:root{color-scheme:dark;--bg:#08090b;--surface:#111419;--surface-2:#171a1e;--ink:#f1f2f3;--muted:#a4a8ad;--quiet:#747a82;--blue:#8eb6ed;--amber:#d9ae79;--gutter:clamp(22px,5vw,72px);--content:min(1120px,calc(100vw - 48px));--face:'General Sans','Noto Sans SC','Microsoft YaHei',sans-serif;--ease:cubic-bezier(.2,.75,.25,1);font-family:var(--face);font-synthesis:none;text-rendering:optimizeLegibility}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:18px;scrollbar-gutter:stable}body{margin:0;background:var(--bg);color:var(--ink);font:400 16px/1.65 var(--face);letter-spacing:.005em}a{color:inherit;text-decoration:none;text-underline-offset:.22em}button,input,textarea,select{font:inherit}button,a,summary,input,textarea{touch-action:manipulation}button{cursor:pointer}a:focus-visible,button:focus-visible,summary:focus-visible,input:focus-visible,textarea:focus-visible{outline:2px solid var(--blue);outline-offset:4px}[hidden]{display:none!important}.visually-hidden{position:absolute!important;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.topbar{position:absolute;z-index:8;top:0;left:50%;transform:translateX(-50%);display:flex;align-items:center;justify-content:space-between;width:var(--content);height:78px}.brand{display:flex;align-items:center;gap:10px;font-size:18px;font-weight:600;letter-spacing:.01em}.brand img{display:block;width:30px;height:30px;object-fit:contain}.main-nav{display:flex;align-items:center;gap:clamp(20px,3.2vw,44px);margin-left:auto;margin-right:38px;color:#c3c6ca;font-size:14px}.main-nav a,.hero-secondary,.secondary-link,.footer-meta a{transition:color .2s ease}.main-nav a:hover,.hero-secondary:hover,.secondary-link:hover,.footer-meta a:hover{color:var(--blue)}.top-download{display:inline-flex;align-items:center;justify-content:center;min-height:42px;padding:0 16px;border-radius:999px;background:#e7e8e9;color:#111318;font-size:14px;font-weight:600;transition:background .2s ease,transform .2s ease}.top-download:hover,.hero-primary:hover,.story-cta:hover{background:#cddcf0;transform:translateY(-2px)}
.story{position:relative;height:270svh;min-height:1680px;background:#08090b}.story-pin{position:sticky;top:0;height:100svh;min-height:620px;overflow:hidden;isolation:isolate;background:#08090b}.story-scene{position:absolute;z-index:0;inset:0;overflow:hidden;background:#08090b}.story-scene iframe,.story-fallback{position:absolute;inset:0;width:100%;height:100%;border:0}.story-fallback{z-index:2;object-fit:cover;object-position:center 52%;opacity:1;transition:opacity .4s ease}.story-scene.ready .story-fallback{opacity:0}.story-scene.static .story-fallback{opacity:1}.story-scene.static iframe{visibility:hidden}.story-scene iframe{z-index:1;pointer-events:none}.story-pin::after{position:absolute;z-index:2;inset:0;content:"";background:linear-gradient(90deg,rgba(8,9,11,.94) 0%,rgba(8,9,11,.78) 28%,rgba(8,9,11,.28) 48%,transparent 70%);pointer-events:none}.story-copy{position:absolute;z-index:4;left:max(24px,calc((100vw - 1120px)/2));top:50%;width:min(430px,37vw);transform:translateY(-50%);color:var(--ink)}.story-copy h1{max-width:8em;margin:0;font-size:clamp(42px,4.15vw,60px);font-weight:600;line-height:1.08;letter-spacing:-.025em;text-wrap:balance}.hero-description{max-width:36ch;margin:20px 0 0;color:#d2d4d7;font-size:18px;line-height:1.62;text-wrap:pretty}.hero-downloads{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin-top:28px;max-width:420px}.hero-download{display:flex;min-height:60px;flex-direction:column;align-items:flex-start;justify-content:center;gap:2px;padding:10px 16px;border-radius:12px;background:#e7e8e9;color:#17191c;transition:background .2s ease,transform .2s ease}.hero-download:hover{background:#cddcf0;transform:translateY(-2px)}.hero-download strong{font-size:15px;font-weight:600;line-height:1.3}.hero-download small{font-size:13px;line-height:1.3;color:#555a60}.hero-note{margin:12px 0 0;color:#b9bdc1;font-size:14px;line-height:1.5}.story-copy h2{max-width:10em;margin:34px 0 0;font-size:clamp(24px,2.05vw,30px);font-weight:500;line-height:1.18;letter-spacing:-.015em}.story-description{max-width:36ch;margin:10px 0 14px;color:var(--muted);font-size:15px;line-height:1.6}.story-cta{display:inline-flex;min-height:42px;align-items:center;justify-content:center;padding:0 15px;border-radius:9px;background:#15181c;color:#f3f4f5;font-size:14px;font-weight:600;transition:background .2s ease,transform .2s ease}.story-readout{position:absolute;z-index:5;right:max(24px,calc((100vw - 1120px)/2));bottom:26px;display:flex;align-items:baseline;gap:12px;max-width:calc(100% - 48px);color:#f1f2f3;font-size:14px}.readout-label{color:#c1c4c8}.story-readout>span:nth-child(2){color:#c1c4c8}.story-readout strong{font-size:clamp(24px,2.7vw,38px);font-weight:500;line-height:1;font-variant-numeric:tabular-nums;letter-spacing:-.04em}.story-progress{position:absolute;z-index:6;left:0;right:0;bottom:0;height:3px;background:#292c30}.story-progress span{display:block;width:0;height:100%;background:var(--blue);transition:width .06s linear}
.chapter{position:relative;width:100%;padding-inline:max(24px,calc((100vw - 1120px)/2));background:var(--bg)}.concepts{padding-block:clamp(90px,12vw,160px) clamp(96px,12vw,170px)}.concepts-heading{display:grid;grid-template-columns:5fr 7fr;align-items:end;gap:28px;margin-bottom:52px}.concepts-heading h2,.downloads-lead h2,.contact-lead h2{margin:0;font-size:clamp(38px,5.1vw,68px);font-weight:550;line-height:1.08;letter-spacing:-.025em;text-wrap:balance}.concepts-heading p{max-width:36ch;margin:0 0 6px;color:var(--muted);font-size:18px;line-height:1.6}.concept-gallery{display:grid;grid-template-columns:1.15fr .85fr;grid-template-rows:auto auto;gap:24px}.concept{position:relative;min-width:0;margin:0;overflow:hidden;background:#101216}.concept img{display:block;width:100%;height:100%;min-height:280px;object-fit:cover;transition:transform .6s var(--ease)}.concept:hover img{transform:scale(1.025)}.concept-heat{grid-row:span 2;min-height:560px}.concept-earth,.concept-water{min-height:268px}.concept figcaption{position:absolute;right:0;bottom:0;left:0;display:flex;align-items:end;justify-content:space-between;gap:20px;padding:20px 22px;background:linear-gradient(0deg,rgba(5,6,8,.94),rgba(5,6,8,.55) 68%,transparent);color:#f3f4f5}.concept figcaption strong{font-size:21px;font-weight:550}.concept figcaption span{color:#d3d5d8;font-size:13px;text-align:right}.course-art{display:block;overflow:hidden;background:#191d22}.course-art img{display:block;width:100%;height:auto;aspect-ratio:3/2;object-fit:contain;transition:transform .45s var(--ease)}.course-art:hover img{transform:scale(1.025)}
.downloads{display:grid;grid-template-columns:4fr 8fr;gap:clamp(32px,6vw,84px);align-items:start;padding-block:clamp(100px,13vw,170px);background:#08090b;color:var(--ink)}.downloads-lead{position:sticky;top:28px}.downloads-lead h2{font-size:clamp(40px,5.1vw,68px)}.downloads-lead p{max-width:32ch;margin:20px 0 0;color:#b4b8bd;font-size:17px;line-height:1.65}
.contact{display:grid;grid-template-columns:5fr 7fr;column-gap:32px;row-gap:56px;align-items:start;padding-block:clamp(96px,12vw,150px);background:#101216}.contact-lead h2{font-size:clamp(40px,5.1vw,68px)}.contact-lead p{max-width:34ch;margin:22px 0 0;color:#c2c5c9;font-size:18px;line-height:1.65}.contact-details{display:grid;grid-template-columns:minmax(110px,180px) 1fr;gap:clamp(20px,3vw,38px);align-items:start}.qr{margin:0;max-width:180px}.qr img{display:block;width:100%;height:auto;aspect-ratio:1;object-fit:contain;background:#f2f3f4}.qr figcaption{margin-top:10px;color:#c0c3c7;font-size:14px}.contact-copy>p{max-width:34ch;margin:0 0 24px;color:#d3d5d8;font-size:17px;line-height:1.65}.wechat-line{display:flex;flex-wrap:wrap;gap:14px;align-items:center}.wechat-line strong{font-size:clamp(20px,2vw,26px);font-weight:550}.wechat-line button,.suggestion-submit button,.promotion button{min-height:42px;padding:0 14px;border:0;background:#e7e8e9;color:#111317;font-size:14px;font-weight:600;transition:background .2s ease,transform .2s ease}.wechat-line button:hover,.suggestion-submit button:hover,.promotion button:hover{background:#cddcf0;transform:translateY(-2px)}#copy-status{display:block;margin-top:14px;color:#b9bdc2;font-size:14px}.secondary-entry{grid-column:1/-1;padding-top:14px}.secondary-entry>summary,.suggestion-details>summary{cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:24px;min-height:50px;padding:8px 0;color:#e8eaec;font-size:17px;font-weight:550;list-style:none}.secondary-entry>summary::-webkit-details-marker,.suggestion-details>summary::-webkit-details-marker{display:none}.secondary-entry>summary::after,.suggestion-details>summary::after{content:'+';font-size:26px;font-weight:400;line-height:1;transition:transform .22s ease}.secondary-entry[open]>summary::after,.suggestion-details[open]>summary::after{transform:rotate(45deg)}.secondary-links{display:grid;grid-template-columns:1.7fr 1fr 1fr;gap:24px;margin-top:10px;padding-top:14px}.secondary-link{align-self:start;color:#cbd0d5;font-size:16px;font-weight:550;text-decoration:underline;text-underline-offset:4px}.suggestion-details{grid-column:1/-1}.suggestion-details form{margin-top:16px;padding:24px;background:#171a1e;color:#e9eaec}.suggestion-fields{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.suggestion-fields label{display:grid;gap:7px;font-size:14px;font-weight:550}.suggestion-fields input,.suggestion-fields textarea,.promotion input{width:100%;min-height:44px;padding:10px 12px;border:1px solid #3a3e43;background:#0c0e11;color:#f1f2f3;font-size:16px}.suggestion-fields textarea{min-height:110px;resize:vertical}.suggestion-description{grid-column:1/-1}.suggestion-submit{display:flex;flex-wrap:wrap;gap:18px;align-items:center;margin-top:18px}.suggestion-submit button{min-width:132px}#suggestion-status{font-size:14px;line-height:1.45}.promotion{grid-column:1/-1;padding:8px 0;color:#e7e9eb;font-size:15px}.promotion>summary{cursor:pointer;display:flex;align-items:center;justify-content:space-between;min-height:50px;font-size:17px;font-weight:550;list-style:none}.promotion>summary::-webkit-details-marker{display:none}.promotion>summary::after{content:'+';font-size:26px;font-weight:400;transition:transform .22s ease}.promotion[open]>summary::after{transform:rotate(45deg)}.promotion-content{padding:10px 0 0}.promotion h3{margin:0;font-size:22px}.promotion p{max-width:60ch;color:#c0c4c8}.promotion form,.promotion-panel{margin-top:16px}.promotion input{max-width:360px;margin:8px 12px 8px 0}.promotion button{margin:8px 12px 8px 0}.footer{display:grid;grid-template-columns:1fr 1fr;gap:24px;align-items:end;padding:clamp(55px,8vw,100px) max(24px,calc((100vw - 1120px)/2));background:#08090b;color:var(--ink)}.footer-mark{display:inline-block;width:max-content;font-size:clamp(28px,3vw,36px);font-weight:600;line-height:1.1;letter-spacing:.01em}.footer-meta{justify-self:end;max-width:460px}.footer-meta p{margin:0 0 12px;font-size:17px}.footer-meta small{color:#aeb3b8;font-size:13px;line-height:1.7}.footer-meta small a{text-decoration:underline;text-underline-offset:3px}
@media(max-width:900px){.story-copy{width:min(420px,44vw)}.concepts-heading{grid-template-columns:1fr 1fr}.downloads{grid-template-columns:1fr 1.4fr}.contact{grid-template-columns:1fr 1.25fr}}
@media(max-width:620px){:root{--content:calc(100vw - 40px)}.topbar{height:64px}.brand{font-size:17px}.brand img{width:28px;height:28px}.main-nav{display:none}.top-download{min-height:40px;padding:0 13px;font-size:13px}.story{height:300svh;min-height:1980px}.story-pin{height:100svh;min-height:720px}.story-pin::after{background:linear-gradient(180deg,rgba(8,9,11,.05) 16%,rgba(8,9,11,.12) 44%,rgba(8,9,11,.82) 65%,#08090b 91%)}.story-copy{top:auto;bottom:72px;left:20px;right:20px;width:auto;max-width:440px;transform:none}.story-copy h1{max-width:7.5em;font-size:clamp(38px,10vw,48px);line-height:1.04}.hero-description{max-width:34ch;margin-top:12px;font-size:16px;line-height:1.5}.hero-downloads{gap:9px;margin-top:17px}.hero-download{min-height:52px;padding:8px 10px;border-radius:8px}.hero-download strong{font-size:14px}.hero-download small{font-size:12px}.hero-note{margin-top:8px;font-size:13px}.story-copy h2,.story-description,.story-cta{display:none}.story-readout{right:20px;bottom:22px;gap:8px;max-width:48%;font-size:13px}.readout-label{display:none}.story-readout>span:nth-child(2){font-size:12px}.story-readout strong{font-size:24px}.story-progress{height:3px}.chapter{padding-inline:20px}.concepts{padding-block:84px 92px}.concepts-heading{grid-template-columns:1fr;gap:14px;margin-bottom:34px}.concepts-heading h2,.downloads-lead h2,.contact-lead h2{font-size:clamp(38px,10vw,48px)}.concepts-heading p{font-size:16px}.concept-gallery{grid-template-columns:1fr;gap:18px}.concept-heat,.concept-earth,.concept-water{grid-row:auto;min-height:0}.concept img{min-height:0;aspect-ratio:4/3}.concept figcaption{padding:14px 15px}.concept figcaption strong{font-size:18px}.concept figcaption span{max-width:53%;font-size:12px}.downloads{grid-template-columns:1fr;gap:26px;padding-block:82px 90px}.downloads-lead{position:static}.downloads-lead h2{max-width:9ch}.downloads-lead p{margin-top:14px;font-size:16px}.contact{grid-template-columns:1fr;row-gap:30px;padding-block:82px 84px}.contact-lead h2{font-size:clamp(40px,11vw,52px)}.contact-lead p{margin-top:14px;font-size:16px}.contact-details{grid-template-columns:84px 1fr;gap:16px}.qr{max-width:84px}.qr figcaption{font-size:12px}.contact-copy>p{margin-bottom:16px;font-size:15px}.wechat-line{gap:9px}.wechat-line strong{font-size:17px}.wechat-line button{min-height:42px;padding-inline:11px}#copy-status{font-size:13px}.secondary-entry{padding-top:8px}.secondary-links{grid-template-columns:1fr;gap:18px;padding-top:12px}.suggestion-fields{grid-template-columns:1fr}.suggestion-description{grid-column:auto}.suggestion-details form{padding:18px}.footer{grid-template-columns:1fr;gap:26px;padding-block:46px 38px}.footer-mark{font-size:clamp(60px,18vw,90px)}.footer-meta{justify-self:start}}
@media(max-width:360px){:root{--content:calc(100vw - 34px)}.topbar{width:var(--content)}.story-copy{left:17px;right:17px}.story-copy h1{font-size:38px}.hero-description{font-size:15px}.hero-download{min-height:50px;padding:7px 8px}.hero-download strong{font-size:13px}.hero-download small{font-size:12px}.hero-note{font-size:12px}.contact-details{grid-template-columns:76px 1fr;gap:14px}.qr{max-width:76px}.wechat-line{align-items:flex-start;flex-direction:column}}
@media(max-height:520px) and (min-width:621px){.story{height:290svh;min-height:0}.story-pin{min-height:0}.story-copy{top:54%;width:35vw}.story-copy h1{font-size:clamp(36px,4vw,48px)}.hero-description{font-size:15px}.story-copy h2{font-size:22px;margin-top:18px}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{scroll-behavior:auto!important;animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}}
.story-fallback-note{position:absolute;z-index:3;right:24px;bottom:35px;color:#d9dde1;font-size:13px}.story-scene.ready .story-fallback-note{display:none}.story-scene.static .story-fallback-note{color:#f1f2f3}.course-plain-art{display:flex;aspect-ratio:3/2;align-items:flex-end;padding:24px;background:#171a1e;color:#e5e8ea;font-size:clamp(26px,3.4vw,42px);font-weight:500;line-height:1.12;letter-spacing:-.025em;transition:color .25s ease,background .25s ease}.course-plain-art:hover{background:#20252a;color:#fff}
@media(max-width:620px){.story-fallback-note{right:15px;bottom:38px;font-size:12px}.course-plain-art{padding:18px;font-size:30px}}

