.video-fullscreen-surface{display:block;width:100%;min-width:0;min-height:0;overflow:hidden;border-radius:18px;background:#000}.video-fullscreen-content{display:grid;grid-template-rows:minmax(0,1fr) auto;width:100%;min-width:0;min-height:0;overflow:hidden;border-radius:18px;background:#000}.video-fullscreen-stage{display:grid;width:100%;min-width:0;min-height:0;overflow:hidden;background:#000}.video-fullscreen-stage>video{display:block;width:100%;height:auto;max-height:68dvh;border:0;background:#000;object-fit:contain}.video-fullscreen-toolbar{display:flex;flex:0 0 auto;align-items:center;justify-content:center;min-height:54px;padding:8px max(12px,env(safe-area-inset-right)) max(8px,env(safe-area-inset-bottom)) max(12px,env(safe-area-inset-left));background:#000}.video-fullscreen-toggle{display:inline-flex;align-items:center;justify-content:center;min-width:180px;min-height:42px;gap:9px;padding:9px 18px;border:1px solid rgb(255 255 255 / 32%);border-radius:999px;color:#fff;background:#ffffff1f;font:inherit;font-weight:800;line-height:1;cursor:pointer;touch-action:manipulation}.video-fullscreen-toggle:hover{background:#fff3}.video-fullscreen-toggle:focus-visible{outline:3px solid #ffd86b;outline-offset:2px}.video-fullscreen-toggle:disabled{cursor:wait;opacity:.72}.video-fullscreen-surface.is-video-fullscreen,.video-fullscreen-surface:fullscreen,.video-fullscreen-surface:-webkit-full-screen{position:fixed!important;inset:0!important;z-index:2147483647!important;width:100vw!important;width:100dvw!important;max-width:none!important;height:100vh!important;height:100dvh!important;max-height:none!important;margin:0!important;padding:0!important;border:0!important;border-radius:0!important;box-shadow:none!important;transform:none;background:#000}.video-fullscreen-surface.is-video-fullscreen .video-fullscreen-content,.video-fullscreen-surface:fullscreen .video-fullscreen-content,.video-fullscreen-surface:-webkit-full-screen .video-fullscreen-content{width:100%;height:100%;border-radius:0}.video-fullscreen-surface.is-video-fullscreen .video-fullscreen-stage,.video-fullscreen-surface:fullscreen .video-fullscreen-stage,.video-fullscreen-surface:-webkit-full-screen .video-fullscreen-stage{width:100%;height:100%;min-height:0;aspect-ratio:auto;border:0;border-radius:0}.video-fullscreen-surface.is-video-fullscreen .video-fullscreen-stage>video,.video-fullscreen-surface:fullscreen .video-fullscreen-stage>video,.video-fullscreen-surface:-webkit-full-screen .video-fullscreen-stage>video{width:100%;height:100%;max-height:none;object-fit:contain}@media(max-width:900px)and (orientation:portrait){.video-fullscreen-surface.is-landscape-fallback .video-fullscreen-content{position:absolute;inset:50% auto auto 50%;width:100dvh!important;height:100dvw!important;transform:translate(-50%,-50%) rotate(90deg)!important;transform-origin:center}}@media(max-width:640px){.video-fullscreen-toolbar{min-height:48px;padding-top:6px}.video-fullscreen-toggle{min-width:154px;min-height:38px;padding:7px 14px;font-size:.88rem}}.youtube-controlled-player{display:block;width:100%;min-width:0;min-height:0;overflow:hidden;background:#000}.youtube-player-viewport{position:relative;width:100%;min-width:0;min-height:0;overflow:hidden;aspect-ratio:16 / 9;background:#000}.youtube-player-host,.youtube-video-embed{position:absolute;inset:0;display:block;width:100%;height:100%;border:0;background:#000}.youtube-video-embed{pointer-events:none}.youtube-player-poster{position:absolute;inset:0;z-index:1;display:block;width:100%;height:100%;object-fit:cover;background:#000;pointer-events:none;-webkit-user-select:none;user-select:none}.youtube-player-hit-target{position:absolute;inset:0;z-index:2;display:flex;align-items:center;justify-content:center;width:100%;height:100%;padding:0;border:0;color:#fff;background:transparent;cursor:pointer;touch-action:manipulation}.youtube-player-center-icon{display:grid;place-items:center;width:64px;height:64px;padding-left:3px;border:2px solid rgb(255 255 255 / 78%);border-radius:50%;background:#0000009e;box-shadow:0 5px 20px #00000059}.youtube-player-center-icon svg{width:34px;height:34px;fill:currentColor}.youtube-player-status{position:absolute;left:50%;top:50%;z-index:3;transform:translate(-50%,-50%);padding:8px 12px;border-radius:999px;color:#fff;background:#000000bd;font-size:.86rem;font-weight:800;pointer-events:none}.youtube-player-controls{position:absolute;right:0;bottom:0;left:0;z-index:4;display:grid;grid-template-columns:38px minmax(80px,1fr) auto 38px minmax(64px,92px);align-items:center;justify-content:center;gap:10px;min-height:50px;padding:7px 12px;color:#fff;background:#090909}.youtube-player-controls button{display:inline-flex;align-items:center;justify-content:center;width:38px;height:38px;padding:7px;border:0;border-radius:50%;color:#fff;background:transparent;cursor:pointer;touch-action:manipulation}.youtube-player-controls button:hover,.youtube-player-controls button:focus-visible{background:#ffffff29}.youtube-player-controls button:focus-visible,.youtube-player-hit-target:focus-visible,.youtube-player-controls input:focus-visible{outline:3px solid #ffd86b;outline-offset:1px}.youtube-player-controls button:disabled,.youtube-player-hit-target:disabled,.youtube-player-controls input:disabled{cursor:default;opacity:.58}.youtube-player-controls svg{width:24px;height:24px;fill:currentColor}.youtube-player-volume-stroke{fill:none;stroke:currentColor;stroke-linecap:round;stroke-width:1.8}.youtube-player-progress,.youtube-player-volume{width:100%;margin:0;accent-color:#ef4d45;cursor:pointer}.youtube-player-time{min-width:84px;font-size:.76rem;font-variant-numeric:tabular-nums;text-align:center;white-space:nowrap}.video-fullscreen-surface.is-video-fullscreen .youtube-controlled-player,.video-fullscreen-surface:fullscreen .youtube-controlled-player,.video-fullscreen-surface:-webkit-full-screen .youtube-controlled-player{height:100%}.video-fullscreen-surface.is-video-fullscreen .youtube-player-viewport,.video-fullscreen-surface:fullscreen .youtube-player-viewport,.video-fullscreen-surface:-webkit-full-screen .youtube-player-viewport{height:100%;aspect-ratio:auto}@media(max-width:520px){.youtube-player-controls{grid-template-columns:38px minmax(70px,1fr) auto 38px;gap:7px;padding-inline:8px}.youtube-player-volume{display:none}.youtube-player-center-icon{width:54px;height:54px}}@font-face{font-family:EBookUiSans;src:local("Inter"),local("Arial"),local("Roboto"),local("Noto Sans");font-style:normal;font-weight:400;font-display:swap;unicode-range:U+0000-024F,U+1E00-1EFF,U+2000-2E7F}@font-face{font-family:EBookTextbookLatin;src:url(/assets/Andika-Bold-DU9TL9lB.woff2) format("woff2");font-style:normal;font-weight:700;font-display:block;unicode-range:U+0000-024F,U+1E00-1EFF,U+2000-206F,U+20A0-20CF,U+2100-214F,U+2190-21FF,U+2200-22FF,U+FEFF,U+FFFD}@font-face{font-family:EBookKaiTi;src:url(/assets/FandolKai-Regular-ad1YEaQO.woff2) format("woff2"),local("KaiTi"),local("SimKai"),local("楷体"),local("STKaiti"),local("Kaiti SC"),local("Kaiti TC");font-style:normal;font-weight:400;font-display:block;unicode-range:U+2E80-2EFF,U+2F00-2FDF,U+3000-303F,U+3100-312F,U+31A0-31BF,U+31C0-31EF,U+3400-4DBF,U+4E00-9FFF,U+F900-FAFF,U+FF00-FFEF}:root{--edcloud-yellow: #ffc329;--edcloud-yellow-soft: #fff2b8;--edcloud-orange: #f5822a;--edcloud-orange-deep: #c85a16;--edcloud-cream: #fff9e8;--edcloud-ink: #233449;--edcloud-muted: #6c7784;--edcloud-teal: #0b9288;--edcloud-card: rgba(255,255,255,.92);--edcloud-textbook-font: "EBookTextbookLatin", "EBookKaiTi", "KaiTi", "SimKai", "楷体", "STKaiti", "Kaiti SC", serif;font-family:var(--edcloud-textbook-font);color:var(--edcloud-ink);background:#ffca4f}*{box-sizing:border-box}html,body,#root{margin:0;width:100%;height:100%;overflow:hidden}button,input,select,textarea{font:inherit}.visually-hidden{position:absolute!important;width:1px!important;height:1px!important;padding:0!important;margin:-1px!important;overflow:hidden!important;clip:rect(0,0,0,0)!important;white-space:nowrap!important;border:0!important}.edcloud-bulb{width:54px;height:54px;display:inline-grid;place-items:center;flex:0 0 auto;background:transparent;filter:drop-shadow(0 5px 8px rgba(100,55,12,.18));transform:rotate(-2deg)}.edcloud-bulb.compact{width:34px;height:34px;filter:none}.edcloud-bulb img{display:block;width:100%;height:100%;object-fit:contain}.edcloud-dialog-kicker{display:flex;align-items:center;gap:12px;padding-right:54px}.edcloud-dialog-kicker small,.info-dialog-heading small{color:var(--edcloud-orange-deep);font-size:12px;font-weight:950;letter-spacing:.12em;text-transform:uppercase}.reader{position:relative;width:100%;height:var(--reader-viewport-height, 100dvh);overflow:hidden;overscroll-behavior:none;-webkit-user-select:none;user-select:none;background-color:#ffca4f;background-image:url(/reader-art/reader-forest-strip.png);background-position:center bottom;background-repeat:repeat-x;background-size:auto clamp(150px,32vh,400px);font-family:var(--edcloud-textbook-font);font-weight:700;font-synthesis:weight}.menu-trigger{position:fixed;z-index:30;top:max(14px,env(safe-area-inset-top));left:max(14px,env(safe-area-inset-left));width:46px;height:46px;display:grid;place-items:center;padding:5px;border:1px solid rgba(245,130,42,.28);border-radius:16px;background:#fff9e8eb;color:var(--edcloud-orange);box-shadow:0 10px 30px #23344926;cursor:pointer;opacity:.78;-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);transition:opacity .18s ease,transform .18s ease,box-shadow .18s ease}.menu-trigger:hover,.menu-trigger:focus-visible{opacity:1;transform:translateY(-2px) rotate(-1deg);box-shadow:0 14px 32px #23344933}.menu-trigger .edcloud-bulb{width:34px;height:34px}.effects-lively .menu-trigger .edcloud-bulb img{animation:edcloud-bulb-image-glow 2.8s ease-in-out infinite}.ba-return-trigger{position:fixed;z-index:30;top:max(14px,env(safe-area-inset-top));right:max(14px,env(safe-area-inset-right));min-height:46px;display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:0 15px 0 11px;border:1px solid rgba(11,146,136,.28);border-radius:16px;background:#f7fffcf0;color:#087d75;box-shadow:0 10px 30px #23344926;font:inherit;font-size:12px;font-weight:900;text-align:center;cursor:pointer;-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);transition:transform .18s ease,box-shadow .18s ease,background .18s ease}.ba-return-trigger:hover,.ba-return-trigger:focus-visible{outline:none;background:#fff;transform:translateY(-2px);box-shadow:0 14px 32px #23344933}.ba-return-trigger svg{width:19px;height:19px;display:block;overflow:visible;fill:none;stroke:currentColor;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;pointer-events:none}.book-stage{position:relative;z-index:1;width:100%;height:100%;display:flex;align-items:center;justify-content:center;padding:2px;overflow:hidden;touch-action:none;perspective:1800px}.book-stage:after{content:"";position:absolute;z-index:0;left:50%;bottom:1.5%;width:min(82vw,1320px);height:9%;transform:translate(-50%);border-radius:50%;background:radial-gradient(ellipse at center,rgba(32,55,60,.34),rgba(32,55,60,.12) 44%,transparent 