:root{
  --bg:#f5f7fa; --card:#ffffff; --line:#dce2ea; --line2:#c8d0dc; --text:#172033; --muted:#526071;
  --accent:#356fe5; --accent-hover:#285fcf; --accent-weak:#edf3ff; --accent-soft:#dce7ff;
  --green:#1f8a62; --green-weak:#e9f7f1; --red:#c33a32; --red-weak:#fff0ee;
  --amber:#b46a0c; --amber-weak:#fff5e5; --purple:#6d5ae0; --purple-weak:#f0edfe;
  --radius:8px; --radius-control:6px; --radius-question:12px;
  --control-h:40px; --control-compact:36px; --control-touch:44px;
  --shadow:0 1px 2px rgba(23,32,64,.05), 0 8px 24px rgba(23,32,64,.04);
  --shadow-lg:0 24px 72px rgba(20,30,45,.18);
  --heat-0:#eef1f8; --heat-1:#d4def8; --heat-2:#a9bef5; --heat-3:#6f8ff0; --heat-4:#3d63ea;
  --m-none:#ffffff; --m-correct:#9edcb8; --m-wrong:#b46a0c; --m-no:#c33a32; --m-mastered:#1f8a62;
  --topbar-h:56px; --sb-w:228px;
}
html[data-theme="dark"]{
  --bg:#0e1117; --card:#171b24; --line:#262c3a; --line2:#313a4c; --text:#e8ecf4; --muted:#8b95a9;
  --accent:#7c9cff; --accent-hover:#91abff; --accent-weak:#232a3f; --accent-soft:#1e2740;
  --green:#4cc38a; --green-weak:#143026; --red:#ff7b7f; --red-weak:#331c1e;
  --amber:#f5b64d; --amber-weak:#342a18; --purple:#b197fc; --purple-weak:#262040;
  --shadow:0 1px 2px rgba(0,0,0,.3), 0 8px 24px rgba(0,0,0,.22);
  --shadow-lg:0 10px 30px rgba(0,0,0,.5);
  --heat-0:#232936; --heat-1:#2c3f6e; --heat-2:#3a55a0; --heat-3:#356fd6; --heat-4:#4d7bff;
  --m-none:#2a2f3a; --m-correct:#1f5c43; --m-wrong:#d99a2b; --m-no:#e2544b; --m-mastered:#27a57c;
}
*{box-sizing:border-box; margin:0; padding:0}
html,body{height:100%}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans CJK SC",sans-serif; background:var(--bg); color:var(--text); font-size:15px; line-height:1.6; -webkit-font-smoothing:antialiased}
button{font-family:inherit; cursor:pointer; border:none; background:none; color:inherit}
input,textarea{font-family:inherit}
a{color:var(--accent); text-decoration:none}

/* ===== 顶栏 ===== */
#topbar{position:fixed; top:0; left:0; right:0; height:var(--topbar-h); background:var(--card); border-bottom:1px solid var(--line); display:flex; align-items:center; gap:8px; padding:0 14px; z-index:80; box-shadow:0 1px 0 rgba(0,0,0,.02)}
#topbar{box-shadow:none; border-bottom-color:var(--line); padding-inline:16px}
#topbar .brand{font-weight:800; font-size:20px; color:var(--accent); white-space:nowrap; cursor:pointer; letter-spacing:-.02em; display:flex; align-items:baseline; gap:8px}
#topbar .brand small{font-weight:400; font-size:11px; color:var(--muted)}
#topbar .spacer{flex:1}
#topbar .stats{display:flex; gap:16px; font-size:13px; color:var(--muted); align-items:center; white-space:nowrap}
#topbar .stats b{color:var(--text); font-variant-numeric:tabular-nums}
#menuBtn{display:none; padding:5px 11px; font-size:15px; border-radius:var(--radius-control); border:1px solid var(--line); background:var(--card)}
#menuBtn:hover{border-color:var(--accent); color:var(--accent)}
.icon-btn{width:34px; height:34px; border-radius:var(--radius-control); border:1px solid var(--line); background:var(--card); font-size:15px; display:flex; align-items:center; justify-content:center}
.icon-btn:hover{border-color:var(--accent); background:var(--accent-weak)}
#topbar .btn.small{padding:5px 12px}