/* v3 editorial masthead + live specimen: reference alignment overrides */
:root{--content:min(72vw,1040px)}
.story-scene iframe{left:32%;right:auto;width:68%}
.story-pin::after{display:block;background:linear-gradient(90deg,#08090b 0%,rgba(8,9,11,.96) 24%,rgba(8,9,11,.62) 39%,rgba(8,9,11,.18) 52%,transparent 61%)}
.story-copy{width:min(360px,33vw)}
.story-copy h1{font-size:clamp(42px,3.65vw,54px);line-height:1.08}
.hero-description{max-width:34ch;margin-top:17px;font-size:17px;line-height:1.58}
.hero-downloads{gap:9px;margin-top:20px;max-width:360px}
.hero-download{min-height:48px;padding:8px 13px;border-radius:10px}
.hero-download strong{font-size:14px}
.hero-download small{font-size:13px}
.hero-note{margin-top:9px;font-size:14px}
.story-copy h2,.story-description,.story-cta{display:none}
.concepts-heading h2,.downloads-lead h2,.contact-lead h2{font-size:clamp(32px,3.4vw,48px);line-height:1.12}
.concept-gallery{grid-template-columns:1.08fr .92fr;grid-template-rows:auto;gap:clamp(22px,4vw,56px);align-items:start}
.concept-heat,.concept-earth,.concept-water{grid-row:auto;min-height:0}
.concept-water{margin-top:clamp(80px,12vw,160px)}
.concept img{height:auto;min-height:0;aspect-ratio:3/2;object-fit:contain;background:#08090b}
.concept figcaption{background:linear-gradient(0deg,rgba(5,6,8,.94),rgba(5,6,8,.58) 64%,transparent)}
@media(max-width:900px) and (min-width:621px){:root{--content:calc(84vw)}.story-scene iframe{left:32%;width:68%}.story-copy{width:min(360px,36vw)}}
@media(max-width:620px){:root{--content:calc(100vw - 40px)}.story-scene iframe{left:0;width:100%}.story-pin::after{display:block;background:linear-gradient(180deg,rgba(8,9,11,.02) 16%,rgba(8,9,11,.16) 45%,rgba(8,9,11,.86) 67%,#08090b 93%)}.story-copy{width:auto}.story-copy h1{font-size:clamp(38px,10vw,48px)}.hero-description{font-size:16px}.hero-downloads{max-width:none;margin-top:16px}.hero-download{min-height:46px;padding-inline:10px}.hero-download strong{font-size:13px}.hero-download small{font-size:13px}.story-copy h2,.story-description,.story-cta{display:none}.concepts-heading h2,.downloads-lead h2,.contact-lead h2{font-size:clamp(32px,8.8vw,36px)}.concept-gallery{grid-template-columns:1fr;gap:24px}.concept-water{margin-top:0}.concept img{aspect-ratio:3/2;object-fit:contain}.concept figcaption{padding:14px}.concept figcaption span{max-width:58%;font-size:13px}}
@media(max-width:360px){:root{--content:calc(100vw - 34px)}.story-copy h1{font-size:38px}.hero-description{font-size:15px}.hero-download{padding-inline:8px}.hero-download strong,.hero-download small{font-size:13px}}
@media(min-width:901px){.story-copy{left:max(24px,calc((100vw - var(--content))/2))}}

