:root{--paper:#f8f7f2;--white:#fffefa;--ink:#304c40;--muted:#7c897f;--green:#3c7058;--green-dark:#29563f;--line:#e5e7dc;--orange:#df9767;--yellow:#f7d98b;--sidebar:238px;font-family:'Noto Sans SC','Microsoft YaHei',sans-serif;color:var(--ink);background:var(--paper);font-synthesis:none}
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#ece4cc}.book-illustration{display:flex;background:#e1eadd}.book-illustration .story-art{height:100%;object-fit:contain}.book-text{position:relative;padding:55px 32px;display:flex;flex-direction:column;align-items:flex-start;justify-content:center;border-left:1px solid #d9d7bc;box-shadow:inset 12px 0 20px -15px #77735b30}.book-text h1{font-family:Georgia,serif;font-size:35px;line-height:1.4;max-width:330px;letter-spacing:-.5px;margin-bottom:22px}.book-text p{font-size:14px;color:#9e987c}.page-number{position:absolute;top:20px;right:22px;color:#c7bfa6;font-family:Georgia,serif;font-size:20px}.audio-example{display:flex;align-items:center;gap:9px;font-size:12px;color:#729064;background:#e7ebd9;border-radius:25px;padding:12px 15px;margin-top:20px;min-height:44px}.audio-example .icon{width:17px}.book-text small{font-size:8px;margin-top:11px;color:#ada68f}.reader-controls{display:flex;align-items:center;justify-content:space-between;margin-top:22px}.page-dots{display:flex;gap:4px}.page-dots button{width:28px;height:44px;position:relative;padding:0}.page-dots button:after{content:'';position:absolute;width:6px;height:6px;border-radius:50%;background:#d9ddcb;inset:19px 11px}.page-dots button.active:after{background:var(--green);width:16px;left:6px}.reading-options{display:flex;justify-content:space-between;align-items:center;gap:15px;margin-top:12px}.reading-options>span{font-size:10px;color:#9ba38d}.word-layout{display:grid;grid-template-columns:1.2fr 1fr;gap:50px;align-items:center;margin-top:35px}.word-card-area{text-align:center;background:#eeeede;border-radius:25px;padding:25px}.flashcard{display:flex;flex-direction:column;align-items:center;justify-content:center;background:var(--white);border:1px solid #e5e4d7;box-shadow:0 9px 0 #d7ddc7;margin:25px 0 28px;width:100%;min-height:340px;border-radius:22px;padding:30px}.word-emoji{font-size:90px;line-height:1.3}.flashcard h2{font-family:Georgia,'Microsoft YaHei',serif;font-size:42px;letter-spacing:2px;margin:20px 0 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strong{font-family:Georgia,serif;font-size:36px;color:#72905d}.growth-stats span,.subtle{font-size:10px;color:#99a18c}.garden-empty{padding:35px}dialog{border:1px solid #dfe4d2;background:var(--white);color:var(--ink);border-radius:25px;padding:37px;width:min(510px,calc(100% - 32px));max-height:calc(100dvh - 48px);overflow:auto;box-shadow:0 25px 100px #253b2840}dialog::backdrop{background:#263c345c;backdrop-filter:blur(5px)}#modal-content{position:relative}.close-dialog{position:absolute;right:-18px;top:-22px;border-radius:50%;width:44px;height:44px;color:#8e9984;font-size:26px;z-index:1}.media-dialog,.profile-dialog,.finish-dialog{text-align:center}.media-dialog h2,.parent-dialog h2,.profile-dialog h2,.finish-dialog h2{font-size:25px;margin:10px 0 20px}.media-dialog h3{font-size:18px;margin-bottom:12px}.media-dialog p,.parent-dialog p,.profile-dialog p,.finish-dialog p{color:#8c987f;font-size:12px;line-height:2}.media-placeholder{position:relative;border-radius:16px;overflow:hidden;margin:22px 0}.media-placeholder .story-art{max-height:230px}.media-placeholder>span{position:absolute;inset:0;display:grid;place-items:center;font-size:40px;background:#ffffff22}.parent-fact{padding:18px;background:#f0f3e7;border-radius:12px;margin-bottom:15px}.parent-fact strong{font-size:13px}.parent-fact p{font-size:11px;margin:8px 0 0}.parent-dialog>.primary{margin-top:10px}.dialog-emoji{font-size:45px;display:block;margin-bottom:15px}.profile-bear{font-size:80px;background:#efe7d6;border-radius:50%;display:grid;place-items:center;width:130px;height:130px;margin:10px auto 25px}.finish-flower{font-size:100px;display:block;margin:15px 0 25px}.finish-dialog .text-button{display:block;margin:15px auto 0}.finish-dialog .primary{margin-top:12px}#toast{position:fixed;left:calc(50% + var(--sidebar)/2);bottom:30px;transform:translate(-50%,15px);background:#304c40ee;color:#fffdf0;padding:14px 24px;border-radius:13px;font-size:12px;max-width:85vw;text-align:center;pointer-events:none;opacity:0;transition:opacity .2s,transform .2s;z-index:50;line-height:1.7}#toast.show{opacity:1;transform:translate(-50%,0)}.mobile-only{display:none}
@media(min-width:1600px){main{padding-top:45px}.hero{min-height:390px}.hero-copy{padding:43px}.hero h2{font-size:38px}.hero-copy p{font-size:13px}.hero-art .story-art{max-height:430px}.story-grid{gap:25px}.card-title{padding:22px}.card-title h3{font-size:17px}.card-meta{font-size:10px}}
@media(max-width:1150px){:root{--sidebar:190px}.sidebar{padding:30px 17px 20px}.brand{font-size:19px;gap:8px}.brand-icon{width:35px;height:39px;font-size:28px}.brand small{font-size:5px;letter-spacing:.7px}.nav-item{padding:0 14px;font-size:12px;gap:11px}.side-caption{margin-left:10px;font-size:10px}.topbar{margin:0 30px;height:78px}main{padding:30px}.greeting h1{font-size:23px}.hero-copy{padding:28px 0 25px 28px}.hero h2{font-size:27px}.hero{min-height:310px}.daily-row{gap:15px}.daily-tip{padding:16px 13px;gap:10px}.daily-tip strong{font-size:11px}.daily-tip p{font-size:9px}.story-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}.card-title h3{font-size:16px}.card-meta{font-size:10px}.cover-button .story-art{aspect-ratio:1.6}.library-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.mode-grid{grid-template-columns:repeat(2,1fr)}.lesson-intro{gap:25px}.lesson-copy h1{font-size:26px}.lesson-copy .primary{font-size:11px}.save-lesson{margin-left:4px}.book-stage{min-height:340px}.book-text{padding:45px 22px}.book-text h1{font-size:29px}.word-layout{gap:25px}.word-card-area{padding:20px}.word-aside h2{font-size:25px}.word-controls button{padding:10px;font-size:10px}.garden-hero{padding:25px;gap:20px}.garden-hero h2{font-size:22px}}
@media(min-width:700px) and (max-width:950px){:root{--sidebar:92px}.sidebar{padding:28px 11px 18px}.brand{justify-content:center}.brand>span:last-child,.side-caption,.side-garden,.parent-link>span:last-child{display:none}.brand-icon{width:43px;height:46px;font-size:33px}.sidebar .navigation{margin-top:55px;gap:14px}.sidebar .nav-item{flex-direction:column;justify-content:center;gap:8px;font-size:9px;padding:12px 0;min-height:73px;border-radius:14px}.nav-item i{display:none}.parent-link{margin-top:auto;font-size:9px;flex-direction:column;gap:7px;justify-content:center}.parent-link>span:first-child{font-size:21px}.hero h2{font-size:25px}.hero-copy{padding-left:25px}.hero-art .story-art{transform:scale(1.12)}.note-one{top:20%;font-size:9px;left:2%}.daily-row{grid-template-columns:1fr 