/* ===== Tokens ===== */
:root{
  --serif:"Songti SC","STSong","Noto Serif SC","Noto Serif CJK SC","Source Han Serif SC","SimSun",serif;
  --sans:"PingFang SC","HarmonyOS Sans SC","MiSans","Microsoft YaHei","Noto Sans SC","Noto Sans CJK SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  --mono:ui-monospace,"SF Mono","Cascadia Mono",Consolas,monospace;
  --bg:#f4f0e6; --paper:#fbf9f3; --paper-2:#efeadd; --line:#ddd5c3; --line-2:#cbc1aa;
  --ink:#1f1d19; --ink-2:#5a5448; --ink-3:#8a8371;
  --red:#b8342a; --red-soft:#f3dcd5; --green:#2f6b4f; --green-soft:#dcebe0; --amber:#a86a12; --amber-soft:#f4e5c8; --blue:#2b5885;
  --r:10px; --r-lg:16px;
  --shadow:0 1px 0 rgba(60,45,20,.04),0 6px 20px -12px rgba(60,45,20,.25);
  --t1:clamp(.78rem,.76rem + .1vw,.84rem); --t2:clamp(.9rem,.88rem + .1vw,.96rem); --t3:clamp(1.05rem,1rem + .25vw,1.2rem);
  --t4:clamp(1.35rem,1.2rem + .7vw,1.8rem);
  color-scheme:light;
}
[data-theme="dark"]{
  --bg:#17160f; --paper:#1f1d16; --paper-2:#2a271e; --line:#38342a; --line-2:#4a4537;
  --ink:#ece6d6; --ink-2:#b5ad99; --ink-3:#857e6c;
  --red:#e0675b; --red-soft:#3d2320; --green:#7cc29c; --green-soft:#1f3329; --amber:#e0a94f; --amber-soft:#3a2f1b; --blue:#8ab4e0;
  --shadow:0 6px 24px -14px rgba(0,0,0,.7);
  color-scheme:dark;
}
*{box-sizing:border-box}
html,body{margin:0;height:100%}
body{background:var(--bg);color:var(--ink);font-family:var(--sans);font-size:var(--t2);line-height:1.6;-webkit-font-smoothing:antialiased;-webkit-tap-highlight-color:transparent}
button,input,select,textarea{font:inherit;color:inherit}
button{cursor:pointer}
:focus-visible{outline:2px solid var(--red);outline-offset:2px}
h1,h2,h3{font-family:var(--serif);font-weight:700;margin:0;letter-spacing:.01em;line-height:1.3}
p{margin:0}
.num{font-variant-numeric:tabular-nums}
[hidden]{display:none!important}

/* ===== Shell ===== */
.app{display:grid;grid-template-columns:232px minmax(0,1fr);min-height:100dvh}
.sidebar{position:sticky;top:0;height:100dvh;border-right:1px solid var(--line);background:var(--paper);display:flex;flex-direction:column;padding:22px 14px}
.brand{display:flex;gap:12px;align-items:center;padding:0 8px 22px}
.brand-mark{width:40px;height:40px;border-radius:10px;background:var(--red);color:#fff;display:grid;place-items:center;font-family:var(--serif);font-size:22px;font-weight:700}
.brand-name{font-family:var(--serif);font-weight:700;font-size:1.06rem}
.brand-sub{font-size:var(--t1);color:var(--ink-3)}
.nav{display:flex;flex-direction:column;gap:2px}
.nav button{display:flex;align-items:center;gap:12px;padding:10px 12px;border:0;background:none;border-radius:8px;color:var(--ink-2);text-align:left;position:relative}
.nav button svg{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linejoin:round;stroke-linecap:round;flex:none}
.nav button:hover{background:var(--paper-2);color:var(--ink)}
.nav button.active{background:var(--ink);color:var(--paper)}
.badge{font-style:normal;margin-left:auto;background:var(--red);color:#fff;font-size:11px;min-width:20px;height:20px;border-radius:10px;display:grid;place-items:center;padding:0 6px;font-variant-numeric:tabular-nums}
.side-foot{margin-top:auto;font-size:var(--t1);color:var(--ink-3);padding:8px 12px;display:flex;align-items:center;gap:8px}
.side-foot::before{content:"";width:8px;height:8px;border-radius:50%;background:var(--green)}
.side-foot.off::before{background:var(--amber)}

