@font-face{font-family:"GF Sans";src:url("fonts/NotoSansSC-subset.woff2") format("woff2");font-weight:100 900;font-display:swap}
@font-face{font-family:"GF Serif";src:url("fonts/NotoSerifSC-subset.woff2") format("woff2");font-weight:100 900;font-display:swap}
:root{
  --bg:#020b13;--ink:#e7f8ff;--mut:#6f94a6;--cyan:#4de3ff;--gold:#ffd27a;--red:#ff5a5f;
  --stage-w:min(100vw,calc(100vh * 16 / 9));--stage-h:min(100vh,calc(100vw * 9 / 16));
  --pad:clamp(18px,2.2vw,34px);
}
*{box-sizing:border-box}
html,body{margin:0;height:100%;background:var(--bg);color:var(--ink);font-family:"GF Sans","Microsoft YaHei",sans-serif;overflow:hidden;-webkit-font-smoothing:antialiased}
button{font:inherit;color:inherit}::selection{background:var(--cyan);color:#02111c}
.shell{position:fixed;inset:0;display:flex;align-items:center;justify-content:center;background:radial-gradient(circle at 50% 35%,#08283a 0,#020b13 62%)}
.stage{position:relative;width:var(--stage-w);height:var(--stage-h);overflow:hidden;background:#020b13;box-shadow:0 0 0 1px rgba(77,227,255,.14),0 30px 120px rgba(0,0,0,.6)}
.slide{position:absolute;inset:0;opacity:0;transform:translate3d(0,26px,0);filter:blur(5px);transition:opacity .62s cubic-bezier(.22,.61,.36,1),transform .82s cubic-bezier(.22,.61,.36,1),filter .62s ease;pointer-events:none;will-change:opacity,transform,filter}
.slide.on{opacity:1;transform:none;filter:none;pointer-events:auto}
.slide:not(.on){visibility:hidden;transition:opacity .45s ease,transform .6s ease,filter .45s ease,visibility 0s .45s}
.slide.on{visibility:visible;transition:opacity .62s cubic-bezier(.22,.61,.36,1),transform .82s cubic-bezier(.22,.61,.36,1),filter .62s ease,visibility 0s}
.frame-page{position:absolute;top:0;left:0;width:1440px;height:810px;border:0;display:block;background:#03101f;z-index:2;transform-origin:top left}
.slide .bg{position:absolute;inset:0;width:100%;height:100%;object-fit:fill;display:block;user-select:none;-webkit-user-drag:none}
.slide:after{content:"";position:absolute;inset:0;z-index:1;background:linear-gradient(180deg,rgba(2,11,19,.36),transparent 16%,transparent 78%,rgba(2,11,19,.45));pointer-events:none;opacity:.4}

/* header */
.top{position:fixed;z-index:150;left:auto;right:max(18px,calc((100vw - var(--stage-w))/2 + 22px));top:62px;height:auto;display:flex;align-items:center;justify-content:flex-end;pointer-events:none}
.brand,.pagecount{display:none!important}
.brand{display:flex;align-items:center;gap:10px;color:#dff8ff;font-size:12px;letter-spacing:.04em;pointer-events:auto}
.brand b{font-weight:500}.brand i{font-style:normal;color:var(--cyan);font-size:8px;letter-spacing:.18em;border-left:1px solid rgba(77,227,255,.35);padding-left:10px}
.top .right{display:flex;align-items:center;gap:8px;pointer-events:auto}
.pagecount{font-family:"Bahnschrift",sans-serif;font-size:9px;letter-spacing:.12em;color:var(--mut);margin-right:6px}.pagecount b{color:var(--cyan);font-size:14px;font-weight:400}
.tbtn{border:1px solid rgba(77,227,255,.25);background:rgba(3,15,25,.72);color:#9adced;font-size:9px;letter-spacing:.06em;padding:6px 9px;cursor:pointer}
.tbtn:hover{border-color:rgba(77,227,255,.6);color:#fff}