/* ===== 设置弹层 ===== */
.popover{position:absolute; top:calc(100% + 8px); right:8px; width:430px; max-width:96vw; max-height:calc(100vh - var(--topbar-h) - 24px); overflow-y:auto; overscroll-behavior:contain; scrollbar-width:thin; background:var(--card); border:1px solid var(--line); border-radius:10px; box-shadow:var(--shadow-lg); padding:14px 16px; z-index:90}
.settings-panel{width:560px; max-width:96vw}
.pop-title{font-size:15px; font-weight:700; margin-bottom:6px}
.settings-tabs{display:flex; flex-wrap:wrap; gap:6px; position:sticky; top:-14px; z-index:2; padding:10px 0; margin:-10px 0 4px; background:var(--card)}
.settings-tab{min-height:30px; padding:5px 11px; border:1px solid var(--line); border-radius:999px; background:var(--card); color:var(--muted); font-size:12.5px; white-space:nowrap}
.settings-tab:hover{border-color:var(--accent); color:var(--accent)}
.settings-tab.active{background:var(--accent); border-color:var(--accent); color:#fff; font-weight:700}
.settings-tab-page[hidden]{display:none}
.settings-section{margin:4px 0; padding-top:12px; border-top:1px solid var(--line)}
.settings-section:first-of-type{border-top:0; padding-top:0}
.settings-section-title{font-size:13px; font-weight:800; color:var(--accent); margin-bottom:6px}
.settings-sub-title{font-size:12px; font-weight:700; color:var(--muted); margin:12px 0 2px}
.pet-control-row{display:grid; grid-template-columns:minmax(0,1fr) auto; gap:12px; align-items:end; margin:6px 0 2px}
.pet-scale-field{grid-template-columns:1fr; margin:8px 0 0}
.pet-scale-row{display:flex; align-items:center; gap:10px}
.pet-scale-row input[type=range]{flex:1; min-width:0; min-height:30px; accent-color:var(--accent)}
.pet-scale-row output{min-width:44px; text-align:right; font-variant-numeric:tabular-nums; color:var(--text); font-size:13px; font-weight:700}
.settings-section .pop-sep{margin:12px 0}
.ai-field{display:grid; gap:5px; margin:8px 0}
.ai-field>span:first-child{font-size:12px; color:var(--muted); font-weight:600}
.ai-field input,.ai-field select{min-height:34px; width:100%; padding:0 10px; border:1px solid var(--line); border-radius:var(--radius-control); background:var(--bg); color:var(--text); font-size:13px; outline:none}
.ai-field input:focus,.ai-field select:focus{border-color:var(--accent); background:var(--card)}
.ai-model-row{display:flex; gap:6px}
.ai-model-row input{flex:1; min-width:0}
.ai-model-row .btn{flex:none}
.ai-actions{display:flex; gap:8px; margin:10px 0 6px}
.ai-status{font-size:12px; line-height:1.6; min-height:18px}
.ai-status.ok{color:var(--green)}
.ai-status.err{color:var(--red)}
.ai-capture{position:fixed; inset:0; z-index:120; background:rgba(15,23,42,.48); display:flex; align-items:center; justify-content:center; padding:20px}
.ai-capture[hidden]{display:none}
.ai-capture-card{width:min(860px, 96vw); max-height:92vh; overflow:auto; background:var(--card); border:1px solid var(--line); border-radius:12px; box-shadow:var(--shadow-lg); padding:18px; display:grid; gap:14px}
.ai-capture-head{display:flex; align-items:flex-start; justify-content:space-between; gap:12px}
.ai-capture-head strong{font-size:18px}
.ai-capture-head span{display:block; font-size:12px; color:var(--muted); margin-top:2px}
.ai-capture-body{display:grid; grid-template-columns:minmax(0,1fr) 250px; gap:16px}
.ai-capture-upload{min-width:0}
.upload-zone{min-height:150px; border:1.5px dashed var(--line2); border-radius:10px; background:var(--bg); display:grid; align-content:center; justify-items:center; gap:6px; cursor:pointer; text-align:center; padding:16px}
.upload-zone:hover{border-color:var(--accent); background:var(--accent-weak)}
.upload-zone input{display:none}
.upload-main{font-size:14px; font-weight:700}
.upload-sub{font-size:12px; color:var(--muted)}
.ai-previews{display:grid; grid-template-columns:repeat(auto-fill,minmax(120px,1fr)); gap:8px; margin-top:10px}
.ai-previews img{width:100%; height:92px; object-fit:cover; border:1px solid var(--line); border-radius:6px; background:var(--bg)}
.ai-capture-side{display:grid; gap:8px; align-content:start}
.ai-result{width:100%; min-height:190px; resize:vertical; padding:10px 12px; border:1px solid var(--line); border-radius:var(--radius-control); background:var(--bg); color:var(--text); font-size:12.5px; font-family:Consolas,Monaco,monospace; line-height:1.55; outline:none}
.ai-result:focus{border-color:var(--accent); background:var(--card)}
.ai-clipboard{width:100%; min-height:74px; resize:vertical; margin-top:10px; padding:9px 11px; border:1px solid var(--line); border-radius:var(--radius-control); background:var(--bg); color:var(--text); font-size:12.5px; line-height:1.5; outline:none}
.ai-clipboard:focus{border-color:var(--accent); background:var(--card)}
.ai-capture-upload .btn{margin-top:6px}
.ai-manual-category,.ai-proposal{margin-top:4px; padding:12px; border:1px solid var(--line); border-radius:8px; background:var(--bg)}
.ai-category-grid{display:grid; grid-template-columns:repeat(3,minmax(0,1fr)); gap:8px; margin-top:8px}
.ai-category-grid select{min-width:0; width:100%; min-height:34px; padding:0 9px; border:1px solid var(--line); border-radius:var(--radius-control); background:var(--card); color:var(--text); font-size:12.5px}
.ai-proposal{border-color:var(--accent-soft); background:var(--accent-weak)}
.ai-proposal-head{font-size:13px; font-weight:700; color:var(--accent); margin-bottom:8px}
.ai-proposal-body{display:grid; gap:8px; font-size:13px; color:var(--text)}
.ai-proposal-item{padding:8px 10px; border:1px solid var(--line); border-radius:6px; background:var(--card)}
.ai-proposal-item b{display:block; margin-bottom:3px}
.ai-proposal-item span{color:var(--muted); font-size:12.5px; white-space:pre-wrap}
@media (max-width:700px){
  .ai-capture-body{grid-template-columns:1fr}
  .ai-category-grid{grid-template-columns:1fr}
}
.switch-row{display:flex; align-items:center; justify-content:space-between; gap:12px; padding:10px 2px; border-top:1px solid var(--line); cursor:pointer}
.sr-label{font-size:14px; font-weight:600; line-height:1.4}
.sr-label small{display:block; font-weight:400; font-size:12px; color:var(--muted)}
.switch{appearance:none; -webkit-appearance:none; width:44px; height:24px; border-radius:12px; background:var(--line2); position:relative; cursor:pointer; transition:background .2s; flex:none}
.switch:checked{background:var(--accent)}
.switch:after{content:''; position:absolute; top:3px; left:3px; width:18px; height:18px; border-radius:50%; background:#fff; box-shadow:0 1px 3px rgba(0,0,0,.25); transition:left .2s}
.switch:checked:after{left:23px}
.pop-hint{font-size:12px; color:var(--muted); margin-top:8px; line-height:1.8}

.pop-sep{height:1px; background:var(--line); margin:10px 0}
.danger-btn{width:100%; padding:8px 10px; border-radius:var(--radius-control); border:1px solid var(--line); color:var(--muted); font-size:13px; background:var(--card); transition:all .12s}
.danger-btn:hover{border-color:var(--red); color:var(--red)}
.danger-btn.armed{background:var(--red); border-color:var(--red); color:#fff; font-weight:700}

