/* 学习跟踪站 · 样式
   移动优先：底部标签栏 + 单列；≥1024px 切换成左侧导航 + 宽屏多列。
   视觉沿用学习看板的六域色，但排版、阴影、间距按网页端放宽。 */

:root{
  --bg:#f5f7fc;
  --card:#fff;
  --ink:#0f172a; --ink2:#334155; --muted:#64748b; --faint:#94a3b8;
  --line:#e2e8f0; --line2:#eef2f7;
  --brand:#4f46e5; --brand2:#7c3aed; --brand-soft:#eef2ff;
  --ok:#15803d; --ok-soft:#ecfdf3;
  --danger:#be123c; --danger-soft:#fff1f2;
  --radius:16px;
  --shadow-sm:0 1px 2px rgba(15,23,42,.05);
  --shadow:0 1px 2px rgba(15,23,42,.05), 0 10px 26px -18px rgba(15,23,42,.35);
  --shadow-lg:0 2px 6px rgba(15,23,42,.06), 0 24px 50px -30px rgba(15,23,42,.5);
  --dur:180ms;
  --sidenav:256px;
}

*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  color:var(--ink);
  font:15px/1.65 "PingFang SC","Microsoft YaHei",-apple-system,"Segoe UI",system-ui,sans-serif;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
  background:
    radial-gradient(1100px 460px at 15% -8%, #e6ebff 0%, rgba(230,235,255,0) 62%),
    linear-gradient(180deg,#f7f9fd 0%, #f2f5fb 45%, #eef2f9 100%);
  background-attachment:fixed;
}
h1,h2,p{margin:0}
[hidden]{display:none !important}
button{font-family:inherit}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:8px}

.view{min-height:100dvh}
#view-login{padding:24px 18px}
#view-login:not([hidden]){display:grid;place-items:center}

/* ==================== 主壳 ==================== */
.shell{display:block}

/* 移动端：底部标签栏 */
.sidenav{
  position:fixed;left:0;right:0;bottom:0;z-index:30;
  background:rgba(255,255,255,.94);
  backdrop-filter:blur(16px) saturate(160%);
  border-top:1px solid var(--line);
  padding:6px 10px calc(6px + env(safe-area-inset-bottom));
}
.sidenav .brand,.sidenav .sidenav-foot{display:none}
.nav{display:flex;gap:4px}
.tab{
  flex:1;display:flex;flex-direction:column;align-items:center;gap:3px;
  padding:8px 4px;border:0;border-radius:12px;background:transparent;
  color:var(--muted);font-size:11px;font-weight:600;cursor:pointer;
  transition:background var(--dur),color var(--dur);
}
.tab svg{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.tab.active{color:var(--brand);background:var(--brand-soft)}

.main{min-width:0}

/* 顶栏（手机上随页面滚走，给状态切换条让出吸顶位置；桌面恢复吸顶） */
.appbar{
  position:relative;z-index:20;
  display:flex;align-items:center;justify-content:space-between;gap:14px;
  padding:18px 18px 12px;
  background:linear-gradient(180deg,rgba(247,249,253,.97) 60%,rgba(247,249,253,.72) 100%);
  backdrop-filter:blur(10px);
}
.eyebrow{font-size:12px;color:var(--muted);letter-spacing:.4px}
.appbar h1{font-size:23px;letter-spacing:-.6px;margin-top:2px}
.appbar-r{display:flex;align-items:center;gap:10px}
.live{display:none;align-items:center;gap:6px;font-size:12px;color:var(--muted)}
.live i{width:7px;height:7px;border-radius:50%;background:#22c55e;box-shadow:0 0 0 3px rgba(34,197,94,.16)}