.main{padding:32px clamp(16px,4vw,48px) 80px;max-width:1240px;width:100%;min-width:0;outline:none}
.view{display:none;animation:fade .25s ease}
.view.active{display:block}
@keyframes fade{from{opacity:0;transform:translateY(4px)}to{opacity:1;transform:none}}
@media (prefers-reduced-motion:reduce){.view{animation:none}*{transition:none!important}}

.page-head{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;flex-wrap:wrap;margin-bottom:22px}
.page-head h1{font-size:var(--t4)}
.page-head .sub{color:var(--ink-3);font-size:var(--t1);margin-top:4px}

/* ===== Cards ===== */
.card{background:var(--paper);border:1px solid var(--line);border-radius:var(--r-lg);padding:20px;box-shadow:var(--shadow)}
.card h2{font-size:var(--t3)}
.card-head{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-bottom:14px}
.muted{color:var(--ink-3)}
.small{font-size:var(--t1)}
.grid{display:grid;gap:18px}
.g-home{grid-template-columns:1.35fr 1fr}
.g-2{grid-template-columns:1fr 1fr}
.stack{display:flex;flex-direction:column;gap:18px}

/* ===== Buttons / forms ===== */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;border:1px solid var(--line-2);background:var(--paper);padding:8px 14px;border-radius:8px;font-size:var(--t2);white-space:nowrap;transition:background .15s,border-color .15s}
.btn:hover{background:var(--paper-2)}
.btn.primary{background:var(--red);border-color:var(--red);color:#fff}
.btn.primary:hover{filter:brightness(1.07)}
.btn.dark{background:var(--ink);border-color:var(--ink);color:var(--paper)}
.btn.ghost{border-color:transparent;background:none}
.btn.sm{padding:5px 10px;font-size:var(--t1)}
.btn.danger{color:var(--red);border-color:var(--red-soft)}
.icon-btn{border:0;background:none;width:36px;height:36px;border-radius:8px;display:grid;place-items:center;color:var(--ink-2)}
.icon-btn:hover{background:var(--paper-2)}
.field{display:flex;flex-direction:column;gap:6px}
.field label,.label{font-size:var(--t1);color:var(--ink-2);font-weight:600}
.input,select.input,textarea.input{width:100%;padding:9px 12px;border:1px solid var(--line-2);background:var(--paper);border-radius:8px;outline:none}
.input:focus{border-color:var(--ink-2)}
textarea.input{resize:vertical;min-height:84px;line-height:1.55}
.row{display:flex;gap:10px;align-items:center;flex-wrap:wrap}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.form-grid .full{grid-column:1/-1}

.chips{display:flex;gap:6px;flex-wrap:wrap}
.chip{border:1px solid var(--line-2);background:var(--paper);border-radius:999px;padding:5px 13px;font-size:var(--t1);color:var(--ink-2)}
.chip:hover{border-color:var(--ink-3)}
.chip.on{background:var(--ink);border-color:var(--ink);color:var(--paper)}
.tag{display:inline-flex;align-items:center;gap:5px;font-size:12px;border-radius:5px;padding:1px 8px;background:var(--paper-2);color:var(--ink-2);white-space:nowrap}
.dot{width:8px;height:8px;border-radius:50%;display:inline-block;flex:none}

/* ===== Countdown ===== */
.countdown{position:relative;overflow:hidden;background:#1f1d19;color:#f3eee1;border-color:#1f1d19}
[data-theme="dark"] .countdown{background:#0f0e0a;border-color:var(--line)}
.countdown::after{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,.04) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.04) 1px,transparent 1px);background-size:22px 22px;pointer-events:none}
.cd-top{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;align-items:flex-start;position:relative;z-index:1}
.cd-label{font-size:var(--t1);opacity:.7;letter-spacing:.06em}
.cd-title{font-family:var(--serif);font-size:var(--t3);margin-top:2px}
.cd-main{display:flex;align-items:flex-end;gap:clamp(14px,3vw,30px);margin:22px 0 10px;flex-wrap:wrap;position:relative;z-index:1}
.cd-days{font-family:var(--serif);font-size:clamp(4rem,3rem + 5vw,7.2rem);line-height:.85;font-weight:700;color:#fff;font-variant-numeric:tabular-nums}
.cd-days small{font-size:.22em;font-weight:400;margin-left:6px;opacity:.75}
.cd-hms{display:flex;gap:8px;padding-bottom:8px}
.cd-unit{background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.12);border-radius:8px;padding:6px 10px;text-align:center;min-width:58px}
.cd-unit b{display:block;font-family:var(--mono);font-size:1.4rem;line-height:1.1;font-variant-numeric:tabular-nums}
.cd-unit span{font-size:11px;opacity:.6}
.cd-foot{display:flex;gap:18px;flex-wrap:wrap;font-size:var(--t1);opacity:.85;position:relative;z-index:1}
.cd-foot b{color:#fff;font-variant-numeric:tabular-nums}
.stamp{border:1.5px solid var(--red);color:#ff8a7e;border-radius:6px;padding:2px 10px;font-size:var(--t1);transform:rotate(-3deg);font-family:var(--serif);white-space:nowrap}

