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.paper{background:var(--c-card);border-color:#ffffff0f}.theme-space .btn-primary{box-shadow:0 0 12px #00d2ff4d}.theme-space .btn-primary:active:not(:disabled){box-shadow:0 0 8px #00d2ff33}.theme-candy{--c-paper: #fff5f8;--c-paper-deep: #ffe8ee;--c-card: #fffafc;--c-ink: #4a3040;--c-ink-2: #7a5a6a;--c-ink-3: #a8889a;--c-leaf: #2ecc71;--c-leaf-deep: #27ae60;--c-leaf-soft: #e8faf0;--c-gold: #f1c40f;--c-gold-deep: #d4ac0d;--c-gold-soft: #fef9e7;--c-clay: #e91e63;--c-clay-deep: #c2185b;--c-clay-soft: #fce4ec;--c-sky: #00bcd4;--c-sky-soft: #e0f7fa;--c-grape: #9c27b0;--c-grape-soft: #f3e5f5;--c-subject-math: #00bcd4;--c-subject-math-soft: #e0f7fa;--c-subject-chinese: #e91e63;--c-subject-chinese-soft: #fce4ec;--c-subject-english: #2ecc71;--c-subject-english-soft: #e8faf0;--c-subject-science: #9c27b0;--c-subject-science-soft: #f3e5f5;--c-line: rgba(74, 48, 64, .1);--shadow-paper: 0 1px 0 0 rgba(233, 30, 99, .04), 0 3px 0 0 rgba(233, 30, 99, .03), 0 14px 28px -16px rgba(233, 30, 99, .2)}.theme-candy .paper{border-color:#e91e630f}.theme-custom{--c-leaf: var(--custom-leaf, #5a9d6b);--c-leaf-deep: var(--custom-leaf, #5a9d6b);--c-leaf-soft: color-mix(in srgb, var(--custom-leaf, #5a9d6b) 12%, white);--c-gold: var(--custom-gold, #e8a735);--c-gold-deep: var(--custom-gold, #e8a735);--c-gold-soft: color-mix(in srgb, var(--custom-gold, #e8a735) 10%, white);--c-clay: var(--custom-clay, #d98a6e);--c-clay-deep: var(--custom-clay, #d98a6e);--c-clay-soft: color-mix(in srgb, var(--custom-clay, #d98a6e) 10%, white);--c-paper: var(--custom-paper, #faf6ee);--c-paper-deep: var(--custom-paper, #faf6ee);--c-card: white;--c-ink: var(--custom-ink, #37352f);--c-ink-2: color-mix(in srgb, var(--custom-ink, #37352f) 60%, white);--c-ink-3: color-mix(in srgb, var(--custom-ink, #37352f) 35%, white);--c-sky: var(--custom-leaf, #5a9d6b);--c-sky-soft: color-mix(in srgb, var(--custom-leaf, #5a9d6b) 10%, white);--c-grape: var(--custom-gold, #e8a735);--c-grape-soft: color-mix(in srgb, var(--custom-gold, #e8a735) 8%, white);--c-line: color-mix(in srgb, var(--custom-ink, #37352f) 10%, white);--shadow-paper: 0 1px 0 0 rgba(0,0,0,.03), 0 3px 0 0 rgba(0,0,0,.02), 0 14px 28px -16px rgba(0,0,0,.15)}:root{--eye-care-enabled: 0;--eye-care-saturation: .75;--eye-care-particles: .5;--eye-care-animation-speed: 1.5;--eye-care-brightness: .95;--eye-care-blue-light-filter: 0;--sleep-mode-time: 0}.eye-care-active{--eye-care-enabled: 1}.eye-care-active,.eye-care-active .app-shell{--c-leaf: color-mix(in srgb, #5a9d6b 75%, #8fa878);--c-leaf-deep: color-mix(in srgb, #3e7c4f 75%, #6d8557);--c-leaf-soft: color-mix(in srgb, #eaf5e8 80%, #f0f2e2);--c-gold: color-mix(in srgb, #f0b44a 75%, #e0a458);--c-gold-deep: color-mix(in srgb, #d49a2e 75%, #bd8534);--c-gold-soft: color-mix(in srgb, #fdf4dc 80%, #f9efd8);--c-clay: color-mix(in srgb, #e07a5f 75%, #d98a6e);--c-clay-deep: color-mix(in srgb, #c4614a 75%, #b96e50);--c-clay-soft: color-mix(in srgb, #fbeee8 80%, #f7ece2);--c-sky: