:root{color-scheme:light;--paper:#f7f9fd;--ink:#202a43;--muted:#58647b;--blue:#455cdb;--line:#dce2ee;--wash:#edf1fa;--white:#fff}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:28px}body{margin:0;background:var(--paper);color:var(--ink);font:1rem/1.75 -apple-system,BlinkMacSystemFont,"Segoe UI","Noto Sans CJK SC",sans-serif}a{color:inherit;text-underline-offset:5px}button{font:inherit}button,a{-webkit-tap-highlight-color:transparent}button:focus-visible,a:focus-visible,summary:focus-visible{outline:3px solid var(--blue);outline-offset:5px}img,video{max-width:100%}.wrap{width:min(1140px,calc(100% - 80px));margin-inline:auto}.skip{position:fixed;left:20px;top:-90px;z-index:9;padding:10px 18px;background:var(--ink);color:#fff}.skip:focus{top:14px}
.header{min-height:94px;display:flex;align-items:center;justify-content:space-between;gap:24px;border-bottom:1px solid var(--line)}.brand{display:inline-flex;align-items:center;gap:12px;text-decoration:none;font-size:1.45rem;font-weight:750;letter-spacing:-.6px}.brand img{flex:none}.brand small{font-size:.85rem;font-weight:500;letter-spacing:0;margin-left:6px;color:var(--muted)}.header nav{display:flex;flex-wrap:wrap;gap:26px;align-items:center;font-size:.92rem}.header nav a{text-decoration:none}.header nav a:hover{color:var(--blue)}
.hero{text-align:center;padding-top:69px}.eyebrow{font-size:.82rem;font-weight:650;letter-spacing:.12em;margin:0 0 24px;color:var(--muted)}h1,h2,h3{overflow-wrap:anywhere;line-height:1.22;font-family:"Trebuchet MS",-apple-system,BlinkMacSystemFont,"Segoe UI","Noto Sans CJK SC",sans-serif}h1{font-size:clamp(2.65rem,5.8vw,4.75rem);font-weight:750;letter-spacing:-.045em;margin:0}h1 span{color:var(--blue)}html[lang="zh-CN"] h1{letter-spacing:-.035em}.intro{font-size:1.12rem;line-height:1.85;color:var(--muted);max-width:700px;margin:27px auto 30px}.hero-actions{display:flex;justify-content:center;align-items:center;gap:30px}.button{display:inline-flex;align-items:center;gap:32px;padding:15px 25px;background:var(--blue);border-radius:7px;color:#fff;font-weight:650;text-decoration:none;transition:background .15s}.button:hover{background:#334bc4}.text-link{font-weight:600;text-decoration-thickness:1px}.platforms{font-size:.85rem;color:var(--muted);margin:19px 0 46px}
.app-showcase{max-width:1020px;margin:0 auto;background:var(--wash);border:1px solid var(--line);padding:0 15px 12px;border-radius:16px;box-shadow:0 18px 46px #2937580c;overflow:hidden}.showcase-top{min-height:64px;display:flex;align-items:center;justify-content:space-between;gap:20px;padding:10px 4px}.window-title{font-size:.84rem;font-weight:650}.view-switch{display:flex;gap:5px;flex-wrap:wrap;justify-content:flex-end}.view-switch button{border:0;border-radius:5px;background:transparent;color:var(--muted);padding:6px 13px;font-size:.84rem;cursor:pointer}.view-switch button:hover{background:#ffffff80}.view-switch button[aria-pressed="true"]{background:#fff;color:var(--blue);box-shadow:0 1px 4px #202a430d}.app-showcase>a{display:block;border:1px solid #d9dfeb;border-radius:7px;overflow:hidden;background:#fff}.app-showcase img{display:block;width:100%;height:auto}.app-showcase figcaption{font-size:.87rem;padding:13px 8px 1px;color:var(--muted)}.screenshot-note{font-size:.81rem;color:var(--muted);margin:15px 0 0}
h2{font-size:clamp(2rem,3.5vw,2.85rem);letter-spacing:-.035em;font-weight:700;margin:0 0 23px}h3{font-size:1.17rem;letter-spacing:-.01em;margin:0 0 14px}p{margin:0 0 16px}.features{display:grid;grid-template-columns:.85fr 1.35fr;gap:86px;padding-block:105px}.feature-heading>p:not(.eyebrow){color:var(--muted);margin-bottom:24px;max-width:340px}.feature-grid{display:grid;grid-template-columns:1fr 1fr;gap:30px 34px}.feature-grid article{border-top:1px solid var(--line);padding-top:24px}.feature-grid p{font-size:.95rem;color:var(--muted);margin:0}.feature-grid .extra{grid-column:1/-1;font-size:.87rem;line-height:1.85;border-top:1px solid var(--line);padding-top:23px}
