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@media(max-width:350px){.topbar{padding:9px 10px;gap:4px}.brand{font-size:13px;gap:5px}.brand-symbol{width:28px;height:31px;font-size:18px}.brand small{font-size:7px}.tool{font-size:9px;padding:5px}.top-tools #motion-button{max-width:41px}.top-tools [data-action=about]{max-width:36px}.cover-world{height:660px}.cover-copy h1{font-size:38px}.cover-copy .eyebrow{font-size:8px}.cover-copy>p{font-size:15px}.cover-actions{gap:7px}.cover-actions .button{font-size:11px;padding:10px 11px}.cover-meta{font-size:8px}.cover-world .actor{height:32%;bottom:8%}.world-topline{font-size:7px}.story-path{font-size:8px}.story-path>small{font-size:7px;max-width:60px}.desk-object>span:last-child{font-size:11px;padding:5px}.desk-object small{font-size:7px}.paper-tab{font-size:9px;padding:7px 6px}.lesson-world{height:250px}.lesson-world .scene-bubble p{font-size:14px}.lesson-world .scene-bubble{left:46%;width:50%;padding:10px}.worktop{padding:18px 10px 23px}.work-heading h1{font-size:22px}.piano-bench{padding:12px 8px}.melody-strip{gap:11px}.piano-key{height:130px}.black-keys{height:70px}.lesson-actions .button{font-size:11px}.piece>.piece-svg{height:72px}.fabric-box{padding:13px 11px}.rotate-button{min-width:60px}.target-label{font-size:9px;padding:6px 8px}.chapter-heading h1{font-size:24px}.viewfinder{height:350px}.frame-label{font-size:7px}.final-photo{height:370px}.final-photo .actor{height:55%;bottom:18%}.photo-caption{font-size:16px}.photo-caption small{font-size:8px}.invitation-paper h1{font-size:34px}.invitation-paper p{font-size:14px}.invitation-paper>.eyebrow{font-size:8px}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}
.outside-photographer{display:flex;align-items:center;gap:14px;max-width:520px;padding:7px 15px;margin:10px auto 0;background:#ecebd6;border-radius:7px}.outside-photographer>div{height:95px;width:55px;position:relative;flex-shrink:0;overflow:hidden}.outside-photographer .actor{height:105%;bottom:-9%;left:50%}.outside-photographer .actor-name{display:none}.outside-photographer p{margin:0}.outside-photographer strong{display:block;font-size:11px;color:#76815d;font-weight:400}.outside-photographer p>span{font-family:var(--serif);font-size:17px}.outside-photographer+.dialogue-strip{margin-top:10px}
.final-photo .figure,.photo-world:has(.actor-you) .figure{background-image:url('assets/classmates-front-v3.png')}
.final-photo .actor{height:78%}
.photo-world:has(.actor-you) .actor{height:72%}
@media(max-width:680px){.final-photo .actor,.photo-world:has(.actor-you) .actor{height:62%}}
@media(max-width:350px){.final-photo .actor,.photo-world:has(.actor-you) .actor{height:60%}}
@media(max-width:680px){.top-tools .word-prefix{display:none}.top-tools #motion-button,.top-tools [data-action=about]{max-width:none;white-space:nowrap;padding:7px;font-size:11px}}
@media(max-width:350px){.top-tools #motion-button,.top-tools [data-action=about]{padding:5px;font-size:10px}}
.cover-stage{position:relative}
.photo-wall{position:absolute;top:6%;right:5%;width:32%;max-width:440px;z-index:8;padding:10px 12px 9px;background:#faf0d1b8;border:1px solid #c7b88c;border-radius:4px;box-shadow:2px 5px 14px #6e62351c;transform:rotate(.5deg)}
