(--border); display: flex; justify-content: space-between; align-items: center; font-weight: 600; }
.modal-body { padding: 16px 18px; overflow-y: auto; }
.modal-foot { padding: 12px 18px; border-top: 1px solid var(--border); display: flex; justify-content: flex-end; gap: 10px; }

/* ---------- 提示 ---------- */
.alert { padding: 10px 14px; border-radius: 6px; margin-bottom: 12px; font-size: 13px; }
.alert-success { background: var(--success-light); color: var(--success); }
.alert-error { background: var(--danger-light); color: var(--danger); }
.alert-info { background: var(--primary-light); color: var(--primary-dark); }

/* ---------- 登录页 ---------- */
.login-wrap { min-height: 100vh; display: flex; flex-direction: column; align-items: center; justify-content: center; background: linear-gradient(135deg, #1e3a8a, #2563eb); padding: 20px; }
.login-card { background: #fff; border-radius: 12px; padding: 36px 40px; width: 380px; box-shadow: 0 20px 60px rgba(0,0,0,.25); }
.login-card h1 { font-size: 20px; text-align: center; margin-bottom: 24px; color: var(--primary-dark); }
.login-card .form-item { margin-bottom: 16px; }
.login-card .btn { width: 100%; justify-content: center; padding: 10px; }
.login-wrap .alert { width: 380px; }

/* ---------- 页签 ---------- */
.tabs { display: flex; gap: 4px; border-bottom: 2px solid var(--border); margin-bottom: 16px; }
.tab { padding: 8px 16px; cursor: pointer; font-size: 14px; color: var(--text-light); border-bottom: 2px solid transparent; margin-bottom: -2px; }
.tab.active { color: var(--primary); border-bottom-color: var(--primary); font-weight: 600; }
.tab-panel { display: none; }
.tab-panel.active { display: block; }

/* ---------- 分段按钮 ---------- */
.seg { display: inline-flex; border: 1px solid var(--border); border-radius: 6px; overflow: hidden; }
.seg-btn { padding: 6px 18px; font-size: 13px; background: #fff; border: none; cursor: pointer; color: var(--text-light); }
.seg-btn + .seg-btn { border-left: 1px solid var(--border); }
.seg-btn.active { background: var(--primary); color: #fff; }

/* ---------- 拼音搜索选择列表 ---------- */
.pick-list { border: 1px solid var(--border); border-radius: 6px; margin-top: 6px; overflow-y: auto; }
.pick-item { display: flex; align-items: center; gap: 8px; padding: 7px 10px; cursor: pointer; font-size: 13px; border-bottom: 1px solid #f3f4f6; }
.pick-item:last-child { border-bottom: none; }
.pick-item:hover { background: var(--primary-light); }
.pick-item input { accent-color: var(--primary); }
.pick-item.checked { background: var(--primary-light); }

/* ---------- 其他 ---------- */
.muted { color: var(--text-light); font-size: 12px; }
.mt12 { margin-top: 12px; }
.mb12 { margin-bottom: 12px; }
.flex { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.flex-between { display: flex; justify-content: space-between; align-items: center; }
.right { text-align: right; }
a.link { color: var(--primary); text-decoration: none; }
a.link:hover { text-decoration: underline; }
a.link.danger { color: var(--danger); }
a.link.danger:hover { text-decoration: underline; }
.empty { text-align: center; color: var(--text-light); padding: 40px 0; }

/* 单据图片缩略图（进货单表单/详情共用，点击放大走 showImg 弹窗） */
.doc-thumb { position: relative; width: 96px; height: 96px; border: 1px solid var(--border); border-radius: 6px; overflow: hidden; background: #f2f4f8; }
.doc-thumb img { width: 100%; height: 100%; object-fit: cover; display: block; cursor: zoom-in; }
.doc-del { position: absolute; top: 2px; right: 2px; width: 20px; height: 20px; line-height: 18px; border: none; border-radius: 50%; background: rgba(192,57,43,.92); color: #fff; cursor: pointer; font-size: 14px; padding: 0; }
.doc-del:hover { background: #d24535; }
.pill { display: inline-block; min-width: 44px; text-align: center; }
.tabbar { display: flex; gap: 4px; border-bottom: 1px solid var(--border); margin-bottom: 14px; padding: 0 2px; }
.tab { padding: 8px 16px; font-size: 14px; color: var(--text-light); text-decoration: none; border-bottom: 2px solid transparent; margin-bottom: -1px; }
.tab:hover { color: var(--primary); }
.tab.active { color: var(--primary); border-bottom-color: var(--primary); font-weight: 600; }

/* ---------- 移动端汉堡按钮（桌面端隐藏） ---------- */
.hamburger {
  display: none; align-items: center; justify-content: center;
  width: 38px; height: 38px; border: 1px solid var(--border); border-radius: 6px;
  background: #fff; color: var(--text); font-size: 18px; line-height: 1; cursor: pointer; margin-right: 10px; flex: none;
}
.sidebar-backdrop { display: none; position: fixed; inset: 0; background: rgba(0,0,0,.4); z-index: 1090; }
.sidebar-backdrop.show { display: block; }