/* ===== 布局 ===== */
#app{display:flex; height:calc(100vh - var(--topbar-h)); margin-top:var(--topbar-h); overflow:hidden}
#sidebar{position:fixed; left:0; top:var(--topbar-h); bottom:0; width:var(--sb-w); background:var(--card); border-right:1px solid var(--line); display:flex; flex-direction:column; overflow:hidden; padding:0 10px 10px; transform:translateX(-100%); transition:transform .22s ease; z-index:60}
#sidebar.open{transform:translateX(0); box-shadow:10px 0 30px rgba(15,23,42,.16)}
.sidebar-brand-row{flex:none; display:flex; align-items:baseline; gap:8px; min-height:54px; padding:0 12px; margin:0 -10px 10px; border-bottom:1px solid var(--line)}
.sidebar-brand{font-weight:800; font-size:21px; letter-spacing:-.02em; color:var(--accent); white-space:nowrap}
.sidebar-brand-sub{font-size:11px; color:var(--muted); white-space:nowrap}
#backdrop{position:fixed; inset:var(--topbar-h) 0 0 0; background:rgba(15,23,42,.42); z-index:55; opacity:0; pointer-events:none; transition:opacity .2s}
#backdrop.show{opacity:1; pointer-events:auto}
@media (min-width:901px){
  #app:not(.practice-mode) #sidebar{transform:translateX(0); box-shadow:none}
  #app:not(.practice-mode) #main{margin-left:var(--sb-w)}
}
#main{flex:1; overflow-y:auto; padding:22px 26px 90px; transition:margin-left .22s ease}
.wrap{max-width:960px; margin:0 auto}
@media (max-width:900px){
  #main{padding:14px 12px 80px}
  .card{padding:16px}
  #topbar .stats{display:none}
  .dashboard-hero{grid-template-columns:1fr}
  .dashboard-hero-cta{justify-content:flex-start}
  .home-metrics{grid-template-columns:1fr}
  .metric-item{border-left:0; border-top:1px solid var(--line)}
  .metric-item:first-child{border-top:0}
  .home-lower-grid{grid-template-columns:1fr}
}
/* ===== 侧栏模块 ===== */
.nav-modules{flex:none; display:flex; flex-direction:column; gap:2px; margin-bottom:10px; padding-bottom:10px; border-bottom:1px solid var(--line)}
.nav-mod{display:flex; align-items:center; gap:10px; min-height:38px; padding:8px 10px; border-radius:var(--radius-control); cursor:pointer; font-size:13px; color:var(--text); border:1px solid transparent; background:transparent; text-align:left; transition:background .12s}
.nav-mod:hover{background:var(--bg)}
.nav-mod.active{background:var(--accent-weak); border-color:var(--accent-soft); color:var(--accent); font-weight:600}
.nav-mod .ico{width:20px; text-align:center; font-size:15px; flex:none}
.nav-mod .ico svg{width:18px; height:18px; display:block; margin:0 auto}
.nav-mod .nm-name{flex:1}
.nav-mod .badge{min-width:19px; padding:0 6px; border-radius:999px; background:var(--accent); color:#fff; font-size:11px; text-align:center; line-height:19px; font-weight:700}
.nav-mod .badge.warn{background:var(--red)}
.bank-title{flex:none; display:flex; align-items:center; gap:8px; font-size:11px; color:var(--muted); font-weight:700; letter-spacing:.4px; margin:2px 2px 8px}
.bank-title .tree-tools{margin-left:auto; display:flex; gap:4px}
.bank-title .tree-tools .btn{padding:3px 8px; font-size:11.5px; border-radius:var(--radius-control)}
.bank-scope{flex:none; display:grid; grid-template-columns:repeat(3,minmax(0,1fr)); gap:2px; background:var(--bg); border:1px solid var(--line); border-radius:999px; padding:2px; margin-bottom:8px}
.scope-option{min-height:30px; border:0; border-radius:999px; background:transparent; color:var(--muted); font-size:13px; font-weight:600}
.scope-option:hover{color:var(--accent)}
.scope-option.active{background:var(--card); color:var(--accent); box-shadow:0 1px 2px rgba(23,32,64,.08)}
#searchBox{flex:none; width:100%; min-height:38px; padding:0 12px; border:1px solid var(--line); border-radius:var(--radius-control); background:var(--bg); color:var(--text); font-size:14px; margin-bottom:10px; outline:none; transition:border-color .15s}
#searchBox:focus{border-color:var(--accent); background:var(--card)}
#tree{flex:1 1 auto; min-height:0; overflow-y:auto; padding:0 2px 20px; scrollbar-width:thin; scrollbar-color:var(--line2) transparent}
#tree::-webkit-scrollbar{width:0;height:0;display:none}
.bank-group{margin:0; border:0; border-radius:0; overflow:visible; background:transparent}
.bank-group.g-math{--gc:#4f6ef2}
.bank-group.g-linear{--gc:#7c5ce0}
.bank-group.g-zhenti{--gc:#e8590c}
.bank-group.g-moni{--gc:#0ca678}
.bank-head{display:flex; align-items:center; gap:8px; min-height:36px; padding:0 8px; border-radius:var(--radius-control); cursor:pointer; user-select:none}
.bank-head:hover{background:var(--bg)}
.bank-head .arrow{font-size:10px; color:var(--muted); width:12px; flex:none; transition:transform .15s}
.bank-head .gt-badge{display:none}
.bank-head .gt-name{flex:1; font-weight:700; font-size:13px; min-width:0; overflow:hidden; text-overflow:ellipsis; white-space:nowrap}
.bank-head .gt-pb{color:var(--muted); font-size:11px; white-space:nowrap; font-variant-numeric:tabular-nums}
.bank-body{padding:0 0 6px 6px; border-top:0}
.chapter-block{margin-top:0}
#tree .folder>summary, #tree .folder>div.folder-head{list-style:none; display:flex; align-items:center; gap:6px; padding:6px 8px; border-radius:var(--radius-control); cursor:pointer; font-size:14px; color:var(--text); font-weight:600}
#tree .bank-body > details.folder > summary{font-size:14px; font-weight:700; color:var(--accent)}
#tree .folder>summary:hover,#tree .folder>div.folder-head:hover{background:var(--bg)}
#tree .folder>summary::-webkit-details-marker{display:none}
#tree .folder .arrow{display:inline-block; width:16px; flex:none; color:var(--muted); transition:transform .15s; font-size:11px}
#tree .folder[open]>.folder-head .arrow, #tree .folder[open]>summary .arrow{transform:rotate(90deg)}
#tree .folder .fname{flex:1; min-width:0; overflow:hidden; text-overflow:ellipsis; white-space:nowrap}
#tree .folder>div.folder-children{border-left:1px solid var(--line); margin-left:10px; padding-left:8px}
#tree mark{background:var(--amber); color:#fff; border-radius:3px; padding:0 2px}
#tree .learning-shell__chapter-list{gap:.0625rem; margin:0; padding:0; list-style:none; display:grid}
#tree .learning-shell__chapter-list .learning-shell__chapter-list{padding-left:0}
#tree .learning-shell__chapter-item[data-expanded=true] > .learning-shell__chapter-list{border-left:1px solid var(--line); margin:.125rem 0 .25rem; padding:.125rem 0 .125rem .375rem}
#tree .learning-shell__chapter-item[data-level="1"] + .learning-shell__chapter-item[data-level="1"]{margin-top:.5rem}
#tree .learning-shell__chapter-row{min-width:0; min-height:2.125rem; color:var(--muted); border-radius:.5rem; align-items:center; gap:.25rem; display:flex; cursor:default}
#tree .learning-shell__chapter-row:hover{background:var(--bg)}
#tree .learning-shell__chapter-row[data-sec]{cursor:pointer}
#tree .learning-shell__chapter-row.is-active{color:var(--accent); background:var(--accent-weak); font-weight:600}
#tree .learning-shell__chapter-item[data-level="1"] > .learning-shell__chapter-row{min-height:2.5rem; color:var(--text); font-weight:700}
#tree .learning-shell__chapter-item[data-level="2"] > .learning-shell__chapter-row{color:var(--text)}
#tree .learning-shell__chapter-item[data-level="3"] > .learning-shell__chapter-row{color:var(--muted)}
#tree .learning-shell__chapter-label{min-width:0; width:100%; color:inherit; font-size:.875rem; font-weight:500; padding:.25rem .375rem .25rem 0; line-height:1.4; text-align:left; background:0 0; border:0; display:flex; align-items:center; gap:.25rem; cursor:pointer; overflow:hidden}
#tree .learning-shell__chapter-label > span{min-width:0; overflow:hidden; text-overflow:ellipsis; white-space:nowrap}
#tree .learning-shell__chapter-label svg{width:.9375rem; height:.9375rem; flex:none; display:block; transition:transform .12s}
#tree .learning-shell__chapter-item[data-expanded=true] > .learning-shell__chapter-row .learning-shell__chapter-label svg{transform:rotate(90deg)}
#tree .learning-shell__chapter-item[data-level="1"] > .learning-shell__chapter-row .learning-shell__chapter-label{font-size:1rem; font-weight:800}
#tree .learning-shell__chapter-item[data-level="2"] > .learning-shell__chapter-row .learning-shell__chapter-label{font-size:.875rem; font-weight:600}

