:root{--cqa-ink:#17231c;--cqa-muted:#657169;--cqa-paper:#f5f1e8;--cqa-card:#fffdf8;--cqa-green:#28785a;--cqa-deep:#17372e;--cqa-mint:#dcece3;--cqa-gold:#c98424;--cqa-gold-soft:#f6e5c8;--cqa-line:#ddd6c9}
.cqa-lab{color:var(--cqa-ink);background:radial-gradient(circle at 10% 5%,#fff9e9 0,transparent 22%),linear-gradient(145deg,#eef5ed,#f5f1e8 62%,#eee5d8);font-family:Inter,"Microsoft YaHei","PingFang SC",sans-serif;min-height:70vh;padding:34px 0 76px}.cqa-lab *{box-sizing:border-box}.cqa-lab-shell{width:min(1180px,calc(100% - 34px));margin-left:auto;margin-right:auto}.cqa-lab-hero{padding:46px;border-radius:30px;color:white;background:radial-gradient(circle at 85% 12%,#4f9a77 0,transparent 32%),linear-gradient(145deg,#1c493a,#17372e);box-shadow:0 24px 60px rgba(32,69,53,.18)}.cqa-lab-hero h1{color:#fff;margin:10px 0 4px;font-size:clamp(34px,5vw,64px);line-height:1.08}.cqa-lab-kicker{color:#b8d7c9;font-size:12px;font-weight:750;letter-spacing:.16em}.cqa-lab-cn-title{margin:8px 0 18px;color:#f2c76e;font-size:clamp(22px,3vw,32px)}.cqa-lab-hero>p:last-of-type{max-width:760px;color:#d7e8df;font-size:18px;line-height:1.7}.cqa-lab-level-nav{display:flex;flex-wrap:wrap;gap:9px;margin-top:24px}.cqa-lab-level-nav a{padding:9px 13px;border:1px solid rgba(255,255,255,.28);border-radius:999px;color:#fff;text-decoration:none}.cqa-lab-level-nav a:hover,.cqa-lab-level-nav a.is-current{background:#fff;color:var(--cqa-deep)}
.cqa-lab-hub-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:14px;margin-top:24px}.cqa-lab-level-card{display:flex;min-height:190px;flex-direction:column;padding:22px;border:1px solid var(--cqa-line);border-radius:20px;background:var(--cqa-card);color:var(--cqa-ink);text-decoration:none;transition:.2s transform,.2s box-shadow}.cqa-lab-level-card:hover{transform:translateY(-4px);box-shadow:0 16px 36px rgba(42,61,49,.13)}.cqa-lab-level-card>span{font-size:28px;font-weight:800;color:var(--cqa-green)}.cqa-lab-level-card>strong{margin:12px 0;color:var(--cqa-ink)}.cqa-lab-level-card>small{margin-top:auto;color:var(--cqa-muted)}
.cqa-lab-stats{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}.cqa-lab-stats span{min-width:120px;padding:11px 14px;border:1px solid rgba(255,255,255,.2);border-radius:13px;background:rgba(255,255,255,.11)}.cqa-lab-stats b{display:block;font-size:23px}.cqa-lab-tools{position:sticky;top:8px;z-index:4;display:flex;flex-wrap:wrap;gap:8px;margin:22px 0;padding:10px;border:1px solid var(--cqa-line);border-radius:18px;background:rgba(255,253,248,.94);backdrop-filter:blur(12px)}.cqa-lab-tools input{flex:1;min-width:210px;padding:10px 15px;border:1px solid var(--cqa-line);border-radius:999px;background:#fff}.cqa-lab-tools button{padding:10px 14px;border:0;border-radius:999px;background:#eee9df;color:var(--cqa-ink);font-weight:750;cursor:pointer}.cqa-lab-tools button.is-active{background:var(--cqa-green);color:#fff}.cqa-lab-word-grid{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:12px}.cqa-lab-word-card{display:flex;min-height:150px;flex-direction:column;padding:17px;border:1px solid