color-mix(in srgb, #6ba3c7 75%, #8ba0b5);--c-sky-soft: color-mix(in srgb, #ebf2f9 80%, #edf1f2);--c-grape: color-mix(in srgb, #9b7fc0 75%, #a894bc);--c-grape-soft: color-mix(in srgb, #f3eef9 80%, #f2ecf4);--c-subject-math: color-mix(in srgb, #6ba3c7 75%, #8ba0b5);--c-subject-math-soft: color-mix(in srgb, #ebf2f9 80%, #edf1f2);--c-subject-chinese: color-mix(in srgb, #e07a5f 75%, #d98a6e);--c-subject-chinese-soft: color-mix(in srgb, #fbeee8 80%, #f7ece2);--c-subject-english: color-mix(in srgb, #5a9d6b 75%, #8fa878);--c-subject-english-soft: color-mix(in srgb, #eaf5e8 80%, #f0f2e2);--c-subject-science: color-mix(in srgb, #9b7fc0 75%, #a894bc);--c-subject-science-soft: color-mix(in srgb, #f3eef9 80%, #f2ecf4);--c-paper: color-mix(in srgb, #faf8f3 90%, #f6efe2);--c-paper-deep: color-mix(in srgb, #f5f0e6 90%, #efe5d2);--c-card: color-mix(in srgb, #fffcf8 95%, #faf3e6);--c-ink: color-mix(in srgb, #3d4540 85%, #45403a);--c-ink-2: color-mix(in srgb, #6b7568 85%, #75695a);--c-ink-3: color-mix(in srgb, #9ca398 85%, #a3968a);--c-line: rgba(58, 64, 53, .08);--shadow-paper: 0 1px 0 0 rgba(58, 64, 53, .04), 0 3px 0 0 rgba(58, 64, 53, .03), 0 14px 28px -16px rgba(58, 64, 53, .25);--shadow-paper-sm: 0 1px 0 0 rgba(58, 64, 53, .03), 0 8px 18px -12px rgba(58, 64, 53, .22)}.eye-care-active .anim-pet{animation-duration:calc(3.2s * var(--eye-care-animation-speed))}.eye-care-active .anim-wiggle{animation-duration:calc(2.4s * var(--eye-care-animation-speed))}.eye-care-active .anim-bob{animation-duration:calc(4.5s * var(--eye-care-animation-speed))}.eye-care-active .anim-pop{animation-duration:calc(.45s * var(--eye-care-animation-speed))}.eye-care-active .particle,.eye-care-active .sparkle,.eye-care-active .confetti{opacity:calc(.5 * var(--eye-care-particles));animation-duration:calc(2s * var(--eye-care-animation-speed))}.eye-care-active .btn-primary,.eye-care-active .btn-gold,.eye-care-active .btn-clay{filter:saturate(var(--eye-care-saturation)) brightness(var(--eye-care-brightness))}.eye-care-active .anim-pulse-ring,.eye-care-active .rec-live{animation:none}@media(prefers-color-scheme:dark){:root{--sleep-mode-time: 1;--eye-care-saturation: .65;--eye-care-particles: .3;--eye-care-animation-speed: 1.8;--eye-care-brightness: .85;--eye-care-blue-light-filter: .15}.auto-eye-care{--eye-care-enabled: 1}.auto-eye-care .app-shell{filter:sepia(var(--eye-care-blue-light-filter)) saturate(var(--eye-care-saturation))}}@media(prefers-color-scheme:light){:root{--sleep-mode-time: 0;--eye-care-saturation: .75;--eye-care-particles: .5;--eye-care-animation-speed: 1.5;--eye-care-brightness: .95;--eye-care-blue-light-filter: 0}}.eye-care-active,.eye-care-active .app-shell{transition:filter .8s ease,background-color .8s ease,color .8s ease}.eye-care-active .paper,.eye-care-active .btn,.eye-care-active .chip{transition:filter .8s ease,background-color .8s ease,border-color .8s ease,color .8s ease}.eye-care-active.theme-warm{--eye-care-saturation: .6;--c-leaf: color-mix(in srgb, #8fa878 