:root{--blue:#1165f5;--ink:#112b50;--muted:#65758b;--line:#e5ebf2;--paper:#f6f9ff}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:28px}body{margin:0;background:#fff;color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}button,input{font:inherit}button,a,input,summary{-webkit-tap-highlight-color:transparent}a:focus-visible,button:focus-visible,input:focus-visible,summary:focus-visible{outline:3px solid #ffca46;outline-offset:5px}.wrap{max-width:1160px;margin-inline:auto;padding-inline:36px}.skip{position:absolute;left:16px;top:-100px;z-index:10;background:var(--ink);color:white;padding:14px}.skip:focus{top:16px}.header{height:108px;display:flex;align-items:center;justify-content:space-between}.brand{display:flex;gap:12px;align-items:center;font-weight:750;font-size:21px;letter-spacing:.5px}.brand img{border-radius:13px}.brand small{display:block;font-size:11px;font-weight:500;color:var(--muted);margin-top:4px;letter-spacing:1px}nav{display:flex;gap:30px;align-items:center;font-size:14px}nav>a:first-child{color:var(--muted)}.nav-cta{border:1px solid var(--line);padding:12px 18px;border-radius:10px}.nav-cta span{margin-left:12px}.hero{min-height:580px;display:grid;grid-template-columns:1.05fr 1fr;align-items:center;gap:25px;padding-top:40px;padding-bottom:80px}.eyebrow,.section-kicker{color:var(--blue);font-size:13px;font-weight:650;letter-spacing:1px}.eyebrow{display:flex;gap:9px;align-items:center}.eyebrow span{width:8px;height:8px;border-radius:50%;background:#2cb58c}h1{font-size:62px;line-height:1.22;letter-spacing:-3px;margin:23px 0 22px;font-weight:800}.blue{color:var(--blue);position:relative}.blue:after{content:"";position:absolute;bottom:-6px;left:0;right:0;height:5px;border-radius:50%;background:#ffc93e;transform:rotate(-3deg)}.lead{font-size:18px;line-height:1.85;color:var(--muted);margin:0}.vocab{display:flex;gap:9px;margin:24px 0}.vocab span{border:1px solid #dce6f4;color:#506780;border-radius:7px;font-size:12px;padding:7px 12px;background:#f9fbff}.button{border:0;border-radius:11px;display:inline-flex;align-items:center;justify-content:center;gap:28px;padding:17px 24px;font-size:15px;font-weight:650;cursor:pointer;transition:background .15s,transform .15s}.primary{background:var(--blue);color:#fff;box-shadow:0 6px 0 #084ecb}.primary:hover{background:#0858de;transform:translateY(-1px)}.primary:active{transform:translateY(3px);box-shadow:0 3px 0 #084ecb}.micro{font-size:11px;color:var(--muted);margin-top:21px}.hero-art{position:relative;height:470px;display:flex;align-items:center;justify-content:center}.art-orbit{position:absolute;width:370px;height:370px;border-radius:50%;background:#eff7ff;border:1px solid #e0edff;z-index:0}.art-orbit:before,.art-orbit:after{content:"";position:absolute;border:1px dashed #c2d7f6;border-radius:50%;inset:-30px;transform:rotate(-15deg)}.art-orbit:after{inset:28px;background:#e2f2ff;border:0}.mascot{position:relative;width:355px;height:auto;z-index:2;filter:drop-shadow(0 18px 14px #3d74b31a);transform:rotate(-6deg)}.art-label{position:absolute;top:18px;right:28px;letter-spacing:2px;font-size:9px;color:#7192ba;transform:rotate(5deg)}.word-float{position:absolute;z-index:3;background:white;border:1px solid #e6edf5;box-shadow:0 12px 28px #2449700d;padding:14px 21px;border-radius:13px}.float-one{top:67px;left:10px;font-size:19px;font-weight:700;transform:rotate(-8deg)}.float-one