:root{--ink:#171e29;--muted:#676c73;--paper:#f7f6f2;--orange:#f65b28;--line:#dedfdc;--serif:"Songti SC","Noto Serif CJK SC",SimSun,serif}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:32px}body{margin:0;background:var(--paper);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{font:inherit}a:focus-visible,button:focus-visible,summary:focus-visible{outline:3px solid var(--orange);outline-offset:5px}.wrap{max-width:1200px;margin:auto;padding:0 48px}.skip{position:absolute;left:16px;top:-100px;background:white;padding:14px;z-index:10}.skip:focus{top:10px}.header{display:flex;align-items:center;justify-content:space-between;height:112px}.brand{display:flex;align-items:center;gap:12px}.brand img{border-radius:9px}.brand span{font-size:20px;font-weight:650;letter-spacing:1px}.brand small{display:block;font-size:9px;letter-spacing:1.8px;font-weight:400;margin-top:5px}.header nav{display:flex;align-items:center;gap:34px;font-size:13px}.nav-download{border-bottom:1px solid var(--ink);padding-bottom:9px}.nav-download span{margin-left:16px}.hero{display:grid;grid-template-columns:1.05fr 1fr;gap:40px;align-items:center;padding-top:48px;padding-bottom:88px;min-height:740px}.eyebrow{font-size:12px;letter-spacing:1.8px;font-weight:600;margin:0 0 30px}.eyebrow span{display:inline-block;width:7px;height:7px;background:var(--orange);border-radius:50%;margin-right:8px;vertical-align:1px}h1{font-family:var(--serif);font-size:60px;line-height:1.34;font-weight:500;letter-spacing:-1px;margin:0 0 30px}.intro{font-size:16px;line-height:1.95;color:var(--muted);margin-bottom:35px}.hero-actions{display:flex;align-items:center;gap:26px}.button{display:inline-flex;align-items:center;justify-content:space-between;gap:40px;padding:18px 24px;font-size:14px;font-weight:600;border-radius:4px;transition:transform .2s,background .2s}.button:hover{transform:translateY(-2px)}.dark{background:var(--ink);color:white}.text-link{font-size:13px;display:inline-flex;gap:20px;align-items:center}.text-link:hover{text-decoration:underline}.hero-meta{display:flex;align-items:center;gap:12px;color:var(--muted);font-size:11px;margin-top:28px}.hero-meta i{width:3px;height:3px;border-radius:50%;background:#9a9d9b}.study-scene{position:relative;padding:45px 35px 32px;border-radius:160px 160px 16px 16px;background:#eceee7;min-height:575px;display:flex;justify-content:center}.scene-label{position:absolute;top:-25px;left:22px;font-family:var(--serif);font-size:15px}.scene-label span{display:block;font-family:inherit;font-size:10px;color:var(--muted);margin-top:6px}.phone{background:#fff;border:7px solid var(--ink);border-radius:32px;width:290px;box-shadow:16px 22px 32px #171e2914;position:relative;overflow:hidden;transform:rotate(-3deg)}.phone-bar{font-size:10px;background:var(--ink);color:white;padding:8px 15px 16px;display:flex;justify-content:space-between}.phone-content{padding:20px 17px}.micro{font-size:9px;color:var(--muted);margin:0 0 7px}.phone h2{font-size:19px;letter-spacing:0;margin:0 0 15px;font-family:var(--serif)}.file-tag{font-size:9px;display:flex;justify-content:space-between;color:var(--muted);padding-bottom:18px;border-bottom:1px solid var(--line)}.file-tag span{color:#436049}.demo-tabs{display:flex;gap:23px;margin:20px 0}.demo-tabs button{cursor:pointer;border:0;background:none;color:var(--muted);font-size:11px;padding:0 0 7px;border-bottom:2px solid transparent}.demo-tabs