:root{
  --bg:#f3f4f6; --card:#fff; --text:#15181d; --muted:#8b929e; --line:#e9ebef;
  --primary:#2563eb; --red:#d93f3f; --green:#12946a; --amber:#c47d09;
  --radius:14px;
}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{margin:0;padding:0;background:var(--bg);color:var(--text);
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  font-size:15px;line-height:1.5;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
#app{max-width:560px;margin:0 auto;padding-bottom:calc(76px + env(safe-area-inset-bottom))}

/* header */
.hd{position:sticky;top:0;z-index:20;background:#fff;
  border-bottom:1px solid var(--line);padding:14px 16px 12px;display:flex;align-items:center;gap:10px}
.hd h1{font-size:17px;margin:0;font-weight:650;letter-spacing:.2px}
.hd .sub{font-size:12px;color:var(--muted);margin-left:auto}
.hd .back{width:32px;height:32px;display:flex;align-items:center;justify-content:center;
  margin-left:-6px;border-radius:9px;font-size:21px;color:#333;border:0;background:transparent;
  font-family:inherit;padding:0;line-height:1}
.hd .back:active{background:#f0f1f3}
.wrap{padding:14px 16px}

/* cards */
.card{background:var(--card);border-radius:var(--radius);padding:14px 16px;margin-bottom:12px;
  box-shadow:0 1px 2px rgba(16,24,40,.04)}
.card.tight{padding:0;overflow:hidden}
.row{display:flex;align-items:center;gap:10px}
.between{justify-content:space-between}
.big-num{font-size:23px;font-weight:700;letter-spacing:-.3px;font-variant-numeric:tabular-nums}
.label{font-size:12px;color:var(--muted);margin-bottom:4px}
.muted{color:var(--muted)}
.small{font-size:12.5px}
.strong{font-weight:650}
.num{font-variant-numeric:tabular-nums}
.red{color:var(--red)} .green{color:var(--green)} .amber{color:var(--amber)} .blue{color:var(--primary)}

/* top summary */
.summary{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-bottom:12px}
.summary .card{margin:0;padding:13px 14px}
.summary .big-num{font-size:20px}

/* list items */
.item{display:flex;align-items:center;gap:12px;padding:13px 16px;border-bottom:1px solid var(--line)}
.item:last-child{border-bottom:none}
.item:active{background:#fafbfc}
.item .grow{flex:1;min-width:0}
.item .t1{font-size:14.5px;font-weight:560;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.item .t2{font-size:12px;color:var(--muted);margin-top:2px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.item .right{text-align:right;flex-shrink:0}
.item .amt{font-size:15px;font-weight:640;font-variant-numeric:tabular-nums}
.item .st{font-size:11.5px;margin-top:2px}

.chip{display:inline-block;font-size:11.5px;padding:2px 7px;border-radius:6px;background:#f1f3f6;color:#5b6371;font-weight:500}
.chip.sale{background:#eaf1ff;color:#1d4ed8}
.chip.purchase{background:#fff2e6;color:#a85a06}
.chip.done{background:#e6f6ef;color:#0f7a52}
.chip.open{background:#fdecec;color:#b93434}

/* segmented */
.seg{display:flex;background:#e9ebef;border-radius:10px;padding:3px;margin:0 16px 12px}
.seg button{flex:1;border:0;background:transparent;padding:7px 0;border-radius:8px;font-size:13.5px;color:#5b6371;font-weight:560}
.seg button.on{background:#fff;color:var(--text);box-shadow:0 1px 3px rgba(16,24,40,.1)}

/* forms */
.field{margin-bottom:14px}
.field > label{display:block;font-size:12.5px;color:#6b7280;margin-bottom:6px;font-weight:520}
input,select,textarea{width:100%;border:1px solid var(--line);background:#fafbfc;border-radius:10px;
  padding:11px 12px;font-size:15px;color:var(--text);font-family:inherit;outline:none;appearance:none}
input:focus,select:focus,textarea:focus{border-color:#9db8f5;background:#fff}
select{background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='12' height='8'><path d='M1 1l5 5 5-5' fill='none' stroke='%2390999f' stroke-width='1.6'/></svg>");
  background-repeat:no-repeat;background-position:right 13px center;padding-right:32px}
.btn{display:block;width:100%;border:0;border-radius:12px;padding:13px;font-size:15.5px;font-weight:620;
  background:var(--primary);color:#fff;font-family:inherit}
.btn:active{opacity:.85}
.btn.ghost{background:#eef1f5;color:#333}
.btn.danger{background:#fdecec;color:#b93434}
.btn:disabled{opacity:.5}
.btn-row{display:flex;gap:10px;margin-top:18px}
.btn-row .btn{flex:1}