/* hotspots */
.hs{position:absolute;border:1px solid transparent;background:transparent;border-radius:2px;cursor:pointer;z-index:20;transition:.2s;padding:0;color:inherit}
.hs:hover,.hs:focus-visible{background:rgba(77,227,255,.07);border-color:rgba(77,227,255,.7);outline:none;box-shadow:0 0 22px rgba(77,227,255,.14)}
.hs[data-tip]:after{content:attr(data-tip);position:absolute;left:50%;bottom:calc(100% + 7px);transform:translateX(-50%) translateY(3px);white-space:nowrap;background:rgba(2,11,19,.94);border:1px solid rgba(77,227,255,.3);padding:4px 7px;font-size:8px;letter-spacing:.06em;color:#bfe9f6;opacity:0;pointer-events:none;transition:.18s;z-index:40}
.hs[data-tip]:hover:after,.hs[data-tip]:focus-visible:after{opacity:1;transform:translateX(-50%)}
.hs.gold:hover{border-color:rgba(255,210,122,.85);background:rgba(255,210,122,.07)}
.hs.red:hover{border-color:rgba(255,90,95,.85);background:rgba(255,90,95,.07)}
.hs.pulse{animation:hsPulse 2.4s ease-in-out infinite}
@keyframes hsPulse{0%,100%{box-shadow:0 0 0 0 rgba(77,227,255,0)}50%{box-shadow:0 0 0 4px rgba(77,227,255,.08),0 0 26px rgba(77,227,255,.15)}}

/* P4 dynamic title + mode buttons */
.p4-title{position:absolute;left:34%;top:6.2%;width:32%;height:7.6%;background:rgba(2,11,19,.9);border:1px solid rgba(77,227,255,.28);z-index:25;display:flex;align-items:center;justify-content:center;font-family:"GF Serif",serif;font-size:clamp(14px,1.7vw,26px);letter-spacing:.08em;color:#fff;text-shadow:0 0 20px rgba(77,227,255,.25)}
.p4-modes{position:absolute;left:34%;bottom:17.5%;width:38%;height:3.8%;display:grid;grid-template-columns:repeat(5,1fr);gap:4px;z-index:25}
.p4-modes .hs{position:relative;inset:auto;width:auto;height:auto;font-size:clamp(6px,.55vw,9px);padding:2px 1px;color:#9fc8d8;border-color:rgba(77,227,255,.18);background:rgba(3,15,25,.72);white-space:nowrap;overflow:hidden}
.p4-modes .hs.on{color:#04121e;background:var(--cyan);border-color:var(--cyan)}
.p4-filters{position:absolute;left:43.5%;bottom:13.6%;width:13%;height:2.8%;display:flex;gap:4px;z-index:25}
.p4-filters .hs{position:relative;inset:auto;flex:1;font-size:clamp(5px,.5vw,8px);padding:2px;color:#8fb6c7;border-color:rgba(77,227,255,.18);background:rgba(3,15,25,.72)}
.p4-filters .hs.on{color:#02111c;background:var(--gold);border-color:var(--gold)}

/* P5 + P6 + P7 + P8 overlay chips */
.chiprow{position:absolute;z-index:25;display:flex;gap:5px;align-items:center}
.chiprow button{border:1px solid rgba(77,227,255,.24);background:rgba(3,15,25,.82);color:#a5c8d8;font-size:clamp(6px,.6vw,9px);padding:5px 7px;letter-spacing:.04em;cursor:pointer}
.chiprow button:hover,.chiprow button.on{color:#02111c;background:var(--cyan);border-color:var(--cyan)}
.p5-tools{right:4.4%;bottom:6.8%}
.p6-tools{right:4.4%;top:9.2%}
.p6-tools button{font-size:clamp(5px,.55vw,8px);padding:4px 6px}
.p7-tools{left:10.6%;bottom:7.6%}
.p8-tools{right:4.4%;top:9.2%}