small{display:block;font-size:10px;font-weight:500;color:var(--muted);margin-top:5px}.float-two{bottom:71px;right:0;font-size:12px;transform:rotate(5deg)}.float-two span{color:#edb427;font-size:21px;margin-right:8px}.art-ground{position:absolute;bottom:49px;width:255px;height:20px;background:#c1dff44d;border-radius:50%}.art-caption{position:absolute;bottom:9px;font-size:11px;color:#7b91ab;letter-spacing:1px}.demo-section{background:var(--paper);padding:72px 0;border-top:1px solid #eef2f8;border-bottom:1px solid #eef2f8}.demo-grid{display:grid;grid-template-columns:1fr 1.1fr;gap:80px;align-items:center}h2{font-size:34px;line-height:1.4;letter-spacing:-1px;margin:12px 0 18px}.section-copy{font-size:15px;color:var(--muted);line-height:1.9}.demo-note{font-size:11px;color:#7f8fa3;margin-top:26px}.word-demo{background:white;border-radius:20px;border:1px solid #dbe6f5;padding:29px;box-shadow:0 12px 32px #1c48750a}.demo-head{display:flex;justify-content:space-between;align-items:center;font-size:12px;font-weight:650;color:#687f99}.demo-tag{background:#edf4ff;color:var(--blue);padding:5px 8px;font-size:9px;letter-spacing:1px;border-radius:4px}.word-meaning{font-size:27px;font-weight:700;margin:24px 0 6px}.pronunciation{font-size:13px;color:var(--muted);margin:0 0 24px}.word-demo label{display:block;font-size:12px;color:var(--muted);margin-bottom:10px}.answer-row{display:flex;gap:12px}.answer-row input{min-width:0;width:100%;border:1px solid #d7e2ef;border-radius:10px;background:#f8fbff;padding:14px 15px;color:var(--ink);font-size:14px}.answer-row button{padding:13px 18px;white-space:nowrap;box-shadow:0 3px 0 #084ecb}.feedback{font-size:11px;color:var(--muted);min-height:34px;line-height:1.7;margin:17px 0 8px}.feedback.success{color:#157e59}.demo-bottom{display:flex;justify-content:space-between;border-top:1px solid var(--line);padding-top:14px;color:#7990ab;font-size:10px}.demo-bottom span:last-child{color:#efb737}.how{padding-top:78px;padding-bottom:80px}.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:34px;margin-top:42px}.steps article{border-top:2px solid #dce7f6;padding-top:24px}.step-number{color:var(--blue);font-size:12px;letter-spacing:2px;font-weight:700}.steps h3{font-size:20px;margin:17px 0 12px}.steps p{font-size:14px;line-height:1.85;color:var(--muted);margin-bottom:24px}.step-detail{font-size:11px;color:#8a98ab}.start{padding:55px 58px;background:var(--ink);border-radius:26px;color:white;display:grid;grid-template-columns:1fr 270px;gap:50px;align-items:center}.start .section-kicker{color:#9ac7ff}.start h2{font-size:37px}.start-copy>p:not(.section-kicker){line-height:1.9;color:#b6c7df;font-size:14px}.light{background:#fff;color:var(--ink);margin-top:13px}.light:hover{background:#e9f2ff}.start-copy .copy-status{font-size:11px!important;min-height:18px;margin:12px 0 0}.start-copy .access-note{font-size:11px!important;max-width:370px;margin-top:18px}.qr-card{background:white;padding:23px;border-radius:17px;color:var(--ink);text-align:center}.qr-title{font-size:12px;font-weight:650;display:flex;gap:7px;align-items:center;justify-content:center}.green-dot{width:7px;height:7px;background:#25b26e;border-radius:50%}.qr-card img{display:block;width:100%;height:auto;margin:14px auto 0}.qr-card p{font-size:17px;font-weight:700;margin:6px 