/* ===== 通用组件 ===== */
.card{background:var(--card); border:1px solid var(--line); border-radius:var(--radius); box-shadow:var(--shadow); padding:20px 24px; margin-bottom:12px}
.section-head{display:flex; align-items:center; gap:10px; flex-wrap:wrap; margin-bottom:12px}
.section-head h2{font-size:20px; font-weight:700}
.section-head .crumb{font-size:14px; color:var(--muted)}
.section-head .spacer{flex:1}
.btn{min-height:40px; padding:0 15px; border-radius:var(--radius-control); font-size:14px; border:1px solid var(--line); background:var(--card); color:var(--text); display:inline-flex; align-items:center; justify-content:center; gap:6px; transition:border-color .12s, color .12s, background .12s, opacity .12s}
.btn:hover{border-color:var(--accent); color:var(--accent)}
.btn.primary{background:var(--accent); border-color:var(--accent); color:#fff; font-weight:600}
.btn.primary:hover{background:var(--accent-hover); color:#fff}
.btn.green{background:var(--green); border-color:var(--green); color:#fff}
.btn.green:hover{background:var(--green); opacity:.9; color:#fff}
.btn.small{min-height:34px; padding:0 11px; font-size:13px; border-radius:var(--radius-control)}
.btn:disabled{opacity:.45; cursor:not-allowed}
.pbar{height:6px; background:var(--bg); border-radius:999px; overflow:hidden; flex:1; max-width:160px}
.pbar>i{display:block; height:100%; background:var(--accent); border-radius:4px}
.muted{color:var(--muted)}
.empty{padding:46px 10px; text-align:center; color:var(--muted); font-size:15px; line-height:2}
.toast{position:fixed; bottom:26px; left:50%; transform:translateX(-50%); background:#232b3b; color:#fff; padding:10px 20px; border-radius:10px; font-size:13.5px; z-index:99; opacity:0; transition:opacity .2s, transform .2s; pointer-events:none; box-shadow:var(--shadow-lg); font-weight:500}
.toast.show{opacity:1}
html[data-theme="dark"] .toast{background:#2a3245}
.katex{font-size:1.06em}
.katex-display{margin:10px 0; overflow-x:auto; overflow-y:hidden; padding:4px 0}
.q-img{max-width:100%; border-radius:8px; margin:6px 0; border:1px solid var(--line)}
.markdown table{border-collapse:collapse; margin:10px 0; font-size:14px}
.markdown td,.markdown th{border:1px solid var(--line); padding:6px 10px}
.markdown code{background:var(--bg); padding:1px 6px; border-radius:5px; font-size:.9em}
.qlist-item{border:1px solid var(--line); border-radius:8px; padding:13px 16px; margin-bottom:10px; cursor:pointer; background:var(--card); transition:border-color .12s, box-shadow .12s}
.qlist-item:hover{border-color:var(--accent); box-shadow:var(--shadow)}
.qlist-item .t1{display:flex; gap:8px; align-items:center; flex-wrap:wrap; font-size:13px; color:var(--muted); margin-bottom:4px}
.qlist-item .t1 .serial{color:var(--accent); font-weight:700}
.qlist-item .stem{font-size:15px; color:var(--text)}
.qlist-item .stem .katex{font-size:.92em}
/* ===== 首页 ===== */
.home-stack{display:flex; flex-direction:column; gap:16px}
.dashboard-hero{background:radial-gradient(88% 150% at 0% 0%, var(--accent-weak) 0%, var(--card) 78%); border-color:var(--accent-soft); display:grid; grid-template-columns:minmax(0,1fr) auto; align-items:center; gap:20px; min-height:140px; overflow:hidden}
.dashboard-hero-copy{display:grid; gap:10px; min-width:0}
.dashboard-hero-task{display:grid; gap:6px; min-width:0}
.dashboard-hero-task h1{font-size:30px; font-weight:800; letter-spacing:-.02em; line-height:1.15; margin:0}
.dashboard-hero-empty{color:var(--muted); font-size:15px; margin:0}
.dashboard-hero-cta{display:flex; align-items:center; justify-content:flex-end; gap:8px; flex-wrap:wrap}
.dashboard-start{min-width:140px; min-height:44px; border-radius:12px; box-shadow:0 6px 14px rgba(53,111,229,.18); font-weight:700}
.home-title{font-size:16px; font-weight:700; margin-bottom:12px; display:flex; align-items:center; gap:8px}
.home-title:before{content:none}
.home-hero{background:var(--card); border-color:var(--line)}
.home-hero .hero-crumb{font-size:16.5px; font-weight:800; color:var(--accent); word-break:break-all}
.hero-progress{display:flex; align-items:center; gap:10px; margin:12px 0 4px}
.pbar.wide{flex:1; max-width:none; height:8px; background:var(--line)}
.home-metrics{display:grid; grid-template-columns:minmax(15rem,1.35fr) repeat(2,minmax(10rem,1fr)); border:1px solid var(--line); border-radius:8px; background:var(--card); overflow:hidden; margin-bottom:12px}
.metric-item{min-width:0; min-height:92px; padding:16px 18px; display:grid; align-content:center; gap:4px; border-left:1px solid var(--line)}
.metric-item:first-child{border-left:0; background:var(--accent-weak)}
.metric-heading{font-size:13px; color:var(--muted); font-weight:600}
.metric-body{font-size:30px; font-weight:800; color:var(--text); display:flex; align-items:baseline; gap:4px; font-variant-numeric:tabular-nums}
.metric-body span{font-size:13px; color:var(--muted); font-weight:500}
.metric-sub{font-size:13px; color:var(--muted)}
.home-lower-grid{display:grid; grid-template-columns:minmax(0,1.3fr) minmax(18rem,.7fr); gap:14px; align-items:start}
.dashboard-activity-header{display:flex; align-items:center; justify-content:space-between; gap:12px; min-width:0; margin-bottom:12px}
.dashboard-activity-header h2{font-size:16px; font-weight:700; margin:0}
.dashboard-activity-meta{font-size:13px; color:var(--muted); white-space:nowrap}
.home-notice p{color:var(--muted); font-size:14px; line-height:1.75; margin:0}
.stat-tiles{display:grid; grid-template-columns:repeat(auto-fit,minmax(170px,1fr)); gap:12px}
.stat-tile{text-align:center; border:1px solid var(--line); border-radius:8px; padding:16px 10px; background:var(--card)}
.stat-tile:hover{border-color:var(--accent-soft); box-shadow:var(--shadow)}
.st-label{font-size:13px; color:var(--muted)}
.st-big{font-size:30px; font-weight:800; color:var(--accent); margin:4px 0; font-variant-numeric:tabular-nums}
.st-big small{font-size:13px; color:var(--muted); font-weight:400}
.arr.up{color:var(--red); font-weight:700}
.arr.down{color:var(--green); font-weight:700}
.arr.flat{color:var(--muted)}
.home-heat .heat-wrap{overflow-x:auto; padding-bottom:4px}

/* ===== 学习活动（按月热力图） ===== */
.heat-months{display:flex; flex-wrap:wrap; gap:28px}
.heat-month{flex:1; min-width:228px}
.heat-mhead{display:flex; align-items:baseline; justify-content:space-between; gap:8px; margin-bottom:8px}
.heat-mlabel{font-weight:700; font-size:13px}
.heat-mtotal{font-size:11.5px; color:var(--muted)}
.heat-grid{display:grid; grid-template-columns:repeat(7,14px); gap:4px; align-items:center; justify-content:start}
.hm-wd{font-size:10.5px; color:var(--muted); text-align:center}
.hm-cell{width:14px; height:14px; border-radius:3.5px; border:1px solid rgba(0,0,0,.05); cursor:default}
.hm-cell.l0{background:var(--heat-0)}
.hm-cell.l1{background:var(--heat-1)}
.hm-cell.l2{background:var(--heat-2)}
.hm-cell.l3{background:var(--heat-3)}
.hm-cell.l4{background:var(--heat-4)}
.hm-cell.off{opacity:.55}
.hm-empty{background:transparent; border:none}
.heat-legend{display:flex; align-items:center; gap:4px; margin-top:14px}
.heat-legend .hm-cell{width:12px; height:12px}

