:root {
  --primary: #2E7AF7;
  --primary-dark: #1E63D6;
  --bg: #F4F6FA;
  --card: #FFFFFF;
  --text: #1D2433;
  --muted: #7A8499;
  --line: #E5E9F2;
  --danger: #D64545;
  --ok: #2E9E5B;
  --warn: #C97A16;
  --radius: 12px;
}

* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }

/* hidden 属性必须真正隐藏，避免被 .login{display:flex} 之类规则覆盖 */
[hidden] { display: none !important; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 15px/1.5 -apple-system, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
}

button { font: inherit; cursor: pointer; }
input, select { font: inherit; color: var(--text); }

.login {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px 18px calc(24px + env(safe-area-inset-bottom));
}

.login-card {
  width: 100%;
  max-width: 380px;
  background: var(--card);
  border-radius: var(--radius);
  padding: 28px 22px 22px;
  box-shadow: 0 8px 28px rgba(29, 36, 51, .08);
}

.logo {
  width: 46px; height: 46px;
  border-radius: 11px;
  background: var(--primary);
  color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-size: 22px; font-weight: 700;
}

.login-card h1 { font-size: 20px; margin: 14px 0 4px; }
.muted { color: var(--muted); margin: 0 0 18px; }
.login-card label { display: block; margin-bottom: 12px; font-size: 13px; color: var(--muted); }
.login-card input {
  display: block; width: 100%; margin-top: 6px;
  padding: 11px 12px;
  border: 1px solid var(--line);
  border-radius: 9px;
  background: #FBFCFE;
  outline: none;
}
.login-card input:focus { border-color: var(--primary); background: #fff; }

.btn {
  border: 1px solid var(--line);
  background: var(--card);
  color: var(--text);
  border-radius: 9px;
  padding: 10px 14px;
}
.btn.primary { background: var(--primary); border-color: var(--primary); color: #fff; width: 100%; }
.btn.primary:disabled { opacity: .6; }
.btn.sm { padding: 6px 10px; font-size: 13px; }
.btn.danger { color: var(--danger); border-color: #F3C9C9; background: #FFF7F7; }

.err { color: var(--danger); font-size: 13px; min-height: 18px; margin: 10px 0 0; }

.app { min-height: 100vh; padding-bottom: calc(62px + env(safe-area-inset-bottom)); }

.topbar {
  position: sticky; top: 0; z-index: 10;
  display: flex; align-items: center; justify-content: space-between;
  padding: 12px 16px;
  background: var(--primary);
  color: #fff;
}
.brand { font-weight: 600; letter-spacing: .3px; }
.chip {
  background: rgba(255, 255, 255, .18);
  border: 1px solid rgba(255, 255, 255, .35);
  color: #fff;
  border-radius: 999px;
  padding: 5px 12px;
  font-size: 13px;
  max-width: 46vw;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}

.content { padding: 14px 14px 22px; max-width: 760px; margin: 0 auto; }

.card {
  background: var(--card);
  border-radius: var(--radius);
  padding: 16px;
  margin-bottom: 12px;
  box-shadow: 0 2px 10px rgba(29, 36, 51, .04);
}
.card h2 { font-size: 15px; margin: 0 0 12px; }
.card h3 { font-size: 14px; margin: 0 0 8px; color: var(--muted); font-weight: 600; }

.metrics { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.metric { background: var(--card); border-radius: var(--radius); padding: 14px; }
.metric .k { font-size: 12px; color: var(--muted); }
.metric .v { font-size: 20px; font-weight: 700; margin-top: 4px; font-variant-numeric: tabular-nums; }
.metric .v.small { font-size: 17px; }
.metric .v.danger { color: var(--danger); }
.metric .v.ok { color: var(--ok); }

.row { display: flex; gap: 8px; align-items: center; }
.row > * { min-width: 0; }
.search { flex: 1; display: flex; gap: 8px; }
.search input {
  flex: 1; padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 9px; background: #FBFCFE; outline: none;
}
.search input:focus { border-color: var(--primary); background: #fff; }
.seg { display: flex; gap: 0; border: 1px solid var(--line); border-radius: 9px; overflow: hidden; }
.seg button { flex: 1; border: 0; background: #fff; padding: 8px 10px; font-size: 13px; color: var(--muted); }
.seg button.on { background: var(--primary); color: #fff; }

