:root{--ink:#23483d;--muted:#758078;--paper:#faf8f0;--line:#e4e8dc;--green:#2c6653;--mint:#e8efe4;--gold:#eab560;--coral:#c77753;--base:18px;font-family:"Microsoft YaHei","PingFang SC",system-ui,sans-serif;color:var(--ink);background:var(--paper);font-size:var(--base)}
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@media(max-width:1000px){.classroom-shell{grid-template-columns:220px 1fr}.sidebar{padding:24px 15px}main{padding:25px 24px}.stage-tabs button{padding:10px 11px}.landscape-card{aspect-ratio:2;min-height:240px}.topbar{padding:0 24px}.offline-badge{display:none}.scene-message{max-width:46%;font-size:12px}}
@media(max-width:720px){.topbar{height:auto;min-height:80px;padding:16px;flex-wrap:wrap}.brand strong{font-size:19px}.brand-mark{width:42px;height:42px}.top-actions{gap:3px}.top-actions .quiet-button{padding:10px}.top-actions .dark-button{padding:10px 12px;font-size:13px}.classroom-shell{display:block}.sidebar{border-right:0;border-bottom:1px solid var(--line);min-height:0;padding:18px}.sidebar>.eyebrow,.sidebar-rule,.sidebar-foot,.notebook-card,.mode-description{display:none}.mode-switch{max-width:320px}.grade-picker{max-width:320px;margin:10px 0}.sidebar nav{display:grid;grid-template-columns:1fr 1fr;margin-top:15px;gap:5px}.lesson-button{margin:0;padding:10px}.lesson-button strong{font-size:13px}.lesson-button small{display:none}main{padding:22px 18px}.course-heading{gap:12px}.source-button{padding:10px;font-size:12px}.stage-tabs{gap:4px}.stage-tabs button{padding:10px;font-size:13px}.stage-tabs button span{margin-right:5px}.landscape-card{min-height:235px;aspect-ratio:1.5}.scene-caption{top:16px;left:16px;right:16px}.scene-action{left:15px;bottom:16px;font-size:12px;padding:10px}.scene-message{right:12px;bottom:61px;max-width:72%;font-size:12px}.guide-card{padding:18px 15px;gap:12px}.guide-avatar{display:none}.guide-card p{font-size:16px}.next-row>span{font-size:12px}.main-footer{flex-direction:column;gap:6px}.reading-card,.activity-card,.quiz-card,.note-card,.ask-card,.explanation-card{padding:20px}.ask-actions{align-items:flex-start;flex-direction:column}.reading-text,body.preschool .reading-text{font-size:23px}}
.sidebar nav{max-height:440px;overflow-y:auto;scrollbar-width:thin;padding-right:4px}.culture-section{background:#f0eddf;border:1px solid #e4ddca;border-radius:20px;padding:26px;margin:20px 0}.culture-heading{display:flex;align-items:center;justify-content:space-between;gap:12px}.culture-heading h2{margin:6px 0}.culture-heading>span{font-size:12px;color:var(--muted)}.culture-lead{color:var(--muted);font-size:14px}.culture-cards{display:grid;gap:12px}.culture-card{background:#fffdf7;border:1px solid var(--line);border-radius:13px;padding:0 18px}.culture-card summary{display:flex;align-items:center;gap:12px;cursor:pointer;padding:18px 0;list-style:none}.culture-card summary::after{content:'＋';margin-left:auto;color:var(--green);font-size:23px}.culture-card[open] summary::after{content:'−'}.culture-card summary:focus-visible{outline:3px solid var(--gold);outline-offset:3px}.culture-kind{background:#edf1e6;border-radius:6px;padding:5px 8px;color:var(--green);font-size:11px;white-space:nowrap}.culture-card p{font-size:18px;white-space:pre-line;margin:0 0 15px}.culture-source{display:block;color:var(--muted);line-height:1.7;font-size:12px}.culture-actions,.question-chips{display:flex;gap:8px;flex-wrap:wrap;margin:14px 0}.culture-actions .task-item,.question-chips .task-item{padding:9px 12px;font-size:13px}.question-chips .task-item{text-align:left;background:#eef2e7}.culture-actions{padding-bottom:6px}body.preschool .culture-card p{font-size:22px;line-height:1.9}
@media(max-width:720px){.sidebar nav{max-height:none}.culture-section{padding:18px}.culture-heading{display:block}.culture-card{padding:0 13px}.culture-card summary{gap:7px}.culture-card summary strong{font-size:15px}.culture-card p,body.preschool .culture-card p{font-size:18px}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important}}
@media print{.topbar,.classroom-shell,.toast,dialog:not(#notebook-dialog){display:none!important}#notebook-dialog{display:block;position:static;max-width:none;width:100%;max-height:none;border:0;padding:0}#notebook-dialog .close-button,#notebook-dialog .dialog-actions{display:none}#notebook-dialog::backdrop{display:none}.notebook-item{break-inside:avoid}body{background:white}}
.culture-source{text-align:right;margin:8px 0 2px}.culture-source a{color:var(--green);text-decoration:none;border-bottom:1px dotted #9cac91}.culture-source a:hover{text-decoration:underline}