/* info sheet */
.sheet{position:fixed;z-index:240;right:max(18px,calc((100vw - var(--stage-w))/2 + 24px));top:70px;bottom:70px;width:min(390px,34vw);background:rgba(3,15,25,.97);border:1px solid rgba(77,227,255,.35);box-shadow:0 30px 90px rgba(0,0,0,.6);transform:translateX(calc(100% + 40px));transition:transform .35s;display:flex;flex-direction:column;pointer-events:auto}
.sheet.open{transform:none}
.sheet .sh{display:flex;align-items:flex-start;justify-content:space-between;padding:17px 18px 12px;border-bottom:1px solid rgba(77,227,255,.18)}
.sheet .sh .k{font-size:8px;letter-spacing:.16em;color:var(--cyan);margin-bottom:5px}
.sheet .sh h3{margin:0;font-family:"GF Serif",serif;font-size:21px;font-weight:500;line-height:1.25;color:#f3fbff}
.sheet .x{border:0;background:transparent;color:#6f9bb3;font-size:22px;line-height:1;padding:0}
.sheet .x:hover{color:#fff}
.sheet .sb{padding:16px 18px;overflow:auto;color:#a8c6d5;font-size:11px;line-height:1.85}
.sheet .sb b{color:#fff;font-weight:500}.sheet .sb .num{font-family:"Bahnschrift",sans-serif;color:var(--gold);font-size:26px;line-height:1.1;display:block;margin:4px 0}
.sheet .sb .row{display:flex;justify-content:space-between;gap:12px;border-bottom:1px solid rgba(77,227,255,.12);padding:7px 0}.sheet .sb .row span:last-child{color:#e8f8ff}
.sheet .sb .note{font-size:9px;color:#5f8a9d;margin-top:10px;line-height:1.7}

/* P5 calculator modal */
.calc{position:fixed;inset:0;z-index:260;background:rgba(1,7,12,.76);backdrop-filter:blur(5px);display:none;align-items:center;justify-content:center;padding:20px}
.calc.open{display:flex}
.calc-card{position:relative;width:min(560px,100%);background:#04131f;border:1px solid rgba(77,227,255,.4);padding:22px;box-shadow:0 30px 100px rgba(0,0,0,.65)}
.calc-card h3{font-family:"GF Serif",serif;font-weight:500;font-size:26px;margin:0 0 4px}.calc-card .sub{font-size:9px;color:#6f9bb3;margin-bottom:16px}
.calc-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px 14px}.calc-grid label{display:block;font-size:9px;color:#8fb3c3;margin-bottom:5px}
.calc-grid input[type=range]{width:100%;accent-color:var(--cyan)}.calc-grid output{font-family:"Bahnschrift",sans-serif;color:#e9faff;font-size:11px}
.calc-result{display:grid;grid-template-columns:1fr 1fr 1fr;gap:1px;background:rgba(77,227,255,.18);border:1px solid rgba(77,227,255,.18);margin:16px 0 12px}
.calc-result div{background:rgba(3,15,25,.95);padding:10px}.calc-result span{display:block;font-size:8px;color:#6f9bb3;letter-spacing:.06em}.calc-result b{display:block;font-family:"Bahnschrift",sans-serif;font-size:21px;color:var(--gold);font-weight:400;margin-top:3px}
.calc-actions{display:flex;justify-content:flex-end;gap:8px}.calc-actions button{border:1px solid rgba(77,227,255,.35);background:transparent;color:#9adced;padding:8px 12px;font-size:10px}.calc-actions button.primary{background:var(--cyan);color:#02111c;border-color:var(--cyan)}

/* nav */
.dots{position:fixed;z-index:180;left:50%;bottom:16px;transform:translateX(-50%);display:flex;gap:7px}
.dots button{width:16px;height:3px;border:0;padding:0;background:rgba(111,155,179,.35);cursor:pointer;transition:.2s}
.dots button.on{background:var(--cyan);width:26px;box-shadow:0 0 10px rgba(77,227,255,.45)}
.next{display:none!important}
.page-nav{position:fixed!important;right:24px;bottom:8px;z-index:9999!important;display:flex!important;flex-direction:column!important;gap:8px!important;visibility:visible!important;opacity:1!important;display:flex;gap:10px;align-items:center}
.page-circle{width:54px;height:54px;border-radius:50%;border:1px solid rgba(95,231,255,.7);background:rgba(3,18,30,.82);color:#eaf8ff;font-size:7.5px;letter-spacing:.08em;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;cursor:pointer;box-shadow:0 0 18px rgba(95,231,255,.2);transition:.2s}
.page-circle:hover{background:rgba(95,231,255,.18);border-color:#9ff3ff}.page-circle:disabled{opacity:.28;cursor:default}.page-circle svg{width:14px;height:14px}.page-circle span{line-height:1}
.next:hover{background:rgba(77,227,255,.15)}.next.up svg{transform:rotate(180deg)}.next svg{width:18px;height:18px}