/* Phase bar */
.phasebar{display:flex;height:10px;border-radius:5px;overflow:hidden;gap:2px;margin:10px 0 8px;position:relative}
.phasebar i{display:block;height:100%}
.phase-legend{display:flex;gap:14px;flex-wrap:wrap;font-size:var(--t1);color:var(--ink-2)}
.phase-legend span{display:inline-flex;gap:6px;align-items:center}
.ph-1{background:#7a8f6a}.ph-2{background:#2b5885}.ph-3{background:#b8342a}.ph-4{background:#a86a12}
.marker{position:absolute;top:-4px;bottom:-4px;width:2px;background:var(--ink)}
.timeline-wrap{position:relative;padding-top:6px}

/* Stat tiles */
.tiles{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
.tile{border:1px solid var(--line);border-radius:12px;padding:12px 14px;background:var(--paper)}
.tile b{display:block;font-family:var(--serif);font-size:1.7rem;line-height:1.2;font-variant-numeric:tabular-nums}
.tile span{font-size:var(--t1);color:var(--ink-3)}
.tile.alert b{color:var(--red)}

/* Tasks */
.tasks{list-style:none;margin:0;padding:0;display:flex;flex-direction:column}
.task{display:grid;grid-template-columns:auto 1fr auto;gap:12px;align-items:flex-start;padding:11px 0;border-bottom:1px dashed var(--line)}
.task:last-child{border-bottom:0}
.check{appearance:none;width:22px;height:22px;border:1.6px solid var(--line-2);border-radius:6px;margin:1px 0 0;display:grid;place-items:center;background:var(--paper);cursor:pointer;flex:none}
.check:checked{background:var(--green);border-color:var(--green)}
.check:checked::after{content:"";width:6px;height:11px;border:solid #fff;border-width:0 2px 2px 0;transform:rotate(45deg) translate(-1px,-1px)}
.task-title{font-weight:600}
.task.done .task-title{text-decoration:line-through;color:var(--ink-3)}
.task-detail{font-size:var(--t1);color:var(--ink-3);margin-top:2px}
.task-meta{font-size:var(--t1);color:var(--ink-3);white-space:nowrap;text-align:right}
.linkish{background:none;border:0;padding:0;color:var(--blue);text-decoration:underline;text-underline-offset:2px;font-size:inherit}

/* Progress bars */
.bars{display:flex;flex-direction:column;gap:12px}
.bar-row{display:grid;grid-template-columns:84px 1fr 48px;gap:10px;align-items:center;font-size:var(--t1)}
.bar-row .name{font-weight:600;color:var(--ink);font-size:var(--t2)}
.bar{height:8px;border-radius:4px;background:var(--paper-2);overflow:hidden;display:flex}
.bar i{display:block;height:100%}
.bar .m2{background:var(--green)}.bar .m1{background:var(--amber)}
.bar-row .pct{text-align:right;color:var(--ink-2);font-variant-numeric:tabular-nums}

.milestones{list-style:none;padding:0;margin:0}
.milestones li{display:grid;grid-template-columns:62px 1fr auto;gap:12px;padding:9px 0;border-bottom:1px solid var(--line);align-items:center}
.milestones li:last-child{border-bottom:0}
.ms-date{font-family:var(--serif);font-weight:700;font-variant-numeric:tabular-nums;line-height:1.15}
.ms-date small{display:block;font-family:var(--sans);font-weight:400;font-size:11px;color:var(--ink-3)}
.ms-left{font-size:var(--t1);color:var(--ink-2);font-variant-numeric:tabular-nums;white-space:nowrap}
.milestones li.past{opacity:.5}