0}.qr-card>span{font-size:10px;color:var(--muted)}.qr-card>a{display:block;color:var(--blue);font-size:11px;margin-top:15px}.faq{padding-top:75px;padding-bottom:70px}.faq h2{font-size:24px;margin-bottom:24px}.faq details{border-bottom:1px solid var(--line);padding:19px 0}.faq summary{font-size:14px;cursor:pointer;line-height:1.6}.faq details p{font-size:13px;line-height:1.9;max-width:780px;color:var(--muted);margin-bottom:0}.footer{border-top:1px solid var(--line);padding-top:31px;padding-bottom:28px;color:var(--muted);font-size:11px;line-height:1.9}.footer-brand{color:var(--ink);font-size:15px;font-weight:700;margin-bottom:16px}.footer-brand span{font-size:11px;color:#91a0b4;font-weight:400;margin-left:18px}.footer p{margin:8px 0}.footer-links{display:flex;flex-wrap:wrap;gap:8px 18px}.footer-links a:hover{text-decoration:underline}.disclaimer{font-size:10px;color:#91a0b4}.privacy{max-width:780px;padding-top:40px;padding-bottom:64px;line-height:1.9}.privacy h1{font-size:36px;letter-spacing:0}.privacy h2{font-size:20px;margin-top:32px;letter-spacing:0}.privacy p{font-size:14px;color:var(--muted)}.privacy a{color:var(--blue);text-decoration:underline}@media(min-width:1250px){.start{max-width:1088px}.hero{gap:52px}}@media(max-width:800px){.wrap{padding-inline:24px}.header{height:90px}.brand{font-size:18px}.brand img{width:36px;height:36px}.brand small{font-size:9px}nav{gap:12px}nav>a:first-child{display:none}.nav-cta{padding:10px 12px;font-size:12px}.hero{grid-template-columns:1fr;gap:2px;padding-top:30px;padding-bottom:32px}.hero-copy{text-align:center}.eyebrow{justify-content:center;font-size:11px}h1{font-size:49px;letter-spacing:-2px}.lead{font-size:16px}.vocab{justify-content:center}.hero-art{height:390px;max-width:430px;width:100%;margin:16px auto 0}.art-orbit{width:275px;height:275px}.mascot{width:300px}.float-one{left:0;top:54px;font-size:16px}.float-two{right:0;bottom:66px;font-size:10px}.art-label{right:25px;top:23px;font-size:8px}.demo-section{padding:44px 0}.demo-grid{grid-template-columns:1fr;gap:24px}h2{font-size:28px}.section-copy br{display:none}.demo-note{margin-top:16px}.word-demo{padding:23px}.how{padding-top:48px;padding-bottom:46px}.steps{gap:24px;margin-top:28px;grid-template-columns:1fr}.steps article{display:grid;grid-template-columns:34px 1fr;gap:0 15px;padding-top:20px}.step-number{grid-row:1/4;padding-top:5px}.steps h3{font-size:18px;margin:0 0 8px}.steps p{margin:0 0 12px}.steps p br{display:none}.step-detail{grid-column:2}.start{margin-inline:16px;padding:32px 26px;grid-template-columns:1fr;gap:18px;border-radius:20px;text-align:center}.start h2{font-size:32px}.start-copy .access-note{margin-inline:auto}.qr-card{width:260px;max-width:100%;justify-self:center}.faq{padding-top:46px;padding-bottom:43px}.faq h2{font-size:22px}.footer-links{gap:7px 16px}.privacy h1{font-size:29px}}@media(max-width:370px){.wrap{padding-inline:18px}.brand{font-size:16px}h1{font-size:43px}.hero-art{height:350px}.mascot{width:264px}.float-one{padding:11px 14px}.art-orbit{width:245px;height:245px}.float-two{padding:10px 14px}.vocab span{padding:6px 9px}.start{padding-inline:20px}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.button{transition:none}}
@media(max-width:800px){h1{font-size:42px;letter-spacing:-2px}.hero-art{overflow:clip}}@media(max-width:370px){h1{font-size:39px}}
