@charset "UTF-8";
:root{--ink:#203c40;--muted:#77827c;--yellow:#f7d63d;--butter:#fff5c8;--cream:#fcfbf5;--mint:#dcecdf;--green:#527c60;--line:#e9e9de;--white:#fff;--shadow:0 12px 42px #37452b08;font-family:"Microsoft YaHei UI","PingFang SC","Noto Sans CJK SC",sans-serif;color:var(--ink);background:var(--cream);font-size:15px;font-synthesis:none}*{box-sizing:border-box}body{margin:0}button,input,select,textarea{font:inherit}button,a{-webkit-tap-highlight-color:transparent}a{color:inherit;text-decoration:none}button{cursor:pointer}button:disabled{cursor:not-allowed;opacity:.5}button:focus-visible,a:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible{outline:3px solid #43817b;outline-offset:4px}img{max-width:100%;display:block}h1,h2,h3,p{margin-top:0}p{line-height:1.9}h2{font-size:30px;letter-spacing:-1px}h3{line-height:1.5}small,.muted{color:var(--muted)}.site-header{height:96px;max-width:1320px;padding:0 54px;display:flex;align-items:center;justify-content:space-between;margin:auto;gap:20px}.brand{display:flex;align-items:center;gap:10px;font-size:23px;font-weight:800;letter-spacing:1px}.brand img{width:50px;height:50px;object-fit:cover;border-radius:16px}.brand small{display:block;font-size:10px;letter-spacing:2px;font-weight:500;margin-top:3px}nav{display:flex;gap:34px;font-size:14px}nav a{color:#6b7770;position:relative;padding:16px 0}nav a.active{color:var(--ink);font-weight:700}nav a.active:after{content:"";height:4px;width:20px;background:var(--yellow);position:absolute;bottom:5px;left:calc(50% - 10px);border-radius:4px}.button{border:0;border-radius:13px;padding:14px 24px;background:var(--yellow);font-weight:700;display:inline-flex;align-items:center;justify-content:center;gap:10px;line-height:1.5;transition:transform .16s,box-shadow .16s}.button:hover{transform:translateY(-2px);box-shadow:0 5px 14px 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solid #eeeee4;min-height:244px}.feature:nth-child(2){background:#eef5eb}.feature:nth-child(3){background:#fff4dc}.feature-icon{width:43px;height:43px;background:var(--butter);display:grid;place-items:center;font-size:22px;border-radius:14px;margin-bottom:23px}.feature h3{font-size:18px;margin-bottom:10px}.feature p{font-size:13px;color:#7b8478;line-height:1.85;margin:0}.journey-preview{background:#f1f4e9;border-radius:30px;display:grid;grid-template-columns:.85fr 1.15fr;overflow:hidden;min-height:355px}.journey-copy{padding:48px}.journey-copy h2{line-height:1.5}.journey-copy p{font-size:13px;color:#73806e}.journey-art{position:relative;background:url('/assets/orchard.png') center/cover;min-height:330px}.journey-art .path-dot{position:absolute;width:64px;height:64px;border-radius:50%;background:#fff8db;border:4px solid white;box-shadow:0 5px 0 #dbbd71;display:grid;place-items:center;color:#8b7546;font-size:24px;font-weight:700}.journey-art 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0;color:var(--ink);font-size:13px}.quiz-option>span{width:25px;height:25px;border-radius:8px;background:#f2f3e9;display:grid;place-items:center;flex-shrink:0}.quiz-option.selected{border-color:#70936a;background:#f1f6ec}.quiz-option.correct{border-color:#7b9d69;background:#eef6e7}.feedback{border-radius:13px;padding:17px;background:#fff5d6;font-size:12px;line-height:1.9;margin-top:18px}.feedback.good{background:#e9f4e4}.question-count{font-size:11px;color:#8d977f;margin-bottom:16px}.empty{text-align:center;padding:40px 20px;color:#8b957e;font-size:13px}.empty img{width:80px;border-radius:23px;margin:auto auto 18px}.progress-track{height:7px;background:#edeedf;border-radius:8px;overflow:hidden;margin:17px 0}.progress-track>span{display:block;height:100%;background:#8bae77;border-radius:8px}.record{display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line);padding:17px 0;gap:15px;font-size:12px}.record>div{flex:1}.record 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li{font-size:13px;line-height:2;color:#74806e}.privacy-copy h2{font-size:21px;margin-top:30px}.loading{text-align:center;padding:100px 30px}.loading img{width:80px;border-radius:23px;margin:0 