:root{
    --blue:#2563eb; --blue-soft:#eff4ff; --teal:#0d9488; --teal-soft:#e6f7f5;
    --red:#dc2626; --green:#16a34a; --amber:#d97706; --ink:#1f2937; --muted:#6b7280;
    --line:#e5e7eb; --bg:#f7f8fa; --card:#ffffff; --radius:14px;
  }
  *{box-sizing:border-box;-webkit-tap-highlight-color:transparent;}
  body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"PingFang SC","Microsoft YaHei",sans-serif;
    background:var(--bg);color:var(--ink);font-size:15px;line-height:1.5;padding-bottom:calc(20px + env(safe-area-inset-bottom));}
  .wrap{max-width:960px;margin:0 auto;padding:14px;}
  header{background:linear-gradient(135deg,#2563eb,#0d9488);color:#fff;border-radius:var(--radius);padding:18px 18px 16px;margin-bottom:14px;}
  header h1{margin:0 0 4px;font-size:19px;}
  header p{margin:0;opacity:.92;font-size:13px;}
  .topbar{display:flex;flex-wrap:wrap;gap:8px;margin:12px 0 14px;}
  .btn{display:inline-flex;align-items:center;gap:6px;border:1px solid var(--line);background:#fff;color:var(--ink);
    border-radius:10px;padding:10px 12px;font-size:14px;cursor:pointer;min-height:44px;flex:1;justify-content:center;}
  .btn svg{width:16px;height:16px;}
  .btn.primary{background:var(--blue);color:#fff;border-color:var(--blue);}
  .btn.ghost{background:#fff;}
  .btn.red{background:var(--red);color:#fff;border-color:var(--red);}
  .card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:16px;margin-bottom:14px;
    box-shadow:0 1px 2px rgba(0,0,0,.03);}
  .card h2{margin:0 0 12px;font-size:16px;display:flex;align-items:center;gap:8px;}
  .card h2 svg{width:18px;height:18px;color:var(--blue);}
  .today{border:1.5px solid var(--blue);background:var(--blue-soft);}
  .today .subj{display:inline-block;font-size:12px;font-weight:600;padding:2px 8px;border-radius:20px;background:#fff;margin-bottom:8px;}
  .today .chap{font-size:18px;font-weight:700;margin:2px 0 6px;}
  .today .lec{font-size:14px;color:var(--ink);}
  .today .goal{margin-top:10px;padding:10px 12px;background:#fff;border-radius:10px;font-size:14px;}
  .today .goal b{color:var(--teal);}
  .today .kp{margin-top:8px;padding:10px 12px;background:var(--teal-soft);border:1px solid #99f6e4;border-radius:10px;font-size:14px;}
  .today .kp b{color:var(--teal);}
  .today .point{margin-top:8px;}
  .today .point.plain{padding:6px 0;color:#0f766e;}
  .today .point-h{display:flex;align-items:center;gap:6px;width:100%;text-align:left;background:#fff;border:1px solid #99f6e4;border-radius:8px;padding:8px 10px;min-height:44px;font-size:14px;color:#0f766e;cursor:pointer;-webkit-tap-highlight-color:transparent;}
  .today .point-h:hover{background:#f0fdfa;}
  .today .point-h .arrow{transition:transform .15s;color:#14b8a6;font-size:12px;}
  .today .point-b{display:none;padding:8px 10px 10px 22px;font-size:13.5px;line-height:1.7;color:#334155;}
  .today .point-b b{color:#0f766e;}
  .today .point-b .freq{margin-top:6px;color:#b45309;}
  .today .point-b .pg{margin-top:4px;color:#1d4ed8;}
  .today .do{margin-top:12px;display:flex;gap:8px;flex-wrap:wrap;}
  .today .do .btn{flex:1;min-width:120px;}
  .countdown{font-size:15px;color:var(--ink);}
  .countdown b{color:var(--blue);font-size:22px;}
  .stats{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;margin-bottom:12px;}
  .stat{background:#fff;border:1px solid var(--line);border-radius:12px;padding:10px;text-align:center;}
  .stat .n{font-size:20px;font-weight:700;color:var(--blue);}