/* Compact experiment masthead with real course links below the pinned specimen. */
@media(min-width:621px){
  .story-scene{inset:0 0 auto;height:clamp(500px,68svh,620px)}
  .story-copy{top:calc(clamp(500px,68svh,620px) / 2)}
  .story-readout{bottom:auto;top:calc(clamp(500px,68svh,620px) - 48px)}
  .story-progress{bottom:auto;top:clamp(500px,68svh,620px)}
  .story-course-strip{position:absolute;z-index:4;top:clamp(500px,68svh,620px);right:max(24px,calc((100vw - var(--content))/2));bottom:0;left:max(24px,calc((100vw - var(--content))/2));display:flex;align-items:center;justify-content:flex-end;gap:clamp(18px,3vw,42px);min-height:0;color:#e8eaed}
  .story-course-strip>span{margin-right:auto;color:#aeb3b9;font-size:14px;letter-spacing:.02em}
  .story-course-strip>a{display:inline-flex;align-items:center;gap:9px;min-height:48px;color:#e8eaed;font-size:16px;letter-spacing:.015em;transition:color .2s ease}
  .story-course-strip>a:hover{color:#a9c9f1}
  .story-course-strip>a span{color:#858c94;font-size:14px}
}
@media(max-width:620px){.story-course-strip{display:none}}
@media(min-width:621px){
  .story-course-strip{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));grid-template-rows:auto 1fr;align-content:center;align-items:stretch;justify-content:initial;gap:10px 16px;padding-block:14px 20px}
  .story-course-label{grid-column:1/-1;color:#aeb3b9;font-size:14px;letter-spacing:.02em}
  .story-course-strip>a.story-course-card{display:grid;grid-template-rows:120px 60px;align-self:start;height:180px;min-width:0;overflow:hidden;align-content:start;border-radius:18px;background:#111419;color:#f1f2f3}
  .story-course-card>img{display:block;width:100%;height:120px;object-fit:cover;opacity:.88;transition:opacity .2s ease,transform .35s var(--ease)}
  .story-course-card:hover>img{opacity:1;transform:scale(1.03)}
  .story-course-card>span{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:10px 14px}
  .story-course-card strong{font-size:15px;font-weight:550;letter-spacing:.015em}
  .story-course-card small{color:#aeb3b9;font-size:13px;white-space:nowrap}
}

