:root{
  --primary:#07c160;
  --primary-dark:#06a050;
  --primary-soft:#e8f8ee;
  --bg:#f2f3f5;
  --card:#fff;
  --text:#1a1a1a;
  --muted:#888;
  --border:#e5e5e5;
  --danger:#fa5151;
  --warn:#fa9d3b;
  /* 安全区（刘海屏/手势条），配合 viewport-fit=cover 使用 */
  --sat:env(safe-area-inset-top,0px);
  --sab:env(safe-area-inset-bottom,0px);
  --sal:env(safe-area-inset-left,0px);
  --sar:env(safe-area-inset-right,0px);
  /* Material Design 触控目标最小尺寸 */
  --tap:48px;
}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent;}
html,body{margin:0;padding:0;height:100%;}
body{
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;
  background:var(--bg);color:var(--text);font-size:16px;line-height:1.55;
  -webkit-text-size-adjust:100%;
  overscroll-behavior-y:none;
}
.view{min-height:100vh;display:flex;flex-direction:column;}
#app-view{display:flex;flex-direction:row;height:100vh;background:var(--bg);}
.hidden{display:none !important;}

/* ============ 左侧导航（桌面） ============ */
.sidebar{width:220px;flex:none;background:#1f2b3a;color:#fff;display:flex;flex-direction:column;}
.side-brand{font-size:20px;font-weight:700;padding:18px 20px;color:#fff;border-bottom:1px solid rgba(255,255,255,.08);letter-spacing:.5px;}
.sidebar nav{display:flex;flex-direction:column;padding:12px 0;flex:1;}
.sidebar nav button{display:flex;align-items:center;gap:12px;padding:12px 20px;border:none;background:none;color:rgba(255,255,255,.72);font-size:15px;cursor:pointer;text-align:left;border-left:3px solid transparent;}
.sidebar nav button .ti{font-size:20px;line-height:1;}
.sidebar nav button .tl{font-weight:500;}
.sidebar nav button:hover{background:rgba(255,255,255,.06);color:#fff;}
.sidebar nav button.active{background:rgba(7,193,96,.16);color:#fff;border-left-color:var(--primary);}
.side-foot{padding:14px 20px;border-top:1px solid rgba(255,255,255,.08);}
.side-foot #shop-name{display:block;font-size:13px;color:rgba(255,255,255,.8);margin-bottom:6px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}
.side-foot .link{color:rgba(255,255,255,.55);padding:0;font-size:14px;}
.side-foot .link:hover{color:#fff;}

/* ============ 主区 ============ */
.main{flex:1;display:flex;flex-direction:column;min-width:0;}
.topbar{
  display:flex;align-items:center;gap:12px;padding:12px 22px;background:#fff;border-bottom:1px solid var(--border);
  padding-top:calc(12px + var(--sat));
}
.topbar #today-stat{color:var(--muted);flex:1;font-size:14px;}
.topbar .link{color:var(--primary);}
.muted{color:var(--muted);font-size:14px;}
.err{color:var(--danger);font-size:14px;min-height:18px;margin:6px 0 0;}
.link{background:none;border:none;color:var(--primary);font-size:15px;cursor:pointer;padding:6px 10px;}

/* ============ 登录 ============ */
#login-view{align-items:center;justify-content:center;background:linear-gradient(135deg,#07c160,#06a050);padding:calc(16px + var(--sat)) 16px calc(16px + var(--sab));}
.login-card{background:#fff;border-radius:16px;padding:32px 24px;width:86%;max-width:340px;box-shadow:0 8px 30px rgba(0,0,0,.15);text-align:center;}
.login-card h1{margin:0 0 4px;color:var(--primary);font-size:26px;}
.login-card input{width:100%;padding:13px;border:1px solid var(--border);border-radius:10px;margin-top:18px;font-size:16px;}
/* 移动端输入框 16px 防 iOS 自动缩放 */
.login-card .trust-row input[type=checkbox]{width:20px;height:20px;min-width:20px;padding:0;margin:0;flex:none;accent-color:var(--primary);}
.login-card .trust-row{text-align:left;color:#444;}
.btn-primary{width:100%;min-height:var(--tap);padding:14px;border:none;border-radius:12px;background:var(--primary);color:#fff;font-size:17px;margin-top:14px;cursor:pointer;font-weight:500;}
.btn-primary:active{background:var(--primary-dark);transform:scale(.99);}