.museum-exhibit{width:100%;padding:18px;border:1px solid #d9d8c7;border-radius:18px;background:linear-gradient(145deg,#fbfaf0,#e8efe4);box-sizing:border-box}.museum-exhibit-top{display:flex;justify-content:space-between;gap:12px;align-items:center;margin-bottom:12px}.museum-progress{font-size:12px;color:var(--green);font-weight:700}.museum-object{position:relative;width:min(100%,560px);height:180px;margin:0 auto;border:10px solid #c49b68;border-bottom-width:18px;border-radius:9px;background:radial-gradient(circle at 50% 45%,#fff9df 0 18%,transparent 19%),repeating-linear-gradient(45deg,#7c9e88 0 12px,#f1d58f 12px 24px,#c77e5d 24px 36px);box-shadow:inset 0 0 0 5px #f4e9c8,0 8px 18px #53684b20;transition:transform .35s ease,filter .35s ease}.museum-object::after{content:'示意展品 · 图片和模型可替换';position:absolute;right:9px;bottom:7px;background:#fffdf0cc;color:#697968;font-size:10px;padding:4px 7px;border-radius:5px}.museum-object.zoomed{transform:scale(1.16);filter:saturate(1.1)}.museum-object.turned{transform:perspective(500px) rotateY(24deg)}.museum-object.zoomed.turned{transform:perspective(500px) rotateY(24deg) scale(1.16)}.museum-pattern{position:absolute;left:30%;top:24%;width:40%;height:52%;display:grid;grid-template-columns:repeat(3,1fr);gap:8px;transform:rotate(-8deg)}.museum-pattern i{display:block;border:4px solid #fff2c7;border-radius:50%;background:#72947d;box-shadow:0 0 0 4px #c67f5e}.museum-hotspot{position:absolute;z-index:2;width:28px;height:28px;display:grid;place-items:center;border:3px solid #fffaf0;border-radius:50%;background:#2c6653;color:white;font-weight:700;cursor:pointer;box-shadow:0 3px 8px #243b2b55;transition:transform .2s,background .2s}.museum-hotspot:hover,.museum-hotspot:focus{transform:scale(1.18);outline:3px solid #e7bc66}.museum-hotspot.found{background:#c57955}.hotspot-a{left:22%;top:25%}.hotspot-b{left:72%;top:30%}.hotspot-c{left:48%;bottom:17%}.museum-controls{display:flex;justify-content:center;gap:10px;flex-wrap:wrap;margin:18px 0 8px}.museum-controls .task-item{padding:9px 13px;min-height:0;background:#fffdf7}.museum-detail{margin:8px 0 0;padding:12px;border-radius:10px;background:#ffffffa8;color:#516957;font-size:14px;line-height:1.7}.museum-exhibit+.task-item{margin-top:8px}
.chat-sources{display:flex;flex-wrap:wrap;gap:6px;align-items:center;margin-top:12px;padding-top:9px;border-top:1px solid var(--line);font-size:12px;color:var(--muted)}.chat-sources a{color:var(--green);text-decoration:none;border-bottom:1px dotted #9cac91}.chat-sources a:hover{text-decoration:underline}
.answer-quality{display:block;margin-top:8px;color:var(--muted);font-size:11px}
.homework-panel{margin-top:24px;padding:24px;border:1px solid var(--line);border-radius:24px;background:rgba(255,252,241,.92)}
.homework-heading{display:flex;justify-content:space-between;gap:18px;align-items:flex-start;margin-bottom:18px}.homework-heading h2{margin:4px 0 6px}.homework-heading p{margin:0;color:var(--muted)}
.role-switch{display:flex;gap:6px;padding:4px;border-radius:999px;background:var(--mint)}.role-switch button{border:0;background:transparent;border-radius:999px;padding:8px 13px;color:var(--muted);cursor:pointer}.role-switch button.active{background:var(--green);color:#fff}
.homework-grid,.teacher-homework{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.homework-card{padding:18px;border-radius:18px;background:#fff;border:1px solid var(--line)}.homework-card h3{margin:0 0 12px}.homework-card label{display:block;margin:10px 0;color:var(--muted);font-size:13px}.homework-card input,.homework-card textarea{display:block;width:100%;margin-top:6px;border:1px solid var(--line);border-radius:10px;padding:10px;background:#fffdf5;font:inherit;box-sizing:border-box}.homework-card textarea{resize:vertical}.form-row{display:grid;grid-template-columns:1fr 1fr;gap:10px}.assignment-item,.submission-item{padding:12px 0;border-bottom:1px solid var(--line)}.assignment-item:last-child,.submission-item:last-child{border-bottom:0}.assignment-item strong,.submission-item strong{display:block}.assignment-item small,.submission-item small{display:block;color:var(--muted);margin:5px 0}.assignment-item p,.submission-item p{margin:6px 0 10px;font-size:14px;line-height:1.6}.muted{color:var(--muted);font-size:13px}
@media(max-width:720px){.homework-panel{margin:16px;padding:16px;border-radius:18px}.homework-heading{display:block}.role-switch{margin-top:14px;width:max-content}.homework-grid,.teacher-homework{grid-template-columns:1fr}.form-row{grid-template-columns:1fr}}
.daily-card{display:grid;grid-template-columns:1.25fr .75fr;gap:16px;margin:18px 0;padding:18px 20px;border:1px solid #e4ddca;border-radius:20px;background:linear-gradient(135deg,#fff8dc,#edf1e6)}.daily-card h2{margin:6px 0 8px;color:var(--green);font-size:21px}.daily-card p{margin:5px 0;line-height:1.7}.daily-question{color:var(--muted);font-size:14px}.daily-task{align-self:stretch;padding:14px;border-radius:14px;background:rgba(255,255,255,.65)}.daily-task strong{color:var(--orange)}.daily-task small{display:block;margin-top:8px;color:var(--muted);font-size:11px;line-height:1.5;text-align:right}@media(max-width:720px){.daily-card{display:block;padding:16px;margin:14px 0}.daily-card h2{font-size:19px}.daily-task{margin-top:12px}.daily-task small{font-size:11px}}
.guide-avatar{overflow:hidden;background:linear-gradient(145deg,#dcefe5,#f5e3ae);border:1px solid #d5d9c8}.guide-avatar img{width:100%;height:100%;object-fit:cover;object-position:50% 12%;transform:scale(1.35);transform-origin:center top}.landscape-card{background-image:linear-gradient(180deg,rgba(32,66,57,.08),rgba(32,66,57,.35)),url('assets/backgrounds/home-grassland-v1.png');background-size:cover;background-position:center 58%}.landscape-card .scene-art{background:transparent}.scene-caption{z-index:2}.scene-action,.scene-message{z-index:3}@media(max-width:720px){.topbar{position:sticky;top:0;z-index:10;background:rgba(255,253,247,.96);backdrop-filter:blur(10px)}.brand-mark{background:var(--green);overflow:hidden;font-size:0}.brand-mark::before{content:'';display:block;width:100%;height:100%;background:url('assets/ip/sheep-mascot-v1.png') center 15%/190% auto no-repeat}.guide-avatar{display:block;flex:0 0 58px;width:58px;height:58px;border-radius:18px}.guide-avatar img{transform:scale(1.55)}.landscape-card{min-height:260px;aspect-ratio:auto;background-position:center 58%}.scene-art{min-height:220px}.course-heading h1{font-size:28px}.stage-tabs{position:sticky;top:80px;z-index:8;background:rgba(255,253,247,.95);padding:8px 0;backdrop-filter:blur(8px)}.stage-tabs button{flex:1;min-height:44px}.culture-source{font-size:12px}}