70%, #6d8557);--c-gold: color-mix(in srgb, #e0a458 70%, #bd8534);--c-clay: color-mix(in srgb, #d98a6e 70%, #b96e50)}.eye-care-active.theme-space,.eye-care-active.theme-camp{--c-ink: #d8d8e8;--c-ink-2: #a8a8bc;--c-ink-3: #78789a}.eye-care-toggle{position:relative;display:inline-flex;align-items:center;gap:.5rem;padding:.5rem 1rem;border-radius:999px;background:var(--c-card);border:2px solid var(--c-line);cursor:pointer;transition:all .2s ease}.eye-care-toggle:hover{border-color:var(--c-leaf);background:var(--c-leaf-soft)}.eye-care-toggle.active{background:var(--c-leaf);border-color:var(--c-leaf-deep);color:#fff}.eye-care-indicator{width:2rem;height:1.1rem;border-radius:999px;background:#3a403526;position:relative;transition:background-color .2s ease}.eye-care-indicator:after{content:"";position:absolute;width:.9rem;height:.9rem;border-radius:50%;background:#fff;top:.1rem;left:.1rem;transition:transform .2s ease;box-shadow:0 1px 3px #0003}.eye-care-active .eye-care-indicator{background:var(--c-leaf)}.eye-care-active .eye-care-indicator:after{transform:translate(.9rem)}.app-shell[class*=theme-]{transition:background-color .8s ease,color .8s ease}.app-shell[class*=theme-] .paper,.app-shell[class*=theme-] .btn,.app-shell[class*=theme-] .chip{transition:background-color .8s ease,border-color .8s ease,color .8s ease}.density-compact{--ui-btn-primary: 56px;--ui-btn-secondary: 44px;--ui-font-size: 15px;--ui-max-options: 5}.density-compact .paper{padding:.75rem 1rem}.density-compact .panel-title{font-size:.9rem}.density-compact .display{font-size:.95rem}.density-compact .display-lg{font-size:1.1rem}.density-comfortable{--ui-btn-primary: 72px;--ui-btn-secondary: 56px;--ui-font-size: 18px;--ui-max-options: 4}.motion-reduced .anim-pet,.motion-reduced .anim-wiggle,.motion-reduced .anim-bob,.motion-reduced .anim-pop{animation:none!important}.motion-reduced .paper,.motion-reduced .btn,.motion-reduced .chip{transition-duration:.1s!important}*,*:before,*:after{box-sizing:border-box}html{-webkit-text-size-adjust:100%}body{margin:0;font-family:var(--font-body);color:var(--c-ink);transition:background-color 1.2s ease,color 1.2s ease;background-color:var(--c-paper);background-image:radial-gradient(1200px 600px at 85% -10%,rgba(233,161,59,.16),transparent 60%),radial-gradient(900px 500px at -10% 30%,rgba(94,141,99,.14),transparent 55%),radial-gradient(700px 400px at 110% 60%,rgba(217,106,79,.08),transparent 60%),url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='28' height='28'%3E%3Ccircle cx='1' cy='1' r='1' fill='%233a4035' fill-opacity='0.05'/%3E%3C/svg%3E"),url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='180' height='180' filter='url(%23n)' opacity='0.05'/%3E%3C/svg%3E");background-attachment:fixed;-webkit-font-smoothing:antialiased;line-height:1.6;touch-action:manipulation;-webkit-tap-highlight-color:transparent}::selection{background:var(--c-gold-soft);color:var(--c-gold-deep)}:focus-visible{outline:3px solid