/* Reduced-motion and low-power fallback is a single, fitted product poster. */
.story.static{height:auto;min-height:0}
.story.static .story-pin{position:relative;top:auto;height:clamp(760px,100svh,900px);min-height:760px}
.story.static .story-scene{inset:0 0 auto;height:clamp(500px,68svh,620px)}
.story.static .story-fallback{inset:0 0 0 32%;width:68%;height:100%;object-fit:contain;object-position:center;background:#08090b;opacity:1}
.story.static .story-course-strip{display:grid}
@media(max-width:620px){
  .story.static .story-pin{height:clamp(780px,100svh,920px);min-height:780px}
  .story.static .story-scene{inset:0 0 auto;height:min(45svh,390px)}
  .story.static .story-fallback{inset:0;width:100%;height:100%;object-fit:contain;object-position:center top}
  .story.static .story-course-strip{display:none}
}

@media(max-width:620px){.footer-mark{font-size:clamp(28px,9vw,36px)}}
@media(max-height:520px) and (min-width:621px){
  .story-scene{height:100svh!important}
  .story-copy{top:78px!important;width:min(340px,40vw)!important;transform:none!important}
  .story-copy h1{font-size:clamp(32px,3.6vw,36px)!important;line-height:1.08!important}
  .hero-description{margin-top:8px!important;font-size:14px!important;line-height:1.4!important}
  .hero-downloads{gap:8px!important;margin-top:10px!important}
  .hero-download{min-height:44px!important;padding:6px 9px!important}
  .hero-download strong,.hero-download small{font-size:13px!important}
  .hero-note{margin-top:6px!important;font-size:13px!important;line-height:1.35!important}
  .story-readout{top:auto!important;bottom:14px!important}
  .story-progress{top:auto!important;bottom:0!important}
  .story-course-strip{display:none!important}
}

/* Reference-guided large specimen stage: retain a quiet copy column while the live apparatus fills the right field. */
@media(min-width:621px) and (min-height:521px){
  .story-scene{inset:0 0 auto;height:100svh}
  .story-scene iframe{left:35%;right:auto;width:65%;height:100%}
  .story-copy{top:17svh;left:max(24px,calc((100vw - var(--content))/2));width:min(360px,34vw);transform:none}
  .story-copy h1{font-size:clamp(42px,3.65vw,54px)}
  .story-pin::after{background:linear-gradient(90deg,#08090b 0%,#08090b 34%,rgba(8,9,11,.82) 38%,rgba(8,9,11,.4) 42%,transparent 47%)}
  .story-readout{top:auto;right:max(24px,calc((100vw - var(--content))/2));bottom:26px}
  .story-progress{top:auto;bottom:0}
  .story-course-strip{display:none!important}
  .story.static .story-scene{height:100svh}
  .story.static .story-fallback{inset:0 0 0 35%;width:65%;height:100%;object-fit:contain;object-position:center;background:#08090b;opacity:1}
}

/* Large-cover revision from the supplied reference: the apparatus owns the right field and the copy starts lower-left. */
.brand img{border-radius:22%}
@media(min-width:621px) and (min-height:521px){
  .story-scene{height:100svh}
  .story-scene iframe{left:35%;width:65%;height:100%}
  .story-poster{position:absolute;z-index:2;inset:0 0 0 35%;display:block;width:65%;height:100%;background:#08090b}
  .story-poster .story-fallback{inset:0;width:100%;height:100%;object-fit:contain;object-position:center;background:#08090b}
  .story-copy{top:26svh;left:15.5vw;width:min(34vw,640px);transform:none}
  .story-copy h1{font-size:clamp(44px,3.9vw,68px);line-height:1.1}
  .hero-description{max-width:37ch;margin-top:18px;font-size:clamp(16px,1.15vw,19px);line-height:1.65}
  .hero-downloads{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;margin-top:clamp(28px,5vh,56px);max-width:560px}
  .hero-download{min-height:50px;padding:8px 13px;border-radius:12px}
  .hero-download strong{font-size:14px}.hero-download small{font-size:13px}
  .hero-note{margin-top:10px;font-size:13px;line-height:1.45}
  .story-pin::after{background:linear-gradient(90deg,#08090b 0%,rgba(8,9,11,.99) 22%,rgba(8,9,11,.92) 32%,rgba(8,9,11,.66) 39%,rgba(8,9,11,.18) 48%,transparent 57%)}
  .story-readout{right:6vw;bottom:26px}
  .story.static .story-scene{height:100svh}
  .story.static .story-poster{opacity:1}
}
.story-scene.camera-reset iframe{visibility:hidden}
.story-poster{position:absolute;inset:0;display:block;width:100%;height:100%}
.story-scene .story-poster{transition:opacity .25s ease}
.story-scene.ready .story-poster{opacity:0;pointer-events:none}
.story-scene.static .story-poster{opacity:1}
.story-scene.camera-reset .story-poster{opacity:1}
@media(min-width:621px) and (min-height:521px){.story-poster{inset:0 0 0 35%;width:65%;height:100%}}
@media(max-width:620px){.brand img{border-radius:22%}}