.museum-challenge{margin-top:16px;padding:18px;border-radius:16px;background:#fffdf7;border:1px solid #dddcc9}.museum-challenge-heading{display:flex;justify-content:space-between;gap:12px;align-items:end}.museum-challenge-heading strong{font-size:15px;color:var(--green)}.museum-task-tabs{display:flex;gap:8px;margin:15px 0 10px}.museum-task-tab{padding:8px 12px;border-radius:9px;background:#edf2e9;color:var(--green);font-size:13px}.museum-task-tab.active{background:var(--green);color:#fff}.museum-task-panel{padding:12px;background:#f4f1e5;border-radius:11px}.museum-task-panel p{margin:0 0 11px;font-size:14px;color:#566858}.museum-tiles,.museum-evidence-options{display:flex;gap:8px;flex-wrap:wrap}.museum-tiles button,.museum-evidence-options button{padding:10px 12px;border:1px solid #d7ddce;background:#fff;border-radius:9px;color:#4b6655;font-size:13px}.museum-tiles button.correct,.museum-evidence-options button.correct{background:#d2e6cf;border-color:#77a77b}.museum-task-feedback{display:block;color:#6b786c;margin-top:10px;line-height:1.6}.museum-passport{margin-top:13px;padding-top:11px;border-top:1px dashed #d6d8c9;font-size:12px;color:#7a826f}.museum-passport span{margin-left:12px;color:#80927f}.museum-passport span:first-child{margin-left:8px}
.learning-goal{margin:10px 0 0!important;padding:10px 13px;border-left:4px solid var(--gold);border-radius:8px;background:#f5f0df;color:#5c6b56;font-size:14px!important;line-height:1.6}.result-card{margin-top:18px;padding:20px;border:1px solid #dfe4d6;border-radius:16px;background:linear-gradient(135deg,#f8f6e9,#edf3e8)}.result-card h3{margin:7px 0 6px;color:var(--green);font-size:19px}.result-card p{margin:0 0 12px;color:#5b6d5e;line-height:1.7;font-size:14px}.recommend-reason{margin:10px 0 14px;padding:10px 12px;border-radius:10px;background:rgba(255,255,255,.68);color:#53695a;font-size:12px;line-height:1.6}.recommend-metrics{display:flex;flex-wrap:wrap;gap:6px;margin-top:6px}.recommend-metrics span{padding:3px 7px;border-radius:999px;background:#e5efe4;color:#3f654d}
.museum-video-wrap{margin:10px 0 16px;padding:10px;border-radius:12px;background:#263f36}.museum-video-wrap video{display:block;width:100%;max-height:280px;border-radius:8px;background:#14251f}.museum-video-wrap small{display:block;margin-top:8px;color:#dfe9d8;font-size:11px;line-height:1.5}
.kashgar-video-card{padding:16px;border-radius:14px;background:#263f36;color:#eef5e7}.kashgar-video-card video{display:block;width:100%;margin:10px 0;border-radius:8px;background:#14251f}.kashgar-video-card small{display:block;color:#dfe9d8;line-height:1.6;font-size:11px}
.practice-entry{width:100%;display:flex;justify-content:space-between;align-items:center;margin-top:18px}.practice-intro{color:var(--muted);line-height:1.7}#practice-dialog{width:min(860px,calc(100vw - 32px));box-sizing:border-box}.practice-gallery{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;margin-top:18px}.practice-gallery figure{margin:0;overflow:hidden;border:1px solid var(--line);border-radius:13px;background:#f4f0e3}.practice-gallery img{display:block;width:100%;height:150px;object-fit:cover}.practice-gallery figcaption{padding:9px 11px;color:#5c6d5f;font-size:13px}@media(max-width:720px){.practice-gallery{grid-template-columns:repeat(2,minmax(0,1fr));gap:9px}.practice-gallery img{height:105px}.practice-gallery figcaption{font-size:11px;padding:7px}}

.usage-table{width:100%;border-collapse:collapse;margin-top:8px;font-size:14px;}
.usage-table th{text-align:left;font-weight:500;color:var(--muted,#6b6b6b);padding:6px 8px;border-bottom:1px solid rgba(0,0,0,.08);width:45%;}
.usage-table td{padding:6px 8px;border-bottom:1px solid rgba(0,0,0,.08);}

/* ===== 今日导学 / 课堂助教（沿用项目配色与圆角描边语言） ===== */
.gd-today{margin-top:16px}
.gd-hero{display:grid;grid-template-columns:150px minmax(0,1fr);gap:18px;align-items:center;padding:16px 18px;border:1px solid #e4ddca;border-radius:16px;background:linear-gradient(135deg,#fff8dc,#edf1e6)}
.gd-art{height:170px;display:flex;align-items:flex-end;justify-content:center;border-radius:12px;background:linear-gradient(180deg,#eef3e6,#f7f1dc);overflow:hidden}
.gd-art img{height:100%;width:auto;object-fit:contain;object-position:center bottom}
.gd-name{font-size:12px;color:var(--coral);letter-spacing:1px;margin-bottom:8px}
.gd-bubble{margin:0 0 12px;padding:13px 15px;border:1px solid #e4dcc4;border-radius:13px 13px 13px 3px;background:#fffdf7;color:#3f5245;font-size:16px;line-height:1.75}
.gd-listen{display:inline-flex;align-items:center;gap:8px;padding:8px 14px;border:1px solid #cdd9c8;border-radius:999px;background:#eef2e7;color:var(--green);font-size:13px;cursor:pointer}
