/* 凸透镜成像 · 立体光具座：画面专属样式 */
.left{grid-template-rows:minmax(0,1fr)}
.figure-wrap{border-radius:var(--r);overflow:hidden;background:#17140F}
#gl{position:absolute;inset:0;width:100%;height:100%;display:block;touch-action:none;outline:none}
#gl.grab{cursor:grab}#gl.grabbing{cursor:grabbing}

/* 三档入口 */
.ui-switch{display:flex;border:1.5px solid var(--ink);border-radius:8px;overflow:hidden;background:var(--bg)}
.ui-switch button{border:0;border-right:1px solid var(--hair);border-radius:0;background:transparent;color:var(--ink);font-size:.82rem;padding:.42rem .9rem}
.ui-switch button:last-child{border-right:0}
.ui-switch button.on{background:var(--ink);color:var(--honey)}
@media(hover:hover) and (pointer:fine){.ui-switch button:not(.on):hover{background:var(--honey-soft);color:var(--ink)}}
.controls{display:none}
body[data-ui="auto"] .bar-auto,body[data-ui="guide"] .bar-guide,body[data-ui="free"] .bar-free,body[data-ui="class"] .bar-class{display:grid}
body:not([data-ui="class"]) .class-only{display:none}
body[data-ui="guide"] .views,body[data-ui="guide"] .drag-hint,body[data-ui="auto"] .views,body[data-ui="auto"] .drag-hint,body[data-ui="auto"] .readouts{display:none}
body[data-ui="guide"] .readouts{right:auto;left:10px}
.controls fieldset{border:0;padding:0;margin:0;display:flex;gap:6px;align-items:center;color:#DCE5DF;font-size:.82rem}.controls legend{float:left;margin-right:6px;font-weight:700}

/* 画面上的标签与手势提示 */
.tags{position:absolute;inset:0;pointer-events:none}
.tag{position:absolute;transform:translate(-50%,-100%);background:var(--bg);color:var(--ink);border:1.5px solid var(--ink);border-radius:8px;padding:.3rem .6rem .34rem;font-weight:800;font-size:.86rem;white-space:nowrap;box-shadow:2px 2px 0 var(--honey);transition:opacity .4s}
.tag small{display:block;font-weight:600;font-size:.72rem;color:var(--muted)}
.tag:after{content:"";position:absolute;left:50%;bottom:-7px;width:10px;height:10px;background:var(--bg);border-right:1.5px solid var(--ink);border-bottom:1.5px solid var(--ink);transform:translateX(-50%) rotate(45deg)}
.hand{position:absolute;left:0;top:0;pointer-events:none;transform:translate(-50%,-50%)}
.hand .pulse{position:absolute;left:-26px;top:-26px;width:52px;height:52px;border-radius:50%;border:3px solid var(--honey);animation:pulse 1.4s ease-out infinite}
.hand .pulse:before{content:"";position:absolute;inset:16px;border-radius:50%;background:var(--honey)}
.hand-label{position:absolute;left:50%;top:34px;transform:translateX(-50%);background:var(--honey);color:var(--ink);font-weight:900;font-size:.95rem;padding:.32rem .8rem;border-radius:999px;white-space:nowrap;box-shadow:0 2px 0 rgba(0,0,0,.25)}
.hand-label:before{content:"⟵ "}.hand-label:after{content:" ⟶"}
@keyframes pulse{0%{transform:scale(.6);opacity:1}100%{transform:scale(1.6);opacity:0}}
@media (prefers-reduced-motion:reduce){.hand .pulse{animation:none}}

.views{position:absolute;left:10px;top:10px;display:flex;background:rgba(254,252,246,.94);border:1.5px solid var(--ink);border-radius:8px;overflow:hidden}
.views button{border:0;border-right:1px solid var(--hair);border-radius:0;background:transparent;color:var(--ink);font-size:.78rem;padding:.38rem .66rem}
.views button:last-child{border-right:0}
.views button.on{background:var(--honey);color:var(--ink)}
@media(hover:hover) and (pointer:fine){.views button:not(.on):hover{background:var(--honey-soft);color:var(--ink)}}