1fr}.mini-cover{width:54px;height:60px}.continue-card{gap:10px;padding:10px}.continue-card h3{font-size:12px}.round-play{width:31px;height:31px}.daily-tip{gap:9px}.tip-icon{font-size:27px}.daily-tip p{line-height:1.8}.lesson-intro{grid-template-columns:.9fr 1fr;gap:25px}.lesson-copy .primary{padding:12px}.save-lesson{display:block;margin:6px 0 0}.book-stage{grid-template-columns:1fr;min-height:0}.book-illustration{max-height:330px}.book-illustration .story-art{max-height:330px}.book-text{padding:30px;min-height:220px;border-left:0;border-top:1px solid #ddd8bf}.book-text h1{max-width:none;font-size:33px;margin-bottom:10px}.audio-example{margin-top:12px}.word-layout{grid-template-columns:1.2fr 1fr;gap:22px}.flashcard{min-height:320px}.word-emoji{font-size:70px}.word-controls{gap:5px}.word-controls button{padding:10px 8px;font-size:9px}.word-aside h2{font-size:23px}.garden-hero{grid-template-columns:.7fr 1fr}.garden-picture{font-size:95px}}
@media(max-width:699px){:root{--sidebar:0px}.sidebar{display:none}.workspace{margin:0}.topbar{height:76px;margin:0 22px}.top-date{display:none}.mobile-brand{display:block;font-size:21px;font-weight:800;letter-spacing:1px;color:var(--green)}.top-actions{gap:10px}.prototype-badge{font-size:8px;padding:5px 8px}.avatar{width:36px;height:36px;font-size:22px}main{padding:27px 21px 16px;min-height:calc(100dvh - 230px)}.greeting{margin-bottom:22px}.greeting .eyebrow{font-size:8px;letter-spacing:1.5px}.greeting h1{font-size:21px;line-height:1.6;letter-spacing:.2px;margin:7px 0}.greeting .wave{font-size:22px}.greeting p{font-size:11px}.greeting>.text-button{display:none}.hero{grid-template-columns:1fr;min-height:0;border-radius:22px;overflow:hidden}.hero-copy{padding:25px 23px 0}.hero .pill{font-size:9px;padding:6px 10px}.hero h2{font-size:28px;line-height:1.6;margin:16px 0 11px}.hero-copy p{font-size:11px;margin-bottom:18px;line-height:1.9}.mobile-only{display:block}.hero .primary{min-height:45px;font-size:12px}.hero-foot{display:none}.hero-art{height:195px;margin-top:-25px;margin-left:90px;pointer-events:none}.hero-art .story-art{max-height:none;width:100%;height:100%;transform:scale(1.1);object-fit:contain}.floating-note{padding:7px 9px;font-size:9px}.note-one{left:0;top:23%}.note-two{right:5%;bottom:5%}.daily-row{grid-template-columns:1fr;gap:0;margin-top:18px}.continue-card{padding:12px 14px;border-radius:15px;gap:15px}.mini-cover{width:61px;height:61px}.continue-card h3{font-size:14px}.continue-card .eyebrow{font-size:8px}.continue-card p{font-size:9px}.round-play{width:38px;height:38px}.daily-tip{border:0;background:none;padding:17px 5px 0;gap:10px}.tip-icon{font-size:24px}.daily-tip strong{font-size:11px}.daily-tip p{font-size:9px;display:inline;margin-left:8px}.stories-section{margin-top:29px}.section-heading{margin-bottom:15px;gap:8px}.section-heading h2{font-size:20px;margin-top:5px}.section-heading .eyebrow{font-size:7px;letter-spacing:1.4px}.section-heading>.text-button{font-size:10px;gap:4px}.section-heading .text-button .icon{width:14px}.level-tabs{gap:4px;margin-bottom:17px;flex-wrap:nowrap;overflow:auto;scrollbar-width:none}.level-tabs button{padding:8px 11px;min-height:39px;font-size:9px}.story-grid,.library-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:13px}.story-card{border-radius:15px}.cover-button .story-art{aspect-ratio:1.17}.level-label{top:9px;left:8px;font-size:7px;padding:5px 7px}.favorite{width:29px;height:29px;right:8px;bottom:8px}.favorite .icon{width:15px;height:15px}.card-title,.library-grid .card-title{padding:13px 11px}.series-name,.library-grid .series-name{font-size:7px;letter-spacing:0}.card-title h3,.library-grid .card-title h3{font-size:13px;margin:8px 0 13px;letter-spacing:.1px}.card-meta,.library-grid .card-meta{font-size:7px;gap:4px}.card-meta>span{gap:3px}.card-meta .icon{width:10px;height:10px}.explore-strip{margin-top:23px;padding:18px 15px;gap:12px;border-radius:15px}.explore-strip>div{grid-template-columns:25px 1fr;column-gap:9px}.explore-strip>div>span{font-size:22px}.explore-strip strong{font-size:11px}.explore-strip p{font-size:8px;line-height:1.8;max-width:145px}.explore-strip .secondary{font-size:9px;padding:10px;gap:5px;white-space:nowrap}.explore-strip .icon{width:14px}.page-footer{font-size:8px;padding:22px 10px calc(103px + env(safe-area-inset-bottom));letter-spacing:.5px}.page-footer span{margin:0 8px}.bottom-nav{position:fixed;bottom:0;left:0;right:0;display:grid;grid-template-columns:repeat(4,1fr);gap:0;padding:8px 9px calc(8px + env(safe-area-inset-bottom));background:#fffdf7f5;border-top:1px solid #e4e7d9;backdrop-filter:blur(16px);z-index:10}.bottom-nav .nav-item{flex-direction:column;justify-content:center;gap:6px;font-size:9px;border-radius:13px;padding:8px 1px;min-height:59px}.bottom-nav .nav-item .icon{width:22px;height:22px}.bottom-nav .nav-item.active{color:var(--green);background:#edf1e4;box-shadow:none}.bottom-nav .nav-item i{display:none}.page-heading{margin:1px 0 24px}.page-heading h1{font-size:28px;letter-spacing:1px}.page-heading p{font-size:11px;line-height:1.9}.page-heading .eyebrow{font-size:8px}.library-tools{gap:8px;margin-bottom:17px}.search{padding:0 11px;gap:8px;min-width:0}.search input{font-size:11px;min-height:46px;min-width:0}.search .icon{width:16px}.filter-favorite{font-size:10px;padding:0 10px;gap:5px;white-space:nowrap;min-height:46px}.filter-favorite .icon{width:15px}.result-label{font-size:9px;margin:0 0 18px;gap:12px}.result-label span{font-size:8px}.back-link{font-size:11px;margin-bottom:17px}.lesson-intro{grid-template-columns:1fr;gap:27px;margin-bottom:32px}.lesson-cover{max-width:400px;width:88%;margin:auto;transform:rotate(-2deg);border-radius:22px}.lesson-cover .story-art{aspect-ratio:1.6}.lesson-copy h1{font-size:29px;margin-top:14px}.english-title{font-size:21px!important}.lesson-copy p{font-size:12px}.lesson-tags{margin:17px 0}.save-lesson{margin-left:12px;display:inline-flex;align-items:center}.mode-grid{gap:12px}.mode-card{padding:20px 16px;min-height:168px}.mode-card strong{font-size:16px}.mode-card p{font-size:9px;max-width:100px}.mode-card>.icon{top:23px;right:14px;width:14px}.demo-note{font-size:9px}.reader-top{font-size:10px;flex-wrap:wrap}.reader-top .text-button{font-size:9px}.reader{margin-top:10px;border-radius:17px;padding:14px}.reader-meta{margin-bottom:14px;font-size:10px}.reader-meta .pill{font-size:8px;padding:6px 8px}.book-stage{grid-template-columns:1fr;min-height:0}.book-illustration{height:240px}.book-illustration .story-art{height:100%;object-fit:contain}.book-text{padding:32px 23px 25px;min-height:230px;border-left:0;border-top:1px solid #e2ddc6}.book-text h1{font-size:30px;margin-bottom:15px;max-width:260px}.book-text p{font-size:12px;margin-bottom:10px}.page-number{font-size:16px;top:12px;right:14px}.audio-example{font-size:11px;margin-top:13px;padding:10px 13px}.book-text