.gd-tri{width:0;height:0;border-left:9px solid var(--green);border-top:6px solid transparent;border-bottom:6px solid transparent}
.gd-steps{display:flex;gap:8px;flex-wrap:wrap;margin:18px 0 14px}
.gd-step{padding:9px 15px;border:1px solid var(--line);border-radius:999px;background:#fbfcf7;color:var(--muted);font-size:14px;cursor:pointer}
.gd-step.active{background:var(--green);color:#fffdf6;border-color:var(--green)}
.gd-panel{padding:22px 24px;border:1px solid var(--line);border-radius:18px;background:#fffdf6}
.gd-label{display:inline-block;color:var(--coral);font-size:12px;font-weight:600;letter-spacing:1.5px;margin-bottom:12px}
.gd-title{margin:6px 0 12px;color:var(--green);font-size:20px}
.gd-q{margin:0 0 14px;font-size:17px;font-weight:600;line-height:1.6;color:var(--ink)}
.gd-teach{margin:0 0 12px;font-size:16px;line-height:1.8;color:#3f5245}
.gd-guide{margin:0;padding:11px 13px;border-left:4px solid var(--gold);border-radius:8px;background:#f6f0de;color:#5c6b56;font-size:15px;line-height:1.7;white-space:pre-line}
.gd-options{display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:10px}
.gd-option{padding:12px 14px;border:1px solid #d8d9c5;border-radius:11px;background:#fffdf7;color:#4b5e4f;font-size:15px;text-align:left;line-height:1.5}
.gd-option:hover:not(:disabled){border-color:#8cab87;transform:translateY(-1px)}
.gd-option:disabled{cursor:default;opacity:1}
.gd-option.correct{border-color:#72a278;background:#dff0dc;color:#2f6740}
.gd-option.wrong{border-color:#d9a27e;background:#fff0e4;color:#915e43}
.gd-fb{margin:12px 0 0;font-size:14px;line-height:1.7;color:var(--muted)}
.gd-fb.good{color:#2f6740;font-weight:600}
.gd-fb.bad{color:#b06a45;font-weight:600}
.gd-actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:16px}
.gd-primary{background:var(--green);color:#fffdf6;padding:11px 20px;border-radius:11px;min-height:44px;font-size:14px;font-weight:600}
.gd-nav-next{margin-top:18px}
.gd-quiet{padding:10px 16px;border:1px solid var(--line);border-radius:10px;background:#eef2e7;color:var(--green);font-size:14px}
.gd-check{padding:18px;border:1px solid #dfe4d6;border-radius:14px;background:linear-gradient(135deg,#f8f6e9,#edf3e8)}
.gd-check strong{display:block;color:var(--green);font-size:18px;margin-bottom:6px}
.gd-check p{margin:0 0 14px;color:#5b6d5e;line-height:1.7}
.gd-taskline{margin:14px 0 0;color:#8a7b4f;font-size:13px}
.assist-panel{margin-top:16px;padding:22px 24px;border:1px solid #e2d7bb;border-radius:18px;background:linear-gradient(135deg,#fff8df,#eef4e8)}
.as-buttons{display:flex;flex-wrap:wrap;gap:10px;margin:4px 0 16px}
.as-out{min-height:56px;padding:16px;border:1px solid #e4dcc4;border-radius:13px;background:#fffdf7}
.as-text{margin:0;font-size:16px;line-height:1.8;color:#3f5245;white-space:pre-line}
@media(max-width:720px){
  .gd-hero{grid-template-columns:92px minmax(0,1fr);gap:12px;padding:14px}
  .gd-art{height:128px}
  .gd-bubble{font-size:15px;padding:11px 12px}
  .gd-panel,.assist-panel{padding:17px 15px}
  .gd-options{grid-template-columns:1fr}
  .gd-q{font-size:16px}
}
#mic-button.recording{background:var(--accent,#c0392b);color:#fff;border-color:transparent;}
#mic-button.recording::before{content:"● ";}
#asr-hint{display:block;margin-top:6px;}
.persona-row{display:flex;gap:9px;flex-wrap:wrap;margin-top:12px}
.persona-chip{border:1px solid var(--line);background:#fbfcf7;border-radius:20px;padding:8px 16px;font-size:14px}
.persona-chip.active,.persona-chip[aria-pressed=true]{background:var(--green);color:#fffdf6;border-color:var(--green)}
.tricky-section{margin-top:20px}
.tricky-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(160px,1fr));gap:12px;margin-top:12px}
.tricky-card{background:#fffaf0;border:1px solid #eadfc3;border-radius:14px;padding:16px 14px;text-align:center}
.tricky-card .tw{font-size:24px;font-weight:700;letter-spacing:2px}
.tricky-card .py{font-size:13px;color:var(--coral);margin-top:6px;letter-spacing:1px}
.tricky-card .tip{font-size:12px;color:var(--muted);margin-top:8px;line-height:1.6}
.tricky-card button{margin-top:10px;font-size:12px;background:#ffffff90;border-radius:8px;padding:7px 12px;border:1px solid var(--line)}
:root{--dialogue-shadow:rgba(63,84,57,.06)}
.picture-dialogue{margin-top:18px;padding:22px;border:1px solid #e2d7bb;border-radius:20px;background:linear-gradient(135deg,#fff8df 0%,#eef4e8 100%);box-shadow:0 8px 22px var(--dialogue-shadow)}
.dialogue-heading{display:flex;align-items:flex-start;justify-content:space-between;gap:14px}.dialogue-heading h2{margin:5px 0 4px;color:var(--green);font-size:22px}.dialogue-heading p{margin:0;color:var(--muted);font-size:14px}.dialogue-badge{padding:7px 10px;border-radius:999px;background:#fffdf4;color:#927041;font-size:11px;white-space:nowrap;border:1px solid #ead6a6}
