:root{
  --brand:#1677ff; --brand-dark:#0958d9; --brand-soft:#e8f1ff;
  --bg:#f4f6f9; --card:#fff; --line:#e9edf3;
  --text:#1d2129; --text-2:#4e5969; --text-3:#86909c;
  --ok:#00b42a; --ok-soft:#e8ffea;
  --warn:#ff7d00; --warn-soft:#fff7e8;
  --danger:#f53f3f; --danger-soft:#ffece8;
  --info:#86909c; --info-soft:#f2f3f5;
  --r:12px; --shadow:0 1px 3px rgba(0,0,0,.05),0 4px 16px rgba(0,0,0,.04);
}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{margin:0;padding:0}
body{
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Helvetica Neue","Microsoft YaHei",sans-serif;
  background:var(--bg);color:var(--text);font-size:15px;line-height:1.6;
}
.mask{position:fixed;inset:0;background:var(--bg);display:flex;flex-direction:column;
  align-items:center;justify-content:center;gap:14px;z-index:99}
.mask p{margin:0;color:var(--text-3);font-size:14px}
.spin{width:30px;height:30px;border:3px solid var(--brand-soft);border-top-color:var(--brand);
  border-radius:50%;animation:sp .8s linear infinite}
@keyframes sp{to{transform:rotate(360deg)}}

.topbar{position:sticky;top:0;z-index:20;background:linear-gradient(135deg,var(--brand),#3c8bff);
  color:#fff;padding:14px 16px calc(14px + env(safe-area-inset-top,0px));padding-top:calc(14px + env(safe-area-inset-top,0px));
  display:flex;align-items:center;justify-content:space-between;box-shadow:0 2px 8px rgba(22,119,255,.18)}
.topbar-left{display:flex;align-items:center;gap:10px}
.logo{width:34px;height:34px;border-radius:9px;background:rgba(255,255,255,.22);
  display:flex;align-items:center;justify-content:center;font-weight:700;font-size:16px}
.topbar-title{font-size:17px;font-weight:600;line-height:1.2}
.topbar-sub{font-size:12px;opacity:.85;line-height:1.3}
.topbar-right{font-size:12px;text-align:right;opacity:.95}

.page{padding:14px 14px calc(28px + env(safe-area-inset-bottom,0px));max-width:900px;margin:0 auto}
.card{background:var(--card);border-radius:var(--r);box-shadow:var(--shadow);
  padding:16px;margin-bottom:14px}
.card-hd{margin-bottom:14px}
.card-hd.row{display:flex;align-items:center;justify-content:space-between;gap:10px;flex-wrap:wrap}
.card-hd h2{margin:0;font-size:16px;font-weight:600}
.muted{color:var(--text-3);font-size:13px;margin:4px 0 0}

.field{margin-bottom:16px}
.field label{display:block;font-size:14px;font-weight:500;margin-bottom:7px;color:var(--text-2)}
.req{color:var(--danger)}
textarea,input[type=date],input[type=time],input[type=search],select{
  width:100%;padding:11px 12px;border:1px solid var(--line);border-radius:9px;
  font-size:15px;font-family:inherit;background:#fbfcfe;color:var(--text);outline:none;
  transition:border-color .15s,box-shadow .15s}
textarea{min-height:120px;resize:vertical;line-height:1.65}
input:focus,textarea:focus,select:focus{border-color:var(--brand);
  box-shadow:0 0 0 3px rgba(22,119,255,.1);background:#fff}
.counter{text-align:right;font-size:12px;color:var(--text-3);margin-top:4px}
.due-row{display:flex;gap:10px}
.due-row input{flex:1}
.quick-due{display:flex;gap:8px;margin-top:9px;flex-wrap:wrap}
.chip{padding:5px 12px;border:1px solid var(--line);background:#fff;border-radius:999px;
  font-size:13px;color:var(--text-2);cursor:pointer;transition:.15s}
.chip:active{transform:scale(.96)}
.chip:hover{border-color:var(--brand);color:var(--brand)}

.notice{background:var(--brand-soft);border-left:3px solid var(--brand);padding:10px 12px;
  border-radius:7px;font-size:13px;color:var(--text-2);margin-bottom:14px;line-height:1.7}

.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;
  padding:11px 20px;border-radius:9px;border:1px solid transparent;font-size:15px;
  font-weight:500;cursor:pointer;font-family:inherit;transition:.15s}
.btn.block{width:100%;margin-top:4px}
.btn.primary{background:var(--brand);color:#fff}
.btn.primary:active{background:var(--brand-dark)}
.btn.ghost{background:#fff;color:var(--text-2);border-color:var(--line);margin-top:9px}
.btn:disabled{opacity:.55;cursor:not-allowed}