  .stat .l{font-size:11px;color:var(--muted);margin-top:2px;}
  table{width:100%;border-collapse:collapse;font-size:13.5px;}
  th,td{text-align:left;padding:9px 8px;border-bottom:1px solid var(--line);vertical-align:top;}
  th{color:var(--muted);font-weight:600;font-size:12px;background:#fafbfc;}
  tr.done td{color:var(--muted);}
  tr.done .chap{text-decoration:line-through;}
  .tag{display:inline-block;font-size:11px;padding:1px 7px;border-radius:20px;background:var(--blue-soft);color:var(--blue);font-weight:600;}
  .tag.rev{background:#fef3c7;color:var(--amber);}
  .tag.gap{background:#e0f2fe;color:#0369a1;}
  .mini{font-size:12px;color:var(--muted);}
  .filter{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:10px;}
  .filter select{min-height:40px;border:1px solid var(--line);border-radius:10px;padding:6px 10px;font-size:14px;background:#fff;flex:1;min-width:110px;}
  .note{background:#eff6ff;border:1px solid #bfdbfe;color:#1e40af;border-radius:12px;padding:12px 14px;font-size:13.5px;margin-bottom:14px;line-height:1.6;}
  .note b{color:var(--blue);}
  .strat{font-size:13.5px;line-height:1.7;}
  .strat li{margin-bottom:6px;}
  .setting-row{display:flex;align-items:center;gap:10px;margin-bottom:10px;flex-wrap:wrap;}
  .setting-row label{font-size:14px;min-width:90px;}
  .setting-row input{flex:1;min-height:44px;border:1px solid var(--line);border-radius:10px;padding:8px 10px;font-size:16px;min-width:140px;}
  .setting-row.col{display:block;}
  .setting-row.col>label{display:block;min-width:0;margin-bottom:8px;line-height:1.5;color:var(--muted);font-size:12.5px;}
  .done-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;}
  .done-cell{display:flex;align-items:center;gap:6px;background:#f8fafc;border:1px solid var(--line);border-radius:10px;padding:6px 8px;}
  .done-cell span{font-size:13px;color:#334155;white-space:nowrap;}
  .done-cell input{flex:1;min-width:0;min-height:38px;border:1px solid var(--line);border-radius:8px;padding:6px 8px;font-size:16px;text-align:center;}
  @media(max-width:520px){ .done-grid{grid-template-columns:repeat(2,1fr);} }
  .overlay{position:fixed;inset:0;background:rgba(0,0,0,.45);display:none;align-items:center;justify-content:center;z-index:50;padding:16px;}
  .overlay.show{display:flex;}
  .modal{background:#fff;border-radius:14px;padding:18px;width:100%;max-width:420px;max-height:80vh;overflow:auto;}
  .modal h3{margin:0 0 10px;font-size:16px;}
  .modal textarea{width:100%;height:160px;border:1px solid var(--line);border-radius:10px;padding:10px;font-size:13px;font-family:monospace;}
  /* 设置弹窗：头/底固定，中间滚动（仅 ovSettings 作用域，不影响导入/确认弹窗） */
  /* 默认比通用 .modal 更宽；手机下占 80% 视口宽 */
  #ovSettings .modal, #ovLogin .modal{display:flex;flex-direction:column;padding:0;max-height:85vh;overflow:hidden;width:92vw;max-width:560px;}
  @media(max-width:520px){ #ovSettings .modal, #ovLogin .modal{width:80vw;} }
  #ovSettings .modal-head, #ovLogin .modal-head{flex:0 0 auto;display:flex;align-items:center;justify-content:space-between;gap:10px;padding:14px 18px;border-bottom:1px solid var(--line);}
  #ovSettings .modal-head h3, #ovLogin .modal-head h3{margin:0;font-size:16px;}
  #ovSettings .modal-head .x, #ovLogin .modal-head .x{flex:0 0 auto;width:32px;height:32px;border:none;background:transparent;color:var(--muted);font-size:22px;line-height:1;cursor:pointer;border-radius:8px;}
  #ovSettings .modal-head .x:hover, #ovLogin .modal-head .x:hover{background:var(--bg);color:var(--ink);}