.dialogue-visual{display:block;margin-top:18px}.dialogue-scene{margin:0;overflow:hidden;border:1px solid #ded4b8;border-radius:18px;background:#fffdf5;box-shadow:0 5px 16px rgba(63,84,57,.07)}.dialogue-scene-image{display:block;width:100%;height:auto;aspect-ratio:5/2;object-fit:contain}.dialogue-scene-fallback{display:grid;place-items:center;min-height:180px}.dialogue-mascot{display:flex;flex-direction:column;align-items:center;gap:5px;color:var(--green);font-size:12px;font-weight:700}.dialogue-mascot img{width:64px;height:64px;object-fit:cover;object-position:50% 12%;border-radius:20px;background:#f0e6c9;border:1px solid #d8d8c1}.dialogue-picture{min-height:96px;display:grid;place-items:center;border-radius:18px;background:#fffdf5;border:1px solid #eadfbe;font-size:58px;letter-spacing:4px}.dialogue-question{margin:16px 2px 0;font-size:20px;line-height:1.55;font-weight:700;color:#475c4c}.dialogue-bubble{margin-top:15px;padding:12px 15px;border-radius:13px;background:#ffffffbf;border:1px solid #e4dcc4;color:#49624f;font-size:15px;line-height:1.7}.dialogue-choices{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;margin-top:13px}.dialogue-choice{display:flex;align-items:center;gap:9px;justify-content:center;min-height:58px;padding:9px 10px;border:1px solid #d8d9c5;border-radius:13px;background:#fffdf7;color:#4b5e4f;font-size:15px}.dialogue-choice:hover{border-color:#8cab87;transform:translateY(-1px)}.dialogue-choice:disabled{cursor:default;opacity:1}.dialogue-choice.correct{border-color:#72a278;background:#dff0dc;color:#2f6740}.dialogue-choice.wrong{border-color:#d9a27e;background:#fff0e4;color:#915e43}.choice-emoji{font-size:24px}.dialogue-actions{display:flex;align-items:center;gap:8px;flex-wrap:wrap;margin-top:12px}.dialogue-actions .dark-button{min-height:42px;padding:10px 15px;font-size:13px}.dialogue-actions .quiet-button{padding:9px 11px;font-size:13px;background:#ffffff88}.dialogue-feedback{min-height:26px;margin:9px 0 0;color:var(--green);font-size:14px;font-weight:600}.dialogue-feedback:empty{display:none}body.preschool .dialogue-question{font-size:23px}body.preschool .dialogue-choice{font-size:18px;min-height:68px}body.preschool .dialogue-bubble{font-size:18px}
@media(max-width:720px){.dialogue-heading{display:block}.dialogue-badge{display:inline-block;margin-top:9px}.picture-dialogue{padding:17px}.dialogue-visual{margin-top:15px}.dialogue-scene{border-radius:14px}.dialogue-picture{min-height:120px;font-size:44px}.dialogue-question{margin-top:13px;font-size:18px}.dialogue-choices{grid-template-columns:1fr}.dialogue-choice{justify-content:flex-start;padding-left:18px}.dialogue-actions{display:grid;grid-template-columns:1fr 1fr}.dialogue-actions .dark-button{grid-column:1 / -1;width:100%}}
.role-demo{display:grid;grid-template-columns:minmax(0,1.2fr) 250px;gap:18px;align-items:center;margin-top:18px;padding:20px 22px;border:1px solid #e2d7bb;border-radius:20px;background:linear-gradient(135deg,#f4ead1,#e8f0e5);overflow:hidden}
.role-demo-copy h2{margin:5px 0 6px;color:var(--green);font-size:22px}
.role-demo-copy p{font-size:14px;color:var(--muted);margin:0;line-height:1.7}
.role-demo-actions{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}
.role-demo-actions .quiet-button{padding:9px 12px;font-size:13px;background:#ffffff99}
.role-demo-actions .dark-button{padding:9px 14px;font-size:13px;min-height:40px}
.role-demo-status{display:block;margin-top:9px;color:var(--green);font-size:12px}
.role-demo-stage{position:relative;min-height:210px;display:grid;place-items:end center;background:transparent;border:0}
.role-demo-stage img{position:relative;z-index:2;width:190px;height:210px;object-fit:contain;object-position:center bottom;transform-origin:center bottom}
.role-demo-sparkles{position:absolute;z-index:3;top:17px;right:23px;color:#d09b4a;opacity:0;font-size:18px;letter-spacing:5px}
.role-demo-idle img{animation:roleDemoBreathe 2.6s cubic-bezier(.77,0,.175,1) infinite}
.role-demo-speaking img{animation:roleDemoSpeak .44s cubic-bezier(.23,1,.32,1) infinite alternate}
.role-demo-correct img{animation:roleDemoCorrect .68s cubic-bezier(.23,1,.32,1) 2}
.role-demo-correct .role-demo-sparkles{opacity:1;animation:roleDemoSparkle .7s cubic-bezier(.77,0,.175,1) 2}
.role-demo-speaking .role-demo-sparkles{opacity:.65;animation:roleDemoSparkle 1s cubic-bezier(.77,0,.175,1) infinite}
@keyframes roleDemoBreathe{0%,100%{transform:translate3d(0,0,0) rotate(-1deg) scale(1)}50%{transform:translate3d(0,-12px,0) rotate(1.5deg) scale(1.025)}}
@keyframes roleDemoSpeak{0%{transform:translate3d(-2px,0,0) rotate(-2deg) scale(1)}100%{transform:translate3d(3px,-7px,0) rotate(2deg) scale(1.035)}}
@keyframes roleDemoCorrect{0%,100%{transform:translate3d(0,0,0) rotate(0) scale(1)}35%{transform:translate3d(-3px,-20px,0) rotate(-4deg) scale(1.04)}70%{transform:translate3d(3px,-8px,0) rotate(4deg) scale(1.02)}}
@keyframes roleDemoSparkle{0%,100%{transform:scale(.8) rotate(-8deg);opacity:.35}50%{transform:scale(1.18) rotate(8deg);opacity:1}}
/* The character cutout sits directly on the page, without a portrait card. */
.floating-role{position:fixed;left:14px;right:auto;bottom:16px;z-index:30;width:320px;max-width:calc(100vw - 28px);height:440px;height:min(440px,calc(100dvh - 160px));display:flex;align-items:center;justify-content:flex-end;flex-direction:column;gap:8px;padding:0 0 42px;background:transparent;border:0;border-radius:0;box-shadow:none;isolation:isolate;transition:transform .2s cubic-bezier(.23,1,.32,1);pointer-events:none}
.floating-role:hover{filter:none}
.floating-role:focus-visible{outline:3px solid var(--gold);outline-offset:5px;border-radius:24px}
.floating-role-avatar{position:relative;display:grid;place-items:end center;width:300px;max-width:100%;height:100%;min-height:0;overflow:visible;background:transparent;border:0;border-radius:0;box-shadow:none;pointer-events:auto}