.demo{padding-block:83px;background:var(--wash);border-block:1px solid var(--line)}.section-intro{text-align:center;max-width:670px;margin:0 auto 40px}.section-intro>p:last-child{color:var(--muted);font-size:1.05rem}.demo video{display:block;width:100%;max-width:980px;height:auto;aspect-ratio:1280/796;object-fit:contain;margin:auto;border-radius:10px;background:#101725;box-shadow:0 14px 36px #23365312}.chapters{max-width:980px;margin:16px auto 0;display:grid;grid-template-columns:repeat(4,1fr);gap:8px}.chapters button{cursor:pointer;background:transparent;border:0;border-bottom:1px solid #cbd4e7;text-align:left;padding:9px 4px;font-size:.88rem;color:var(--ink)}.chapters button:hover,.chapters button[aria-pressed="true"]{border-color:var(--blue);color:var(--blue)}.chapters span{display:block;color:var(--muted);font-size:.75rem;font-variant-numeric:tabular-nums}.demo-note{font-size:.81rem;text-align:center;color:var(--muted);margin:22px 0 0}.demo-note a{margin-left:8px}
.downloads{padding-block:99px 90px}.download-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}.download-grid article{padding:28px;background:#fff;border:1px solid var(--line);border-radius:10px;display:flex;flex-direction:column;align-items:stretch}.os-symbol{font-size:2.4rem;line-height:1.2;color:var(--blue);margin-bottom:16px}.linux-symbol{font:700 1.9rem/1.5 monospace}.download-grid h3{font-size:1.35rem;margin:0 0 5px}.os-version{font-size:.84rem;color:var(--muted);margin-bottom:23px}.download-link{display:flex;justify-content:space-between;align-items:center;gap:12px;font-weight:600;text-decoration:none;font-size:.91rem;border-top:1px solid var(--line);padding:13px 0;color:var(--blue)}.download-link>span{white-space:nowrap;font-size:.82rem;font-weight:400}.download-link:hover{text-decoration:underline}.install-note{color:var(--muted);font-size:.82rem;line-height:1.8;margin:auto 0 0;padding-top:20px}.download-more{display:flex;justify-content:center;gap:28px;flex-wrap:wrap;font-size:.87rem;margin-top:30px}
.faq{border-top:1px solid var(--line);padding-block:68px 94px;display:grid;grid-template-columns:.85fr 1.35fr;gap:86px}.faq h2{font-size:2rem}.faq details{border-bottom:1px solid var(--line)}.faq summary{position:relative;cursor:pointer;list-style:none;padding:19px 32px 19px 0;font-weight:600;line-height:1.6}.faq summary::-webkit-details-marker{display:none}.faq summary:after{content:'+';position:absolute;right:4px;top:17px;font-size:1.3rem;font-weight:400;color:var(--blue)}.faq details[open] summary:after{content:'−'}.faq details p{color:var(--muted);font-size:.94rem;padding:0 25px 10px 0}.footer{border-top:1px solid var(--line);padding-block:33px 42px;display:flex;justify-content:space-between;align-items:center;gap:25px}.footer .brand{font-size:1.16rem}.footer p{font-size:.81rem;color:var(--muted);margin:11px 0 0}.footer nav{display:flex;flex-wrap:wrap;gap:24px;font-size:.85rem}.footer nav a{text-decoration:none}.footer nav a:hover{text-decoration:underline}
@media(max-width:900px){.wrap{width:calc(100% - 48px)}.header nav{gap:17px}.hero{padding-top:56px}.features,.faq{gap:38px;grid-template-columns:1fr 1.5fr}.download-grid{gap:12px}.download-grid article{padding:22px}.window-title{display:none}.showcase-top{justify-content:center}.footer nav{gap:14px}}
@media(max-width:650px){.wrap{width:calc(100% - 36px)}.header{flex-wrap:wrap;gap:13px;padding-block:19px}.brand{font-size:1.3rem}.header nav{width:100%;justify-content:space-between;gap:10px;font-size:.85rem}.hero{padding-top:43px}.eyebrow{font-size:.76rem;letter-spacing:.06em;margin-bottom:20px}h1{font-size:2.65rem;letter-spacing:-.045em}html[lang="en"] h1{font-size:2.8rem}.intro{font-size:1rem;margin-block:23px 27px}.intro br{display:none}.hero-actions{flex-direction:column;gap:19px}.button{padding:13px 23px}.platforms{font-size:.77rem;margin:23px 0 30px}.app-showcase{padding:0 6px 8px;border-radius:9px}.showcase-top{padding:8px 0;min-height:53px}.view-switch{gap:0;justify-content:center}.view-switch