:root{--red:#b52218;--deep:#7f1010;--gold:#d6a548;--pale:#f1d99a;--paper:#fff9ee;--ink:#30241f;--muted:#7a6e67;--line:#e5d4b0;--white:#fffdf8;--shadow:0 18px 50px rgba(84,35,20,.12)}
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rgba(255,255,255,.38);border-radius:10px}.mode-switch button{border:0;padding:8px 16px;color:#fff;background:transparent;border-radius:7px}.mode-switch button.active{background:var(--gold);color:var(--deep);font-weight:700}.progress-nav{min-height:68px;display:flex;align-items:center;justify-content:center;gap:0;padding:10px 24px;background:#fff;border-bottom:1px solid var(--line);position:sticky;top:76px;z-index:20;overflow:auto}.step{display:flex;align-items:center;flex:none;color:#998b7f;border:0;background:none;padding:4px}.step:not(:last-child):after{content:"";display:block;width:clamp(16px,3vw,55px);height:1px;background:#d9c9a9;margin:0 8px}.step b{display:grid;place-items:center;width:26px;height:26px;border-radius:50%;border:1px solid #cdbb99;margin-right:7px;font-size:.8rem}.step.current{color:var(--red);font-weight:700}.step.current b{background:var(--red);border-color:var(--red);color:#fff}.step.done{color:#83621d}.step.done 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.scanner:after{content:"";position:absolute;width:150%;height:2px;background:linear-gradient(90deg,transparent,var(--gold),transparent);animation:scan 1.05s linear infinite}@keyframes scan{from{transform:translateY(-72px)}to{transform:translateY(72px)}}.identity-card{display:grid;grid-template-columns:180px 1fr;gap:28px;padding:28px;margin-top:24px;border-top:5px solid var(--gold)}.portrait{min-height:210px;border-radius:12px;display:grid;place-items:center;background:linear-gradient(150deg,var(--deep),var(--red));color:var(--pale)}.portrait svg{width:82px;fill:currentColor}.identity-meta{display:grid;grid-template-columns:1fr 1fr;gap:14px}.meta-block{border-bottom:1px solid var(--line);padding:8px 0}.meta-block small{display:block;color:var(--muted);margin-bottom:4px}.video-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin:22px 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var(--line)}.compose textarea{min-height:70px;width:100%;border:1px solid #d2c4ad;border-radius:8px;padding:10px}.compose-actions{display:flex;gap:8px;margin-top:8px}.recording{color:var(--red);font-weight:700}.wave{display:inline-flex;align-items:center;gap:2px;margin-right:7px}.wave i{width:3px;background:var(--red);animation:wave .55s ease-in-out infinite alternate}.wave i:nth-child(2){animation-delay:.12s}.wave i:nth-child(3){animation-delay:.22s}@keyframes wave{from{height:6px}to{height:18px}}.sandbox{min-height:520px;padding:22px;position:relative;overflow:hidden;background:#f4e5c3}.map-svg{width:100%;height:390px}.map-svg text{font-size:14px;fill:#5d3a27;font-weight:700}.route{fill:none;stroke:var(--red);stroke-width:6;stroke-dasharray:10 8;stroke-dashoffset:180;transition:stroke-dashoffset 1s}.sandbox.running .route{animation:route 6s linear forwards}@keyframes 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strong{display:block;font-size:1.65rem;color:var(--deep);margin-top:5px}.line-panel{padding:18px;margin-top:14px}.line-chart{width:100%;height:280px;overflow:visible}.chart-line{fill:none;stroke-width:3}.chart-dot{stroke:#fff;stroke-width:2}.chart-legend{display:flex;gap:13px;flex-wrap:wrap;font-size:.8rem}.legend-dot{width:9px;height:9px;border-radius:50%;display:inline-block;margin-right:5px}.keyword-picks{display:flex;flex-wrap:wrap;gap:9px}.keyword-picks button{border:1px solid #cbb990;background:#fff;border-radius:99px;padding:8px 12px;color:var(--ink)}.keyword-picks button.active{background:var(--red);border-color:var(--red);color:#fff}.word-cloud{position:relative;height:250px;border:1px solid var(--line);border-radius:14px;background:#fffaf0;overflow:hidden;margin-top:16px}.cloud-word{position:absolute;color:var(--red);white-space:nowrap}.cloud-word:nth-child(2n){color:#8b6518}.db-card{max-width:860px;margin:40px auto;padding:42px;text-align:center;border:2px solid var(--gold);background:linear-gradient(#fffdf9,#fff6df);position:relative}.db-icon{width:86px;margin:auto;stroke:var(--gold);fill:none;stroke-width:1.7}.db-card h2{font-family:KaiTi,serif;font-size:2rem;color:var(--deep)}.capabilities{display:flex;justify-content:center;gap:9px;flex-wrap:wrap;margin:22px}.capabilities span{padding:7px 11px;border:1px solid var(--line);border-radius:99px;background:#fff}.completion{text-align:center;max-width:900px;margin:auto}.completion .ring{width:150px;height:150px;margin:15px auto;border-radius:50%;display:grid;place-items:center;background:conic-gradient(var(--gold) 100%,#eee 0);position:relative}.completion .ring:after{content:"";position:absolute;inset:14px;background:var(--paper);border-radius:50%}.completion .ring strong{z-index:1;font-size:2rem;color:var(--deep)}.summary-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;text-align:left}.summary-grid .card{padding:18px}.teacher-hero{padding:32px;background:linear-gradient(120deg,var(--deep),var(--red));color:#fff;position:relative;overflow:hidden}.teacher-hero h1{font-family:KaiTi;font-size:2.4rem;margin:0}.teacher-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:15px;margin-top:22px}.teacher-stats .stat{padding:18px;background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.25);border-radius:12px}.stat strong{display:block;font-size:1.8rem;color:var(--pale);margin-top:5px}.console{display:grid;grid-template-columns:230px 1fr;gap:20px}.console-menu{padding:12px;height:max-content;position:sticky;top:164px}.console-menu button{width:100%;border:0;background:transparent;text-align:left;padding:12px;border-radius:8px;color:var(--ink)}.console-menu button.active{background:#f4dfad;color:var(--deep);font-weight:700}.console-main{min-width:0}.control-strip{padding:14px;display:flex;gap:8px;flex-wrap:wrap;margin-bottom:16px}.table-wrap{overflow:auto}.data-table{width:100%;border-collapse:collapse;background:#fff}.data-table th,.data-table td{padding:11px;border-bottom:1px solid #eadfc9;text-align:left;white-space:nowrap}.data-table th{color:var(--deep);background:#fff4db}.heatmap{display:grid;grid-template-columns:130px repeat(3,1fr);gap:5px;align-items:stretch;margin-top:18px}.heat-cell{padding:14px;text-align:center;border-radius:6px}.heat-head{font-weight:700;padding:10px}.panel{padding:22px;margin-bottom:16px}.toolbar{display:flex;gap:8px;flex-wrap:wrap;margin:12px 0}.screen-mode{position:fixed;inset:0;z-index:100;background:var(--paper);padding:40px;overflow:auto}.screen-mode h1{text-align:center;color:var(--deep);font-family:KaiTi;font-size:3rem}.screen-grid{max-width:1250px;margin:auto}.modal-shell{position:fixed;inset:0;background:rgba(34,18,14,.62);z-index:200;display:grid;place-items:center;padding:20px}.modal-shell[hidden]{display:none}.dialog{width:min(620px,100%);max-height:90vh;overflow:auto;background:var(--paper);border:2px solid var(--gold);border-radius:16px;padding:25px;box-shadow:var(--shadow)}.dialog h2{color:var(--deep);margin-top:0}.dialog-actions{display:flex;justify-content:flex-end;gap:10px;margin-top:22px}.toast{position:fixed;left:50%;bottom:30px;transform:translate(-50%,20px);padding:12px 18px;background:#38211a;color:#fff;border-left:4px solid var(--gold);border-radius:8px;opacity:0;pointer-events:none;z-index:300;transition:.25s}.toast.show{opacity:1;transform:translate(-50%,0)}.hidden{display:none!important}.muted{color:var(--muted)}.center{text-align:center}.divider{height:1px;background:var(--line);margin:22px 0}
@media(max-width:980px){.scene-grid,.decision-grid{grid-template-columns:1fr}.two-col{grid-template-columns:1fr}.dimension-grid{grid-template-columns:repeat(2,1fr)}.console{grid-template-columns:1fr}.console-menu{position:static;display:flex;overflow:auto}.console-menu button{min-width:150px}.teacher-stats,.summary-grid{grid-template-columns:repeat(2,1fr)}.progress-nav{justify-content:flex-start}.step span{display:none}.video-grid{grid-template-columns:1fr}.identity-card{grid-template-columns:1fr}.portrait{min-height:150px}}
@media(max-width:600px){.topbar{padding:0 12px}.brand small{display:none}.mode-switch button{padding:7px 9px}main{padding:24px 14px 50px}.teacher-stats,.summary-grid,.metrics{grid-template-columns:1fr}.identity-meta{grid-template-columns:1fr}.db-card{padding:24px}.heatmap{grid-template-columns:88px repeat(3,1fr);font-size:.75rem}.stage-visual{padding:20px;align-items:center;flex-direction:column;text-align:center}.subtitle{margin:16px 0 0}.bar-row{grid-template-columns:70px 1fr 38px}}