.readouts{position:absolute;right:10px;top:10px;display:flex;pointer-events:none;background:rgba(254,252,246,.95);border:1.5px solid var(--ink);border-radius:8px;box-shadow:3px 3px 0 var(--honey)}
.ro{padding:.38rem .8rem .42rem;border-right:1px solid var(--hair);min-width:5.8rem;display:flex;flex-direction:column;justify-content:center}
.ro:last-child{border-right:0}
.ro.img{min-width:9.6rem}
.ro small{font-size:.72rem;font-weight:700;color:var(--muted);letter-spacing:.02em}
.ro b{font-family:var(--serif);font-weight:900;font-size:1.55rem;line-height:1.1;font-variant-numeric:tabular-nums}
.ro b i{font-style:normal;font-family:var(--sans);font-size:.5em;color:var(--muted);margin-left:3px;font-weight:600}
.ro.img b{font-size:1.08rem;line-height:1.35}.ro.img b.q{color:var(--terra);font-size:1.55rem}
.ro .bar{height:7px;border-radius:999px;background:var(--hair);overflow:hidden;margin:6px 0 4px;width:6.4rem}
.ro .bar span{display:block;height:100%;width:0;background:var(--terra);border-radius:999px;transition:width .12s,background .2s}
.ro .bar span.sharp{background:var(--pine)}
.ro em{font-style:normal;font-weight:800;font-size:.8rem;color:var(--terra)}.ro em.sharp{color:var(--pine)}

.closeup{position:absolute;right:10px;bottom:10px;margin:0;pointer-events:none;width:clamp(220px,27%,360px);background:var(--night);border-radius:8px;border:1.5px solid var(--ink);padding:6px 7px 7px;box-shadow:3px 3px 0 var(--honey);transition:box-shadow .3s}
.closeup.win{box-shadow:0 0 0 4px var(--honey),3px 3px 0 var(--honey)}
.closeup figcaption{display:flex;justify-content:space-between;color:var(--honey);font-size:.76rem;font-weight:700;letter-spacing:.04em;padding:0 2px 5px}
.zoom-tag{color:#CFC6B0;font-weight:600;font-size:.92em;margin-left:4px}
.closeup figcaption em{font-style:normal;color:#CFC6B0;font-weight:600}
#screenView{display:block;width:100%;aspect-ratio:4/3;border-radius:4px}
.drag-hint{position:absolute;left:12px;bottom:8px;margin:0;color:rgba(243,238,223,.72);font-size:.74rem}
.figure-wrap.light .drag-hint{color:var(--muted)}

/* 自动讲解 */
.subtitle{position:absolute;left:50%;bottom:16px;transform:translateX(-50%);max-width:min(64%,720px);margin:0;padding:.5rem 1rem .55rem;background:rgba(21,24,33,.86);color:#FBF3DE;border-radius:8px;font-family:var(--serif);font-weight:900;font-size:clamp(1rem,1.45vw,1.3rem);line-height:1.55;text-align:center;pointer-events:none}
body[data-ui="auto"] .subtitle{left:calc((100% - clamp(220px,27%,360px) - 20px) / 2)}
.auto-cover,.auto-end{position:absolute;inset:0;display:grid;place-items:center;background:rgba(18,15,11,.45)}
.big-play{display:grid;gap:4px;justify-items:center;background:var(--terra);border-color:var(--terra);color:#FEFCF6;font-family:var(--serif);font-size:1.6rem;padding:1rem 2.2rem;border-radius:10px;box-shadow:4px 4px 0 var(--honey)}
.big-play small{font-family:var(--sans);font-size:.8rem;font-weight:600;opacity:.9}
.auto-end{align-content:center;gap:14px;text-align:center}
.auto-end p{margin:0;font-family:var(--serif);font-weight:900;font-size:1.6rem;color:#FBF3DE}
.auto-end div{display:flex;gap:8px;flex-wrap:wrap;justify-content:center}
.scrub{position:relative;flex:1;min-width:160px;display:flex;align-items:center}
.scrub input{width:100%;accent-color:var(--honey)}
.ticks{position:absolute;left:0;right:0;top:-4px;height:6px;pointer-events:none}
.ticks i{position:absolute;top:0;width:2px;height:6px;background:rgba(239,200,90,.6)}
.time{color:#DCE5DF;font-size:.8rem;font-variant-numeric:tabular-nums;white-space:nowrap}
.chapters{list-style:none;margin:0;padding:0;display:grid;gap:2px;counter-reset:ch}
.chapters li button{width:100%;display:flex;gap:10px;align-items:baseline;text-align:left;background:transparent;border:0;border-radius:6px;color:var(--muted);font-weight:600;font-size:.9rem;padding:.42rem .5rem}
.chapters li button b{font-family:var(--serif);font-size:.82rem;color:var(--faint);min-width:1.6em}
.chapters li.done button{color:var(--ink)}.chapters li.done button b{color:var(--pine)}
.chapters li.now button{background:var(--honey-soft);color:var(--ink);font-weight:800}.chapters li.now button b{color:var(--terra)}
@media(hover:hover) and (pointer:fine){.chapters li button:hover{background:var(--panel);color:var(--ink)}}

