:root{
    --primary:#FF9F43;
    --primary-d:#F0820F;
    --blue:#5B8DEF;
    --green:#2ECC71;
    --green-d:#27AE60;
    --bg:#FFF8EF;
    --card:#FFFFFF;
    --text:#3A3A3A;
    --muted:#9A9A9A;
    --line:#F0E6D6;
    --red:#FF5B5B;
    --accent:#7C5CFC;
    --shadow:0 4px 16px rgba(255,159,67,.12);
  }
  *{box-sizing:border-box;-webkit-tap-highlight-color:transparent;}
  html,body{margin:0;padding:0;}
  body{
    font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"PingFang SC","Microsoft YaHei",sans-serif;
    background:var(--bg);color:var(--text);line-height:1.5;
    font-size:17px;
    overscroll-behavior:none;        /* 禁用平板下拉刷新 / 边缘回弹 */
    touch-action:pan-y;              /* 只允许竖向滑动，避免误触手势 */
    -webkit-text-size-adjust:100%;
  }
  .topbar{
    position:sticky;top:0;z-index:30;background:#fff;border-bottom:1px solid var(--line);
    display:flex;align-items:center;justify-content:space-between;padding:12px 16px;
    padding-top:max(12px,env(safe-area-inset-top));
  }
  .brand{display:flex;align-items:center;gap:8px;font-weight:800;font-size:19px;color:var(--primary-d);}
  .brand svg{width:26px;height:26px;}
  .top-actions{display:flex;gap:8px;align-items:center;}
  .iconbtn{
    border:none;background:#FFF3E0;color:var(--primary-d);border-radius:12px;
    min-height:44px;min-width:44px;padding:0 12px;font-size:14px;font-weight:700;cursor:pointer;
    display:flex;align-items:center;gap:6px;
  }
  .iconbtn svg{width:20px;height:20px;}
  .iconbtn.ghost{background:#F2F4F8;color:#5A6B85;}

  .account{display:flex;align-items:center;gap:6px;font-size:13px;color:var(--muted);font-weight:700;white-space:nowrap;}
  .account .mini{min-height:32px;padding:0 8px;font-size:12px;}

  .banner{
    background:#FFF1D6;color:#B5740A;border:1px solid #F3D79A;border-radius:12px;
    padding:10px 14px;margin:12px 14px;font-size:14px;font-weight:600;
  }

  /* layout */
  .app{display:flex;min-height:calc(100vh - 60px);}
  .sidenav{
    width:120px;flex:0 0 120px;background:#fff;border-right:1px solid var(--line);
    padding:14px 8px;display:flex;flex-direction:column;gap:8px;
  }
  .navitem{
    border:none;background:transparent;color:var(--muted);border-radius:14px;
    min-height:50px;padding:10px 6px;font-size:15px;font-weight:700;cursor:pointer;
    display:flex;flex-direction:column;align-items:center;gap:4px;
  }
  .navitem svg{width:24px;height:24px;}
  .navitem.active{background:var(--primary);color:#fff;box-shadow:var(--shadow);}
  .content{flex:1;padding:16px 18px 110px;max-width:920px;margin:0 auto;width:100%;}

  .section-title{font-size:20px;font-weight:800;margin:6px 0 12px;display:flex;align-items:center;gap:8px;}
  .section-title .tag{font-size:12px;font-weight:700;color:#fff;background:var(--blue);border-radius:8px;padding:2px 8px;}

  .card-box{background:var(--card);border-radius:18px;box-shadow:var(--shadow);padding:16px;margin-bottom:16px;border:1px solid var(--line);}

  /* progress ring */
  .ring-wrap{display:flex;align-items:center;gap:16px;}
  .ring{width:104px;height:104px;flex:0 0 104px;}
  .ring text{font-size:20px;font-weight:800;fill:var(--primary-d);}
  .ring-info{flex:1;}
  .ring-info .big{font-size:22px;font-weight:800;}
  .ring-info .sub{color:var(--muted);font-size:14px;margin-top:2px;}