/* 遵义会议研讨：大视频主舞台 + 实时语音讨论流 */
.meeting-layout{display:grid;grid-template-columns:minmax(0,72fr) minmax(390px,28fr);gap:20px;align-items:stretch}
.meeting-stage{height:760px;min-height:760px;display:grid;grid-template-columns:1fr;grid-template-rows:auto minmax(0,1fr) auto;background:#38100d;isolation:isolate}
.meeting-stage:before{z-index:-1;background:linear-gradient(rgba(54,14,10,.05),rgba(30,8,6,.5)),repeating-linear-gradient(90deg,transparent 0 64px,rgba(214,165,72,.05) 65px)}
.speaker-tabs{position:relative;z-index:4;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:8px;padding:10px;background:linear-gradient(90deg,#8d0d09,#b51a12);border-bottom:2px solid var(--gold)}
.speaker-tab{min-width:0;display:flex;align-items:center;gap:9px;padding:10px 12px;border:1px solid rgba(255,225,162,.32);border-radius:9px;background:rgba(95,5,4,.32);color:#fff;text-align:left;transition:.18s}
.speaker-tab>span:first-child{width:32px;height:32px;display:grid;place-items:center;flex:none;border-radius:50%;background:rgba(255,255,255,.12)}
.speaker-tab svg{width:17px;height:17px;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
.speaker-tab strong,.speaker-tab small{display:block;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.speaker-tab strong{font-size:.91rem}.speaker-tab small{margin-top:3px;color:#f5dba6;font-size:.72rem}.speaker-tab.active{background:#fff5dc;color:var(--deep);border-color:var(--gold);box-shadow:0 4px 12px rgba(42,8,5,.2)}.speaker-tab.active small{color:#8a641f}.speaker-tab:hover{background:rgba(255,255,255,.16)}.speaker-tab.active:hover{background:#fff5dc}.speaker-tab:focus-visible{outline:3px solid #fff;outline-offset:2px}
.meeting-stage .stage-visual{grid-column:1;min-height:0;height:auto;padding:32px;align-items:flex-end;background-image:linear-gradient(180deg,rgba(46,13,9,.04) 35%,rgba(34,9,7,.62) 100%),url('../images/scene-zunyi.png');background-size:cover;background-position:center}
.meeting-stage .stage-visual video{z-index:1}.meeting-stage .stage-visual .speaker-avatar,.meeting-stage .stage-visual .subtitle{z-index:2}.meeting-stage .subtitle{max-width:760px}.meeting-stage .media-controls{grid-column:1;z-index:4;padding:14px 22px;background:#28100e}
.discussion{height:760px;min-height:760px;display:flex;flex-direction:column;overflow:hidden;border-top:6px solid var(--red)}
.discussion-title{min-height:84px;padding:16px 18px;display:flex;align-items:center;justify-content:space-between;gap:14px;border-bottom:1px solid var(--line);background:linear-gradient(100deg,#fff9e9,#fff2ce)}
.discussion-title h2{padding:0;margin:0;border:0;color:var(--deep);font-size:1.25rem}.discussion-title p{margin:5px 0 0;color:var(--muted);font-size:.78rem}.discussion-title>span{flex:none;padding:5px 10px;border-radius:99px;background:#f0d79b;color:#75520f;font-size:.78rem;font-weight:700}
.discussion .comments{flex:1;min-height:0;overflow-y:auto;padding:18px 14px;background:#fbf6eb;scrollbar-color:#bcae98 transparent;scrollbar-width:thin}
.chat-message{display:grid;grid-template-columns:46px minmax(0,1fr);gap:11px;align-items:start;margin:0 0 18px;padding:0;border:0;background:transparent;box-shadow:none}
.student-avatar{width:46px;height:46px;display:grid;place-items:center;border-radius:50%;border:2px solid #e0ae4b;background:linear-gradient(145deg,#a5140e,#cf3325);color:#fff8df;font-weight:700;font-size:.78rem;box-shadow:0 4px 10px rgba(115,27,16,.18)}
.chat-message:nth-child(3n+2) .student-avatar{background:linear-gradient(145deg,#80621f,#b8892f)}.chat-message:nth-child(3n) .student-avatar{background:linear-gradient(145deg,#6c3328,#a45a43)}
.message-body{min-width:0}.message-body .comment-head{margin:0 2px 6px;display:flex;justify-content:space-between;align-items:flex-start;gap:8px;color:var(--muted)}.message-body .comment-head span{min-width:0}.message-body .comment-head strong,.message-body .comment-head small{display:block}.message-body .comment-head strong{overflow:hidden;text-overflow:ellipsis;white-space:nowrap;color:#4c3328;font-size:.86rem}.message-body .comment-head small{margin-top:2px;font-size:.7rem}.message-body .comment-head time{flex:none;font-size:.7rem}
.text-bubble,.voice-transcript{position:relative;margin:0;padding:11px 13px;border:1px solid #ead3a6;border-radius:4px 14px 14px 14px;background:#fff;color:#3b2d27;line-height:1.62;box-shadow:0 3px 10px rgba(94,49,22,.05)}
.text-bubble:before{content:"";position:absolute;left:-7px;top:0;border-top:8px solid #fff;border-left:8px solid transparent;filter:drop-shadow(-1px -1px 0 #ead3a6)}
.voice-row{display:flex;align-items:center;gap:8px}.voice-message{min-width:176px;max-width:100%;height:48px;display:flex;align-items:center;gap:10px;padding:0 13px;border:1px solid #d2a44b;border-radius:4px 16px 16px 16px;background:linear-gradient(100deg,#fff4d8,#f8e0a7);color:var(--deep);box-shadow:0 3px 10px rgba(94,49,22,.07)}.voice-message>span{width:26px;height:26px;display:grid;place-items:center;border-radius:50%;background:var(--red);color:#fff}.voice-message svg{width:14px;height:14px;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}.voice-message em{margin-left:auto;font-style:normal;font-size:.72rem;color:#735d4f}
.voice-bars{height:24px;display:flex;align-items:center;gap:3px}.voice-bars b{width:3px;border-radius:3px;background:#a9251b}.voice-bars b:nth-child(1){height:8px}.voice-bars b:nth-child(2){height:16px}.voice-bars b:nth-child(3){height:12px}.voice-bars b:nth-child(4){height:21px}.voice-bars b:nth-child(5){height:14px}.voice-bars b:nth-child(6){height:7px}
.transcript-toggle{flex:none;padding:7px 2px;border:0;border-bottom:1px solid currentColor;background:transparent;color:var(--red);font-size:.74rem;font-weight:700}.transcript-toggle:hover{color:var(--deep)}.voice-transcript{margin-top:8px;border-left:3px solid var(--red);border-radius:4px 12px 12px 4px;background:#fffaf0;font-size:.84rem}
.discussion .compose{flex:none;padding:12px 15px 14px;background:#fffaf0;border-top:1px solid var(--line);box-shadow:0 -7px 20px rgba(86,45,20,.05)}.compose-head{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:8px}.compose-head strong,.compose-head label{color:var(--deep);font-weight:700}.compose-head small{max-width:55%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;color:var(--muted)}.compose-input-shell{position:relative}.discussion .compose textarea{display:block;width:100%;min-height:88px;resize:none;padding:11px 104px 40px 12px;border:1px solid #d9c6a3;border-radius:11px;background:#fff;color:var(--ink);outline:none;line-height:1.5}.discussion .compose textarea:focus{border-color:var(--red);box-shadow:0 0 0 3px rgba(181,26,18,.1)}.compose-actions{display:flex;gap:8px}.compose-input-shell .compose-actions{position:absolute;right:9px;bottom:9px;margin:0}.compose-actions .btn{flex:1;padding-inline:10px}.voice-input-btn svg{width:18px;height:18px;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}.compose-input-shell #recordState{position:absolute;left:12px;bottom:11px;max-width:calc(100% - 116px);pointer-events:none}.recording{margin:0;font-size:.76rem;color:var(--red)}.meeting-next{margin-top:20px}

