/* Native CSS brand system. Variance 7 / motion 4 / density 3.
   Layers: content 0, header 10, native dialog top layer.
   Radii: controls 12px, surfaces 24px, circular media 50%. */
:root{color-scheme:light dark;--bg:#fbfbfe;--surface:#f2f2f8;--paper:#fdfdff;--soft:#eeedf8;--text:#252334;--muted:#656274;--line:#e4e3ed;--accent:#6550c5;--accent-hover:#5340aa;--on-accent:#fdfcff;--shadow:0 24px 70px #38305014;--header:#fbfbfee8;--icon-filter:none}
@media(prefers-color-scheme:dark){:root:not([data-theme=light]){--bg:#17161e;--surface:#212029;--paper:#25232f;--soft:#272336;--text:#f0edf9;--muted:#b7b2c6;--line:#38333f;--accent:#aa97f1;--accent-hover:#bcaafa;--on-accent:#23153f;--shadow:0 24px 70px #0c091a45;--header:#17161eeb}}
:root[data-theme=dark]{--bg:#17161e;--surface:#212029;--paper:#25232f;--soft:#272336;--text:#f0edf9;--muted:#b7b2c6;--line:#38333f;--accent:#aa97f1;--accent-hover:#bcaafa;--on-accent:#23153f;--shadow:0 24px 70px #0c091a45;--header:#17161eeb}
*,*::before,*::after{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:100px}body{margin:0;background:var(--bg);color:var(--text);font-family:"PingFang SC","Microsoft YaHei UI","Microsoft YaHei",system-ui,sans-serif;-webkit-font-smoothing:antialiased;font-size:15px;line-height:1.7}button,a{-webkit-tap-highlight-color:transparent}button,input,select{font:inherit}button,a{touch-action:manipulation}button{cursor:pointer}a{color:inherit;text-decoration:none}p,h1,h2,h3,figure{margin:0}button{border:0}img,video{max-width:100%;display:block}button:focus-visible,a:focus-visible,summary:focus-visible,[tabindex]:focus-visible{outline:3px solid var(--accent);outline-offset:5px}button:disabled{cursor:default}.container{width:min(1200px,calc(100% - 96px));margin-inline:auto}.section{padding-block:88px}.icon{height:21px;width:21px;display:inline-block;vertical-align:middle;flex-shrink:0;fill:currentColor}.skip-link{position:fixed;top:10px;left:10px;padding:10px 20px;background:var(--text);color:var(--bg);transform:translateY(-160%);z-index:20}.skip-link:focus{transform:none}.site-header{position:sticky;top:0;z-index:10;background:var(--header);backdrop-filter:blur(18px);border-bottom:1px solid var(--line)}.nav{height:78px;display:flex;align-items:center;justify-content:space-between;gap:32px}.brand{display:inline-flex;align-items:center;gap:9px;flex-shrink:0}.brand>span{font-size:22px;font-weight:750;letter-spacing:-.7px;display:flex;align-items:baseline;gap:8px}.brand small{font-size:13px;letter-spacing:-.1px;color:var(--muted);font-weight:550}.nav-links{display:flex;gap:34px;margin-left:50px}.nav-links a{color:var(--muted);font-size:13px;transition:color .2s}.nav-links a:hover{color:var(--accent)}.nav-actions{display:flex;align-items:center;gap:15px}.icon-button{display:inline-grid;place-items:center;min-width:40px;min-height:40px;color:var(--muted);border-radius:12px;background:transparent;transition:background .2s,color .2s}.icon-button:hover{background:var(--soft);color:var(--accent)}.button{min-height:52px;padding:13px 23px;border-radius:12px;display:inline-flex;align-items:center;justify-content:center;gap:10px;line-height:1.3;font-weight:650;font-size:14px;white-space:nowrap;transition:transform .2s,background .2s,box-shadow .2s}.button:hover{transform:translateY(-2px)}.button:active{transform:translateY(0)}.button-primary{background:var(--accent);color:var(--on-accent);box-shadow:0 5px 15px #6550c51c}.button-primary:hover{background:var(--accent-hover)}.button-small{min-height:39px;font-size:12px;padding:10px 16px}.button-small .icon{width:16px;height:16px}.button-dark{background:var(--text);color:var(--bg)}.button-dark:hover{background:var(--accent);color:var(--on-accent)}.button-text{background:transparent;color:var(--text);padding-inline:12px}.button-text:hover{background:var(--soft)}.button-outline{border:1px solid