  /* char cards */
  .carry{background:#FFECEC;border:1px dashed var(--red);border-radius:14px;padding:10px 14px;margin-bottom:12px;font-size:14px;font-weight:700;color:var(--red);display:flex;align-items:center;gap:8px;}
  /* ===== 任务卡片 ===== */
  .task-card{background:#fff;border:1px solid var(--line);border-left-width:5px;border-radius:14px;padding:12px 14px;margin-bottom:10px;}
  .task-card.bd-orange{border-left-color:#FF9F43;}
  .task-card.bd-red{border-left-color:var(--red);background:#FFF6F6;}
  .task-card.bd-blue{border-left-color:var(--accent);background:#F4F9FF;}
  .task-card.bd-green{border-left-color:var(--green);background:#F3FBF2;}
  .task-card.bd-gray{border-left-color:var(--muted);background:#FAFAFA;}
  .task-head{display:flex;align-items:center;justify-content:space-between;gap:8px;}
  .task-title{font-size:16px;font-weight:800;color:var(--primary-d);}
  .task-kind{display:inline-block;font-size:11px;font-weight:700;line-height:1;padding:3px 7px;border-radius:999px;background:#F0ECFF;color:#6B4FE0;margin-right:7px;vertical-align:middle;}
  .task-badge{font-size:12px;font-weight:700;padding:3px 8px;border-radius:999px;white-space:nowrap;}
  .task-badge.bd-orange{background:#FFF1E0;color:#D97314;}
  .task-badge.bd-red{background:#FFE3E3;color:var(--red);}
  .task-badge.bd-blue{background:#E6F0FF;color:var(--accent);}
  .task-badge.bd-green{background:#E3F7E1;color:var(--green);}
  .task-badge.bd-gray{background:#EFEFEF;color:var(--muted);}
  .task-detail{font-size:14px;color:var(--text);margin-top:6px;line-height:1.5;}
  .task-meta{font-size:12px;color:var(--muted);margin-top:6px;}
  .task-actions{display:flex;gap:8px;margin-top:10px;align-items:center;}
  .task-actions .tasknote{flex:1;min-height:42px;font-size:15px;border-radius:10px;border:1px solid var(--line);padding:0 10px;}
  .task-actions .btn{white-space:nowrap;min-height:42px;}
  .carry svg{width:18px;height:18px;}
  .grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(140px,1fr));gap:14px;}
  .flip{height:170px;perspective:1000px;cursor:pointer;}
  .flip-inner{position:relative;width:100%;height:100%;transition:transform .55s;transform-style:preserve-3d;}
  .flip.flipped .flip-inner{transform:rotateY(180deg);}
  .face{position:absolute;inset:0;backface-visibility:hidden;border-radius:16px;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:10px;box-shadow:var(--shadow);border:1px solid var(--line);}
  .front{background:linear-gradient(160deg,#FFF6E9,#FFE9CC);}
  .front .ch{font-size:60px;font-weight:800;color:var(--primary-d);line-height:1;}
  .front .py{margin-top:6px;color:#C98A3A;font-size:15px;font-weight:700;}
  .front .hint{margin-top:8px;font-size:12px;color:var(--muted);}
  .back{background:#fff;transform:rotateY(180deg);}
  .back .picto{width:70px;height:70px;}
  .back .mean{font-size:14px;font-weight:700;margin-top:4px;text-align:center;}
  .back .words{font-size:12px;color:var(--muted);margin-top:2px;text-align:center;}
  .flip.done .front{background:linear-gradient(160deg,#E9FBF1,#D6F5E3);}
  .donebadge{position:absolute;top:8px;right:8px;background:var(--green);color:#fff;border-radius:10px;font-size:11px;font-weight:800;padding:3px 7px;display:flex;align-items:center;gap:3px;}
  .donebadge svg{width:12px;height:12px;}
  .markbtn{
    margin-top:8px;border:none;background:var(--green);color:#fff;border-radius:12px;
    min-height:50px;padding:0 14px;font-size:14px;font-weight:800;cursor:pointer;
  }
  .markbtn:disabled{background:#CFE9D8;color:#7FB89A;cursor:default;}

  /* 听写卡片 */
  .diccard{height:170px;border-radius:16px;background:linear-gradient(160deg,#FFF6E9,#FFE9CC);border:1px solid var(--line);box-shadow:var(--shadow);display:flex;flex-direction:column;align-items:center;justify-content:center;padding:10px;cursor:pointer;transition:transform .15s;}
  .diccard:active{transform:scale(.97);}
  .diccard .dch{font-size:64px;font-weight:800;color:var(--primary-d);line-height:1;}
  .diccard .dinfo{margin-top:6px;text-align:center;}
  .diccard .dpy{color:#C98A3A;font-size:15px;font-weight:700;}
  .diccard .dw{color:var(--muted);font-size:13px;margin-top:2px;}
  .diccard .dhint{margin-top:8px;font-size:12px;color:var(--muted);}
  .diccard.revealed{background:linear-gradient(160deg,#E9FBF1,#D6F5E3);}

