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#f2e6cc;border-radius:16px;padding:12px;display:flex;flex-direction:column;gap:8px;align-items:flex-start}.mnbox-words{display:flex;gap:8px;flex-wrap:wrap}.mnbox-word{padding:5px 12px;border-radius:999px;background:#eaf5ff;color:#2a5d8f;font-size:14px;font-weight:600}.mnbox-judge{margin:0;color:#b06a00;font-size:14px;font-weight:700}.mnbox-pairline{margin:0;padding:10px 14px;background:linear-gradient(180deg,#fff6d8,#ffedbb);border:2px solid #f0d9a0;border-radius:14px;color:#4a3a2a;font-weight:700;line-height:1.7}.mnbox-btnrow{display:flex;gap:8px;flex-wrap:wrap;align-items:center;margin-top:4px}.mnbox-speak{display:inline-flex;align-items:center;gap:6px;min-height:42px;padding:6px 16px;border:none;border-radius:999px;background:linear-gradient(180deg,#8fd897,#4aa14e);color:#fff;font-weight:800;cursor:pointer;box-shadow:var(--candy-gloss, inset 0 2px 4px rgba(255,255,255,.55)),0 4px #3c784640}.mnbox-speak.is-playing{background:linear-gradient(180deg,#ffd77e,#f5a623);color:#5f3c00}.mnbox-speak:active{transform:translateY(2px)}.mnbox-parent{background:#fffdf6;border:1px dashed #e3d9c6;border-radius:12px;padding:8px 12px;color:#6b5a3a;font-size:14px}.mnbox-parent summary{cursor:pointer;font-weight:700;color:#8a5a17}.mnbox-parent-page{display:grid;gap:16px;max-width:720px}@media(max-width:720px){.mnbox-pair{grid-template-columns:1fr}}@media(max-width:720px){.mnbox-grid{grid-template-columns:1fr}}.unit-pager{display:flex;align-items:center;gap:12px;margin:8px 0;flex-wrap:wrap}.unit-pager-btn{min-height:50px;min-width:116px;padding:8px 18px;border:none;border-radius:999px;background:linear-gradient(180deg,#ffd77e,#ffb340);color:#5f3c00;font-size:16px;font-weight:800;cursor:pointer;box-shadow:var(--candy-gloss, inset 0 2px 4px rgba(255,255,255,.55)),0 5px #96641e40;transition:transform .12s ease,box-shadow .12s ease}.unit-pager-btn:active{transform:translateY(3px);box-shadow:var(--candy-gloss),0 2px #96641e40}.unit-pager-btn:disabled{opacity:.4;cursor:not-allowed}.unit-pager-now{font-weight:800;color:#6b5a3a}.v3-combine{display:flex;flex-direction:column;align-items:center;gap:8px;margin-top:10px;padding:14px 18px;background:linear-gradient(180deg,#e9f4ff,#d8ecff);border:2px solid #a9d3f5;border-radius:18px}.v3-combine b{color:#2a5d8f}.v3-slots{display:flex;gap:14px;align-items:center;justify-content:center;min-height:150px;padding:16px;background:#fff;border:2px solid #f2e6cc;border-radius:18px;touch-action:none;box-sizing:border-box}.v3-slot{width:108px;min-height:112px;display:grid;place-items:center;border:2px dashed #e3d9c6;border-radius:16px;color:#c9bda2;font-size:1.4rem;font-weight:800}.v3-slot.active{border-color:#ffb14d;background:#fff8ea;color:#d98a00}.v3-slot.filled{border-style:solid;border-color:#bfe8c5;background:#f2fbf4}@media(max-width:720px){.v3-slots{flex-wrap:wrap}.v3-slot{width:84px;min-height:92px}}.s1-speaker{align-self:flex-start;border:none;background:#eaf5ff;color:#2a5d8f;border-radius:999px;padding:8px 16px;cursor:pointer;font-size:1rem}.s1-step{background:#fffdf6;border-radius:20px;padding:20px;box-shadow:0 6px 18px #8c6e3c14;box-sizing:border-box;min-height:0}.s1-step h2{margin:0 0 6px}.s1-progress-note{color:#8a7a5c}.s1-gummy{display:inline-grid;place-items:center;font-weight:800;border-radius:18px;line-height:1}.s1-gummy--lg{width:92px;height:92px;font-size:3rem}.s1-gummy--xl{width:128px;height:128px;font-size:4.2rem}.s1-gummy--active{transform:translateY(-6px) scale(1.04);transition:transform .25s}.s1-gummy--wide{width:auto;min-width:92px;padding:0 20px;font-size:2.3rem}.s1-gummy--xl.s1-gummy--wide{min-width:128px;font-size:3rem}.s1-piece path{fill:none;stroke-width:16;stroke-linecap:round}.s1-piece--candy path{stroke:#f5a623}.s1-piece--ghost path{stroke:#e3d9c6}.s1-observe-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin:12px 0}.s1-observe-card{display:flex;flex-direction:column;align-items:center;gap:10px;background:#fff;border:2px solid #f2e6cc;border-radius:18px;padding:16px 10px;cursor:pointer;transition:border-color .2s}.s1-observe-card:hover{border-color:#ffb14d}.s1-observe-hint{color:#b8a888;font-size:.9rem}.s1-observe-detail{display:flex;flex-direction:column;align-items:center;gap:6px}.s1-observe-detail b{color:#6b5a3a;font-size:.95rem}.s1-observe-pieces{display:flex;gap:4px;align-items:center}.s1-letter-tabs{display:flex;gap:8px;margin:10px 0;flex-wrap:wrap}.s1-letter-tab{min-width:52px;padding:8px 14px;border-radius:14px;border:2px solid #f2e6cc;background:#fff;font-size:1.2rem;font-weight:800;color:#9a8a68;cursor:pointer}.s1-letter-tab.on{border-color:#ff9c1a;background:#fff3dd;color:#b06a00}.s1-letter-tab.done{border-color:#74c284;color:#1d6b34}.s1-whole-letter{display:flex;flex-direction:column;align-items:center;gap:12px;margin:14px auto;padding:22px 34px;background:#fff;border:2px dashed #e8c98a;border-radius:20px;cursor:pointer;color:#8a6a2f}.s1-split-stage{display:flex;flex-direction:column;align-items:center;gap:12px}.s1-split-pieces{display:flex;gap:16px;flex-wrap:wrap;justify-content:center}.s1-split-piece{display:flex;flex-direction:column;align-items:center;gap:6px;padding:14px 18px;background:#fff;border:2px solid #f2e6cc;border-radius:16px;cursor:pointer;animation:s1-pop-in .45s ease}.s1-split-piece.heard{border-color:#74c284}.s1-split-piece b{color:#6b5a3a}.s1-tap-hint{color:#b8a888;font-size:.8rem;font-style:normal}.s1-split-summary{color:#6b5a3a;font-weight:600}@keyframes s1-pop-in{0%{transform:scale(.6);opacity:0}to{transform:scale(1);opacity:1}}.s1-task-strip{display:flex;gap:8px;margin:8px 0}.s1-task-chip{padding:6px 14px;border-radius:999px;border:2px solid #f2e6cc;background:#fff;color:#9a8a68;cursor:pointer}.s1-task-chip.on{border-color:#ff9c1a;background:#fff3dd;color:#b06a00}.s1-task-chip.done{border-color:#74c284;color:#1d6b34}.s1-question{font-size:1.05rem;font-weight:700;color:#5a4a2f}.s1-choice-row{display:flex;gap:18px;margin:10px 0}.s1-choice{background:none;border:3px solid transparent;border-radius:22px;padding:4px;cursor:pointer}.s1-choice.right{border-color:#74c284}.s1-choice.wrong{border-color:#e07a7a}.s1-rule-list{margin:10px 0 0;padding-left:20px;color:#4a6b3a;font-weight:600}.s1-hotspot-stage{max-width:320px;margin-bottom:32px}.s1-lettershape{width:100%;aspect-ratio:152 / 252;background:#fff;border-radius:16px;border:2px solid #f2e6cc;box-sizing:border-box}.s1-lettershape-stroke{fill:none;stroke:#f5a623;stroke-width:16;stroke-linecap:round}.s1-hot{fill:#ffffff03;cursor:pointer}.s1-hot--hit{fill:#74c28447;stroke:#74c284;stroke-width:2}.s1-hot-num circle{fill:#fffdf6;stroke:#d8c9a8;stroke-width:2}.s1-hot-num text{font-size:14px;font-weight:800;fill:#9a8a68;text-anchor:middle}.s1-hot-num.on