@media(max-width:1100px){.meeting-layout{grid-template-columns:1fr}.meeting-stage{height:680px;min-height:680px}.discussion{height:650px;min-height:650px}.speaker-tabs{grid-template-columns:repeat(4,minmax(160px,1fr));overflow-x:auto}}
@media(max-width:680px){.meeting-stage{height:610px;min-height:610px}.speaker-tabs{display:flex}.speaker-tab{min-width:174px}.meeting-stage .stage-visual{padding:20px;align-items:center;justify-content:flex-end;flex-direction:column;text-align:center}.meeting-stage .subtitle{margin:15px 0 0}.meeting-stage .media-controls{padding:12px}.discussion{height:660px;min-height:660px}.chat-message{grid-template-columns:40px minmax(0,1fr)}.student-avatar{width:40px;height:40px}.voice-message{min-width:148px}.discussion .compose{padding:12px}}
.icon-btn svg,.step b svg,.watched-mark svg{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}.step b svg,.watched-mark svg{width:15px;height:15px}.watched-mark{display:flex;align-items:center;gap:4px}
.scene-art{background:#7f1010}.scene-art img{display:block;width:100%;height:100%;object-fit:cover;object-position:center;filter:saturate(.88) contrast(1.03);transition:transform .55s ease,filter .3s ease}.scene-art:after{inset:0;left:0;right:0;bottom:0;height:auto;background:linear-gradient(180deg,rgba(66,15,11,.02) 40%,rgba(78,17,12,.46) 100%);clip-path:none;opacity:1;pointer-events:none}.scene-card:hover .scene-art img{transform:scale(1.035);filter:saturate(1) contrast(1.04)}