/* ============ 主体 ============ */
#page{flex:1;padding:20px 24px;overflow-y:auto;-webkit-overflow-scrolling:touch;}
.page-wrap{max-width:1180px;margin:0 auto;}
.card{background:var(--card);border-radius:12px;padding:14px;margin-bottom:12px;box-shadow:0 1px 3px rgba(0,0,0,.04);}
.row{display:flex;align-items:center;gap:8px;}
.row.between{justify-content:space-between;}
.section-title{font-size:15px;font-weight:600;margin:4px 2px 8px;color:#333;}
.sub-title{font-size:14px;font-weight:600;color:#555;margin:16px 0 6px;}
.collapse-sec{background:var(--card);border-radius:12px;margin-bottom:10px;overflow:hidden;box-shadow:0 1px 3px rgba(0,0,0,.04);}
.sec-head{width:100%;display:flex;align-items:center;justify-content:space-between;padding:13px 14px;border:none;background:none;cursor:pointer;font-size:15px;font-weight:600;color:#333;min-height:var(--tap);}
.sec-head:active{background:#f7f7f7;}
.sec-arrow{transition:transform .2s;color:var(--muted);font-size:13px;}
.collapse-sec.open .sec-arrow{transform:rotate(90deg);}
.sec-body{padding:2px 14px 16px;display:none;}
.collapse-sec.open .sec-body{display:block;animation:secIn .18s ease;}
@keyframes secIn{from{opacity:.4}to{opacity:1}}
.btn-sm{min-height:38px;padding:9px 14px;border:none;border-radius:9px;background:var(--primary);color:#fff;font-size:14px;cursor:pointer;}
.btn-sm.gray{background:#eee;color:#333;}
.btn-sm.danger{background:var(--danger);}
input,select{width:100%;padding:12px;border:1px solid var(--border);border-radius:10px;font-size:16px;background:#fff;}
label{display:block;font-size:14px;color:var(--muted);margin:12px 0 4px;}

/* ============ 开单 ============ */
.sale-customer{margin-bottom:10px;}
.sale-item{border:1px solid var(--border);border-radius:10px;padding:10px;margin-bottom:8px;display:flex;align-items:center;gap:8px;}
.sale-item .info{flex:1;min-width:0;}
.sale-item .info .nm{font-weight:500;}
.sale-item .info .sub{font-size:12px;color:var(--muted);}
.sale-item input{width:64px;text-align:center;padding:8px;}
.sale-total{position:sticky;bottom:0;background:#fff;border-top:1px solid var(--border);padding:12px;display:flex;align-items:center;justify-content:space-between;font-size:18px;font-weight:700;z-index:5;box-shadow:0 -2px 8px rgba(0,0,0,.05);}
.sale-total .amt{color:var(--danger);}
.search-result{max-height:220px;overflow-y:auto;}
.sale-item input[data-pi]{width:82px;padding:8px;}
.sale-item input[data-i]{width:60px;padding:8px;}

/* ============ 列表 ============ */
.list-item{background:var(--card);border-radius:10px;padding:12px;margin-bottom:8px;box-shadow:0 1px 3px rgba(0,0,0,.04);}
.list-item .top{display:flex;justify-content:space-between;align-items:center;gap:8px;}
.list-item .nm{font-weight:600;}
.list-item .meta{font-size:13px;color:var(--muted);margin-top:4px;}
.list-item.multi{display:flex;align-items:center;gap:10px;cursor:pointer;user-select:none;min-height:var(--tap);}
.list-item.multi input[type=checkbox]{width:20px;height:20px;min-width:20px;padding:0;margin:0;flex:none;border:none;background:none;accent-color:var(--primary);cursor:pointer;}
.list-item.multi .top{align-items:flex-start;}
.list-item.sel{box-shadow:0 0 0 2px var(--primary) inset;background:#f2fbf6;}
.btn-sm[disabled]{opacity:.45;cursor:not-allowed;}
mark{background:#fff2a8;color:inherit;padding:0 1px;border-radius:2px;}
.low{color:var(--danger);font-weight:600;}
.pill{display:inline-block;padding:2px 9px;border-radius:10px;font-size:12px;background:var(--primary-soft);color:var(--primary);}