/* 引导卡 */
.story{display:flex;flex-direction:column;gap:12px;min-height:0;height:100%}
.steps{display:flex;gap:5px;align-items:center}
.steps i{flex:1;height:5px;border-radius:999px;background:var(--hair)}.steps i.done{background:var(--pine)}.steps i.now{background:var(--honey)}
.kicker{margin:0;color:var(--terra);font-weight:800;font-size:.78rem;letter-spacing:.06em}
.story h2{margin:0;font-family:var(--serif);font-weight:900;font-size:clamp(1.25rem,1.75vw,1.6rem);line-height:1.35}
.story p.body{margin:0;font-size:.95rem;line-height:1.75;color:var(--ink)}
.story p.body em{font-style:normal;background:linear-gradient(transparent 62%,var(--honey) 62%);font-weight:700}
.term{border-left:3px solid var(--honey);background:var(--honey-soft);padding:.5rem .7rem;border-radius:0 8px 8px 0;font-size:.86rem;line-height:1.6}
.term b{font-family:var(--serif)}
.picks{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:8px}
.pick{display:flex;flex-direction:column;gap:6px;align-items:stretch;padding:6px;background:var(--bg);border:1.5px solid var(--hair);color:var(--ink);white-space:normal;font-size:.82rem;line-height:1.3}
.pick canvas{width:100%;aspect-ratio:4/3;border-radius:5px;display:block;background:#2C2721}
.pick.selected{border-color:var(--ink);background:var(--bg);color:var(--ink);box-shadow:3px 3px 0 var(--honey)}
.pick.right{border-color:var(--pine);box-shadow:3px 3px 0 var(--pine)}
.pick.wrong{opacity:.55}
.pick:disabled{cursor:default;color:var(--ink)}
@media(hover:hover) and (pointer:fine){.pick:not(:disabled):not(.selected):hover{border-color:var(--ink);color:var(--ink)}}
.feedback{border-radius:var(--r);padding:.65rem .8rem;font-size:.9rem;line-height:1.6;background:var(--pine-deep);color:#F3EEDF}
.feedback b{font-family:var(--serif);font-size:1.08rem;color:var(--honey);display:block;margin-bottom:2px}
.feedback.wait{background:var(--panel);color:var(--muted);border:1px dashed var(--hair)}.feedback.wait b{color:var(--ink)}
.cta{align-self:flex-start;background:var(--terra);border-color:var(--terra);color:#FEFCF6;font-size:.95rem;padding:.6rem 1.1rem}
.cta.ghost{background:var(--bg);border-color:var(--ink);color:var(--ink)}
.cta-row{display:flex;gap:8px;flex-wrap:wrap;margin-top:auto}
.app-cards{display:grid;gap:7px}
.app-card{display:grid;grid-template-columns:52px minmax(0,1fr);gap:10px;align-items:center;text-align:left;background:var(--bg);border:1.5px solid var(--hair);color:var(--ink);padding:.5rem .6rem;white-space:normal;font-weight:400}
.app-card.selected{border-color:var(--ink);box-shadow:3px 3px 0 var(--honey);background:var(--bg);color:var(--ink)}
.app-card svg{width:52px;height:42px}
.app-card b{font-family:var(--serif);font-size:1rem;font-weight:900;display:block}
.app-card span{font-size:.8rem;color:var(--muted);line-height:1.45;display:block}
@media(hover:hover) and (pointer:fine){.app-card:not(.selected):hover{border-color:var(--ink);color:var(--ink)}}
.now-card{border-radius:var(--r);background:var(--pine-deep);color:#F3EEDF;padding:.8rem .9rem;display:grid;gap:5px}
.now-card small{color:var(--honey);font-weight:800;font-size:.76rem;letter-spacing:.04em}
.now-card b{font-family:var(--serif);font-size:1.25rem;line-height:1.35}
.now-card p{margin:0;font-size:.88rem;line-height:1.65;color:#DCE5DF}