/* Current fixed public homepage demo: full-bleed canvas and matching real-scene poster. */
.story-scene{inset:0!important;width:100%!important;height:100%!important;overflow:hidden!important;background:#08090b!important}
.story-scene iframe{inset:0!important;left:0!important;right:0!important;width:100%!important;height:100%!important}
.story-poster{inset:0!important;width:100%!important;height:100%!important;background:#08090b!important}
.story-poster .story-fallback{inset:0!important;width:100%!important;height:100%!important;object-fit:cover!important;object-position:center!important;background:#08090b!important}
.story-fallback-note{display:none!important}
.story-pin::after{background:linear-gradient(90deg,rgba(8,9,11,.94) 0%,rgba(8,9,11,.86) 21%,rgba(8,9,11,.59) 34%,rgba(8,9,11,.18) 49%,transparent 64%)!important}
.story-readout{top:auto!important;bottom:30px!important}
.story-progress{top:auto!important;bottom:0!important}
.story-course-strip{display:none!important}
.story.static{height:auto!important;min-height:0!important}
.story.static .story-pin{position:relative!important;top:auto!important;height:100svh!important;min-height:580px!important}
.story.static .story-scene{inset:0!important;height:100%!important}
.story.static .story-poster .story-fallback{object-fit:cover!important}
.story.static .story-course-strip{display:none!important}
@media(min-width:621px){.story-copy{top:26svh!important;left:15.5vw!important;width:min(34vw,640px)!important;transform:none!important}.story-pin::after{background:linear-gradient(90deg,#08090b 0%,rgba(8,9,11,.99) 22%,rgba(8,9,11,.88) 33%,rgba(8,9,11,.54) 44%,rgba(8,9,11,.16) 57%,transparent 70%)!important}.story-readout{right:6vw!important;bottom:30px!important}.story-progress{bottom:0!important}.story.static .story-fallback{object-fit:cover!important}}
@media(max-width:620px){.story-pin{height:100svh!important;min-height:680px!important}.story-copy{top:auto!important;bottom:64px!important;left:20px!important;right:20px!important;width:auto!important;transform:none!important}.story-copy h1{font-size:clamp(38px,10vw,48px)!important}.hero-description{font-size:15px!important;line-height:1.48!important}.hero-downloads{grid-template-columns:repeat(2,minmax(0,1fr))!important;gap:8px!important;margin-top:14px!important}.hero-download{min-height:46px!important;padding:7px 9px!important}.hero-download strong,.hero-download small{font-size:12px!important}.hero-note{font-size:12px!important}.story-pin::after{background:linear-gradient(180deg,rgba(8,9,11,.08) 0%,rgba(8,9,11,.14) 42%,rgba(8,9,11,.84) 67%,#08090b 94%)!important}.story-readout{right:18px!important;bottom:22px!important;max-width:60%!important}.story.static .story-pin{height:100svh!important;min-height:680px!important}.story.static .story-scene{inset:0!important;height:100%!important}.story.static .story-poster .story-fallback{object-fit:cover!important}}
@media(max-height:520px) and (min-width:621px){.story-copy{top:78px!important}.story-readout{bottom:18px!important}}
@media(max-height:520px) and (min-width:621px){.story{height:270svh!important;min-height:0!important}.story-pin{height:100svh!important;min-height:0!important}.story-scene,.story-scene iframe,.story-poster{height:100svh!important}.story-copy{top:64px!important;width:min(340px,40vw)!important}.story-copy h1{font-size:clamp(30px,3.6vw,36px)!important;line-height:1.08!important}.hero-description{max-width:39ch!important;margin-top:8px!important;font-size:14px!important;line-height:1.38!important}.hero-downloads{gap:8px!important;margin-top:10px!important}.hero-download{min-height:44px!important;padding:6px 9px!important}.hero-download strong,.hero-download small{font-size:13px!important}.hero-note{margin-top:6px!important;font-size:12px!important;line-height:1.32!important}.story-readout{bottom:16px!important}}
@media(min-width:621px){.story[data-hero="papermaking"] .story-scene iframe{left:35%!important;width:65%!important}.story[data-hero="papermaking"] .story-poster{inset:0 0 0 35%!important;width:65%!important}.story[data-hero="papermaking"] .story-pin::after{background:linear-gradient(90deg,#08090b 0%,#08090b 34%,rgba(8,9,11,.82) 38%,rgba(8,9,11,.4) 42%,transparent 53%)!important}}

/* Compact subject rail, honest course list, and a single uncropped cutout stage. */
.subject-showcase{grid-template-columns:minmax(280px, .4fr) minmax(0, .6fr)!important;gap:clamp(20px,3vw,46px)!important;min-height:440px!important;align-items:stretch!important}
.subject-course-column{position:relative;z-index:3;display:flex;flex-direction:column;gap:26px;min-width:0}
.subject-options{display:flex!important;flex-direction:column;gap:8px!important}
.subject-option{position:relative;z-index:3;display:grid!important;grid-template-columns:76px minmax(0,1fr);gap:13px!important;align-items:center!important;min-height:76px!important;padding:8px!important;border-radius:13px!important;text-align:left!important;pointer-events:auto!important}
.subject-option>img{display:block;width:76px;height:54px;object-fit:cover;border-radius:7px;pointer-events:none}
.subject-option-copy{display:flex;min-width:0;flex-direction:column;gap:4px}
.subject-option-copy strong{font-size:15px;font-weight:550;line-height:1.3}
.subject-option-copy small{color:#aeb2b7;font-size:12px;line-height:1.35}
.subject-feature-copy{position:static!important;z-index:auto!important;width:auto!important;margin-top:0!important;padding:4px 2px 0!important;pointer-events:auto!important}
.subject-feature-copy h3{margin:5px 0 3px!important;font-size:22px!important}
.subject-feature-copy p{margin:0!important;color:#c2c4c9;font-size:14px!important;line-height:1.5!important}
.subject-feature-copy a,.subject-feature-copy .subject-unavailable{margin-top:8px!important}
.subject-feature{position:relative;z-index:1;min-width:0;min-height:440px!important;height:100%;overflow:visible!important}
.subject-feature-media{position:absolute;inset:0;overflow:visible;pointer-events:none}
.subject-feature-image{position:absolute!important;z-index:1;top:-18%!important;right:-6%!important;width:115%!important;height:125%!important;object-fit:contain!important;object-position:center top!important;filter:drop-shadow(0 18px 25px rgba(0,0,0,.35))!important;pointer-events:none!important}
.subject-feature-support{position:absolute;z-index:0;left:5%!important;right:2%!important;bottom:1%!important;height:34%!important;border:0!important;border-radius:50% 50% 8px 8px!important;background:radial-gradient(ellipse at 50% 10%,rgba(82,91,103,.28),rgba(30,33,38,.2) 44%,rgba(8,9,11,0) 78%)!important;box-shadow:none!important;pointer-events:none!important}
@media(max-width:900px) and (min-width:621px){.subject-showcase{grid-template-columns:minmax(245px,.42fr) minmax(0,.58fr)!important;min-height:410px!important}.subject-feature{min-height:410px!important}.subject-feature-image{width:112%!important;height:120%!important;top:-12%!important;right:-4%!important}.subject-option{grid-template-columns:66px minmax(0,1fr)!important;min-height:68px!important;gap:10px!important}.subject-option>img{width:66px;height:48px}}
@media(max-width:620px){.concepts{padding-block:74px 82px}.subject-showcase{grid-template-columns:1fr!important;gap:12px!important;min-height:0!important}.subject-course-column{gap:12px}.subject-options{display:flex!important;gap:7px!important}.subject-option{grid-template-columns:68px minmax(0,1fr)!important;min-height:66px!important;padding:7px!important}.subject-option>img{width:68px;height:48px}.subject-feature-copy{margin-top:0;padding:0 2px!important}.subject-feature-copy h3{font-size:20px!important}.subject-feature{min-height:360px!important;height:360px}.subject-feature-image{top:0!important;right:0!important;width:100%!important;height:235px!important;object-position:center top!important}.subject-feature-support{left:2%!important;right:2%!important;bottom:0!important;height:125px!important}.subject-feature-copy p{font-size:13px!important}.subject-feature-copy a{font-size:13px!important}}