.filters { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 10px; }
.filters select, .filters input[type=date] {
  padding: 8px 10px; border: 1px solid var(--line); border-radius: 9px;
  background: #FBFCFE; font-size: 13px;
}

.list { margin-top: 10px; }
.item {
  display: block; width: 100%; text-align: left;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 12px 14px;
  margin-bottom: 8px;
}
.item .l1 { display: flex; justify-content: space-between; gap: 10px; }
.item .name { font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.item .amt { font-variant-numeric: tabular-nums; font-weight: 600; white-space: nowrap; }
.item .l2 { display: flex; justify-content: space-between; gap: 10px; margin-top: 4px; font-size: 12px; color: var(--muted); }
.badge { font-size: 11px; padding: 1px 7px; border-radius: 999px; border: 1px solid var(--line); color: var(--muted); }
.badge.draft { color: var(--warn); border-color: #F0D9B5; background: #FFF9F0; }
.badge.warn { color: var(--warn); border-color: #F0D9B5; background: #FFF9F0; }
.badge.red { color: var(--danger); border-color: #F3C9C9; background: #FFF6F6; }
.badge.ok { color: var(--ok); border-color: #CDE9D8; background: #F4FBF6; }

.empty { color: var(--muted); text-align: center; padding: 26px 0; font-size: 14px; }

.tabs {
  position: fixed; left: 0; right: 0; bottom: 0; z-index: 10;
  display: flex; background: #fff; border-top: 1px solid var(--line);
  padding-bottom: env(safe-area-inset-bottom);
}
.tab {
  flex: 1; border: 0; background: none;
  min-height: 44px;
  padding: 10px 0;
  display: flex; align-items: center; justify-content: center;
  color: var(--muted); font-size: 12px;
}
.tab.active { color: var(--primary); font-weight: 600; }

.modal-mask {
  position: fixed; inset: 0; z-index: 50;
  background: rgba(20, 26, 38, .42);
  display: flex; align-items: flex-end; justify-content: center;
  padding: 0;
}
.sheet {
  width: 100%; max-width: 760px; max-height: 86vh;
  background: #fff; border-radius: 16px 16px 0 0;
  padding: 16px 16px calc(18px + env(safe-area-inset-bottom));
  overflow: auto;
}
.sheet-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 10px; margin-bottom: 12px; }
.sheet-head h2 { margin: 0; font-size: 16px; }
.sheet-head .x { border: 0; background: none; color: var(--muted); font-size: 22px; line-height: 1; padding: 0 4px; }
.line { display: flex; justify-content: space-between; gap: 12px; padding: 6px 0; border-bottom: 1px dashed var(--line); font-size: 14px; }
.line:last-child { border-bottom: 0; }
.line .k { color: var(--muted); }
.line .v { text-align: right; word-break: break-all; }

.acc { display: flex; align-items: center; justify-content: space-between; gap: 10px; padding: 12px 0; border-bottom: 1px solid var(--line); }
.acc:last-child { border-bottom: 0; }
.acc .meta { font-size: 12px; color: var(--muted); margin-top: 3px; }
.acc .on { color: var(--ok); font-size: 13px; }

.toast {
  position: fixed; left: 50%; bottom: calc(78px + env(safe-area-inset-bottom));
  transform: translateX(-50%);
  background: rgba(29, 36, 51, .92); color: #fff;
  padding: 9px 14px; border-radius: 999px; font-size: 13px; z-index: 80;
  max-width: 86vw;
}

.mt8 { margin-top: 8px; }
.mt12 { margin-top: 12px; }
.mt14 { margin-top: 14px; }
.mb12 { margin-bottom: 12px; }
.span2 { grid-column: 1 / -1; }

.item-actions { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 10px; }
.item-actions .btn.sm { min-height: 36px; }
.item-actions .btn[disabled] { opacity: .45; cursor: not-allowed; }