/* coach */
.coach{position:fixed;z-index:200;left:max(18px,calc((100vw - var(--stage-w))/2 + 22px));bottom:30px;max-width:390px;display:flex;gap:9px;align-items:flex-start;padding:8px 10px;background:rgba(3,15,25,.9);border:1px solid rgba(255,210,122,.38);box-shadow:0 12px 30px rgba(0,0,0,.35);backdrop-filter:blur(8px)}
.coach[hidden]{display:none}.coach .n{flex:0 0 auto;width:20px;height:20px;border:1px solid rgba(255,210,122,.55);color:var(--gold);font-family:"Bahnschrift",sans-serif;font-size:8px;display:flex;align-items:center;justify-content:center}
.coach .txt{font-size:9px;line-height:1.55;color:#c6e2ef}.coach .txt b{display:block;color:#fff;font-weight:500;margin-bottom:1px}.coach .txt span{color:#6f9bb3}
.coach .x{border:0;background:transparent;color:#6f9bb3;font-size:13px;padding:0 0 0 4px;margin-left:auto}

/* tour */
.tour{position:fixed;inset:0;z-index:300;background:rgba(1,7,12,.8);backdrop-filter:blur(7px);display:flex;align-items:center;justify-content:center;padding:20px;opacity:0;pointer-events:none;transition:.3s}
.tour.open{opacity:1;pointer-events:auto}
.tour-card{width:min(600px,100%);background:linear-gradient(180deg,#082338,#03101c);border:1px solid rgba(77,227,255,.38);padding:26px 26px 20px;position:relative;box-shadow:0 40px 120px rgba(0,0,0,.7)}
.tour-card .kick{font-size:8px;letter-spacing:.18em;color:var(--cyan);margin-bottom:8px}
.tour-card h2{font-family:"GF Serif",serif;font-weight:500;font-size:clamp(24px,3vw,34px);line-height:1.18;margin:0 0 9px;letter-spacing:-.02em}
.tour-card p{font-size:11px;line-height:1.8;color:#8fb3c4;margin:0 0 18px;max-width:470px}
.tour-steps{display:grid;gap:1px;background:rgba(77,227,255,.16);border:1px solid rgba(77,227,255,.16);margin-bottom:16px}
.tour-step{display:grid;grid-template-columns:32px 1fr;gap:10px;background:#03111e;padding:11px 12px}
.tour-step i{font-style:normal;font-family:"Bahnschrift",sans-serif;font-size:9px;color:var(--gold);border:1px solid rgba(255,210,122,.4);width:23px;height:23px;display:flex;align-items:center;justify-content:center}
.tour-step b{font-size:11px;font-weight:500;display:block;margin-bottom:2px}.tour-step span{font-size:9px;color:#789eb0;line-height:1.6}
.tour-foot{display:flex;align-items:center;justify-content:space-between;gap:12px}.tour-foot small{font-size:8px;color:#557f94}
.tour-start{border:1px solid var(--cyan);background:rgba(77,227,255,.12);color:#e8fcff;padding:9px 18px;font-size:10px;letter-spacing:.08em}.tour-start:hover{background:var(--cyan);color:#02111c}
.tour-x{position:absolute;right:10px;top:8px;border:0;background:transparent;color:#6f9bb3;font-size:20px}
body.lock{overflow:hidden}
.method{position:fixed;inset:0;z-index:270;background:rgba(1,7,12,.7);display:none;align-items:center;justify-content:center;padding:20px}.method.open{display:flex}
.method-card{width:min(620px,100%);background:#03121f;border:1px solid rgba(77,227,255,.35);padding:22px;position:relative}.method-card h3{font-family:"GF Serif",serif;font-weight:500;margin:0 0 8px;font-size:22px}.method-card p{font-size:10px;line-height:1.9;color:#8fb3c4;margin:0}.method-card .x{position:absolute;right:10px;top:8px;border:0;background:transparent;color:#6f9bb3;font-size:20px}