var(--c-gold);outline-offset:2px;border-radius:6px}button{font-family:inherit;cursor:pointer;-webkit-user-select:none;user-select:none}input,select,textarea{font-family:inherit}::-webkit-scrollbar{width:12px;height:12px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:#3a40352e;border-radius:999px;border:3px solid transparent;background-clip:padding-box}::-webkit-scrollbar-thumb:hover{background:#3a40354d;border:3px solid transparent;background-clip:padding-box}.display{font-family:var(--font-display);font-weight:400;letter-spacing:.02em}.display-2xl{font-size:2rem;line-height:1.25}.display-xl{font-size:1.6rem;line-height:1.3}.display-lg{font-size:1.35rem;line-height:1.35}.display-md{font-size:1.15rem;line-height:1.4}.quiz-quote{font-family:var(--font-body);font-weight:700}.paper{position:relative;background:var(--c-card);border:2px solid var(--c-line);border-radius:1.8rem;box-shadow:var(--shadow-paper);padding:1.15rem}.paper-sm{padding:.9rem;border-width:1.5px;box-shadow:var(--shadow-paper-sm)}.paper-leaf{background:var(--c-leaf-soft);border-color:#3e7c4f40}.paper-gold{background:var(--c-gold-soft);border-color:#e9a13b4d}.paper-clay{background:var(--c-clay-soft);border-color:#d96a4f47}.paper-sky{background:var(--c-sky-soft);border-color:#5b8db83d}.paper-grape{background:var(--c-grape-soft);border-color:#8a6fb03d}.paper-muted{background:#fffdf68c;border-style:dashed}.panel-title{display:flex;align-items:center;gap:.55rem;font-family:var(--font-display);font-size:1.08rem;color:var(--c-ink)}.panel-title:before{content:"";width:.55rem;height:.55rem;border-radius:50%;background:currentColor;box-shadow:0 0 0 3px #fff9;flex:none}.panel-title-gold{color:var(--c-gold-deep)}.panel-title-leaf{color:var(--c-leaf-deep)}.panel-title-clay{color:var(--c-clay-deep)}.panel-title-sky{color:var(--c-sky)}.panel-title-grape{color:var(--c-grape)}.panel-hint{margin-top:.2rem;font-size:.86rem;color:var(--c-ink-2);line-height:1.6}.btn{display:inline-flex;align-items:center;justify-content:center;gap:.5rem;border-radius:999px;font-family:var(--font-display);font-weight:400;letter-spacing:.04em;border:0;transition:transform .12s ease,box-shadow .12s ease,filter .15s ease,background-color .15s ease;touch-action:manipulation;text-decoration:none;-webkit-tap-highlight-color:transparent}.btn:active:not(:disabled){transform:translateY(2px)}.btn:disabled{opacity:.45;cursor:not-allowed}.btn-primary{height:var(--ui-btn-primary);min-height:72px;padding:0 1.6rem;color:#fff;background:var(--c-leaf);box-shadow:0 3px 0 0 var(--c-leaf-deep),0 8px 16px -8px #3e7c4f66;font-size:1.18rem}.btn-primary:active:not(:disabled){box-shadow:0 1px 0 0 var(--c-leaf-deep),0 4px 10px -6px #3e7c4f59}.btn-secondary{height:var(--ui-btn-secondary);min-height:48px;padding:0 1.3rem;color:var(--c-leaf-deep);background:var(--c-leaf-soft);box-shadow:0 3px #3e7c4f59;font-size:1rem}.btn-secondary:active:not(:disabled){box-shadow:0 1px #3e7c4f4d}.btn-gold{height:var(--ui-btn-secondary);min-height:52px;padding:0 1.4rem;color:#fff;background:var(--c-gold);box-shadow:0 