.content{padding:0 18px calc(92px + env(safe-area-inset-bottom))}

/* ==================== 登录 ==================== */
.login-card{
  width:100%;max-width:392px;background:var(--card);
  border:1px solid var(--line);border-radius:24px;
  padding:32px 26px 26px;box-shadow:var(--shadow-lg);
  text-align:center;
}
.login-card h1{font-size:22px;letter-spacing:-.4px;margin-top:14px}
.login-card .sub{color:var(--muted);font-size:13px;margin-top:4px}
.field{display:block;text-align:left;margin:22px 0 16px}
.field span{font-size:12.5px;color:var(--ink2);font-weight:600}
.field input{
  width:100%;margin-top:7px;padding:13px 14px;font-size:16px;
  border:1.5px solid var(--line);border-radius:12px;background:#fbfcfe;color:var(--ink);
  transition:border-color var(--dur),box-shadow var(--dur);
}
.field input:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 4px rgba(79,70,229,.12)}
.btn{
  border:0;border-radius:12px;padding:12px 18px;font-size:14.5px;font-weight:600;
  cursor:pointer;transition:transform var(--dur),background var(--dur),opacity var(--dur),box-shadow var(--dur);
}
.btn:active{transform:scale(.985)}
.btn.primary{
  width:100%;color:#fff;
  background:linear-gradient(135deg,var(--brand),var(--brand2));
  box-shadow:0 12px 24px -14px rgba(79,70,229,.9);
}
.btn.primary:hover{box-shadow:0 16px 30px -14px rgba(79,70,229,1)}
.btn.primary:disabled{opacity:.55;cursor:default;box-shadow:none}
.btn.ghost{background:transparent;color:var(--muted);padding:8px 10px;font-size:13.5px}
.btn.ghost:hover{background:#eef2f9;color:var(--ink2)}
.btn.ghost-solid{background:#f1f5f9;color:var(--ink2)}
.btn.ghost-solid:hover{background:#e6ecf5}
.hint{min-height:20px;margin-top:10px;font-size:13px;color:var(--danger)}
.hint.ok{color:var(--ok)}

.brand-mark{
  display:inline-grid;place-items:center;width:34px;height:34px;border-radius:10px;
  background:linear-gradient(135deg,var(--brand),var(--brand2));
  color:#fff;font-weight:800;font-size:16px;
  box-shadow:0 8px 18px -10px rgba(79,70,229,.9);
}
.brand-mark.big{width:52px;height:52px;border-radius:15px;font-size:23px}

/* ==================== 下一步 ==================== */
.next-card{
  position:relative;overflow:hidden;
  background:linear-gradient(150deg,#0f172a 0%,#1e293b 52%,#312e81 100%);
  color:#f8fafc;border-radius:22px;padding:22px 20px;
  box-shadow:0 24px 48px -30px rgba(15,23,42,.95);
}
.next-card::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:
    radial-gradient(520px 200px at 92% -25%, rgba(124,58,237,.55), transparent 70%),
    radial-gradient(380px 180px at -5% 125%, rgba(37,99,235,.45), transparent 70%);
}
.next-card>*{position:relative;z-index:1}
.next-label{
  display:inline-flex;align-items:center;gap:6px;
  font-size:11.5px;letter-spacing:1.3px;color:#c7d2fe;font-weight:700;
  padding:4px 10px;border-radius:999px;background:rgba(255,255,255,.1);
}
.next-label::before{content:"";width:6px;height:6px;border-radius:50%;background:#a5b4fc}
.next-title{font-size:20px;line-height:1.5;margin-top:12px;letter-spacing:-.3px}
.next-goal{margin-top:10px;font-size:13.5px;color:#cbd5e1;line-height:1.6}
.next-meta{display:flex;flex-wrap:wrap;gap:7px;margin-top:16px}
.next-meta span{
  font-size:12px;padding:5px 10px;border-radius:999px;
  background:rgba(255,255,255,.12);color:#e2e8f0;
  border:1px solid rgba(255,255,255,.08);
}
.next-hint{
  background:rgba(165,180,252,.22) !important;
  color:#e0e7ff !important;
  border-color:rgba(165,180,252,.45) !important;
  font-weight:600;
}

/* ==================== 汇总 ==================== */
.summary{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:9px;margin-top:14px}
.summary .cell{
  background:var(--card);border:1px solid var(--line);border-radius:14px;
  padding:12px 12px 10px;box-shadow:var(--shadow-sm);min-width:0;
}
.summary .k{font-size:11.5px;color:var(--muted);white-space:nowrap}
.summary .v{
  font-size:21px;font-weight:800;letter-spacing:-.6px;font-variant-numeric:tabular-nums;
  margin-top:2px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
}
.summary .h{font-size:11px;color:var(--faint);margin-top:2px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.summary .cell.tone-brand .v{color:var(--brand)}
.summary .cell.tone-ok .v{color:var(--ok)}
.summary .cell.tone-violet .v{color:var(--brand2)}
.summary .cell.tone-amber .v{color:#b45309}