  #ovSettings .modal-body, #ovLogin .modal-body{flex:1 1 auto;overflow-y:auto;-webkit-overflow-scrolling:touch;padding:14px 18px;}
  #ovSettings .modal-foot, #ovLogin .modal-foot{flex:0 0 auto;display:flex;gap:8px;padding:12px 18px;border-top:1px solid var(--line);padding-bottom:calc(12px + env(safe-area-inset-bottom));}
  #ovSettings .modal-body .setting-row:last-child{margin-bottom:0;}
  .bottomtab{position:fixed;left:0;right:0;bottom:0;background:#fff;border-top:1px solid var(--line);display:none;
    padding:6px 4px calc(6px + env(safe-area-inset-bottom));z-index:40;}
  .bottomtab a{flex:1;text-align:center;font-size:11px;color:var(--muted);text-decoration:none;padding:6px 2px;}
  .bottomtab a svg{display:block;margin:0 auto 2px;width:20px;height:20px;}
  .bottomtab a.active{color:var(--blue);}
  .sec{scroll-margin-top:12px;}
  .empty{color:var(--muted);font-size:13px;text-align:center;padding:20px;}
  /* 新增 */
  .progress-row{display:flex;justify-content:space-between;align-items:center;margin:6px 0;font-size:13.5px;}
  .progress-bar{height:8px;background:var(--line);border-radius:4px;overflow:hidden;margin:6px 0;}
  .progress-bar>div{height:100%;background:linear-gradient(90deg,var(--blue),var(--teal));border-radius:4px;transition:width .3s;}
  .adjust{display:flex;align-items:center;gap:10px;margin-top:10px;padding:12px;background:#f9fafb;border-radius:10px;flex-wrap:wrap;}
  .adjust label{font-size:13.5px;color:var(--muted);}
  .adjust input{width:66px;text-align:center;font-size:16px;min-height:40px;border:1px solid var(--line);border-radius:8px;}
  .adjust .btn{flex:none;min-width:44px;padding:8px 12px;}
  .quiz{margin-top:14px;border-top:1px dashed var(--line);padding-top:14px;}
  .quiz h3{margin:0 0 10px;font-size:15px;display:flex;align-items:center;gap:6px;}
  .q{margin-bottom:14px;padding:12px;background:#fafbfc;border-radius:10px;border:1px solid var(--line);}
  .q .source{font-size:11px;color:var(--muted);margin-bottom:6px;}
  .q .stem{font-size:14px;line-height:1.6;margin-bottom:8px;overflow-wrap:anywhere;word-break:break-word;}
  .opts{display:flex;flex-direction:column;gap:6px;}
  .opt{padding:8px 10px;background:#fff;border:1px solid var(--line);border-radius:8px;font-size:13.5px;cursor:pointer;display:flex;align-items:flex-start;gap:2px;}
  .opt-key{display:inline-flex;align-items:center;justify-content:center;min-width:22px;height:22px;margin-right:8px;background:#e0edff;color:#1d4ed8;border-radius:6px;font-size:12px;font-weight:700;flex:0 0 auto;}
  .opt-txt{flex:1;line-height:1.55;overflow-wrap:anywhere;word-break:break-word;}
  .opt:hover{border-color:var(--blue);}
  .ans{margin-top:8px;padding:10px;background:#eff6ff;border-radius:8px;font-size:13px;display:none;}
  .ans.show{display:block;}
  .warning{background:#fef2f2;border:1px solid #fecaca;color:#991b1b;border-radius:10px;padding:10px 12px;font-size:13.5px;margin-top:10px;}
  .okay{background:#f0fdf4;border:1px solid #bbf7d0;color:#166534;border-radius:10px;padding:10px 12px;font-size:13.5px;margin-top:10px;}
  .warn-title{font-weight:700;display:flex;align-items:center;gap:4px;}
  .big{font-size:18px;font-weight:700;color:var(--blue);}
  @media(max-width:768px){
    .stats{grid-template-columns:repeat(2,1fr);}
    .bottomtab{display:flex;}
    .topbar .btn{flex:none;min-width:auto;}
    th.hide-sm,td.hide-sm{display:none;}