  /* form controls */
  label{display:block;font-size:14px;font-weight:700;margin:10px 0 6px;color:#6B6B6B;}
  input[type=text],input[type=number],input[type=password],textarea,select{
    width:100%;font-size:16px;padding:12px 14px;border:1.5px solid var(--line);border-radius:12px;
    background:#fff;color:var(--text);font-family:inherit;
  }
  textarea{resize:vertical;min-height:60px;}
  .btn{
    border:none;background:var(--primary);color:#fff;border-radius:14px;min-height:50px;padding:0 20px;
    font-size:16px;font-weight:800;cursor:pointer;box-shadow:var(--shadow);
  }
  .btn.blue{background:var(--blue);}
  .btn.green{background:var(--green);}
  .btn.ghost{background:#F2F4F8;color:#5A6B85;box-shadow:none;}
  .btn.orange{background:#FF9F43;color:#fff;}
  .drow{display:flex;align-items:center;gap:10px;margin:10px 0;}
  .didx{width:22px;color:#8A97A8;font-weight:700;flex:none;}
  .dblank{flex:1;border:2px solid #E3E8F0;border-radius:12px;padding:12px;font-size:20px;outline:none;min-height:44px;}
  .dblank:focus{border-color:#FF9F43;}
  .dresult{font-size:15px;min-width:96px;flex:none;}
  .dresult.ok{color:#27AE60;}
  .dresult.no{color:#E74C3C;}
  .btn.red{background:var(--red);}
  .btn:active{transform:translateY(1px);}
  .row{display:flex;gap:10px;flex-wrap:wrap;}
  .row .btn{flex:1;}

  .chips{display:flex;gap:8px;flex-wrap:wrap;margin:8px 0;}
  .chip{border:2px solid var(--line);background:#fff;border-radius:12px;min-height:48px;padding:0 14px;font-size:18px;font-weight:800;color:var(--text);cursor:pointer;display:flex;align-items:center;}
  .chip.active{border-color:var(--primary);background:#FFF3E0;color:var(--primary-d);}

  .feedback{margin-top:12px;padding:12px 14px;border-radius:12px;font-weight:700;font-size:15px;display:none;}
  .feedback.ok{display:block;background:#E9FBF1;color:var(--green-d);}
  .feedback.no{display:block;background:#FFEFEF;color:var(--red);}

  /* level */
  .level-card{background:linear-gradient(135deg,#FFF3E0,#FFE0C2);border-radius:18px;padding:18px;text-align:center;box-shadow:var(--shadow);}
  .level-badge{font-size:46px;font-weight:900;color:var(--primary-d);}
  .level-title{font-size:20px;font-weight:800;margin-top:2px;}
  .level-pts{font-size:15px;color:#B5740A;margin-top:4px;font-weight:700;}
  .bar{height:16px;background:#F0E6D6;border-radius:10px;overflow:hidden;margin-top:12px;}
  .bar > i{display:block;height:100%;background:linear-gradient(90deg,var(--primary),var(--green));border-radius:10px;transition:width .4s;}

  .reward{display:flex;align-items:center;gap:12px;border:1px solid var(--line);border-radius:14px;padding:12px;margin-bottom:10px;background:#fff;}
  .reward .ico{width:46px;height:46px;flex:0 0 46px;border-radius:12px;background:#FFF3E0;display:flex;align-items:center;justify-content:center;}
  .reward .ico svg{width:26px;height:26px;}
  .reward .info{flex:1;}
  .reward .nm{font-weight:800;font-size:16px;}
  .reward .ds{font-size:13px;color:var(--muted);}
  .reward .cost{font-weight:800;color:var(--primary-d);font-size:15px;white-space:nowrap;}
  .reward .st{font-size:12px;font-weight:700;padding:3px 8px;border-radius:8px;}
  .st.pending{background:#FFF1D6;color:#B5740A;}
  .st.approved{background:#E9FBF1;color:var(--green-d);}

  /* parent list */
  .plist{display:flex;flex-direction:column;gap:8px;}
  .pitem{display:flex;align-items:center;gap:10px;border:1px solid var(--line);border-radius:12px;padding:10px 12px;background:#fff;}
  .pitem .ch{font-size:30px;font-weight:800;color:var(--primary-d);width:46px;text-align:center;}
  .pitem .meta{flex:1;font-size:14px;}
  .pitem .meta b{font-size:15px;}
  .pitem .meta span{color:var(--muted);}
  .mini{border:none;background:#F2F4F8;color:#5A6B85;border-radius:10px;min-height:40px;padding:0 12px;font-size:13px;font-weight:700;cursor:pointer;}
  .mini.red{background:#FFEFEF;color:var(--red);}