.matrix-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; margin-top: 8px; }
.matrix { border-collapse: collapse; font-size: 12px; min-width: 430px; width: 100%; }
.matrix th, .matrix td { padding: 6px 8px; border-bottom: 1px solid var(--line); text-align: center; white-space: nowrap; }
.matrix th:first-child, .matrix td:first-child { text-align: left; position: sticky; left: 0; background: var(--card); }
.matrix td.yes { color: var(--ok); font-weight: 600; }
.matrix td.no { color: #B7BECB; }
.mono { font-family: ui-monospace, Consolas, monospace; letter-spacing: .5px; }

.input {
  display: block; width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 9px;
  background: #FBFCFE;
  outline: none;
  margin-bottom: 8px;
}
.input:focus { border-color: var(--primary); background: #fff; }

.input-inline {
  flex: 1; min-width: 0;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 9px;
  background: #FBFCFE;
  outline: none;
}
.input-inline:focus { border-color: var(--primary); background: #fff; }

/* ------------------------------------------------ 开单（手机/电脑同一套） */
.page-head { display: flex; align-items: center; gap: 10px; margin: 2px 0 12px; }
.page-head h2 { font-size: 18px; margin: 0; }

.action-grid { display: grid; grid-template-columns: 1fr; gap: 10px; }
.action-card {
  display: flex; flex-direction: column; align-items: flex-start; gap: 4px;
  background: var(--card); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 15px 16px; text-align: left;
  box-shadow: 0 2px 10px rgba(29, 36, 51, .04);
}
.action-card b { font-size: 16px; color: var(--text); }
.action-card span { font-size: 12px; color: var(--muted); }
.action-card:active { border-color: var(--primary); }

.form-grid { display: grid; grid-template-columns: 1fr; gap: 10px; }
.form-grid label { display: flex; flex-direction: column; gap: 5px; font-size: 12px; color: var(--muted); }
.form-grid select, .form-grid input {
  width: 100%; padding: 10px 12px;
  border: 1px solid var(--line); border-radius: 9px;
  background: #FBFCFE; outline: none; font-size: 15px;
}
.form-grid select:focus, .form-grid input:focus { border-color: var(--primary); background: #fff; }

.line-head { display: none; }
.line-row {
  display: grid; grid-template-columns: 1fr 1fr; gap: 8px;
  border: 1px solid var(--line); border-radius: 10px;
  padding: 10px; margin-bottom: 8px; background: #FCFDFF;
}
.line-prod { grid-column: 1 / -1; display: flex; flex-wrap: wrap; gap: 6px; align-items: center; }
.line-prod .p-input { flex: 1; min-width: 0; }
.p-hint { width: 100%; font-size: 12px; color: var(--muted); min-height: 16px; }
.line-cell { display: flex; flex-direction: column; gap: 3px; }
.line-cell .m-label, .line-amt .m-label { font-size: 11px; color: var(--muted); }
.line-cell .input-inline { width: 100%; }
.p-unit { font-size: 11px; color: var(--muted); }
.line-amt { display: flex; flex-direction: column; gap: 3px; }
.line-amt b { font-variant-numeric: tabular-nums; }
.line-row .del { align-self: end; justify-self: end; }
.line-total { text-align: right; padding: 10px 2px 2px; font-size: 14px; }
.line-total b { font-size: 18px; }

/* 退货单：商品 / 本次数量 / 预计金额 */
.ret-row { grid-template-columns: 1fr 1fr; }
.ret-prod { grid-column: 1 / -1; display: flex; flex-direction: column; gap: 3px; }
.ret-prod b { font-size: 14px; }
.ret-hint { font-size: 12px; color: var(--muted); }
.ret-hint b { color: var(--text); font-variant-numeric: tabular-nums; }
.ret-note { margin: 8px 0 0; }
.ret-qty .input-inline { width: 100%; }
.form-actions { display: flex; flex-wrap: wrap; gap: 8px; justify-content: flex-end; }
.form-actions .btn.primary { min-width: 140px; }
.sheet-actions {
  display: flex; flex-wrap: wrap; gap: 8px; margin-top: 14px; padding-top: 12px;
  border-top: 1px solid var(--line); position: sticky; bottom: 0; background: #fff;
}