.floating-role-avatar img{display:block;width:100%;height:100%;min-height:0;object-fit:contain;object-position:center bottom;transform-origin:center bottom;animation:floatingRoleIdle 2.9s cubic-bezier(.77,0,.175,1) infinite}
.floating-role-label{position:absolute;left:50%;bottom:2px;transform:translateX(-50%);width:max-content;max-width:100%;padding:10px 18px;border-radius:999px;background:var(--green);color:#fffdf6;font-size:14px;line-height:1.4;white-space:nowrap;pointer-events:auto}
.floating-role-bubble{position:absolute;left:10px;top:-4px;z-index:3;max-width:calc(100% - 20px);padding:10px 14px;border-radius:14px 14px 14px 3px;background:#fffdf7;color:var(--green);border:1px solid #ded8c4;font-size:14px;line-height:1.5;white-space:normal;opacity:0;transform:translateY(5px);pointer-events:none;transition:opacity .2s cubic-bezier(.23,1,.32,1),transform .2s cubic-bezier(.23,1,.32,1)}
.floating-role:focus-visible .floating-role-bubble,.floating-role[data-motion="speaking"] .floating-role-bubble,.floating-role[data-motion="correct"] .floating-role-bubble{opacity:1;transform:translateY(0)}
.floating-role[data-motion="idle"] .floating-role-avatar img{animation:floatingRoleIdle 2.9s cubic-bezier(.77,0,.175,1) infinite}
.floating-role[data-motion="speaking"] .floating-role-avatar img{animation:floatingRoleSpeaking .42s cubic-bezier(.23,1,.32,1) infinite alternate}
.floating-role[data-motion="correct"] .floating-role-avatar img{animation:floatingRoleCorrect .68s cubic-bezier(.23,1,.32,1) 2}
.floating-role[data-motion="speaking"] .floating-role-label{background:#3b7b60}
.floating-role[data-motion="correct"] .floating-role-label{background:#bf784f}
@keyframes floatingRoleIdle{0%,100%{transform:translate3d(0,0,0) rotate(-1deg) scale(1)}50%{transform:translate3d(0,-11px,0) rotate(1.5deg) scale(1.018)}}
@keyframes floatingRoleSpeaking{0%{transform:translate3d(-3px,0,0) rotate(-2deg) scale(1)}50%{transform:translate3d(2px,-7px,0) rotate(2.5deg) scale(1.035)}100%{transform:translate3d(4px,-2px,0) rotate(-1deg) scale(1.012)}}
@keyframes floatingRoleCorrect{0%,100%{transform:translate3d(0,0,0) rotate(0) scale(1)}35%{transform:translate3d(-3px,-22px,0) rotate(-4deg) scale(1.04)}70%{transform:translate3d(3px,-8px,0) rotate(4deg) scale(1.02)}}
.ask-heading{display:flex;align-items:center;gap:16px;margin-bottom:10px}
.ask-persona-avatar{display:block;flex:0 0 72px;width:72px;height:84px;object-fit:contain;object-position:center bottom;background:transparent;border:0}
.ask-heading>div{flex:1;min-width:0}
.ask-heading h2{margin:0 0 4px;line-height:1.4}
.ask-persona-title{display:block;color:var(--muted);font-size:12px;line-height:1.6}
.ask-card{background:linear-gradient(145deg,#fffef9 0%,#ffffff 72%);border-color:#dce5d8}
.ask-card>.small-label{color:var(--coral);letter-spacing:1.5px}
.ask-heading{margin-top:12px}
.ask-card .persona-row{gap:8px;margin-top:16px}
.ask-card .persona-chip{min-height:44px;padding:10px 16px;line-height:1.5}
.ask-card .question-chips{gap:8px;margin:16px 0 6px}
.ask-card .question-chips button{min-height:40px;white-space:normal;text-align:left;line-height:1.6}
.ask-card #question-input{min-height:130px;background:#fcfdf8;border-color:#ceddca}
.ask-card #question-input:focus{background:white;border-color:var(--green)}
.ask-card .ask-actions{flex-wrap:wrap;gap:10px}
.ask-card .ask-actions>button{min-height:44px}
.ask-card #connection-status{flex:1 1 160px;line-height:1.6}
.ask-card #ask-stop-speech{color:var(--green);background:var(--mint)}
@media(hover:hover) and (pointer:fine){
  .floating-role:hover{transform:translateY(-5px)}
  .floating-role:hover .floating-role-bubble{opacity:1;transform:translateY(0)}
}
@media(min-width:721px) and (max-height:640px){
  .floating-role{width:260px;height:min(340px,calc(100dvh - 140px))}
  .floating-role-avatar{width:240px}
}
@media(max-width:720px){
  .role-demo{grid-template-columns:1fr;padding:17px}
  .role-demo-stage{min-height:215px;order:-1}
  .role-demo-stage img{width:190px;height:210px}
  .role-demo-actions{display:grid;grid-template-columns:1fr 1fr}
  .role-demo-actions .dark-button{grid-column:1 / -1;width:100%}
  .floating-role{left:12px;bottom:max(14px,env(safe-area-inset-bottom));width:120px;height:180px;height:min(180px,calc(100dvh - 120px));padding:0 0 40px}
  .floating-role-avatar{width:116px}
  .floating-role-label{bottom:0;max-width:100%;padding:7px 10px;font-size:11px;white-space:normal}
  .floating-role-bubble{left:2px;top:auto;bottom:calc(100% - 3px);max-width:calc(100vw - 30px);width:160px;font-size:12px}
  .ask-heading{gap:12px}
  .ask-persona-avatar{flex-basis:60px;width:60px;height:72px}
  .ask-card #connection-status{flex-basis:100%;order:2}
  .ask-card #ask-submit{margin-left:auto}
}
@media(prefers-reduced-motion:reduce){
  .floating-role-avatar img,.role-demo-stage img,.role-demo-sparkles{animation:none!important}
  .floating-role,.floating-role-bubble{transition:none!important}
}
/* ===== 假期学习地图（三件套） ===== */
.journey-entry-card{margin-top:18px;padding:16px;border:1px solid #e0d9c2;border-radius:16px;background:linear-gradient(135deg,#f6efd8,#eaf1e6)}
.journey-entry-card strong{display:block;color:var(--green);margin:8px 0 4px;font-size:15px}