/* 党史课堂视觉系统：依据用户提供的课程参考页进行项目化适配 */
:root{--red:#b51a12;--deep:#7a0c0a;--gold:#dca746;--pale:#f8dda1;--paper:#fff9eb;--ink:#2b211d;--muted:#75685e;--line:#dfbd78;--white:#fffdf7;--shadow:0 14px 34px rgba(95,38,18,.1);--soft-red:#fff0e7;--brown:#352017}
body{background-color:var(--paper);background-image:radial-gradient(circle at 86% 9%,rgba(220,167,70,.13) 0 3px,transparent 4px),radial-gradient(circle at 79% 14%,rgba(181,26,18,.035),transparent 24%),linear-gradient(90deg,rgba(255,255,255,.72),rgba(255,249,235,.86));background-attachment:fixed}
body:before{content:"";position:fixed;inset:0;z-index:-1;pointer-events:none;background:linear-gradient(135deg,transparent 0 73%,rgba(181,26,18,.025) 73% 74%,transparent 74%),radial-gradient(circle at 8% 82%,rgba(220,167,70,.06),transparent 23%)}
.topbar{height:82px;padding-inline:clamp(22px,4vw,72px);background:linear-gradient(105deg,#8d0c08 0%,#b71912 55%,#cf3023 100%);box-shadow:0 5px 16px rgba(95,20,12,.2);border-top:4px solid #f2b329;border-bottom:2px solid #d99f32}
.brand strong{font-size:1.34rem}.brand small{font-size:.84rem;letter-spacing:.08em}.brand svg{width:42px;filter:drop-shadow(0 2px 4px rgba(0,0,0,.2))}.mode-switch{background:rgba(70,0,0,.17);border-color:rgba(255,226,166,.55)}
.progress-nav{top:82px;min-height:72px;background:rgba(255,253,247,.96);border-bottom-color:#ecd6aa;box-shadow:0 4px 12px rgba(99,62,30,.05)}
main{max-width:1560px;padding-top:30px}.page-head{position:relative;margin-bottom:10px;padding:20px 30px;border:1px solid rgba(220,167,70,.52);border-left:8px solid var(--red);border-radius:13px;background:linear-gradient(90deg,rgba(255,255,255,.9),rgba(255,247,227,.7));overflow:hidden}.page-head:after{content:"";position:absolute;right:-24px;top:-40px;width:155px;height:155px;border:24px double rgba(181,26,18,.035);border-radius:50%}.page-head .eyebrow{font-size:.84rem;margin-bottom:5px}.page-head h1{font-size:clamp(2rem,2.7vw,2.8rem);letter-spacing:.03em}.page-head p{font-size:1.02rem;margin-top:7px}.ornament{height:5px;margin:10px 0 24px;background:linear-gradient(90deg,var(--red) 0 15%,var(--gold) 15% 32%,transparent 32%)}
.card{border-color:rgba(220,167,70,.62);background:rgba(255,253,247,.97);box-shadow:var(--shadow)}.btn{min-height:44px;border-radius:8px}.btn.primary{background:linear-gradient(100deg,#a90e09,#c6261b);box-shadow:0 8px 18px rgba(181,26,18,.18)}.btn.primary:hover{background:linear-gradient(100deg,#8d0b08,#b91911);color:#fff}.btn:focus-visible,.choice:focus-visible,.speaker-choice:focus-visible,.cloud-word:focus-visible,.core-triad button:focus-visible{outline:3px solid #efb43b;outline-offset:3px}
.section-ribbon{display:flex;align-items:center;gap:13px;padding:18px 20px;background:linear-gradient(100deg,#99100b,#bc1c13);color:#fff;border-radius:13px 13px 0 0}.section-ribbon>span svg{width:32px;height:32px;fill:none;stroke:#f5cf79}.section-ribbon strong{display:block;font-size:1.12rem}.section-ribbon small{display:block;margin-top:3px;color:#f8dca1}.identity-workbench{display:grid;grid-template-columns:minmax(340px,4fr) minmax(500px,6fr);gap:20px;align-items:stretch}.role-pool{overflow:hidden}.role-list{display:grid;grid-template-columns:1fr 1fr;gap:12px;padding:20px}.role-item{display:grid;grid-template-columns:38px 1fr auto;align-items:center;gap:10px;padding:16px 13px;border:1px solid #eadcc1;border-radius:9px;background:#fff;transition:.2s}.role-item:hover{border-color:var(--gold);transform:translateY(-2px)}.role-no{display:grid;place-items:center;width:34px;height:34px;background:#f6e7bb;color:var(--deep);border-radius:50%;font-weight:800}.role-item strong,.role-item small{display:block}.role-item small{font-size:.76rem;color:var(--muted);margin-top:3px}.role-tag{font-size:.72rem;padding:4px 7px;background:#a91610;color:#fff;border-radius:4px}.pool-note{margin:0 20px 20px;padding:13px;border:1px dashed #dfbd78;background:#fff9e9;color:#775a29;text-align:center;border-radius:8px}.match-guide{padding:0 28px 28px;overflow:hidden}.match-intro{display:flex;align-items:flex-start;gap:16px;margin:0 -28px 18px;padding:24px 28px;background:linear-gradient(110deg,#fff7ed,#fffdf8);border-bottom:1px solid #ecd4aa;text-align:left}.match-intro h2{margin:0;color:var(--deep);font-size:1.55rem}.match-intro p{margin:7px 0 0;color:var(--muted);line-height:1.65}.match-bulb svg{width:48px;height:48px;fill:none;stroke:var(--red);stroke-width:1.6}.match-guide .dimension-grid{grid-template-columns:1fr 1fr;gap:10px;margin:18px 0}.match-guide .dimension{display:flex;align-items:center;gap:10px;padding:13px 15px;text-align:left;background:#fff;border-style:dashed}.match-guide .dimension:last-child{grid-column:1/-1}.match-guide .dimension svg{width:20px;height:20px;stroke:var(--red)}.match-guide .scanner{height:92px}.match-guide .scanner:before{width:62px;height:62px;box-shadow:0 0 0 12px rgba(220,167,70,.12),0 0 0 24px rgba(181,26,18,.05)}.scan-status{font-weight:700;color:#845f19}.match-button{width:100%;font-size:1.06rem}.identity-card{background:linear-gradient(110deg,#fffdf8,#fff2d7);border-width:2px}
.archive-viewer{overflow:hidden;padding-bottom:18px}.archive-ribbon{justify-content:space-between;margin-bottom:0}.archive-ribbon>span{font-size:1.1rem;font-weight:800;color:#ffe3a4}.archive-viewer .video-grid{gap:3px;margin:0;padding:3px;background:#171210}.archive-viewer .video-slot{border:0;border-radius:0;aspect-ratio:16/8.4;background-size:cover;background-position:center;filter:grayscale(1);transition:filter .25s}.archive-viewer .video-slot:nth-child(1){background-image:linear-gradient(rgba(15,10,8,.25),rgba(15,10,8,.7)),url("../images/scene-zunyi.png")}.archive-viewer .video-slot:nth-child(2){background-image:linear-gradient(rgba(15,10,8,.15),rgba(15,10,8,.72)),url("../images/scene-chishui.png")}.archive-viewer .video-slot:nth-child(3){background-image:linear-gradient(rgba(15,10,8,.15),rgba(15,10,8,.72)),url("../images/scene-luding.png")}.archive-viewer .video-slot:nth-child(4){background-image:linear-gradient(rgba(15,10,8,.15),rgba(15,10,8,.76)),url("../images/scene-chishui.png");background-position:70% center}.archive-viewer .video-slot:hover{filter:grayscale(.65)}.archive-viewer .video-slot:before{background:linear-gradient(transparent 48%,rgba(0,0,0,.66) 48%);opacity:.45}.archive-viewer .video-content{width:100%;align-self:end;padding:45px 16px 14px}.archive-viewer .video-content h3{font-size:1.08rem;letter-spacing:.05em}.archive-viewer .video-content small{font-size:.75rem}.archive-viewer .video-icon{width:44px;height:44px}.archive-viewer .btn{padding:7px 13px;min-height:36px}.history-copy{position:relative;margin-top:20px;padding:32px 34px 28px;border-left:5px solid var(--red);background:linear-gradient(90deg,#fffdf8,#fff6e6)}.document-label{display:block;width:max-content;margin:-48px 0 20px;padding:7px 14px;background:var(--deep);color:#fff;border-radius:5px;font-weight:700;letter-spacing:.08em}
.meeting-layout{grid-template-columns:minmax(0,7.5fr) minmax(310px,2.5fr)}.meeting-stage{display:grid;grid-template-columns:220px minmax(0,1fr);grid-template-rows:1fr auto;min-height:650px;background:linear-gradient(rgba(40,15,11,.2),rgba(25,9,7,.72)),url("../images/scene-zunyi.png") center/cover}.meeting-stage:before{background:linear-gradient(90deg,rgba(34,8,6,.18),rgba(30,9,6,.7))}.speaker-rail{grid-row:1/3;position:relative;z-index:2;padding:16px;background:linear-gradient(180deg,#b61c12,#7d0b08);border-right:2px solid var(--gold)}.speaker-rail-title{padding:8px 8px 15px;color:#ffe4a7;font-weight:800;letter-spacing:.08em}.speaker-choice{width:100%;display:grid;grid-template-columns:42px 1fr;gap:3px 9px;align-items:center;margin-bottom:12px;padding:15px 12px;border:1px solid rgba(255,226,167,.35);border-radius:9px;background:rgba(94,5,4,.5);color:#fff;text-align:left}.speaker-choice span{grid-row:1/3;display:grid;place-items:center;width:38px;height:38px;border-radius:50%;background:#fff1d2;color:#9c130d}.speaker-choice span svg{width:21px;height:21px;fill:none;stroke:currentColor;stroke-width:2}.speaker-choice small{color:#f0c982}.speaker-choice.active{background:#fff2d8;color:#7d0b08;border-color:#f2c661;box-shadow:0 5px 18px rgba(47,4,3,.22)}.speaker-choice.active small{color:#8b621d}.stage-visual{grid-column:2;min-height:550px;z-index:1}.media-controls{grid-column:2}.discussion{height:650px;border-top:6px solid var(--red)}.discussion h2{background:linear-gradient(90deg,#fff5df,#fff);font-size:1.25rem}.comment{background:#fff;border:1px solid #eee0c4;border-radius:8px;margin-bottom:9px}.compose{background:#fff9ec}
.sandbox-workspace{margin-top:18px;grid-template-columns:minmax(0,6.2fr) minmax(380px,3.8fr);gap:0;border:2px solid #8a5929;border-radius:15px;overflow:hidden;box-shadow:0 18px 42px rgba(56,29,12,.18)}.sandbox-workspace .sandbox{border:0;border-radius:0;box-shadow:none;background:linear-gradient(rgba(245,222,173,.6),rgba(224,186,119,.6)),repeating-linear-gradient(8deg,rgba(80,48,22,.04) 0 1px,transparent 1px 8px)}.map-caption{display:flex;justify-content:space-between;align-items:center;padding:12px 15px;margin:-6px -6px 0;background:rgba(81,46,23,.9);color:#fff1cf;border-bottom:2px solid #bd7d36}.map-caption span{font-size:.78rem;opacity:.8}.sandbox-analysis{padding:24px;background:linear-gradient(145deg,#321d14,#1d120d);color:#fff}.sandbox-analysis>h2{margin:0;color:#fff1d0;font-family:KaiTi;font-size:1.7rem}.sandbox-analysis>p{color:#d5b47b}.sandbox-analysis .metric{background:rgba(255,251,239,.07);border-color:rgba(225,182,99,.35);box-shadow:none}.sandbox-analysis .metric small{color:#e5cfaa}.sandbox-analysis .metric strong{color:#f2c667}.sandbox-analysis .risk-metric{background:rgba(181,26,18,.24)}.sandbox-analysis .risk-metric strong{color:#ff6d50}.sandbox-analysis .line-panel{background:#fff8e7;border-color:#d6a548;box-shadow:none}.conclusion-panel{margin-top:20px;text-align:center;border:2px solid var(--red);background:linear-gradient(100deg,#fff8e9,#fff0d5)}.conclusion-panel>span{display:inline-block;padding:5px 12px;background:var(--red);color:#fff;border-radius:4px}.conclusion-panel h2{font-family:KaiTi;color:var(--deep);font-size:1.7rem}
.belief-map{height:390px;background:radial-gradient(circle at 50% 50%,rgba(220,167,70,.13),transparent 43%),linear-gradient(#fffefb,#fff8e9);border:2px solid #e1bd76}.belief-rays{position:absolute;left:50%;top:50%;width:62%;height:70%;transform:translate(-50%,-50%);clip-path:polygon(50% 0,100% 100%,0 100%);background:linear-gradient(145deg,rgba(220,167,70,.08),rgba(181,26,18,.045));border-bottom:2px solid rgba(181,26,18,.28)}.core-triad{position:absolute;left:50%;top:49%;transform:translate(-50%,-50%);display:grid;gap:8px;width:min(460px,55%);text-align:center;z-index:2}.core-triad button{border:0;background:transparent;color:var(--deep);font-family:KaiTi;font-weight:900;text-shadow:0 2px #f0c565;cursor:pointer}.core-triad button:nth-child(1){font-size:1.85rem}.core-triad button:nth-child(2){font-size:2.25rem}.core-triad button:nth-child(3){font-size:2.7rem}.belief-map .cloud-word{border:0;background:transparent;font-weight:800;cursor:pointer;padding:6px;color:#8a5a13}.belief-map .cloud-word:nth-of-type(even){color:#6f100c}.belief-map .cloud-word:hover,.core-triad button:hover{color:var(--red)}
.console-menu{border-top:6px solid var(--red);padding:14px}.console-menu button{border-left:3px solid transparent;margin-bottom:3px}.console-menu button.active{border-left-color:var(--red);background:linear-gradient(90deg,#f6dfa9,#fff7e4)}.control-strip{border-top:5px solid var(--gold);background:linear-gradient(90deg,#fffdf8,#fff4d8)}.teacher-hero{background:linear-gradient(110deg,rgba(122,12,10,.96),rgba(181,26,18,.91)),url("../images/scene-zunyi.png") center/cover;border:2px solid var(--gold)}.panel>h2{font-family:KaiTi;color:var(--deep);font-size:1.65rem}.screen-mode{background:var(--paper);background-image:radial-gradient(circle at 85% 8%,rgba(220,167,70,.12),transparent 28%)}
.choice.selected:before{content:"";width:20px;height:20px;border-radius:50%;background-color:var(--red);background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20'%3E%3Cpath d='M4 10l4 4 8-9' fill='none' stroke='white' stroke-width='2.3' stroke-linecap='round'/%3E%3C/svg%3E");background-size:100%;float:right}
@media(max-width:1150px){.identity-workbench{grid-template-columns:1fr}.meeting-stage{grid-template-columns:180px minmax(0,1fr)}.meeting-layout,.sandbox-workspace{grid-template-columns:1fr}.discussion{height:560px}.sandbox-analysis{border-top:2px solid var(--gold)}}
@media(max-width:760px){.role-list{grid-template-columns:1fr}.match-guide .dimension-grid{grid-template-columns:1fr}.match-guide .dimension:last-child{grid-column:auto}.meeting-stage{display:block}.speaker-rail{display:flex;gap:8px;overflow-x:auto;border-right:0;border-bottom:2px solid var(--gold)}.speaker-rail-title{display:none}.speaker-choice{min-width:185px;margin:0}.stage-visual{min-height:430px}.belief-map{height:430px}.core-triad{width:75%}.core-triad button:nth-child(3){font-size:2.1rem}.page-head{padding:17px 20px}.archive-viewer .video-grid{grid-template-columns:1fr}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{scroll-behavior:auto!important;animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}.scene-card:hover,.role-item:hover{transform:none}}
@media print{.topbar,.progress-nav,.console-menu,.toolbar,.control-strip{display:none}.screen-mode{position:static}.card{box-shadow:none}}