/* ==================== 区块标题 ==================== */
.section-title{
  display:flex;align-items:center;gap:8px;
  font-size:13px;font-weight:700;color:var(--ink2);
  margin:24px 0 12px;letter-spacing:.2px;
}
.section-title::before{
  content:"";width:4px;height:14px;border-radius:2px;
  background:linear-gradient(180deg,var(--brand),var(--brand2));
}

/* ==================== 分析面板 ==================== */
.panel{
  background:var(--card);border:1px solid var(--line);border-radius:16px;
  padding:14px;box-shadow:var(--shadow-sm);
}
.panel-note{font-size:11.5px;color:var(--faint);margin-top:10px;line-height:1.55}
.analysis-grid{display:grid;margin-top:2px}
.analysis-grid>section>.section-title{margin-top:22px}

/* 能力域进度 */
.drow{display:grid;gap:5px;padding:9px 0;border-bottom:1px dashed var(--line2)}
.drow:first-child{padding-top:2px}
.drow:last-child{border-bottom:0;padding-bottom:2px}
.drow-top{display:flex;align-items:center;gap:7px}
.drow-name{font-size:12.5px;font-weight:600;color:var(--ink2)}
.drow-num{margin-left:auto;font-size:11.5px;font-weight:700;color:var(--muted);font-variant-numeric:tabular-nums}
.drow-bar{height:6px;background:#eef2f9;border-radius:4px;overflow:hidden}
.drow-bar i{display:block;height:100%;border-radius:4px;transition:width 260ms ease}
.drow-sub{font-size:11px;color:var(--faint);font-variant-numeric:tabular-nums}

/* 周节奏 */
.wcols{display:flex;align-items:flex-end;gap:10px;height:124px}
.wcol{flex:1;display:flex;flex-direction:column;align-items:center;gap:4px;justify-content:flex-end;height:100%}
.wcol-bars{flex:1;display:flex;align-items:flex-end;justify-content:center;gap:4px;width:100%}
.wcol-bars i{display:block;width:11px;border-radius:3px 3px 0 0;min-height:2px}
.w-est{background:#dbe3f1}
.w-spent{background:linear-gradient(180deg,#6366f1,#4f46e5)}
.w-spent.over{background:linear-gradient(180deg,#fb7185,#e11d48)}
.wcol-lab{font-size:11px;color:var(--muted);font-weight:600}
.wcol-val{font-size:10.5px;color:var(--faint);font-variant-numeric:tabular-nums}
.wlegend{display:flex;gap:14px;justify-content:center;margin-top:10px}
.wlegend .lg{font-size:10.5px;color:var(--faint);display:inline-flex;align-items:center;gap:4px}
.wlegend .lg::before{content:"";width:8px;height:8px;border-radius:2px}
.lg-est::before{background:#dbe3f1}
.lg-spent::before{background:#4f46e5}

/* 类型构成 */
.trow{display:grid;grid-template-columns:32px minmax(0,1fr) 22px;align-items:center;gap:8px;padding:6px 0}
.tname{font-size:11.5px;color:var(--muted)}
.tbar{height:8px;background:#eef2f9;border-radius:5px;overflow:hidden}
.tbar i{display:block;height:100%;border-radius:5px}
.tf-学{background:#f59e0b}
.tf-练{background:#3b82f6}
.tf-产{background:#8b5cf6}
.tf-复{background:#10b981}
.tnum{font-size:11px;color:var(--muted);text-align:right;font-variant-numeric:tabular-nums}

/* 风险 */
.risks{list-style:none;margin:0;padding:0;display:grid;gap:9px}
.risk{display:grid;grid-template-columns:auto minmax(0,1fr);gap:8px;align-items:start}
.rtag{font-size:10.5px;font-weight:700;padding:2px 7px;border-radius:999px;white-space:nowrap}
.rtag.danger{background:var(--danger-soft);color:var(--danger)}
.rtag.warn{background:#fffbeb;color:#b45309}
.rtitle{font-size:12.5px;line-height:1.45;color:var(--ink2)}
.rnote{font-size:11px;color:var(--faint);margin-top:1px;font-variant-numeric:tabular-nums}