/* ===== 掌握地图 ===== */
.filter-chips{display:flex; gap:6px; flex-wrap:wrap}
.filter-chips .chip{padding:5px 13px; border-radius:999px; border:1px solid var(--line); font-size:12.5px; background:var(--card); color:var(--muted)}
.filter-chips .chip.active{background:var(--accent); border-color:var(--accent); color:#fff; font-weight:600}
.filter-chips .chip:hover{border-color:var(--accent); color:var(--accent)}
.filter-chips .chip.active:hover{color:#fff}
.mastery-legend{display:flex; gap:14px; flex-wrap:wrap; margin:2px 0 12px; font-size:12px; color:var(--muted)}
.mastery-legend .lg{display:flex; align-items:center; gap:5px}
.mastery-legend i{width:12px; height:12px; border-radius:3px; display:inline-block; border:1px solid rgba(0,0,0,.06)}
.mastery-grid{display:flex; flex-wrap:wrap; gap:2px}
.mcell{width:9px; height:9px; border-radius:2px; cursor:pointer; border:1px solid rgba(0,0,0,.05)}
.mcell:hover{outline:1px solid var(--accent); transform:scale(1.25)}
.mcell.m-none{background:var(--m-none)}
.mcell.m-correct{background:var(--m-correct)}
.mcell.m-wrong{background:var(--m-wrong)}
.mcell.m-low{background:var(--m-low, var(--m-wrong))}
.mcell.m-no{background:var(--m-no)}
.mcell.m-mastered{background:var(--m-mastered)}
/* ===== 错题复测 ===== */
.retest-list{margin-top:12px}
.retest-item{display:flex; gap:10px; align-items:center; padding:12px 14px; border:1px solid var(--line); border-radius:8px; margin-bottom:8px; background:var(--card); transition:border-color .12s}
.retest-item:hover{border-color:var(--accent)}
.retest-item .ri-main{flex:1; cursor:pointer; min-width:0}
.retest-item .ri-head{display:flex; gap:8px; align-items:center; flex-wrap:wrap; font-size:12px; margin-bottom:4px}
.retest-item .ri-head .serial{color:var(--accent); font-weight:700}
.retest-item .stem{font-size:13.5px; color:var(--text); overflow:hidden; text-overflow:ellipsis; white-space:nowrap}
.retest-item .ri-side{display:flex; flex-direction:column; align-items:flex-end; gap:6px; flex:none}
.retest-help .home-title{margin-bottom:6px}
.mchip{font-size:11px; padding:1px 8px; border-radius:999px; border:1px solid var(--line); color:var(--muted); white-space:nowrap}
.mchip.m-no{background:var(--red-weak); border-color:var(--red); color:var(--red)}
.mchip.m-low{background:var(--amber-weak); border-color:var(--amber); color:var(--amber)}
.mchip.m-mastered{background:var(--green-weak); border-color:var(--green); color:var(--green)}

/* ===== 题目视图 ===== */
.practice-top{display:flex; align-items:center; gap:10px; flex-wrap:wrap; padding:12px 16px}
.practice-top .crumb{font-weight:700; color:var(--accent); font-size:13.5px}
.mini-check{font-size:12px; color:var(--muted); display:flex; align-items:center; gap:5px; cursor:pointer}
.mini-check input{accent-color:var(--accent)}
.retest-hint{background:var(--amber-weak); color:var(--amber); font-size:12px; padding:3px 11px; border-radius:999px; white-space:nowrap; font-weight:600}
.stack-notes{background:var(--accent-weak); border:1px solid var(--accent-soft); color:var(--accent); border-radius:8px; padding:10px 16px; font-size:13px; margin-bottom:14px}
.q-card{position:relative; border-radius:var(--radius-question)}
.q-idx{position:absolute; top:-1px; right:16px; transform:translateY(-50%); background:var(--accent); color:#fff; font-size:11.5px; font-weight:700; padding:3px 12px; border-radius:999px; letter-spacing:.3px}
.q-tools{display:flex; gap:8px; flex-wrap:wrap; margin-bottom:14px; padding-bottom:12px; border-bottom:1px dashed var(--line)}
.q-tools .qtool{position:relative; padding:6px 13px; border-radius:18px; border:1px solid var(--line); font-size:12.5px; background:var(--card); color:var(--muted); transition:all .12s}
.q-tools .qtool:hover{border-color:var(--accent); color:var(--accent)}
.q-tools .qtool.on{background:var(--accent-weak); border-color:var(--accent); color:var(--accent); font-weight:600}
.note-dot{position:absolute; top:-2px; right:-2px; width:9px; height:9px; border-radius:50%; background:var(--amber); border:2px solid var(--card)}
.q-head{display:flex; align-items:center; gap:8px; flex-wrap:wrap; margin-bottom:10px}
.q-head .serial{font-weight:800; color:var(--accent)}
.q-head .meta{font-size:13px; color:var(--muted); background:var(--bg); padding:2px 9px; border-radius:999px}
.q-head .tag{font-size:13px; padding:2px 9px; border-radius:999px; font-weight:600}
.q-id-text{font-size:12px}
.q-head-actions{display:flex; align-items:center; gap:8px; flex-wrap:wrap; position:relative}
.mastery-state{font-size:13px; color:var(--muted); background:var(--bg); border:1px solid var(--line); border-radius:999px; padding:3px 10px; white-space:nowrap}
.mastery-state.m-no{color:var(--red); background:var(--red-weak); border-color:var(--red)}
.mastery-state.m-low{color:var(--amber); background:var(--amber-weak); border-color:var(--amber)}
.mastery-state.m-mastered{color:var(--green); background:var(--green-weak); border-color:var(--green)}
.tag.mc{background:var(--accent-weak); color:var(--accent)}
.tag.fill{background:var(--amber-weak); color:var(--amber)}
.q-stem{font-size:17px}
.q-stem .math-inline{margin:0 2px}
.opt-list{display:flex; flex-direction:column; gap:8px; margin-top:14px}
.opt{border:1px solid var(--line); border-radius:8px; padding:11px 14px; cursor:pointer; background:var(--card); text-align:left; font-size:15px; display:flex; gap:10px; align-items:flex-start; transition:border-color .12s, background .12s, box-shadow .12s}
.opt:hover{border-color:var(--accent); box-shadow:var(--shadow)}
.opt .opt-label{font-weight:800; color:var(--accent); min-width:20px}
.opt.sel{border-color:var(--accent); background:var(--accent-weak)}
.opt.correct{border-color:var(--green); background:var(--green-weak)}
.opt.correct .opt-label{color:var(--green)}
.opt.wrong{border-color:var(--red); background:var(--red-weak)}
.opt.wrong .opt-label{color:var(--red)}
.opt.locked{cursor:default}
.opt.locked:hover{box-shadow:none}
.opt-hint{font-size:14px; color:var(--muted); margin-top:10px}
.fill-hint{background:var(--bg); border:1px dashed var(--line2); border-radius:8px; padding:14px 16px; color:var(--muted); font-size:14px; margin-top:14px; text-align:center}
.result-banner{border-radius:8px; padding:11px 15px; font-weight:700; font-size:15px; margin-top:12px; display:flex; align-items:center; gap:8px}
.result-banner.correct{background:var(--green-weak); color:var(--green)}
.result-banner.wrong{background:var(--red-weak); color:var(--red)}
.answer-block,.explain-block{margin-top:14px; padding:15px 17px; border-radius:8px; background:var(--bg); border:1px solid var(--line); font-size:14.5px}
.answer-block .blk-title{font-weight:800; color:var(--green); margin-bottom:6px}
.explain-block .blk-title{font-weight:800; color:var(--purple); margin-bottom:6px}
.note-block{margin-top:14px}
.note-block textarea{width:100%; min-height:66px; padding:10px 13px; border:1px solid var(--line); border-radius:var(--radius-control); background:var(--bg); color:var(--text); font-size:15px; resize:vertical; outline:none; transition:border-color .12s}
.note-block textarea:focus{border-color:var(--accent); background:var(--card)}
.actions{display:flex; gap:8px; flex-wrap:wrap; margin-top:16px; align-items:center}
.pill{min-height:36px; padding:0 13px; border-radius:999px; border:1px solid var(--line); font-size:13.5px; background:var(--card); color:var(--muted); display:inline-flex; align-items:center; justify-content:center; gap:5px; transition:all .12s}
.pill:hover{border-color:var(--accent); color:var(--accent)}
.pill.on-fav{background:var(--accent-weak); border-color:var(--accent); color:var(--accent); font-weight:600}
html[data-theme="dark"] .pill.on-fav{background:var(--accent-weak); border-color:var(--accent); color:var(--accent)}
.pill.m-no{background:var(--red-weak); border-color:var(--red); color:var(--red)}
.pill.m-low{background:var(--amber-weak); border-color:var(--amber); color:var(--amber)}
.pill.m-mastered{background:var(--green-weak); border-color:var(--green); color:var(--green)}
.pill.m-no.on{box-shadow:0 0 0 2px var(--red) inset; font-weight:700}
.pill.m-low.on{box-shadow:0 0 0 2px var(--amber) inset; font-weight:700}
.pill.m-mastered.on{box-shadow:0 0 0 2px var(--green) inset; font-weight:700}
.pill.clear{font-size:12px; color:var(--muted)}
.pill.clear:hover{color:var(--red); border-color:var(--red)}
.q-fab .qtool{min-height:36px; padding:0 13px; border-radius:999px; border:1px solid var(--line); font-size:13.5px; background:var(--card); color:var(--muted); display:inline-flex; align-items:center; justify-content:center; gap:5px; transition:all .12s; position:relative}
.q-fab .qtool:hover{border-color:var(--accent); color:var(--accent)}
.q-fab .qtool.on{background:var(--accent-weak); border-color:var(--accent); color:var(--accent); font-weight:600}
.q-actions{display:flex; gap:8px; flex-wrap:wrap; align-items:center; margin-top:16px; padding-top:14px; border-top:1px solid var(--line)}
.nav-row{display:flex; justify-content:space-between; gap:8px; margin-top:16px}
.nav-row .mid{display:flex; gap:8px}
.stack-end{display:flex; justify-content:center; gap:10px; padding:10px 0 20px}
.note-snippet{font-size:13px; color:var(--text); background:var(--amber-weak); border-left:3px solid var(--amber); border-radius:6px; padding:6px 10px; margin-top:4px; white-space:pre-wrap}
.self-judge{background:var(--amber-weak); border:1px solid var(--amber); border-radius:8px; padding:10px 14px; margin-top:6px}
/* ===== 错题复测（新版） ===== */
.retest-bar{display:flex; align-items:center; gap:10px; flex-wrap:wrap; margin-bottom:12px}
.retest-bar select,.filter-bar select{min-height:38px; padding:0 10px; border-radius:var(--radius-control); border:1px solid var(--line); background:var(--card); color:var(--text); font-size:14px; outline:none; transition:border-color .12s}
.retest-bar select:focus,.filter-bar select:focus{border-color:var(--accent)}
.retest-tabs{display:flex; gap:6px; flex-wrap:wrap; margin-left:auto}
.rt-tab{min-height:34px; padding:0 13px; border-radius:999px; border:1px solid var(--line); background:var(--card); font-size:13.5px; color:var(--muted); transition:all .12s; display:inline-flex; align-items:center; gap:5px}
.rt-tab:hover{border-color:var(--accent); color:var(--accent)}
.rt-tab.active{background:var(--accent); border-color:var(--accent); color:#fff; font-weight:600}
.rt-tab b{font-variant-numeric:tabular-nums}
.rt-tab.rt-all{color:var(--accent); border-color:var(--accent-soft); background:var(--accent-weak); font-weight:600}
.rt-tab.rt-all:hover{background:var(--accent); border-color:var(--accent); color:#fff}
.filter-bar{display:flex; gap:8px; flex-wrap:wrap; margin-bottom:12px}
.rt-rules{background:var(--bg); border-color:var(--line)}
.rt-rules .home-title{margin-bottom:8px}
.rt-rule-text{font-size:14px; color:var(--muted); line-height:2.1}
.rt-empty{text-align:center; color:var(--muted); font-size:14px; padding:34px 16px; line-height:2}