72%);filter:blur(16px);pointer-events:none}.book-viewport{position:relative;z-index:1;display:flex;flex:0 0 auto;align-items:center;justify-content:center;transform-origin:center center;will-change:transform}.source-switch-cover{position:fixed;z-index:18;inset:0;display:flex;align-items:center;justify-content:center;overflow:hidden;padding:2px;pointer-events:none}.source-switch-cover>div{display:flex;flex:0 0 auto;overflow:hidden;filter:drop-shadow(0 22px 28px rgba(30,45,52,.25))}.source-switch-cover img{display:block;flex:0 0 auto;object-fit:fill;background:#fff}.real-flip-book{position:relative;flex:0 0 auto;min-width:0!important;min-height:0!important;margin:0;filter:drop-shadow(0 5px 5px rgba(24,38,47,.2)) drop-shadow(0 30px 36px rgba(24,38,47,.3));touch-action:none!important}.real-flip-book .stf__wrapper{position:relative;width:100%!important;height:100%!important;padding-bottom:0!important;overflow:hidden}.real-flip-book .stf__block{width:100%!important;height:100%!important;max-width:100%;max-height:100%;overflow:hidden;contain:layout paint;isolation:isolate;touch-action:none!important}.real-flip-book .stf__item{backface-visibility:hidden;-webkit-backface-visibility:hidden}.real-flip-book.is-turning .stf__item{will-change:transform,clip-path}.real-flip-book.is-turning :is(.stf__outerShadow,.stf__innerShadow,.stf__hardShadow,.stf__hardInnerShadow){will-change:transform,clip-path,opacity}.engine-page{width:100%;height:100%;overflow:hidden;background:#fff}.engine-page-placeholder{width:100%;height:100%;background:#f7f4eb}.pdf-page{position:relative;width:100%;height:100%;min-width:0;min-height:0;display:grid;place-items:center;overflow:hidden;background-color:#fff;background-position:center;background-repeat:no-repeat;background-size:100% 100%;border:0}.pdf-page .page-preview{position:absolute;inset:0;z-index:1;display:block;width:100%;height:100%;object-fit:fill;background:#fff;pointer-events:none}.pdf-page canvas{position:absolute;inset:0;z-index:2;display:block;width:100%;height:100%;max-width:none;max-height:none;object-fit:fill;background:transparent;opacity:0;transition:opacity .1s ease}.pdf-page.ready canvas{opacity:1}.page-left{box-shadow:inset -25px 0 34px -28px #1c3846b8,inset 0 -2px #1d2f361f}.page-right{box-shadow:inset 25px 0 34px -28px #1c3846b8,inset 0 -2px #1d2f361f}.page-loading{position:absolute;inset:0;z-index:4;width:100%;height:100%;display:grid;place-items:center;padding:24px;border:0;background:linear-gradient(110deg,#f3f0e8 20%,#fbfaf5,#f3f0e8 64%);background-size:240% 100%;color:#667b84;font-size:12px;font-weight:750;text-align:center;animation:reader-page-placeholder 1.15s ease-in-out infinite}.pdf-page.failed{background:#f7f4eb}button.page-loading{cursor:pointer;touch-action:manipulation}.pdf-page.failed .page-loading{animation:none}.pdf-page.ready .page-loading{display:none}@keyframes reader-page-placeholder{0%{background-position:100% 0}to{background-position:-100% 0}}.reader-interaction-layer{position:absolute;inset:0;z-index:8;pointer-events:none}.reader-speech-hotspot{position:absolute;pointer-events:auto;cursor:pointer;touch-action:manipulation;-webkit-tap-highlight-color:transparent}.reader-speech-hotspot.transparent{padding:0;border:0;border-radius:5px;background:transparent;color:transparent}.reader-speech-hotspot.transparent:focus-visible{outline:3px solid #04a69c;outline-offset:2px;background:#04a69c1f}.reader-speech-hotspot.transparent.page-link:focus-visible{outline-color:#2477c9;background:#2477c924}.reader-speech-hotspot.transparent.karaoke:focus-visible{outline-color:#8058cf;background:#8058cf24}.reader-speech-hotspot.audio-icon{--hotspot-ring: #62e5ff;display:grid;place-items:center;min-width:0;min-height:0;padding:0;isolation:isolate;overflow:visible;border:max(1px,calc(2px * var(--reader-authoring-scale, 1))) solid rgba(255,255,255,.96);border-radius:50%;background:radial-gradient(circle at 38% 28%,#fffdf0 0 9%,#fff2a3 22%,#ffc329 55%,#078fc9 145%);color:#86450b;box-shadow:inset 0 2px 4px #ffffff94,0 0 9px #ffd341bd,0 5px 15px #08415e66}.reader-speech-hotspot.audio-icon:active{transform:scale(.93)}.reader-speech-hotspot.info-icon{--hotspot-accent: #7657c7;--hotspot-ring: #ffd75a;--hotspot-shadow: rgba(83, 54, 157, .42);display:grid;place-items:center;min-width:0;min-height:0;padding:0;isolation:isolate;overflow:visible;border:max(1px,calc(2px * var(--reader-authoring-scale, 1))) solid rgba(255,255,255,.96);border-radius:50%;background:radial-gradient(circle at 38% 28%,#fffdf0 0 9%,#fff2a3 22%,#ffc329 55%,var(--hotspot-accent) 145%);color:#86450b;box-shadow:inset 0 max(1px,calc(2px * var(--reader-authoring-scale, 1))) max(2px,calc(4px * var(--reader-authoring-scale, 1))) #ffffff9e,inset 0 calc(-2px * var(--reader-authoring-scale, 1)) calc(5px * var(--reader-authoring-scale, 1)) #9d4b0729,0 0 calc(8px * var(--reader-authoring-scale, 1)) #ffd341cc,0 calc(5px * var(--reader-authoring-scale, 1)) calc(14px * var(--reader-authoring-scale, 1)) var(--hotspot-shadow)}.reader-speech-hotspot:is(.audio-icon,.info-icon,.video-icon,.tool-icon):after{content:"";position:absolute;left:50%;top:50%;width:max(28px,100%);height:max(28px,100%);transform:translate(-50%,-50%);border-radius:50%}.reader-speech-hotspot.info-icon:active{transform:scale(.93)}.reader-speech-hotspot.draft-audio{border:2px dashed #d68819;background:#ffc14729}.reader-speech-hotspot.audio-icon.draft-audio{border-style:solid;background:#c98522;opacity:.9}.reader-speech-hotspot.info-icon.draft-audio{border-style:solid;background:radial-gradient(circle at 38% 28%,#fffdf0 0 9%,#fff2a3 22%,#ffc329 55%,var(--hotspot-accent) 145%);opacity:.74}.reader-speech-hotspot.info-icon.information{--hotspot-accent: #f05f58;--hotspot-shadow: rgba(169, 51, 45, .4)}.reader-speech-hotspot.info-icon.passage{--hotspot-accent: #3474ca;--hotspot-shadow: rgba(36, 76, 147, .42)}.info-bulb-image{display:block;width:80%;height:80%;object-fit:contain;pointer-events:none}.reader-speech-hotspot.video-icon{--hotspot-ring: #ff9dcc;display:grid;place-items:center;min-width:0;min-height:0;padding:0;isolation:isolate;overflow:visible;border:max(1px,calc(2px * var(--reader-authoring-scale, 1))) solid rgba(255,255,255,.96);border-radius:36% 46% 38% 48%;background:radial-gradient(circle at 31% 22%,rgba(255,255,255,.48),transparent 27%),linear-gradient(145deg,#ff7a82,#ed4d91 48%,#6a5ad7);color:#fff;box-shadow:inset 0 2px 4px #ffffff6b,inset 0 -4px 8px #591f7e2e,0 0 10px #ff69a399,0 6px 17px #71246c6b}.reader-speech-hotspot.video-icon:active{transform:scale(.93)}.video-icon-svg{width:74%;height:74%;display:block;overflow:visible;fill:none;stroke-linecap:round;stroke-linejoin:round;transform-origin:center}.video-icon-screen{fill:#fff3;stroke:#fffffff5;stroke-width:1.55}.video-icon-play{fill:#fff;stroke:#71246c59;stroke-width:.55;transform-box:fill-box;transform-origin:center}.video-icon-spark{fill:#ffe276;stroke:#7b43006b;stroke-width:.5;filter:drop-shadow(0 0 2px rgba(255,232,129,.9));transform-box:fill-box;transform-origin:center}.reader-speech-hotspot.tool-icon{--hotspot-ring: #55ead5;display:grid;place-items:center;min-width:0;min-height:0;padding:0;isolation:isolate;overflow:visible;border:max(1px,calc(2px * var(--reader-authoring-scale, 1))) solid rgba(255,255,255,.96);border-radius:34% 43% 36% 46%;background:radial-gradient(circle at 32% 22%,rgba(255,255,255,.44),transparent 25%),linear-gradient(145deg,#43dbc0,#0b98b5 48%,#5758d7);color:#fff;box-shadow:inset 0 2px 4px #ffffff6b,inset 0 -4px 8px #1d25872e,0 0 10px #37d9c39e,0 6px 16px #1d468b6b}.reader-speech-hotspot.tool-icon:active{transform:scale(.93)}.reader-speech-hotspot:is(.audio-icon,.info-icon,.video-icon,.tool-icon){transition:transform .2s cubic-bezier(.2,.9,.25,1.25),filter .18s ease,box-shadow .2s ease;animation:edcloud-hotspot-arrive .46s cubic-bezier(.16,.9,.24,1.18) both}.reader-speech-hotspot:is(.audio-icon,.info-icon,.video-icon,.tool-icon):hover,.reader-speech-hotspot:is(.audio-icon,.info-icon,.video-icon,.tool-icon):focus-visible{outline:none;filter:saturate(1.12) brightness(1.04);transform:translateY(-2px) scale(1.06)}@keyframes edcloud-hotspot-arrive{0%{opacity:0;transform:scale(.5) rotate(-16deg);filter:brightness(1.35)}68%{opacity:1;transform:scale(1.12) rotate(3deg)}to{opacity:1;transform:scale(1) rotate(0);filter:brightness(1)}}.tool-icon-svg{width:64%;height:64%;display:block;overflow:visible;fill:none;stroke-linecap:round;stroke-linejoin:round}.tool-icon-tile{fill:#fffffff5;stroke:#ffffffb8;stroke-width:.65;transform-box:fill-box;transform-origin:center}.tool-icon-tile-two{fill:#fff09a}.tool-icon-tile-three{fill:#c8fff6}.tool-icon-spark{fill:#ffcb35;stroke:#7b43008a;stroke-width:.55;transform-box:fill-box;transform-origin:center}.reader-answer-drawing{position:absolute;inset:0;z-index:1;width:100%;height:100%;overflow:visible;pointer-events:none}.reader-colour-shape{position:absolute;z-index:1;box-sizing:border-box;border:2px solid;pointer-events:none;transform-origin:center}.reader-answer-toggle{position:absolute;z-index:4;min-width:max(28px,calc(38px * var(--reader-authoring-scale, 1)));min-height:max(24px,calc(25px * var(--reader-authoring-scale, 1)));padding:calc(3px * var(--reader-authoring-scale, 1)) calc(7px * var(--reader-authoring-scale, 1));transform:translate(-100%);border:max(1px,calc(1.5px * var(--reader-authoring-scale, 1))) solid white;border-radius:999px;background:#e88722;color:#fff;box-shadow:0 3px 10px #76410c52;font-size:max(8px,calc(11px * var(--reader-authoring-scale, 1)));font-weight:900;pointer-events:auto;touch-action:manipulation;cursor:pointer;-webkit-tap-highlight-color:transparent}.reader-answer-toggle.open{width:max(11px,calc(18px * var(--reader-authoring-scale, 1)));min-width:max(11px,calc(18px * var(--reader-authoring-scale, 1)));height:max(11px,calc(18px * var(--reader-authoring-scale, 1)));min-height:max(11px,calc(18px * var(--reader-authoring-scale, 1)));padding:0;transform:translate(32%,-58%);border-width:max(1px,calc(1px * var(--reader-authoring-scale, 1)));border-radius:50%;background:#9b5a1e;font-size:max(7px,calc(9px * var(--reader-authoring-scale, 1)));line-height:1}.reader-answer-toggle.open:after{content:"";position:absolute;inset:-8px;border-radius:50%}.reader-answer-content{position:absolute;inset:0;z-index:1;min-width:100%;min-height:100%;display:grid;place-items:center;overflow:auto;padding:8px;border:2px solid #f0a34d;border-radius:9px;background:#fffae2f5;color:#58350f;box-shadow:0 5px 16px #5b360e38;font-size:clamp(9px,1.4vw,15px);line-height:1.35;pointer-events:auto;-webkit-user-select:text;user-select:text}.reader-answer-content.reader-answer-content-region{inset:auto;min-width:0;min-height:0;overflow:hidden;padding:calc(2px * var(--reader-authoring-scale, 1)) calc(4px * var(--reader-authoring-scale, 1));border-width:max(1px,calc(1px * var(--reader-authoring-scale, 1)));border-radius:calc(5px * var(--reader-authoring-scale, 1));box-shadow:0 2px 7px #5b360e29}.reader-answer-audio{--karaoke-base-color: #58350f;--karaoke-fill-color: #178d84;--karaoke-done-color: #178d84;appearance:none;cursor:pointer;text-align:center}.reader-answer-audio .karaoke-done{color:var(--karaoke-done-color)}.reader-answer-content