:root{color-scheme:dark;--bg:#090b0d;--surface:#111518;--ink:#eef0ee;--muted:#a1aaa9;--line:#353c3e;--silver:#b8c5c7;--gutter:clamp(24px,5vw,88px);--ease:cubic-bezier(.2,.75,.2,1)}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:110px}body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.7 'Microsoft YaHei UI','PingFang SC',system-ui,sans-serif}a{color:inherit;text-decoration:none}button{font:inherit;color:inherit;cursor:pointer}a,button{touch-action:manipulation}a:focus-visible,button:focus-visible{outline:2px solid var(--ink);outline-offset:6px}::selection{background:var(--silver);color:var(--bg)}.skip-link{position:fixed;z-index:100;top:8px;left:20px;padding:12px;background:var(--ink);color:var(--bg);transform:translateY(-160%)}.skip-link:focus{transform:none}
.header{position:absolute;z-index:20;top:0;left:0;width:100%;padding:27px var(--gutter);display:flex;align-items:center;justify-content:space-between;gap:24px}.brand{display:flex;align-items:center;gap:12px;min-height:44px;font-size:22px;font-weight:650;letter-spacing:-.04em}.brand img{border-radius:8px}.brand b{font-weight:350;color:var(--muted)}.header nav{display:flex;gap:40px;align-items:center;font-size:14px}.header nav a{min-height:44px;display:flex;align-items:center;gap:18px;transition:color .2s}.header nav a:hover{color:var(--silver)}
.opening{position:relative}.stage{position:relative;min-height:850px;height:100svh;overflow:hidden;background:var(--bg)}.enhanced .opening{height:250svh}.enhanced .stage{position:sticky;top:0;height:100svh;min-height:640px}#sound{position:absolute;inset:0;width:100%;height:100%;opacity:0;transition:opacity 1.3s}.canvas-ready #sound{opacity:1}.stage-shade{position:absolute;inset:0;pointer-events:none;background:linear-gradient(90deg,var(--bg),transparent 68%),linear-gradient(0deg,var(--bg),transparent 18%)}.hero-copy{position:absolute;top:48%;left:var(--gutter);transform:translateY(-44%);max-width:850px;z-index:2}.eyebrow{font-size:12px;letter-spacing:.15em;font-weight:400;color:var(--muted);margin:0 0 30px;display:flex;align-items:center;gap:14px}.tiny-line{height:1px;width:32px;background:var(--silver)}h1,h2,h3,p{overflow-wrap:break-word}h1{font-size:clamp(42px,4.1vw,76px);line-height:1.35;font-weight:450;letter-spacing:-.05em;margin:0;text-wrap:balance}h1 span,h2 span{color:var(--muted)}.intro{font-size:16px;line-height:1.9;margin:30px 0 36px;color:var(--muted)}.round-link{display:inline-flex;align-items:center;gap:16px;min-height:52px;font-size:14px}.round-link__icon{height:50px;width:50px;border:1px solid var(--line);border-radius:50%;display:grid;place-items:center;font-size:20px;transition:background .25s,border-color .25s}.round-link:hover .round-link__icon{background:var(--surface);border-color:var(--silver)}.stage-footer{position:absolute;z-index:5;left:var(--gutter);right:var(--gutter);bottom:30px;display:flex;justify-content:space-between;align-items:center;font-size:12px;color:var(--muted);gap:16px}.stage-footer a,.stage-footer button{display:flex;align-items:center;gap:18px;min-height:44px}.stage-footer button{border:0;background:none;padding:0 8px;font-size:12px}.stage-progress{position:absolute;bottom:0;left:var(--gutter);right:var(--gutter);height:1px;background:var(--line)}.stage-progress i{display:block;width:100%;height:100%;background:var(--silver);transform-origin:left;transform:scaleX(var(--progress,0))}.interlude{display:none}.enhanced .interlude{display:block;position:absolute;left:54%;right:var(--gutter);top:43%;transform:translateY(-30%);opacity:0;pointer-events:none}.interlude h2{font-size:clamp(38px,3.7vw,64px);font-weight:400;line-height:1.4;letter-spacing:-.035em;margin:0}.interlude>p:last-child{color:var(--muted);margin-top:28px;line-height:1.9}