/* lines editor */
.lines{border:1px solid var(--line);border-radius:12px;overflow:hidden;background:#fff}
.line-row{display:grid;grid-template-columns:1fr 62px 84px 26px;gap:6px;padding:9px 10px;border-bottom:1px solid var(--line);align-items:center}
.line-row:last-child{border-bottom:none}
.line-row select,.line-row input{padding:8px 8px;font-size:13.5px;border-radius:8px}
.line-row .del{border:0;background:transparent;color:#b6bcc6;font-size:18px;padding:0;line-height:1}
.line-head{display:grid;grid-template-columns:1fr 62px 84px 26px;gap:6px;padding:7px 10px;font-size:11.5px;color:var(--muted);background:#fafbfc}
.add-line{border:0;background:transparent;color:var(--primary);font-size:13.5px;padding:11px;width:100%;font-weight:560}

/* detail */
.kv{display:flex;justify-content:space-between;padding:9px 0;border-bottom:1px dashed #eef0f3;font-size:14px}
.kv:last-child{border-bottom:none}
.kv .k{color:var(--muted)}
.kv .v{font-weight:560;font-variant-numeric:tabular-nums}
.total-row{display:flex;justify-content:space-between;padding:13px 0 2px;font-size:16px;font-weight:700}
.timeline{position:relative;padding-left:16px}
.timeline:before{content:"";position:absolute;left:3px;top:6px;bottom:6px;width:2px;background:#eef0f3}
.tl-item{position:relative;padding:0 0 14px}
.tl-item:before{content:"";position:absolute;left:-17px;top:6px;width:8px;height:8px;border-radius:50%;background:#c9d2df;border:2px solid #fff}
.tl-item.on:before{background:var(--green)}

/* allocation rows */
.alloc{display:flex;align-items:center;gap:10px;padding:11px 0;border-bottom:1px dashed #eef0f3}
.alloc:last-child{border-bottom:none}
.alloc .grow{flex:1;min-width:0}
.alloc input{width:96px;text-align:right;padding:8px 9px;font-size:14px}
.alloc .ck{width:22px;height:22px;border-radius:6px;border:1.5px solid #cfd5de;flex-shrink:0;display:flex;
  align-items:center;justify-content:center;font-size:13px;color:#fff}
.alloc .ck.on{background:var(--primary);border-color:var(--primary)}

/* tabs */
#tabbar{position:fixed;left:0;right:0;bottom:0;z-index:30;display:flex;align-items:flex-end;justify-content:space-around;
  background:#fff;border-top:1px solid var(--line);
  padding:6px 0 calc(4px + env(safe-area-inset-bottom));max-width:560px;margin:0 auto}
#tabbar a{flex:1;text-align:center;font-size:10.5px;color:#9099a5;padding:4px 0 2px;display:flex;flex-direction:column;gap:2px}
#tabbar a .ico{font-size:17px;line-height:1}
#tabbar a.on{color:var(--primary)}
#fab{position:relative;top:-14px;width:52px;height:52px;border-radius:50%;border:0;background:var(--primary);color:#fff;
  font-size:26px;line-height:1;box-shadow:0 6px 16px rgba(37,99,235,.35);flex-shrink:0}
#fab:active{transform:scale(.96)}

/* sheet */
#sheet-mask{position:fixed;left:0;right:0;top:0;bottom:0;background:rgba(15,20,28,.42);z-index:50;
  display:flex;align-items:flex-end;overflow:hidden}
#sheet-mask.hidden{display:none}
#sheet{background:#fff;width:100%;max-width:560px;margin:0 auto;border-radius:18px 18px 0 0;
  max-height:90dvh;overflow-y:auto;overscroll-behavior:contain;-webkit-overflow-scrolling:touch;
  padding:8px 0 calc(14px + env(safe-area-inset-bottom));animation:up .18s ease}
@keyframes up{from{transform:translateY(24px);opacity:.6}to{transform:none;opacity:1}}
.sheet-title{font-size:13px;color:var(--muted);text-align:center;padding:10px 0 6px}
.sheet-item{display:flex;align-items:center;gap:12px;padding:15px 20px;font-size:15.5px;border-bottom:1px solid #f2f3f5}
.sheet-item:last-child{border-bottom:none}
.sheet-item .ic{width:32px;height:32px;border-radius:9px;display:flex;align-items:center;justify-content:center;font-size:15px}
.sheet-item .ic.sale{background:#eaf1ff;color:#1d4ed8}
.sheet-item .ic.purchase{background:#fff2e6;color:#a85a06}
.sheet-item .ic.in{background:#e6f6ef;color:#0f7a52}
.sheet-item .ic.out{background:#fdecec;color:#b93434}