/* Six subject selector: a compact rail controls one grounded AI-edited apparatus study. */
.concepts{padding-block:clamp(76px,8vw,112px)}
.concepts-heading{margin-bottom:28px}




.subject-showcase{display:grid;grid-template-columns:minmax(195px,.31fr) minmax(0,1fr);gap:18px;align-items:stretch;min-height:438px}
.subject-options{display:flex;flex-direction:column;gap:8px}
.subject-option{display:flex;min-height:78px;flex-direction:column;align-items:flex-start;justify-content:center;gap:5px;padding:12px 16px;border:1px solid #292b2f;border-radius:15px;background:#0e1013;color:#f0f1f2;text-align:left;font:inherit;cursor:pointer}
.subject-option span{font-size:16px;font-weight:550;letter-spacing:.015em}
.subject-option small{color:#aaaeb4;font-size:13px;line-height:1.35}
.subject-option:hover,.subject-option.is-selected{border-color:#777c85;background:#17191d}
.subject-feature{position:relative;min-width:0;min-height:438px;overflow:visible;border:0;border-radius:0;background:none}
.subject-feature-media{position:absolute;inset:0;overflow:visible}
.subject-feature-media,.subject-feature-image,.subject-feature-support{pointer-events:none}
.subject-feature-image{position:absolute;z-index:1;right:1%;top:-14%;width:78%;height:126%;object-fit:contain;object-position:center bottom;filter:drop-shadow(0 20px 30px rgba(0,0,0,.48));transition:opacity .2s ease}
.subject-feature-support{position:absolute;z-index:0;left:3%;right:1%;bottom:0;height:45%;border:1px solid #383a3f;border-radius:22px;background:linear-gradient(180deg,rgba(18,19,21,.05),rgba(18,19,21,.78) 35%,#16181b 72%);box-shadow:0 24px 60px rgba(0,0,0,.28)}
.subject-feature-copy{position:absolute;z-index:2;left:22px;bottom:22px;width:min(42%,390px);padding:8px 0;border:0;border-radius:0;background:transparent;backdrop-filter:none}
.subject-kicker{color:#c2c4c9;font-size:12px;letter-spacing:.08em}
.subject-feature-copy h3{margin:7px 0 5px;font-size:24px;font-weight:550;letter-spacing:.015em}
.subject-feature-copy p{margin:0;color:#c2c4c9;font-size:14px;line-height:1.55}
.subject-feature-copy a,.subject-feature-copy .subject-unavailable{display:inline-block;margin-top:12px;color:#f1f2f4;font-size:14px;text-decoration:underline;text-underline-offset:4px}
.subject-feature-copy .subject-unavailable{color:#b5b7bc;text-decoration:none}
html,body{max-width:100%;overflow-x:clip}
@media(max-width:900px){.subject-showcase{grid-template-columns:190px minmax(0,1fr);min-height:390px}.subject-feature{min-height:390px}.subject-feature-image{width:80%;right:-2%;height:128%;top:-15%}.subject-feature-copy{width:50%}}
@media(max-width:620px){.concepts{padding-block:74px 82px}.concepts-heading{margin-bottom:24px}.subject-showcase{grid-template-columns:1fr;gap:12px;min-height:0}.subject-options{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:7px}.subject-option{min-height:60px;padding:9px 11px;border-radius:12px}.subject-option span{font-size:14px}.subject-option small{font-size:12px}.subject-feature{min-height:380px;overflow:visible}.subject-feature-image{top:0;right:0;width:100%;height:245px;object-fit:contain;object-position:center top}.subject-feature-support{left:2%;right:2%;bottom:0;height:140px;border-radius:16px}.subject-feature-copy{left:4%;bottom:10px;width:92%;padding:5px 0}.subject-feature-copy h3{font-size:19px}.subject-feature-copy p{font-size:12px;line-height:1.45}.subject-feature-copy a,.subject-feature-copy .subject-unavailable{margin-top:7px;font-size:12px}}

/* Direct case selection: subject is metadata inside each card. */
.subject-showcase{min-height:400px!important}
.subject-course-column{gap:16px}
.subject-option-copy{padding-top:8px;padding-right:8px}
.subject-option-copy strong{padding-right:24px}
.subject-option .case-subject{position:absolute;top:9px;right:11px;color:#9a9fa8;font-size:10px;font-weight:400;letter-spacing:.08em;line-height:1}
.subject-feature-copy{display:flex;flex-direction:column;align-items:flex-start;gap:4px}
.subject-feature-copy a{margin-top:2px!important}
.subject-feature{min-height:400px!important}
.subject-feature-image{top:-8%!important;height:114%!important}
.subject-option:focus-visible{outline:2px solid #9ebce8;outline-offset:3px}
@media(max-width:620px){.subject-showcase{min-height:0!important}.subject-feature{min-height:290px!important;height:290px}.subject-feature-image{top:0!important;height:280px!important}.subject-option-copy{padding-top:7px}.subject-option .case-subject{top:8px;right:9px;font-size:10px}.subject-course-column{gap:12px}}

/* v9: lift the real experiment; keep the three desktop downloads together. */
@media(min-width:621px){.hero-downloads{grid-template-columns:repeat(3,minmax(0,1fr))!important;width:100%;max-width:440px;gap:8px}.hero-download{padding-inline:10px!important}.hero-download strong{font-size:13px!important;white-space:nowrap}.hero-download small{font-size:12px!important}}
.concepts-heading{grid-template-columns:1fr;margin-bottom:76px}
@media(max-width:620px){.concepts-heading{margin-bottom:48px}.hero-downloads{grid-template-columns:repeat(2,minmax(0,1fr))!important}.hero-download:last-child{grid-column:1/-1;max-width:100%}}


/* Only the hero's bottom chrome fades as its sticky panel naturally leaves. */
.story-progress,.story-readout{opacity:var(--story-chrome-opacity,1);transition:none}
.story-progress{height:1px;background:rgba(150,158,170,.12)}
.story-progress span{background:#62758d;transition:none}
@media(prefers-reduced-motion:reduce){.story-progress,.story-readout,.story-progress span{transition:none}}