.section{width:100%;max-width:none;margin:0;padding:130px max(var(--gutter),calc((100vw - 1440px)/2))}.section-heading{display:grid;grid-template-columns:1.1fr 1fr;gap:24px 60px;align-items:end}.section-heading .eyebrow{grid-column:1/-1;margin:0}.section-heading h2{font-size:clamp(36px,3.5vw,58px);font-weight:400;line-height:1.4;letter-spacing:-.04em;margin:0}.section-heading>p:last-child{margin:0 0 7px;color:var(--muted);justify-self:end;line-height:1.9}.workspace-frame{margin:64px 0 0}.workspace-frame img{display:block;width:100%;height:auto;aspect-ratio:2.1;object-fit:contain;background:var(--surface);border:1px solid var(--line);box-shadow:0 35px 90px #0006}.workspace-frame figcaption{display:flex;justify-content:space-between;gap:16px;margin-top:18px;font-size:12px;color:var(--muted)}.workflow{display:grid;grid-template-columns:1fr 1.2fr;gap:40px;margin-top:90px;padding-top:44px;border-top:1px solid var(--line)}.workflow h3,.lifetime h3{font-size:26px;font-weight:400;margin:0 0 18px}.workflow p:not(.eyebrow){max-width:560px;margin:0;color:var(--muted)}.text-link{display:inline-flex;align-items:center;gap:24px;min-height:44px;margin-top:20px;border-bottom:1px solid var(--line);font-size:14px}.text-link:hover{border-color:var(--silver)}
.start{padding-top:100px;border-top:1px solid var(--line)}.start-grid{display:grid;grid-template-columns:1fr 1fr;gap:9vw;align-items:center}.track-count>span{font-size:clamp(150px,22vw,330px);font-family:Arial,sans-serif;font-weight:300;line-height:1;letter-spacing:-.09em;display:block;color:var(--silver)}.track-count p{font-size:12px;color:var(--muted);letter-spacing:.12em;margin:20px 0}.start-copy h2{font-size:clamp(38px,4vw,64px);line-height:1.4;letter-spacing:-.04em;font-weight:400;margin:0}.start-copy>p{color:var(--muted);max-width:450px;margin:24px 0 30px}.primary{display:inline-flex;gap:44px;align-items:center;justify-content:space-between;min-height:52px;padding:12px 24px;background:var(--ink);color:var(--bg);border-radius:2px;font-size:14px;transition:background .2s}.primary:hover{background:var(--silver)}.start-copy small{display:block;font-size:12px;color:var(--muted);margin-top:18px}.lifetime{display:flex;justify-content:space-between;gap:50px;margin-top:100px;padding-top:44px;border-top:1px solid var(--line)}.lifetime .eyebrow{margin-bottom:20px}.lifetime>p{margin:0;color:var(--muted)}.footer{padding:40px var(--gutter);border-top:1px solid var(--line);display:flex;align-items:center;gap:35px;color:var(--muted);font-size:12px}.footer-brand{color:var(--ink);font-size:22px;letter-spacing:-.03em}.footer>a:last-child{margin-left:auto;min-height:44px;display:flex;align-items:center}
.mcp{border-bottom:1px solid var(--line)}.mcp-layout{display:grid;grid-template-columns:1fr 1.2fr;gap:70px;align-items:center}.mcp-word{font-size:clamp(70px,11vw,172px);letter-spacing:-.08em;font-weight:350;line-height:1;color:var(--silver)}.mcp-word span{display:block;font-size:12px;letter-spacing:.12em;margin-top:28px;color:var(--muted)}.mcp h2,.plugins h2{font-size:clamp(34px,3.5vw,58px);line-height:1.4;font-weight:400;letter-spacing:-.04em;margin:0 0 28px}.mcp-layout>div>p{color:var(--muted);max-width:560px}.mcp-scope{display:flex;justify-content:space-between;gap:24px;border-top:1px solid