var(--line);background:var(--paper);color:var(--text)}.button-outline:hover{background:var(--surface)}.hero{display:grid;grid-template-columns:.82fr 1.18fr;align-items:center;gap:48px;padding-top:77px;padding-bottom:64px;min-height:596px}.hero-copy{padding-bottom:8px}.eyebrow{font-size:12px;letter-spacing:2px;color:var(--accent);font-weight:650;margin-bottom:23px}.hero h1{font-size:clamp(38px,3.8vw,55px);line-height:1.35;font-weight:760;letter-spacing:-2px;white-space:nowrap}.hero h1 span{display:block;color:var(--accent)}.hero-description{margin-top:24px;max-width:350px;line-height:1.95;color:var(--muted);font-size:15px}.hero-actions{display:flex;align-items:center;gap:12px;margin-top:31px}.hero-visual{min-width:0;align-self:center}.film-frame{position:relative;background:#141828;border-radius:24px;overflow:hidden;box-shadow:var(--shadow);border:1px solid #625d8125;transform:perspective(1600px) rotateY(-3deg) rotateX(1deg)}.film-frame video{width:100%;height:auto;aspect-ratio:16/9;object-fit:contain}.film-control{position:absolute;right:19px;bottom:18px;width:43px;height:43px;border-radius:50%;display:grid;place-items:center;background:#fdfdfff0;color:#292237;box-shadow:0 3px 16px #14182830;transition:transform .2s}.film-control:hover{transform:scale(1.07)}.film-control .icon{width:17px;height:17px}.hero-visual figcaption{font-size:10px;display:flex;justify-content:space-between;color:var(--muted);gap:10px;margin:17px 5px 0}.hero-visual figcaption>span:last-child{display:inline-flex;align-items:center;gap:7px}.hero-visual figcaption .icon{width:12px;height:12px}.essentials{display:grid;grid-template-columns:repeat(3,1fr);gap:25px;padding-block:25px;border-block:1px solid var(--line)}.essentials p{display:flex;gap:11px;justify-content:center;align-items:center;font-size:13px;color:var(--muted)}.essentials .icon{color:var(--accent);width:19px;height:19px}.section-heading{margin-bottom:37px}.section-heading h2{font-size:32px;letter-spacing:-1px;line-height:1.4;font-weight:730}.section-heading p{color:var(--muted);margin-top:13px;font-size:14px}.experience-tabs{display:flex;gap:30px;border-bottom:1px solid var(--line);margin-bottom:35px}.experience-tabs button{display:inline-flex;align-items:center;gap:8px;background:none;color:var(--muted);padding:14px 5px 17px;border-bottom:2px solid transparent;font-size:13px;font-weight:600;margin-bottom:-1px;transition:color .2s,border-color .2s}.experience-tabs button[aria-selected=true]{color:var(--accent);border-bottom-color:var(--accent)}.experience-tabs .icon{width:18px;height:18px}.experience-panel{display:grid;grid-template-columns:1.45fr 1fr;gap:60px;align-items:center}.experience-media{min-width:0;background:var(--soft);border-radius:24px;overflow:hidden;position:relative;min-height:360px;display:flex;align-items:center;justify-content:center;border:1px solid var(--line)}.experience-media>img{width:100%;height:auto;aspect-ratio:1.472;object-fit:contain}.experience-media[data-scene=record]{background:var(--soft)}.experience-media[data-scene=record]>img{opacity:1}.toolbar-display{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;padding:20px}.toolbar-display img{width:100%;height:auto;border-radius:14px;box-shadow:0 13px 50px #201b3a30}.experience-media[data-scene=export]>img{aspect-ratio:1.472;object-fit:contain;background:#141828}.section-label{font-size:12px;color:var(--accent);margin-bottom:12px;font-weight:600}.experience-copy h3{font-size:25px;line-height:1.5;letter-spacing:-.7px;max-width:330px}.experience-copy>p:not(.section-label){font-size:13px;color:var(--muted);line-height:1.95;max-width:330px;margin-top:16px}.experience-copy ul{padding:0;list-style:none;margin:24px 0 23px;display:grid;gap:12px}.experience-copy li{display:flex;align-items:center;gap:9px;font-size:12px;color:var(--muted)}.experience-copy li .icon{height:15px;width:15px;color:var(--accent)}.text-link{display:inline-flex;align-items:center;gap:6px;color:var(--accent);font-size:12px;font-weight:600}.text-link .icon{width:15px;height:15px}.text-link:hover{text-decoration:underline;text-underline-offset:4px}.details{padding-top:38px}.details-grid{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center}.detail-photo{display:grid;grid-template-columns:.8fr 1fr;align-items:center;gap:25px;padding:35px;background:var(--soft);border-radius:24px;min-height:318px}.presenter-portrait{aspect-ratio:1;border-radius:50%;overflow:hidden;border:5px solid var(--paper);box-shadow:0 14px 30px #40315415}.presenter-portrait img{height:100%;width:100%;object-fit:cover}.detail-photo>div:last-child>.icon{color:var(--accent);margin-bottom:12px;width:24px;height:24px}.details h3{font-size:18px;line-height:1.6;letter-spacing:-.4px}.details p{font-size:12px;color:var(--muted);line-height:1.9;margin-top:10px}.detail-stack{display:grid;gap:25px}.detail-row{display:grid;grid-template-columns:25px 1fr;gap:15px}.detail-row>.icon{color:var(--accent);margin-top:4px;width:23px;height:23px}.detail-row h3{font-size:16px}.detail-row p{margin-top:6px;max-width:380px}.quiet-features{margin-top:50px;display:grid;grid-template-columns:1fr 1fr;gap:70px;padding:36px 0 0;border-top:1px solid var(--line)}.quiet-features>div>.icon{width:30px;height:30px;color:var(--accent);margin-bottom:13px}.quiet-features p{max-width:390px}.format-name{font-family:ui-sans-serif,system-ui,sans-serif;display:block;font-size:28px;letter-spacing:-1px;font-weight:650;line-height:1.2;margin-bottom:14px}.format-name>span{font-weight:400;color:var(--line);padding-inline:9px}.download-section{padding-top:30px}.download-shell{background:var(--soft);border-radius:28px;padding:60px;display:grid;grid-template-columns:1fr 1fr;gap:85px}.download-intro>img{margin-bottom:25px}.download-intro h2{font-size:34px;line-height:1.55;letter-spacing:-1px;font-weight:720}.download-intro h2 span{display:block}.download-intro>p{color:var(--muted);font-size:13px;margin-top:14px}.checksum-link{display:inline-flex;align-items:center;gap:7px;margin-top:30px;font-size:11px;color:var(--muted)}.checksum-link:hover{color:var(--accent)}.checksum-link .icon{height:15px;width:15px}.platform-tabs{display:grid;grid-template-columns:1fr 1fr;gap:5px;background:var(--bg);border-radius:14px;padding:5px;margin-bottom:22px;border:1px solid var(--line)}.platform-tabs button{display:flex;align-items:center;justify-content:center;gap:8px;border-radius:10px;background:transparent;color:var(--muted);font-size:12px;padding:10px;font-weight:600;transition:background .2s,color .2s}.platform-tabs button[aria-selected=true]{background:var(--text);color:var(--bg)}.platform-tabs .icon{width:17px;height:17px}.download-meta{display:flex;justify-content:space-between;gap:10px;font-size:10px;color:var(--muted);margin-bottom:14px}.download-file{width:100%;justify-content:flex-start;gap:14px;min-height:73px;padding:15px 18px;margin-top:10px;white-space:normal}.download-file>.icon:first-child{height:23px;width:23px}.download-file>.icon:last-child{margin-left:auto;width:18px;height:18px}.download-file span{font-size:13px;line-height:1.5}.download-file small{display:block;font-size:10px;font-weight:450;opacity:.85;margin-top:4px}.install-note{font-size:11px;color:var(--muted);line-height:1.9;margin-top:17px}.guide-link{font-size:11px;margin-top:13px}.beta-note{margin-top:25px;padding-top:17px;border-top:1px solid var(--line);font-size:10px;line-height:1.9;color:var(--muted)}.faq{padding-top:7px;display:grid;grid-template-columns:.85fr 1.15fr;gap:80px}.faq-heading h2{font-size:27px;letter-spacing:-.7px;line-height:1.55}.faq-heading h2 span{display:block}.faq-heading>p{color:var(--muted);font-size:12px;margin-top:16px}.faq-list details{border-bottom:1px