circle{fill:#74c284;stroke:#4aa14e}.s1-hot-num.on text{fill:#fff}.s1-hot-legend{display:flex;gap:10px;justify-content:center;margin-top:10px;flex-wrap:wrap}.s1-hot-chip{padding:6px 14px;border-radius:999px;background:#fffdf6;border:2px solid #f2e6cc;color:#8a7a5c;font-size:.95rem}.s1-hot-chip.on{background:#e6f6e8;border-color:#9ed6a8;color:#1d6b34;font-weight:700}.s1-target-letter{font-size:1.3rem;color:#b06a00}.s1-assemble-layout{display:flex;gap:20px;align-items:flex-start;margin:12px 0}.s1-board-wrap{flex:0 0 320px}.s1-board{width:100%;aspect-ratio:1;background:#fff;border-radius:16px;border:2px solid #f2e6cc;touch-action:none}.s1-board-done{display:flex;flex-direction:column;align-items:center;gap:10px;padding:30px;background:#fff;border-radius:16px;border:2px solid #bfe8c5;color:#1d6b34}.s1-fuse .s1-board-done{animation:s1-pop-in .5s ease}.s1-slot{fill:none;stroke:#e3d9c6;stroke-width:14;stroke-linecap:round;stroke-dasharray:4 10}.s1-slot--filled{display:none}.s1-board-ink{fill:none;stroke:#f5a623;stroke-width:16;stroke-linecap:round}.s1-tray{display:flex;flex-wrap:wrap;gap:12px;flex:1;touch-action:none}.s1-tray-piece{display:flex;flex-direction:column;align-items:center;gap:4px;padding:12px 16px;background:#fff;border:2px solid #f2e6cc;border-radius:14px;cursor:grab;color:#6b5a3a;touch-action:none}.s1-tray-piece:active{cursor:grabbing;border-color:#ffb14d}.s1-drag-ghost{position:fixed;z-index:60;pointer-events:none;transform:translate(-50%,-60%);opacity:.85}.s1-write-slot{display:flex;gap:10px;align-items:baseline;background:#fff3dd;border-radius:12px;padding:8px 14px;margin:8px 0;color:#6b5a3a}.s1-write-slot b{color:#b06a00}.s1-write-pads{display:flex;gap:20px;margin-top:14px}.s1-write-pad{flex:1;max-width:320px}.s1-write-pad h3{margin:0 0 4px}.s1-write-pad p{margin:0 0 8px;color:#8a7a5c;font-size:.9rem}.s1-traceboard svg{width:100%;aspect-ratio:1;touch-action:none;background:#fff;border-radius:14px;border:2px solid #f2e6cc}.s1-trace-line{stroke:#d9e6f2;stroke-width:2}.s1-trace-shadow{fill:none;stroke:#eadfc8;stroke-width:14;stroke-linecap:round}.s1-trace-ink{fill:none;stroke:#e0862a;stroke-width:10;stroke-linecap:round;stroke-linejoin:round}.s1-trace-foot{display:flex;justify-content:space-between;align-items:center;margin-top:6px}.s1-trace-verdict{margin:8px 0 0;padding:8px 12px;border-radius:12px;font-size:.95rem}.s1-trace-verdict--good{background:#e6f6e8;color:#1d6b34;font-weight:700}.s1-trace-verdict--progress{background:#fff3dd;color:#8a5a17}.s1-trace-verdict--issue{background:#eaf5ff;color:#2a5d8f}.s1-listen-explain{background:#fff;border-radius:14px;border:2px solid #f2e6cc;padding:12px 16px;margin:8px 0}.s1-listen-explain p{margin:4px 0;color:#5a4a2f}.s1-paper-demo{background:#eaf5ff;color:#2a5d8f;border-radius:12px;padding:8px 14px;margin:8px 0}.s1-listen-cards{display:flex;gap:16px;flex-wrap:wrap;margin:10px 0}.s1-listen-card{display:flex;flex-direction:column;align-items:center;gap:8px;background:#fff;border:2px solid #f2e6cc;border-radius:16px;padding:14px 18px;flex:1;min-width:220px;max-width:320px}.s1-follow-read{display:flex;flex-direction:column;align-items:center;gap:6px;text-align:center}.s1-follow-read small{color:#8a7a5c}.s1-practice-count{color:#8a7a5c;font-weight:700;margin-bottom:4px}.s1-practice-question{display:flex;gap:12px;align-items:center;flex-wrap:wrap}.s1-practice-parts{display:flex;align-items:center;gap:8px;background:#fff;border:2px