.st-row { grid-template-columns: 1fr 1fr; }
.st-name { display: block; font-size: 14px; }
.st-book { font-variant-numeric: tabular-nums; }
.st-diff { font-variant-numeric: tabular-nums; }
.st-diff.ok { color: var(--ok); }
.st-diff.danger { color: var(--danger); }

/* 账龄 / 核销 */
.aging-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.aging-cell {
  border: 1px solid var(--line); border-radius: 10px;
  padding: 10px 12px; background: #FCFDFF;
}
.aging-cell .k { font-size: 11px; color: var(--muted); }
.aging-cell .v { font-size: 16px; font-weight: 700; margin-top: 3px; font-variant-numeric: tabular-nums; }
.aging-cell .v.danger { color: var(--danger); }
.alloc-row {
  display: flex; gap: 8px; align-items: center;
  border: 1px solid var(--line); border-radius: 10px;
  padding: 10px; margin-bottom: 8px; background: #FCFDFF;
}
.alloc-doc { flex: 1; min-width: 0; display: flex; flex-direction: column; font-size: 12px; color: var(--muted); }
.alloc-doc b { font-size: 14px; color: var(--text); }
.alloc-amt { max-width: 116px; }
.chk { display: flex; align-items: center; gap: 8px; margin-top: 10px; font-size: 13px; }
.chk input { width: 18px; height: 18px; }
.line .v.ok { color: var(--ok); }
.line .v.danger { color: var(--danger); }

/* 费用分类维护 */
.cat-row {
  display: flex; flex-wrap: wrap; gap: 6px; align-items: center;
  padding: 8px 0; border-bottom: 1px dashed var(--line);
}
.cat-row .input-inline { flex: 1; min-width: 120px; }
.cat-add { display: flex; gap: 8px; margin-top: 10px; }
.cat-add .input-inline { flex: 1; }
.cat-add .btn.primary { width: auto; }
.line .muted { margin: 0; color: var(--muted); font-size: 12px; }

/* 手机端表单可用性：输入框/按钮不小于 44px，便于触控 */
@media (max-width: 899px) {
  .form-grid select, .form-grid input,
  .btn, .input, .input-inline, .search input, .filters select {
    min-height: 44px;
  }
  .item-actions .btn.sm, .line-row .del { min-height: 44px; }
  .sheet-form .form-actions .btn { flex: 1; }
}

@media (min-width: 900px) {
  .app { display: flex; flex-direction: column; min-height: 100vh; padding-bottom: 0; }
  .topbar { order: 1; }
  .tabs {
    order: 2; position: static; left: auto; right: auto; bottom: auto;
    width: 100%; max-width: 1120px; margin: 10px auto 0;
    border: 1px solid var(--line); border-radius: 12px; overflow: hidden;
  }
  .tab { min-height: 40px; padding: 9px 6px; font-size: 13px; }
  .tab.active { background: #EEF4FF; }
  .content {
    order: 3; flex: 1; width: 100%; max-width: 1120px;
    padding: 14px 18px 34px;
  }
  .metrics { grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); }
  .action-grid { grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); }
  .form-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px 16px; }
  .line-head {
    display: grid; grid-template-columns: minmax(220px, 2.2fr) 120px 120px 110px 48px;
    gap: 8px; font-size: 12px; color: var(--muted); padding: 0 10px 8px;
  }
  .line-row {
    grid-template-columns: minmax(220px, 2.2fr) 120px 120px 110px 48px;
    align-items: center; background: #fff;
  }
  .line-prod { grid-column: auto; flex-wrap: wrap; }
  .line-cell .m-label, .line-amt .m-label { display: none; }
  .p-unit { display: none; }
  .line-row .del { align-self: center; }
  .line-total { font-size: 15px; }
  .ret-row { grid-template-columns: minmax(220px, 2.2fr) 150px 140px; align-items: center; }
  .ret-head { grid-template-columns: minmax(220px, 2.2fr) 150px 140px; }
  .ret-prod { grid-column: auto; }
  .st-head { display: grid; grid-template-columns: minmax(240px, 2.2fr) 120px 130px 110px; }
  .st-row { grid-template-columns: minmax(240px, 2.2fr) 120px 130px 110px; }
  .st-row .m-label { display: none; }
  .aging-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}