solid var(--line);padding:0}.faq-list summary{cursor:pointer;list-style:none;display:flex;align-items:center;justify-content:space-between;gap:20px;padding:18px 0;font-size:13px;font-weight:600}.faq-list summary::-webkit-details-marker{display:none}.faq-list summary>.icon{height:15px;width:15px;transition:transform .2s}.faq-list details[open] summary>.icon{transform:rotate(180deg)}.faq-list details>p{font-size:12px;color:var(--muted);line-height:1.95;margin:0 25px 22px 0}.faq-list code{font-size:11px;overflow-wrap:anywhere}.footer{padding-block:30px;display:flex;align-items:center;justify-content:space-between;gap:20px;border-top:1px solid var(--line)}.footer .brand>span{font-size:19px}.footer .brand small{font-size:11px}.footer p{font-size:11px;color:var(--muted)}.footer>.text-link{font-size:11px}dialog{width:min(960px,calc(100vw - 32px));padding:20px;border:1px solid var(--line);border-radius:24px;background:var(--paper);color:var(--text);box-shadow:var(--shadow)}dialog::backdrop{background:#191527b8;backdrop-filter:blur(8px)}.modal-header{display:flex;align-items:center;justify-content:space-between;gap:15px;margin-bottom:15px}.modal-header h2{font-size:16px}.modal-header+video{border-radius:12px;width:100%;height:auto;max-height:70dvh}.modal-header~p{font-size:11px;color:var(--muted);margin-top:14px}.js .reveal{transition:opacity .7s,transform .7s cubic-bezier(.2,.75,.2,1)}.js .reveal:not(.is-visible){opacity:0;transform:translateY(18px)}[hidden]{display:none!important}
@media(min-width:1550px){.hero{min-height:660px}.hero h1{font-size:59px}.hero-description{font-size:16px;max-width:365px}}
@media(max-width:1100px){.container{width:calc(100% - 64px)}.hero{gap:27px;padding-top:58px;min-height:540px}.hero h1{font-size:43px;letter-spacing:-1.8px}.hero-description{font-size:13px}.hero-actions{gap:2px}.hero-actions .button{padding-inline:15px;font-size:12px}.experience-panel{gap:35px;grid-template-columns:1.35fr 1fr}.experience-media{min-height:300px}.experience-copy h3{font-size:22px}.details-grid{gap:35px}.detail-photo{grid-template-columns:1fr;padding:27px;gap:20px}.presenter-portrait{width:120px}.detail-photo>div:last-child>.icon{display:none}.download-shell{gap:45px;padding:42px}.download-intro h2{font-size:30px}.faq{gap:45px}.nav-links{margin-left:0}}
@media(max-width:767px){.container{width:calc(100% - 40px)}.section{padding-block:57px}.nav{height:66px;gap:10px}.brand>span{font-size:20px}.brand small{font-size:11px}.brand>img{width:33px;height:33px}.nav-links{display:none}.nav-actions{gap:5px}.nav-actions .button-small{font-size:11px;padding:10px 12px;min-height:36px}.nav-actions .button-small .icon{display:none}.icon-button{min-height:36px;min-width:36px}.hero{grid-template-columns:1fr;gap:39px;padding-top:43px;padding-bottom:35px;min-height:auto}.hero-copy{padding-bottom:0}.eyebrow{font-size:11px;margin-bottom:19px}.hero h1{font-size:clamp(35px,8.5vw,48px);letter-spacing:-1.6px;line-height:1.35}.hero-description{font-size:13px;max-width:360px;margin-top:20px;line-height:1.9}.hero-actions{margin-top:25px;gap:12px}.hero-actions .button{min-height:47px;font-size:12px;padding-inline:18px}.hero-visual{padding-inline:0}.film-frame{transform:none;border-radius:20px}.hero-visual figcaption{font-size:9px;margin-top:13px}.film-control{width:37px;height:37px;right:13px;bottom:13px}.essentials{gap:10px;padding-block:22px;grid-template-columns:1fr}.essentials p{justify-content:flex-start;gap:10px;font-size:11px}.essentials p .icon{height:17px;width:17px}.section-heading h2{font-size:25px;letter-spacing:-.9px}.section-heading p{font-size:12px;max-width:300px;line-height:1.8;margin-top:12px}.section-heading{margin-bottom:25px}.experience-tabs{gap:0;justify-content:space-between;margin-bottom:24px}.experience-tabs button{font-size:10px;gap:4px;padding:12px 2px 14px}.experience-tabs .icon{height:14px;width:14px}.experience-panel{grid-template-columns:1fr;gap:25px}.experience-media{min-height:0;aspect-ratio:1.472;border-radius:18px}.toolbar-display{padding:10px}.toolbar-display img{border-radius:6px}.experience-copy h3{font-size:22px;max-width:none}.experience-copy>p:not(.section-label){font-size:12px;max-width:none;margin-top:11px}.experience-copy ul{margin-block:17px;gap:9px}.experience-copy li{font-size:11px}.section-label{font-size:11px;margin-bottom:7px}.details{padding-top:0}.details-grid{grid-template-columns:1fr;gap:30px}.detail-photo{grid-template-columns:.75fr 1.25fr;padding:23px;gap:22px;min-height:220px}.presenter-portrait{width:100%}.details h3{font-size:16px}.details p{font-size:11px;margin-top:7px}.detail-stack{gap:23px}.detail-row{grid-template-columns:23px 1fr;gap:13px}.detail-row h3{font-size:15px}.detail-row>.icon{width:20px;height:20px}.quiet-features{grid-template-columns:1fr;gap:30px;margin-top:31px;padding-top:28px}.format-name{font-size:26px;margin-bottom:13px}.download-section{padding-top:0}.download-shell{grid-template-columns:1fr;padding:27px 22px;gap:30px;border-radius:22px}.download-intro>img{width:52px;height:52px;margin-bottom:17px}.download-intro h2{font-size:28px;line-height:1.45}.download-intro>p{font-size:12px;margin-top:13px}.checksum-link{margin-top:19px}.platform-tabs{margin-bottom:17px}.download-meta{font-size:9px}.download-file{padding-inline:14px}.download-file span{font-size:12px}.download-file small{font-size:9px}.install-note,.guide-link{font-size:10px}.beta-note{font-size:9px}.faq{padding-top:0;grid-template-columns:1fr;gap:23px}.faq-heading h2{font-size:25px}.faq-heading h2 span{display:inline}.faq-heading>p{margin-top:11px}.faq-list summary{font-size:12px}.faq-list details>p{font-size:11px;margin-right:0}.footer{padding-block:25px;flex-wrap:wrap;gap:15px}.footer .brand small{display:none}.footer p{font-size:10px;order:3;width:100%}.footer .text-link{margin-left:auto}.modal-header h2{font-size:13px}dialog{padding:14px}.modal-header~p{font-size:10px}}
/* Latest library actions; retain the existing brand and page rhythm. */
.library-update{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:center;margin-top:48px;padding:32px 36px;border:1px solid var(--line);border-radius:24px;background:var(--soft)}
.library-update h3{font-size:26px;line-height:1.5;letter-spacing:-.7px}.library-update-copy>p:last-child{margin-top:12px;max-width:360px;font-size:13px;color:var(--muted);line-height:1.9}.library-update-actions{list-style:none;margin:0;padding:0;display:grid;gap:22px}.library-update-actions li{display:flex;gap:14px;align-items:flex-start}.library-update-actions .icon{width:23px;height:23px;margin-top:3px;color:var(--accent)}.library-update-actions h4{margin:0;font-size:15px;font-weight:650}.library-update-actions p{margin-top:4px;font-size:12px;color:var(--muted);line-height:1.8}.download-guides{display:flex;flex-wrap:wrap;column-gap:20px;row-gap:8px;align-items:center}
@media(max-width:1023px){.library-update{gap:32px;padding:28px}.library-update h3{font-size:23px}}
@media(max-width:767px){.library-update{grid-template-columns:1fr;gap:24px;margin-top:30px;padding:23px;border-radius:20px}.library-update h3{font-size:21px}.library-update-copy>p:last-child{font-size:12px;margin-top:9px;max-width:none}.library-update-actions{gap:18px}.library-update-actions h4{font-size:14px}.library-update-actions p{font-size:11px}.library-update-actions .icon{width:21px;height:21px}.download-guides{column-gap:16px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{animation:none!important;transition:none!important}.js .reveal:not(.is-visible){opacity:1;transform:none}.film-frame{transform:none}}
@media(prefers-reduced-transparency:reduce){.site-header{background:var(--bg);backdrop-filter:none}dialog::backdrop{backdrop-filter:none}}