/* ============ 弹窗 ============ */
.overlay{position:fixed;inset:0;background:rgba(0,0,0,.45);display:flex;align-items:center;justify-content:center;z-index:50;padding:16px;}
.modal{background:#fff;border-radius:14px;width:100%;max-width:420px;max-height:86vh;display:flex;flex-direction:column;}
.modal-head{display:flex;justify-content:space-between;align-items:center;padding:14px 16px;border-bottom:1px solid var(--border);font-weight:600;min-height:var(--tap);}
.modal-body{padding:8px 16px 16px;overflow-y:auto;-webkit-overflow-scrolling:touch;}

/* ============ 小票 ============ */
.print-wrap{background:#fff;border-radius:10px;max-width:340px;width:100%;padding:12px;max-height:90vh;overflow-y:auto;}
.receipt{width:80mm;max-width:100%;margin:0 auto;font-family:"Courier New",monospace;font-size:13px;color:#000;background:#fff;padding:6px 2px;}
.receipt .center{text-align:center;}
.receipt .line{display:flex;justify-content:space-between;}
.receipt .sep{border-top:1px dashed #000;margin:6px 0;}
.receipt .small{font-size:11px;}
.overlay-actions{display:flex;gap:10px;margin-top:12px;}
.overlay-actions .btn-primary{flex:1;margin-top:0;}

/* ============ toast ============ */
.toast{position:fixed;left:50%;top:40%;transform:translateX(-50%);background:rgba(0,0,0,.8);color:#fff;padding:10px 18px;border-radius:8px;z-index:99;font-size:14px;}

/* ============ 商品表格(桌面) ============ */
.erp-toolbar{display:flex;flex-wrap:wrap;gap:8px;align-items:center;margin-bottom:10px;}
.erp-toolbar input{flex:1;min-width:150px;}
.erp-tools{display:flex;gap:6px;flex-wrap:wrap;}
.erp-table{background:var(--card);border-radius:12px;overflow:hidden;box-shadow:0 1px 3px rgba(0,0,0,.04);}
.erp-scroll{overflow-x:auto;}
.erp-thead,.erp-row{display:grid;grid-template-columns:1.1fr 2fr 1.7fr 1fr .8fr 1.5fr;gap:6px;align-items:center;padding:10px 12px;}
.erp-thead{background:#f7f8fa;font-size:12px;font-weight:600;color:#666;border-bottom:1px solid var(--border);}
.erp-row{border-bottom:1px solid #f4f4f4;font-size:13px;}
.erp-row:last-child{border-bottom:none;}
.erp-row .c-name{font-weight:600;}
.erp-row .c-qty{font-weight:700;color:var(--primary);}
.erp-row .c-qty.low{color:var(--danger);}
.erp-row .c-act{display:flex;gap:4px;}
.erp-row .c-act .btn-sm{padding:7px 10px;font-size:12px;min-height:34px;}
.c-check{display:none;align-items:center;justify-content:center;}
.erp-table.multi .c-check{display:flex;}
.erp-table.multi .erp-thead,.erp-table.multi .erp-row{grid-template-columns:30px 1.1fr 2fr 1.7fr 1fr .8fr 1.5fr;}
.erp-row.sel{background:#eef4ff;}
.batch-bar{display:flex;align-items:center;gap:10px;padding:8px 12px;background:#f7f8fa;border:1px solid var(--border);border-top:none;font-size:13px;}
.batch-bar .spacer{flex:1;}
.sel-all{display:flex;align-items:center;gap:6px;cursor:pointer;}

/* 数据分析表格 */
.tbl{width:100%;border-collapse:collapse;font-size:13px;}
.tbl th,.tbl td{padding:8px 10px;border-bottom:1px solid var(--border);white-space:nowrap;}
.tbl thead th{background:#f7f8fa;color:#666;font-weight:600;font-size:12px;}
.tbl tbody tr:hover{background:#fafbfc;}