/* ==================== 甘特 ==================== */
.gantt{
  background:var(--card);border:1px solid var(--line);border-radius:16px;
  padding:14px 14px 10px;box-shadow:var(--shadow-sm);
}
.g-meta{display:flex;justify-content:space-between;gap:10px;font-size:12px;color:var(--muted);margin-bottom:10px}
.g-row{
  display:grid;grid-template-columns:94px minmax(0,1fr) 42px;
  align-items:center;gap:9px;height:23px;border-radius:7px;
  transition:background var(--dur);
}
.g-row:hover{background:#f7f9fd}
.g-l{font-size:11.5px;color:var(--ink2);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.g-track{position:relative;height:9px;background:#eef2f9;border-radius:6px}
.g-bar{position:absolute;top:0;height:9px;border-radius:6px;min-width:3px;overflow:hidden}
.g-bar i{display:block;height:100%;background:rgba(255,255,255,.72)}
.g-v{font-size:11px;color:var(--faint);text-align:right;font-variant-numeric:tabular-nums}

/* ---------- 纵向时间线（窄屏专用） ---------- */
.vtl-overview{
  display:flex;height:9px;border-radius:5px;overflow:hidden;
  background:#eef2f9;margin:2px 0 14px;
}
.vtl-overview i{display:block;height:100%;min-width:2px}
.vtl-list{list-style:none;margin:0;padding:0}
.vtl-item{
  position:relative;display:grid;grid-template-columns:auto minmax(0,1fr);
  gap:10px;padding-bottom:15px;
}
.vtl-item:last-child{padding-bottom:0}
/* 左侧竖线：把"顺序"画出来 */
.vtl-item::before{
  content:"";position:absolute;left:5px;top:14px;bottom:0;
  width:2px;background:linear-gradient(180deg,var(--line),var(--line2));
}
.vtl-item:last-child::before{display:none}
.vtl-dot{
  width:12px;height:12px;border-radius:50%;margin-top:4px;flex:none;
  box-shadow:0 0 0 3px #fff;position:relative;z-index:1;
}
.vtl-item.is-doing .vtl-dot{box-shadow:0 0 0 3px #fff,0 0 0 6px rgba(79,70,229,.18)}
.vtl-body{min-width:0}
.vtl-title{font-size:13.5px;line-height:1.5;color:var(--ink);word-break:break-word}
.vtl-item.is-done .vtl-title{color:var(--muted);text-decoration:line-through}
.vtl-meta{
  display:flex;flex-wrap:wrap;gap:10px;margin-top:4px;
  font-size:11px;color:var(--faint);font-variant-numeric:tabular-nums;
}
.vtl-pct{color:var(--ink2)}
.vtl-domain{color:var(--muted);font-weight:600}
.vtl-bar{height:4px;background:#eef2f9;border-radius:3px;margin-top:6px;overflow:hidden}
.vtl-bar i{display:block;height:100%;border-radius:3px}

/* ==================== 通用小件 ==================== */
.dot{width:8px;height:8px;border-radius:50%;flex:none;box-shadow:0 0 0 3px rgba(15,23,42,.04)}
.tag{font-size:11px;padding:2px 7px;border-radius:999px;background:#f1f5f9;color:var(--muted);white-space:nowrap}

.empty{
  border:1px dashed var(--line);border-radius:12px;
  padding:18px;color:var(--muted);font-size:12.5px;text-align:center;
}

/* ==================== 看板 ==================== */
/* 手机：状态切换条 + 单列；桌面（见媒体查询）恢复四列 */

.btabs{
  position:sticky;top:0;z-index:16;
  display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:6px;
  margin:0 -2px;padding:6px 0 10px;
  background:linear-gradient(180deg,rgba(247,249,253,.98) 72%,rgba(247,249,253,.72));
  backdrop-filter:blur(10px);
}
.btab{
  display:flex;flex-direction:column;align-items:center;gap:1px;
  padding:7px 2px;border:1px solid var(--line);border-radius:12px;
  background:#fff;color:var(--muted);cursor:pointer;
  box-shadow:var(--shadow-sm);
  transition:border-color var(--dur),background var(--dur),color var(--dur),transform var(--dur);
}
.btab:active{transform:scale(.97)}
.btab-count{font-size:15px;font-weight:800;color:var(--ink2);font-variant-numeric:tabular-nums;line-height:1.25}
.btab-name{font-size:11px;font-weight:600;white-space:nowrap}
.btab.active{border-color:#c7d2fe;background:linear-gradient(180deg,#f5f7ff,#eef2ff);color:var(--brand)}
.btab.active .btab-count{color:var(--brand)}
.btab[data-status="done"].active{border-color:#bbf7d0;background:#f0fdf4;color:var(--ok)}
.btab[data-status="done"].active .btab-count{color:var(--ok)}
.btab[data-status="blocked"].active{border-color:#fecdd3;background:#fff1f2;color:var(--danger)}
.btab[data-status="blocked"].active .btab-count{color:var(--danger)}