.photo-wall-title{display:block;font:12px var(--serif);letter-spacing:.1em;color:#536749;margin-bottom:10px}.photo-wall-items{display:flex;align-items:start;gap:9px}.wall-photo{position:relative;flex:1;min-width:0;border:0;padding:5px 5px 6px;background:#fff9e9;box-shadow:0 3px 7px #5b503123;transform:rotate(-3deg)}.wall-photo:nth-child(2){transform:rotate(2deg)}.wall-photo:nth-child(3){transform:rotate(-1deg)}.wall-photo:before{content:"";position:absolute;z-index:2;width:28px;height:10px;top:-4px;left:calc(50% - 14px);background:#d3bc8277;transform:rotate(4deg)}.wall-photo:hover{transform:translateY(-3px) rotate(0)}.wall-photo img{width:100%;height:78px;object-fit:contain;background:#e8e6d4}.wall-photo>span{display:block;font-size:10px;line-height:1.7;text-align:center;padding-top:5px;white-space:nowrap}.photo-wall>small{display:block;color:#6c795b;font-size:9px;margin-top:9px}
.class-album-entry{max-width:800px;margin:20px auto 0;padding:20px 18px;background:#fcf4da;border:1px solid #a8ad83;border-radius:8px;text-align:center;box-shadow:1px 3px 0 #94764412}.class-album-entry>span{display:block;margin-bottom:12px;font-size:12px;letter-spacing:.09em;color:#596344}.class-album-entry .album-open-button{max-width:100%;padding:12px 24px;font-weight:600;font-size:16px;white-space:normal}.class-album-entry .album-entry-hint{margin:10px 0 0;font-size:12px;line-height:1.8;color:#596344}.photo-scene>.class-album-entry{max-width:700px;margin-top:25px}
.room-layout .world:has(.desk-objects) .bubble-zhou{left:37%;max-width:29%}.room-layout .world:has(.desk-objects) .bubble-chen{left:61%;max-width:29%}
dialog.real-album{width:min(1080px,calc(100% - 36px));max-width:1080px;max-height:94svh;padding:0 26px;background:#fbf5e3;overscroll-behavior:contain}.album-header{position:sticky;top:0;z-index:3;background:#fbf5e3;display:flex;align-items:center;justify-content:space-between;gap:15px;padding:18px 0 13px;border-bottom:1px solid #d5d2b9}.album-header .eyebrow{font-size:10px}.album-header h2{font-size:27px;margin:5px 0 0;line-height:1.45}.album-close{white-space:nowrap;flex-shrink:0;min-height:44px;font-size:13px}.album-chapters{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin:14px 0}.album-chapters>button{border:1px solid #c6c9aa;border-radius:5px;background:#f5efda;padding:9px 11px;text-align:left;min-height:57px}.album-chapters>button.selected{background:#e3e9ce;border-color:#6c8856}.album-chapters small{display:block;color:#829168;font-size:9px}.album-chapters span{font-size:12px;line-height:1.6}.album-page{margin:16px 0 0;padding:9px 9px 0;background:#fffdf6;border:1px solid #d6cfb4;box-shadow:2px 3px 0 #c8c5a82b}.album-image-stage{display:flex;align-items:center;justify-content:center;min-height:160px;background:#ecebdf}.album-image-stage img{display:block;max-width:100%;width:100%;height:auto;max-height:54svh;object-fit:contain}.album-page figcaption{font-family:var(--serif);font-size:18px;text-align:center;padding:12px 8px;color:#455b3d}.real-album .album-intro{font:16px/1.8 var(--serif);color:#697757;margin:14px 0 5px}.real-album .album-source-note{font-size:11px;color:#7c8566;margin:10px 0 0;line-height:1.7}.real-album .album-last-note{text-align:center;padding:7px 0 0}.real-album .album-last-note p{font:19px/1.8 var(--serif);color:#516d45;margin:8px 0 12px}.album-last-note .button{font-size:14px}.album-controls{position:sticky;bottom:0;z-index:3;display:grid;grid-template-columns:1fr auto 1fr auto;gap:12px;align-items:center;padding:14px 0 18px;background:#fbf5e3;border-top:1px solid #d5d2b9;margin-top:14px}.album-controls .button{font-size:13px;min-height:44px;padding:9px 14px}.album-controls [data-album-action=previous]{justify-self:start}.album-controls [data-album-action=next]{justify-self:end}.album-page-number{font-size:13px;color:#687f53;font-variant-numeric:tabular-nums;white-space:nowrap}.album-return{font-size:12px;white-space:nowrap;margin-left:6px}.album-image-error{padding:30px;font-size:14px;color:#7a765d}