@media (max-width:760px){
  .top{height:46px;left:12px;right:12px}.brand{font-size:10px}.brand i{display:none}.pagecount{font-size:8px}
  .coach{left:12px;right:12px;bottom:56px;max-width:none}.coach .txt{font-size:8px}
  .next{right:14px;bottom:58px;width:36px;height:36px}.dots{bottom:14px}
  .sheet{right:12px;left:12px;width:auto;top:58px;bottom:58px}
  .p4-modes .hs,.p4-filters .hs{font-size:5px}
  .calc-card{padding:16px}.calc-grid{grid-template-columns:1fr}
  .calc-result{grid-template-columns:1fr}
  .tour-card{padding:20px 16px}
}
@media (prefers-reduced-motion:reduce){*{scroll-behavior:auto!important}.slide{transition:none}.hs.pulse{animation:none}}

/* visible interactive affordances for image-based chapters */
.calc-open{position:absolute;z-index:26;left:4.5%;bottom:7.2%;border:1px solid rgba(255,210,122,.6);background:rgba(3,15,25,.9);color:#ffd27a;font-size:clamp(7px,.72vw,11px);letter-spacing:.06em;padding:7px 11px;cursor:pointer}
.calc-open:hover{background:rgba(255,210,122,.16);color:#fff}
.p7-cell{border:1px solid rgba(77,227,255,.14)!important;background:rgba(77,227,255,.035)!important}
.p7-cell:hover{border-color:rgba(255,210,122,.85)!important;background:rgba(255,210,122,.07)!important}
.p8-card{border:1px dashed rgba(77,227,255,.28)!important}
.p8-card:hover{border-style:solid!important;border-color:rgba(77,227,255,.85)!important}
.p6-point{border-radius:50%!important;background:rgba(77,227,255,.07)!important;border:1px solid rgba(77,227,255,.55)!important}
.p6-point:before{content:"";position:absolute;inset:34%;border-radius:50%;background:#4de3ff;box-shadow:0 0 12px #4de3ff}

/* P5 extended */
.calc-modes{display:flex;gap:4px;margin:0 0 10px}
.calc-modes button{border:1px solid rgba(77,227,255,.28);background:transparent;color:#8fb6c7;font-size:9px;padding:6px 10px}
.calc-modes button.on{background:var(--cyan);color:#02111c;border-color:var(--cyan)}
.calc-route{display:grid;grid-template-columns:1fr 28px 1fr;gap:6px;margin:0 0 12px;align-items:center}
.calc-route input{width:100%;background:rgba(255,255,255,.04);border:1px solid rgba(77,227,255,.2);color:#dff8ff;font-size:10px;padding:7px 8px;min-width:0}
.calc-route button{border:1px solid rgba(77,227,255,.3);background:transparent;color:var(--cyan);height:30px}
.calc-counters{border-top:1px solid rgba(77,227,255,.14);margin-top:12px;padding-top:10px}
.cc-head{display:flex;justify-content:space-between;font-size:8px;letter-spacing:.06em;color:#6f9bb3;margin-bottom:8px}
.cc-grid{display:grid;grid-template-columns:1fr 1fr;gap:8px 14px}
.cc-grid label{font-size:8px;color:#8fb3c3;display:block}
.cc-grid output{float:right;color:var(--gold);font-family:"Bahnschrift",sans-serif;font-size:9px}
.cc-grid input{width:100%;accent-color:var(--gold);height:14px}
.calc-result b.neg{color:var(--red)}
.calc.neg .calc-result div:last-child b{color:var(--red)}
.share{position:fixed;inset:0;z-index:320;background:rgba(1,7,12,.82);backdrop-filter:blur(7px);display:none;align-items:center;justify-content:center;padding:20px}
.share.open{display:flex}
.share-card{position:relative;background:#04131f;border:1px solid rgba(77,227,255,.4);padding:14px;max-height:calc(100vh - 30px);overflow:auto}
.share-card .share-k{font-size:8px;letter-spacing:.16em;color:var(--cyan);margin-bottom:8px}
.share-card canvas{display:block;width:min(300px,60vw);height:auto;border:1px solid rgba(77,227,255,.18)}
.share-actions{display:flex;justify-content:flex-end;gap:8px;margin-top:10px}
.share-actions button{border:1px solid rgba(77,227,255,.35);background:transparent;color:#9adced;padding:7px 12px;font-size:10px}
.share-actions button.primary{background:var(--cyan);color:#02111c;border-color:var(--cyan)}