solid #f2e6cc;border-radius:14px;padding:10px 16px;margin:8px 0;width:fit-content}.s1-practice-part{display:flex;align-items:center;gap:8px}.s1-practice-part b{color:#b06a00;font-size:1.4rem}.s1-grid-hint{width:200px;background:#fff;border-radius:14px;border:2px solid #f2e6cc;margin:8px 0}.s1-grid-glow{fill:#ffb14d40}.s1-grid-label{font-size:15px;fill:#b06a00;font-weight:700;text-anchor:middle}.s1-reward{text-align:center}.s1-medal{font-size:4.5rem;animation:s1-pop-in .6s ease}.s1-reward-stars{font-size:1.1rem;color:#d98a00;font-weight:700}.s1-reward-letters{display:flex;gap:10px;justify-content:center;margin:10px 0}.s1-reward-note{color:#8a5a17}.s1-reward .s1-rule-list{display:inline-block;text-align:left}.s1-reward-actions{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;margin-top:16px}.s1-reward-actions a{text-decoration:none}@media(max-width:720px){.s1-observe-grid{grid-template-columns:repeat(2,1fr)}.s1-gummy--xl{width:104px;height:104px;font-size:3.4rem}.s1-assemble-layout{flex-direction:column}.s1-board-wrap{flex:none;width:100%;max-width:320px;align-self:center}.s1-write-pads{flex-direction:column}.s1-write-pad{max-width:none}}*{box-sizing:border-box}@font-face{font-family:Fredoka;src:url(/fonts/fredoka-latin.woff2) format("woff2");font-weight:400 600;font-display:swap;unicode-range:U+0020-00FF}@font-face{font-family:ZCOOL KuaiLe;src:url(/fonts/zcool-kuaile-cn.woff2) format("woff2");font-weight:400;font-display:swap}:root{color:#5a4a3a;background:#fff5e6;font-family:Fredoka,ZCOOL KuaiLe,Microsoft YaHei,PingFang SC,Noto Sans SC,system-ui,sans-serif;--font-round: "Fredoka", "Microsoft YaHei", "PingFang SC", system-ui, sans-serif;--font-cute: "Fredoka", "ZCOOL KuaiLe", "Microsoft YaHei", "PingFang SC", system-ui, sans-serif;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;--sky: #4ea8de;--sky-strong: #287fb4;--cream: #ffe08a;--cream-soft: #fff3c4;--grass: #70c878;--grass-soft: #dff6e3;--coral: #ff8a65;--coral-soft: #ffe2d8;--rice: #fff5e6;--paper: #fffaf2;--card: #faf0e6;--ink: #5a4a3a;--muted: #8a765f;--line: #ecdcc4;--edge: rgba(120, 80, 40, .22);--candy-radius-lg: 22px;--candy-radius-md: 16px;--candy-border: rgba(120, 80, 40, .16);--candy-shadow: 0 6px 18px rgba(140, 110, 60, .1);--candy-gloss: inset 0 2px 4px rgba(255, 255, 255, .55);--nav-w: 220px;--ink-strong: #4a3a2a;--shadow: 0 16px 34px rgba(120, 80, 40, .14);--jimu-radius: 18px;--cat-shengmu: #f5a623;--cat-shengmu-d: #d98a12;--cat-danyun: #4fc3f7;--cat-danyun-d: #2ba7e0;--cat-fuyun: #66bb6a;--cat-fuyun-d: #4aa14e;--cat-zhengti: #ab47bc;--cat-zhengti-d: #8e35a0;--cat-tone: #e53935}body{margin:0;min-width:320px;min-height:100vh}button,input,select,textarea{font:inherit}button,a{-webkit-tap-highlight-color:transparent}a{color:inherit;text-decoration:none}h1,h2,h3,p{margin-top:0}h1{font-size:clamp(28px,3vw,36px)}h2{font-size:clamp(22px,2.4vw,28px)}h3{font-size:clamp(18px,2vw,22px)}small{font-size:14px}p{color:var(--muted);line-height:1.7;font-size:clamp(16px,1.5vw,18px)}.done-chip{display:inline-flex;align-items:center;gap:6px;padding:6px 14px;border-radius:999px;background:linear-gradient(180deg,#a9e4b1,#74c284);color:#14532b;font-weight:700;box-shadow:var(--candy-gloss),0 4px #3c784638}.done-chip:before{content:"✓"}ul,ol{padding-left:1.2rem}.app-shell{min-height:100vh;display:grid;grid-template-columns:var(--nav-w) minmax(0,1fr);background:linear-gradient(180deg,#fff5e6,#ffe8d6)}.app-main{width:100%;min-height:100vh;padding:24px 