auto 20px}.loading p{font-size:13px;color:#8e977f}dialog{border:0;border-radius:25px;padding:30px;width:min(580px,calc(100% - 28px));max-height:90vh;overflow:auto;box-shadow:0 25px 100px #17382b26;color:var(--ink);background:#fdfcf7}dialog::backdrop{background:#20332866;backdrop-filter:blur(5px)}.modal-head{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-bottom:12px}.modal-head h2{font-size:23px;margin:0}.close{border:0;width:32px;height:32px;border-radius:50%;background:#f0f0e6;font-size:21px;color:#7d8c75}.dialog-footer{display:flex;gap:10px;margin-top:22px;justify-content:flex-end}.toast{position:fixed;bottom:30px;left:50%;transform:translate(-50%,20px);background:#213e38;color:white;box-shadow:0 8px 35px #203c4022;padding:13px 22px;border-radius:13px;font-size:12px;opacity:0;transition:.25s;pointer-events:none;max-width:90vw;z-index:99}.toast.visible{opacity:1;transform:translate(-50%,0)}.photo-canvas{max-height:230px;margin:15px auto;border-radius:12px;max-width:100%;object-fit:contain}.grow-result{text-align:center;padding:25px}.grow-result img{width:135px;height:135px;object-fit:contain;margin:0 auto 20px}.tabline{display:flex;gap:10px;margin-bottom:20px;flex-wrap:wrap}.tabline button{padding:8px 15px;border:1px solid #e0e5d5;border-radius:9px;background:white;color:#7b8873;font-size:12px}.tabline button.selected{background:var(--butter);border-color:#ead782}.api-status{width:7px;height:7px;border-radius:50%;background:#bac1b4;display:inline-block;margin-right:6px}.api-status.ready{background:#78a36d}.error-box{max-width:600px;margin:60px auto;padding:30px;background:#fff1e8;border-radius:20px}.function-graph{width:100%;max-width:440px;height:240px;background:white;border:1px solid #e3e8dd;border-radius:12px}.function-graph text{fill:#839579;font-size:11px}.circuit-lamp{width:80px;height:80px;margin:22px auto;background:#d6ddce;border-radius:50%;display:grid;place-items:center;font-size:35px;transition:background .3s}.circuit-lamp.on{background:#f7d63d;box-shadow:0 0 50px #f5dc7180}.atom-row{display:flex;gap:9px;align-items:center;justify-content:center;margin:25px 0;flex-wrap:wrap}.atom{height:38px;width:38px;border-radius:50%;background:#99c0aa;color:white;display:grid;place-items:center;font-size:12px}.atom.oxygen{background:#e7ac8b}.atom-divider{font-size:24px;margin:0 8px}.leaf-experiment{display:flex;align-items:center;justify-content:center;gap:20px;font-size:45px;padding:20px}.mobile-only{display:none}.download-line{font-size:10px;color:#87917e;margin-top:10px;line-height:1.8}.badge-landing{display:grid;grid-template-columns:1fr 1fr;align-items:center;gap:55px}.badge-landing>img{width:100%;border-radius:25px;mix-blend-mode:multiply}.badge-landing h2{line-height:1.55}.badge-landing p{font-size:13px;color:#7b8673}.badge-label{font-size:12px;color:#8d977c;text-align:center}.next-step{padding:12px 18px;border-radius:10px;background:#f3f5e9;margin:10px 0;color:#829071;font-size:12px}
@media(min-width:1600px){.hero{padding-top:65px;padding-bottom:65px}.hero-art>img{aspect-ratio:1.4}}
@media(max-width:1050px){.site-header{padding:0 28px}nav{gap:22px}.hero{padding:35px 30px;grid-template-columns:1fr 1fr}.hero h1{font-size:40px}.dashboard{grid-template-columns:minmax(0,1fr) 240px}.ribbon{gap:35px}.journey-copy{padding:35px}.cards{gap:15px}.feature{padding:23px}}
@media(max-width:760px){.site-header{height:78px;padding:0 20px;gap:10px}.brand{font-size:20px}.brand img{width:42px;height:42px;border-radius:13px}.brand small{font-size:8px;letter-spacing:1px}.site-header nav{position:fixed;bottom:0;left:0;right:0;height:67px;padding:0 15px 8px;justify-content:space-around;align-items:center;background:#fffef8f7;border-top:1px solid var(--line);backdrop-filter:blur(12px);z-index:20;gap:5px}.site-header nav a{font-size:11px;padding:17px 8px}.site-header>.button{font-size:11px;padding:9px 12px}.hero{display:flex;flex-direction:column;align-items:stretch;padding:26px 24px 27px;gap:27px;margin:0}.hero h1{font-size:38px;margin:17px 0}.hero p{font-size:12px;margin-bottom:22px}.hero-art{padding:0 