/* toast */
#toast{position:fixed;left:50%;bottom:100px;transform:translateX(-50%);background:rgba(22,27,34,.92);color:#fff;
  padding:10px 16px;border-radius:10px;font-size:13.5px;z-index:80;max-width:80%;text-align:center}
#toast.hidden{display:none}

.empty{text-align:center;color:var(--muted);font-size:13.5px;padding:46px 20px}
.section-title{font-size:13px;color:var(--muted);font-weight:560;margin:18px 2px 8px;display:flex;justify-content:space-between}
.hint{font-size:12px;color:var(--muted);margin-top:8px;line-height:1.55}
.bar{height:6px;border-radius:4px;background:#eef1f4;overflow:hidden;margin-top:8px}
.bar > i{display:block;height:100%;background:var(--primary)}

/* 新增：头部操作按钮 */
.hd-act{margin-left:auto}
.hd-btn{border:0;background:#eef4ff;color:var(--primary);font-size:13px;font-weight:600;
  padding:7px 12px;border-radius:9px;font-family:inherit}
.hd-btn:active{opacity:.75}

/* 选择按钮 */
.pick-btn{width:100%;display:flex;align-items:center;justify-content:space-between;gap:8px;
  border:1px solid var(--line);background:#fafbfc;border-radius:10px;padding:12px;font-size:15px;
  font-family:inherit;color:var(--text);text-align:left}
.pick-btn:active{background:#f2f4f7}
.pick-arrow{color:#b6bcc6;font-size:17px}
.prod-btn{border:1px solid var(--line);background:#fafbfc;border-radius:8px;padding:8px;
  font-size:13px;font-family:inherit;color:var(--text);text-align:left;
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.prod-btn.muted{color:var(--muted)}

/* chips */
.chip.prepay{background:#fff2e6;color:#a85a06}

/* 选择器 */
.pk-search{padding:0 16px 10px}
.pk-search input{background:#f2f4f7;border:1px solid transparent;border-radius:10px}
.pk-list{max-height:52vh;overflow-y:auto;-webkit-overflow-scrolling:touch}
.pk-item{padding:12px 20px;border-bottom:1px solid #f2f3f5}
.pk-item:active{background:#f7f8fa}
.pk-item .t1{font-size:15px}
.pk-item .t2{font-size:12px;color:var(--muted);margin-top:2px}
.pk-new{display:flex;align-items:center;gap:8px;padding:14px 20px;color:var(--primary);
  font-size:14.5px;font-weight:560;border-top:1px solid var(--line)}
.pk-plus{width:22px;height:22px;border-radius:6px;background:#eef4ff;display:flex;
  align-items:center;justify-content:center;font-size:14px}

/* 表单 sheet */
.form-sheet{padding:6px 18px 20px;max-height:none;overflow:visible}
.form-sheet .field:last-of-type{margin-bottom:0}

/* 选择器空状态提示 */
.pk-tip{padding:26px 20px;text-align:center;color:var(--muted);font-size:13px;line-height:1.7}
.pk-arrow{color:#c3c9d2;font-size:16px;flex-shrink:0}

/* 批次归档 */
.chip.closed{background:#f1f2f4;color:#8b929e}
.pk-toggle{padding:12px 20px;text-align:center;font-size:13px;color:#6b7280;border-top:1px solid #f2f3f5}
.pk-toggle.on{color:var(--primary);font-weight:560}
.mini-btn{border:1px solid var(--line);background:#fff;color:#5b6371;font-size:12px;padding:6px 10px;
  border-radius:8px;font-family:inherit;flex-shrink:0}
.mini-btn.on{background:#eef4ff;border-color:#cfe0ff;color:var(--primary)}

/* 拆分采购 */
.split-line{display:grid;grid-template-columns:1fr 76px 76px 22px;gap:6px;align-items:center;padding:7px 0;border-bottom:1px dashed #eef0f3}
.split-line:last-child{border-bottom:none}
.split-line input{padding:8px;font-size:13.5px;border-radius:8px}
.split-name{font-size:13px;color:#5b6371;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.split-line .del{border:0;background:transparent;color:#b6bcc6;font-size:17px;padding:0}