/* ===== Topics ===== */
.subj-tabs{display:flex;gap:6px;overflow-x:auto;padding-bottom:4px;margin-bottom:18px;scrollbar-width:none}
.subj-tabs::-webkit-scrollbar{display:none}
.subj-tab{flex:none;border:1px solid var(--line-2);background:var(--paper);border-radius:10px;padding:8px 14px;display:flex;align-items:center;gap:8px;color:var(--ink-2)}
.subj-tab.on{background:var(--ink);color:var(--paper);border-color:var(--ink)}
.subj-tab .ring{font-size:11px;opacity:.75;font-variant-numeric:tabular-nums}
.subj-hero{display:grid;grid-template-columns:1fr auto;gap:18px;align-items:center;margin-bottom:18px}
.subj-hero h2{font-size:var(--t4)}
.score-badge{font-family:var(--serif);border:1.5px solid var(--red);color:var(--red);border-radius:8px;padding:4px 12px;font-weight:700;white-space:nowrap}
.module{margin-bottom:26px}
.module-title{font-family:var(--serif);font-size:var(--t3);display:flex;align-items:center;gap:10px;margin-bottom:12px}
.module-title::after{content:"";flex:1;height:1px;background:var(--line)}
.topic-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:14px}
.topic{background:var(--paper);border:1px solid var(--line);border-radius:var(--r);padding:16px 16px 14px;display:flex;flex-direction:column;gap:10px;border-left:4px solid var(--line-2)}
.topic[data-m="1"]{border-left-color:var(--amber)}
.topic[data-m="2"]{border-left-color:var(--green)}
.topic.flash{animation:flash 1.6s ease}
@keyframes flash{0%,40%{box-shadow:0 0 0 3px var(--red)}100%{box-shadow:0 0 0 0 transparent}}
.topic h3{font-size:1.05rem}
.topic ul{margin:0;padding-left:1.1em;color:var(--ink-2);font-size:.92rem;display:flex;flex-direction:column;gap:4px}
.topic .tip{font-size:var(--t1);background:var(--amber-soft);color:var(--ink);border-radius:6px;padding:7px 10px}
.topic .tip::before{content:"提示 ";font-weight:700;color:var(--amber)}
.topic-foot{display:flex;justify-content:space-between;align-items:center;gap:8px;margin-top:auto;padding-top:6px;flex-wrap:wrap}
.seg{display:inline-flex;border:1px solid var(--line-2);border-radius:8px;overflow:hidden}
.seg button{border:0;background:var(--paper);padding:5px 10px;font-size:var(--t1);color:var(--ink-2)}
.seg button+button{border-left:1px solid var(--line-2)}
.seg button.on[data-v="0"]{background:var(--red-soft);color:var(--red)}
.seg button.on[data-v="1"]{background:var(--amber-soft);color:var(--amber)}
.seg button.on[data-v="2"]{background:var(--green);color:#fff}
.searchbox{position:relative;min-width:240px;flex:1;max-width:360px}
.searchbox input{padding-left:34px}
.searchbox svg{position:absolute;left:11px;top:50%;transform:translateY(-50%);width:16px;height:16px;stroke:var(--ink-3);fill:none;stroke-width:2}
mark{background:var(--amber-soft);color:inherit;border-radius:3px;padding:0 2px}

/* ===== Plan ===== */
.week-nav{display:flex;align-items:center;gap:8px}
.week{display:grid;grid-template-columns:repeat(7,minmax(0,1fr));gap:10px}
.day{background:var(--paper);border:1px solid var(--line);border-radius:12px;padding:12px;min-height:220px;display:flex;flex-direction:column;gap:8px}
.day.today{border-color:var(--red);box-shadow:0 0 0 1px var(--red)}
.day.past{opacity:.72}
.day-head{display:flex;justify-content:space-between;align-items:baseline}
.day-head b{font-family:var(--serif);font-size:1.15rem}
.day-head span{font-size:11px;color:var(--ink-3)}
.mini-task{display:flex;gap:7px;align-items:flex-start;font-size:12.5px;line-height:1.4;padding:6px 7px;border-radius:7px;background:var(--paper-2)}
.mini-task .check{width:16px;height:16px;border-radius:4px}
.mini-task .check:checked::after{width:4px;height:8px}
.mini-task.done span{text-decoration:line-through;color:var(--ink-3)}
.mini-task small{display:block;color:var(--ink-3);font-size:11px}
.day-pct{margin-top:auto;font-size:11px;color:var(--ink-3)}
.phase-cards{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}
.phase-card{border:1px solid var(--line);border-radius:12px;padding:14px;background:var(--paper);position:relative}
.phase-card.now{border-color:var(--ink);box-shadow:inset 0 0 0 1px var(--ink)}
.phase-card.now::before{content:"当前阶段";position:absolute;top:-10px;right:12px;background:var(--red);color:#fff;font-size:11px;padding:1px 8px;border-radius:4px}
.phase-card h3{font-size:1rem;display:flex;align-items:center;gap:8px}
.phase-card .when{font-size:var(--t1);color:var(--ink-3);margin:4px 0 8px;font-variant-numeric:tabular-nums}
.phase-card p{font-size:.88rem;color:var(--ink-2)}