/* 会议页最终覆盖层：置于全局主题之后，确保视频区与讨论区比例不被旧规则覆盖 */
.meeting-layout{grid-template-columns:minmax(0,72fr) minmax(390px,28fr);gap:20px}
.meeting-stage{height:760px;min-height:760px;display:grid;grid-template-columns:1fr;grid-template-rows:auto minmax(0,1fr) auto;background:#38100d}
.meeting-stage:before{z-index:-1;background:linear-gradient(rgba(54,14,10,.05),rgba(30,8,6,.5)),repeating-linear-gradient(90deg,transparent 0 64px,rgba(214,165,72,.05) 65px)}
.meeting-stage .stage-visual{grid-column:1;min-height:0;height:auto;padding:32px;align-items:flex-end;background-image:linear-gradient(180deg,rgba(46,13,9,.04) 35%,rgba(34,9,7,.62) 100%),url('../images/scene-zunyi.png');background-size:cover;background-position:center}
.meeting-stage .media-controls{grid-column:1}.discussion{height:760px;min-height:760px}.discussion-title h2{padding:0;background:none}.discussion .chat-message{display:grid;grid-template-columns:46px minmax(0,1fr);gap:11px;margin:0 0 18px;padding:0;border:0;border-radius:0;background:transparent}.discussion .compose{padding:15px;background:#fffaf0}
@media(max-width:1100px){.meeting-layout{grid-template-columns:1fr}.meeting-stage{height:680px;min-height:680px;grid-template-columns:1fr}.discussion{height:650px;min-height:650px}}
@media(max-width:680px){.meeting-stage{height:610px;min-height:610px;display:grid}.meeting-stage .stage-visual{min-height:0}.discussion{height:660px;min-height:660px}.discussion .chat-message{grid-template-columns:40px minmax(0,1fr)}.discussion .compose{padding:12px}}

/* 党性认知图谱：使用用户提供的成品视觉图，兼容学生端、教师端与课堂大屏 */
.belief-poster{width:100%;margin:18px 0 0;overflow:hidden;border:2px solid #e1bd76;border-radius:14px;background:#fffaf0;box-shadow:0 10px 28px rgba(91,45,18,.09)}
.belief-poster img{display:block;width:100%;height:auto;aspect-ratio:1673/943;object-fit:contain;background:#fffaf0}
@media(max-width:760px){.belief-poster{margin-top:14px;border-radius:10px}.belief-poster img{aspect-ratio:auto}}