var(--line);padding-top:28px;margin-top:64px;color:var(--muted);font-size:14px}.plugins{padding-top:40px}.plugin-row{display:grid;grid-template-columns:1fr 1.2fr;gap:70px;border-top:1px solid var(--line);padding:54px 0}.plugin-row:first-of-type{margin-top:52px}.plugin-number{font:300 clamp(86px,9vw,140px)/1 Arial,sans-serif;letter-spacing:-.065em;color:var(--silver)}.plugin-number span{display:block;font:14px/1.7 'Microsoft YaHei UI',sans-serif;letter-spacing:.06em;margin-top:20px}.plugin-row h3{font-size:26px;font-weight:400;margin:0 0 20px}.plugin-row p{color:var(--muted);max-width:580px}.plugin-row small{display:block;font-size:12px;color:var(--muted)}.plugin-row summary{cursor:pointer;min-height:44px;padding:10px 0;font-size:14px}.plugin-row summary:focus-visible{outline:2px solid var(--ink);outline-offset:4px}.plugin-row details p{font-size:14px;line-height:2.1}
@media(max-width:700px){.mcp-layout,.plugin-row{grid-template-columns:1fr;gap:32px}.mcp-word{font-size:96px}.mcp-scope{display:grid;grid-template-columns:1fr 1fr;font-size:12px;margin-top:44px}.plugin-row{padding:36px 0}.plugin-number{font-size:90px}.plugin-row h3{font-size:24px}.plugins{padding-top:30px}}
@media(min-width:1600px){.hero-copy{top:48%}.hero-copy h1{font-size:76px}}
@media(max-width:1050px){.header nav{gap:24px}.section-heading{grid-template-columns:1fr}.section-heading>p:last-child{justify-self:start}.hero-copy{max-width:650px}.interlude h2{font-size:42px}.section{padding-top:90px;padding-bottom:90px}.start-grid{gap:50px}.stage-shade{background:linear-gradient(90deg,var(--bg),transparent 95%),linear-gradient(0deg,var(--bg),transparent 30%)}}
@media(max-width:700px){:root{--gutter:24px}.header{padding-top:18px}.brand{font-size:20px}.header nav a:not(:last-child){display:none}.header nav{font-size:12px}.stage,.enhanced .stage{height:100svh;min-height:700px}.enhanced .opening{height:240svh}.hero-copy{left:var(--gutter);right:var(--gutter);top:auto;bottom:135px;transform:none}.hero-copy h1{font-size:clamp(30px,7.4vw,49px);line-height:1.5;letter-spacing:-.055em}.hero-copy .eyebrow{font-size:12px;margin-bottom:22px}.intro{font-size:16px;margin-top:24px;margin-bottom:26px}.stage-shade{background:linear-gradient(0deg,var(--bg) 7%,#090b0dec 24%,#090b0d20 75%)}.stage-footer{bottom:18px}.stage-caption{display:none}.enhanced .interlude{left:var(--gutter);right:var(--gutter);top:auto;bottom:155px;transform:none}.interlude h2{font-size:38px}.section-heading h2{font-size:34px}.section-heading{gap:22px}.section-heading>p:last-child{font-size:16px}.section{padding-top:76px;padding-bottom:76px}.workspace-frame{margin-top:36px}.workspace-frame figcaption span:last-child{display:none}.workflow{grid-template-columns:1fr;gap:14px;margin-top:55px;padding-top:30px}.workflow>.eyebrow{margin-bottom:6px}.workflow h3,.lifetime h3{font-size:24px}.start-grid{grid-template-columns:1fr;gap:32px}.track-count>span{font-size:160px}.start-copy h2{font-size:38px}.lifetime{margin-top:64px;flex-direction:column;gap:10px}.footer{flex-wrap:wrap;gap:4px 24px}.footer>p{width:100%;order:3;margin:0}.footer>a:last-child{margin-left:auto}.start-copy>p{font-size:16px}}
.section[data-motion]{position:relative;isolation:isolate;overflow:hidden}.section-canvas{position:absolute;inset:0;width:100%;height:100%;z-index:-1;pointer-events:none}.section-heading,.mcp-layout,.plugin-row,.start-grid,.lifetime,.workflow{position:relative;z-index:1}.workspace-frame{position:relative;will-change:transform;transform:perspective(1600px) rotateX(var(--camera-angle,0deg)) translateY(var(--camera-y,0px));transform-origin:50% 70%}.footer{padding-bottom:85px}.reveal-ready{transition:opacity .7s var(--ease),translate .9s var(--ease)}.reveal-ready:not(.revealed){opacity:0;translate:0 24px}.motion-paused .workspace-frame{transform:none}.motion-paused .reveal-ready{transition:none;opacity:1;translate:none}