.board{display:block}
.bgrid{display:block}
.bcol{display:none;flex-direction:column;gap:9px}
.bcol.is-active{display:flex}
.bcol-head{display:none}
.bcol-body{display:flex;flex-direction:column;gap:9px}

.bcard{
  display:grid;grid-template-columns:minmax(0,1fr) auto;column-gap:8px;
  width:100%;text-align:left;font-family:inherit;cursor:pointer;
  background:#fff;border:1px solid var(--line);
  border-radius:12px;padding:11px 12px;
  box-shadow:var(--shadow-sm);
  transition:transform var(--dur),box-shadow var(--dur),border-color var(--dur);
}
.bcard:active{transform:scale(.99)}
/* 只保留完成态的弱化文字（排版线索），不再用颜色标状态 */
.bcard.st-done .bcard-title{color:var(--muted)}
.bcard-top{grid-column:1;display:flex;align-items:center;gap:6px;margin-bottom:5px}
.bcard-domain{
  display:inline-flex;align-items:center;gap:5px;
  font-size:11px;font-weight:600;color:var(--muted);
}
.bcard-seq{margin-left:auto;font-size:11px;font-weight:700;color:var(--faint);font-variant-numeric:tabular-nums}

/* 状态图标：形状表意，颜色中性（避免与能力域色混淆） */
.st-icon{display:inline-flex;align-items:center;justify-content:center;width:15px;height:15px;flex:none;color:#94a3b8}
.st-icon svg{
  width:15px;height:15px;fill:none;stroke:currentColor;
  stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;
}
.st-icon.st-doing,.st-icon.st-blocked{color:#475569}
.st-icon.st-done{color:#64748b}
.vtl-meta .st-icon{margin-top:1px}
.bcard-title{grid-column:1;font-size:13.5px;line-height:1.5;color:var(--ink)}
.bcard-meta{grid-column:1;display:flex;flex-wrap:wrap;gap:4px;margin-top:7px}
.bcard-go{
  grid-column:2;grid-row:1 / span 3;align-self:center;
  color:#cbd5e1;font-size:20px;font-weight:700;line-height:1;
}
.bempty{
  display:grid;place-items:center;text-align:center;
  color:#a8b3c4;font-size:12.5px;padding:28px 0;
  border:1px dashed #d5ddea;border-radius:12px;
}

/* ==================== 拆解 ==================== */
.drill-head{display:flex;align-items:center;justify-content:space-between;gap:10px;margin:4px 0 12px}
.drill-head .btn{flex:none;white-space:nowrap}
.drill-progress{font-size:12.5px;color:var(--muted)}
.drill-list{display:grid;gap:10px}
.dcard{
  background:var(--card);border:1px solid var(--line);border-radius:14px;
  padding:12px 13px;box-shadow:var(--shadow-sm);
  transition:opacity var(--dur),box-shadow var(--dur);
}
.dcard:hover{box-shadow:var(--shadow)}
.dcard.saving{opacity:.55}
.dcard.failed{box-shadow:0 0 0 2px var(--danger) inset}
.dcard-head{display:flex;align-items:center;gap:8px;margin-bottom:7px}
.dcard-idx{font-size:12px;font-weight:700;color:var(--faint);font-variant-numeric:tabular-nums}
.dcard-body{display:grid;gap:8px}
.dfield{display:block}
.dfield-l{font-size:11.5px;color:var(--muted)}
.dinput,.dselect{
  width:100%;margin-top:3px;padding:9px 10px;font-size:13.5px;font-family:inherit;
  border:1px solid var(--line);border-radius:9px;background:#fbfcfe;color:var(--ink);
  transition:border-color var(--dur),box-shadow var(--dur);
}
.dinput:focus,.dselect:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px rgba(79,70,229,.12)}