/* ===== Wrong book ===== */
.toolbar{display:flex;gap:10px;flex-wrap:wrap;align-items:center;margin-bottom:16px}
.wlist{display:grid;grid-template-columns:repeat(auto-fill,minmax(330px,1fr));gap:14px}
.wcard{background:var(--paper);border:1px solid var(--line);border-radius:var(--r);padding:16px;display:flex;flex-direction:column;gap:10px;position:relative}
.wcard.mastered{opacity:.75}
.wcard .q{white-space:pre-wrap;word-break:break-word}
.wcard .q.clamp{display:-webkit-box;-webkit-line-clamp:4;-webkit-box-orient:vertical;overflow:hidden}
.wcard img,.review-img{max-width:100%;max-height:220px;object-fit:contain;border-radius:8px;border:1px solid var(--line);background:#fff}
.wmeta{display:flex;gap:6px;flex-wrap:wrap;align-items:center}
.wfoot{display:flex;justify-content:space-between;align-items:center;gap:8px;margin-top:auto;font-size:var(--t1);color:var(--ink-3);flex-wrap:wrap}
.stage{display:inline-flex;gap:3px}
.stage i{width:14px;height:5px;border-radius:3px;background:var(--line)}
.stage i.on{background:var(--green)}
.due-flag{position:absolute;top:-1px;right:14px;background:var(--red);color:#fff;font-size:11px;padding:2px 8px;border-radius:0 0 6px 6px}
.empty{border:1.5px dashed var(--line-2);border-radius:var(--r-lg);padding:44px 20px;text-align:center;color:var(--ink-2);display:flex;flex-direction:column;align-items:center;gap:12px}
.empty h3{font-size:1.15rem;color:var(--ink)}
.cause-chart{display:flex;flex-direction:column;gap:8px}
.answer-box{border:1px solid var(--line);background:var(--paper-2);border-radius:8px;padding:12px;white-space:pre-wrap;word-break:break-word}
.answer-box .label{display:block;margin-bottom:4px}
.review-actions{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}
.review-actions .btn{padding:12px}
.progress-thin{height:4px;background:var(--paper-2);border-radius:2px;overflow:hidden;margin-bottom:14px}
.progress-thin i{display:block;height:100%;background:var(--red);transition:width .3s}

/* ===== Settings ===== */
.table{width:100%;border-collapse:collapse;font-size:.9rem}
.table th,.table td{text-align:left;padding:9px 10px;border-bottom:1px solid var(--line);vertical-align:top}
.table th{font-size:var(--t1);color:var(--ink-3);font-weight:600;white-space:nowrap}
.table td:first-child{white-space:nowrap}
.table td:nth-child(2){font-family:var(--serif);font-weight:700;white-space:nowrap}
.note{font-size:var(--t1);color:var(--ink-3);border-left:3px solid var(--line-2);padding:4px 10px;margin-top:10px}