    .adjust input{width:56px;}
    .metrics{grid-template-columns:repeat(2,1fr);}
    .dgrid{grid-template-columns:1fr;}
    .chap-row{grid-template-columns:1fr 58px 42px;}
  }
  @media(max-width:520px){
    .wrap{padding:10px;}
    header{padding:14px 14px 12px;}
    header h1{font-size:17px;}
    header p{font-size:12px;}
    .card{padding:12px;}
    .q{padding:10px;}
    .opt{font-size:14px;padding:10px 10px;}
    .opt-key{height:24px;min-width:24px;margin-right:10px;}
    .q .stem{font-size:14.5px;}
    .q-opts{margin-left:14px;}
    .stats{gap:6px;}
    .stat .n{font-size:18px;}
    .topbar{gap:6px;margin:10px 0 12px;}
    .topbar .btn.primary{flex:1 1 100%;}
    .topbar .btn{flex:1 1 calc(50% - 6px);min-width:0;font-size:13px;padding:10px 8px;}
    table{font-size:12.5px;}
    th,td{padding:8px 6px;}
    .done-grid{grid-template-columns:repeat(2,1fr);}
  }
  /* ===== 科目进度行（学习进度与预警） ===== */
  .prog-total{font-size:13px;color:var(--muted);margin-bottom:10px;}
  .prog-total b{color:var(--ink);}
  .subj-rows{display:flex;flex-direction:column;gap:10px;}
  .subj-row{border:1px solid var(--line);border-radius:12px;overflow:hidden;background:#fff;}
  .subj-head{display:flex;align-items:center;gap:10px;padding:12px 14px;cursor:pointer;-webkit-tap-highlight-color:transparent;}
  .subj-head:active{background:#fafbfc;}
  .subj-head .dot{width:10px;height:10px;border-radius:50%;flex:none;}
  .subj-name{flex:1;min-width:0;font-weight:600;font-size:15px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
  .subj-pct{font-weight:700;font-size:15px;flex:none;}
  .chev{width:18px;height:18px;color:var(--muted);transition:transform .25s;flex:none;}
  .chev.open{transform:rotate(180deg);}
  .badge{font-size:11px;font-weight:600;padding:2px 8px;border-radius:20px;white-space:nowrap;flex:none;}
  .badge.bad{background:#fef2f2;color:var(--red);border:1px solid #fecaca;}
  .badge.good{background:#f0fdf4;color:var(--green);border:1px solid #bbf7d0;}
  .subj-summary{padding:0 14px 12px;}
  .metrics{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;}
  .metric{background:#fafbfc;border:1px solid var(--line);border-radius:10px;padding:8px 4px;text-align:center;}
  .metric .mv{font-size:17px;font-weight:700;color:var(--ink);line-height:1.1;}
  .metric .mv .u{font-size:11px;font-weight:500;color:var(--muted);margin-left:1px;}
  .metric .ml{font-size:11px;color:var(--muted);margin-top:3px;}
  .subj-bar{height:6px;background:var(--line);border-radius:4px;overflow:hidden;margin-top:10px;}
  .subj-bar>div{height:100%;border-radius:4px;transition:width .3s;}
  .phase-box{border:1px solid var(--line);border-radius:12px;padding:10px 12px;margin-bottom:12px;background:#fbfdff;}
  .phase-row{display:flex;gap:10px;align-items:flex-start;padding:7px 0;border-bottom:1px dashed var(--line);}
  .phase-row:last-child{border-bottom:none;}
  .ph-tag{flex:0 0 auto;font-size:11px;font-weight:700;padding:2px 8px;border-radius:20px;margin-top:2px;}
  .ph-tag.y1{background:var(--blue-soft);color:var(--blue);}
  .ph-tag.gp{background:#e0f2fe;color:#0369a1;}
  .ph-tag.y2{background:#dcfce7;color:#15803d;}
  .ph-body{flex:1;min-width:0;}
  .ph-t{font-size:13px;font-weight:600;color:var(--ink);}
  .ph-d{font-size:12.5px;color:var(--muted);margin-top:2px;line-height:1.6;}
  .ph-d b{color:var(--ink);font-weight:600;}
  .subj-window{margin-top:9px;font-size:12.5px;color:var(--muted);}