/* Larger apparatus silhouettes, without cropping their support or cable. */
.subject-feature-image{width:132%!important;height:132%!important;right:-12%!important;top:-9%!important}
.subject-showcase,.subject-feature{min-height:470px!important}
.downloads{display:grid;grid-template-columns:minmax(240px,.32fr) minmax(0,.68fr);gap:36px 64px;align-items:start;padding-block:100px 90px}
.downloads-lead{position:static;top:auto}.downloads-lead p{max-width:27ch;margin-top:18px;font-size:16px;line-height:1.6;color:#aeb3bc}
.download-platforms{display:flex;flex-direction:column;gap:10px;margin-top:35px}
.download-platforms button{display:flex;align-items:center;justify-content:space-between;gap:12px;min-height:66px;padding:15px 18px;border:1px solid #30343a;border-radius:18px;background:#101216;color:#d8dce2;font:inherit;font-size:21px;text-align:left;cursor:pointer}
.download-platforms button span{font-size:11px;color:#aeb5c0}.download-platforms button[aria-selected=true]{background:#e7e9ed;color:#101319;border-color:#e7e9ed}.download-platforms button[aria-selected=true] span{color:#5b626c}
.download-workspace{min-width:0}.download-art{display:flex;flex-direction:column;align-items:center;justify-content:center;position:relative;height:330px;margin:0;padding:5px 0 0;overflow:hidden;background:radial-gradient(ellipse at center,#202630 0%,#101317 49%,#08090b 75%)}
.download-art figcaption{margin-top:17px;color:#929ba8;font-size:10px;line-height:1.4;letter-spacing:.02em;text-align:center}
#download-platform-note{min-height:44px;margin:8px 0 12px;color:#aeb6c2;font-size:12px;line-height:1.65}
.download-kinds{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:8px}.download-kinds button{display:flex;min-height:68px;flex-direction:column;justify-content:center;gap:5px;align-items:flex-start;padding:10px 12px;border:1px solid #30343a;border-radius:14px;background:#101216;color:#d6dbe3;cursor:pointer}.download-kinds button strong{font-size:14px;font-weight:550}.download-kinds button small{font-size:10px;color:#969fae}.download-kinds button[aria-pressed=true]{border-color:#a2adbe;background:#1d232c}.download-subjects{display:flex;gap:6px}.download-subjects[hidden]{display:none}.download-subjects button{flex:1;min-height:32px;border:1px solid #363e49;border-radius:9px;background:#10151c;color:#aeb7c5;font:inherit;font-size:11px;cursor:pointer}.download-subjects button[aria-pressed=true]{border-color:#b4c3d9;color:#fff}
.downloads button:focus-visible{outline:2px solid #a4bee2;outline-offset:3px}
@media(max-width:900px){.downloads{gap:28px;grid-template-columns:minmax(190px,.32fr) minmax(0,.68fr)}.download-platforms button{font-size:18px;padding-inline:12px}.download-art{height:285px}}
@media(max-width:620px){.subject-showcase{min-height:0!important}.subject-feature{min-height:330px!important;height:330px}.subject-feature-image{top:-6%!important;right:-10%!important;width:120%!important;height:330px!important}.downloads{grid-template-columns:1fr;padding-block:74px 76px;gap:22px}.download-platforms{flex-direction:row;margin-top:25px;gap:7px}.download-platforms button{flex:1;min-height:58px;flex-direction:column;justify-content:center;gap:5px;padding:9px 4px;border-radius:13px;font-size:16px}.download-platforms button span{font-size:9px}.download-art{height:245px}.download-art figcaption{font-size:9px;margin-top:16px}.download-kinds button{padding-inline:8px;min-height:66px}.download-kinds button strong{font-size:12px}.download-kinds button small{font-size:9px}.download-subjects{display:grid;grid-template-columns:repeat(3,1fr);gap:5px}.download-subjects button{min-height:28px}.download-platforms{position:relative}.downloads-lead p{margin-top:14px}}
@media(prefers-reduced-motion:reduce){.download-art{animation:none!important;transition:none!important}}

/* One small meter belongs to the beaker and follows actual rendered progress. */
.story-meter{position:absolute;z-index:5;left:73%;top:81%;width:min(280px,26vw);transform:translateX(-50%);opacity:var(--story-chrome-opacity,1);pointer-events:none}
.story-meter .story-readout{position:static!important;left:auto!important;right:auto!important;top:auto!important;bottom:auto!important;max-width:none!important;display:grid;grid-template-columns:1fr auto;gap:5px 10px;opacity:1;font-size:11px;align-items:baseline}
.story-meter .story-readout strong{font-size:26px}.story-meter #story-stage{grid-column:1/-1;font-size:11px;color:#a4aab4}.story-meter .readout-label{display:block;font-size:11px;color:#afb5bf}.story-meter .story-progress{position:relative!important;left:auto;right:auto;top:auto!important;bottom:auto!important;height:3px;margin-top:10px;border-radius:3px;overflow:hidden;background:#303740;opacity:1}.story-meter .story-progress span{background:#8093ac;border-radius:3px;height:100%}.story-completion{display:block;margin-top:5px;color:#8e99a8;font-size:10px;text-align:right}
@media(max-width:620px){.story-meter{top:46%;left:50%;width:150px}.story-meter .story-readout{grid-template-columns:1fr auto;gap:2px 6px;font-size:9px}.story-meter .story-readout strong{font-size:17px}.story-meter #story-stage,.story-meter .readout-label{font-size:9px}.story-meter .story-progress{height:2px;margin-top:5px}.story-completion{font-size:9px;margin-top:3px}}


/* AI hardware artwork; each available category is the download itself. */
.download-art{height:390px;gap:8px;padding:0;background:transparent;overflow:hidden}
.download-device-image{display:block;width:100%;height:355px;object-fit:contain;object-position:center}
.download-art figcaption{margin-top:0;font-size:10px;color:#8993a2}
#download-platform-note{min-height:40px;margin:10px 0 14px;line-height:1.6}
.download-kinds>div{min-width:0}.download-kinds .package-card,.download-kinds>button{display:flex;width:100%;height:100%;min-height:70px;flex-direction:column;align-items:flex-start;justify-content:center;gap:6px;padding:11px 13px;border:1px solid #30343a;border-radius:14px;background:#101216;color:#d6dbe3;font:inherit;text-align:left}
.download-kinds .package-card strong{font-size:14px;font-weight:550}.download-kinds .package-card small{font-size:10px;color:#8f99a8}.download-kinds .is-available{background:#e4e8ed;border-color:#e4e8ed;color:#151b23}.download-kinds .is-available small{color:#596573}.download-kinds .package-card:disabled{color:#747d8b;cursor:not-allowed;background:#0d1014}.download-kinds button[aria-expanded=true]{border-color:#9dacc1;background:#1d232c}
.download-subjects{margin-top:12px;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:7px}.download-subjects[hidden]{display:none}.download-subjects .package-card{display:flex;min-height:52px;flex-direction:column;justify-content:center;align-items:center;gap:4px;border:1px solid #2b323d;border-radius:10px;background:#10151b;color:#8d97a6;text-align:center}.download-subjects .package-card strong{font-size:12px;font-weight:500}.download-subjects .package-card small{font-size:9px;color:#697481}.download-subjects button:disabled{cursor:not-allowed}.download-subjects a{color:#e4e9f1}.package-card:focus-visible{outline:2px solid #a4bee2;outline-offset:3px}
@media(max-width:900px){.download-art{height:330px}.download-device-image{height:295px}}
@media(max-width:620px){.download-art{height:270px}.download-device-image{height:240px}.download-art figcaption{font-size:9px}.download-kinds .package-card,.download-kinds>button{padding-inline:9px;min-height:68px}.download-kinds .package-card strong{font-size:12px}.download-kinds .package-card small{font-size:9px}.download-subjects .package-card{min-height:48px}}

/* AI-generated transparent hardware only; source screenshots stay native pixels. */
.download-art{height:auto!important;gap:8px;overflow:visible;pointer-events:none}
.device-composition{position:relative;width:100%;aspect-ratio:3/2;flex:none;isolation:isolate;pointer-events:none}
.device-composition .download-device-image{position:absolute;z-index:0;inset:0;width:100%;height:100%;object-fit:contain;pointer-events:none}
.home-screen-layers{position:absolute;z-index:1;inset:0;pointer-events:none}
.device-source-screen{position:absolute;display:block;object-fit:contain;background:#171717;pointer-events:none}
.screen-desktop{border-radius:.3%}.screen-laptop{border-radius:.2%}.screen-tablet{border-radius:1.2%}
.screen-phone{border-radius:5.4% / 14%;mask-image:radial-gradient(circle at 1.4% 50%,transparent 0 .7%,#000 .9%)}
.download-art figcaption{margin:0;font-size:10px}
@media(max-width:620px){.download-art{gap:6px}.download-art figcaption{font-size:9px}.device-composition{width:100%;aspect-ratio:3/2}}