/* ===== Modal / toast ===== */
.modal{position:fixed;inset:0;z-index:50;display:grid;place-items:center;padding:16px}
.modal-backdrop{position:absolute;inset:0;background:rgba(20,16,8,.45)}
.modal-card{position:relative;background:var(--paper);border-radius:var(--r-lg);width:min(680px,100%);max-height:92dvh;display:flex;flex-direction:column;box-shadow:0 30px 80px -30px rgba(0,0,0,.5);border:1px solid var(--line)}
.modal-head{display:flex;justify-content:space-between;align-items:center;padding:16px 20px;border-bottom:1px solid var(--line)}
.modal-head h2{font-size:var(--t3)}
.modal-body{padding:18px 20px 20px;overflow:auto}
.modal-actions{display:flex;justify-content:flex-end;gap:10px;margin-top:18px;flex-wrap:wrap}
.toast{position:fixed;left:50%;bottom:28px;transform:translate(-50%,20px);background:var(--ink);color:var(--paper);padding:10px 18px;border-radius:10px;font-size:var(--t2);opacity:0;pointer-events:none;transition:.25s;z-index:60;max-width:90vw}
.toast.show{opacity:1;transform:translate(-50%,0)}
.img-drop{border:1.5px dashed var(--line-2);border-radius:8px;padding:12px;display:flex;gap:12px;align-items:center;flex-wrap:wrap}
.img-drop img{max-height:120px;border-radius:6px}

/* ===== Responsive ===== */
@media (max-width:1100px){
  .week{grid-template-columns:repeat(4,minmax(0,1fr))}
  .phase-cards{grid-template-columns:1fr 1fr}
}

/* 学习内容（教材） */
.grade-bars{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:8px}
.gbar{display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:10px;border:1px solid var(--line);background:var(--paper);border-radius:10px;padding:8px 12px;color:var(--ink-2);text-align:left}
.gbar:hover{border-color:var(--ink-3)}
.gbar.on{border-color:var(--ink);box-shadow:inset 0 0 0 1px var(--ink)}
.gbar .gname{font-weight:600;font-size:var(--t1)}
.gbar .bar{height:6px;background:var(--paper-2);border-radius:99px;overflow:hidden}
.gbar .bar i{display:block;height:100%;border-radius:99px}
.ch-links{display:flex;flex-wrap:wrap;gap:6px;align-items:center;margin:10px 0 2px}
.linktag{border:1px solid var(--line-2);cursor:pointer;white-space:normal;text-align:left}
.linktag:hover{border-color:var(--red);color:var(--red)}
.src summary{cursor:pointer;font-weight:600}
.src ul{padding-left:18px;display:grid;gap:4px}
.src a{color:var(--ink-2);word-break:break-all}

/* AI 讲解 */
.ai-btn{color:var(--blue);border-color:color-mix(in srgb,var(--blue) 35%,var(--line-2))}
.ai-btn:hover{background:color-mix(in srgb,var(--blue) 8%,var(--paper))}
.chapter .topic-foot{flex-wrap:wrap;gap:8px}
.modal.wide .modal-card{width:min(820px,100%)}
.ai-box{display:flex;flex-direction:column;gap:14px}
.ai-out{font-size:var(--t2);line-height:1.8;color:var(--ink);overflow-wrap:anywhere}
.ai-a h4{font-family:var(--serif);font-size:var(--t3);margin:16px 0 6px;padding-left:10px;border-left:3px solid var(--red)}
.ai-a h4:first-child{margin-top:0}
.ai-a p{margin:6px 0}
.ai-a ul,.ai-a ol{padding-left:22px;margin:6px 0}
.ai-a li{margin:3px 0}
.ai-a code{background:var(--paper-2);border-radius:4px;padding:0 5px;font-size:.92em}
.ai-a hr{border:0;border-top:1px dashed var(--line-2);margin:14px 0}
.ai-q{margin:16px 0 8px auto;max-width:85%;width:fit-content;background:var(--paper-2);border-radius:12px 12px 2px 12px;padding:8px 12px;font-size:var(--t2)}
.ai-err{margin-top:10px;color:var(--red);background:var(--red-soft);border-radius:8px;padding:10px 12px;font-size:var(--t1)}
.ai-tools{display:flex;flex-direction:column;gap:10px;border-top:1px solid var(--line);padding-top:12px}
.ai-ask{display:flex;gap:8px}
.ai-ask .input{flex:1;min-width:0}
.ai-foot{display:flex;justify-content:space-between;align-items:center;gap:8px;flex-wrap:wrap}