  .subj-window b{color:var(--ink);font-weight:600;}
  .subj-row.collapsed{background:#f7f8fa;}
  .subj-row.collapsed .subj-head{padding-top:10px;padding-bottom:10px;}
  .subj-mini{display:flex;flex-direction:column;gap:8px;padding:0 14px 12px;}
  .subj-bar.slim{margin-top:0;height:5px;}
  .learning-flag{display:inline-block;margin-left:8px;font-size:10.5px;font-weight:700;color:#fff;background:var(--green);border-radius:20px;padding:1px 7px;vertical-align:middle;flex:none;}
  .subj-detail{border-top:1px solid var(--line);padding:12px 14px;background:#fcfdfe;}
  .dgrid{display:grid;grid-template-columns:repeat(2,1fr);gap:8px 14px;}
  .dcell{display:flex;justify-content:space-between;align-items:center;gap:8px;font-size:13px;border-bottom:1px dashed var(--line);padding-bottom:6px;}
  .dcell span{color:var(--muted);}
  .dcell b{font-weight:600;text-align:right;}
  .dcell.wide{grid-column:1 / -1;}
  .chap-title{font-size:13px;font-weight:600;margin:14px 0 8px;color:var(--ink);}
  .chap-list{display:flex;flex-direction:column;gap:6px;}
  .chap-row{display:grid;grid-template-columns:1fr 70px 46px;align-items:center;gap:8px;font-size:12.5px;}
  .chap-row .cn{overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}
  .cbar{height:6px;background:var(--line);border-radius:4px;overflow:hidden;}
  .cbar>span{display:block;height:100%;border-radius:4px;}
  .chap-row .cv{text-align:right;color:var(--muted);font-variant-numeric:tabular-nums;}
  /* 列表 / 日历 视图切换 */
  .view-toggle{display:inline-flex;gap:0;border:1px solid var(--line);border-radius:10px;overflow:hidden;margin-bottom:10px;}
  .vt-btn{appearance:none;border:none;background:#fff;color:var(--muted);font-size:13.5px;font-weight:600;padding:0 18px;min-height:38px;cursor:pointer;-webkit-tap-highlight-color:transparent;}
  .vt-btn+.vt-btn{border-left:1px solid var(--line);}
  .vt-btn.on{background:var(--blue);color:#fff;}
  /* 月度日历 */
  .plan-cal{max-height:none;}
  .cal-month{border:1px solid var(--line);border-radius:12px;padding:10px;margin-bottom:12px;background:#fff;}
  .cal-title{font-size:14px;font-weight:700;margin-bottom:8px;color:var(--ink);}
  .cal-week{display:grid;grid-template-columns:repeat(7,1fr);gap:4px;margin-bottom:4px;}
  .cal-week span{text-align:center;font-size:11px;color:var(--muted);padding:2px 0;}
  .cal-grid{display:grid;grid-template-columns:repeat(7,1fr);gap:4px;}
  .cal-cell{position:relative;min-height:58px;border:1px solid var(--line);border-radius:8px;padding:3px 4px 4px;background:#fff;cursor:pointer;-webkit-tap-highlight-color:transparent;display:flex;flex-direction:column;gap:1px;overflow:hidden;}
  .cal-cell.empty-cell{border:none;background:transparent;cursor:default;min-height:0;}
  .cal-cell.blank{background:#f8fafc;cursor:default;color:var(--muted);}
  .cal-cell.dim{opacity:.35;}
  .cal-cell.done{background:#f0fdf4;border-color:#bbf7d0;}
  .cal-cell.today{border-color:var(--blue);box-shadow:0 0 0 2px var(--blue-soft);}
  .cal-cell .cd{font-size:11px;font-weight:700;color:#475569;font-variant-numeric:tabular-nums;line-height:1.2;}
  .cal-cell .cbar2{display:block;height:3px;border-radius:2px;margin:1px 0 2px;}
  .cal-cell .cs{font-size:10.5px;font-weight:600;color:var(--ink);line-height:1.25;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}
  .cal-cell .cl{font-size:9.5px;color:var(--muted);line-height:1.2;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}