/* ==================== 操作面板 ==================== */
.sheet-mask{
  position:fixed;inset:0;z-index:50;display:flex;align-items:flex-end;
  background:rgba(15,23,42,.5);opacity:0;transition:opacity var(--dur);
  backdrop-filter:blur(2px);
}
.sheet-mask.show{opacity:1}
.sheet{
  position:relative;width:100%;max-height:88dvh;overflow:auto;
  background:#fff;border-radius:22px 22px 0 0;
  padding:20px 18px calc(18px + env(safe-area-inset-bottom));
  transform:translateY(18px);transition:transform var(--dur);
  box-shadow:0 -14px 44px -20px rgba(15,23,42,.55);
}
.sheet-mask.show .sheet{transform:translateY(0)}
.sheet-top{display:flex;align-items:flex-start;justify-content:space-between;gap:10px}
.sheet-close{
  flex:none;width:32px;height:32px;border:0;background:#f1f5f9;color:var(--muted);
  border-radius:50%;font-size:18px;line-height:1;cursor:pointer;font-family:inherit;
  transition:background var(--dur),color var(--dur);
}
.sheet-close:hover{background:#e6ecf5;color:var(--ink2)}
.sheet-eyebrow{font-size:11.5px;color:var(--muted);letter-spacing:.3px;padding-top:7px}
.sheet-title{font-size:18px;line-height:1.45;margin-top:6px;letter-spacing:-.3px}
.sheet-goal{font-size:13px;color:var(--ink2);margin-top:9px;background:#f7f9fd;border-radius:11px;padding:11px 12px;border:1px solid var(--line2)}
.sheet-meta{font-size:12.5px;color:var(--muted);margin-top:8px}
.sheet-actions{display:grid;gap:8px;margin-top:16px}
.sheet-actions .btn{width:100%}
.sheet-area{display:grid;gap:8px}
.sfield{display:block;margin-top:14px}
.sfield-l{font-size:12.5px;font-weight:600;color:var(--ink2)}
.sinput{
  width:100%;margin-top:6px;padding:12px;font-size:14.5px;font-family:inherit;
  border:1.5px solid var(--line);border-radius:11px;background:#fbfcfe;color:var(--ink);
  transition:border-color var(--dur),box-shadow var(--dur);
}
.sinput:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 4px rgba(79,70,229,.12)}
.sarea{resize:vertical}
.sfield-h{display:block;font-size:11.5px;color:var(--muted);margin-top:5px}
#sheet-area>.btn.primary{margin-top:16px}

/* 任务详情里的「怎么做 / 示例」 */
.sheet-info{margin-top:6px}
.sheet-label{
  display:flex;align-items:center;gap:6px;
  font-size:12px;font-weight:700;color:var(--ink2);margin:16px 0 8px;
}
.sheet-label::before{
  content:"";width:3px;height:12px;border-radius:2px;
  background:linear-gradient(180deg,var(--brand),var(--brand2));
}
.sheet-steps{margin:0;padding-left:19px;display:grid;gap:7px}
.sheet-steps li{font-size:12.8px;line-height:1.6;color:var(--ink2)}
.sheet-steps li::marker{color:var(--brand);font-weight:700}
.sheet-ex{
  margin-top:12px;border:1px solid var(--line2);border-radius:12px;
  background:#f8fafc;padding:0 12px;
}
.sheet-ex summary{
  font-size:12.5px;font-weight:600;color:var(--brand);
  cursor:pointer;padding:11px 0;list-style:none;
}
.sheet-ex summary::-webkit-details-marker{display:none}
.sheet-ex summary::before{content:"▸ ";color:var(--brand)}
.sheet-ex[open] summary::before{content:"▾ "}
.sheet-ex .ans-doc{background:transparent;border:0;padding:0 0 12px;margin:0}
body.sheet-open{overflow:hidden}