/* 复测题头 / 操作 / 历史 */
.rt-head{display:flex; align-items:center; gap:10px; flex-wrap:wrap; padding:11px 14px; margin:-20px -24px 16px; background:var(--bg); border-bottom:1px solid var(--line); border-radius:var(--radius-question) var(--radius-question) 0 0}
.rt-head .serial{font-weight:800; color:var(--accent)}
.rt-count{font-size:12px; color:var(--muted); background:var(--card); border:1px solid var(--line); padding:2px 10px; border-radius:999px; white-space:nowrap; font-variant-numeric:tabular-nums}
.rt-status{font-size:12px; font-weight:700; padding:2px 10px; border-radius:999px; white-space:nowrap}
.rt-status.today{background:var(--amber-weak); color:var(--amber)}
.rt-status.overdue{background:var(--red-weak); color:var(--red)}
.rt-status.future{background:var(--green-weak); color:var(--green)}
.rt-path{font-size:12px; color:var(--muted); text-align:right; word-break:break-all; min-width:0; flex:1}
.rt-actions{display:flex; gap:8px; flex-wrap:wrap; margin-top:14px; padding-top:12px; border-top:1px solid var(--line)}
.rt-actions .btn.danger{border-color:var(--red); color:var(--red)}
.rt-actions .btn.danger:hover{background:var(--red); border-color:var(--red); color:#fff}
.rt-history{margin-top:12px; background:var(--bg); border:1px solid var(--line); border-radius:8px; padding:12px 14px; font-size:13px}
.rt-hist-list{display:flex; flex-direction:column}
.rt-hist-item{display:flex; gap:10px; align-items:center; font-size:13px; padding:6px 2px; border-bottom:1px dashed var(--line)}
.rt-hist-item:last-child{border-bottom:none}
.rt-hist-date{color:var(--muted); font-variant-numeric:tabular-nums; white-space:nowrap}
.rt-hist-act{flex:1; color:var(--text); min-width:0}
.rt-hist-due{color:var(--muted); font-size:12px; white-space:nowrap}

/* ===== 题目操作栏（参考原站） ===== */
.q-toolbar{border-top:1px solid var(--line); margin-top:16px; padding-top:10px; display:grid; gap:8px}
.reading-actions{display:grid; grid-template-columns:repeat(3,minmax(0,1fr)); gap:8px}
.q-tool-btn{height:42px; min-height:42px; border-radius:999px; font-size:14px; font-weight:500; color:var(--muted); background:var(--card); border:1px solid var(--line); display:inline-flex; align-items:center; justify-content:center; gap:6px; line-height:1; transition:border-color .12s, color .12s, background .12s}
.q-tool-btn:hover{border-color:var(--accent); color:var(--accent); background:var(--accent-weak)}
.reading-actions .q-tool-btn.answer{color:var(--accent); background:var(--accent-weak); border-color:var(--accent-soft); font-weight:600}
.reading-actions .q-tool-btn.answer:hover{border-color:var(--accent); color:var(--accent-hover)}
.reading-actions .q-tool-btn.on{box-shadow:0 0 0 1px var(--accent) inset}
.q-ico{width:18px; height:18px; flex:none; display:block}
.mastery-actions{display:grid; grid-template-columns:repeat(4,minmax(0,1fr)); gap:8px; align-items:center}
.mastery-btn{height:42px; min-height:42px; padding:0 8px; border:1px solid transparent; border-radius:999px; font-size:14px; font-weight:500; color:var(--muted); background:transparent; display:inline-flex; align-items:center; justify-content:center; gap:6px; line-height:1; transition:border-color .12s, color .12s, background .12s}
.mastery-btn:hover{color:var(--text); background:var(--bg); border-color:var(--line)}
.mastery-btn.favorite.on-fav{color:var(--accent); background:var(--accent-weak); border-color:var(--accent); font-weight:600}
.mastery-btn.m-low.on{color:var(--amber); background:var(--amber-weak); border-color:var(--amber)}
.mastery-btn.m-no.on{color:var(--red); background:var(--red-weak); border-color:var(--red)}
.mastery-btn.m-mastered.on{color:var(--green); background:var(--green-weak); border-color:var(--green)}
.mastery-btn.on{font-weight:600}
.q-tool-btn.note{position:relative}
.q-fab{display:flex; gap:8px; flex-wrap:wrap; align-items:center; margin-top:14px}
.q-stats{margin-top:12px; font-size:13px; padding-top:12px; border-top:1px dashed var(--line)}
.q-card{position:relative; transition:border-color .15s}