  .cal-cell .ck{position:absolute;top:2px;right:4px;font-size:10px;color:var(--green);font-weight:700;}
  .cal-detail-holder{display:flex;flex-direction:column;gap:10px;}
  .cal-detail{border:1px solid var(--blue);border-radius:12px;background:#fbfdff;overflow:hidden;}
  .cd-hd{display:flex;align-items:center;justify-content:space-between;gap:8px;padding:9px 12px;background:var(--blue-soft);}
  .cd-hd b{font-size:14px;color:var(--ink);}
  .cd-close{appearance:none;border:1px solid var(--line);background:#fff;border-radius:8px;font-size:12px;color:var(--muted);min-height:32px;padding:0 10px;cursor:pointer;}
  @media(max-width:768px){
    .cal-cell{min-height:52px;padding:2px 3px 3px;}
    .cal-cell .cs{font-size:9.5px;}
    .cal-cell .cl{display:none;}
    .cal-month{padding:8px 6px;}
    .cal-grid,.cal-week{gap:3px;}
  }
  .plan-list{max-height:560px;overflow:auto;border:1px solid var(--line);border-radius:10px;padding:4px;background:#fff;}
  .day-card{border:1px solid var(--line);border-radius:10px;margin-bottom:6px;overflow:hidden;background:#fff;}
  .day-card.done{opacity:.8;}
  .day-card.today-hl{border-color:var(--blue);box-shadow:0 0 0 2px var(--blue-soft);}
  .day-head{display:flex;align-items:center;gap:8px;padding:10px 12px;cursor:pointer;-webkit-tap-highlight-color:transparent;}
  .day-head:hover{background:#f8fafc;}
  .day-date{font-variant-numeric:tabular-nums;font-weight:700;color:var(--ink);min-width:46px;flex:none;}
  .day-tag{flex:none;}
  .day-chap{flex:1;min-width:0;font-size:14px;color:var(--ink);overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}
  .day-status{font-size:13px;min-width:56px;text-align:right;flex:none;}
  .day-status .ok{color:var(--green);} .day-status .warn{color:var(--amber);} .day-status .muted{color:var(--muted);}
  .day-caret{color:var(--muted);transition:transform .15s;font-size:12px;flex:none;}
  .day-detail{padding:10px 12px 14px;border-top:1px dashed var(--line);}
  @media(max-width:640px){
    .day-head{flex-wrap:wrap;}
    .day-chap{order:3;flex-basis:100%;white-space:normal;}
    .day-status{order:2;margin-left:auto;}
    .day-caret{order:4;}
  }

  .qs{margin:8px 0 4px 0;padding:8px 10px;background:#f0fdf4;border:1px solid #bbf7d0;border-radius:8px;}
  .qs>b{color:#15803d;}
  .q{margin:4px 0;}
  .q-h{background:none;border:none;color:#166534;font-size:13.5px;cursor:pointer;padding:3px 0;text-align:left;width:100%;}
  .q-b{display:none;padding:6px 8px 8px 22px;font-size:13.5px;line-height:1.7;color:#334155;}
  .qa{color:#0f766e;}
  .qa>b{color:#0f766e;}
  .q-opts{margin:2px 0 4px 18px;font-size:13.5px;line-height:1.65;color:#334155;}
  .q-opts .opt{margin:2px 0;display:flex;align-items:flex-start;gap:2px;}
  .q .qidx{color:#15803d;font-weight:700;margin-right:2px;}
  .q-b .qa{margin-top:6px;color:#15803d;font-weight:600;}
  .q-b .qe{margin-top:4px;color:#334155;line-height:1.7;}
  .q-b .qsrc{margin-top:4px;color:#94a3b8;font-size:12px;}
  /* ===== 挑战模块 ===== */
  .chal{margin-top:14px;border:1.5px solid #fdba74;background:linear-gradient(180deg,#fff7ed,#fffbf6);border-radius:12px;padding:12px;}
  .chal-hd{display:flex;align-items:center;gap:8px;flex-wrap:wrap;margin-bottom:10px;}
  .chal-badge{background:#ea580c;color:#fff;font-weight:700;font-size:13px;padding:4px 11px;border-radius:999px;white-space:nowrap;}
  .chal-sub{font-size:12.5px;color:#9a3412;line-height:1.6;}
  .chal-item{background:#fff;border:1px solid #fed7aa;border-radius:10px;padding:10px 12px;margin-bottom:8px;}