var(--cqa-line);border-radius:18px;background:var(--cqa-card);color:var(--cqa-ink);text-decoration:none;transition:.2s transform,.2s box-shadow}.cqa-lab-word-card:hover{transform:translateY(-3px);box-shadow:0 12px 30px rgba(44,63,51,.12)}.cqa-lab-word-card>strong{font-size:31px}.cqa-lab-word-card>span{color:var(--cqa-green);font-size:16px}.cqa-lab-word-card>small{align-self:flex-start;margin-top:auto;padding:5px 8px;border-radius:999px;background:var(--cqa-mint);color:var(--cqa-green)}.cqa-lab-word-card[hidden]{display:none}.cqa-lab-pagination{display:flex;flex-wrap:wrap;justify-content:center;gap:7px;margin-top:26px}.cqa-lab-pagination a{display:grid;width:38px;height:38px;place-items:center;border:1px solid var(--cqa-line);border-radius:10px;background:var(--cqa-card);color:var(--cqa-ink);text-decoration:none}.cqa-lab-pagination a.is-current{background:var(--cqa-green);color:#fff}
.cqa-lab-back{display:inline-block;margin-bottom:16px;color:var(--cqa-green);font-weight:750;text-decoration:none}.cqa-lab-lesson-card{display:grid;grid-template-columns:1.03fr .97fr;overflow:hidden;padding:0;border:1px solid rgba(80,70,45,.14);border-radius:30px;background:var(--cqa-card);box-shadow:0 28px 80px rgba(48,61,48,.16)}.cqa-lab-stage{display:flex;min-height:620px;flex-direction:column;padding:38px;background:linear-gradient(165deg,#1c493a,#17372e);color:white}.cqa-lab-stage h1{margin:8px 0 0;color:#fff;font-family:"KaiTi","Microsoft YaHei",sans-serif;font-size:clamp(68px,10vw,120px);line-height:1}.cqa-lab-pinyin{color:#f2c76e;font-size:26px}.cqa-lab-motion{display:grid;flex:1;grid-template-columns:repeat(auto-fit,minmax(120px,1fr));align-items:center;gap:14px}.cqa-lab-motion-character{text-align:center}.cqa-lab-motion-character>b{display:block;margin-bottom:15px;color:rgba(255,255,255,.28);font-size:36px}.cqa-lab-motion-character>div{display:flex;justify-content:center;gap:0}.cqa-lab-motion-character span{display:inline-block;color:#8bd2ae;font-family:"KaiTi","Microsoft YaHei",sans-serif;font-size:86px;transition:transform .85s cubic-bezier(.2,.8,.2,1)}.cqa-lab-motion-character span:nth-child(even){color:#f2c76e}.cqa-lab-lesson-card.is-split .cqa-lab-motion-character span:nth-child(odd){transform:translateX(-24px)}.cqa-lab-lesson-card.is-split .cqa-lab-motion-character span:nth-child(even){transform:translateX(24px)}.cqa-lab-controls{display:flex;flex-wrap:wrap;gap:9px}.cqa-lab-controls button{padding:11px 16px;border:0;border-radius:999px;background:#f5d89b;color:#3b2b12;font-weight:750;cursor:pointer}.cqa-lab-explanation{padding:42px}.cqa-lab-category{display:inline-block;padding:7px 11px;border-radius:999px;background:var(--cqa-mint);color:var(--cqa-green);font-weight:750}.cqa-lab-explanation h2{margin:26px 0 8px;color:var(--cqa-deep);font-size:22px}.cqa-lab-explanation p{color:var(--cqa-muted);font-size:17px;line-height:1.7}.cqa-lab-component-list{display:grid;gap:10px}.cqa-lab-component-list>div{padding:14px;border:1px solid var(--cqa-line);border-radius:15px;background:#faf7f0}.cqa-lab-component-list strong{display:block;color:var(--cqa-deep);font-size:22px}.cqa-lab-component-list