button[aria-selected=true]{color:var(--ink);border-color:var(--orange);font-weight:600}.demo-panel{min-height:232px}.chapter{font-size:9px;color:var(--orange);letter-spacing:1px}.phone h3{font-size:16px;margin:12px 0;font-family:var(--serif)}.demo-panel>p:not(.chapter){font-size:11px;line-height:1.9;color:var(--muted)}.formula{font-family:Georgia,serif;font-size:13px;margin:18px 0;padding:14px 8px;background:#f7f6f2;text-align:center}.formula span{font-size:11px}.note{border-left:2px solid var(--orange);padding:0 0 0 10px;font-size:10px}.note b{font-weight:600}.note p{line-height:1.7;color:var(--muted);margin:5px 0}.demo-disclaimer{font-size:8px;color:#858880;margin-top:20px}.phone-bottom{padding:12px;display:flex;justify-content:space-around;border-top:1px solid var(--line);font-size:9px;color:#62696e}.margin-note{position:absolute;right:-7px;bottom:26px;padding:16px 20px;background:#fff;box-shadow:0 8px 22px #171e290d;transform:rotate(3deg)}.margin-note span{font-size:8px;letter-spacing:1.5px;color:var(--muted)}.margin-note p{font-size:12px;font-family:var(--serif);margin:10px 0}.progress-line{height:3px;background:linear-gradient(to right,var(--orange) 66%,#e8e9e4 66%)}.section-divider{display:flex;justify-content:space-between;padding-top:20px;font-size:10px;letter-spacing:2px}.section-divider:before{content:none}.section-divider{border-top:1px solid var(--line)}h2{font-family:var(--serif);font-size:38px;line-height:1.45;font-weight:500;margin:0;letter-spacing:-.5px}.experience{padding-top:82px;padding-bottom:95px;display:grid;grid-template-columns:.85fr 1.15fr;gap:80px}.section-heading .eyebrow{margin-bottom:20px}.steps article{display:flex;gap:24px;padding:28px 0;border-top:1px solid var(--line)}.steps article:first-child{padding-top:0;border:0}.step-number{font-family:Georgia,serif;font-style:italic;font-size:30px;color:#a1a79d;min-width:44px}.steps h3{font-size:19px;font-weight:500;margin:3px 0 12px}.steps p{font-size:13px;line-height:1.95;color:var(--muted);margin:0;max-width:390px}.step-tag{font-size:10px;color:#777f72;display:block;margin-top:18px}.download-section{background:var(--ink);color:#fff;padding:78px 0}.download-layout{display:flex;justify-content:space-between;align-items:center;gap:50px}.light{color:#c6c8c3}.download-section h2{font-size:46px}.download-intro{font-size:14px;line-height:1.9;color:#c5c8cd;margin:24px 0}.release-meta{display:flex;gap:15px;flex-wrap:wrap;font-size:11px;color:#bfc4cd;margin:25px 0 18px}.orange{background:var(--orange);color:white;min-width:230px}.button[aria-disabled=true]{opacity:.6;cursor:wait}.download-tip{font-size:11px;color:#bbc0c9;line-height:1.9;margin:13px 0 0;max-width:450px}.qr-card{background:white;color:var(--ink);padding:24px 25px 21px;transform:rotate(2deg);text-align:center;border-radius:6px;margin-right:50px}.qr-card img{display:block}.qr-card p{font-size:13px;margin:18px 0 9px}.qr-card small{font-size:10px;color:var(--muted)}.updates{display:grid;grid-template-columns:1fr 1fr;gap:100px;padding-top:100px;padding-bottom:80px}.section-description{font-size:13px;line-height:1.95;color:var(--muted);max-width:420px;margin-top:25px}.release-card{border:1px solid var(--line);padding:32px;background:#fff;align-self:center;border-radius:4px}.release-card-top{display:flex;justify-content:space-between;align-items:center;padding-bottom:22px;border-bottom:1px solid var(--line)}.release-card-top