@media(max-width:1000px){.photo-wall{right:3%;width:35%;padding:9px}.photo-wall-items{gap:6px}.wall-photo img{height:65px}.wall-photo>span{font-size:9px}}
@media(max-width:680px){.photo-wall{position:static;width:100%;max-width:none;margin:14px 0 0;padding:15px 13px 12px;transform:none;background:#f1e8cf}.photo-wall-title{font-size:12px;margin-bottom:13px}.photo-wall-items{gap:10px}.wall-photo img{height:76px}.wall-photo>span{font-size:10px}.photo-wall>small{font-size:10px;margin-top:11px}.class-album-entry{padding:11px 12px;margin-top:17px}.class-album-entry>span{font-size:11px}.class-album-entry .album-open-button{width:100%;font-size:15px;padding:12px}.class-album-entry .album-entry-hint{font-size:11px}.room-layout .world:has(.desk-objects) .bubble-zhou,.room-layout .world:has(.desk-objects) .bubble-chen{left:6%;width:87%;max-width:87%}dialog.real-album{width:calc(100% - 18px);max-height:96svh;padding:0 12px}.album-header{padding:12px 0 10px;gap:8px}.album-header .eyebrow{font-size:8px}.album-header h2{font-size:19px;line-height:1.6;margin-top:4px}.album-close{font-size:11px;padding:7px}.album-chapters{gap:5px;margin:10px 0}.album-chapters>button{padding:7px 6px;min-height:70px}.album-chapters span{font-size:10px;line-height:1.7;display:block}.album-chapters small{font-size:8px}.album-page{margin-top:10px;padding:5px 5px 0}.album-image-stage{min-height:100px}.album-image-stage img{max-height:45svh}.album-page figcaption{font-size:16px;padding:10px 5px}.real-album .album-intro{font-size:14px;line-height:1.8;margin-top:11px}.real-album .album-source-note{font-size:10px;line-height:1.8}.album-controls{grid-template-columns:1fr auto 1fr;gap:8px;padding:10px 0 11px;margin-top:10px}.album-controls .button{font-size:11px;min-height:44px;padding:8px 10px}.album-page-number{font-size:12px}.album-return{grid-column:1/-1;justify-self:center;margin:0;min-height:38px;padding:4px;font-size:11px}.real-album .album-last-note p{font-size:16px;margin:10px 0 11px}.album-last-note .button{font-size:12px}.real-album .album-image-error{padding:15px;font-size:12px}}
@media(max-width:350px){.wall-photo img{height:64px}.wall-photo>span{font-size:9px}.album-header h2{font-size:18px}.album-chapters span{font-size:9px}.album-image-stage img{max-height:40svh}.album-controls .button{padding:8px;font-size:10px}.real-album .album-last-note p{font-size:15px}}
.album-ending-last .album-image-stage img{max-height:44svh}.album-ending-last .album-controls{position:static}
@media(max-width:680px){.album-ending-last .album-image-stage img{max-height:34svh}}
@media(max-width:350px){.album-ending-last .album-image-stage img{max-height:32svh}}

.footer>span:only-child{margin-left:auto}

/* 单一声音开关，提示占据自己的位置，不覆盖手机端内容。 */
.music-control{display:flex;flex-direction:column;align-items:center;justify-content:center;max-width:116px;flex-shrink:0}.music-control #sound-button{white-space:nowrap;font-size:12px;min-width:78px}.music-hint{font-size:9px;line-height:1.5;color:#647452;text-align:center;max-width:116px;overflow-wrap:anywhere}.music-control:has(.music-hint:not([hidden])) #sound-button{padding-top:3px;padding-bottom:3px}.topbar{align-items:center}@media(max-width:680px){.music-control{max-width:90px}.music-control #sound-button{font-size:10px;min-width:65px;padding-left:5px;padding-right:5px}.music-hint{font-size:8px;max-width:90px}.topbar{flex-wrap:wrap}.top-tools{margin-left:auto}}@media(max-width:350px){.music-control{max-width:80px}.music-control #sound-button{min-width:60px;font-size:9px}.music-hint{max-width:80px}}