/* ==================== 作答 ==================== */
.ans-mask{
  position:fixed;inset:0;z-index:55;display:flex;align-items:flex-end;
  background:rgba(15,23,42,.5);opacity:0;transition:opacity var(--dur);
  backdrop-filter:blur(2px);
}
.ans-mask.show{opacity:1}
.ans-panel{
  display:flex;flex-direction:column;width:100%;height:94dvh;
  background:#fff;border-radius:22px 22px 0 0;transform:translateY(18px);
  transition:transform var(--dur);overflow:hidden;
  box-shadow:0 -14px 44px -20px rgba(15,23,42,.55);
}
.ans-mask.show .ans-panel{transform:translateY(0)}
.ans-head{
  display:flex;align-items:flex-start;justify-content:space-between;gap:10px;
  padding:16px 16px 12px;border-bottom:1px solid var(--line2);flex:none;
}
.ans-eyebrow{font-size:11.5px;color:var(--muted);word-break:break-all}
.ans-title{font-size:16.5px;line-height:1.45;margin-top:4px;letter-spacing:-.2px}
.ans-scroll{flex:1;overflow-y:auto;padding:14px 16px 20px}
.ans-details summary{font-size:13px;font-weight:600;color:var(--brand);cursor:pointer;padding:8px 0}
.ans-doc{background:#f7f9fd;border:1px solid var(--line2);border-radius:12px;padding:12px 14px;margin-bottom:12px}
.doc-h{font-size:14px;margin:10px 0 6px;color:var(--ink)}
.doc-p{font-size:12.8px;color:var(--ink2);margin:5px 0}
.doc-ul{margin:5px 0 5px 18px;padding:0}
.doc-ul li{font-size:12.8px;color:var(--ink2);margin:3px 0}
.doc-quote{
  margin:6px 0;padding:7px 11px;border-radius:0 8px 8px 0;
  border-left:3px solid #c7d2fe;background:#fff;
  font-size:12.6px;color:var(--ink2);line-height:1.6;
}
.doc-table{
  width:100%;border-collapse:collapse;margin:9px 0;
  font-size:11.5px;line-height:1.45;background:#fff;
}
.doc-table th,.doc-table td{
  border:1px solid var(--line2);padding:5px 7px;
  text-align:left;vertical-align:top;color:var(--ink2);
}
.doc-table th{background:#eef2f9;color:var(--ink2);font-weight:700;white-space:nowrap}
.doc-pre{
  margin:9px 0;padding:10px 12px;border-radius:9px;
  background:#0f172a;color:#e2e8f0;
  font-size:11.5px;line-height:1.6;white-space:pre-wrap;overflow-x:auto;
}
.ans-checks{display:grid;gap:7px;margin-bottom:14px}
.ans-label{font-size:12.5px;font-weight:700;color:var(--ink2);margin:10px 0 6px}
.ans-check{display:flex;gap:9px;align-items:flex-start;font-size:13px;color:var(--ink2);line-height:1.55}
.ans-check input{margin-top:3px;width:17px;height:17px;flex:none;accent-color:var(--brand)}
.ans-editor{
  width:100%;min-height:160px;margin-top:6px;padding:12px;font-size:14px;font-family:inherit;
  line-height:1.6;border:1.5px solid var(--line);border-radius:12px;background:#fbfcfe;
  color:var(--ink);resize:vertical;
}
.ans-editor:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 4px rgba(79,70,229,.12)}
.ans-foot{
  display:flex;align-items:center;gap:12px;flex:none;
  padding:12px 16px calc(12px + env(safe-area-inset-bottom));
  border-top:1px solid var(--line2);background:#fff;
}
.ans-foot .btn{flex:1}
.ans-status{font-size:12px;color:var(--muted)}
.ans-status.ok{color:var(--ok)}

/* ==================== 提示条 ==================== */
.toast{
  position:fixed;left:50%;bottom:calc(80px + env(safe-area-inset-bottom));
  transform:translate(-50%,16px);z-index:60;
  max-width:calc(100% - 36px);padding:11px 16px;border-radius:12px;
  font-size:13.5px;font-weight:600;color:#fff;background:#1e293b;
  box-shadow:0 16px 34px -16px rgba(15,23,42,.7);
  opacity:0;pointer-events:none;
  transition:opacity var(--dur),transform var(--dur);
}
.toast.show{opacity:1;transform:translate(-50%,0)}
.toast[data-kind="ok"]{background:#15803d}
.toast[data-kind="error"]{background:#9f1239}

/* ==================== 平板 ==================== */
@media (min-width:720px){
  .sheet-mask{align-items:center;justify-content:center}
  .sheet{max-width:560px;border-radius:22px;transform:translateY(8px) scale(.985)}
  .sheet-mask.show .sheet{transform:none}
  .ans-mask{align-items:center;justify-content:center}
  .ans-panel{max-width:760px;height:88dvh;border-radius:22px}
  .drill-list{grid-template-columns:repeat(2,minmax(0,1fr))}
  .summary{grid-template-columns:repeat(4,minmax(0,1fr));gap:14px}
}