.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:9px;margin-bottom:14px}
.stat{background:var(--card);border-radius:10px;padding:12px 8px;text-align:center;
  box-shadow:var(--shadow)}
.stat b{display:block;font-size:22px;font-weight:700;line-height:1.25}
.stat span{font-size:12px;color:var(--text-3)}
.stat.pending b{color:var(--warn)} .stat.assigned b{color:var(--brand)}
.stat.done b{color:var(--ok)} .stat.overdue b{color:var(--danger)}

.filters{display:flex;gap:8px}
.filters select,.filters input{padding:7px 10px;font-size:13px;width:auto}
.filters input{min-width:150px}

.table-wrap{overflow-x:auto;-webkit-overflow-scrolling:touch}
table{width:100%;border-collapse:collapse;font-size:13px;min-width:640px}
th{text-align:left;padding:9px 10px;background:#fafbfc;color:var(--text-3);
  font-weight:500;font-size:12px;white-space:nowrap;border-bottom:1px solid var(--line)}
td{padding:11px 10px;border-bottom:1px solid var(--line);vertical-align:top}
tr:last-child td{border-bottom:none}
tr.row-link{cursor:pointer}
tr.row-link:hover td{background:#fafbfc}
.cell-content{max-width:260px}
.cell-content .txt{display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;
  overflow:hidden;word-break:break-word}
.nowrap{white-space:nowrap}
.empty{text-align:center;padding:34px 12px;color:var(--text-3);font-size:14px}
.empty-icon{font-size:30px;display:block;margin-bottom:8px;opacity:.5}

.tag{display:inline-block;padding:2px 9px;border-radius:999px;font-size:12px;
  font-weight:500;white-space:nowrap}
.tag.pending{background:var(--warn-soft);color:var(--warn)}
.tag.assigned{background:var(--brand-soft);color:var(--brand)}
.tag.done{background:var(--ok-soft);color:var(--ok)}
.tag.overdue{background:var(--danger-soft);color:var(--danger)}

.list .item{border-bottom:1px solid var(--line);padding:12px 2px;cursor:pointer}
.list .item:last-child{border-bottom:none}
.list .item:active{background:#fafbfc}
.item-hd{display:flex;align-items:center;justify-content:space-between;gap:8px}
.item-seq{font-size:12px;color:var(--text-3);font-family:ui-monospace,monospace}
.item-body{margin-top:5px;font-size:14px;color:var(--text-2);display:-webkit-box;
  -webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.item-ft{margin-top:6px;font-size:12px;color:var(--text-3);display:flex;gap:12px;flex-wrap:wrap}

.detail-title{display:flex;align-items:center;justify-content:space-between;gap:10px;
  margin-bottom:12px;flex-wrap:wrap}
.detail-title h2{margin:0;font-size:17px}
.kv{display:grid;grid-template-columns:76px 1fr;gap:9px 12px;font-size:14px;margin-bottom:14px}
.kv dt{color:var(--text-3);font-size:13px}
.kv dd{margin:0;word-break:break-word}
.content-box{background:#fafbfc;border:1px solid var(--line);border-radius:9px;
  padding:12px;white-space:pre-wrap;word-break:break-word;font-size:14px;line-height:1.7}

.timeline{margin:0;padding:0;list-style:none}
.timeline li{position:relative;padding:0 0 16px 20px;border-left:2px solid var(--line)}
.timeline li:last-child{border-left-color:transparent;padding-bottom:0}
.timeline li::before{content:'';position:absolute;left:-6px;top:5px;width:10px;height:10px;
  border-radius:50%;background:var(--brand);border:2px solid #fff}
.timeline .t-act{font-size:14px;font-weight:500}
.timeline .t-meta{font-size:12px;color:var(--text-3);margin-top:2px}
.timeline .t-detail{font-size:13px;color:var(--text-2);margin-top:3px;word-break:break-word}

.assign-card{text-align:center;padding:34px 18px}
.assign-icon{font-size:44px;margin-bottom:8px}
.assign-card h2{margin:0 0 12px;font-size:18px}
.assign-body{background:#fafbfc;border:1px solid var(--line);border-radius:10px;
  padding:14px;text-align:left;margin-bottom:18px;font-size:14px;line-height:1.8}

.err-card{text-align:center;padding:34px 18px}
.err-icon{font-size:40px;margin-bottom:8px}
.err-body{background:#fafbfc;border:1px solid var(--line);border-radius:9px;padding:12px;
  text-align:left;white-space:pre-wrap;word-break:break-word;font-size:13px;
  color:var(--text-2);font-family:inherit}

.toast{position:fixed;left:50%;top:50%;transform:translate(-50%,-50%);
  background:rgba(0,0,0,.82);color:#fff;padding:11px 20px;border-radius:9px;
  font-size:14px;z-index:200;max-width:80%;text-align:center;line-height:1.6}

@media(max-width:600px){
  .stats{grid-template-columns:repeat(2,1fr)}
  .card-hd.row{flex-direction:column;align-items:stretch}
  .filters{width:100%}
  .filters input{flex:1;min-width:0}
}