* { box-sizing: border-box; margin: 0; padding: 0; }
:root {
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --danger: #dc2626;
  --bg: #f1f5f9;
  --card: #ffffff;
  --text: #1e293b;
  --muted: #64748b;
  --border: #e2e8f0;
}
body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 15px;
  line-height: 1.5;
}
[v-cloak] { display: none; }

/* ---------- 顶部 ---------- */
.app-header {
  background: linear-gradient(135deg, #2563eb, #1e40af);
  color: #fff;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 8px rgba(0,0,0,.15);
}
.header-inner { max-width: 1100px; margin: 0 auto; padding: 10px 16px 0; }
.header-inner h1 { font-size: 20px; font-weight: 700; padding-bottom: 8px; }
.tabs { display: flex; gap: 4px; overflow-x: auto; -webkit-overflow-scrolling: touch; }
.tab {
  flex: 1;
  min-width: max-content;
  padding: 10px 16px;
  background: transparent;
  border: none;
  color: rgba(255,255,255,.85);
  font-size: 15px;
  cursor: pointer;
  border-radius: 8px 8px 0 0;
  transition: background .2s;
}
.tab.active {
  background: #fff;
  color: var(--primary);
  font-weight: 700;
}

/* ---------- 布局 ---------- */
.container { max-width: 1100px; margin: 0 auto; padding: 16px; }
.panel {
  background: var(--card);
  border-radius: 12px;
  padding: 16px;
  margin-bottom: 16px;
  box-shadow: 0 1px 3px rgba(0,0,0,.08);
}
.panel-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 12px;
}
.panel-head h2 { font-size: 17px; font-weight: 700; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-block;
  padding: 8px 16px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #fff;
  color: var(--text);
  font-size: 14px;
  cursor: pointer;
  text-decoration: none;
  text-align: center;
  transition: all .15s;
  white-space: nowrap;
}
.btn:hover { background: #f8fafc; }
.btn:disabled { opacity: .5; cursor: not-allowed; }
.btn-primary { background: var(--primary); border-color: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-danger { color: var(--danger); border-color: #fecaca; }
.btn-danger:hover { background: #fef2f2; }
.btn-sm { padding: 4px 10px; font-size: 13px; border-radius: 6px; }
.btn-lg { padding: 12px 40px; font-size: 16px; }

/* ---------- 表单 ---------- */
.form-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 14px;
}
.form-item label { display: block; font-size: 13px; color: var(--muted); margin-bottom: 5px; }
.form-item label b { color: var(--danger); }
.form-item input, .form-item select {
  width: 100%;
  padding: 9px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 15px;
  background: #fff;
  color: var(--text);
}
.form-item input:focus, .form-item select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37,99,235,.12);
}
.form-actions { margin-top: 16px; text-align: right; }
.inline-form { display: flex; gap: 8px; flex-wrap: wrap; }
.inline-form input {
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 14px;
  min-width: 200px;
}

/* ---------- 大类/商品列表 ---------- */
.cat-list { display: flex; flex-direction: column; gap: 8px; }
.cat-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: 10px;
  cursor: pointer;
  transition: all .15s;
}
.cat-item:hover { border-color: var(--primary); }
.cat-item.selected { border-color: var(--primary); background: #eff6ff; }
.cat-info { display: flex; align-items: center; gap: 12px; }
.cat-name { font-weight: 600; font-size: 15px; }
.cat-count { font-size: 12px; color: var(--muted); background: #f1f5f9; padding: 2px 8px; border-radius: 10px; }
.cat-actions { display: flex; gap: 6px; }
.prod-list { display: flex; flex-wrap: wrap; gap: 8px; }
.prod-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #f8fafc;
}
.empty { color: var(--muted); text-align: center; padding: 20px 0; }
.tip { font-size: 12px; color: var(--muted); margin-top: 10px; }

/* ---------- 表格 ---------- */
.table-wrap { overflow-x: auto; }
.table { width: 100%; border-collapse: collapse; font-size: 14px; }
.table th, .table td {
  padding: 10px 8px;
  text-align: left;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}
.table th { background: #f8fafc; font-weight: 600; color: var(--muted); position: sticky; top: 0; }
.table tbody tr:hover { background: #f8fafc; }
.gross { font-weight: 700; color: var(--primary); }

