:root{--red:#d71920;--ink:#232326;--muted:#737378;--line:#e7e5e1;--paper:#f7f6f3}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:100px}body{margin:0;color:var(--ink);background:#fff;font-family:Inter,"Microsoft YaHei","PingFang SC",sans-serif;font-size:16px;-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}button{font:inherit;cursor:pointer}a,button,summary{outline-offset:5px}button:focus-visible,a:focus-visible,summary:focus-visible{outline:3px solid var(--red)}header{height:90px;padding:0 5.5%;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line);background:#ffffffef;position:sticky;top:0;z-index:10;backdrop-filter:blur(12px)}.brand{display:inline-flex;align-items:center;gap:12px;font-weight:750;font-size:25px}.brand-icon{display:grid;place-items:center;width:36px;height:36px;border-radius:9px;background:var(--red);color:white;font-size:22px}.beta{font-size:11px;padding:4px 7px;background:var(--paper);color:var(--muted);font-weight:400;border:1px solid var(--line)}nav{display:flex;align-items:center;gap:35px;font-size:14px}.nav-download{border:1px solid var(--line);padding:12px 18px;border-radius:4px}.nav-download span{margin-left:20px}main{max-width:1600px;margin:auto}.hero{padding:90px 7% 0}.eyebrow{text-transform:uppercase;font-size:12px;letter-spacing:.14em;font-weight:600;margin:0 0 24px;display:flex;align-items:center;gap:10px}.eyebrow>span{width:7px;height:7px;background:var(--red);border-radius:50%}h1{font-size:clamp(58px,6.1vw,94px);font-weight:650;line-height:1.18;letter-spacing:-.055em;margin:28px 0 35px}.red{color:var(--red)}.hero-bottom{display:flex;align-items:center;justify-content:space-between;max-width:980px}.hero-bottom p{font-size:18px;line-height:1.9;color:var(--muted)}.watch{display:flex;align-items:center;gap:24px;font-weight:600}.play-small{display:grid;place-items:center;width:48px;height:48px;border:1px solid var(--line);border-radius:50%;font-size:13px;color:var(--red);transition:.2s}.watch:hover .play-small{background:var(--red);color:white}.hero-index{border-top:1px solid var(--line);margin-top:60px;padding:22px 0;display:flex;justify-content:space-between;font-size:12px;color:var(--muted)}.demo-section{background:var(--paper);padding:55px 7% 45px;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.section-head{display:flex;align-items:end;justify-content:space-between;margin-bottom:28px;gap:15px}.section-head .eyebrow{color:var(--red);margin-bottom:14px}h2{font-size:clamp(27px,3vw,43px);line-height:1.4;letter-spacing:-.035em;font-weight:600;margin:0}.section-head h2{font-size:clamp(24px,2.4vw,35px)}.duration{font-size:12px;white-space:nowrap;color:var(--muted);padding-bottom:8px}.video-shell{background:white;border:1px solid #ddd9d3;box-shadow:0 20px 65px #29221a0b;border-radius:9px;overflow:hidden}video{display:block;width:100%;aspect-ratio:16/9;background:var(--paper)}.video-meta{display:flex;gap:22px;font-size:11px;color:var(--muted);padding:18px 0 24px;flex-wrap:wrap}.video-meta span{margin-right:auto}.video-meta a{color:var(--ink);text-decoration:underline;text-underline-offset:4px}.chapters{display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid #dbd8d1;border-bottom:1px solid #dbd8d1}.chapters button{border:0;border-right:1px solid #dbd8d1;background:none;display:flex;align-items:center;gap:12px;text-align:left;padding:22px 18px;font-size:14px}.chapters button:last-child{border-right:0}.chapters span{font-size:11px;color:var(--red)}.chapters small{margin-left:auto;font-size:10px;color:var(--muted)}.chapters button:hover,.chapters button.active{background:#fff;color:var(--red)}#play-status:empty{display:none}.workflow{display:grid;grid-template-columns:1fr 1.45fr;gap:10%;padding:100px 7%}.workflow aside{position:sticky;top:125px;align-self:start}.workflow aside p:last-child{font-size:14px;color:var(--muted);line-height:1.9;margin-top:25px}.steps article{display:grid;grid-template-columns:40px 1fr;gap:18px;padding:32px 0 40px;border-top:1px solid var(--line)}.steps article>span{font-size:12px;color:var(--red);padding-top:7px}h3{font-size:21px;font-weight:600;margin:0 0 14px}.steps p{color:var(--muted);font-size:14px;line-height:1.9;margin:0 