p{margin:0;padding:0;white-space:pre-wrap}.reader-answer-content ul{margin:0;padding-left:16px;white-space:pre-wrap}.reader-answer-content strong{font-size:inherit}.reader-answer-content img{width:100%;height:100%;object-fit:contain}.reader-answer-list{max-width:100%;display:flex;align-items:flex-start;justify-content:center;gap:.35em .8em;white-space:pre-wrap}.reader-answer-list.vertical{flex-direction:column}.reader-answer-list.horizontal{flex-flow:row wrap}.reader-answer-list>span{display:block;min-width:0}.reader-answer-calculation-content{overflow:auto}.reader-calculation-answer{width:100%;max-width:100%;display:flex;align-items:center;justify-content:center;gap:.8em 1.2em}.reader-calculation-answer.vertical{flex-direction:column}.reader-calculation-answer.horizontal{flex-flow:row wrap;align-items:flex-start}.reader-calculation-block{width:max-content;max-width:100%;min-width:4ch;display:grid;align-content:center;padding:.18em .3em;font-variant-numeric:tabular-nums lining-nums}.reader-calculation-row{width:100%;min-width:0;display:grid;grid-template-columns:1.3em minmax(1ch,auto);align-items:baseline;justify-content:stretch;gap:.18em;border-radius:.24em;text-align:right;line-height:1.2;transition:color .12s ease,background-color .12s ease,box-shadow .12s ease}.reader-calculation-row.rule-before{margin-top:.08em;padding-top:.16em;border-top:.11em solid currentColor;border-radius:0 0 .24em .24em}.reader-calculation-row>strong{min-width:0;font:inherit;font-weight:700;letter-spacing:.015em;white-space:pre}.reader-calculation-operator{min-width:1.3em;text-align:center}.reader-calculation-karaoke-token{color:inherit}.reader-long-division-block{grid-template-columns:max-content max-content;grid-template-rows:auto auto;align-items:baseline;justify-items:end;gap:.08em .18em}.reader-long-division-value{min-width:1.4em;padding:.04em .18em;border-radius:.22em;font:inherit;font-weight:700;letter-spacing:.015em;line-height:1.2;text-align:right;white-space:pre;transition:color .12s ease,background-color .12s ease,box-shadow .12s ease}.reader-long-division-value.quotient{grid-column:2;grid-row:1}.reader-long-division-value.divisor{grid-column:1;grid-row:2}.reader-long-division-value.dividend{grid-column:2;grid-row:2;min-width:2.2em;padding:.16em .24em .04em .42em;border-top:.11em solid currentColor;border-left:.11em solid currentColor;border-radius:.65em 0 0}.reader-long-division-complete{display:grid;grid-template-columns:max-content max-content;grid-template-rows:auto auto;align-items:start;justify-content:center;overflow-x:auto;font-variant-numeric:tabular-nums lining-nums;line-height:1.12}.reader-long-division-quotient{grid-column:2;display:grid;grid-template-columns:repeat(var(--calculation-digits),1ch);justify-items:center;padding:0 .28em .12em .38em;border-radius:.22em}.reader-long-division-quotient>strong{font:inherit;font-weight:900}.reader-long-division-divisor{grid-column:1;grid-row:2;align-self:start;padding:.2em .3em 0 0;border-radius:.22em;font:inherit;font-weight:850}.reader-long-division-work{grid-column:2;grid-row:2;min-width:calc(var(--calculation-digits, 1) * 1ch);padding:.16em .28em .04em .38em;border-top:.11em solid currentColor;border-left:.11em solid currentColor;border-top-left-radius:.55em}.reader-long-division-dividend,.reader-long-division-work-row{display:grid;grid-template-columns:repeat(var(--calculation-digits),1ch);min-width:calc(var(--calculation-digits) * 1ch);text-align:right}.reader-long-division-dividend{border-radius:.22em;font:inherit;font-weight:850;letter-spacing:0}.reader-long-division-work-row>span{min-width:0;text-align:right;white-space:nowrap}.reader-long-division-work-row.partial{padding-top:.1em}.reader-long-division-work-row.product{padding-top:.08em}.reader-long-division-work-row.rule>span{min-height:.15em;border-top:.1em solid currentColor}.reader-long-division-work-row.remainder{padding-top:.06em;font-weight:900}.math-fraction-solution{display:grid;gap:.3em;max-width:100%;padding:.12em;overflow-x:auto;font-variant-numeric:tabular-nums lining-nums}.math-fraction-step{display:grid;grid-template-columns:max-content minmax(0,1fr);align-items:center;gap:.42em;min-width:max-content}.math-fraction-step-prefix{color:#9a5918;font-size:.62em;font-weight:900;white-space:nowrap}.math-fraction-expression{display:inline-flex;align-items:center;flex-wrap:wrap;gap:.12em .24em;min-height:2.35em}.math-fraction-token.operator{padding-inline:.12em;font-weight:900}.math-fraction-number,.math-mixed-number{display:inline-flex;align-items:center;gap:.08em;vertical-align:middle;white-space:nowrap}.math-mixed-whole,.math-fraction-sign{font-weight:900}.math-fraction-stack{display:inline-grid;grid-template-rows:auto .08em auto;justify-items:stretch;align-items:center;min-width:1.35em;line-height:1;text-align:center}.math-fraction-numerator,.math-fraction-denominator{padding:.05em .16em;font-size:.72em;font-weight:850}.math-fraction-bar{min-width:100%;height:.08em;background:currentColor}.inline-textbook-fraction{display:inline-flex;align-items:center;gap:.12em;vertical-align:middle;white-space:nowrap;line-height:1;margin:.08em .06em;font-variant-numeric:tabular-nums lining-nums}.karaoke-word.karaoke-fraction{display:inline-block;vertical-align:middle}.karaoke-word.karaoke-fraction.karaoke-active{background-image:none;color:var(--karaoke-fill-color, #178d84);-webkit-text-fill-color:currentColor}.standalone-fraction-answer{display:flex;flex-wrap:wrap;align-items:center;justify-content:center;gap:.3em .65em;max-width:100%;font-variant-numeric:tabular-nums lining-nums}.standalone-fraction-answer.vertical{flex-direction:column}.standalone-fraction-answer .math-fraction-expression{min-height:1.7em;flex-wrap:nowrap;gap:.08em}.reader-calculation-row.karaoke-row-done,.reader-long-division-value.karaoke-row-done,.reader-long-division-quotient.karaoke-row-done,.reader-long-division-divisor.karaoke-row-done,.reader-long-division-dividend.karaoke-row-done{color:var(--karaoke-done-color, #178d84)}.reader-long-division-quotient.karaoke-row-active,.reader-long-division-divisor.karaoke-row-active,.reader-long-division-dividend.karaoke-row-active,.reader-calculation-row.karaoke-row-active,.reader-long-division-value.karaoke-row-active{background:#178d841f;box-shadow:0 0 0 .12em #178d841f}.interaction-notice{position:fixed;z-index:90;top:max(16px,env(safe-area-inset-top));left:50%;width:min(560px,calc(100vw - 110px));padding:12px 18px;transform:translate(-50%);border:1px solid rgba(11,83,91,.12);border-radius:14px;background:#0f364af0;color:#fff;box-shadow:0 12px 34px #0b2b3a40;font-size:13px;font-weight:800;text-align:center;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px)}.page-jump-lock{position:fixed;z-index:39;inset:0;display:grid;place-items:start center;padding-top:max(16px,env(safe-area-inset-top));background:#fff0;cursor:progress;pointer-events:auto}.page-jump-notice{min-height:44px;max-width:min(560px,calc(100vw - 110px));display:flex;align-items:center;justify-content:center;gap:10px;padding:11px 18px;border:1px solid rgba(255,255,255,.18);border-radius:14px;background:#0f364af5;color:#fff;box-shadow:0 12px 34px #0b2b3a47;font-size:13px;font-weight:850;text-align:center;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px)}.page-jump-notice>span{flex:0 0 17px;width:17px;height:17px;border:2px solid rgba(255,255,255,.38);border-top-color:#fff;border-radius:50%;animation:spin .7s linear infinite}.karaoke-strip{position:fixed;z-index:39;left:50%;bottom:max(18px,env(safe-area-inset-bottom));width:min(780px,calc(100vw - 32px));display:grid;grid-template-columns:minmax(0,1fr) 38px;gap:12px;padding:15px 16px 16px 20px;transform:translate(-50%);border:1px solid rgba(255,255,255,.18);border-radius:20px;background:#122235f0;color:#fff;box-shadow:0 18px 48px #04162357;-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px)}.karaoke-strip>div{min-width:0;display:grid;gap:6px}.karaoke-strip small{color:#b9a7ff;font-size:10px;font-weight:900;letter-spacing:.12em;text-transform:uppercase}.karaoke-strip p{--karaoke-base-color: rgba(255,255,255,.82);--karaoke-fill-color: #ffe978;--karaoke-done-color: #ffe978;margin:0;font-size:clamp(17px,2.2vw,25px);font-weight:750;line-height:1.55;white-space:pre-wrap;overflow-wrap:anywhere}.karaoke-word{position:relative;border-radius:.28em;box-decoration-break:clone;-webkit-box-decoration-break:clone;color:inherit}.karaoke-word.karaoke-han{border-radius:.16em}.karaoke-word.karaoke-active{background-image:linear-gradient(90deg,var(--karaoke-fill-color, #178d84) 0%,var(--karaoke-fill-color, #178d84) var(--karaoke-progress, 0%),var(--karaoke-base-color, #294a60) var(--karaoke-progress, 0%),var(--karaoke-base-color, #294a60) 100%);background-repeat:no-repeat;background-size:100% 100%;background-clip:text;-webkit-background-clip:text;color:transparent;-webkit-text-fill-color:transparent;will-change:background-image}.karaoke-word.karaoke-alias.karaoke-active{background-image:none;color:var(--karaoke-fill-color, #178d84);-webkit-text-fill-color:currentColor}.karaoke-strip p>span{padding:2px 1px;color:var(--karaoke-base-color)}.karaoke-strip p>span.karaoke-done{color:var(--karaoke-done-color)}.karaoke-strip>button{width:36px;height:36px;display:grid;place-items:center;padding:0;border:1px solid rgba(255,255,255,.28);border-radius:50%;background:#ffffff1a;color:#fff;font-size:23px;line-height:1;cursor:pointer}.karaoke-inline{--karaoke-base-color: #294a60;--karaoke-fill-color: #178d84;--karaoke-done-color: #178d84}.karaoke-inline .karaoke-word{padding:1px 0}.karaoke-inline .karaoke-done{color:var(--karaoke-done-color)}.passage-dialog .karaoke-inline,.vocabulary-dialog .karaoke-inline,.info-dialog .karaoke-inline{--karaoke-fill-color: #c2410c;--karaoke-done-color: #c2410c}.passage-dialog .karaoke-inline .karaoke-word,.vocabulary-dialog .karaoke-inline .karaoke-word,.info-dialog .karaoke-inline .karaoke-word{padding-inline:2px;margin-inline:-2px}.reader-audio-button{min-height:42px;display:inline-flex;align-items:center;justify-content:center;gap:9px;padding:0 15px;border:1px solid rgba(200,90,22,.18);border-radius:14px;background:var(--edcloud-orange);color:#fff;box-shadow:0 7px 18px #c85a162e;font-size:13px;font-weight:900;text-align:center;cursor:pointer;transition:transform .16s ease,box-shadow .16s ease,background .16s ease}.reader-audio-button:hover:not(:disabled),.reader-audio-button:focus-visible:not(:disabled){outline:none;transform:translateY(-2px);box-shadow:0 10px 24px #c85a1640}.reader-audio-button[data-audio-state=playing]{background:var(--edcloud-teal);border-color:#0b928847;box-shadow:0 0 #0b928847;animation:edcloud-audio-pulse 1.8s ease-out infinite}.reader-audio-button[data-audio-state=paused]{background:#6955aa;border-color:#6955aa40}.reader-audio-button:disabled{background:#d6d9dc;border-color:transparent;color:#717b82;box-shadow:none;cursor:not-allowed}.reader-audio-button.compact{width:42px;height:42px;min-height:42px;padding:0;border-radius:13px}.reader-audio-glyph{width:18px;display:inline-grid;place-items:center;font-family:ui-sans-serif,system-ui,sans-serif;font-size:14px;line-height:1}.reader-audio-button.compact .reader-audio-glyph{width:auto}.reader-audio-controls{display:inline-flex;align-items:center;justify-content:flex-end;gap:8px;flex-wrap:wrap}.reader-audio-restart{min-height:42px;display:inline-flex;align-items:center;justify-content:center;gap:7px;padding:0 13px;border:1px solid rgba(11,146,136,.28);border-radius:14px;background:#fffffff5;color:#087f79;box-shadow:0 6px 16px #0b5b551a;font-size:12px;font-weight:900;text-align:center;cursor:pointer;transition:transform .16s ease,border-color .16s ease,box-shadow .16s ease,background .16s ease}.reader-audio-restart>span:first-child{font-family:ui-sans-serif,system-ui,sans-serif;font-size:20px;line-height:1}.reader-audio-restart:hover,.reader-audio-restart:focus-visible{outline:none;border-color:var(--edcloud-teal);background:#effbf7;transform:translateY(-2px) rotate(-1deg);box-shadow:0 9px 20px #0b5b5526}@keyframes edcloud-audio-pulse{0%,to{box-shadow:0 0 #0b928847}45%{box-shadow:0 0 0 8px #0b928800}}.reader-status{position:fixed;z-index:20;top:50%;left:50%;width:min(440px,calc(100vw - 36px));display:grid;place-items:center;gap:12px;padding:30px;transform:translate(-50%,-50%);border-radius:24px;background:#ffffffeb;box-shadow:0 24px 60px #1432402e;text-align:center}.reader-status p{margin:0;color:#6d808c;line-height:1.5}.reader-status.error strong{color:#9c4439}.reader-status>button{min-height:44px;display:inline-flex;align-items:center;justify-content:center;padding:0 22px;border:0;border-radius:999px;background:#0a8f88;color:#fff;font:inherit;font-weight:850;text-align:center;cursor:pointer}.reader-status>button:hover{background:#087b75}.spinner{width:35px;height:35px;border:4px solid #dceae8;border-top-color:#0a8f88;border-radius:50%;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.panel-backdrop{position:fixed;inset:0;z-index:40;border:0;background:#0a1e2c57;-webkit-backdrop-filter:blur(3px);backdrop-filter:blur(3px)}.side-menu{--reader-menu-icon-color: #c8752d;--reader-menu-icon-surface: #fff3df;position:fixed;z-index:50;top:0;left:0;bottom:0;width:min(430px,92vw);padding:max(24px,env(safe-area-inset-top)) 22px 28px;overflow-y:auto;background:#ffd674;border-right:1px solid rgba(200,117,45,.2);box-shadow:20px 0 55px #081f2d40;animation:slide-in .24s cubic-bezier(.2,.8,.2,1)}@keyframes slide-in{0%{transform:translate(-100%)}}.menu-heading{display:flex;align-items:flex-start;justify-content:space-between;gap:14px;margin-bottom:20px}.menu-heading div{min-width:0;display:grid;gap:4px}.menu-heading small,.dskp-card small{color:var(--edcloud-orange-deep);font-weight:950;letter-spacing:.11em}.menu-heading strong{color:var(--edcloud-ink);font-size:21px;line-height:1.25}.menu-heading span{color:var(--edcloud-muted);font-size:12px}.menu-brand-heading{display:grid;grid-template-columns:54px minmax(0,1fr) 42px;align-items:center}.menu-heading>button,.dialog-close{flex:0 0 42px;width:42px;height:42px;display:grid;place-items:center;appearance:none;padding:0;border-radius:50%;border:1px solid rgba(245,130,42,.22);background:#ffffffdb;color:var(--edcloud-ink);cursor:pointer;transition:transform .16s ease,background .16s ease}.menu-heading>button:hover,.menu-heading>button:focus-visible,.dialog-close:hover,.dialog-close:focus-visible{background:#fff;transform:rotate(4deg) scale(1.04)}.popup-close-icon{width:20px;height:20px;display:block;overflow:visible;pointer-events:none}.page-scrubber{display:grid;gap:9px;margin:0 0 18px;padding:15px 16px;border:1px solid rgba(200,117,45,.18);border-radius:20px;background:#fff;box-shadow:0 8px 22px #5d451c0f}.page-scrubber h3{margin:0;color:var(--edcloud-orange-deep);font-size:11px;font-weight:950;letter-spacing:.08em;text-transform:uppercase}.page-scrubber>div{display:flex;align-items:baseline;justify-content:space-between;gap:12px}.page-scrubber strong{color:#0a514f;font-size:15px}.page-scrubber span,.page-scrubber>small{color:#6d818b;font-size:11px}.page-scrubber input[type=range]{width:100%;height:24px;margin:0;accent-color:var(--edcloud-orange);cursor:ew-resize;touch-action:pan-x}.reader-menu-sections{display:grid;gap:14px}.reader-menu-section{display:grid;gap:8px}.reader-menu-section>h3{display:flex;align-items:center;gap:9px;margin:0;color:var(--edcloud-ink);font-size:13px;font-weight:900}.reader-menu-section>h3>span{width:27px;height:27px;display:grid;place-items:center;border-radius:9px;background:#fff;color:var(--reader-menu-icon-color);font-size:9px;letter-spacing:.03em;transform:rotate(-2deg)}.reader-menu-sound>h3>span{background:#fff;color:var(--reader-menu-icon-color)}.reader-menu-display>h3>span{background:#fff;color:var(--reader-menu-icon-color)}.reader-menu-actions{display:grid;gap:8px;padding-left:10px;border-left:2px dashed rgba(255,255,255,.92)}.reader-menu-sound .reader-menu-actions,.reader-menu-display .reader-menu-actions{border-left-color:#ffffffeb}.reader-menu-actions>button{display:grid;grid-template-columns:58px 1fr;align-items:center;min-height:58px;padding:0;overflow:hidden;border:1px solid rgba(200,117,45,.14);border-radius:17px;background:#fff;color:var(--edcloud-ink);box-shadow:0 5px 14px #2334490d;text-align:left;font-weight:780;cursor:pointer;transition:transform .16s ease,box-shadow .16s ease,border-color .16s ease}.reader-menu-actions>button:not(.reader-interaction-guide-button):not(.reader-effect-toggle){column-gap:10px;padding-right:12px}.reader-menu-actions>button:hover,.reader-menu-actions>button:focus-visible{border-color:#f5822a6b;outline:none;transform:translate(3px);box-shadow:0 8px 20px #23344917}.reader-menu-actions>button>span{display:grid;place-items:center;align-self:stretch;background:var(--reader-menu-icon-surface);color:var(--reader-menu-icon-color);font-weight:950}.reader-menu-sound .reader-menu-actions>button>span{background:var(--reader-menu-icon-surface);color:var(--reader-menu-icon-color)}.reader-menu-display .reader-menu-actions>button>span{background:var(--reader-menu-icon-surface);color:var(--reader-menu-icon-color)}.menu-control-row{min-height:66px;display:grid;grid-template-columns:58px minmax(0,1fr);overflow:hidden;border:1px solid rgba(200,117,45,.14);border-radius:17px;background:#fff;color:var(--edcloud-ink);box-shadow:0 5px 14px #2334490d}.menu-control-row>span:first-child{display:grid;place-items:center;background:var(--reader-menu-icon-surface);color:var(--reader-menu-icon-color);font-weight:950}.reader-menu-display .menu-control-row>span:first-child{background:var(--reader-menu-icon-surface);color:var(--reader-menu-icon-color)}.menu-control-content{min-width:0;display:grid;align-content:center;gap:7px;padding:10px 12px}.menu-control-content>strong{font-size:13px}.menu-control-content select{width:100%;min-height:36px;padding:0 10px;border:1px solid rgba(11,146,136,.22);border-radius:10px;background:#fbfffe;color:var(--edcloud-ink);font:inherit;font-weight:800;cursor:pointer}.zoom-control{min-width:0;display:grid;grid-template-columns:34px minmax(54px,1fr) 34px 34px;align-items:center;gap:5px}.zoom-control button{width:34px;height:34px;display:grid;place-items:center;padding:0;border:1px solid rgba(200,117,45,.22);border-radius:9px;background:#fff8ee;color:var(--reader-menu-icon-color);font-size:19px;font-weight:900;cursor:pointer}.zoom-control output{min-width:0;color:#17364c;font-size:13px;font-weight:900;text-align:center}.zoom-control .zoom-reset{color:var(--reader-menu-icon-color);font-size:17px}.page-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:9px}.page-grid button{min-height:78px;display:grid;grid-template-columns:1fr auto;align-content:center;gap:3px 8px;padding:10px 12px;border:1px solid #d7e3e6;border-radius:14px;background:#fff;color:#24516a;cursor:pointer;text-align:left}.page-grid button small{grid-column:1 / -1;color:#718792;font-size:10px;font-weight:800}.page-grid button strong{font-size:17px}.page-grid button span{color:#78909d;font-size:11px}.page-grid button.current{border-color:#07968e;background:#e9f8f5;box-shadow:inset 0 0 0 1px #07968e}.related-ba-list{display:grid;gap:10px}.related-ba-list>button{display:grid;grid-template-columns:58px 1fr;align-items:stretch;gap:12px;padding:0;overflow:hidden;border:1px solid #d8e6e9;border-radius:17px;background:#fff;color:#17364c;cursor:pointer;text-align:left}.related-ba-list>button>span{display:grid;place-items:center;min-height:82px;background:#fff0d8;color:#c46822;font-weight:950}.related-ba-list>button>div{display:grid;align-content:center;gap:2px;padding:10px 12px 10px 0}.related-ba-list small{color:#748894;font-size:10px;font-weight:850}.related-ba-list strong{font-size:20px}.related-ba-list em{color:#6c838f;font-size:11px;font-style:normal}.empty-related{display:grid;gap:12px;padding:22px;border-radius:18px;background:#fff6df;color:#66562f}.empty-related p{margin:0;line-height:1.55}.empty-related button{min-height:44px;display:inline-flex;align-items:center;justify-content:center;border:0;border-radius:12px;background:#0a8f88;color:#fff;font-weight:800;text-align:center;cursor:pointer}.dskp-card{position:relative;width:min(760px,calc(100vw - 32px));max-height:min(820px,94dvh);overflow:auto;padding:34px;border:6px solid rgba(255,255,255,.96);border-radius:30px;background:radial-gradient(circle at 100% 0,rgba(255,195,41,.34),transparent 230px),linear-gradient(145deg,#fbfffe,#e7f7f2);box-shadow:inset 0 2px #fffffff2,0 7px #085c5533,0 22px 34px -12px #04192585,0 58px 110px #0419257a;transform-style:preserve-3d;-webkit-user-select:text;user-select:text}.dialog-close{position:absolute;z-index:3;right:20px;top:20px;box-shadow:0 7px #c85a161f,0 12px 24px #23344926}.dskp-card-heading{position:relative;display:grid;grid-template-columns:58px minmax(0,1fr);align-items:center;gap:15px;padding:0 56px 20px 0}.dskp-card-heading:after{content:"";position:absolute;right:2px;bottom:12px;width:42%;height:5px;border-radius:999px;background:linear-gradient(90deg,transparent,rgba(245,130,42,.52))}.dskp-card-heading .edcloud-bulb{width:58px;height:58px;box-shadow:0 9px #c85a1621,0 18px 28px #c85a1633}.dskp-card h2{margin:3px 0 4px;color:var(--edcloud-ink);font-size:clamp(25px,4vw,40px);line-height:1.12;text-shadow:0 2px 0 white}.dskp-page-label{margin:0;color:#5a7580;font-size:14px;font-weight:800}.dskp-standard-list{display:grid;gap:17px;perspective:900px}.dskp-standard-group{min-width:0;overflow:hidden;border:1px solid #bddbd5;border-radius:19px;background:#fffffff5;box-shadow:0 4px #087f7924,0 14px 26px #10404424;transition:transform .2s ease,box-shadow .2s ease}.dskp-standard-group:hover{transform:translateY(-3px);box-shadow:0 7px #087f7921,0 20px 34px #10404430}.dskp-parent-line{display:grid;grid-template-columns:max-content minmax(0,1fr);align-items:start;gap:12px;padding:16px;background:linear-gradient(105deg,#07776f,#0b998d 64%,#16a99b);color:#fff;box-shadow:inset 0 -3px #02524d3d,inset 0 1px #fff3}.dskp-parent-line strong{padding:3px 9px;border-radius:9px;background:#ffffff2e;box-shadow:inset 0 1px #ffffff3b,0 3px 7px #00363229;font-size:20px;line-height:1.45;overflow-wrap:anywhere}.dskp-parent-line p{margin:2px 0 0;font-size:16px;font-weight:760;line-height:1.5;white-space:pre-wrap}.dskp-standard-group