@media(max-width:700px){.workspace-frame{transform:translateY(var(--camera-y,0px))}.section-canvas{opacity:.8}}
.header{position:fixed;background:rgba(9,11,13,.94);border-bottom:1px solid var(--line);backdrop-filter:blur(16px);padding-block:16px}.header nav{gap:28px}
.voice{border-top:1px solid var(--line);min-height:780px}.voice-layout{display:grid;grid-template-columns:1.1fr 1fr;gap:80px;position:relative;z-index:1}.voice h2{font-size:clamp(34px,3.5vw,58px);font-weight:400;line-height:1.4;letter-spacing:-.04em;margin:0}.voice-caption{color:var(--muted);margin-top:30px;font-size:14px}.voice-copy>p{color:var(--muted);margin:0 0 24px;max-width:570px;line-height:1.9}.voice-process{display:flex;justify-content:space-between;gap:24px;margin-top:150px;padding-top:30px;border-top:1px solid var(--line);font-size:12px;color:var(--muted)}
.mobile-menu{display:none}.mobile-menu summary{list-style:none;cursor:pointer;min-height:44px;align-items:center;gap:14px;font-size:14px}.mobile-menu summary::-webkit-details-marker{display:none}.mobile-menu summary:focus-visible{outline:2px solid var(--ink);outline-offset:4px}
@media(max-width:1050px){.header nav{gap:18px;font-size:13px}.brand{font-size:20px}.voice-layout{gap:36px}}
@media(max-width:700px){.voice{min-height:0}.voice-layout{grid-template-columns:1fr;gap:30px}.voice-process{display:grid;grid-template-columns:1fr 1fr;margin-top:70px;gap:20px}.voice h2{font-size:34px}.header{padding-block:10px}}
@media(max-width:700px){.header>nav{display:none}.mobile-menu{display:block}.mobile-menu summary{display:flex}.header .mobile-menu nav{position:absolute;top:76px;left:24px;right:24px;display:flex;flex-direction:column;gap:0;align-items:stretch;padding:14px 20px;border:1px solid var(--line);background:var(--bg)}.header .mobile-menu nav a{display:flex;min-height:48px;font-size:15px;border-bottom:1px solid var(--line)}.header .mobile-menu nav a:last-child{border-bottom:0}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{transition:none!important;animation:none!important}.enhanced .opening{height:auto}.enhanced .stage{position:relative}.enhanced .interlude{display:none}.workspace-frame{transform:none}.reveal-ready{opacity:1!important;translate:none!important}}

/* One chapter, one feature. Full-height minimum; content may grow on mobile. */
.enhanced .opening{height:190svh}.stage,.enhanced .stage{position:sticky;top:0;height:100svh;min-height:640px}
.hero-copy .primary{margin-right:28px}.interlude,.stage-progress{display:none}
.section[data-motion]{min-height:100svh;display:flex;flex-direction:column;justify-content:center;padding-block:110px;border:0}
.section[data-motion]>.eyebrow{margin-bottom:54px}
.section-heading,.mcp-layout,.voice-layout,.plugin-row,.start-grid{flex-shrink:0}
.workspace-frame{margin-top:38px;width:min(100%,1100px);align-self:center}.workspace-frame img{border:0;box-shadow:none}
.workspace-frame figcaption{font-size:12px;color:var(--muted)}.workspace .section-heading h2{font-size:clamp(30px,3vw,48px)}.workspace-frame img{max-height:48svh;background:transparent}
.plugin-row,.plugin-row:first-of-type{border:0;margin:0;padding:0;align-items:center}
.narrative-screen h2{font-size:clamp(34px,3.5vw,58px);font-weight:400;line-height:1.4;letter-spacing:-.04em;margin:0}