/* 课堂版侧栏 */
.zone-line{position:relative;height:58px;margin:2px 0 0}
.zone-line svg{width:100%;height:100%;display:block;overflow:visible}
.predict{border:1.5px solid var(--ink);border-radius:var(--r);padding:.65rem .75rem;display:grid;gap:7px;background:var(--bg)}
.predict h4{margin:0;font-family:var(--serif);font-size:.98rem;font-weight:900;display:flex;justify-content:space-between;align-items:baseline}
.predict h4 span{font-family:var(--sans);font-size:.72rem;color:var(--terra);font-weight:700}
.chips{display:flex;gap:5px;flex-wrap:wrap}
.chips button{background:var(--panel);border:1.5px solid var(--hair);color:var(--ink);font-size:.8rem;padding:.3rem .62rem}
.chips button.selected{background:var(--ink);border-color:var(--ink);color:var(--honey)}
.verdict{border-radius:var(--r);background:var(--pine-deep);color:#F3EEDF;padding:.6rem .8rem;display:grid;gap:3px}
.verdict small{color:var(--honey);font-weight:700;font-size:.74rem;letter-spacing:.04em}
.verdict b{font-family:var(--serif);font-size:1.18rem;font-weight:900;line-height:1.35}
.verdict p{margin:0;font-size:.8rem;color:#CFD9D2;line-height:1.55}
.verdict.wait{background:var(--panel);color:var(--muted);border:1px dashed var(--hair)}.verdict.wait b{color:var(--ink);font-size:1rem}.verdict.wait p{color:var(--muted)}
.rec-btn{background:var(--terra);border-color:var(--terra);color:#FEFCF6}
.rec-btn:disabled{background:var(--panel);border-color:var(--hair);color:var(--faint)}
table.record td.ok{color:var(--pine);font-weight:800}table.record td.no{color:var(--terra);font-weight:800}
table.record td.k{font-size:.78rem}
.graph{border-top:1px solid var(--hair);padding-top:6px}.graph svg{width:100%;display:block}
.tabs2{display:flex;gap:5px}
.tabs2 button{background:var(--panel);border:1.5px solid var(--hair);color:var(--muted);font-size:.76rem;padding:.26rem .6rem}
.tabs2 button.selected{background:var(--ink);border-color:var(--ink);color:var(--honey)}
.keys{color:#A9BDB1;font-size:.74rem;font-weight:600}

@media (max-width:1180px){.keys{display:none}.ro{min-width:4.8rem;padding:.32rem .6rem}.ro b{font-size:1.3rem}.ro.img{min-width:8rem}}
@media (max-width:860px){
  .subtitle,body[data-ui="auto"] .subtitle{left:8px;right:8px;bottom:8px;top:auto;transform:none;max-width:none;font-size:.92rem;padding:.4rem .6rem}
  .scrub{order:5;flex-basis:100%}
  .app-header{flex-wrap:wrap}.ui-switch{width:100%}.ui-switch button{flex:1;padding:.5rem .2rem}
  .left{grid-template-rows:auto}
  .figure-wrap{display:grid;gap:8px;background:transparent;overflow:visible;border-radius:0;aspect-ratio:auto;position:relative}
  #gl{position:relative;inset:auto;aspect-ratio:1/1;height:auto;border-radius:var(--r);background:#17140F}
  .views{left:8px;right:8px;top:8px}.views button{flex:1;padding:.42rem .2rem}
  .readouts{position:static;box-shadow:none}
  .ro{min-width:0;flex:1}.ro .bar{width:100%}
  .closeup{position:absolute;top:8px;right:8px;bottom:auto;width:40%;box-shadow:none;padding:4px 5px 5px}
  .closeup figcaption{font-size:.66rem;padding:0 1px 3px}.closeup figcaption em,.zoom-tag{display:none}
  body:not([data-ui="guide"]) .closeup{top:44px}
  .ro{padding:.3rem .5rem}.ro b{font-size:1.15rem}.ro small{font-size:.66rem}
  .drag-hint{display:none}
  .story{height:auto}.cta-row{margin-top:4px}
}

/* 录制画幅 */
body.presentation .left{grid-template-rows:minmax(0,1fr)}
body.presentation .views,body.presentation .drag-hint,body.presentation .ui-switch{display:none}
body.presentation .ro small{font-size:.95rem}body.presentation .ro b{font-size:2.3rem}body.presentation .ro.img b{font-size:1.5rem}
body.presentation .ro{min-width:8rem;padding:.6rem 1.1rem}body.presentation .ro .bar{width:9rem;height:10px}body.presentation .ro em{font-size:1.05rem}
body.presentation .closeup{width:440px}body.presentation .closeup figcaption{font-size:1rem}
body.presentation .now-card b{font-size:1.8rem}body.presentation .now-card p{font-size:1.15rem}body.presentation .now-card small{font-size:1rem}
body.presentation.portrait .closeup{width:380px}
body.presentation .subtitle{font-size:2.1rem;max-width:1100px;bottom:28px;padding:.7rem 1.4rem}
body.presentation[data-ui="auto"] .subtitle{left:calc((100% - 440px - 20px) / 2)}
body.presentation .chapters li button{font-size:1.25rem;padding:.55rem .7rem}body.presentation .chapters li button b{font-size:1.1rem}
body.presentation .side h3{font-size:1.5rem}

