@import url('data:text/css,');
:root{--ink:#244e42;--green:#326953;--cream:#f8f5e9;--muted:#7a887c;--orange:#ecaa60;--line:#e3e6d8}*{box-sizing:border-box}body{margin:0;color:var(--ink);background:var(--cream);font-family:"Microsoft YaHei","PingFang SC",sans-serif}button{font:inherit;cursor:pointer;color:inherit;-webkit-tap-highlight-color:transparent;touch-action:manipulation}button:focus-visible{outline:3px solid #d7863b;outline-offset:4px}button:disabled{cursor:default}.shell{max-width:1080px;margin:auto;padding:0 42px}header{display:flex;align-items:center;justify-content:space-between;padding:29px 0;border-bottom:1px solid var(--line)}.brand{display:flex;align-items:center;gap:11px;background:none;border:0;text-align:left;font-weight:800;font-size:21px;letter-spacing:1px}.brand small{display:block;font-size:10px;font-weight:400;letter-spacing:3px;margin-top:4px;color:var(--muted)}.brand-icon{font-size:44px;color:var(--green)}.header-actions{display:flex;align-items:center;gap:12px}.pill,.icon-button{border:1px solid #dce2d5;background:#ffffff70;border-radius:24px;min-height:42px;padding:8px 15px;font-size:13px}.icon-button{width:44px;padding:0;font-size:22px}main{min-height:690px}.eyebrow{font-size:11px;letter-spacing:3px;color:#748b75;margin-bottom:16px;font-weight:bold}.hero{position:relative;display:grid;grid-template-columns:1fr 1fr;align-items:center;padding:42px 0 27px;gap:20px}.hero h1{font-size:43px;line-height:1.4;letter-spacing:2px;margin:0 0 18px}.hero h1 em{font-style:normal;color:#c78143;position:relative}.hero p{font-size:14px;line-height:1.9;color:var(--muted);margin:0}.hero-art{position:relative}.hero-art svg{width:100%;height:auto;overflow:visible}.bubble{position:absolute;top:0;right:13%;background:white;padding:9px 17px;border-radius:18px;font-size:12px;box-shadow:0 5px 20px #335c4510;transform:rotate(3deg)}.hero-caption{position:absolute;bottom:0;right:8%;font-size:11px;letter-spacing:2px;color:#79927d}.section-top{display:flex;align-items:center;justify-content:space-between;margin:15px 0 18px}.section-top h2{font-size:18px;margin:0;letter-spacing:1px}.section-top span{font-size:11px;color:var(--muted)}.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.adventure{position:relative;display:block;text-align:left;border:1px solid #d8e2d2;background:#e7eedf;padding:24px;border-radius:22px;min-height:256px;box-shadow:0 5px 0 #dce3d3;transition:transform .2s,box-shadow .2s;overflow:hidden}.adventure:hover{transform:translateY(-4px);box-shadow:0 9px 0 #dce3d3}.adventure:nth-child(2){background:#f6e7d1;border-color:#eadbc3;box-shadow:0 5px 0 #eaddc8}.adventure:nth-child(3){background:#e4edf0;border-color:#d4e2e6;box-shadow:0 5px 0 #d6e3e7}.card-number{font-size:10px;letter-spacing:2px;opacity:.55}.card-art{height:87px;display:flex;align-items:center;justify-content:center;gap:9px;font-family:Georgia,serif;font-size:49px;font-weight:bold;letter-spacing:2px}.letter-leaf{display:inline-block;background:#fff9;border-radius:16px 16px 5px 16px;padding:1px 15px;transform:rotate(-8deg);box-shadow:0 4px 0 #6c8b5c22}.letter-leaf:nth-child(2){transform:rotate(9deg);color:#b27941;margin-top:18px}.adventure h3{font-size:20px;margin:8px 0}.adventure