3px 0 0 var(--c-gold-deep),0 8px 16px -8px #d49a2e66;font-size:1.08rem}.btn-gold:active:not(:disabled){box-shadow:0 1px 0 0 var(--c-gold-deep),0 4px 10px -6px #d49a2e59}.btn-clay{height:var(--ui-btn-secondary);min-height:52px;padding:0 1.4rem;color:#fff;background:var(--c-clay);box-shadow:0 3px 0 0 var(--c-clay-deep),0 8px 16px -8px #c4614a66;font-size:1.08rem}.btn-clay:active:not(:disabled){box-shadow:0 1px 0 0 var(--c-clay-deep),0 4px 10px -6px #c4614a59}.btn-sky{height:var(--ui-btn-secondary);min-height:52px;padding:0 1.4rem;color:#fff;background:var(--c-sky);box-shadow:0 3px color-mix(in srgb,var(--c-sky) 62%,#26425a),0 8px 16px -8px #6ba3c766;font-size:1.08rem}.btn-sky:active:not(:disabled){box-shadow:0 1px color-mix(in srgb,var(--c-sky) 62%,#26425a),0 4px 10px -6px #6ba3c759}.btn-leaf{height:var(--ui-btn-secondary);min-height:52px;padding:0 1.4rem;color:#fff;background:var(--c-leaf);box-shadow:0 3px 0 0 var(--c-leaf-deep),0 8px 16px -8px #3e7c4f66;font-size:1.08rem}.btn-leaf:active:not(:disabled){box-shadow:0 1px 0 0 var(--c-leaf-deep),0 4px 10px -6px #3e7c4f59}.btn-ghost{height:var(--ui-btn-secondary);min-height:48px;padding:0 1.3rem;color:var(--c-ink-2);background:var(--c-leaf-soft);border:2px solid rgba(62,124,79,.2);font-size:1rem;box-shadow:0 3px #3e7c4f40}.btn-ghost:active:not(:disabled){background:var(--c-leaf-soft)}.btn-white{height:var(--ui-btn-secondary);min-height:48px;padding:0 1.3rem;color:var(--c-ink);background:var(--c-card);box-shadow:0 3px #3a40351f;font-size:1rem}.btn-sm{height:44px;min-height:44px;padding:0 1.1rem;font-size:.92rem}.btn-row{display:flex;gap:.6rem}.btn-row .btn{height:var(--ui-btn-primary);min-height:64px;flex:1}.btn-row .btn-ghost{background:var(--c-leaf-soft);border-color:transparent;color:var(--c-leaf-deep);box-shadow:0 3px #3e7c4f4d}.btn-row .btn-ghost:active:not(:disabled){background:var(--c-leaf-soft)}.btn-round{border-radius:50%;display:inline-flex;align-items:center;justify-content:center;flex:none}.chip{display:inline-flex;align-items:center;gap:.35rem;min-height:44px;padding:.4rem .9rem;border-radius:999px;background:var(--c-card);border:2px solid var(--c-line);color:var(--c-ink-2);font-size:.95rem;font-weight:600;box-shadow:var(--shadow-paper-sm);transition:transform .15s ease,background-color .15s ease,color .15s ease,border-color .15s ease;touch-action:manipulation}.chip:active{transform:translateY(2px)}.chip-leaf{background:var(--c-leaf);border-color:var(--c-leaf-deep);color:#fff}.chip-gold{background:var(--c-gold);border-color:var(--c-gold-deep);color:#fff}.chip-clay{background:var(--c-clay);border-color:var(--c-clay-deep);color:#fff}.chip-sky{background:var(--c-sky);border-color:var(--c-sky-deep, #4a7fa0);color:#fff}.chip-soft{background:var(--c-leaf-soft);border-color:#3e7c4f33;color:var(--c-leaf-deep)}.sticker{display:inline-flex;align-items:center;justify-content:center;border-radius:999px;background:var(--c-card);border:2px solid 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