.story-status{position:absolute;z-index:27;left:50%;bottom:3.4%;transform:translateX(-50%);max-width:64%;min-height:22px;display:flex;align-items:center;gap:7px;background:rgba(3,15,25,.94);border:1px solid rgba(77,227,255,.35);padding:5px 10px;font-size:clamp(6px,.66vw,10px);line-height:1.4;color:#c8e6f2;box-shadow:0 8px 22px rgba(0,0,0,.35);pointer-events:none}
.story-status:before{content:"";width:5px;height:5px;border-radius:50%;background:var(--cyan);box-shadow:0 0 9px var(--cyan);flex:0 0 auto}
.story-status b{color:#fff;font-weight:500}
.p6-corridor{border-radius:8px!important;background:rgba(77,227,255,.025)!important;border:1px solid rgba(77,227,255,.22)!important;transform:rotate(-12deg)}
.p6-corridor:hover,.p6-corridor.active{border-color:rgba(255,210,122,.9)!important;background:rgba(255,210,122,.09)!important}
.p7-theme{background:rgba(77,227,255,.035)!important;border:1px solid rgba(77,227,255,.12)!important;border-radius:0!important}
.p7-theme:hover,.p7-theme.active{border-color:rgba(255,210,122,.85)!important;background:rgba(255,210,122,.07)!important}
.p7-rowmark{position:absolute;z-index:21;background:rgba(255,210,122,.08);border-top:1px solid rgba(255,210,122,.7);border-bottom:1px solid rgba(255,210,122,.7);pointer-events:none;display:none}
.p7-colmark{position:absolute;z-index:21;background:rgba(255,210,122,.07);border-left:1px solid rgba(255,210,122,.7);border-right:1px solid rgba(255,210,122,.7);pointer-events:none;display:none}
.p7-drawer{position:fixed;z-index:250;left:0;right:0;bottom:0;height:300px;background:rgba(3,15,25,.98);border-top:1px solid rgba(77,227,255,.4);transform:translateY(100%);transition:.35s;display:flex;flex-direction:column;padding:16px max(18px,calc((100vw - 1200px)/2)) 20px}
.p7-drawer.open{transform:none}
.p7-drawer .dh{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:10px}.p7-drawer .dh h3{font-family:"GF Serif",serif;font-weight:500;margin:0;font-size:22px}.p7-drawer .dh small{display:block;color:#6f9bb3;font-size:8px;margin-top:4px}
.p7-drawer .dx{border:0;background:transparent;color:#6f9bb3;font-size:20px}
.p7-bars{display:grid;grid-template-columns:1fr 1fr;gap:6px 24px;overflow:auto;padding-right:6px}
.p7-bar{display:grid;grid-template-columns:120px 1fr 42px;gap:8px;align-items:center;font-size:9px;color:#a8c6d5}
.p7-bar i{display:block;height:7px;background:linear-gradient(90deg,#4de3ff,#2178ff)}
.p7-bar em{font-style:normal;font-family:"Bahnschrift",sans-serif;color:#ffd27a;text-align:right}
.p8-card.active{border-style:solid!important;border-color:rgba(255,210,122,.9)!important}
.p8-timeline{background:rgba(77,227,255,.04)!important;border:1px solid rgba(77,227,255,.2)!important}
.p8-timeline.active{border-color:rgba(255,210,122,.9)!important;background:rgba(255,210,122,.08)!important}