p{font-size:12px;color:#6a7a6d;margin:0;line-height:1.7}.card-bottom{display:flex;justify-content:space-between;align-items:center;margin-top:18px;font-size:10px;color:#6a7a6d}.arrow{border-radius:50%;background:#fff9;width:30px;height:30px;display:grid;place-items:center;font-size:18px}.tip{display:flex;align-items:center;gap:12px;padding:20px 0;font-size:12px;color:#788575}.tip b{color:#708568;font-size:18px}footer{display:flex;justify-content:space-between;align-items:center;border-top:1px solid var(--line);padding:21px 0 30px;font-size:11px;color:var(--muted)}footer button{background:transparent;border:0;font-size:12px}#sticker-count{background:#e5e9da;border-radius:20px;padding:3px 8px;margin-left:5px}.game-top{display:flex;justify-content:space-between;align-items:center;margin:28px 0}.back{border:0;background:transparent;font-size:13px;min-height:44px}.progress{display:flex;gap:7px}.dot{width:25px;height:7px;background:#e1e5d7;border-radius:6px}.dot.done{background:#75a27a}.game-title{text-align:center}.game-title .eyebrow{margin-bottom:9px}.game-title h1{font-size:26px;margin:0 0 10px}.game-title p{font-size:13px;color:var(--muted);margin:0;min-height:22px}.tabs{display:flex;justify-content:center;gap:7px;margin:23px auto 0;flex-wrap:wrap}.tabs button{padding:9px 20px;min-height:44px;border:1px solid #d9e0d2;border-radius:30px;background:transparent;font-size:12px}.tabs button.active{background:var(--green);color:white;border-color:var(--green)}.playground{position:relative;border-radius:26px;background:#e9eedf;min-height:235px;max-width:650px;margin:23px auto 18px;display:flex;flex-direction:column;align-items:center;justify-content:center;overflow:hidden}.playground:before,.playground:after{content:"";position:absolute;background:#d8e3cc;width:380px;height:110px;border-radius:50%;bottom:-70px;left:-60px}.playground:after{left:auto;right:-60px;background:#dfe7d0;bottom:-60px}.animal{font-size:58px;position:relative;line-height:1.3;z-index:1;animation:bob 3s ease-in-out infinite}.listen{position:relative;background:white;border:0;border-radius:50%;height:75px;width:75px;color:var(--green);box-shadow:0 5px 0 #d4dfc8;font-size:31px;margin:10px;z-index:1}.listen.playing{animation:pulse .8s infinite}.listen-label{font-size:11px;color:#6d8066;margin:3px 0 16px;z-index:1}.options{display:grid;grid-template-columns:repeat(2,1fr);gap:13px;max-width:650px;margin:0 auto}.option{position:relative;min-height:100px;border:2px solid #e0e4d6;background:#fffdf5;border-radius:18px;box-shadow:0 4px 0 #e5e6db;font-family:Georgia,"Times New Roman",serif;font-size:38px;font-weight:500;transition:transform .15s}.option:active{transform:translateY(3px)}.option small{display:block;font-family:"Microsoft YaHei",sans-serif;font-size:11px;font-weight:400;color:#839080;margin-top:7px}.option.wrong{animation:shake .3s;border-color:#dfb27b;background:#fff1df}.option.correct{border-color:#659570;background:#dfeeda;box-shadow:0 4px 0 #c0d8b8}.feedback{min-height:40px;margin:17px 0 3px;text-align:center;font-size:14px;color:#6e8064}.primary{background:var(--green);color:white;border:0;border-radius:50px;padding:14px 28px;min-height:49px;box-shadow:0 4px 0 #214e3d;font-size:14px;font-weight:bold}.primary:active{transform:translateY(2px);box-shadow:0 2px 0 #214e3d}.next-wrap{text-align:center;min-height:75px}.full{width:100%}.tone-svg{height:40px;width:110px;display:block;margin:2px auto 9px}.train{font-size:30px;display:flex;align-items:center;gap:9px;margin:15px 0;z-index:1}.wagon{background:#fffaf0;border:2px