/* ===== 学情仪表盘 ===== */
.ana-dash-kpi{display:grid; grid-template-columns:repeat(4,minmax(0,1fr)); gap:10px; margin-bottom:14px}
.ana-dash-kpi .kpi-item{min-width:0; border:1px solid var(--line); border-radius:var(--radius); background:var(--card); padding:13px 15px}
.kpi-label{font-size:11px; color:var(--muted); font-weight:600; display:flex; justify-content:space-between; gap:8px}
.kpi-value{font-size:28px; font-weight:800; margin-top:5px; font-variant-numeric:tabular-nums; letter-spacing:-.02em}
.kpi-value small{font-size:12px; color:var(--muted); font-weight:500; margin-left:4px}
.kpi-delta{font-size:11px; color:var(--green); margin-top:2px}
.kpi-delta.hot{color:var(--red)}
.ana-dash-grid{display:grid; grid-template-columns:minmax(0,1.45fr) minmax(260px,.75fr); gap:14px; margin-bottom:14px}
.ana-panel-title{font-size:12px; color:var(--muted); font-weight:700; display:flex; justify-content:space-between; align-items:center; margin-bottom:12px}
.ana-panel-title b{color:var(--text)}
.ana-weak-list{display:grid; gap:10px}
.ana-weak-row{border:1px solid var(--line); border-radius:var(--radius); background:var(--bg); padding:10px 12px}
.ana-weak-top{display:flex; justify-content:space-between; gap:10px; font-size:13px; font-weight:700; margin-bottom:8px}
.ana-weak-top b{color:var(--muted); font-size:12px; font-variant-numeric:tabular-nums}
.ana-weak-bar{height:9px; border-radius:999px; background:var(--line); overflow:hidden}
.ana-weak-bar i{display:block; height:100%; border-radius:999px}
.ana-weak-bar i.red{background:var(--red)}
.ana-weak-bar i.amber{background:var(--amber)}
.ana-weak-bar i.blue{background:var(--accent)}
.ana-weak-bar i.green{background:var(--green)}
.ana-weak-meta{display:flex; justify-content:space-between; gap:10px; color:var(--muted); font-size:11.5px; margin-top:7px}
.ana-donut-flex{display:grid; grid-template-columns:auto minmax(0,1fr); gap:14px; align-items:center}
.ana-legend{display:grid; gap:9px; font-size:13px}
.ana-legend div{display:flex; align-items:center; gap:8px}
.ana-legend i{width:10px; height:10px; border-radius:3px; display:inline-block}
.ana-legend .d-no{background:var(--red)}
.ana-legend .d-low{background:var(--amber)}
.ana-legend .d-mas{background:var(--green)}
.ana-legend b{margin-left:auto; font-variant-numeric:tabular-nums}
.ana-actions{display:flex; gap:8px; flex-wrap:wrap; margin-bottom:14px}
.ana-empty{padding:46px 10px; text-align:center; color:var(--muted); font-size:13px}
.ai-analysis-panel{border:1px solid var(--accent-soft); border-radius:var(--radius); background:var(--accent-weak); padding:14px 16px; margin-bottom:14px}
.ai-analysis-head{display:flex; align-items:center; justify-content:space-between; gap:10px; font-size:13px; font-weight:700; color:var(--accent); margin-bottom:10px}
.ai-analysis-body{font-size:14px; color:var(--text); line-height:1.8}
.ai-analysis-body .markdown p{margin:6px 0}
.ai-analysis-error{color:var(--red)}
@media (max-width:900px){
  .ana-dash-kpi{grid-template-columns:repeat(2,minmax(0,1fr))}
  .ana-dash-grid{grid-template-columns:1fr}
  .ana-donut-flex{grid-template-columns:1fr}
}

/* ===== A 水波聚焦动画 ===== */
.btn,.icon-btn,.nav-mod,.scope-option,.learning-shell__chapter-row,.qlist-item,.opt,.pill,.rt-tab,.q-tool-btn,.mastery-btn,.chip,.q-fab .qtool,.danger-btn{
  position:relative;
  overflow:hidden;
}
.ripple-ink{
  position:absolute;
  border-radius:50%;
  pointer-events:none;
  background:rgba(53,111,229,.22);
  transform:scale(0);
  animation:rippleA .36s ease-out forwards;
  z-index:2;
}
@keyframes rippleA{
  to{transform:scale(2.6); opacity:0}
}
.nav-mod.active::before,
.learning-shell__chapter-row.is-active::before{
  content:'';
  position:absolute;
  left:0;
  top:20%;
  bottom:20%;
  width:3px;
  border-radius:999px;
  background:var(--accent);
  animation:rippleBarA .24s ease-out;
  pointer-events:none;
}
@keyframes rippleBarA{
  from{transform:scaleY(.2); opacity:0}
  to{transform:scaleY(1); opacity:1}
}
#content.view-swap{
  animation:viewA .28s ease;
}
@keyframes viewA{
  from{opacity:0; transform:translateY(7px)}
  to{opacity:1; transform:none}
}
@media (prefers-reduced-motion: reduce){
  .ripple-ink,#content.view-swap,.nav-mod.active::before,.learning-shell__chapter-row.is-active::before{
    animation:none !important;
  }
}
.q-card:hover{border-color:var(--accent-soft)}
@media (max-width:480px){
  .mastery-actions{gap:6px}
  .mastery-btn{height:44px; min-height:44px; padding:0 5px; font-size:12px; gap:4px}
  .reading-actions{gap:6px}
  .q-tool-btn{height:44px; min-height:44px; font-size:12px; gap:4px}
  .q-ico{width:16px; height:16px}
}

/* ===== 细节打磨 ===== */
.section-head h2{display:flex; align-items:center; gap:8px}
.section-head h2:before{content:none}
.answer-block,.explain-block{border-left:3px solid var(--green); border-radius:11px}
.explain-block{border-left-color:var(--purple)}
.answer-block .blk-title,.explain-block .blk-title{display:flex; align-items:center; gap:6px}
.pill{font-weight:500}
.pill.on-fav{font-weight:700}
.q-tools .qtool,.qg-btns .qtool{position:relative}
.note-dot{top:-3px; right:-3px}
.practice-top{border-radius:var(--radius); box-shadow:var(--shadow)}
.practice-top .btn.small{height:32px; min-height:32px; padding:0 12px; font-size:12.5px}