0 20px}.file{display:flex;gap:15px;align-items:center;padding:20px;background:var(--paper);border:1px solid var(--line);font-size:14px}.file-icon{background:white;color:var(--red);border:1px solid var(--line);padding:8px}.file small{display:block;font-size:11px;color:var(--muted);margin-top:7px}.file b{margin-left:auto;color:var(--red)}blockquote{border-left:2px solid var(--red);padding:14px 20px;margin:22px 0 0;background:var(--paper);font-size:14px;line-height:1.9}table{border-collapse:collapse;width:100%;text-align:left;font-size:13px}caption{text-align:left;font-size:11px;margin-bottom:10px;color:var(--muted)}th,td{padding:13px 16px;border-bottom:1px solid var(--line)}th{background:#fff0f1;color:#a21b20;font-weight:500}.steps .source{font-size:11px;margin-top:12px}.download{background:#252528;color:white;padding:75px 7%;display:grid;grid-template-columns:1.1fr 1fr;gap:12%}.download .eyebrow{color:#ff999b}.download h2{font-size:44px}.download p{color:#b9b9c0;font-size:14px;line-height:1.9;margin:24px 0}.primary{background:var(--red);color:white;border:0;border-radius:4px;padding:17px 25px;font-size:14px;font-weight:600}.primary:hover{background:#b91018}.primary:disabled{background:#65656d;cursor:default}.download .download-status{font-size:11px;max-width:430px}.release{align-self:center;border-top:1px solid #55555c}.release-top{display:flex;justify-content:space-between;align-items:center;padding:28px 0}.release-top strong{font-size:24px}.release-top span{font-size:13px;color:#d5d5db}dl{margin:0}dl>div{display:flex;justify-content:space-between;padding:13px 0;border-top:1px solid #424248;font-size:13px}dt{color:#aaaab1}dd{margin:0}.release p{font-size:12px;margin:18px 0}.release summary{font-size:12px}.release code{display:block;word-break:break-all;font-size:11px;line-height:1.7;color:#bdbdc4;padding:14px 0}.release button{border:1px solid #66666c;background:none;color:#eee;padding:6px 10px;font-size:11px}.release #copy-status{font-size:11px;margin-left:10px}.faq{padding:90px 7%;display:grid;grid-template-columns:1fr 1.45fr;gap:10%}.faq details{border-bottom:1px solid var(--line);padding:24px 0}.faq details:first-child{padding-top:6px}summary{cursor:pointer;line-height:1.8}.faq p{color:var(--muted);line-height:1.9;font-size:14px;margin-bottom:0}footer{margin:0 5.5%;padding:35px 0;border-top:1px solid var(--line);display:flex;align-items:center;gap:35px}footer p,footer>a:last-child{font-size:12px;color:var(--muted)}footer>a:last-child{margin-left:auto}footer .brand{font-size:18px}footer .brand-icon{width:28px;height:28px;font-size:17px}@media(max-width:760px){header{height:72px;padding:0 6%}.brand{font-size:21px;gap:8px}.beta{display:none}nav{gap:17px;font-size:12px}nav>a:nth-child(2){display:none}.nav-download{padding:9px 11px}.nav-download span{margin-left:3px}.hero{padding:60px 6% 0}h1{font-size:58px;line-height:1.25}.hero-bottom{display:block}.hero-bottom p{font-size:16px}.watch{margin-top:24px;font-size:14px}.hero-index{margin-top:40px;font-size:10px;gap:15px;line-height:1.7}.hero-index span{max-width:130px;text-align:right}.demo-section{padding:35px 5% 30px}.section-head{display:block}.section-head h2{font-size:24px}.duration{display:block;margin-top:14px}.video-meta{font-size:10px;gap:14px}.video-meta span{width:100%;line-height:1.7}.chapters{grid-template-columns:repeat(2,1fr)}.chapters button{padding:18px 10px;font-size:12px}.chapters button:nth-child(2){border-right:0}.chapters button:nth-child(-n+2){border-bottom:1px solid #dbd8d1}.chapters small{font-size:9px}.workflow{display:block;padding:60px 6%}.workflow aside{position:static;margin-bottom:40px}.workflow aside h2 br{display:none}.steps article{grid-template-columns:25px 1fr;gap:12px}.steps h3{font-size:19px}.file{padding:14px;font-size:12px}.file small{font-size:10px}.download{display:block;padding:55px 6%}.download h2{font-size:37px}.release{margin-top:45px}.faq{display:block;padding:60px 6%}.faq h2{margin-bottom:30px}.faq summary{font-size:14px}footer{flex-wrap:wrap;gap:15px}footer p{font-size:10px}footer>a:last-child{width:100%;margin:0;font-size:11px}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}