.p7-cell.active{border-color:rgba(255,210,122,.95)!important;background:rgba(255,210,122,.1)!important}
.p7-bar.on span,.p7-bar.on em{color:#ffd27a}
.p7-bar.on i{box-shadow:0 0 12px rgba(77,227,255,.35)}
.p8-cond.active{border-color:rgba(255,210,122,.85)!important;background:rgba(255,210,122,.07)!important}
.p8-evidence:hover{border-color:rgba(255,210,122,.8)!important}
.slide[data-page="6"] .story-status{bottom:10.2%}
.slide[data-page="7"] .story-status{bottom:10.2%}
@media (max-width:760px){.story-status{max-width:92%;font-size:7px;bottom:8.5%!important}}

.calc.neg .calc-card{border-color:rgba(255,90,95,.7)}
.calc.neg .calc-result div:last-child b{color:var(--red)}
.cc-formula{font-size:8px;color:#6f9bb3;line-height:1.6;margin-top:8px;min-height:13px}
.ai-badge{position:fixed;left:50%;bottom:2px;transform:translateX(-50%);z-index:260;font-size:7px;line-height:1.2;color:#6f9bb3;background:rgba(2,11,19,.82);border:1px solid rgba(95,231,255,.16);padding:2px 6px;letter-spacing:.06em;pointer-events:none;white-space:nowrap}

/* 背景音乐开关：原创生成式环境音乐 */
.bgm-btn{position:fixed;left:8px;bottom:36px;z-index:270;width:24px;height:24px;border-radius:50%;border:1px solid rgba(95,231,255,.32);background:rgba(2,13,22,.88);display:flex;align-items:center;justify-content:center;padding:0;cursor:pointer;box-shadow:0 0 0 1px rgba(95,231,255,.04);transition:.2s}
.bgm-btn:hover{border-color:rgba(95,231,255,.8);box-shadow:0 0 12px rgba(95,231,255,.28)}
.bgm-btn .eq{display:flex;align-items:flex-end;gap:2px;height:11px}
.bgm-btn .eq i{display:block;width:2px;height:4px;background:#5fe7ff;opacity:.55;border-radius:1px;transition:.2s}
.bgm-btn.on .eq i{opacity:1;animation:bgmEq 1.05s ease-in-out infinite}
.bgm-btn.on .eq i:nth-child(2){animation-delay:.16s}
.bgm-btn.on .eq i:nth-child(3){animation-delay:.32s}
@keyframes bgmEq{0%,100%{height:4px}50%{height:11px}}

.bgm-btn:not(.on){animation:bgmPulse 2.8s ease-out infinite}
@keyframes bgmPulse{0%{box-shadow:0 0 0 0 rgba(95,231,255,0)}40%{box-shadow:0 0 0 4px rgba(95,231,255,.15)}100%{box-shadow:0 0 0 8px rgba(95,231,255,0)}}
.bgm-btn .eq i{width:3px}

/* 自动播放被拦截时的音乐提示 */
.bgm-prompt{position:fixed;left:50%;bottom:24px;transform:translateX(-50%);z-index:268;display:flex;align-items:center;gap:9px;background:rgba(3,18,30,.95);border:1px solid rgba(95,231,255,.55);padding:6px 8px 6px 13px;color:#d9f3ff;font:9px "Sans","Microsoft YaHei",sans-serif;letter-spacing:.04em;box-shadow:0 10px 28px rgba(0,0,0,.55);white-space:nowrap}
.bgm-prompt:before{content:"";width:6px;height:6px;border-radius:50%;background:#5fe7ff;box-shadow:0 0 8px #5fe7ff;animation:bgmDot 1.6s ease-in-out infinite}
.bgm-prompt button{border:1px solid rgba(255,210,122,.7);background:rgba(255,210,122,.14);color:#ffd27a;font:9px "Sans","Microsoft YaHei",sans-serif;padding:4px 9px;cursor:pointer;letter-spacing:.04em}
.bgm-prompt button:hover{background:#ffd27a;color:#03131f}
@keyframes bgmDot{0%,100%{opacity:.4}50%{opacity:1}}