/* ========== 移动端适配（窄屏 ≤768px） ========== */
/* 收款付款登记按钮：桌面端显示完整文字、隐藏缩写（移动端在下方 media 反转） */
.btn-short { display: none; }
.btn-full { display: inline; }

/* 手机横屏（宽 844~932、高 ≤500，如 iPhone 横握）继续用移动端布局：
   否则旋转瞬间在「抽屉布局 ↔ 桌面侧栏布局」间切换，iOS 上会闪屏且突然出现侧栏 */
@media (max-width: 768px), (max-width: 932px) and (max-height: 500px) {
  /* 侧边栏改为抽屉：默认移出视口，.open 时滑入 */
  .sidebar {
    position: fixed; left: 0; top: 0; z-index: 1100; height: 100vh;
    transform: translateX(-100%); transition: transform .25s ease;
    box-shadow: 2px 0 16px rgba(0,0,0,.3);
  }
  .sidebar.open { transform: translateX(0); }
  .main { margin-left: 0; }
  /* 顶栏显示汉堡 */
  .hamburger { display: inline-flex; }
  .topbar { padding: 10px 12px; }
  .topbar-title { font-size: 15px; }
  .content { padding: 12px; }
  /* 多列栅格在手机堆叠为单列 */
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  /* 双卡并排（发票/收付款）手机堆叠为单列，避免整页横向溢出 */
  .split-cols { grid-template-columns: 1fr; }
  /* 关键：grid 子项默认 min-width:auto，会被卡内表格的 min-width 撑出轨道，
     导致整页横向溢出、手机浏览器整体缩小显示（表现为内容只占左半屏） */
  .split-cols > .card { min-width: 0; }
  /* 详情页顶部「左信息 + 右按钮」改为上下堆叠，按钮行随 .flex 自动换行 */
  .flex-between { flex-direction: column; align-items: flex-start; gap: 10px; }
  /* 宽明细表在手机保持列宽、明确横向滚动，避免列被压窄到看不清 */
  .table-wrap table.table { min-width: 720px; }
  /* 收付款记录详情弹窗里的 3 列明细表：覆盖上面的 720 强制宽度，
     固定列宽 + 备注自动换行，手机端自适应不横滑 */
  .table-wrap table.pay-detail-tbl { min-width: 0 !important; table-layout: fixed; }
  .pay-detail-tbl th:nth-child(1), .pay-detail-tbl td:nth-child(1) { width: 60px; }
  .pay-detail-tbl th:nth-child(2), .pay-detail-tbl td:nth-child(2) { width: 104px; }
  .pay-detail-tbl th:nth-child(3), .pay-detail-tbl td:nth-child(3) { width: auto; }
  .pay-detail-tbl td:nth-child(3) { white-space: normal; word-break: break-all; }
  /* 触控目标放大，便于手指点击 */
  .btn { padding: 10px 16px; font-size: 14px; min-height: 40px; }
  .btn-sm { padding: 7px 12px; min-height: 32px; }
  .nav-item { padding: 13px 16px; font-size: 15px; }
  /* 表格保持横向滚动，字号略缩以多显示内容 */
  .table th, .table td { padding: 8px 8px; font-size: 12px; }
  .table tfoot td { font-size: 12px; }
  /* 登录页自适应，避免小屏溢出 */
  .login-card { width: 100%; max-width: 380px; padding: 28px 22px; }
  .login-wrap .alert { width: 100%; max-width: 380px; }
  /* 收款付款：移动端 4 按钮（查询/重置/登记）并排一行；
     !important 用于压过 pay-actions 容器的内联 margin-left:auto，
     使 4 钮靠左紧凑排列（与已确认效果图一致） */
  .filter-bar .pay-actions { margin-left: 0 !important; gap: 10px; }
  .btn-short { display: inline; }
  .btn-full { display: none; }
  /* 修复 iOS Safari 上 input[type=date] 无视 width:100%、按固有最小宽度溢出，
     导致两日期框横向重叠（Chrome 无此问题，故预览图看不出）。
     appearance:none 使其在 iOS 也收缩到容器宽度，点按仍弹出系统日期滚轮；
     置于此移动端媒体块内，桌面端日期选择器不受影响。 */
  .filter-bar input[type="date"],
  .filter-bar input[type="datetime-local"],
  .modal-inv-body input[type="date"] {
    -webkit-appearance: none;
    appearance: none;
    min-width: 0;
    /* appearance:none 后 iOS 空日期框会失去固有高度而塌陷，显式给高与其他控件一致 */
    min-height: 35px;
  }
  /* 移动端输入控件 16px：避免 iOS 聚焦时自动放大整页（弹窗被顶出屏幕）。
     仅移动端媒体块内，桌面端字号不变。 */
  .form-item input, .form-item select, .form-item textarea { font-size: 16px; }
}