/* 自测练习 */
.tiles.q-tiles{grid-template-columns:repeat(4,1fr)}
.qmodes{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:8px}
.qmode{text-align:left;border:1px solid var(--line-2);background:var(--paper);border-radius:12px;padding:12px;display:flex;flex-direction:column;gap:4px;cursor:pointer;color:var(--ink);font:inherit}
.qmode b{font-size:var(--t2)}
.qmode span{font-size:var(--t1);color:var(--ink-3);line-height:1.5}
.qmode:hover{border-color:var(--ink-3)}
.qmode.on{border-color:var(--red);background:var(--red-soft)}
.qmode.on span{color:var(--ink-2)}
.q-opts{gap:18px;align-items:flex-start;flex-wrap:wrap}
.qhist{list-style:none;margin:0;padding:0;display:flex;flex-direction:column}
.qhist li+li{border-top:1px solid var(--line)}
.qhist-btn{width:100%;display:flex;justify-content:space-between;align-items:center;gap:10px;background:none;border:0;padding:10px 2px;cursor:pointer;color:var(--ink);font:inherit;text-align:left}
.qhist-btn span{display:flex;flex-direction:column;min-width:0}
.qhist-btn small{color:var(--ink-3);font-size:var(--t1)}
.qhist-btn:hover b{color:var(--red)}
.score{font-style:normal;font-weight:700;font-variant-numeric:tabular-nums;padding:2px 10px;border-radius:999px;font-size:var(--t1);flex:none}
.score.ok,.score-big.ok b{color:var(--green)}.score.ok{background:var(--green-soft)}
.score.mid,.score-big.mid b{color:var(--amber)}.score.mid{background:var(--amber-soft)}
.score.low,.score-big.low b{color:var(--red)}.score.low{background:var(--red-soft)}
.q-head{display:flex;justify-content:space-between;align-items:center;gap:8px;flex-wrap:wrap;margin-bottom:8px}
.q-text{font-size:var(--t3);line-height:1.7;margin:16px 0 14px;white-space:pre-wrap;overflow-wrap:anywhere}
.qopts{display:flex;flex-direction:column;gap:8px}
.qopt{display:flex;align-items:flex-start;gap:12px;text-align:left;border:1px solid var(--line-2);background:var(--paper);border-radius:12px;padding:12px 14px;cursor:pointer;font:inherit;color:var(--ink);line-height:1.6;min-height:48px}
.qopt i{font-style:normal;flex:none;width:26px;height:26px;border-radius:50%;border:1px solid var(--line-2);display:grid;place-items:center;font-size:var(--t1);font-weight:600;color:var(--ink-2)}
.qopt span{overflow-wrap:anywhere}
.qopt:hover:not(:disabled){border-color:var(--ink-3)}
.qopt.sel{border-color:var(--ink);background:var(--paper-2)}
.qopt.sel i{background:var(--ink);color:var(--paper);border-color:var(--ink)}
.qopt.right{border-color:var(--green);background:var(--green-soft)}
.qopt.right i{background:var(--green);color:#fff;border-color:var(--green)}
.qopt.wrong{border-color:var(--red);background:var(--red-soft)}
.qopt.wrong i{background:var(--red);color:#fff;border-color:var(--red)}
.qopt:disabled{cursor:default;color:var(--ink)}
.qexp{margin-top:14px;border-radius:12px;padding:12px 14px;font-size:var(--t2);line-height:1.7}
.qexp.ok{background:var(--green-soft)}.qexp.ok b{color:var(--green)}
.qexp.bad{background:var(--red-soft)}.qexp.bad b{color:var(--red)}
.qexp p{margin:6px 0 0}
.qdots{display:flex;flex-wrap:wrap;gap:6px;margin:10px 0 0}
.qdot{width:30px;height:30px;border-radius:8px;border:1px solid var(--line-2);background:var(--paper);font:inherit;font-size:12px;color:var(--ink-2);cursor:pointer}
.qdot.done{background:var(--paper-2);color:var(--ink)}
.qdot.cur{border-color:var(--red);color:var(--red);font-weight:700}
.q-result{display:flex;align-items:center;gap:18px;padding:6px 0 14px;border-bottom:1px solid var(--line)}
.score-big{display:flex;align-items:baseline;gap:4px;flex:none}
.score-big b{font-size:48px;font-family:var(--serif);line-height:1}
.score-big span{color:var(--ink-3);font-size:var(--t3)}
.q-sec{font-size:var(--t2);margin:16px 0 8px;font-weight:600}
.q-topics{list-style:none;margin:0;padding:0}