span{font-size:11px;color:var(--muted)}.release-card-top strong{font-size:20px;font-weight:500;font-family:Georgia,serif}.release-card>p{white-space:pre-line;font-size:13px;color:var(--muted);line-height:2;margin:24px 0}.faq{padding-top:35px;padding-bottom:90px;border-top:1px solid var(--line);display:grid;grid-template-columns:1fr 1.1fr;gap:60px}.faq h2{font-size:29px}.faq-list details{border-bottom:1px solid var(--line);padding:20px 0}.faq-list summary{list-style:none;cursor:pointer;display:flex;justify-content:space-between;font-size:14px;font-weight:500;gap:20px}.faq-list summary::-webkit-details-marker{display:none}.faq-list summary:after{content:'+';color:var(--orange);font-size:20px;font-weight:400}.faq-list details[open] summary:after{content:'−'}.faq-list p{font-size:12px;color:var(--muted);line-height:1.95;padding-right:25px;margin:16px 0 0}.footer{border-top:1px solid var(--line);padding-top:32px;padding-bottom:27px}.footer-top{display:flex;justify-content:space-between;align-items:center}.footer .brand span{font-size:17px}.footer .brand small{font-size:10px;letter-spacing:0}.footer-top>div{display:flex;gap:24px;font-size:11px;color:var(--muted)}.footer-bottom{margin-top:32px;display:flex;justify-content:space-between;font-size:10px;color:var(--muted);gap:20px}.legal{max-width:850px;margin:35px auto 90px;padding:0 24px}.legal h1{font-size:38px}.legal h2{font-size:22px;margin:35px 0 15px}.legal p{line-height:1.95;font-size:14px;color:#4e555e}.legal .legal-meta{font-size:12px;color:var(--muted);margin-bottom:40px}@media(max-width:950px){.wrap{padding-left:32px;padding-right:32px}.hero{gap:25px}h1{font-size:47px}.study-scene{padding-left:18px;padding-right:18px}.hero-actions{gap:16px;flex-wrap:wrap}.experience{gap:45px}.updates{gap:45px}.qr-card{margin-right:0}.faq{gap:40px}.margin-note{right:5px}}@media(max-width:700px){.wrap{padding-left:24px;padding-right:24px}.header{height:88px}.brand span{font-size:18px}.header nav{gap:18px}.header nav>a:not(.nav-download){display:none}.hero{grid-template-columns:1fr;padding-top:26px;padding-bottom:55px;gap:66px}.eyebrow{font-size:10px;margin-bottom:23px}h1{font-size:44px}.intro{font-size:14px}.hero-actions{gap:25px}.button{padding:17px 22px;font-size:13px}.hero-meta{font-size:10px}.study-scene{max-width:420px;width:100%;margin:auto;min-height:555px;padding-top:39px}.scene-label{left:10px}.phone{width:278px}.experience{grid-template-columns:1fr;padding-top:50px;padding-bottom:55px;gap:38px}h2{font-size:31px}.steps article{gap:18px}.download-section{padding:50px 0}.download-layout{align-items:flex-start;flex-direction:column;gap:35px}.download-section h2{font-size:36px}.qr-card{transform:none;display:grid;grid-template-columns:95px 1fr;column-gap:20px;padding:16px;text-align:left;align-items:center}.qr-card img{width:95px;height:95px;grid-row:1/3}.qr-card p{margin:0;font-size:13px}.qr-card small{align-self:start}.updates{grid-template-columns:1fr;padding-top:58px;padding-bottom:40px;gap:22px}.updates .eyebrow{margin-bottom:18px}.release-card{padding:25px}.faq{grid-template-columns:1fr;padding-top:35px;padding-bottom:50px;gap:20px}.faq h2{font-size:28px}.footer-top{align-items:flex-start;gap:24px;flex-direction:column}.footer-bottom{flex-direction:column;gap:12px;margin-top:25px}.footer-top>div{gap:24px}.legal h1{font-size:32px}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.button{transition:none}}