solid #b9cba8;border-radius:12px;padding:10px 22px;font-family:Georgia,serif;font-size:38px;box-shadow:0 7px 0 #bac9ad}.train-line{position:absolute;bottom:28px;width:100%;border-bottom:3px dashed #bdccad}.result{text-align:center;padding:65px 0 55px;max-width:550px;margin:auto}.result h1{font-size:30px;line-height:1.5}.result p{font-size:14px;line-height:1.9;color:var(--muted)}.sticker-big{width:150px;height:150px;display:grid;place-items:center;font-size:85px;background:#ece8ce;border:8px solid white;border-radius:40%;box-shadow:0 8px 0 #e0dfcd;margin:0 auto 26px;transform:rotate(-7deg)}.result-actions{display:flex;justify-content:center;gap:15px;flex-wrap:wrap;margin:28px 0}.secondary{background:transparent;border:1px solid #b8c5b0;border-radius:40px;padding:13px 25px;min-height:49px}.learn-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin:20px auto 40px;max-width:650px}.learn-grid button{min-height:100px;border:1px solid #dde4d2;background:#fffdf4;border-radius:16px;font-family:Georgia,serif;font-size:32px}.learn-grid small{display:block;font-family:sans-serif;font-size:11px;color:#84907d;margin-top:8px}dialog{border:0;border-radius:24px;background:#fffdf5;color:var(--ink);padding:28px;max-width:460px;width:calc(100% - 36px);box-shadow:0 25px 100px #193d3b44}dialog::backdrop{background:#26463966;backdrop-filter:blur(4px)}dialog h2{font-size:22px;margin-top:0}dialog p,dialog li{font-size:13px;line-height:1.9;color:#72806d}dialog a{color:#326953}.stickers{display:flex;flex-wrap:wrap;gap:12px;margin:22px 0}.sticker{font-size:38px;background:#f0efd9;border-radius:17px;padding:12px}.sticker.locked{filter:grayscale(1);opacity:.25}.stats{display:flex;gap:15px;margin:20px 0}.stats div{background:#e9efdf;padding:15px;border-radius:15px;flex:1;text-align:center;font-size:12px}.stats strong{display:block;font-size:25px;margin-bottom:6px}#confetti{position:fixed;inset:0;pointer-events:none;z-index:50;overflow:hidden}.confetti-bit{position:absolute;top:-20px;width:9px;height:13px;animation:fall 1.8s linear forwards}.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0)}@keyframes fall{to{transform:translateY(110vh) rotate(500deg)}}@keyframes bob{50%{transform:translateY(-5px)}}@keyframes pulse{50%{transform:scale(1.08)}}@keyframes shake{25%{transform:translateX(-6px)}75%{transform:translateX(6px)}}@media(max-width:650px){.shell{padding:0 22px}header{padding:18px 0}.brand{font-size:18px}.brand-icon{font-size:36px}.header-actions{gap:7px}.pill{padding:8px 11px;font-size:11px}.hero{grid-template-columns:1fr;padding:30px 0 10px;gap:0}.hero h1{font-size:32px;line-height:1.45;margin-bottom:12px}.hero p{font-size:12px}.hero-art{width:78%;margin:-13px 0 -2px auto}.bubble{font-size:10px;top:14px;right:0}.hero-caption{font-size:9px;bottom:7px}.eyebrow{font-size:10px;margin-bottom:11px}.section-top{margin:14px 0}.section-top h2{font-size:16px}.section-top span{font-size:10px}.cards{grid-template-columns:1fr;gap:13px}.adventure{min-height:142px;padding:18px 19px 16px 130px;border-radius:19px}.card-number{font-size:9px}.card-art{position:absolute;left:17px;top:33px;width:97px;font-size:34px;height:64px;gap:4px}.letter-leaf{padding:0 10px;border-radius:10px 10px 3px 10px}.adventure h3{font-size:18px;margin:6px 0}.adventure p{font-size:11px}.card-bottom{margin-top:9px;font-size:9px}.arrow{position:absolute;right:16px;top:17px;width:25px;height:25px}.tip{font-size:10px;padding:21px 