/* 完成页重新开始操作 */
.completion-actions{align-items:center}.restart-btn{min-width:138px}.restart-btn:before{content:"↻";font-size:1.2rem;line-height:1}
@media(max-width:600px){.completion-actions{display:grid;grid-template-columns:1fr}.completion-actions .btn{width:100%}}

/* 湘江纪实资料：整张卡片点击一次即完成，修正未约束 SVG 造成的黑色半圆 */
.archive-viewer .video-slot{isolation:isolate}.archive-viewer .video-slot:before{z-index:1;pointer-events:none}.archive-viewer .video-slot video{position:relative;z-index:2;display:block}.archive-viewer .video-card-action{position:absolute;inset:0;z-index:3;width:100%;height:100%;display:grid;place-items:center;padding:0;border:0;background:transparent;color:#fff;text-align:center}.archive-viewer .video-card-action:hover{background:rgba(120,16,10,.12)}.archive-viewer .video-card-action:focus-visible{outline:4px solid #f2b944;outline-offset:-5px}.archive-viewer .video-content{position:relative;z-index:1;display:block;width:100%;align-self:end;padding:54px 18px 20px;pointer-events:none}.archive-viewer .video-icon{width:48px;height:48px;display:grid;place-items:center;margin:0 auto 8px;border:2px solid #f1cf82;border-radius:50%;background:rgba(111,14,10,.82);color:#fff4ce;box-shadow:0 5px 18px rgba(0,0,0,.25)}.archive-viewer .video-icon svg{width:24px;height:24px;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}.archive-viewer .video-content h3{margin:7px 0 4px}.archive-viewer .video-content small{display:block}.video-cta{display:inline-flex;margin-top:10px;padding:7px 13px;border:1px solid #efc76e;border-radius:6px;background:#b51811;color:#fff8dd;font-size:.8rem}.archive-viewer .video-slot.watched{filter:grayscale(.25)}.archive-viewer .video-slot.watched .video-cta{background:#8b6518}.archive-viewer .watched-mark{z-index:4}.archive-viewer .video-watched-mark{pointer-events:none}

/* 会议视频改为单一主画面，不再显示参会人员视角选择与分段控制 */
.meeting-stage{grid-template-rows:minmax(0,1fr)}.meeting-stage .stage-visual{grid-row:1;min-height:100%}.meeting-caption{margin:0;max-width:720px}.meeting-stage .meeting-caption{z-index:2}
@media(max-width:680px){.meeting-stage .meeting-caption{margin:0;max-width:100%}}

/* 学生匿名头像与讨论区图标操作 */
.student-avatar svg{width:28px;height:28px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.icon-action{width:44px;height:44px;flex:none;display:grid;place-items:center;padding:0;border:1px solid #d9bd83;border-radius:50%;background:#fff;color:var(--red);box-shadow:0 4px 12px rgba(105,42,20,.08);transition:.18s}
.icon-action:hover{transform:translateY(-1px);background:#fff3df;border-color:var(--gold)}.icon-action:focus-visible{outline:3px solid rgba(181,34,24,.2);outline-offset:2px}
.icon-action.primary{border-color:var(--red);background:var(--red);color:#fff}.icon-action svg{width:21px;height:21px;fill:none;stroke:currentColor;stroke-width:1.9;stroke-linecap:round;stroke-linejoin:round}
.voice-row .transcript-toggle.icon-action{width:36px;height:36px;padding:0;border:1px solid #dfc691;border-radius:50%;background:#fff;color:var(--red)}
.discussion .compose-actions .icon-action{width:40px;height:40px;flex:none}.compose-input-shell #recordState:empty{display:none}.compose-input-shell #recordState .recording{padding:4px 8px;border-radius:99px;background:#fff4d8;color:#7c5718}.voice-message.playing{border-color:var(--red);box-shadow:0 0 0 3px rgba(181,34,24,.1)}
.voice-message.playing .voice-play-icon{animation:voice-play-pulse 1.25s ease-out infinite}
.voice-message.playing .voice-bars b{transform-origin:center;animation:voice-bar-wave .72s ease-in-out infinite}
.voice-message.playing .voice-bars b:nth-child(2){animation-delay:.08s}.voice-message.playing .voice-bars b:nth-child(3){animation-delay:.16s}.voice-message.playing .voice-bars b:nth-child(4){animation-delay:.24s}.voice-message.playing .voice-bars b:nth-child(5){animation-delay:.12s}.voice-message.playing .voice-bars b:nth-child(6){animation-delay:.04s}
@keyframes voice-bar-wave{0%,100%{transform:scaleY(.45);opacity:.62}50%{transform:scaleY(1);opacity:1}}
@keyframes voice-play-pulse{0%,100%{box-shadow:0 0 0 0 rgba(181,34,24,.22)}50%{box-shadow:0 0 0 6px rgba(181,34,24,0)}}
@media(prefers-reduced-motion:reduce){.voice-message.playing .voice-play-icon,.voice-message.playing .voice-bars b{animation:none}}

/* 两张成品沙盘图替代原动态沙盘组件 */
.sandbox-reference-grid{display:grid;grid-template-columns:1fr;gap:22px;margin-top:22px}.sandbox-reference-card{margin:0;overflow:hidden;background:#24160f;border:1px solid #9d6c36}.sandbox-reference-card img{display:block;width:100%;height:auto;aspect-ratio:16/9;object-fit:contain;background:#18100c}.sandbox-reference-card figcaption{display:block;min-height:118px;padding:15px 18px 17px;color:#fff2d2;background:linear-gradient(90deg,#411d12,#7e281d)}.sandbox-caption-head{display:flex;align-items:center;justify-content:space-between;gap:18px}.sandbox-caption-head strong{font-size:1.05rem}.sandbox-caption-head span{font-size:.82rem;opacity:.82}.sandbox-caption-source{margin:12px 0 0;padding-top:11px;border-top:1px solid rgba(255,226,188,.22);color:#f5ddbd;font-size:.8rem;line-height:1.75}.sandbox-caption-source b{color:#ffe6a6}.sandbox-actions{margin-top:22px}.bigscreen-sandbox{display:grid;place-items:center;min-height:calc(100vh - 250px);padding:clamp(24px,4vh,48px) clamp(28px,7vw,110px);background:#1f140f}.bigscreen-sandbox-figure{width:min(78vw,1180px);max-width:100%;margin:0}.bigscreen-sandbox .bigscreen-sandbox-figure img{width:100%;max-height:58vh;margin:0;border:1px solid rgba(214,165,72,.45);box-shadow:0 14px 36px rgba(0,0,0,.3)}
@media(max-width:760px){.sandbox-reference-card figcaption{min-height:0}.sandbox-caption-head{align-items:flex-start;flex-direction:column;gap:5px}.bigscreen-sandbox{min-height:auto;padding:18px}.bigscreen-sandbox-figure{width:100%}.bigscreen-sandbox .bigscreen-sandbox-figure img{max-height:54vh}}

/* 教师端热力分布补充完整选项内容 */
.option-detail-list{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin:20px 0 24px}.option-detail-list article{padding:14px 15px;border:1px solid #e5c88b;border-left:4px solid var(--red);border-radius:9px;background:#fff9ec}.option-detail-list strong{color:var(--deep)}.option-detail-list p{margin:7px 0 0;color:#5e5148;font-size:.88rem;line-height:1.6}
@media(max-width:820px){.option-detail-list{grid-template-columns:1fr}.sandbox-reference-card figcaption{align-items:flex-start;flex-direction:column;gap:5px}}