/* ---------- 统计 ---------- */
.filter-bar { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.filter-bar input { padding: 8px 10px; border: 1px solid var(--border); border-radius: 8px; font-size: 14px; }
.summary-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 10px;
  margin-bottom: 8px;
}
.card {
  background: #f8fafc;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px 14px;
}
.card-gross { background: #eff6ff; border-color: #bfdbfe; }
.card-label { font-size: 12px; color: var(--muted); }
.card-value { font-size: 20px; font-weight: 700; margin-top: 4px; }

/* ---------- 导入 ---------- */
.import-row { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; margin-top: 8px; }
.import-row input[type=file] { font-size: 14px; }
.import-result { margin-top: 12px; padding: 12px; background: #f0fdf4; border: 1px solid #bbf7d0; border-radius: 8px; font-size: 14px; }
.import-result ul { margin: 6px 0 0 18px; }
.warn-text { color: var(--danger); font-weight: 600; }
.stock-hint { margin-top: 12px; font-size: 14px; color: var(--muted); }

/* ---------- Toast ---------- */
.toast {
  position: fixed;
  top: 70px;
  left: 50%;
  transform: translateX(-50%);
  background: #111827;
  color: #fff;
  padding: 12px 22px;
  border-radius: 10px;
  font-size: 14px;
  z-index: 999;
  box-shadow: 0 4px 16px rgba(0,0,0,.2);
  max-width: 90vw;
  animation: fadeIn .2s;
}
.toast.success { background: #16a34a; }
.toast.error { background: #dc2626; }
@keyframes fadeIn { from { opacity: 0; transform: translate(-50%, -8px); } to { opacity: 1; transform: translate(-50%, 0); } }

/* ---------- 统计-大类折叠 ---------- */
.category-block { border: 1px solid var(--border); border-radius: 10px; margin-bottom: 8px; overflow: hidden; }
.category-header {
  display: flex; align-items: center; gap: 10px; flex-wrap: wrap;
  padding: 12px 14px; background: #f8fafc; cursor: pointer;
  transition: background .15s; user-select: none;
}
.category-header:hover { background: #eff6ff; }
.toggle-icon { font-size: 12px; color: var(--muted); width: 14px; display: inline-block; }
.cat-title { font-weight: 700; font-size: 15px; }
.cat-badge { font-size: 12px; color: var(--muted); background: #e2e8f0; padding: 2px 8px; border-radius: 10px; }
.cat-metric { font-size: 13px; color: var(--muted); }
.cat-metric b { color: var(--text); font-weight: 600; }
.category-detail { padding: 0 14px 12px; border-top: 1px solid var(--border); }
.category-detail .table-wrap { margin-top: 10px; }
.foldable-head { cursor: pointer; user-select: none; }
.foldable-head h2 { display: flex; align-items: center; gap: 6px; }

/* ---------- 表格行操作 ---------- */
.row-actions { display: flex; gap: 4px; }

/* ---------- 编辑弹窗 ---------- */
.modal-overlay {
  position: fixed; top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0,0,0,.45);
  z-index: 1000;
  display: flex; align-items: center; justify-content: center;
  padding: 16px;
  animation: fadeIn .15s;
}
.modal-box {
  background: #fff;
  border-radius: 14px;
  width: 100%; max-width: 560px;
  max-height: 90vh; overflow-y: auto;
  box-shadow: 0 8px 32px rgba(0,0,0,.2);
}
.modal-head {
  display: flex; align-items: center; justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
}
.modal-head h3 { font-size: 17px; font-weight: 700; }
.modal-close {
  border: none; background: none; font-size: 24px;
  color: var(--muted); cursor: pointer; line-height: 1; padding: 0 4px;
}
.modal-close:hover { color: var(--text); }
.modal-body { padding: 20px; }
.modal-footer {
  display: flex; justify-content: flex-end; gap: 10px;
  padding: 12px 20px;
  border-top: 1px solid var(--border);
}

/* ---------- 手机适配 ---------- */
@media (max-width: 640px) {
  .header-inner { padding: 8px 10px 0; }
  .header-inner h1 { font-size: 17px; }
  .container { padding: 10px; }
  .panel { padding: 12px; border-radius: 10px; }
  .form-grid { grid-template-columns: 1fr 1fr; gap: 10px; }
  .btn-lg { width: 100%; }
  .card-value { font-size: 17px; }
  .table { font-size: 12.5px; }
  .table th, .table td { padding: 8px 6px; }
}
@media (max-width: 420px) {
  .form-grid { grid-template-columns: 1fr; }
}