0;gap:8px}main{min-height:650px}footer{font-size:10px;padding:18px 0 25px}.game-top{margin:18px 0}.game-title h1{font-size:23px}.game-title p{font-size:12px}.playground{min-height:210px;margin-top:20px}.options{gap:12px}.option{min-height:105px;font-size:37px}.game-title .eyebrow{font-size:9px}.tabs{margin-top:18px;gap:5px}.tabs button{padding:8px 14px;font-size:11px}.result{padding-top:45px}.learn-grid{grid-template-columns:repeat(3,1fr)}.hero-art svg{max-height:240px}.hero-art .bubble{top:0}}@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation:none!important;transition:none!important}}
@media(max-width:650px){.hero h1{font-size:27px;letter-spacing:1px}}
.cards{grid-template-columns:repeat(2,1fr)}.word-card{background:#f0e5e8!important;border-color:#e5d6dc!important;box-shadow:0 5px 0 #e6d8df!important}.speed-controls{display:flex;justify-content:center;align-items:center;gap:7px;margin:16px auto;color:#7a887c;font-size:11px}.speed-controls span{margin-right:4px}.speed-controls button,.tone-filter button{border:1px solid #d8e0d0;background:#fffdf5;border-radius:24px;min-height:40px;padding:8px 15px;font-size:12px}.speed-controls button.active,.tone-filter button.active{background:#326953;color:white;border-color:#326953}.tone-filter{display:flex;align-items:center;justify-content:center;gap:6px;flex-wrap:wrap;margin:18px 0;font-size:11px;color:#7a887c}.tone-filter button{padding:8px 12px}.word-label{font-size:18px;font-weight:bold;z-index:1;margin:6px 0 0}.parts-button{z-index:1;border:1px solid #b8c8ab;background:#ffffffb0;border-radius:20px;padding:8px 18px;margin:0 0 16px;min-height:40px;font-size:12px}.word-options .option{font-size:29px;min-height:100px}.tone-study{max-width:650px;margin:30px auto;display:grid;grid-template-columns:repeat(2,1fr);gap:15px}.tone-study .option{padding:18px 10px;font-size:37px}.study-actions{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;margin:25px 0}.word-grid{grid-template-columns:repeat(3,1fr)}.word-grid button{font-family:inherit;padding:16px 6px;font-size:17px}.word-grid small{font-family:Georgia,serif;font-size:18px;color:#617d60}.word-emoji{display:block;font-size:35px;margin-bottom:8px}.word-pinyin{font-family:Georgia,serif;font-size:32px;margin:8px 0 15px}.word-tone-explore{max-width:650px;margin:30px auto}.word-tone-explore p{font-size:12px;color:#7a887c;text-align:center}.word-tone-explore section{padding:10px 0 20px;border-bottom:1px solid #e3e6d8}.word-tone-explore h3{text-align:center;font-size:15px}.word-tone-explore .tabs{margin-top:12px}.word-tone-explore button{font-family:Georgia,serif;font-size:25px;min-width:65px}.word-tone-explore button.correct-tone{background:#dcead4;border-color:#7d9e71}.tip{flex-wrap:wrap}.tip .back{padding:5px;font-size:12px}.playground .word-label+.listen{margin-top:10px}.playground:has(.word-label){padding:16px 0 0}
@media(max-width:650px){.cards{grid-template-columns:1fr}.word-options .option{font-size:27px}.word-grid{grid-template-columns:repeat(2,1fr)}.tone-filter{gap:5px}.tone-filter button{font-size:11px;padding:8px 11px}.tone-study .option{min-height:145px}.word-tone-explore button{min-width:58px;padding:8px 10px}.game-title .animal{font-size:55px}.tip .back{font-size:11px}.playground:has(.word-label){min-height:270px}.word-options{gap:10px}}