.q-topics li{display:grid;grid-template-columns:1fr auto auto;gap:12px;align-items:center;padding:8px 0;border-bottom:1px dashed var(--line)}
.q-topics .ok,.qwrong .ok{color:var(--green)}.q-topics .low,.qwrong .bad{color:var(--red)}
.qwrong{border:1px solid var(--line);border-radius:12px;padding:12px 14px}
.qwrong .q-text{font-size:var(--t2)}
@media (max-width:760px){.tiles.q-tiles{grid-template-columns:repeat(2,1fr)}.qmodes{grid-template-columns:1fr 1fr}.q-topics li{grid-template-columns:1fr auto}.q-topics li>span:last-child{grid-column:1/-1}.score-big b{font-size:40px}}
@media (max-width:900px){
  .g-home,.g-2{grid-template-columns:1fr}
}
@media (max-width:760px){
  .app{grid-template-columns:minmax(0,1fr)}
  .sidebar{position:fixed;top:auto;bottom:0;left:0;right:0;height:auto;flex-direction:row;padding:6px 6px calc(6px + env(safe-area-inset-bottom));border-right:0;border-top:1px solid var(--line);z-index:40}
  .brand,.side-foot{display:none}
  .nav{flex-direction:row;width:100%;justify-content:space-around}
  .nav button{flex-direction:column;gap:2px;padding:6px 2px;font-size:11px;flex:1;align-items:center;min-width:0}
  .nav button.active{background:none;color:var(--red)}
  .nav .badge{position:absolute;top:0;right:calc(50% - 22px);height:16px;min-width:16px;font-size:10px;padding:0 4px}
  .main{padding:20px 14px calc(96px + env(safe-area-inset-bottom))}
  .week{grid-template-columns:1fr}
  .day{min-height:0}
  .phase-cards{grid-template-columns:1fr}
  .tiles{grid-template-columns:repeat(3,1fr);gap:8px}
  .tile{padding:10px}
  .tile b{font-size:1.4rem}
  .form-grid{grid-template-columns:1fr}
  .topic-grid,.wlist{grid-template-columns:1fr}
  .grade-bars{grid-template-columns:1fr 1fr}
  .gbar{grid-template-columns:1fr auto;gap:4px 8px}
  .gbar .bar{grid-column:1/-1;grid-row:2}
  .cd-unit{min-width:50px;padding:5px 7px}
  .cd-unit b{font-size:1.15rem}
  .subj-hero{grid-template-columns:1fr}
  .searchbox{max-width:none;min-width:0;width:100%}
  .bar-row{grid-template-columns:86px 1fr 36px}
  .review-actions .btn{padding:10px 6px}
  .modal{place-items:end center;padding:0}
  .modal-card{border-radius:16px 16px 0 0;max-height:94dvh}
}
@media print{.sidebar,.toolbar,.btn{display:none!important}.app{display:block}}
/* 账号与同步 */
.seg button.on:not([data-v]){background:var(--ink);color:var(--paper)}
#modalBody .seg{display:flex}#modalBody .seg button{flex:1;padding:8px 10px;font-size:var(--t2)}
.cl-user{display:flex;align-items:center;gap:12px}
.cl-avatar{width:42px;height:42px;border-radius:50%;background:var(--red);color:#fff;display:grid;place-items:center;font-family:var(--serif);font-size:19px;font-weight:700;flex:none}
.linkbtn{border:0;background:none;padding:0;color:var(--ink-3);font-size:var(--t1);text-decoration:underline;text-underline-offset:3px}
.linkbtn:hover{color:var(--ink)}.linkbtn.danger-text{color:var(--red)}
.check-line{display:flex!important;flex-direction:row!important;align-items:flex-start;gap:8px;cursor:pointer}
.check-line input{margin-top:4px;flex:none;width:16px;height:16px;accent-color:var(--red)}
.cl-banner{display:flex;align-items:center;justify-content:space-between;gap:12px;background:var(--paper);border:1px solid var(--line);border-left:3px solid var(--red);border-radius:10px;padding:10px 12px 10px 14px;margin-bottom:16px;font-size:var(--t2)}
.side-foot[data-go]{cursor:pointer;border-radius:8px}.side-foot[data-go]:hover{background:var(--paper-2);color:var(--ink)}
@media (max-width:760px){.cl-banner{flex-direction:column;align-items:stretch}.cl-banner .row{justify-content:space-between}}
.check-line a{color:var(--red)}
.icp-foot{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;padding:24px 0 8px;font-size:12px;color:var(--ink-3)}.icp-foot a{color:inherit}