ul{display:grid;gap:0;margin:0;padding:6px 16px 10px;list-style:none}.dskp-standard-group li{display:grid;grid-template-columns:max-content minmax(0,1fr);align-items:start;gap:10px;padding:11px 0;color:#284d5a}.dskp-standard-group li+li{border-top:1px solid #dcebe7}.dskp-standard-group li strong{min-width:34px;padding:2px 7px;border-radius:8px;background:linear-gradient(145deg,#fff7ca,#ffe69a);color:#8a5016;box-shadow:0 3px #c85a161f;font-size:16px;line-height:1.5;text-align:center}.dskp-standard-group li p{margin:2px 0 0;font-size:16px;font-weight:700;line-height:1.5;white-space:pre-wrap}.vocabulary-backdrop{position:fixed;inset:0;z-index:70;display:grid;place-items:center;padding:18px;background:radial-gradient(circle at 50% 42%,rgba(18,95,91,.16),transparent 42%),#0f1b28bd;-webkit-backdrop-filter:blur(11px) saturate(.82);backdrop-filter:blur(11px) saturate(.82);perspective:1200px;animation:edcloud-backdrop-in .24s ease-out both}:is(.vocabulary-dialog,.info-dialog,.passage-dialog,.media-dialog,.web-tool-dialog,.answer-dialog,.dskp-card){font-family:var(--edcloud-textbook-font);font-weight:700;font-synthesis:weight}.vocabulary-dialog{position:relative;width:min(720px,96vw);max-height:min(780px,94dvh);display:grid;overflow:auto;border:5px solid rgba(255,255,255,.92);border-radius:30px;background:radial-gradient(circle at 100% 0,rgba(255,195,41,.24),transparent 190px),var(--edcloud-cream);box-shadow:0 7px #955e172e,0 30px 55px -18px #00162394,0 68px 120px #0016235c;transform-style:preserve-3d;-webkit-user-select:text;user-select:text;animation:edcloud-dialog-pop .38s cubic-bezier(.16,.88,.24,1.08)}:is(.vocabulary-dialog,.info-dialog,.passage-dialog,.media-dialog,.answer-dialog,.dskp-card,.web-tool-popup-gallery){overscroll-behavior:contain}@media(hover:hover)and (pointer:fine){@supports not selector(::-webkit-scrollbar){:is(.vocabulary-dialog,.info-dialog,.passage-dialog,.media-dialog,.answer-dialog,.dskp-card,.web-tool-popup-gallery){scrollbar-width:thin;scrollbar-color:rgba(25,112,111,.68) transparent}}:is(.vocabulary-dialog,.info-dialog,.passage-dialog,.media-dialog,.answer-dialog,.dskp-card,.web-tool-popup-gallery){scrollbar-gutter:stable}:is(.vocabulary-dialog,.info-dialog,.passage-dialog,.media-dialog,.answer-dialog,.dskp-card,.web-tool-popup-gallery)::-webkit-scrollbar{width:11px;height:11px}:is(.vocabulary-dialog,.info-dialog,.passage-dialog,.media-dialog,.answer-dialog,.dskp-card,.web-tool-popup-gallery)::-webkit-scrollbar-track{margin:18px 0;background:transparent}:is(.vocabulary-dialog,.info-dialog,.passage-dialog,.media-dialog,.answer-dialog,.dskp-card,.web-tool-popup-gallery)::-webkit-scrollbar-thumb{min-height:46px;border:3px solid transparent;border-radius:999px;background:#19706fad;background-clip:padding-box}:is(.vocabulary-dialog,.info-dialog,.passage-dialog,.media-dialog,.answer-dialog,.dskp-card,.web-tool-popup-gallery)::-webkit-scrollbar-thumb:hover{background-color:#085c55e0}:is(.vocabulary-dialog,.info-dialog,.passage-dialog,.media-dialog,.answer-dialog,.dskp-card,.web-tool-popup-gallery)::-webkit-scrollbar-button{width:0;height:0;display:none}:is(.vocabulary-dialog,.info-dialog,.passage-dialog,.media-dialog,.answer-dialog,.dskp-card,.web-tool-popup-gallery)::-webkit-scrollbar-corner{background:transparent}}@keyframes edcloud-backdrop-in{0%{opacity:0}to{opacity:1}}@keyframes edcloud-dialog-pop{0%{opacity:0;transform:translateY(42px) scale(.9) rotateX(8deg)}68%{opacity:1;transform:translateY(-4px) scale(1.012) rotateX(-1deg)}to{opacity:1;transform:translateY(0) scale(1) rotateX(0)}}.vocabulary-dialog.with-image{width:min(1160px,98vw);grid-template-columns:minmax(400px,1fr) minmax(500px,1.12fr)}.vocabulary-close{position:absolute;z-index:3;top:16px;right:16px;width:44px;height:44px;display:grid;place-items:center;appearance:none;padding:0;border:1px solid #d8e3e8;border-radius:50%;background:#fffffff0;color:#183a52;box-shadow:0 7px 22px #14324026;cursor:pointer}.vocabulary-media{min-height:100%;display:grid;align-content:center;gap:12px;padding:20px;background:linear-gradient(150deg,#fff1ad,#ffe0c7)}.vocabulary-media img{width:100%;max-height:min(650px,76dvh);display:block;object-fit:contain;border:6px solid white;border-radius:24px;box-shadow:0 16px 34px #1c444d2e}.vocabulary-media p{margin:0;color:#617987;font-size:13px;line-height:1.55;text-align:center}.vocabulary-content{min-width:0;display:grid;align-content:center;gap:12px;padding:48px 36px 30px}.vocabulary-content>small{color:var(--edcloud-orange-deep);font-weight:900;letter-spacing:.12em;text-transform:uppercase}.vocabulary-content h2{margin:0 54px 8px 0;color:var(--edcloud-ink);font-size:clamp(30px,5vw,54px);line-height:1.05;overflow-wrap:anywhere}.vocabulary-language-rows{display:grid;gap:11px}.vocabulary-language-row{min-width:0;display:grid;gap:8px;padding:14px;border:1px solid #cfe4df;border-radius:18px;background:#eefaf7}.vocabulary-language-row:nth-child(4n+2){border-color:#d3e0f3;background:#f0f5ff}.vocabulary-language-row:nth-child(4n+3){border-color:#efdacf;background:#fff4ef}.vocabulary-language-row:nth-child(4n){border-color:#e1d8f3;background:#f7f1ff}.vocabulary-language-name{color:#496476;font-size:11px;font-weight:800}.vocabulary-spoken-line{min-width:0;display:grid;grid-template-columns:44px minmax(0,1fr);align-items:center;gap:10px}.vocabulary-spoken-line+.vocabulary-spoken-line{padding-top:7px;border-top:1px solid rgba(52,91,103,.12)}.vocabulary-spoken-line>button{width:42px;height:42px;display:grid;place-items:center;border:0;border-radius:13px;background:#0b918a;color:#fff;cursor:pointer;font-size:16px}.vocabulary-spoken-line>button:disabled{background:#cbd8db;cursor:not-allowed}.vocabulary-spoken-line strong{color:#193b57;font-size:22px;font-weight:800;overflow-wrap:anywhere}.vocabulary-spoken-line p{margin:0;color:#304f62;font-size:19px;font-weight:700;line-height:1.45;overflow-wrap:anywhere}.info-dialog{position:relative;width:min(1080px,97vw);max-height:min(860px,94dvh);display:grid;gap:18px;padding:38px;overflow:auto;scroll-behavior:smooth;scroll-padding-block:22%;border:5px solid rgba(255,255,255,.92);border-radius:30px;background:radial-gradient(circle at 100% 0,rgba(255,195,41,.3),transparent 240px),linear-gradient(145deg,#fffef9,#fff6d8);box-shadow:0 7px #955e1729,0 30px 55px -18px #00162394,0 68px 120px #00162357;transform-style:preserve-3d;-webkit-user-select:text;user-select:text;animation:edcloud-dialog-pop .38s cubic-bezier(.16,.88,.24,1.08)}.info-dialog-heading{display:flex;align-items:center;gap:16px;padding-right:54px}.info-dialog-heading>.edcloud-bulb{flex:0 0 54px;width:54px;height:54px}.info-dialog-heading>div{display:grid;gap:3px}.info-dialog-heading h2{margin:3px 0 0;color:#19364f;font-size:clamp(28px,4.5vw,45px);line-height:1.08}.info-language-rows{display:grid;gap:14px}.info-language-row{display:grid;gap:10px;padding:18px;border:1px solid #efd9b7;border-radius:18px;background:#ffffffc7}.info-language-row:nth-child(4n+2){border-color:#d5e2f2;background:#f5f8ff}.info-language-row:nth-child(4n+3){border-color:#d5e9e3;background:#f1fbf8}.info-language-row:nth-child(4n){border-color:#e3d8f1;background:#f9f4ff}.info-language-row header{display:flex;align-items:center;justify-content:space-between;gap:12px}.info-language-row header small{color:#607987;font-size:14px;font-weight:850}.info-language-row header .reader-audio-button{min-height:38px;padding:7px 12px;border-radius:12px;font-size:12px}.info-language-row h3{margin:0;color:#193b57;font-size:25px;font-weight:800}.info-language-row>p{margin:0;color:#294a60;font-size:23px;font-weight:700;line-height:1.75;white-space:pre-wrap}.info-language-row dl{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:9px;margin:2px 0 0}.info-language-row dl div{min-width:0;padding:11px 13px;border:1px solid rgba(202,105,82,.18);border-radius:13px;background:#fff}.info-language-row dl div.has-image-gallery{grid-column:1 / -1}.info-language-row .info-example-images{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:10px;margin-bottom:11px}.info-language-row dl img{width:100%;height:240px;display:block;object-fit:contain;border-radius:12px;background:#f7faf8}.info-language-row dt{color:#be514a;font-size:15px;font-weight:900;white-space:pre-wrap}.info-language-row dd{margin:5px 0 0;color:#294a60;font-size:19px;font-weight:700;line-height:1.55;overflow-wrap:anywhere;white-space:pre-wrap}.passage-dialog{position:relative;width:min(900px,96vw);max-height:min(880px,94dvh);display:grid;gap:18px;overflow:auto;scroll-behavior:smooth;scroll-padding-block:15%;padding:38px;border:5px solid rgba(255,255,255,.94);border-radius:30px;background:radial-gradient(circle at 100% 0,rgba(255,195,41,.26),transparent 220px),linear-gradient(145deg,#fffef9,#eef9f6);box-shadow:0 7px #085c552b,0 30px 55px -18px #00162399,0 68px 120px #0016235c;transform-style:preserve-3d;color:var(--edcloud-ink);-webkit-user-select:text;user-select:text;animation:edcloud-dialog-pop .38s cubic-bezier(.16,.88,.24,1.08)}.passage-dialog-heading{display:flex;align-items:center;gap:16px;padding-right:54px}.passage-dialog-heading>.edcloud-bulb{width:60px;height:52px;flex:0 0 auto}.passage-dialog-heading small{color:var(--edcloud-orange-deep);font-weight:900;letter-spacing:.1em;text-transform:uppercase}.passage-dialog-heading h2{margin:4px 0 0;color:var(--edcloud-ink);font-size:clamp(28px,4.5vw,44px);line-height:1.12}.passage-tabs{display:flex;gap:8px;overflow-x:auto;padding-bottom:4px}.passage-tabs button{flex:0 0 auto;min-height:40px;display:inline-flex;align-items:center;justify-content:center;padding:0 16px;border:1px solid #b9cae9;border-radius:999px;background:#fff;color:#31558f;text-align:center;cursor:pointer;font-weight:850}.passage-tabs button.active{border-color:var(--edcloud-orange);background:var(--edcloud-orange);color:#fff}.passage-article{display:grid;gap:16px;padding:22px;border:1px solid rgba(245,130,42,.2);border-radius:20px;background:#ffffffe6;box-shadow:0 10px 26px #2334490f}.passage-article header{display:flex;align-items:center;justify-content:space-between;gap:14px}.passage-article header>div{display:grid;gap:4px}.passage-article header small{color:#637891;font-weight:850}.passage-article h3{margin:0;color:var(--edcloud-ink);font-size:25px}.passage-article header .reader-audio-button{min-height:42px;padding:0 14px;border-radius:12px}.passage-sentence-help{width:fit-content;margin:-5px 0 -2px;padding:6px 10px;border-radius:999px;background:#f5822a14;color:#6b7d88;font-size:13px;font-weight:750;line-height:1.35}.passage-article>p{margin:0;color:#294a60;font-size:23px;font-weight:700;line-height:1.78;white-space:pre-wrap}.passage-sentence{border-radius:6px;-webkit-box-decoration-break:clone;box-decoration-break:clone}.passage-sentence.playable{cursor:pointer;touch-action:manipulation;transition:background-color .16s ease,box-shadow .16s ease}.passage-sentence.playable:hover{background:#f5822a17;box-shadow:3px 0 #f5822a2e,-3px 0 #f5822a2e}.passage-sentence.playable:focus-visible{outline:0;background:#f5822a21;box-shadow:0 0 0 3px #f5822a3d}.passage-sentence.active{background:#ffc32933;box-shadow:3px 0 #f5822a47,-3px 0 #f5822a47}.passage-summary{display:grid;gap:12px;margin-top:4px;padding:18px;border:1px solid rgba(11,146,136,.24);border-radius:16px;background:linear-gradient(135deg,#effbf7,#fff9e9)}.passage-summary header{display:flex;align-items:center;justify-content:space-between;gap:12px}.passage-summary h4{margin:0;color:#087f79;font-size:21px}.passage-summary>p{margin:0;color:#294a60;font-size:21px;font-weight:700;line-height:1.72;white-space:pre-wrap}@media(max-width:720px){.passage-article>header,.passage-summary header{align-items:stretch;flex-direction:column}.passage-summary{padding:14px}.passage-summary>p{font-size:20px;line-height:1.68}}.media-dialog{position:relative;width:min(940px,96vw);max-height:min(860px,94dvh);display:grid;gap:18px;overflow:auto;padding:32px;border:5px solid rgba(255,255,255,.94);border-radius:30px;background:#101b24;box-shadow:0 35px 90px #00162394;color:#fff;-webkit-user-select:text;user-select:text}.media-dialog-heading{display:flex;align-items:center;gap:14px;padding-right:54px}.media-dialog-heading>span{width:54px;height:54px;display:grid;place-items:center;flex:0 0 auto;border-radius:17px;background:#d94c49;font-size:22px}.media-dialog-heading small{color:#ffaaa7;font-weight:900;letter-spacing:.1em;text-transform:uppercase}.media-dialog-heading h2{margin:4px 0 0;font-size:clamp(25px,4vw,42px)}.media-dialog.is-app-fullscreen{position:fixed;inset:0;width:100vw;height:100dvh;max-height:none;display:block;overflow:hidden;padding:0;border:0;border-radius:0;background:#000;box-shadow:none;animation:none;transform:none}.media-dialog.is-app-fullscreen>:not(.video-fullscreen-surface){display:none}.media-dialog.is-app-fullscreen>.video-fullscreen-surface{width:100%;height:100%}.web-tool-dialog{position:relative;width:min(1120px,97vw);height:min(900px,94dvh);min-height:480px;display:grid;grid-template-rows:auto minmax(0,1fr) auto;gap:12px;overflow:hidden;padding:24px;border:5px solid rgba(255,255,255,.94);border-radius:28px;background:#f4fbff;box-shadow:0 35px 90px #0016238a;color:#17384e;-webkit-user-select:text;user-select:text}.web-tool-dialog>header{min-width:0;display:flex;align-items:center;gap:12px;padding-right:54px}.web-tool-dialog>header>div{min-width:0;display:grid;gap:3px}.web-tool-dialog>header small{color:#1476a4;font-weight:900;letter-spacing:.09em;text-transform:uppercase}.web-tool-dialog>header h2{margin:0;overflow:hidden;color:#164f6d;font-size:clamp(23px,3.8vw,36px);text-overflow:ellipsis;white-space:nowrap}.web-tool-dialog>header p{margin:0;color:#627b87;font-size:13px}.web-tool-heading-icon{width:58px;height:58px;display:grid;place-items:center;flex:0 0 auto;border-radius:16px;background:#1476a4;color:#fff;box-shadow:0 6px 18px #12466342}.web-tool-back{min-height:44px;display:inline-flex;align-items:center;justify-content:center;gap:8px;flex:0 0 auto;padding:0 13px;border:1px solid #b9d4e0;border-radius:12px;background:#fff;color:#1476a4;text-align:center;cursor:pointer;font-weight:850}.web-tool-popup-gallery{min-width:0;min-height:0;display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));align-content:start;gap:16px;overflow:auto;padding:4px}.web-tool-popup-gallery>button{min-width:0;display:grid;grid-template-rows:minmax(140px,1fr) auto;gap:10px;overflow:hidden;padding:10px;border:1px solid #c4dce7;border-radius:17px;background:#fff;color:#164f6d;cursor:pointer;box-shadow:0 5px 16px #1246631f;transition:transform .22s cubic-bezier(.2,.9,.25,1.2),box-shadow .22s ease,border-color .18s ease}.web-tool-popup-gallery>button:hover,.web-tool-popup-gallery>button:focus-visible{border-color:#168bc3;outline:3px solid rgba(22,139,195,.18);transform:translateY(-2px)}.web-tool-popup-gallery img{width:100%;height:100%;min-height:140px;max-height:280px;display:block;object-fit:contain;border-radius:11px;background:#f8fcfe}.web-tool-popup-gallery strong{overflow:hidden;padding:2px 4px 4px;font-size:15px;text-overflow:ellipsis;white-space:nowrap}.web-tool-frame{min-width:0;min-height:0;overflow:hidden;border:1px solid #c4dce7;border-radius:16px;background:#fff}.web-tool-frame iframe{width:100%;height:100%;display:block;border:0;background:#fff}.web-tool-dialog>footer{display:flex;align-items:center;justify-content:space-between;gap:12px}.web-tool-dialog>footer p{margin:0;color:#627b87;font-size:12px;line-height:1.45}.web-tool-dialog>footer a{flex:0 0 auto;min-height:40px;display:inline-flex;align-items:center;padding:0 14px;border-radius:11px;background:#087f79;color:#fff;font-size:12px;font-weight:850;text-decoration:none}.answer-dialog{position:relative;width:min(620px,94vw);max-height:min(760px,92dvh);display:grid;gap:14px;overflow:auto;padding:34px;border:5px solid white;border-radius:28px;background:linear-gradient(145deg,#fffdf4,#ffefbd);box-shadow:0 34px 84px #00162373;color:#5d3a12;-webkit-user-select:text;user-select:text}.answer-dialog>small{color:#a45e14;font-weight:900;letter-spacing:.1em}.answer-dialog h2{margin:0;font-size:clamp(28px,5vw,44px)}.answer-dialog-value{min-height:120px;display:grid;place-items:center;padding:20px;border:1px solid #efc47b;border-radius:18px;background:#ffffffd1}.answer-dialog-value p,.answer-dialog-value ul{margin:0;white-space:pre-wrap}.answer-dialog-value img{max-width:100%;max-height:56dvh;object-fit:contain}.answer-dialog-audio{--karaoke-base-color: #5d3a12;--karaoke-fill-color: #178d84;--karaoke-done-color: #178d84;width:100%;appearance:none;color:inherit;cursor:pointer}.answer-dialog-audio>small{color:#087f79;font-size:12px;font-weight:900}.answer-dialog-audio .karaoke-done{color:var(--karaoke-done-color)}.media-dialog,.web-tool-dialog,.answer-dialog,.dskp-card{animation:edcloud-dialog-pop .38s cubic-bezier(.16,.88,.24,1.08)}.media-dialog{border-color:#fffffff0;background:radial-gradient(circle at 100% 0,rgba(255,195,41,.19),transparent 230px),#172435}.media-dialog-heading>span{border:2px solid rgba(255,255,255,.9);border-radius:19px 24px 18px 25px;background:radial-gradient(circle at 30% 22%,rgba(255,255,255,.42),transparent 27%),linear-gradient(145deg,#ff7a82,#ed4d91 52%,#6a5ad7);box-shadow:inset 0 2px 4px #ffffff57,0 0 0 4px #ff69a314,0 8px 22px #71246c4d}.media-dialog-heading>span .video-icon-svg{width:74%;height:74%}.media-dialog-heading small{color:#ffd56a}.web-tool-dialog{background:radial-gradient(circle at 100% 0,rgba(255,195,41,.24),transparent 220px),var(--edcloud-cream);color:var(--edcloud-ink)}.web-tool-dialog>header small,.web-tool-dialog>header h2{color:var(--edcloud-orange-deep)}.web-tool-heading-icon{border:2px solid rgba(255,255,255,.92);border-radius:20px 25px 19px 27px;background:radial-gradient(circle at 30% 22%,rgba(255,255,255,.46),transparent 28%),linear-gradient(145deg,#43dbc0,#0b98b5 52%,#5758d7);color:#fff;box-shadow:inset 0 2px 4px #ffffff5c,0 0 0 4px #43dbc01a,0 8px 22px #1c5b9147}.web-tool-popup-gallery>button{border-color:#f5822a38;color:var(--edcloud-ink)}.web-tool-popup-gallery>button:hover,.web-tool-popup-gallery>button:focus-visible{border-color:var(--edcloud-orange);outline-color:#f5822a2e}.answer-dialog{background:radial-gradient(circle at 100% 0,rgba(255,195,41,.38),transparent 210px),linear-gradient(145deg,#fffdf4,#ffefbd);animation:edcloud-dialog-pop .38s cubic-bezier(.16,.88,.24,1.08)}.answer-dialog-audio{cursor:auto}.answer-dialog>.reader-audio-button{justify-self:start}@media(max-width:940px){.vocabulary-dialog.with-image{grid-template-columns:1fr}.vocabulary-media{min-height:0}.vocabulary-media img{justify-self:center;width:min(100%,720px);max-height:42dvh}}@media(max-width:720px){.vocabulary-backdrop{padding:8px}.vocabulary-dialog.with-image{grid-template-columns:1fr}.vocabulary-dialog{width:100%;max-height:calc(100dvh - 16px);border-width:3px;border-radius:22px}.vocabulary-media{min-height:0;padding:12px}.vocabulary-media img{max-height:42dvh}.vocabulary-content{padding:24px 18px 20px}.vocabulary-content h2{font-size:34px}.vocabulary-language-row{padding:11px}.vocabulary-spoken-line{grid-template-columns:42px minmax(0,1fr)}.vocabulary-spoken-line>.reader-audio-button.compact{width:42px;height:42px;min-height:42px}}@media(max-width:720px){.info-dialog{width:100%;max-height:calc(100dvh - 16px);gap:13px;padding:24px 16px 18px;border-width:3px;border-radius:22px}.info-dialog-heading>.edcloud-bulb{flex-basis:46px;width:46px;height:46px}.info-dialog-heading h2{font-size:29px}.info-language-row{padding:13px}.info-language-row header{align-items:stretch;flex-direction:column}.info-language-row dl,.info-language-row .info-example-images{grid-template-columns:1fr}.info-language-row dl img{height:auto;min-height:180px;max-height:340px}.info-language-row>p{font-size:20px;line-height:1.7}}@media(max-width:720px){.passage-dialog{width:100%;max-height:calc(100dvh - 16px);gap:13px;padding:24px 16px 18px;border-width:3px;border-radius:22px}.passage-dialog-heading>.edcloud-bulb{width:52px;height:46px}.passage-dialog-heading h2{font-size:29px}.passage-article{padding:14px}.passage-article header{align-items:stretch;flex-direction:column}.passage-article>p{font-size:21px;line-height:1.72}}@media(max-width:720px){.media-dialog,.answer-dialog{width:100%;max-height:calc(100dvh - 16px);padding:22px 14px 16px;border-width:3px;border-radius:22px}.media-dialog.is-app-fullscreen{width:100vw;max-height:none;padding:0;border-width:0;border-radius:0}}@media(max-width:720px){.web-tool-dialog{width:100%;height:calc(100dvh - 16px);min-height:0;padding:18px 10px 10px;border-width:3px;border-radius:20px}.web-tool-heading-icon{width:46px;height:46px}.web-tool-back span{display:none}.web-tool-popup-gallery{grid-template-columns:repeat(2,minmax(0,1fr));gap:9px}.web-tool-popup-gallery>button{grid-template-rows:minmax(100px,1fr) auto;padding:7px}.web-tool-popup-gallery img{min-height:100px;max-height:220px}.web-tool-dialog>footer{align-items:stretch;flex-direction:column}.web-tool-dialog>footer a{justify-content:center}}@media(max-width:720px){.karaoke-strip{bottom:max(10px,env(safe-area-inset-bottom));width:calc(100vw - 16px);grid-template-columns:minmax(0,1fr) 34px;padding:12px 10px 13px 14px;border-radius:16px}.karaoke-strip p{font-size:17px;line-height:1.48}.karaoke-strip>button{width:32px;height:32px;font-size:20px}}@media(max-width:720px){.dskp-card{width:100%;max-height:calc(100dvh - 16px);padding:24px 14px 18px;border-width:3px;border-radius:22px}.dskp-card-heading{grid-template-columns:46px minmax(0,1fr);gap:11px;padding-right:46px}.dskp-card-heading .edcloud-bulb{width:46px;height:46px}.dskp-parent-line{grid-template-columns:1fr;gap:4px;padding:14px}.dskp-standard-group ul{padding-inline:14px}.info-language-row header>.reader-audio-button,.passage-article header>.reader-audio-button,.passage-summary header>.reader-audio-button,.answer-dialog>.reader-audio-button{width:100%;justify-self:stretch}.reader-audio-controls{width:100%;justify-content:center}.reader-audio-controls>:is(.reader-audio-button,.reader-audio-restart){flex:1 1 0}.answer-dialog>.reader-audio-button{justify-self:stretch}}@media(max-width:1024px),(pointer:coarse){.book-stage{padding:2px}.real-flip-book{filter:drop-shadow(0 14px 20px rgba(30,45,52,.2))}.menu-trigger{top:max(8px,calc(env(safe-area-inset-top) + 