span{color:var(--cqa-muted)}.cqa-lab-example-cn{color:var(--cqa-ink)!important;font-size:24px!important}.cqa-lab-disclaimer{margin-top:24px;padding:14px;border-left:4px solid var(--cqa-gold);border-radius:4px 14px 14px 4px;background:#fff5e5;font-size:13px!important}.cqa-lab-prev-next{display:flex;justify-content:space-between;margin-top:18px}.cqa-lab-prev-next a{padding:11px 16px;border:1px solid var(--cqa-line);border-radius:999px;background:var(--cqa-card);color:var(--cqa-green);font-weight:750;text-decoration:none}
@media(max-width:980px){.cqa-lab-hub-grid,.cqa-lab-word-grid{grid-template-columns:repeat(3,1fr)}.cqa-lab-lesson-card{grid-template-columns:1fr}.cqa-lab-stage{min-height:480px}.cqa-lab-motion-character span{font-size:72px}}@media(max-width:650px){.cqa-lab{padding-top:18px}.cqa-lab-hero{padding:30px 23px;border-radius:22px}.cqa-lab-hub-grid,.cqa-lab-word-grid{grid-template-columns:repeat(2,1fr)}.cqa-lab-level-card{min-height:150px}.cqa-lab-stage,.cqa-lab-explanation{padding:28px 23px}.cqa-lab-motion{grid-template-columns:1fr}.cqa-lab-motion-character span{font-size:66px}}@media(max-width:420px){.cqa-lab-word-grid{grid-template-columns:1fr}}@media(prefers-reduced-motion:reduce){.cqa-lab-motion-character span,.cqa-lab-word-card,.cqa-lab-level-card{transition:none}}
.cqa-lab-part-details{display:grid;gap:7px;margin:12px 0 0;padding:0;list-style:none}.cqa-lab-part-details li{display:grid;grid-template-columns:40px minmax(72px,auto) 1fr;align-items:center;gap:9px;padding:8px 10px;border-radius:11px;background:#fff}.cqa-lab-part-details b{color:var(--cqa-deep);font-family:"KaiTi","Microsoft YaHei",sans-serif;font-size:26px}.cqa-lab-part-details em{color:var(--cqa-green);font-style:normal;font-weight:750}.cqa-lab-part-details span{font-size:14px}.cqa-lab-etymology{margin-top:24px;padding:18px;border:1px solid #ead4ae;border-radius:17px;background:#fff8eb}.cqa-lab-etymology h2{margin-top:0}.cqa-lab-etymology p{margin-bottom:0;font-size:15px}@media(max-width:650px){.cqa-lab-part-details li{grid-template-columns:34px 70px 1fr}}
.cqa-lab-confidence{display:inline-block;padding:5px 9px;border-radius:999px;background:#e3efe7;color:var(--cqa-green)!important;font-size:12px;font-weight:800}.cqa-lab-etymology p+p{margin-top:11px}.cqa-lab-student-note{padding:11px 13px;border-left:3px solid var(--cqa-gold);border-radius:0 10px 10px 0;background:#fff}.cqa-lab-etymology details{margin-top:14px}.cqa-lab-etymology summary{cursor:pointer;color:var(--cqa-deep);font-weight:750}.cqa-lab-etymology ul{margin:9px 0 0;padding-left:19px}.cqa-lab-etymology a{color:var(--cqa-green)}.cqa-lab-etymology.is-pending{border-style:dashed;background:#faf8f2}
.cqa-lab-lesson-card{align-items:start}.cqa-lab-stage{height:560px;min-height:0;align-self:start}.cqa-lab-motion{min-height:250px}.cqa-lab-motion-character span{font-size:72px}@media(max-width:980px){.cqa-lab-stage{width:100%;height:500px;min-height:0}.cqa-lab-motion{min-height:210px}}@media(max-width:650px){.cqa-lab-stage{height:460px}.cqa-lab-motion{min-height:190px}.cqa-lab-motion-character span{font-size:60px}}