.journey-entry-card p{margin:0 0 12px;color:var(--muted);font-size:12px;line-height:1.6}
.journey-entry-icon{font-size:20px}
.journey-entry-card button{width:100%;background:var(--green);color:#fffdf6;border-radius:10px;padding:11px;min-height:44px;font-size:14px;font-weight:600}
.journey-entry-card button span{margin-left:8px}
body.journey-mode .course-heading,body.journey-mode .daily-card,body.journey-mode #interest-topic,body.journey-mode .stage-tabs,body.journey-mode .stage-panel,body.journey-mode #homework-panel{display:none!important}
.journey-panel{margin-top:18px;padding:28px;border:1px solid var(--line);border-radius:24px;background:#fffdf6}
.journey-heading{display:flex;justify-content:space-between;gap:18px;align-items:flex-start}
.journey-heading h1{margin:6px 0 8px}
.journey-heading p{margin:0;color:var(--muted);line-height:1.7}
.journey-heading-actions{flex:0 0 auto}
.journey-tabs{display:flex;gap:8px;flex-wrap:wrap;margin:20px 0;padding:5px;border-radius:14px;background:var(--mint)}
.journey-tabs button{border:0;background:transparent;border-radius:10px;padding:11px 16px;font-size:15px;color:var(--muted);cursor:pointer}
.journey-tabs button.active{background:var(--green);color:#fffdf6}
.journey-tab-panel{margin-top:16px}
.journey-progress{margin:0 0 14px;padding:11px 14px;border-radius:11px;background:#f3efe0;color:#5c6b56;font-size:14px;font-weight:600}
/* 文化线关卡 */
.culture-levels{display:grid;gap:16px}
.journey-level{padding:18px;border:1px solid #e0d9c2;border-radius:16px;background:#fffdf7}
.journey-level.locked{opacity:.62;background:#f3f1e8}
.journey-level-head{display:flex;align-items:center;gap:12px;flex-wrap:wrap}
.journey-level-num{display:grid;place-items:center;width:34px;height:34px;border-radius:11px;background:var(--green);color:#fff6d9;font-weight:700;font-size:16px;flex:0 0 auto}
.journey-level-head h3{margin:0;font-size:19px;color:var(--ink)}
.journey-level-head small{margin-left:auto;color:var(--muted);font-size:12px}
.journey-level-state{padding:5px 10px;border-radius:999px;background:#edf1e6;color:var(--green);font-size:12px;font-weight:600}
.journey-level.locked .journey-level-state{background:#e8e4d6;color:#8a8574}
.journey-persona{margin:12px 0 6px;padding:10px 13px;border-left:4px solid var(--gold);border-radius:8px;background:#f6f0de;color:#5c6b56;font-size:14px;line-height:1.7}
.journey-locked-hint{margin:10px 0 0;color:var(--muted);font-size:14px}
.journey-teaching{margin:10px 0 14px}
.journey-teaching-row{display:flex;gap:10px;align-items:flex-start;margin:7px 0}
.journey-teaching-type{flex:0 0 auto;padding:3px 8px;border-radius:6px;background:#eef2e7;color:var(--green);font-size:11px;white-space:nowrap}
.journey-teaching-row p{margin:0;font-size:15px;line-height:1.7;color:#3f5245}
.journey-parallel{margin:12px 0;padding:12px 14px;border:1px dashed #cfc9ae;border-radius:12px;background:#fbf9ef}
.journey-parallel-label{margin:0 0 8px;color:#8a7b4f;font-size:12px;font-weight:600}
/* 选择题 */
.journey-quiz{margin:10px 0}
.journey-question{margin:0 0 10px;font-size:16px;font-weight:600;color:var(--ink);line-height:1.6}
.journey-options{display:grid;gap:8px}
.journey-option{text-align:left;padding:11px 14px;border:1px solid #d8d9c5;border-radius:11px;background:#fffdf7;color:#4b5e4f;font-size:15px;line-height:1.5}
.journey-option:hover:not(:disabled){border-color:#8cab87;transform:translateY(-1px)}
.journey-option:disabled{cursor:default;opacity:1}
.journey-option.correct{border-color:#72a278;background:#dff0dc;color:#2f6740}
.journey-option.wrong{border-color:#d9a27e;background:#fff0e4;color:#915e43}
.journey-feedback{margin:10px 0 6px;font-size:14px;line-height:1.7;color:var(--muted)}
.journey-feedback:empty{display:none}
.journey-feedback.good{color:#2f6740;font-weight:600}
.journey-feedback.bad{color:#b06a45;font-weight:600}
.journey-feedback.hint{color:#8a7b4f}
.journey-quiz-actions{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-top:6px}
.journey-quiz-actions .quiet-button{padding:7px 12px;font-size:13px;background:#eef2e7;color:var(--green)}
.journey-status{color:var(--muted);font-size:12px}
/* 语文线 */
.chinese-grade-tabs{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:14px}
.journey-grade{padding:9px 14px;border:1px solid var(--line);border-radius:999px;background:#fbfcf7;color:var(--muted);font-size:14px;cursor:pointer}
.journey-grade.active{background:var(--green);color:#fffdf6;border-color:var(--green)}
.journey-grade-focus{margin:0 0 14px;color:var(--muted);font-size:14px}
.chinese-items{display:grid;gap:12px}
.journey-chinese-group{margin-bottom:6px}
.journey-chinese-type{margin:6px 0 10px;color:var(--green);font-size:15px;padding-bottom:6px;border-bottom:1px solid var(--line)}
.journey-item{padding:14px;border:1px solid var(--line);border-radius:13px;background:#fffdf7;margin-bottom:10px}
.journey-item.mastered{border-color:#a9c6a9;background:#f0f7ee}
.journey-item-head{display:flex;align-items:center;gap:8px;flex-wrap:wrap;margin-bottom:4px}
.journey-kind{padding:3px 9px;border-radius:999px;font-size:11px;font-weight:600}
.journey-kind-new{background:#e7efe4;color:var(--green)}
.journey-kind-review{background:#f7ecd8;color:#9a762f}
.journey-kind-preview{background:#e6edf4;color:#3f6280}