24px 34px}@media(max-width:768px){.app-main{padding:16px 16px 24px}}.app-main--full{grid-column:1 / -1;padding:0}.responsive-nav{position:sticky;top:0;height:100vh;padding:22px 16px;background:#ffffffc7;border-right:1px solid var(--line);-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px);display:flex;flex-direction:column;gap:20px;z-index:5}.brand-lockup{display:flex;gap:12px;align-items:center;min-height:56px;padding:8px;border-radius:18px}.brand-icon{width:48px;height:48px;display:grid;place-items:center;border-radius:16px;background:var(--sky);color:#fff;font-size:28px;font-weight:900;box-shadow:0 12px 24px #4ea8de3d}.brand-lockup strong,.brand-lockup small{display:block}.brand-lockup small{color:var(--muted);margin-top:2px}.nav-section{display:grid;gap:8px}.nav-section--utility{margin-top:auto}.nav-item{min-height:58px;display:flex;align-items:center;gap:10px;padding:8px 12px;border-radius:20px;color:var(--muted);font-family:var(--font-cute);font-size:17px;white-space:nowrap;font-weight:400}.nav-item--active{color:var(--ink-strong);background:linear-gradient(180deg,#fff3d6,var(--cream-soft));box-shadow:inset 0 2px 5px #fffc,0 6px 14px #78502824}.nav-mark{width:44px;height:44px;display:grid;place-items:center;border-radius:16px;background:linear-gradient(180deg,#fff6e2,#ffe4ad);box-shadow:inset 0 2px 4px #ffffffd9,0 5px 11px #78502829;font-size:23px;line-height:1}.nav-item--active .nav-mark{background:linear-gradient(180deg,#ffe7a0,var(--cream))}.page-stack{max-width:1100px;margin:0 auto;display:grid;gap:22px}.page-stack--narrow{max-width:900px}@media(max-width:1200px){.page-stack{max-width:1000px}}@media(max-width:1000px){.page-stack{max-width:900px}}@media(max-width:768px){.page-stack{max-width:100%}}.start-page{min-height:100vh;padding:28px;display:grid;align-content:start;gap:24px}.park-hero{width:min(1220px,100%);margin:0 auto;min-height:620px;display:grid;grid-template-columns:minmax(320px,.78fr) minmax(420px,1.22fr);gap:24px;align-items:stretch;position:relative;border:5px solid var(--edge);border-radius:44px;padding:24px;overflow:hidden;background:linear-gradient(180deg,#ffffffb8,#fffdf799),linear-gradient(135deg,#dff3ff,#fff1b8 54%,#ffe0d6);box-shadow:0 12px #7850281f,0 28px 60px #2c50682e}.park-hero:before{content:"";position:absolute;top:18px;right:18px;bottom:18px;left:18px;border:3px dashed rgba(120,80,40,.18);border-radius:34px;pointer-events:none}.park-hero--start{min-height:min(760px,calc(100vh - 96px))}.park-copy{position:relative;z-index:2;display:grid;align-content:center;gap:18px;padding:18px}.park-label{width:fit-content;min-height:42px;display:inline-flex;align-items:center;padding:0 16px;border:3px solid var(--edge);border-radius:18px 18px 22px;background:#ff8fba;color:#fff;font-weight:900;box-shadow:0 6px #78502824;rotate:-2deg}.park-copy h1{margin:0;color:var(--ink-strong);font-size:clamp(46px,7vw,92px);line-height:.98;text-shadow:0 5px 0 #fff1b8,0 10px 0 rgba(120,80,40,.08)}.park-copy p{max-width:620px;margin:0;color:#314d61;font-size:clamp(18px,2vw,24px);font-weight:800;line-height:1.55}.park-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:8px}.quest-button{min-height:64px;display:inline-flex;align-items:center;justify-content:center;border:none;border-radius:22px;padding:0 