  /* bottom nav (mobile) */
  .bottomnav{
    display:none;position:fixed;left:0;right:0;bottom:0;z-index:30;background:#fff;border-top:1px solid var(--line);
    padding-bottom:env(safe-area-inset-bottom);
    grid-template-columns:repeat(4,1fr);
  }
  .bottomnav .navitem{border-radius:0;min-height:56px;}

  /* modal */
  .mask{position:fixed;inset:0;background:rgba(0,0,0,.4);z-index:50;display:none;align-items:center;justify-content:center;padding:20px;}
  .mask.show{display:flex;}
  .modal{background:#fff;border-radius:20px;padding:22px;width:100%;max-width:360px;box-shadow:0 10px 40px rgba(0,0,0,.2);}
  .modal h3{margin:0 0 14px;font-size:19px;font-weight:800;}
  .pwdrow{display:flex;gap:10px;justify-content:center;margin:10px 0 16px;}
  .pwdrow input{width:54px;height:64px;text-align:center;font-size:30px;font-weight:800;border:2px solid var(--line);border-radius:14px;}
  .msg{font-size:13px;color:var(--red);min-height:18px;text-align:center;margin-bottom:8px;}

  /* drawer */
  .drawer{position:fixed;top:0;right:0;bottom:0;width:88%;max-width:340px;background:#fff;z-index:60;transform:translateX(100%);transition:transform .3s;box-shadow:-6px 0 30px rgba(0,0,0,.15);display:flex;flex-direction:column;}
  .drawer.show{transform:translateX(0);}
  .drawer .dh{display:flex;align-items:center;justify-content:space-between;padding:16px;border-bottom:1px solid var(--line);font-weight:800;font-size:17px;}
  .drawer .db{padding:16px;overflow:auto;flex:1;}
  .overlay{position:fixed;inset:0;background:rgba(0,0,0,.3);z-index:55;display:none;}
  .overlay.show{display:block;}
  .note{font-size:13px;color:var(--muted);margin-top:6px;}

  /* math tab */
  .mathlist{display:flex;flex-direction:column;gap:12px;margin-top:4px;}
  .mathrow{display:flex;align-items:center;gap:10px;background:#fff;border:1px solid var(--line);border-radius:14px;padding:12px 14px;flex-wrap:wrap;}
  .mathrow.done{background:#F1FBF3;border-color:#BFE9C8;}
  .mathrow .mq{font-size:24px;font-weight:800;min-width:96px;}
  .mathinp{width:84px;height:48px;font-size:22px;text-align:center;border:2px solid var(--line);border-radius:12px;}
  .mathfb{font-size:13px;font-weight:700;flex-basis:100%;min-height:16px;}
  .mathfb.no{color:var(--red);}
  select{width:100%;min-height:48px;font-size:16px;border:2px solid var(--line);border-radius:12px;padding:0 12px;background:#fff;color:#33405A;}
  input[type=number]{font-size:16px;}

  @media(max-width:768px){
    .app{display:block;}
    .sidenav{display:none;}
    .content{padding:14px 14px 90px;}
    .bottomnav{display:grid;}
    .grid{grid-template-columns:repeat(auto-fill,minmax(120px,1fr));gap:10px;}
    .flip{height:160px;}
    .front .ch{font-size:52px;}
  }
  /* 隐藏积分输入框的上下箭头 */
  input.costinp::-webkit-outer-spin-button,
  input.costinp::-webkit-inner-spin-button{ -webkit-appearance:none; margin:0; }
  input.costinp{ -moz-appearance:textfield; appearance:textfield; }

  /* 组词卡片 */
  .wordlist{display:flex;flex-direction:column;gap:12px;margin-top:4px;}
  .wordcard{background:#fff;border:1px solid var(--line);border-radius:14px;padding:12px 14px;}
  .wordcard.done{background:#F1FBF3;border-color:#BFE9C8;}
  .whead{display:flex;align-items:baseline;gap:8px;margin-bottom:8px;}
  .wch{font-size:24px;font-weight:800;}
  .wpy{font-size:14px;color:var(--muted);}
  .wrow{display:flex;align-items:center;gap:10px;flex-wrap:wrap;}
  .wordinp{flex:1;min-width:140px;min-height:48px;font-size:17px;padding:10px 12px;border:2px solid var(--line);border-radius:12px;}
  .wfb{font-size:13px;font-weight:700;min-height:16px;margin-top:8px;}
  .wfb.no{color:var(--red);}
  .wfb.ok{color:#2EA84F;}
  .wex{font-size:13px;color:var(--muted);margin-top:4px;}