.journey-knowledge{color:var(--muted);font-size:13px}
.journey-mastered-badge{margin-left:auto;padding:3px 9px;border-radius:999px;background:var(--green);color:#fffdf6;font-size:11px}
/* 每日卡 */
.daily-cards{display:grid;gap:14px}
.journey-daily-card{padding:16px 18px;border:1px solid #e0d9c2;border-radius:15px;background:#fffdf7}
.journey-daily-card.done{border-color:#a9c6a9;background:#f2f8ef}
.journey-daily-head{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.journey-daily-day{flex:0 0 auto;padding:4px 10px;border-radius:8px;background:var(--gold);color:#5a4317;font-size:12px;font-weight:700}
.journey-daily-head h4{margin:0;font-size:17px;color:var(--ink)}
.journey-daily-state{margin-left:auto;color:var(--green);font-size:13px;font-weight:600}
.journey-daily-knowledge{display:inline-block;margin:8px 0 4px;padding:3px 9px;border-radius:6px;background:#eef2e7;color:var(--green);font-size:12px}
.journey-daily-teaching{margin:6px 0;color:#3f5245;font-size:15px;line-height:1.7}
.journey-daily-task{margin-top:12px;padding:12px 14px;border-radius:11px;background:#f6f0de}
.journey-daily-task strong{color:#9a762f;font-size:13px}
.journey-daily-task p{margin:6px 0 0;color:#5c6b56;font-size:14px;line-height:1.6}
.journey-link-status{margin:6px 0 0;padding:9px 13px;border-radius:10px;font-size:13px;line-height:1.55;font-weight:600}
.journey-link-status.linked{background:#e7f3e7;color:#2f6a48;border:1px solid #bcd9bc}
.journey-link-status.unlinked{background:#fbf1dc;color:#8a6a2a;border:1px solid #ecd9a8}
/* 数学线 / 科学线：年级、假期与教材衔接 */
#journey-math{--subject-accent:#496f91;--subject-soft:#edf4f8;--subject-border:#cbdce7}
#journey-science{--subject-accent:#3c766a;--subject-soft:#edf5f0;--subject-border:#c8ddd3}
.subject-grade-tabs{margin-bottom:10px}
.subject-holiday-tabs{display:flex;gap:10px;flex-wrap:wrap;margin:0 0 14px}
.subject-holiday{min-height:44px;padding:10px 18px;border:1px solid var(--subject-border);border-radius:12px;background:#fffdf7;color:var(--subject-accent);font-size:14px;font-weight:600;cursor:pointer}
.subject-holiday.active{background:var(--subject-accent);border-color:var(--subject-accent);color:#fff}
#journey-math .journey-grade.active,#journey-science .journey-grade.active{background:var(--subject-accent);border-color:var(--subject-accent)}
.subject-items{grid-template-columns:repeat(2,minmax(0,1fr));align-items:start;gap:14px}
.subject-intro{grid-column:1/-1;display:flex;align-items:center;gap:16px;padding:18px 20px;border:1px solid var(--subject-border);border-radius:16px;background:var(--subject-soft)}
.subject-intro-icon{display:grid;place-items:center;flex:0 0 auto;width:54px;height:54px;border-radius:16px;background:var(--subject-accent);color:#fff;font-size:29px;font-weight:700}
.subject-intro h3{margin:4px 0 6px;color:var(--subject-accent);font-size:20px}
.subject-intro p{margin:0;color:#52665e;font-size:14px;line-height:1.75}
.subject-unit{margin-bottom:0;border-top:3px solid var(--subject-accent)}
.subject-volume{padding:3px 8px;border-radius:7px;background:var(--subject-soft);color:var(--subject-accent);font-size:12px;font-weight:600}
.subject-unit-title{margin:9px 0 6px;color:var(--subject-accent);font-size:19px}
.subject-teaching{margin:0 0 12px;color:#4d5f55;font-size:14px;line-height:1.8}
.subject-task{background:var(--subject-soft)}
.subject-task strong{color:var(--subject-accent)}
.subject-version-note{grid-column:1/-1;margin:2px 0 0;padding:12px 14px;border-left:4px solid var(--subject-border);color:#6c766f;font-size:12px;line-height:1.7}
.learner-report-card{margin-top:10px;padding:14px 16px;border:1px solid var(--line,rgba(0,0,0,.12));border-radius:14px;background:#fffdf6}
.learner-report-title{margin:0 0 2px;font-size:15px;font-weight:700;color:#3a3326}
.learner-report-code{margin:0 0 10px;font-size:12.5px;color:#8a6a2a}
.learner-report-grid{display:grid;grid-template-columns:auto 1fr;gap:6px 16px;margin:0}
.learner-report-grid dt{color:#6b6b6b;font-size:13px}
.learner-report-grid dd{margin:0;font-size:13px;font-weight:600;color:#3a3326;text-align:right}
.learner-form{display:flex;flex-wrap:wrap;gap:10px;align-items:flex-end;margin:12px 0}
.learner-form label{display:flex;flex-direction:column;gap:5px;color:var(--muted);font-size:13px;margin:0}
.learner-form input{width:auto;min-width:120px;margin:0;border:1px solid var(--line);border-radius:10px;padding:9px 10px;background:#fffdf5;font:inherit;box-sizing:border-box}
.learner-form .quiet-button{margin:0}
@media(max-width:720px){.learner-form{display:block}.learner-form label{margin:8px 0}.learner-form input{width:100%}.learner-form .quiet-button{width:100%;margin-top:6px}}
@media(max-width:720px){
  .journey-panel{margin:14px;padding:18px;border-radius:18px}
  .journey-heading{display:block}
  .journey-heading-actions{margin-top:14px}
  .journey-tabs button{flex:1 1 30%;min-width:110px;padding:10px 8px;font-size:13px}
  .subject-items{grid-template-columns:1fr}
  .subject-intro{align-items:flex-start;padding:15px}
  .subject-intro-icon{width:44px;height:44px;border-radius:13px;font-size:24px}
  .subject-holiday{flex:1;padding:10px 12px}
  .journey-level{padding:14px}
  .journey-level-head small{margin-left:0}
  .journey-option{font-size:14px}
  .journey-item{padding:12px}
  .journey-daily-card{padding:14px}
}