/* ===== 学情分析 ===== */
.ana-bar{display:flex; gap:6px; margin-bottom:12px}
.ana-tabs{display:flex; gap:6px}
.chart-range{display:flex; gap:6px; margin-bottom:10px; flex-wrap:wrap}
.chart-range .rt-tab{padding:4px 12px}
.chart-card{border-radius:8px}
.chart-card .home-title{margin-bottom:8px}
.svg-chart{width:100%; height:auto; display:block; margin-top:4px}
.tb-grid{stroke:var(--line); stroke-width:1}
.tb-y{font-size:10px; fill:var(--muted)}
.tb-x{font-size:10px; fill:var(--muted)}
.tb-bar{fill:var(--accent); opacity:.82; transition:opacity .12s}
.tb-bar:hover{opacity:1}
.tb-bar.rt{fill:var(--green); opacity:.82}
.tb-line{stroke:var(--amber); stroke-width:2.5; stroke-linejoin:round; stroke-linecap:round}
.chart-legend{display:flex; gap:16px; margin-top:10px; font-size:12px; color:var(--muted); flex-wrap:wrap}
.chart-legend .lg{display:flex; align-items:center; gap:5px}
.chart-legend i.sw{width:16px; height:5px; border-radius:3px; display:inline-block; flex:none}
.chart-legend i.sw.bar{background:var(--accent)}
.chart-legend i.sw.line{background:var(--amber); height:3px}
.chart-legend i.sw.rt{background:var(--green)}
.gt-badge{display:inline-flex; align-items:center; justify-content:center; padding:2px 9px; border-radius:var(--radius-control); font-size:11px; font-weight:700; line-height:1.4; flex:none}
.weak-card{border-left:3px solid var(--line); border-radius:8px}
.weak-card.w-danger{border-left-color:var(--red)}
.weak-card.w-warn{border-left-color:var(--amber)}
.weak-card.w-ok{border-left-color:var(--accent)}
.weak-card.w-good{border-left-color:var(--green)}
.weak-card.w-todo{border-left-color:var(--line2)}
.weak-card.w-na{border-left-color:var(--line2)}
.w-head{display:flex; align-items:center; gap:8px; flex-wrap:wrap}
.w-name{font-weight:700; font-size:16px}
.w-chip{font-size:13px; font-weight:700; padding:2px 10px; border-radius:999px; white-space:nowrap}
.w-chip.danger{background:var(--red-weak); color:var(--red)}
.w-chip.warn{background:var(--amber-weak); color:var(--amber)}
.w-chip.ok{background:var(--accent-weak); color:var(--accent)}
.w-chip.good{background:var(--green-weak); color:var(--green)}
.w-chip.todo{background:var(--bg); color:var(--muted); border:1px solid var(--line)}
.w-chip.na{background:var(--bg); color:var(--muted); border:1px dashed var(--line2)}
.w-prog{display:flex; align-items:center; gap:10px; margin:10px 0 6px}
.w-prog .pbar.wide{flex:1; max-width:none}
.w-metrics{display:flex; gap:16px; flex-wrap:wrap; align-items:center; font-size:13px}
.wm{display:flex; gap:6px; align-items:center}
.wm-k{color:var(--muted); font-size:13px}
.wm-v{font-weight:700; font-variant-numeric:tabular-nums}
.wm-v.hot{color:var(--red)}
.wm-mastery{flex:1; min-width:240px; flex-wrap:wrap}
.w-mbar{display:flex; height:8px; border-radius:999px; overflow:hidden; width:120px; background:var(--bg); flex:none}
.w-mbar .seg.no{background:var(--red)}
.w-mbar .seg.low{background:var(--amber)}
.w-mbar .seg.mastered{background:var(--green)}
.w-mlegend{font-size:11.5px; color:var(--muted); white-space:nowrap}
.w-mlegend b{color:var(--text)}
.w-mlegend b.d-no{color:var(--red)}
.w-mlegend b.d-low{color:var(--amber)}
.w-mlegend b.d-mas{color:var(--green)}
.w-actions{display:flex; gap:8px; margin-top:10px; flex-wrap:wrap}
.weak-card.sec .w-name{font-size:14px}
.grp-head,.grp-row{display:flex; align-items:center; gap:10px; font-size:13px}
.grp-head{color:var(--muted); font-size:12px; margin-bottom:6px}
.grp-head .grp-bar{background:transparent}
.grp-row{padding:7px 0; border-top:1px solid var(--line)}
.grp-name{width:150px; display:flex; gap:7px; align-items:center; font-weight:600; min-width:0; flex:none}
.grp-bar{flex:1; height:8px; background:var(--bg); border-radius:999px; overflow:hidden}
.grp-bar i{display:block; height:100%; background:var(--accent); border-radius:999px}
.grp-num{width:78px; text-align:right; font-variant-numeric:tabular-nums; color:var(--muted); flex:none}
.grp-num b{color:var(--text)}
.zt-area{--gc:#e8590c; border-left:3px solid var(--amber)}
.zt-head{display:flex; align-items:center; gap:8px; font-weight:700; margin-bottom:8px; flex-wrap:wrap}
.zt-head .spacer{flex:1}
.zt-row{display:flex; align-items:center; gap:10px; font-size:13px; padding:6px 0; border-top:1px dashed var(--line)}
.zt-year{width:86px; flex:none}
.zt-prog{flex:1; height:7px; background:var(--bg); border-radius:999px; overflow:hidden}
.zt-prog i{display:block; height:100%; background:var(--amber); border-radius:999px}
.zt-n{width:64px; text-align:right; color:var(--muted); font-variant-numeric:tabular-nums; flex:none}
.zt-r{width:48px; text-align:right; font-variant-numeric:tabular-nums; flex:none}
.zt-r.okc{color:var(--green); font-weight:700}
.zt-r.badc{color:var(--red); font-weight:700}

/* ===== 响应式 ===== */
@media (max-width:600px){
  .card{padding:16px}
  .btn:not(.small), .rt-tab, .pill, .q-fab .qtool, select{min-height:44px}
  .rt-head{margin:-16px -16px 14px; border-radius:10px 10px 0 0}
  .reading-actions{grid-template-columns:repeat(2,minmax(0,1fr))}
  .reading-actions .q-tool-btn.note{grid-column:1/-1}
  .mastery-actions{grid-template-columns:repeat(2,minmax(0,1fr))}
}

/* ===== 登录/注册界面 ===== */
.auth-overlay{position:fixed; inset:0; z-index:9999; display:flex; align-items:center; justify-content:center; background:var(--bg); overflow:auto; padding:20px}
.auth-card{width:100%; max-width:380px; background:var(--card); border:1px solid var(--line); border-radius:14px; padding:28px 26px; box-shadow:0 10px 40px rgba(0,0,0,.08)}
.auth-brand{font-size:20px; font-weight:800; text-align:center; color:var(--fg)}
.auth-sub{text-align:center; color:var(--muted); font-size:13px; margin:6px 0 22px}
.auth-field{display:block; margin-bottom:14px}
.auth-field span{display:block; font-size:13px; color:var(--muted); margin-bottom:6px}
.auth-field span small{color:var(--muted); opacity:.8; margin-left:6px}
.auth-field input{width:100%; box-sizing:border-box; padding:10px 12px; border:1px solid var(--line); border-radius:8px; background:var(--input-bg, var(--bg)); color:var(--fg); font-size:14px}
.auth-field input:focus{outline:none; border-color:var(--primary, #1a73e8)}
.auth-links{display:flex; justify-content:space-between; margin-top:14px; font-size:13px}
.auth-links a{color:var(--primary, #1a73e8); cursor:pointer; text-decoration:none}
.auth-links a:hover{text-decoration:underline}
.auth-msg{margin-top:14px; font-size:13px; text-align:center; min-height:0}
.auth-msg.err{color:var(--red, #d93025)}
.auth-msg.ok{color:var(--green, #188038)}
.btn.block{width:100%; box-sizing:border-box}
.user-badge{font-weight:600; color:var(--primary, #1a73e8)}

/* 确保 hidden 属性优先于 .auth-overlay 的 display:flex */
.auth-overlay[hidden]{display:none !important}
.auth-card[hidden]{display:none !important}
.auth-field[hidden]{display:none !important}

/* 账号 tab */
.account-status{font-size:13px; color:var(--muted); background:var(--bg); border:1px solid var(--line); border-radius:8px; padding:10px 12px; margin-bottom:12px}