/* 宽屏学习场景充分利用可视区域 */
main{width:100%;max-width:none;padding-left:clamp(20px,2.4vw,52px);padding-right:clamp(20px,2.4vw,52px)}
.meeting-layout{grid-template-columns:minmax(0,74fr) minmax(420px,26fr);gap:24px}
.meeting-stage,.discussion{height:clamp(680px,70vh,1080px);min-height:680px}.meeting-stage .stage-visual{min-height:100%}
.archive-viewer .video-grid{min-height:calc(100vh - 320px);grid-template-rows:repeat(2,minmax(280px,1fr))}.archive-viewer .video-slot{min-height:clamp(280px,34vh,540px);aspect-ratio:auto}

/* 提交按钮和结果提示分行显示，避免视觉重叠 */
.reflection-submit-actions{margin-bottom:26px}.reflection-submit-notice{position:relative;clear:both;margin-top:0}
@media(max-width:1100px){.meeting-layout{grid-template-columns:1fr}.meeting-stage,.discussion{height:auto;min-height:650px}}

/* 本人发表的观点靠右显示，与其他学员消息形成清晰区分 */
.discussion .chat-message.own-message{grid-template-columns:minmax(0,1fr) 46px}
.discussion .own-message .student-avatar{grid-column:2;grid-row:1;background:linear-gradient(145deg,#a5140e,#cf3325)}
.discussion .own-message .message-body{grid-column:1;grid-row:1;text-align:right}
.discussion .own-message .comment-head{flex-direction:row-reverse}
.discussion .own-message .text-bubble,.discussion .own-message .voice-transcript{width:max-content;max-width:88%;margin-left:auto;text-align:left;border-radius:14px 4px 14px 14px;background:#fff0cf}
.discussion .own-message .text-bubble:before{left:auto;right:-7px;border-left:0;border-right:8px solid transparent;border-top-color:#fff0cf;filter:drop-shadow(1px -1px 0 #e1bd75)}
.discussion .own-message .voice-row{justify-content:flex-end}
.discussion .own-message .voice-transcript{margin-top:8px}

/* 教师端身份统计保持单行标签，并拉开各统计项的呼吸空间 */
.identity-role-bars{display:grid;gap:14px;margin:22px 0 26px}
.identity-role-bars .bar-row{grid-template-columns:minmax(180px,max-content) minmax(0,1fr) 44px;gap:18px;margin:0}
.identity-role-bars .bar-row>span{white-space:nowrap;line-height:1.4}
.identity-role-bars .bar-track{height:16px}
@media(max-width:680px){.discussion .chat-message.own-message{grid-template-columns:minmax(0,1fr) 40px}.identity-role-bars .bar-row{grid-template-columns:1fr 42px;gap:8px 12px}.identity-role-bars .bar-row>span{grid-column:1/3}.identity-role-bars .bar-track{grid-column:1}}

/* 普通沙盘页面：标题与教学提示保持全宽，仅缩小下方两张推演图 */
.sandbox-reference-grid{width:min(86%,1280px);margin-left:auto;margin-right:auto}
@media(max-width:760px){.sandbox-reference-grid{width:100%}}

/* 党性思考：限制回答区在超宽屏上的横向跨度，并对齐下一步操作 */
.reflection-panel,.reflection-panel+.actions{width:min(86%,1500px);margin-left:auto;margin-right:auto}
@media(max-width:760px){.reflection-panel,.reflection-panel+.actions{width:100%}}

/* 移除全局斜线与页面标题圆环装饰 */
body:before,.page-head:after{content:none!important;display:none!important}

/* 教师端不显示学生学习步骤栏，并释放其占用的高度 */
.progress-nav[hidden]{display:none!important}
.teacher-mode main{padding-top:18px}
.teacher-mode .console-menu{top:100px}

/* 精简后的课堂控制与理论学习操作区 */
.control-strip{gap:12px;align-items:center}
.theory-actions{margin-top:28px;margin-bottom:0}

/* 湘江抉择：增强三个行动选项的层次与交互识别 */
.decision-grid{gap:20px;align-items:stretch}
.decision-grid .choice{position:relative;isolation:isolate;overflow:hidden;min-height:190px;padding:34px 32px 30px;border:1px solid #dfbd78;border-top:5px solid #d9a53e;border-radius:16px;background:linear-gradient(155deg,#fffdf8 0%,#fffaf0 72%,#f8ebca 100%);box-shadow:0 10px 24px rgba(99,55,21,.08);font-size:1rem;line-height:1.8;transition:transform .2s ease,border-color .2s ease,box-shadow .2s ease,background .2s ease}
.decision-grid .choice:after{position:absolute;right:18px;bottom:4px;z-index:-1;color:rgba(142,28,18,.065);font-family:Georgia,serif;font-size:5.2rem;font-weight:800;line-height:1;letter-spacing:-.05em}
.decision-grid .choice:nth-child(1):after{content:"01"}.decision-grid .choice:nth-child(2):after{content:"02"}.decision-grid .choice:nth-child(3):after{content:"03"}
.decision-grid .choice strong{display:inline-block;margin-bottom:13px;padding:5px 12px;border-radius:4px;background:#f4e1ad;color:#74110d;font-size:1.08rem;letter-spacing:.06em}
.decision-grid .choice:hover{transform:translateY(-4px);border-color:#c9902c;box-shadow:0 16px 32px rgba(99,55,21,.14);background:linear-gradient(155deg,#fffefb,#fff5dc)}
.decision-grid .choice.selected{transform:translateY(-3px);border-color:#ae1b13;border-top-color:#ae1b13;background:linear-gradient(150deg,#fffaf0,#ffefc7);box-shadow:0 0 0 3px rgba(214,165,72,.35),0 16px 34px rgba(119,30,16,.15)}
.decision-grid .choice.selected strong{background:#a91610;color:#fff}
.decision-grid .choice.selected:before{position:absolute;right:20px;top:20px;float:none;width:26px;height:26px;box-shadow:0 3px 10px rgba(116,17,13,.2)}
@media(max-width:980px){.decision-grid .choice{min-height:150px;padding:28px 26px}.decision-grid .choice:after{font-size:4.2rem}}