.voice-process{border:0;margin-top:100px;padding:0}.header,.footer{border:0}.text-link{border:0;gap:16px}.text-link:hover{text-decoration:underline;text-underline-offset:8px}
.start-copy>.text-link{display:block}.stage-footer{bottom:72px}
@media(max-width:700px){.section[data-motion]{min-height:100svh;padding-block:110px 90px}.section[data-motion]>.eyebrow{margin-bottom:38px}.stage,.enhanced .stage{min-height:760px}.hero-copy{bottom:160px}.hero-copy .primary{margin:0 0 18px}.hero-copy .round-link{display:flex}.workspace-frame{margin-top:32px}.voice-process{margin-top:60px}.narrative-screen h2{font-size:34px}.stage-footer{bottom:76px}.plugin-row{gap:48px}}
/* Continuous full-bleed stage; the content gutter never constrains animation. */
.section[data-motion]{background:transparent}
.section-canvas{mask-image:linear-gradient(to bottom,transparent,black 14%,black 86%,transparent)}
.hero-copy{left:max(var(--gutter),calc((100vw - 1440px)/2));max-width:min(44vw,690px);will-change:translate,opacity}
.hero-copy h1{font-size:clamp(38px,3.65vw,64px)}.hero-copy .download-feedback{max-width:450px}
.stage-shade{background:linear-gradient(0deg,var(--bg),transparent 16%)}
.opening::after,.section[data-motion]::after{content:'';position:absolute;bottom:0;left:max(var(--gutter),calc((100vw - 1440px)/2));right:max(var(--gutter),calc((100vw - 1440px)/2));height:1px;background:linear-gradient(90deg,transparent,var(--line) 20%,var(--line) 80%,transparent);pointer-events:none}
.audio-tools-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:60px;margin-top:80px;position:relative;z-index:1}
.audio-tools-grid h3,.official-plugins-grid h3{font-size:25px;line-height:1.4;font-weight:400;margin:0 0 20px}
.audio-tools-grid p:not(.tool-index),.official-plugins-grid p{color:var(--muted);line-height:1.85;margin:0 0 18px}
.tool-index{font-size:12px;letter-spacing:.1em;color:var(--silver);margin:0 0 28px}
.audio-tools-grid small,.official-plugins-grid small{font-size:12px;color:var(--muted)}
.official-plugins-grid{display:grid;grid-template-columns:1fr 1fr;gap:120px;margin-top:48px;position:relative;z-index:1}
.official-plugins-grid .plugin-number{font-size:clamp(80px,8vw,120px);margin-bottom:32px}
.official-plugins-grid summary{cursor:pointer;min-height:44px;padding-block:10px;font-size:14px}
.official-plugins-grid details p{font-size:13px}.download-feedback{font-size:12px;line-height:1.7;color:var(--muted);min-height:20px}
.primary{border:0;cursor:pointer;font-family:inherit}.direct-text-button{background:transparent;border:0;color:var(--ink);padding:0}
@media(max-width:1050px){.audio-tools-grid{gap:30px;margin-top:50px}.official-plugins-grid{gap:60px}.hero-copy h1{font-size:clamp(30px,3.65vw,44px)}}
@media(max-width:700px){.enhanced .opening{height:auto}.stage,.enhanced .stage{position:relative;min-height:760px}.hero-copy{max-width:none;left:24px;right:24px}.hero-copy h1{font-size:clamp(30px,7.4vw,49px)}.audio-tools-grid,.official-plugins-grid{grid-template-columns:1fr;gap:44px}.audio-tools-grid{margin-top:44px}.official-plugins-grid article+article{padding-top:36px;border-top:1px solid var(--line)}.official-plugins-grid .plugin-number{font-size:90px;margin-bottom:24px}}
@media(prefers-reduced-motion:reduce){.enhanced .opening{height:auto}.enhanced .stage{position:relative}.hero-copy{will-change:auto}}
#sound{z-index:0;pointer-events:none}.stage-shade{z-index:1}#brand-layer{position:absolute;z-index:3;inset:0;width:100%;height:100%;opacity:0;transition:opacity 1.3s;pointer-events:none}.canvas-ready #brand-layer{opacity:1}