7px 24px}.hero-art>img{aspect-ratio:1.4;border-radius:27px;box-shadow:none}.float-note{bottom:7px;left:16px;padding:12px 17px}.hero-tag{font-size:10px;margin-top:16px}.ribbon{padding:15px;gap:14px 22px;font-size:10px}.ribbon b{font-size:13px;margin-right:5px}.wrap{padding:0 20px}.section{padding:43px 0}h2{font-size:24px}.section-title{align-items:start}.section-title h2{font-size:23px}.section-title p{font-size:11px}.section-title>.text-button{font-size:11px;white-space:nowrap}.cards,.tools-grid{grid-template-columns:1fr;gap:13px}.feature{padding:23px;min-height:0;display:grid;grid-template-columns:43px 1fr;column-gap:17px}.feature-icon{grid-row:span 2;margin:0}.feature h3{font-size:16px;margin:0 0 8px}.feature p{font-size:12px}.journey-preview{display:flex;flex-direction:column;min-height:0}.journey-copy{padding:29px}.journey-art{min-height:290px}.last-cta{padding:27px;flex-direction:column;align-items:start}.last-cta h2{font-size:22px}.last-cta p{font-size:11px}.dashboard{display:flex;flex-direction:column;gap:20px}.side-stack{display:grid;grid-template-columns:1fr 1fr;gap:14px}.side-stack>.panel:last-child{grid-column:1/-1}.panel{padding:20px}.welcome-panel{gap:14px;padding:19px;min-height:132px}.welcome-panel img{width:79px;height:79px;border-radius:22px}.welcome-panel h2{font-size:19px}.welcome-panel p{font-size:11px}.stats{gap:9px}.stat{padding:13px}.stat strong{font-size:24px}.stat span{font-size:10px}.page-head{padding:27px 0 21px;align-items:start}.page-head h1{font-size:26px}.page-head .button{font-size:10px;padding:9px 12px}.lesson-grid{gap:12px}.lesson-card{padding:18px;min-height:224px}.lesson-card h3{font-size:14px}.lesson-card p{font-size:10px;margin-bottom:15px}.lesson-meta{font-size:9px;margin-bottom:13px}.subject-mark{width:35px;height:35px;border-radius:11px;font-size:18px}.lesson-card .button{font-size:10px}.player-layout{display:flex;flex-direction:column;margin:20px auto 35px;padding:0 18px;gap:16px}.player-steps{flex-direction:row;overflow:auto;gap:5px;padding:0}.player-steps button{white-space:nowrap;font-size:10px;padding:11px 10px}.player-steps b{margin-right:5px}.player-main{padding:23px;min-height:480px}.player-main h1{font-size:23px}.player-main p{font-size:13px}.player-intro img{width:85px}.experiment{padding:18px 12px}.fraction-bar{height:75px}.quiz-option{font-size:12px;padding:13px 12px}.point{font-size:12px;padding:13px}.map-panel{height:490px}.map-node{width:54px;height:54px;font-size:20px}.map-node span{top:68px;font-size:10px}.tools-grid{grid-template-columns:1fr 1fr}.tool-card{padding:19px}.tool-card h3{font-size:14px;margin-top:15px}.tool-card p{font-size:11px}.tool-card .big-symbol{font-size:23px}.privacy-copy{padding:22px;margin:20px}.field-grid{gap:10px}.badges-grid{gap:8px}.badge-tile{padding:9px 5px;font-size:10px}.badge-thumb{width:75px;height:75px}.badge-landing{display:flex;flex-direction:column;gap:22px;align-items:stretch}.badge-landing>img{width:100%;max-width:400px;align-self:center}.badge-landing h2{font-size:24px}footer{padding:27px 20px 93px;gap:20px}footer>div{gap:15px;font-size:10px}.footer-brand span{display:block;margin:8px 0 0}.orange-display>img{height:75px;width:75px}.side-stack h3{font-size:13px}dialog{padding:23px}.dialog-footer{flex-wrap:wrap}.dialog-footer .button{font-size:12px}.toast{bottom:85px;font-size:11px}.mobile-only{display:block}.record{font-size:11px}.area-grid span{height:25px;width:25px}.button{padding:12px 20px;font-size:13px}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}
body.reduced-motion *,body.reduced-motion *::before,body.reduced-motion *::after{animation:none!important;transition:none!important}

@media(max-width:600px){.catalog-table{table-layout:fixed;font-size:11px}.catalog-table td,.catalog-table th{white-space:normal;overflow-wrap:anywhere;padding:11px 4px}.catalog-table td:first-child,.catalog-table th:first-child{width:31%}.catalog-table td:last-child,.catalog-table th:last-child{width:22%;text-align:right}.catalog-table .button.small{padding:8px 9px;font-size:11px}.page-head h1{font-size:27px}}