/* 学习完成页：身份化 AI 总结与学习档案 */
.completion{max-width:1180px;text-align:left}
.completion .page-head{text-align:center}
.completion-overview{display:grid;grid-template-columns:300px minmax(0,1fr);gap:22px;align-items:stretch}
.completion-score{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:30px 24px;text-align:center;border-top:5px solid var(--gold);background:linear-gradient(160deg,#fffdf8,#fff4d8)}
.completion .completion-score .ring{width:136px;height:136px;margin:0 0 18px;background:conic-gradient(var(--gold) 100%,#eee 0);box-shadow:0 0 0 8px rgba(214,165,72,.1)}
.completion .completion-score .ring:after{inset:13px;background:#fffaf0}
.completion-score>span{color:#8b671c;font-size:.78rem;font-weight:700;letter-spacing:.12em}
.completion-score h2{margin:7px 0 8px;color:var(--deep);font-size:1.35rem}
.completion-score p{margin:0;color:var(--muted);font-size:.88rem;line-height:1.65}
.ai-summary{padding:30px 32px;text-align:left;border-top:5px solid var(--red);background:#fffdf9}
.ai-summary header{display:flex;align-items:center;gap:12px;margin-bottom:24px}
.ai-summary header p{margin:0;color:var(--deep);font-size:1.05rem;font-weight:800}
.ai-summary header small{display:block;margin-top:3px;color:var(--muted)}
.ai-mark{width:44px;height:44px;display:grid;place-items:center;flex:none;border-radius:10px;background:var(--deep);color:#ffe2a2;font-family:Georgia,serif;font-weight:800;letter-spacing:.04em;box-shadow:inset 0 0 0 1px rgba(255,226,162,.35)}
.ai-summary h2{margin:0 0 10px;color:var(--deep);font-family:STKaiti,KaiTi,serif;font-size:1.75rem}
.ai-lead{margin:0;padding:15px 17px;border-left:4px solid var(--gold);background:#fff5dc;color:#47362d;line-height:1.8}
.ai-evidence{display:grid;grid-template-columns:1fr 1fr;gap:22px;margin-top:22px}
.ai-evidence>div{padding-top:15px;border-top:1px solid var(--line)}
.ai-evidence strong{color:#75120e;font-size:.9rem}
.ai-evidence p{margin:7px 0 0;color:#64564d;font-size:.9rem;line-height:1.7}
.summary-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:20px}
.summary-tags span{padding:6px 10px;border:1px solid #dfc487;border-radius:99px;background:#fff9eb;color:#7a5612;font-size:.8rem;font-weight:700}
.learning-record{margin-top:28px;text-align:left}
.section-title{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:14px}
.section-title small{color:var(--red);font-weight:700;letter-spacing:.1em}
.section-title h2{margin:4px 0 0;color:var(--deep);font-size:1.45rem}
.section-title>span{color:var(--muted);font-size:.82rem}
.completion .summary-grid{gap:14px}
.completion .summary-grid .card{min-height:112px;padding:19px 20px;border-left:4px solid #dfb657;background:#fffdf9}
.completion .summary-grid small{color:var(--muted)}
.completion .summary-grid h3{margin:12px 0 0;color:#342720;font-size:1.05rem;line-height:1.5}
.completion-actions{margin-top:24px;justify-content:flex-end}
@media(max-width:900px){.completion-overview{grid-template-columns:1fr}.completion-score{display:grid;grid-template-columns:150px 1fr;grid-template-rows:auto auto auto;padding:24px;text-align:left}.completion .completion-score .ring{grid-row:1/4;margin:0 22px 0 0}.completion-score>span,.completion-score h2,.completion-score p{grid-column:2}.ai-evidence{grid-template-columns:1fr}.completion .summary-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:600px){.completion-score{display:flex;text-align:center}.completion .completion-score .ring{margin:0 0 18px}.ai-summary{padding:24px 20px}.completion .summary-grid{grid-template-columns:1fr}.section-title{align-items:flex-start;flex-direction:column;gap:5px}}

/* 主内容由脚本程序化聚焦时不显示浏览器默认黑色轮廓；交互控件的焦点提示保持不变 */
#app:focus{outline:none}

/* 身份卡使用历史场景与徽章式人物图形，避免纯红色占位块 */
.identity-card .portrait{position:relative;isolation:isolate;overflow:hidden;background:linear-gradient(180deg,rgba(46,23,13,.2),rgba(87,20,14,.88)),url("../images/scene-zunyi.png") center/cover;color:#fff1c8;box-shadow:inset 0 0 0 1px rgba(242,202,112,.55)}
.identity-card .portrait:before{content:"";position:absolute;inset:0;z-index:0;background:radial-gradient(circle at 50% 38%,rgba(255,224,154,.24),transparent 38%)}
.identity-card .portrait svg{position:relative;z-index:1;width:96px;height:96px;padding:18px;border:2px solid rgba(255,225,158,.82);border-radius:50%;background:rgba(91,21,15,.72);filter:drop-shadow(0 8px 16px rgba(0,0,0,.28))}
.portrait-role{position:absolute;left:14px;right:14px;bottom:16px;z-index:1;padding:8px 10px;border-top:1px solid rgba(255,223,153,.65);color:#fff2cc;text-align:center;font-weight:800;letter-spacing:.12em;line-height:1.5;text-shadow:0 2px 5px rgba(0,0,0,.7)}

/* 顶部个人中心：收起常驻身份切换，按需展开 */
.account-switcher{position:relative;flex:none}
.account-trigger{display:flex;align-items:center;gap:10px;min-width:148px;min-height:50px;padding:6px 11px 6px 7px;border:1px solid rgba(255,226,166,.58);border-radius:13px;background:rgba(88,8,5,.2);color:#fff;cursor:pointer;transition:background .18s ease,border-color .18s ease,box-shadow .18s ease}
.account-trigger:hover,.account-trigger[aria-expanded="true"]{border-color:rgba(255,235,190,.92);background:rgba(88,8,5,.38);box-shadow:0 7px 18px rgba(74,7,4,.18)}
.account-avatar{display:grid;place-items:center;width:36px;height:36px;flex:none;border-radius:50%;background:#efd28a;color:#7a100c;box-shadow:inset 0 0 0 1px rgba(255,255,255,.48)}
.account-avatar svg{width:23px;height:23px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round}
.account-copy{display:grid;gap:2px;min-width:58px;text-align:left;line-height:1.1}
.account-copy small{color:#f7dca0;font-size:.68rem;font-weight:500;letter-spacing:.06em}
.account-copy strong{color:#fff;font-size:.88rem}
.account-chevron{width:17px;height:17px;margin-left:auto;fill:none;stroke:#f8dda2;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;transition:transform .18s ease}
.account-trigger[aria-expanded="true"] .account-chevron{transform:rotate(180deg)}
.account-menu{position:absolute;top:calc(100% + 10px);right:0;z-index:70;width:252px;padding:8px;border:1px solid #e3c477;border-radius:14px;background:#fffdf8;box-shadow:0 18px 44px rgba(65,25,11,.2)}
.account-menu[hidden]{display:none}
.account-menu-title{margin:4px 8px 7px;color:#8a786b;font-size:.72rem;font-weight:700;letter-spacing:.1em}
.account-menu button{position:relative;display:grid;grid-template-columns:34px 1fr 18px;align-items:center;gap:10px;width:100%;padding:11px 10px;border:0;border-radius:10px;background:transparent;color:#352820;text-align:left;cursor:pointer}
.account-menu button:hover,.account-menu button:focus-visible{background:#fff3d6;outline:none}
.account-menu button.active{background:linear-gradient(90deg,#f9e8bc,#fff7e5);color:#79120e}
.account-menu button.active:after{content:"✓";color:#a71913;font-weight:900;text-align:center}
.account-menu button strong,.account-menu button small{display:block}
.account-menu button strong{font-size:.9rem}
.account-menu button small{margin-top:3px;color:#817268;font-size:.72rem}
.account-menu-icon{display:grid;place-items:center;width:32px;height:32px;border:1px solid #e3c477;border-radius:50%;background:#fffaf0;color:#861713;font-size:.77rem;font-weight:900}
@media(max-width:600px){.account-trigger{min-width:auto;padding-right:8px}.account-copy small{display:none}.account-copy{min-width:48px}.account-menu{width:min(252px,calc(100vw - 24px))}}

/* 沙盘图片说明栏：以推演依据替代原标题与观察提示 */
.sandbox-reference-card figcaption{display:flex;align-items:center;min-height:104px;padding:19px 22px}
.sandbox-caption-source{margin:0;padding:0;border:0;color:#f8e4c5;font-size:1rem;line-height:1.85}
.sandbox-caption-source b{font-size:1.03rem;letter-spacing:.04em}
@media(max-width:760px){.sandbox-reference-card figcaption{min-height:auto;padding:16px}.sandbox-caption-source{font-size:.9rem}}