/* Continuous scene-to-page blend, shared by live canvas and matching poster. */
.story,.story-pin,.concepts{background:#08090b}
.story-scene{-webkit-mask-image:linear-gradient(180deg,#000 0%,#000 78%,rgba(0,0,0,.97) 82%,rgba(0,0,0,.8) 87%,rgba(0,0,0,.45) 93%,rgba(0,0,0,.12) 98%,transparent 100%);mask-image:linear-gradient(180deg,#000 0%,#000 78%,rgba(0,0,0,.97) 82%,rgba(0,0,0,.8) 87%,rgba(0,0,0,.45) 93%,rgba(0,0,0,.12) 98%,transparent 100%)}
@media(min-width:901px){.download-art{--extra-room:max(0px,calc((100vw - 1120px)/2 - 24px));width:calc(100% + var(--extra-room)*.56);margin-left:calc(var(--extra-room)*.44)}.subject-feature-image{width:142%!important;height:142%!important;right:calc(-1 * min(180px,max(0px,calc((100vw - 1120px)/2 - 24px))))!important;top:-8%!important}.subject-showcase,.subject-feature{min-height:510px!important}}

.download-art[data-device=android] .screen-phone{border-radius:4.7% / 11%;mask-image:radial-gradient(circle at 1.8% 50%,transparent 0 .7%,#000 .9%)}
@media(max-width:620px){.download-art{width:100%;margin-left:0}.subject-feature{min-height:350px!important;height:350px}.subject-feature-image{height:350px!important;right:-10%!important;width:120%!important;top:-4%!important}}

@media(min-width:901px){.subject-feature-image[src*="papermaking-complete-v14"]{width:155%!important;height:155%!important;top:-10%!important}}

@media(min-width:901px){.subject-feature-image{transform:translateX(clamp(20px,2vw,44px))}}


/* Keep only the real rounded foreground phone silhouette at the overlap. */
.device-clip-definitions{position:absolute;pointer-events:none;overflow:hidden}
.download-art[data-device=android] .screen-tablet{clip-path:url(#tablet-phone-occlusion)}
@media(min-width:901px){.subject-feature-image[src*="boiling-cutout-knob-v7"]{top:calc(-8% - 56px)!important}}
@media(min-width:621px) and (max-width:900px){.subject-feature-image[src*="boiling-cutout-knob-v7"]{top:calc(-9% - 38px)!important}}
@media(max-width:620px){.subject-feature-image[src*="boiling-cutout-knob-v7"]{top:calc(-4% - 18px)!important}}

/* One shared right-column boundary for artwork, version and download categories. */
@media(min-width:901px){.download-workspace{--extra-room:max(0px,calc((100vw - 1120px)/2 - 24px));width:calc(100% + var(--extra-room)*.56);margin-left:calc(var(--extra-room)*.16)}.download-art{width:100%;margin-left:0}}
@media(min-width:621px) and (min-height:521px){.story-copy{top:calc(26svh + 28px)!important}}
@media(max-width:620px){.story-copy{bottom:52px!important}.download-workspace{width:100%;margin-left:0}}
.downloads{padding-bottom:56px}
.purchase{padding-block:0 96px}
.purchase-panel{display:grid;grid-template-columns:minmax(0,1fr) minmax(280px,.7fr);gap:50px 84px;align-items:center;padding:48px 52px;border:1px solid #30353d;border-radius:28px;background:#111419}
.purchase-eyebrow{display:block;margin-bottom:20px;color:#aab2bf;font-size:12px;letter-spacing:.08em}
.purchase-copy h2{margin:0;color:#f0f2f6;font-size:clamp(34px,3.2vw,46px);font-weight:550;line-height:1.15;letter-spacing:.015em}
.purchase-copy>p{margin:20px 0 0;color:#c1c8d1;font-size:16px;line-height:1.7}
.purchase-terms{display:flex;flex-wrap:wrap;gap:12px 26px;margin-top:26px;color:#9fa8b6;font-size:13px}.purchase-terms strong{color:#e0e5ed;font-weight:550}
.purchase-offer{min-width:0}.purchase-price-label{color:#b4c2d5;font-size:13px}.purchase-price{display:flex;align-items:baseline;gap:20px;margin:7px 0 22px}.purchase-price>strong{font-size:86px;font-weight:550;letter-spacing:-.045em;line-height:1.1}.purchase-price>strong small{font-size:36px;margin-right:5px;letter-spacing:0}.purchase-price>span{font-size:13px;color:#9aa4b4}.purchase-price del{margin-left:3px;color:#9aa4b4;font-size:22px}
#purchase-copy-wechat{display:flex;align-items:center;justify-content:space-between;gap:15px;width:100%;min-height:52px;padding:13px 18px;border:0;border-radius:14px;background:#e4e8ee;color:#151b23;font:inherit;font-size:14px;font-weight:550;cursor:pointer}#purchase-copy-wechat:hover{background:#d5e0ef}#purchase-copy-wechat:focus-visible{outline:2px solid #a4bee2;outline-offset:4px}
.purchase-wechat{margin-top:15px;color:#98a3b3;font-size:12px}.purchase-wechat strong{margin-left:7px;color:#c5cfdd;font-weight:500;letter-spacing:.03em}#purchase-copy-status{min-height:34px;margin:8px 0 0;color:#98a3b3;font-size:11px;line-height:1.6}
@media(max-width:900px){.purchase-panel{padding:36px;gap:35px;grid-template-columns:minmax(0,1fr) minmax(250px,.8fr)}.purchase-copy h2{font-size:34px}.purchase-copy>p{font-size:14px}.purchase-price>strong{font-size:74px}.purchase-terms{flex-direction:column;gap:10px}}
@media(max-width:620px){.downloads{padding-bottom:40px}.purchase{padding-bottom:72px}.purchase-panel{grid-template-columns:1fr;gap:30px;padding:28px 24px;border-radius:22px}.purchase-eyebrow{margin-bottom:16px;font-size:11px}.purchase-copy h2{font-size:34px}.purchase-copy>p{margin-top:16px;font-size:14px}.purchase-terms{flex-direction:row;gap:10px 20px;margin-top:20px;font-size:12px}.purchase-price{margin-bottom:20px}.purchase-price>strong{font-size:76px}.purchase-price>strong small{font-size:30px}.purchase-price del{font-size:20px}#purchase-copy-wechat{font-size:13px}}

.purchase-payment-note{margin:8px 0 0;color:#98a3b3;font-size:11px;line-height:1.6}#purchase-copy-status{margin-top:5px;min-height:34px}

/* Mac distribution is unavailable; preserve layout and remove interactive affordance. */
.hero-download:disabled,.hero-download:disabled:hover{background:#44474c!important;color:#989da5!important;opacity:.7;cursor:not-allowed;border:0;font-family:inherit;text-align:left;box-shadow:none}.hero-download:disabled small{color:inherit}
[data-platform="mac"]:disabled,[data-platform="mac"]:disabled:hover{background:#25282d!important;color:#747b85!important;opacity:.6;cursor:not-allowed;box-shadow:none}