button{font-size:.76rem;padding:6px 9px;min-height:36px}.app-showcase figcaption{font-size:.78rem;line-height:1.5;padding:11px 5px 3px}.screenshot-note{font-size:.75rem}.features,.faq{grid-template-columns:1fr;gap:30px;padding-block:62px}.feature-heading>p:not(.eyebrow){max-width:none}.feature-grid{gap:26px 24px}.feature-grid article{padding-top:18px}.feature-grid h3{font-size:1.08rem}.feature-grid p{font-size:.92rem}.demo{padding-block:60px}.section-intro{margin-bottom:30px}.section-intro>p:last-child{font-size:1rem}.chapters{grid-template-columns:repeat(2,1fr)}.chapters button{min-height:59px}.demo-note{text-align:left;line-height:1.7}.downloads{padding-block:64px}.download-grid{grid-template-columns:1fr;gap:16px}.download-grid article{padding:25px}.os-symbol{font-size:2rem}.install-note{padding-top:13px}.download-more{gap:17px;text-align:center}.footer{align-items:flex-start;flex-direction:column}.faq{padding-bottom:63px}.footer nav{font-size:.87rem}}
@media(max-width:380px){.feature-grid{grid-template-columns:1fr}.hero h1{font-size:2.25rem}html[lang="en"] h1{font-size:2.45rem}.header nav{font-size:.79rem}.view-switch button{padding:6px 7px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}
/* Practical guides continue the product site's quiet document layout. */
.guides{display:grid;grid-template-columns:.85fr 1.35fr;gap:86px;padding-block:0 92px}.guides>div>p:last-child{color:var(--muted);max-width:340px}.guide-list{list-style:none;margin:0;padding:0}.guide-list li{display:flex;gap:22px;padding:22px 0;border-top:1px solid var(--line)}.guide-list li>span{font:500 .8rem/1.8 ui-monospace,monospace;color:var(--blue);padding-top:2px}.guide-list h3{margin:0 0 10px}.guide-list h3 a{text-decoration:none}.guide-list h3 a:hover{text-decoration:underline;color:var(--blue)}.guide-list p{color:var(--muted);font-size:.9rem;margin:0}
.guide-page{padding-block:64px 85px}.guide-heading{max-width:900px;margin-bottom:52px}.guide-heading>.eyebrow{display:inline-block;letter-spacing:.02em;text-decoration:none}.guide-heading h1{font-size:clamp(2.1rem,4.4vw,3.6rem);letter-spacing:-.035em}.guide-heading .intro{margin:22px 0 16px;max-width:780px}.guide-note{font-size:.8rem;color:var(--muted)}.guide-layout{display:grid;grid-template-columns:220px minmax(0,1fr);gap:60px}.guide-toc nav{position:sticky;top:30px;font-size:.88rem}.guide-toc p{font-weight:650;margin-bottom:12px}.guide-toc ol{padding-left:21px;margin:0;color:var(--muted)}.guide-toc li{margin:9px 0;padding-left:4px}.guide-toc a{text-decoration:none}.guide-toc a:hover{color:var(--blue);text-decoration:underline}.guide-body{min-width:0;overflow-wrap:anywhere}.guide-body section+section{margin-top:52px}.guide-body h2{font-size:1.65rem;letter-spacing:-.02em;margin:0 0 20px;scroll-margin-top:26px}.guide-body p{margin-bottom:18px}.guide-steps{padding-left:25px}.guide-steps li{padding-left:5px;margin-block:12px}.guide-body pre{padding:18px;background:var(--wash);border:1px solid var(--line);border-radius:6px;max-width:100%;overflow:auto;font:.88rem/1.75 ui-monospace,SFMono-Regular,Consolas,monospace}.guide-body figure{margin:28px 0}.guide-body figure img{width:100%;height:auto;display:block;border:1px solid var(--line);border-radius:8px}.guide-body figcaption{color:var(--muted);font-size:.82rem;margin-top:10px}.guide-next{border-top:1px solid var(--line);margin-top:50px;padding-top:30px}.guide-next ul{padding-left:21px}.guide-next li{margin-block:12px}.guide-next>a{font-size:.9rem}
@media(max-width:900px){.guides{gap:35px}.guide-layout{grid-template-columns:180px minmax(0,1fr);gap:32px}}
@media(max-width:650px){.guides{grid-template-columns:1fr;gap:20px;padding-bottom:55px}.guide-page{padding-block:38px 55px}.guide-heading{margin-bottom:30px}.guide-layout{grid-template-columns:minmax(0,1fr);gap:32px}.guide-toc{border-block:1px solid var(--line);padding:18px 0}.guide-toc nav{position:static}.guide-body h2{font-size:1.4rem}.guide-body section+section{margin-top:36px}.guide-list li{gap:14px}}