small{font-size:8px}.reader-controls{margin-top:17px;gap:3px}.reader-controls>.secondary,.reader-controls>.primary{font-size:10px;padding:10px 12px;min-height:44px;border-radius:10px}.page-dots{gap:0}.page-dots button{width:22px}.page-dots button:after{left:8px}.page-dots button.active:after{left:3px}.reading-options{align-items:flex-start;margin-top:10px}.reading-options>span{font-size:9px;max-width:180px;line-height:1.8;padding-top:12px}.word-layout{grid-template-columns:1fr;gap:27px;margin-top:0}.word-card-area{padding:21px;border-radius:22px}.flashcard{min-height:310px}.word-emoji{font-size:80px}.flashcard h2{font-size:40px}.word-controls button{font-size:11px;padding:11px 13px}.word-aside h2{font-size:25px}.word-aside h2 br{display:none}.word-aside .word-list{margin:18px 0}.word-aside>p{font-size:11px}.garden-hero{grid-template-columns:1fr;padding:23px;gap:12px}.garden-picture{min-height:190px;font-size:105px}.garden-hero h2{font-size:24px}.garden-hero p{font-size:11px}.growth-stats{padding:23px 8px;gap:0}.growth-stats strong{font-size:31px}.growth-stats span{font-size:8px}.section-heading .subtle{font-size:8px}.empty{padding:35px 20px}.empty h3{font-size:19px}.empty p{font-size:11px}dialog{padding:30px 25px;border-radius:22px;max-height:calc(100dvh - 45px)}.close-dialog{right:-17px;top:-22px}.media-dialog h2,.parent-dialog h2,.profile-dialog h2,.finish-dialog h2{font-size:23px}.parent-fact{padding:16px}.media-dialog p,.parent-dialog p,.profile-dialog p,.finish-dialog p{font-size:11px}.finish-flower{font-size:85px}#toast{left:50%;bottom:calc(95px + env(safe-area-inset-bottom));width:max-content;max-width:90vw;font-size:11px}}
@media(max-width:360px){main{padding:23px 15px}.topbar{margin:0 15px}.greeting h1{font-size:19px}.hero h2{font-size:25px}.hero-copy{padding-left:20px}.level-tabs button{padding:8px 9px;font-size:8px}.card-meta{font-size:6px}.daily-tip p{display:block;margin:5px 0 0}.reader-controls>.primary,.reader-controls>.secondary{font-size:9px;padding:10px}.page-dots button{width:18px}.page-dots button:after{left:6px}.page-dots button.active:after{left:1px}.book-text h1{font-size:27px}.prototype-badge{display:none}}
.real-cover{object-fit:contain!important;background:#fffef8}.lesson-cover .real-cover{aspect-ratio:1.414}.real-page{border-radius:12px;background:#eeeede;overflow:auto;text-align:center;max-height:72vh;min-height:240px}.real-page img{display:block;width:100%;max-height:70vh;object-fit:contain;margin:auto;background:white}.real-page.zoomed img{width:1600px;max-width:none;max-height:none}.page-selector{display:flex;align-items:center;gap:8px;font-size:11px;color:#8a987e}.page-selector select{font:inherit;color:var(--ink);background:#fffef6;border:1px solid #dce2cf;border-radius:9px;padding:10px;min-height:44px}.real-media video{display:block;width:100%;max-height:60vh;border-radius:14px;background:#14251c;margin:20px 0}.real-media audio{width:100%;margin:0 0 23px}.real-media h3{margin-top:20px}dialog:has(.real-media){width:min(860px,calc(100% - 32px))}#reading-audio-dock{max-width:750px;margin:12px auto 0;padding:17px 24px;background:#e9eedf;border:1px solid #dce3d0;border-radius:16px}#reading-audio-dock[hidden]{display:none}#reading-audio-dock>span{font-size:11px;display:block;margin-bottom:12px;color:#718565}#reading-audio-dock audio{width:100%;display:block} .real-reader .reader-meta{gap:8px;flex-wrap:wrap}@media(max-width:699px){#reading-audio-dock{margin:10px 21px 0;padding:15px}.real-page{min-height:0;max-height:65vh}.real-page img{max-height:65vh}.real-page.zoomed img{width:1100px;max-height:none}.page-selector{font-size:9px;gap:4px}.page-selector select{padding:8px}.real-reader .reader-controls{gap:5px}.real-reader .reader-meta .text-button{font-size:10px}.real-media h2{font-size:21px}}