/* The product image is a fixed 1920×1080 contract. The current wider capture
   is preserved in full over a soft ambient copy; a future 16:9 replacement
   can overwrite the asset without changing markup or layout. */
.workspace-frame{width:min(100%,1280px);margin-top:clamp(38px,6vw,78px);isolation:isolate}
.workspace-frame::before{content:'';position:absolute;z-index:-1;inset:10% 4% -5%;background:radial-gradient(ellipse at center,rgba(184,197,199,.18),rgba(184,197,199,.045) 45%,transparent 72%);filter:blur(42px);pointer-events:none}
.workspace-screen{position:relative;aspect-ratio:16/9;overflow:hidden;background:var(--bg);box-shadow:0 45px 120px rgba(0,0,0,.62),0 12px 35px rgba(0,0,0,.32);isolation:isolate}
.workspace-screen::before{content:'';position:absolute;z-index:0;inset:-8%;background:url('./assets/roleai-studio-workspace-1920x1080.png') center/cover no-repeat;filter:blur(24px) brightness(.34) saturate(.7);transform:scale(1.1);opacity:.82}
.workspace-screen img{position:relative;z-index:1;display:block;width:100%;height:100%;max-height:none;aspect-ratio:16/9;object-fit:cover;background:transparent;border:0;box-shadow:none}
.workspace-screen::after{content:'';position:absolute;z-index:2;inset:0;pointer-events:none;box-shadow:inset 0 0 0 1px rgba(184,197,199,.16),inset 0 -90px 90px rgba(3,5,6,.16);background:linear-gradient(115deg,rgba(255,255,255,.055),transparent 17%,transparent 78%,rgba(184,197,199,.025))}
.workspace-frame figcaption{margin-top:20px;padding-inline:2px;letter-spacing:.02em}

/* Homepage legal footer: one fading boundary, open layout, no card shell. */
.footer.site-legal-footer{position:relative;display:block;padding:64px max(var(--gutter),calc((100vw - 1440px)/2)) 112px;color:var(--muted);border:0}
.footer.site-legal-footer::before{content:'';position:absolute;top:0;left:max(var(--gutter),calc((100vw - 1440px)/2));right:max(var(--gutter),calc((100vw - 1440px)/2));height:1px;background:linear-gradient(90deg,transparent,var(--line) 18%,var(--line) 82%,transparent)}
.footer-primary,.footer-compliance{display:flex;align-items:flex-end;justify-content:space-between;gap:32px 56px}
.footer-identity{display:grid;gap:8px}.footer-identity .footer-brand{font-size:24px;line-height:1.2;color:var(--ink);letter-spacing:-.035em}.footer-identity p,.footer-compliance p{margin:0}
.footer-nav,.compliance-links{display:flex;align-items:center;justify-content:flex-end;gap:4px 28px;flex-wrap:wrap}
.footer-nav a,.compliance-links a{display:inline-flex;align-items:center;min-height:44px;transition:color .2s}.footer-nav a{color:var(--ink);font-size:13px}.footer-nav a:hover,.compliance-links a:hover{color:var(--silver)}
.footer-compliance{align-items:center;margin-top:38px;padding-top:4px;font-size:12px;color:var(--muted)}
.public-security-filing{gap:7px}.public-security-filing img{width:14px;height:14px;opacity:.72}

@media(max-width:700px){.workspace-frame{margin-top:38px}.workspace-screen{box-shadow:0 24px 70px rgba(0,0,0,.58)}.workspace-screen::after{box-shadow:inset 0 0 0 1px rgba(184,197,199,.14),inset 0 -45px 50px rgba(3,5,6,.13)}.workspace-frame figcaption{align-items:flex-start;flex-direction:column;gap:4px}.workspace-frame figcaption span:last-child{display:block}.footer.site-legal-footer{padding:52px 24px 112px}.footer-primary,.footer-compliance{align-items:flex-start;flex-direction:column}.footer-nav,.compliance-links{justify-content:flex-start;gap:0 22px}.footer-compliance{margin-top:26px;gap:12px}.compliance-links a{min-height:38px}}