/* ============ 移动端底部导航（桌面隐藏） ============ */
.mobile-nav{display:none;}
/* 桌面端隐藏时也脱离文档流，避免任何潜在高度影响 */
@media (min-width:769px){
  .mobile-nav{display:none !important;position:absolute !important;height:0 !important;overflow:hidden !important;}
}

/* ============================================================
   移动端优化 (≤768px)：侧栏转底部Tab，表格转卡片
   ============================================================ */
@media (max-width:768px){
  /* 侧栏隐藏，改用底部 Tab */
  .sidebar{display:none !important;}

  #app-view{flex-direction:column;height:100vh;}

  .main{flex:1;min-height:0;min-width:0;}

  /* 顶栏：固定高度 + 安全区 */
  .topbar{
    padding:10px 14px;
    padding-top:calc(10px + var(--sat));
    padding-left:calc(14px + var(--sal));
    padding-right:calc(14px + var(--sar));
    font-size:15px;flex:none;background:#fff;
    box-shadow:0 1px 4px rgba(0,0,0,.05);z-index:10;
  }
  .topbar #today-stat{font-size:13px;}

  /* 内容区：为底部导航留出空间 */
  #page{
    padding:12px 12px calc(66px + var(--sab));
    -webkit-overflow-scrolling:touch;
  }
  .page-wrap{max-width:100%;}

  /* 卡片圆角/阴影更明显（移动端质感） */
  .card,.list-item,.collapse-sec{border-radius:14px;box-shadow:0 1px 4px rgba(0,0,0,.05);}

  /* 底部 Tab 导航（fixed 脱离文档流，不占 flex 布局高度） */
  .mobile-nav{
    display:flex;position:fixed;left:0;right:0;bottom:0;z-index:40;
    width:100%;
    background:rgba(255,255,255,.97);
    backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
    border-top:1px solid var(--border);
    padding-bottom:var(--sab);
    box-shadow:0 -2px 12px rgba(0,0,0,.06);
    flex:none;
  }
  .mobile-nav button{
    flex:1 1 0;min-width:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;
    min-height:56px;border:none;background:none;cursor:pointer;
    color:var(--muted);font-size:11px;padding:6px 2px;position:relative;
    -webkit-transition:color .15s;
  }
  .mobile-nav button .ti{font-size:21px;line-height:1;transition:transform .15s;}
  .mobile-nav button .tl{font-weight:500;}
  .mobile-nav button.active{color:var(--primary);}
  .mobile-nav button.active .ti{transform:scale(1.12);}
  .mobile-nav button.active::before{
    content:'';position:absolute;top:0;left:50%;transform:translateX(-50%);
    width:26px;height:3px;border-radius:0 0 3px 3px;background:var(--primary);
  }
  .mobile-nav button:active{background:rgba(7,193,96,.06);}

  /* 按钮触控加大 */
  .btn-sm{min-height:var(--tap);padding:12px 16px;font-size:15px;border-radius:10px;}
  .btn-sm.gray{background:#f0f0f0;}
  .btn-primary{border-radius:12px;}

  /* 列表项加大点击区 */
  .list-item{padding:14px;margin-bottom:10px;}
  .list-item .nm{font-size:15px;}
  .list-item .meta{font-size:13px;}

  /* 商品表格 → 卡片式 */
  .erp-scroll{overflow-x:visible;}
  .erp-thead{display:none !important;}          /* 隐藏表头 */
  .erp-table{background:transparent;box-shadow:none;border-radius:0;}
  .erp-row{
    grid-template-columns:1fr 1fr !important;   /* 两列布局 */
    grid-template-areas:
      "name  name"
      "meta  qty"
      "act   act";
    gap:6px 10px;padding:14px;margin-bottom:10px;
    background:var(--card);border-radius:14px;border:1px solid var(--border);
    box-shadow:0 1px 4px rgba(0,0,0,.05);
    position:relative;
  }
  .erp-row:last-child{border-bottom:1px solid var(--border);}
  .erp-row .c-code{grid-area:meta;}
  .erp-row .c-name{grid-area:name;font-size:15px;font-weight:600;}
  .erp-row .c-qty{grid-area:qty;text-align:right;font-size:15px;}
  .erp-row .c-act{grid-area:act;flex-wrap:wrap;gap:8px;padding-top:8px;border-top:1px dashed var(--border);margin-top:4px;}
  .erp-row .c-act .btn-sm{flex:1;min-width:72px;min-height:var(--tap);padding:12px;font-size:14px;}
  /* 卡片左上角勾选框 */
  .c-check{
    position:absolute;top:12px;right:12px;
  }
  .erp-table.multi .c-check{display:flex !important;}
  .erp-table.multi .erp-row{grid-template-columns:1fr 1fr !important;}