/* ==================== 桌面：左导航 + 宽屏多列 ==================== */
@media (min-width:1024px){
  .shell{display:grid;grid-template-columns:var(--sidenav) minmax(0,1fr);align-items:start}

  .sidenav{
    position:sticky;top:0;height:100dvh;
    display:flex;flex-direction:column;gap:6px;
    padding:20px 14px;background:#fff;border-right:1px solid var(--line);
    border-top:0;backdrop-filter:none;
  }
  /* 必须带 .sidenav 前缀，否则压不过移动端 `.sidenav .brand{display:none}`（同 E-002 的权重坑） */
  .sidenav .brand{display:flex;align-items:center;gap:10px;padding:4px 6px 18px}
  .brand-text{display:flex;flex-direction:column;line-height:1.3}
  .brand-text strong{font-size:14.5px;letter-spacing:-.2px}
  .brand-text small{font-size:11px;color:var(--faint)}
  .nav{flex-direction:column;gap:4px}
  .tab{
    flex-direction:row;justify-content:flex-start;gap:10px;width:100%;
    padding:11px 12px;font-size:14px;border-radius:12px;
  }
  .tab svg{width:18px;height:18px}
  .tab:hover{background:#f5f7fc;color:var(--ink2)}
  .tab.active{
    background:linear-gradient(135deg,var(--brand),var(--brand2));
    color:#fff;box-shadow:0 14px 26px -18px rgba(79,70,229,1);
  }
  .tab.active:hover{background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff}
  .sidenav .sidenav-foot{display:block;margin-top:auto;padding:12px 8px 4px;border-top:1px solid var(--line2)}
  .foot-line{font-size:11px;color:var(--muted)}
  .foot-line.dim{color:var(--faint);margin-top:2px}

  .appbar{position:sticky;top:0;max-width:1180px;margin:0 auto;padding:26px 34px 16px}
  .appbar h1{font-size:28px}
  .appbar-r{gap:14px}
  .live{display:inline-flex}
  .content{max-width:1180px;margin:0 auto;padding:0 34px 56px}

  .next-card{padding:26px 30px;border-radius:24px}
  .next-title{font-size:25px;max-width:900px}
  .next-goal{font-size:14px;max-width:820px}
  .summary{gap:14px;margin-top:18px}
  .summary .cell{padding:15px 16px 13px}
  .summary .k{font-size:12.5px}
  .summary .v{font-size:27px}

  .today-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:26px;align-items:start}
  .today-grid>section>.section-title:first-child{margin-top:0}
  .analysis-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:26px}
  .analysis-grid>section>.section-title{margin-top:26px}
  .summary .v{font-size:26px}
  .g-row{grid-template-columns:188px minmax(0,1fr) 48px;height:25px}
  .g-l{font-size:12px}

  .btabs{display:none}
  .bgrid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}
  .bcol{
    display:flex;min-height:560px;padding:14px 12px;
    background:#eaeff8;border:1px solid #e3e9f3;border-radius:16px;
  }
  .bcol-head{display:flex;align-items:center;gap:7px;padding:0 3px}
  .bcol-name{font-size:13px;font-weight:700;color:var(--ink2)}
  .bcol-count{
    font-size:11px;font-weight:700;color:var(--muted);background:#fff;
    border-radius:999px;padding:1px 7px;font-variant-numeric:tabular-nums;
    box-shadow:var(--shadow-sm);
  }
  .bcol-hint{font-size:10.5px;color:var(--faint);margin-left:auto}
  .bcol-doing .bcol-name{color:var(--brand)}
  .bcol-done .bcol-name{color:var(--ok)}
  .bcol-blocked .bcol-name{color:var(--danger)}
  .bcol-body{gap:7px;flex:1}
  .bcard:hover{transform:translateY(-1px);box-shadow:var(--shadow)}
  .bcard-go{display:none}
  .bempty{padding:14px 0;font-size:12px}

  .drill-list{grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
  .dcard{padding:14px 15px}

  .toast{bottom:28px;left:auto;right:28px;transform:translate(0,16px);max-width:420px}
  .toast.show{transform:translate(0,0)}
}

/* ==================== 超宽屏 ==================== */
@media (min-width:1440px){
  .appbar,.content{max-width:1300px}
  .today-grid{grid-template-columns:1.06fr .94fr;gap:30px}
}

@media (prefers-reduced-motion: reduce){
  *{transition:none !important;animation:none !important}
}