  .chal-no{margin-left:6px;font-size:12px;color:#ea580c;font-weight:700;}
  .chal-act{display:flex;gap:8px;flex-wrap:wrap;align-items:center;margin-top:2px;}
  .chal-done{color:#15803d;font-weight:700;font-size:14px;}
  .chal-trigger{margin-top:12px;border:1.5px dashed #f59e0b;background:#fffbeb;border-radius:12px;padding:14px;}
  .ct-t{font-weight:700;font-size:15.5px;color:#b45309;margin-bottom:6px;}
  .ct-d{font-size:13.5px;color:#78350f;line-height:1.75;margin-bottom:10px;}
  .chal-flag{color:#ea580c;font-weight:700;margin-left:4px;}/* —— 日历视图：滚动容器 / 单元格章节 / 内联展开详情 —— */
.cal-scroll{position:relative;max-height:60vh;overflow-y:auto;-webkit-overflow-scrolling:touch;padding:2px 6px 2px 0;margin-top:4px;}
.cal-cell .cchap{display:block;font-size:11px;line-height:1.2;color:#475569;margin-top:3px;max-width:100%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}
.cal-cell.dim .cchap{color:#94a3b8;}
.cal-cell.done .cchap{color:#64748b;}
.cal-detail{margin:6px 2px 14px;padding:10px 12px;background:#f8fafc;border:1px solid #e2e8f0;border-left:4px solid var(--blue);border-radius:10px;}
.cal-detail .cd-hd{display:flex;justify-content:space-between;align-items:center;margin-bottom:6px;}
.cal-detail .cd-close{border:none;background:#e2e8f0;color:#475569;border-radius:8px;padding:4px 10px;font-size:12px;cursor:pointer;min-height:32px;}
  .quiz-in-plan{margin-top:8px;}

/* ===== 今日三道题卡片折叠（原仅内联于 index.html，重构后统一收进 app.css） ===== */
  #quizCard h2.collapsible{cursor:pointer;user-select:none;display:flex;align-items:center;justify-content:space-between;gap:8px}
  #quizCard h2.collapsible .ct-ico{display:inline-flex;align-items:center;gap:8px}
  #quizCard h2.collapsible .chev{transition:transform .2s ease;flex:0 0 auto}
  #quizCard.collapsed #quizBody{display:none}
  #quizCard.collapsed h2.collapsible .chev{transform:rotate(-90deg)}
  .quiz-in-plan .qip-h{cursor:pointer;user-select:none;display:flex;align-items:center;justify-content:space-between;gap:8px;margin-top:4px}
  .quiz-in-plan .qip-h .caret{transition:transform .2s ease;opacity:.7}
  .quiz-in-plan.collapsed .qip-body{display:none}
  .quiz-in-plan.collapsed .qip-h .caret{transform:rotate(-90deg)}
  .qs .qs-h{cursor:pointer;user-select:none;display:flex;align-items:center;justify-content:space-between;gap:8px;margin-top:4px}
  .qs .qs-h .caret{transition:transform .2s ease;opacity:.7}
  .qs.collapsed .qs-body{display:none}
  .qs.collapsed .qs-h .caret{transform:rotate(-90deg)}

/* ===== 重构：视图按学习需求切换（非一股脑单页） ===== */
.sec{display:none}
.sec.in-view{display:block}
#boot{position:fixed;inset:0;background:#f7f8fa;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:16px;z-index:9998;color:#64748b;font:15px/1.5 system-ui,sans-serif}
#boot.hide{display:none}
#boot .spinner{width:36px;height:36px;border:3px solid #cbd5e1;border-top-color:#2563eb;border-radius:50%;animation:spin .8s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}
.bottomtab{position:fixed;left:0;right:0;bottom:0;display:flex;background:#fff;border-top:1px solid #e5e7eb;z-index:50;padding-bottom:env(safe-area-inset-bottom)}
.bottomtab a{flex:1;text-align:center;padding:8px 0 6px;color:#64748b;text-decoration:none;font-size:12px;display:flex;flex-direction:column;align-items:center;gap:2px}
.bottomtab a .ico{font-size:18px;line-height:1}
.bottomtab a.active{color:#2563eb;font-weight:600}
body{padding-bottom:66px}