  /* 批量操作栏吸底 */
  .batch-bar{
    position:sticky;bottom:calc(8px + var(--sab));z-index:20;
    border-radius:12px;border:1px solid var(--border);
    box-shadow:0 4px 16px rgba(0,0,0,.12);
    padding:10px 12px;flex-wrap:wrap;
  }
  .batch-bar .btn-sm{min-height:40px;}

  /* 开单行优化 */
  .sale-item{flex-wrap:wrap;padding:12px;}
  .sale-item .info{flex:1 1 100%;margin-bottom:4px;}
  .sale-item input[data-pi]{flex:1;width:auto;min-height:var(--tap);}
  .sale-item input[data-i]{flex:1;width:auto;min-height:var(--tap);}
  .sale-total{
    bottom:calc(66px + var(--sab));
    padding:14px;font-size:19px;
    border-radius:14px 14px 0 0;margin:0 -12px;
  }

  /* 弹窗贴底（更符合移动端习惯） */
  .overlay{padding:0;align-items:flex-end;}
  .modal{
    max-width:100%;border-radius:18px 18px 0 0;
    max-height:92vh;padding-bottom:var(--sab);
    animation:slideUp .22s ease;
  }
  @keyframes slideUp{from{transform:translateY(30px);opacity:.6}to{transform:translateY(0);opacity:1}}
  .modal-body{padding-bottom:calc(16px + var(--sab));}

  /* 表单控件加大 */
  input,select{padding:13px;border-radius:10px;}

  /* toast 下移避开底部导航 */
  .toast{bottom:calc(90px + var(--sab));top:auto;transform:translateX(-50%);}

  /* 数据分析表格可横向滚动 */
  .tbl{display:block;overflow-x:auto;white-space:nowrap;}

  /* 打印预览在小屏直接铺满 */
  .print-wrap{max-width:100%;border-radius:0;max-height:94vh;}
  .overlay-actions{flex-wrap:wrap;}
  .overlay-actions .btn-primary{min-width:44%;}

  /* 登录卡片 */
  .login-card{padding:28px 22px;border-radius:18px;}
  #login-view{padding:calc(20px + var(--sat)) 16px calc(20px + var(--sab));}
}

/* 超小屏 (≤360px) 进一步压缩 */
@media (max-width:360px){
  .mobile-nav button .tl{font-size:10px;}
  .mobile-nav button .ti{font-size:19px;}
  #page{padding:10px 10px calc(64px + var(--sab));}
  .erp-row{padding:12px;}
}

/* 横屏时压缩顶部留白 */
@media (max-width:768px) and (orientation:landscape){
  .topbar{padding-top:calc(6px + var(--sat));padding-bottom:6px;}
  .mobile-nav button{min-height:42px;}
  .mobile-nav button .ti{font-size:18px;}
}

/* 减少动画偏好 */
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.01ms !important;transition-duration:.01ms !important;}
}

@media print{
  body *{visibility:hidden !important;}
  .print-overlay,.print-overlay *{visibility:visible !important;}
  .print-overlay{position:absolute;inset:0;background:#fff;padding:0;display:block;overflow:visible;}
  .print-wrap{box-shadow:none;max-width:80mm;margin:0;padding:0;border-radius:0;}
  .overlay-actions{display:none !important;}
  .receipt{width:80mm;}
  .mobile-nav,.topbar,.sidebar{display:none !important;}
}