/* ---------- 圆周角专属 ---------- */
.figure-wrap{background:#1E1A15}
.angle-card{position:absolute;right:12px;top:12px;display:grid;gap:0;background:rgba(254,252,246,.96);border:1.5px solid var(--ink);border-radius:8px;box-shadow:3px 3px 0 var(--honey);pointer-events:none;min-width:9.5rem}
.ac{padding:.4rem .8rem;border-bottom:1px solid var(--hair)}.ac:last-child{border-bottom:0}
.ac small{display:block;font-size:.72rem;font-weight:700;color:var(--muted)}
.ac b{font-family:var(--serif);font-weight:900;font-size:1.7rem;line-height:1.15;font-variant-numeric:tabular-nums}
.ac.c b{color:var(--terra)}.ac.o b{color:var(--pine)}.ac.r b{font-size:1.1rem;color:var(--ink)}
.ac.flash{background:var(--honey-soft)}
.deg-tag{position:absolute;transform:translate(-50%,-50%);pointer-events:none;font-family:var(--serif);font-weight:900;font-size:1.05rem;padding:.05rem .4rem;border-radius:6px;white-space:nowrap}
.deg-tag.c{background:var(--terra);color:#FEFCF6}.deg-tag.o{background:var(--pine);color:#FEFCF6}.deg-tag.x{background:var(--honey);color:var(--ink)}
.pt-tag{position:absolute;transform:translate(-50%,-50%);pointer-events:none;font-family:var(--serif);font-style:italic;font-weight:900;font-size:1.3rem;color:#FEFCF6;text-shadow:0 1px 3px #000,0 0 8px #000}
.proof-steps{list-style:none;margin:0;padding:0;display:grid;gap:6px;counter-reset:ps}
.proof-steps li{position:relative;padding:.45rem .6rem .45rem 2.1rem;border-radius:8px;background:var(--panel);font-size:.88rem;line-height:1.6;color:var(--muted)}
.proof-steps li:before{counter-increment:ps;content:counter(ps);position:absolute;left:.6rem;top:.5rem;width:1.1rem;height:1.1rem;border-radius:50%;background:var(--hair);color:var(--ink);font-size:.72rem;font-weight:800;display:grid;place-items:center}
.proof-steps li.on{background:var(--honey-soft);color:var(--ink)}.proof-steps li.on:before{background:var(--honey)}
.law-card{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);width:min(78%,620px);background:var(--bg);border:2px solid var(--ink);border-radius:10px;box-shadow:5px 5px 0 var(--honey);padding:1.1rem 1.4rem;text-align:center;pointer-events:none}
.law-card small{color:var(--terra);font-weight:800;letter-spacing:.1em}
.law-card b{display:block;font-family:var(--serif);font-weight:900;font-size:clamp(1.15rem,1.9vw,1.6rem);line-height:1.5;margin-top:4px}
.law-card b span{background:linear-gradient(transparent 62%,var(--honey) 62%)}
body[data-ui="auto"] .subtitle{left:50%}
body[data-ui="auto"] .drag-hint{display:none}
.drag-hint{left:12px;right:auto}
.sticker{position:absolute;left:12px;top:56px;background:var(--terra);color:#FEFCF6;font-weight:800;font-size:.82rem;padding:.25rem .7rem;border-radius:999px;pointer-events:none}
@media (max-width:860px){.angle-card{right:8px;top:8px;min-width:0}.ac{padding:.25rem .55rem}.ac b{font-size:1.2rem}.ac.r b{font-size:.9rem}body[data-ui="auto"] .subtitle{left:8px}}
body.presentation .ac b{font-size:2.4rem}body.presentation .ac small{font-size:1rem}body.presentation .ac.r b{font-size:1.5rem}
body.presentation .deg-tag{font-size:1.5rem}body.presentation .pt-tag{font-size:1.9rem}body.presentation .law-card b{font-size:2.1rem}
@media (max-width:860px){.angle-card{position:static;grid-template-columns:repeat(3,minmax(0,1fr));box-shadow:none}.ac{border-bottom:0;border-right:1px solid var(--hair)}.ac:last-child{border-right:0}.ac small{font-size:.66rem}}
body.presentation .sticker{font-size:1.3rem;padding:.4rem 1rem;top:24px;left:24px}