26px;color:#fff;font-family:var(--font-round);font-size:20px;font-weight:800;box-shadow:inset 0 4px 8px #ffffff80,0 9px 16px #78502847;cursor:pointer;transition:transform .12s ease,box-shadow .12s ease}.quest-button--primary{background:linear-gradient(180deg,#ffc25e,#f5a623)}.quest-button--soft{background:linear-gradient(180deg,#fff3d9,#ffe6bb);color:#7a5a2a}.quest-button:hover{transform:translateY(-3px)}.quest-button:active{transform:translateY(3px);box-shadow:inset 0 3px 6px #fff6,0 4px 8px #78502840}.park-stage{position:relative;min-height:570px;border:5px solid var(--edge);border-radius:38px;overflow:hidden;background:linear-gradient(180deg,#9edcff 0,#9edcff 58%,#9fe7d7 58%,#9fe7d7);box-shadow:inset 0 0 0 8px #ffffff5c,0 10px #7850281f}.park-sky{position:absolute;top:0;right:0;bottom:38%;left:0;overflow:hidden}.paper-cloud{position:absolute;height:54px;border:4px solid var(--edge);border-radius:999px;background:#fffdf7;box-shadow:0 6px #7850281f}.paper-cloud:before,.paper-cloud:after{content:"";position:absolute;bottom:-4px;border:4px solid var(--edge);border-bottom:0;border-radius:999px 999px 0 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#d6dfbd;border-radius:18px;overflow:hidden;touch-action:none}.bpdq-drawpad-guide{position:absolute;top:0;right:0;bottom:0;left:0;display:grid;place-items:center;color:#f0647d38;font:900 104px Fredoka,sans-serif;pointer-events:none;-webkit-user-select:none;user-select:none}.bpdq-drawpad canvas{display:block;width:100%;height:100%;touch-action:none;cursor:crosshair}.bpdq-practice-box .ghost-button{padding:6px 12px;font-size:12px}.bpdq-writing-note b,.bpdq-notice b{color:#187536}.bpdq-listen-grid{display:grid;grid-template-columns:repeat(4,minmax(150px,1fr));gap:12px}.bpdq-listen-card{display:grid;justify-items:center;align-content:start;gap:12px}.bpdq-listen-card .read-aloud{width:100%}.bpdq-listen-card .read-aloud-btn{width:100%;padding-inline:8px;font-size:12px}.bpdq-pair-note{margin:0;color:#657264;text-align:center;font-size:13px}.bpdq-reward{justify-items:center;padding:26px;border-radius:26px;background:radial-gradient(circle at 50% 10%,#fffef4,#eef9de);text-align:center}.bpdq-medal{font-size:76px;filter:drop-shadow(0 7px 3px rgba(160,112,20,.22))}.bpdq-reward h2{margin:0;color:#26813d}.bpdq-reward p{margin:0;color:#66705d}.bpdq-stars{color:#f2b523;font-size:34px;letter-spacing:8px;text-shadow:0 2px 0 #d28b08}.bpdq-learning-summary{display:grid;gap:5px;padding:15px 24px;border:2px solid #a8d78d;border-radius:18px;background:#fff;color:#37663d}.bpdq-learning-summary b{color:#21803a;font-size:18px}.lesson-step-nav{display:flex;align-items:center;justify-content:space-between;gap:14px;margin-top:18px;width:100%}.lesson-step-nav .primary-button{margin-left:auto}.lesson-step-nav .primary-button:disabled,.lesson-step-nav .ghost-button:disabled{opacity:.4;cursor:not-allowed;transform:none;box-shadow:none}.lesson-step-nav .primary-button.is-ready{animation:lesson-ready 1.25s ease-in-out 2}@keyframes lesson-ready{50%{transform:translateY(-2px);box-shadow:0 7px color-mix(in srgb,var(--sky) 68%,#235f87)}}@media(max-width:820px){.bpdq-overview{grid-template-columns:1fr}.bpdq-letter-grid,.bpdq-listen-grid{grid-template-columns:repeat(2,1fr)}.bpdq-pieces{flex-wrap:wrap;gap:12px}.bpdq-builder,.bpdq-writing-layout{grid-template-columns:1fr}}@media(max-width:520px){.bpdq-letter-grid{gap:8px}.bpdq-observe{min-height:0}.bpdq-letter-grid--focus{grid-template-columns:repeat(2,1fr)}.bpdq-observe-card{min-height:215px}.bpdq-observe-card .bpdq-gummy{width:82px;height:102px;font-size:94px}.bpdq-letter-card{padding:10px 5px}.bpdq-gummy{width:65px;height:86px;font-size:78px}.bpdq-gummy--small{width:48px;height:63px;font-size:58px}.bpdq-compare-grid{grid-template-columns:1fr}.bpdq-palette{grid-template-columns:repeat(2,1fr)}.bpdq-piece-controls{grid-template-columns:1fr}.bpdq-listen-grid{grid-template-columns:1fr 1fr}.bpdq-listen-card{padding:10px 5px}.bpdq-stars{font-size:26px;letter-spacing:4px}}.license-card{border:1px solid var(--line);border-radius:16px;background:var(--paper);padding:18px}.license-head{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:8px}.license-head h2{font-size:16px;margin:0;color:var(--ink)}.license-badge{font-size:12px;font-weight:800;padding:4px 10px;border-radius:999px;white-space:nowrap}.license-badge--none{background:var(--cream-soft);color:#8a6d1a}.license-badge--active{background:var(--grass-soft);color:#2f7a3a}.license-badge--expired{background:var(--coral-soft);color:#b64a2a}.license-label{display:block;font-size:13px;color:var(--muted);margin:12px 0 6px}.license-row{display:flex;gap:8px}.license-input{flex:1;box-sizing:border-box;padding:12px;border:1px solid var(--line);border-radius:10px;font-size:15px;letter-spacing:1px;background:var(--rice);color:var(--ink)}.license-copy{padding:0 16px;border:1px solid var(--line);border-radius:10px;background:var(--paper);color:var(--ink);cursor:pointer;font-size:14px}.license-activate{width:100%;margin-top:14px;padding:14px;border:0;border-radius:12px;background:var(--sky);color:#fff;font-size:16px;font-weight:800;cursor:pointer}.license-activate:disabled{opacity:.6;cursor:default}.license-msg{margin:10px 0 0;font-size:13px;color:var(--sky-strong);font-weight:700}.license-help{margin:12px 0 0;font-size:12px;color:var(--muted);line-height:1.6}@keyframes whale-bob{0%,to{transform:translateY(0)}50%{transform:translateY(-8px)}}.lock-loading{min-height:60vh}.lock-screen{align-items:center}.lock-card{max-width:460px;margin:40px auto;text-align:center;background:linear-gradient(180deg,#fffdf7,#fff5df);border:3px solid var(--edge);border-radius:28px;padding:32px 24px;box-shadow:0 10px 26px #7850281f}.lock-emoji{font-size:56px;line-height:1}.lock-card h1{font-family:var(--font-cute);font-size:24px;color:var(--ink-strong);margin:10px 0 12px}.lock-sub{color:var(--muted);font-size:15px;line-height:1.7;margin:0 0 22px}.lock-actions{display:flex;flex-direction:column;align-items:center;gap:12px}.lock-actions .quest-button{padding:12px 22px;font-size:17px}.lock-parent-link{color:var(--muted);font-weight:700;text-decoration:none;font-size:14px}.lock-wechat{margin:20px 0 0;padding:12px 14px;background:#7ac1421f;border:1px dashed #bfe294;border-radius:14px;font-size:13px;font-weight:700;color:var(--muted);line-height:1.6}.lock-wechat b{display:inline-block;margin:0 4px;padding:2px 8px;background:#fff;border-radius:8px;color:#4a7a2e;-webkit-user-select:all;user-select:all}.quest-lesson--locked{opacity:.72}.quest-lesson--locked .quest-lesson-name{color:var(--muted)}.quest-lock-tag{margin-left:auto;font-size:11px;font-weight:800;color:#b08636;background:#fdf1d6;border:1px solid #f0d69a;border-radius:999px;padding:3px 9px;white-space:nowrap}