.synced-book-layout{display:grid;grid-template-columns:minmax(0,1.65fr) minmax(250px,1fr);gap:18px;align-items:start}.sentence-panel{min-width:0;background:#f1f3e8;border:1px solid #e0e6d3;border-radius:16px;padding:18px}.sentence-panel-title{display:flex;justify-content:space-between;gap:10px;font-size:13px;font-weight:600;align-items:center}.sentence-panel-title small{font-size:9px;color:#92a083;font-weight:400}.sync-toolbar{display:flex;flex-wrap:wrap;align-items:center;gap:4px 12px;padding:12px 0;border-bottom:1px solid #dce3ce;margin-bottom:9px}.sync-toolbar .secondary{font-size:11px;min-height:44px;width:100%;padding:10px}.sync-toolbar label{font-size:10px;display:flex;align-items:center;gap:5px;min-height:40px;color:#6f855f;cursor:pointer}.sync-toolbar input{width:17px;height:17px;accent-color:var(--green);margin:0}.sync-toolbar select{font:inherit;color:var(--green);background:#fffdf5;border:1px solid #d9e0ca;padding:8px 5px;min-height:36px;border-radius:8px}.sentence-list{display:flex;flex-direction:column;gap:7px;max-height:48vh;overflow:auto}.sentence{display:flex;align-items:center;gap:9px;text-align:left;width:100%;background:#fffdf4;border:2px solid transparent;border-radius:12px;padding:13px 10px;min-height:52px;font-family:Georgia,serif;font-size:17px;line-height:1.6}.sentence .icon{width:17px;height:17px;color:#98a68b}.sentence-speaker{display:grid;place-items:center;flex-shrink:0}.sentence-state{font-family:'Microsoft YaHei',sans-serif;font-size:8px;white-space:nowrap;color:#a1aa90;margin-left:auto}.sentence.is-current{background:#e3edce;border-color:#8eac6b;color:#355b3d;box-shadow:0 3px 10px #607d3610}.sentence.is-current .icon,.sentence.is-current .sentence-state{color:#557c3c}.sentence:hover{background:#eaf0db}.sentence-empty{font-size:12px;line-height:2;color:#8d9c7c;margin:17px 0}.synced-book-layout .real-page{min-height:0}.real-reader .reading-options{font-size:10px}@media(max-width:1200px){.synced-book-layout{grid-template-columns:1fr}.sentence-list{max-height:none;display:grid;grid-template-columns:repeat(2,minmax(0,1fr))}.sync-toolbar .secondary{width:auto}.sync-toolbar{gap:7px 20px}.sentence-panel{padding:16px}.synced-book-layout .real-page img{max-height:52vh}}@media(max-width:699px){.synced-book-layout{gap:13px}.sentence-panel{padding:13px}.sentence-panel-title{font-size:12px}.sentence-panel-title small{font-size:8px}.sentence-list{display:flex}.sentence{font-size:18px;min-height:58px;padding:13px 10px}.sync-toolbar{gap:3px 13px}.sync-toolbar .secondary{width:100%;font-size:11px}.sync-toolbar label{font-size:10px}.synced-book-layout .real-page img{max-height:46vh}.real-reader .reading-options>span{font-size:9px}.sentence-state{font-size:8px}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{transition:none!important;animation:none!important;scroll-behavior:auto!important}}

/* Shared brand image */
.brand-logo{display:block;object-fit:contain;flex-shrink:0;border-radius:20%}.brand>.brand-logo{width:48px;height:48px}.mobile-brand>.brand-logo{display:inline-block;width:36px;height:36px;vertical-align:middle;margin-right:7px}