8px));left:max(8px,calc(env(safe-area-inset-left) + 8px));width:40px;height:40px;border-radius:13px}.menu-trigger .edcloud-bulb{width:28px;height:28px}.ba-return-trigger{top:max(8px,calc(env(safe-area-inset-top) + 8px));right:max(8px,calc(env(safe-area-inset-right) + 8px));min-height:40px;gap:6px;padding:0 11px 0 9px;border-radius:13px;font-size:11px}.ba-return-trigger svg{width:17px;height:17px}}.reader.ios-webkit .book-stage{align-items:center}.reader.ios-webkit .book-viewport{align-self:center;overflow:hidden;contain:layout paint size;isolation:isolate;box-shadow:none}.reader.ios-webkit .real-flip-book{filter:none}.reader.ios-webkit .real-flip-book .stf__wrapper,.reader.ios-webkit .real-flip-book .stf__block{overflow:hidden}.reader.ios-webkit.single-page :is(.page-left,.page-right){box-shadow:none}.reader.ios-webkit :is(.stf__outerShadow,.stf__innerShadow,.stf__hardShadow,.stf__hardInnerShadow){display:none!important}.reader.ios-webkit .real-flip-book.is-turning .stf__item,.reader.ios-webkit .real-flip-book.is-turning :is(.stf__outerShadow,.stf__innerShadow,.stf__hardShadow,.stf__hardInnerShadow){will-change:auto}@supports (-webkit-touch-callout: none){@media(pointer:coarse){.reader .book-stage{align-items:center}.reader .book-viewport{align-self:center}.reader .real-flip-book .stf__wrapper,.reader .real-flip-book .stf__block{overflow:hidden}}}.reader-kids-ambient{position:absolute;z-index:0;inset:0;overflow:hidden;pointer-events:none}.reader-kids-ambient span{position:absolute;display:block;border-radius:42% 58% 63% 37%/50% 41% 59% 50%;opacity:.52;filter:blur(.2px);animation:edcloud-ambient-drift 12s ease-in-out infinite alternate}.reader-kids-ambient span:nth-child(1){left:-5vw;top:18%;width:min(18vw,240px);aspect-ratio:1;background:radial-gradient(circle at 35% 30%,rgba(255,255,255,.8),rgba(255,195,41,.2) 48%,transparent 70%)}.reader-kids-ambient span:nth-child(2){right:-4vw;top:10%;width:min(15vw,210px);aspect-ratio:1;background:radial-gradient(circle at 35% 30%,rgba(255,255,255,.8),rgba(245,130,42,.17) 50%,transparent 72%);animation-delay:-4s}.reader-kids-ambient span:nth-child(3){right:3vw;bottom:-7%;width:min(24vw,330px);aspect-ratio:1;background:radial-gradient(circle at 48% 45%,rgba(255,255,255,.7),rgba(31,183,166,.15) 52%,transparent 72%);animation-delay:-8s}.reader-kids-ambient span:nth-child(4){left:13vw;bottom:4%;width:min(9vw,120px);aspect-ratio:1;background:radial-gradient(circle,rgba(255,240,163,.58),transparent 68%);animation-duration:9s;animation-delay:-2s}@keyframes edcloud-ambient-drift{0%{transform:translate3d(-5px,-8px,0) rotate(-3deg) scale(.96)}to{transform:translate3d(12px,10px,0) rotate(5deg) scale(1.06)}}.effects-quiet .reader-kids-ambient span{animation:none;opacity:.27}.page-discovery-hint{position:fixed;z-index:24;top:max(14px,env(safe-area-inset-top));left:max(72px,calc(env(safe-area-inset-left) + 72px));max-width:min(430px,calc(100vw - 94px));min-height:48px;display:flex;align-items:center;gap:10px;padding:6px 16px 6px 7px;border:2px solid rgba(255,255,255,.88);border-radius:18px;background:linear-gradient(135deg,#fffdf0f5,#effbf7f5);color:#315160;box-shadow:0 5px #c85a161a,0 15px 36px #1a39412e;font-size:12px;font-weight:850;pointer-events:none;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);animation:edcloud-discovery-hint 5.2s ease both}.page-discovery-hint .edcloud-bulb{width:34px;height:34px;border-radius:12px;box-shadow:0 5px 12px #c85a1629}.page-discovery-copy{min-width:0;display:grid;gap:2px}.page-discovery-copy strong{color:#294c57;font-size:12px;line-height:1.35}.page-discovery-copy small{color:#71828a;font-size:9px;font-weight:720;line-height:1.35}@keyframes edcloud-discovery-hint{0%{opacity:0;transform:translateY(-15px) scale(.92)}9%,76%{opacity:1;transform:translateY(0) scale(1)}84%{transform:translateY(-3px) rotate(-1deg)}to{opacity:0;transform:translateY(-10px) scale(.97)}}.kids-effect-hotspot{isolation:isolate;transform-origin:center}.kids-effect-hotspot.transparent:is(.passage,.karaoke){z-index:1}.kids-effect-hotspot.transparent:is(.vocabulary,.information){z-index:2}.effects-lively .kids-effect-hotspot:is(.audio-icon,.info-icon,.video-icon,.tool-icon):before{content:"";position:absolute;z-index:-1;inset:-42%;border:max(1px,calc(2px * var(--reader-authoring-scale, 1))) solid var(--hotspot-ring, currentColor);border-radius:50%;opacity:.22;box-shadow:0 0 max(6px,calc(12px * var(--reader-authoring-scale, 1))) var(--hotspot-ring, currentColor);pointer-events:none;animation:edcloud-hotspot-beacon 2s cubic-bezier(.2,.7,.2,1) infinite;animation-delay:var(--hotspot-effect-delay, 0s)}.effects-lively .kids-effect-hotspot.transparent:before{content:"";position:absolute;z-index:1;inset:0;border-radius:inherit;background:linear-gradient(105deg,transparent 0 38%,rgba(255,240,163,.06) 43%,rgba(255,211,74,.4) 50%,rgba(245,130,42,.12) 57%,transparent 62% 100%);background-position:140% 0;background-size:240% 100%;opacity:0;pointer-events:none;animation:edcloud-transparent-shimmer 7s ease-in-out infinite;animation-delay:var(--hotspot-effect-delay, 0s)}.effects-lively .kids-effect-hotspot:is(.audio-icon,.info-icon,.video-icon,.tool-icon)>:is(span,svg,img){filter:drop-shadow(0 2px 1px rgba(0,0,0,.16));animation:edcloud-hotspot-glyph 2.55s ease-in-out infinite;animation-delay:var(--hotspot-effect-delay, 0s)}.effects-lively :is(.audio-icon,.info-icon) .info-bulb-image{animation:edcloud-bulb-image-glow 1.7s ease-in-out infinite;animation-delay:var(--hotspot-effect-delay, 0s)}.effects-lively .tool-icon-tile-one{animation:edcloud-tool-tile-one 2.6s ease-in-out infinite;animation-delay:var(--hotspot-effect-delay, 0s)}.effects-lively .tool-icon-tile-two{animation:edcloud-tool-tile-two 2.6s ease-in-out infinite;animation-delay:calc(var(--hotspot-effect-delay, 0s) + .12s)}.effects-lively .tool-icon-tile-three{animation:edcloud-tool-tile-three 2.6s ease-in-out infinite;animation-delay:calc(var(--hotspot-effect-delay, 0s) + .24s)}.effects-lively .tool-icon-tile-four{animation:edcloud-tool-tile-four 2.6s ease-in-out infinite;animation-delay:calc(var(--hotspot-effect-delay, 0s) + .36s)}.effects-lively .tool-icon-spark{animation:edcloud-tool-spark 1.3s ease-in-out infinite;animation-delay:var(--hotspot-effect-delay, 0s)}.effects-lively :is(.video-icon,.media-dialog-heading) .video-icon-play{animation:edcloud-video-play 1.9s ease-in-out infinite;animation-delay:var(--hotspot-effect-delay, 0s)}.effects-lively :is(.video-icon,.media-dialog-heading) .video-icon-spark{animation:edcloud-video-spark 1.35s ease-in-out infinite;animation-delay:var(--hotspot-effect-delay, 0s)}.reader-speech-hotspot:is(.audio-icon,.info-icon):hover .info-bulb-image,.reader-speech-hotspot:is(.audio-icon,.info-icon):focus-visible .info-bulb-image{filter:drop-shadow(0 0 5px #fff6a3);animation-duration:.78s}.reader-speech-hotspot.tool-icon:hover .tool-icon-spark,.reader-speech-hotspot.tool-icon:focus-visible .tool-icon-spark{filter:drop-shadow(0 0 4px #fff2a1);transform:rotate(90deg) scale(1.35)}.kids-effect-hotspot.transparent:hover,.kids-effect-hotspot.transparent:focus-visible{outline:max(1px,calc(2px * var(--reader-authoring-scale, 1))) solid rgba(245,130,42,.82);outline-offset:1px;background:transparent;box-shadow:inset 0 0 0 max(1px,calc(1px * var(--reader-authoring-scale, 1))) #ffffffb8,0 0 12px #ffc3295c}.kids-effect-hotspot.transparent:is(.vocabulary,.information):hover,.kids-effect-hotspot.transparent:is(.vocabulary,.information):focus-visible{outline-color:#0a978fe6;outline-offset:calc(-2px * var(--reader-authoring-scale, 1));box-shadow:inset 0 0 0 max(1px,calc(2px * var(--reader-authoring-scale, 1))) #68ddcc38,0 0 12px #0a978f57}.interaction-guide-active .kids-effect-hotspot.transparent{outline:max(1px,calc(2px * var(--reader-authoring-scale, 1))) solid rgba(245,130,42,.96);outline-offset:max(1px,calc(2px * var(--reader-authoring-scale, 1)));background:transparent;box-shadow:inset 0 0 0 max(1px,calc(1px * var(--reader-authoring-scale, 1))) #ffffffd6,0 0 0 max(2px,calc(3px * var(--reader-authoring-scale, 1))) #ffc3292e,0 0 14px #f5822a66}.interaction-guide-active .kids-effect-hotspot.transparent:is(.vocabulary,.information){outline-color:#0a978ffa;outline-offset:calc(-2px * var(--reader-authoring-scale, 1));box-shadow:inset 0 0 0 max(1px,calc(2px * var(--reader-authoring-scale, 1))) #68ddcc47,0 0 0 max(1px,calc(2px * var(--reader-authoring-scale, 1))) #ffffff75,0 0 13px #0a978f61}.interaction-guide-active .kids-effect-hotspot:is(.audio-icon,.info-icon,.video-icon,.tool-icon),.interaction-guide-active .kids-effect-answer{outline:max(1px,calc(2px * var(--reader-authoring-scale, 1))) solid rgba(255,195,41,.95);outline-offset:max(1px,calc(2px * var(--reader-authoring-scale, 1)));box-shadow:0 0 0 max(2px,calc(3px * var(--reader-authoring-scale, 1))) #f5822a2e,0 0 16px #ffc32975}@keyframes edcloud-hotspot-beacon{0%{opacity:.52;transform:scale(.64) rotate(-6deg)}56%{opacity:.16}78%,to{opacity:0;transform:scale(1.18) rotate(7deg)}}@keyframes edcloud-transparent-shimmer{0%,66%{opacity:0;background-position:140% 0}70%{opacity:.2}78%{opacity:.82}88%{opacity:0;background-position:-140% 0}to{opacity:0;background-position:-140% 0}}@keyframes edcloud-hotspot-glyph{0%,64%,to{transform:translateY(0) scale(1) rotate(0)}73%{transform:translateY(-1.5px) scale(1.11) rotate(-3deg)}82%{transform:translateY(0) scale(.97) rotate(2deg)}90%{transform:translateY(-.5px) scale(1.04) rotate(0)}}@keyframes edcloud-bulb-image-glow{0%,58%,to{filter:drop-shadow(0 0 0 rgba(255,244,160,0))}72%{filter:drop-shadow(0 0 6px rgba(255,244,160,.95))}}@keyframes edcloud-tool-tile-one{0%,58%,to{transform:translate(0) rotate(0)}70%{transform:translate(-.6px,-.8px) rotate(-8deg)}82%{transform:translate(0) rotate(2deg)}}@keyframes edcloud-tool-tile-two{0%,58%,to{transform:translate(0) rotate(0)}70%{transform:translate(.7px,-.6px) rotate(9deg)}82%{transform:translate(0) rotate(-2deg)}}@keyframes edcloud-tool-tile-three{0%,58%,to{transform:translate(0) rotate(0)}70%{transform:translate(-.7px,.7px) rotate(7deg)}82%{transform:translate(0) rotate(-2deg)}}@keyframes edcloud-tool-tile-four{0%,58%,to{transform:translate(0) rotate(0)}70%{transform:translate(.7px,.8px) rotate(-9deg)}82%{transform:translate(0) rotate(2deg)}}@keyframes edcloud-tool-spark{0%,52%,to{opacity:.62;transform:rotate(0) scale(.78)}68%{opacity:1;transform:rotate(42deg) scale(1.34);filter:drop-shadow(0 0 3px rgba(255,239,137,.95))}82%{opacity:.8;transform:rotate(76deg) scale(.94)}}@keyframes edcloud-video-play{0%,58%,to{transform:scale(1)}70%{transform:scale(1.22) rotate(-3deg)}82%{transform:scale(.96) rotate(1deg)}}@keyframes edcloud-video-spark{0%,48%,to{opacity:.52;transform:rotate(0) scale(.72)}66%{opacity:1;transform:rotate(70deg) scale(1.42);filter:drop-shadow(0 0 4px rgba(255,238,142,1))}82%{opacity:.72;transform:rotate(110deg) scale(.92)}}.kids-effect-answer{transition:filter .18s ease,box-shadow .18s ease,transform .18s ease}.effects-lively .kids-effect-answer{animation:edcloud-answer-invite 2.6s ease-in-out infinite}@keyframes edcloud-answer-invite{0%,72%,to{filter:brightness(1);box-shadow:0 3px 10px #76410c52}82%{filter:brightness(1.1);box-shadow:0 4px 16px #f5822a80,0 0 0 4px #ffc32929}}.reader-page-interactions-card{display:grid;grid-template-columns:38px minmax(0,1fr);align-items:start;gap:11px;margin:-4px 0 17px;padding:11px 12px;border:1px solid rgba(200,117,45,.14);border-radius:18px;background:#fff;box-shadow:0 7px 18px #234e4b12}.reader-page-interactions-card>.edcloud-bulb{width:38px;height:38px;align-self:center;border-radius:13px}.reader-page-interactions-card>div{min-width:0;display:grid;gap:7px}.reader-page-interactions-card small{color:#087f79;font-size:10px;font-weight:950;letter-spacing:.06em;text-transform:uppercase}.reader-page-interaction-rows{display:grid;gap:6px}.reader-page-interaction-rows p{min-width:0;display:flex;align-items:center;justify-content:space-between;gap:8px;margin:0;padding:7px 8px;border:1px solid rgba(200,117,45,.12);border-radius:10px;background:#fff}.reader-page-interaction-rows strong{overflow:hidden;color:#294c57;font-size:11px;line-height:1.3;text-overflow:ellipsis;white-space:nowrap}.reader-page-interaction-rows span{flex:0 0 auto;color:#8b5a15;font-size:9px;font-weight:850}.reader-menu-actions>.reader-effect-toggle{grid-template-columns:58px minmax(0,1fr) 48px}.reader-effect-toggle .reader-effect-toggle-copy,.reader-interaction-guide-button .reader-effect-toggle-copy{min-width:0;display:grid;align-self:stretch;align-content:center;justify-items:start;gap:3px;padding:9px 11px;background:transparent!important;color:var(--edcloud-ink)!important}.reader-effect-toggle-copy strong{font-size:12px;line-height:1.3}.reader-effect-toggle-copy small{color:#70818a;font-size:10px;font-weight:700;line-height:1.35}.reader-interaction-guide-button[aria-pressed=true]{border-color:#f5822a99;background:linear-gradient(100deg,#fff9deeb,#fff);box-shadow:0 0 0 3px #ffc32924,0 8px 20px #23344917}.reader-effect-switch{position:relative;width:36px;height:21px;justify-self:center;border-radius:999px;background:#d8dce2;box-shadow:inset 0 2px 4px #2d3a4826;transition:background .2s ease}.reader-effect-switch b{position:absolute;top:3px;left:3px;width:15px;height:15px;border-radius:50%;background:#fff;box-shadow:0 2px 5px #23344940;transition:transform .22s cubic-bezier(.2,.8,.2,1)}.reader-effect-toggle[aria-pressed=true] .reader-effect-switch{background:linear-gradient(90deg,#0b9288,#42c9b6)}.reader-effect-toggle[aria-pressed=true] .reader-effect-switch b{transform:translate(15px)}.effects-lively .vocabulary-backdrop{overflow:hidden}.vocabulary-backdrop:before,.vocabulary-backdrop:after{position:fixed;z-index:0;left:50%;top:50%;width:1px;height:1px;color:#ffd43d;font-family:ui-rounded,Arial Rounded MT Bold,ui-sans-serif,system-ui,sans-serif;font-size:clamp(30px,4.4vw,62px);line-height:1;-webkit-text-stroke:2px rgba(255,255,255,.72);pointer-events:none}.vocabulary-backdrop:before{content:"★";text-shadow:-45vw -35vh 0 #ffd43d,-33vw -43vh 0 #ff9eb5,-24vw -30vh 0 #75ddcc,28vw -40vh 0 #ffb562,43vw -27vh 0 #9fc8ff,-46vw 18vh 0 #ff93b3,31vw 36vh 0 #ffd43d,45vw 22vh 0 #77dccb}.vocabulary-backdrop:after{content:"✦";color:#fff4a5;text-shadow:-39vw -19vh 0 #fff4a5,-28vw 39vh 0 #8ce3d3,-19vw -44vh 0 #ffc0cf,20vw -43vh 0 #ffe37a,36vw -34vh 0 #a9ceff,47vw 8vh 0 #ff9eb5,-44vw 34vh 0 #ffd25e,23vw 41vh 0 #83dfcf,39vw 31vh 0 #ffb0c4}.effects-lively .vocabulary-backdrop:before{animation:edcloud-popup-stars-arrive .86s cubic-bezier(.16,.86,.24,1.14) both,edcloud-popup-stars-float-a 2.9s .86s ease-in-out infinite alternate}.effects-lively .vocabulary-backdrop:after{animation:edcloud-popup-stars-arrive 1s .08s cubic-bezier(.16,.86,.24,1.14) both,edcloud-popup-stars-float-b 3.4s 1.08s ease-in-out infinite alternate}.reader-popup-mascots{position:fixed;z-index:0;inset:0;overflow:hidden;pointer-events:none}.reader-popup-mascots img{position:absolute;display:block;width:clamp(90px,11vw,160px);aspect-ratio:1;object-fit:contain;filter:drop-shadow(0 9px 14px rgba(3,20,31,.44))}.reader-popup-mascots .running{top:8%;left:4.5%;transform:rotate(-8deg)}.reader-popup-mascots .cheering{top:9%;right:4.5%;transform:rotate(7deg)}.reader-popup-mascots .reading{bottom:8%;left:5%;transform:rotate(6deg)}.reader-popup-mascots .thinking{bottom:9%;right:5%;transform:rotate(-7deg)}.effects-lively .reader-popup-mascots img{animation:reader-mascot-float 3.2s ease-in-out infinite alternate}.effects-lively .reader-popup-mascots :is(.cheering,.thinking){animation-delay:-1.6s}@keyframes reader-mascot-float{0%{translate:0 4px}to{translate:0 -8px}}.vocabulary-backdrop>:is(.vocabulary-dialog,.info-dialog,.passage-dialog,.media-dialog,.web-tool-dialog,.answer-dialog,.dskp-card){z-index:1}.effects-lively :is(.vocabulary-dialog,.info-dialog,.passage-dialog,.web-tool-dialog,.answer-dialog,.dskp-card){box-shadow:inset 0 2px #fffffff5,0 8px #86541424,0 26px 45px -15px #0016238c,0 72px 130px #00162361}.effects-lively .info-dialog-heading>.edcloud-bulb{animation:edcloud-heading-bulb 2.45s ease-in-out infinite}.effects-lively .info-dialog-heading>.edcloud-bulb img{animation:edcloud-bulb-image-glow 1.7s ease-in-out infinite}.effects-lively .web-tool-heading-icon{animation:edcloud-tool-heading-arrive .58s cubic-bezier(.16,.9,.24,1.16) both}.effects-lively .web-tool-popup-gallery>button{animation:edcloud-tool-card-arrive .48s cubic-bezier(.18,.86,.24,1.06) both}.effects-lively .web-tool-popup-gallery>button:nth-child(2){animation-delay:.07s}.effects-lively .web-tool-popup-gallery>button:nth-child(3){animation-delay:.14s}.effects-lively .web-tool-popup-gallery>button:nth-child(4){animation-delay:.21s}.effects-lively .web-tool-popup-gallery>button:nth-child(5){animation-delay:.28s}.effects-lively .web-tool-popup-gallery>button:nth-child(6){animation-delay:.35s}.effects-lively .web-tool-popup-gallery>button:nth-child(7){animation-delay:.42s}.effects-lively .web-tool-popup-gallery>button:nth-child(8){animation-delay:.49s}.effects-lively .web-tool-popup-gallery>button:hover,.effects-lively .web-tool-popup-gallery>button:focus-visible{transform:translateY(-6px) rotate(-.6deg) scale(1.018);box-shadow:0 14px 28px #1f5d7b33,0 0 0 4px #43dbc01a}.effects-lively :is(.vocabulary-language-row,.info-language-row,.passage-article,.passage-summary,.dskp-standard-group){animation:edcloud-card-layer-in .46s cubic-bezier(.18,.85,.24,1.05) both}.effects-lively :is(.vocabulary-language-row,.info-language-row):nth-child(2){animation-delay:.07s}.effects-lively :is(.vocabulary-language-row,.info-language-row):nth-child(3){animation-delay:.14s}.effects-lively :is(.vocabulary-language-row,.info-language-row):nth-child(4){animation-delay:.21s}.effects-lively .passage-summary{animation-delay:.12s}.effects-lively :is(.vocabulary-language-row,.info-language-row,.passage-article,.passage-summary):hover{transform:translateY(-2px);box-shadow:0 10px 24px #2349501f}.effects-lively :is(.reader-audio-button,.reader-audio-restart,.passage-tabs button,.vocabulary-spoken-line>button,.web-tool-popup-gallery>button):active{transform:translateY(2px) scale(.98);filter:brightness(.98);box-shadow:0 2px 5px #1432402e}@keyframes edcloud-card-layer-in{0%{opacity:0;transform:translateY(18px) rotateX(5deg) scale(.97)}to{opacity:1;transform:translateY(0) rotateX(0) scale(1)}}@keyframes edcloud-heading-bulb{0%,62%,to{transform:rotate(-2deg) translateY(0);filter:brightness(1)}72%{transform:rotate(-8deg) translateY(-2px) scale(1.07);filter:brightness(1.16) drop-shadow(0 0 8px rgba(255,202,41,.48))}84%{transform:rotate(3deg) translateY(0) scale(.98)}}@keyframes edcloud-tool-heading-arrive{0%{opacity:0;transform:translateY(12px) rotate(-12deg) scale(.72)}72%{opacity:1;transform:translateY(-2px) rotate(3deg) scale(1.08)}to{opacity:1;transform:translateY(0) rotate(0) scale(1)}}@keyframes edcloud-tool-card-arrive{0%{opacity:0;transform:translateY(22px) rotate(1.5deg) scale(.94)}72%{opacity:1;transform:translateY(-3px) rotate(-.5deg) scale(1.012)}to{opacity:1;transform:translateY(0) rotate(0) scale(1)}}@keyframes edcloud-popup-stars-arrive{0%{opacity:0;transform:translateY(18px) rotate(-14deg) scale(.42);filter:blur(5px) brightness(.7)}58%{opacity:1;transform:translateY(-4px) rotate(4deg) scale(1.12);filter:blur(0) brightness(1.18)}to{opacity:.96;transform:translateY(0) rotate(0) scale(1);filter:blur(0) brightness(1)}}@keyframes edcloud-popup-stars-float-a{0%{opacity:.76;transform:translate3d(-8px,8px,0) rotate(-7deg) scale(.92);filter:brightness(.94) drop-shadow(0 0 6px rgba(255,183,103,.44))}to{opacity:1;transform:translate3d(11px,-11px,0) rotate(8deg) scale(1.12);filter:brightness(1.28) drop-shadow(0 0 16px rgba(255,182,111,.82))}}@keyframes edcloud-popup-stars-float-b{0%{opacity:1;transform:translate3d(9px,7px,0) rotate(8deg) scale(1.1);filter:brightness(1.22) drop-shadow(0 0 14px rgba(130,223,207,.7))}to{opacity:.7;transform:translate3d(-11px,-10px,0) rotate(-8deg) scale(.9);filter:brightness(.9) drop-shadow(0 0 5px rgba(255,163,191,.4))}}.effects-quiet .reader-speech-hotspot,.effects-quiet .kids-effect-answer,.effects-quiet :is(.vocabulary-dialog,.info-dialog,.passage-dialog,.media-dialog,.web-tool-dialog,.answer-dialog,.dskp-card),.effects-quiet :is(.vocabulary-language-row,.info-language-row,.passage-article,.passage-summary){animation:none}.effects-quiet .kids-effect-hotspot:before{display:none}@media(max-width:1500px){.reader-popup-mascots{display:none}}@media(max-width:720px){.page-discovery-hint{top:max(8px,env(safe-area-inset-top));left:max(56px,calc(env(safe-area-inset-left) + 56px));max-width:calc(100vw - 64px);min-height:40px;padding:4px 10px 4px 5px;border-radius:14px;font-size:10px}.page-discovery-hint .edcloud-bulb{width:30px;height:30px;border-radius:10px}.page-discovery-copy strong{font-size:10px}.page-discovery-copy small{font-size:8px}.reader-page-interaction-rows p{align-items:flex-start;flex-direction:column;gap:2px}}@media(prefers-reduced-motion:reduce){.side-menu,.pdf-page canvas,.menu-trigger,.reader-audio-button,.reader-audio-restart,.reader-menu-actions>button,.reader-speech-hotspot,.web-tool-popup-gallery>button,.dskp-standard-group,.reader-effect-switch,.reader-effect-switch b{transition:none}.vocabulary-backdrop,.vocabulary-dialog,.info-dialog,.passage-dialog,.media-dialog,.web-tool-dialog,.answer-dialog,.dskp-card,.reader-audio-button[data-audio-state=playing],.menu-trigger .edcloud-bulb img,.reader-speech-hotspot,.reader-kids-ambient span,.page-discovery-hint,.kids-effect-answer,.kids-effect-hotspot:before,.kids-effect-hotspot>:is(span,svg,img),.info-bulb-image,.video-icon-play,.video-icon-spark,.tool-icon-tile,.tool-icon-spark,.info-dialog-heading>.edcloud-bulb,.info-dialog-heading>.edcloud-bulb img,.web-tool-heading-icon,.web-tool-popup-gallery>button,.reader-popup-mascots img,.vocabulary-backdrop:before,.vocabulary-backdrop:after,.vocabulary-language-row,.info-language-row,.passage-article,.passage-summary{animation:none!important}.page-discovery-hint{display:none}.karaoke-word.karaoke-active{will-change:auto}.info-dialog,.passage-dialog{scroll-behavior:auto}.real-flip-book.is-turning .stf__item,.real-flip-book.is-turning :is(.stf__outerShadow,.stf__innerShadow,.stf__hardShadow,.stf__hardInnerShadow){will-change:auto}}
