@font-face{font-family:Bodoni Moda;font-style:normal;font-weight:400;font-display:swap;src:url(/ai-web-experience-collection/urushi/fonts/bodoni-moda-latin-400-normal.woff2)format("woff2"),url(/ai-web-experience-collection/urushi/fonts/bodoni-moda-latin-400-normal.woff)format("woff")}@font-face{font-family:Manrope;font-style:normal;font-weight:400;font-display:swap;src:url(/ai-web-experience-collection/urushi/fonts/manrope-latin-400-normal.woff2)format("woff2"),url(/ai-web-experience-collection/urushi/fonts/manrope-latin-400-normal.woff)format("woff")}@font-face{font-family:Manrope;font-style:normal;font-weight:500;font-display:swap;src:url(/ai-web-experience-collection/urushi/fonts/manrope-latin-500-normal.woff2)format("woff2"),url(/ai-web-experience-collection/urushi/fonts/manrope-latin-500-normal.woff)format("woff")}@font-face{font-family:URUSHI CJK;font-style:normal;font-weight:400;font-display:swap;src:url(/ai-web-experience-collection/urushi/assets/fonts/urushi-cjk.woff2)format("woff2")}:root{--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark;--ink:#0b0a09;--paper:#eee4d6;--muted:#b9afa2;--quiet:#978d81;--line:#5b5349;--gutter:clamp(24px, 4.2vw, 140px);--sans:"Manrope", "URUSHI CJK", "Noto Sans CJK SC", "Microsoft YaHei", sans-serif;--serif:"Bodoni Moda", "URUSHI CJK", "Noto Serif CJK SC", "Songti SC", SimSun, serif;--journey-progress:0;--chamber:0;font-family:var(--sans);background:var(--ink);color:var(--paper);scrollbar-gutter:stable;scroll-behavior:auto;-webkit-font-smoothing:antialiased;text-rendering:optimizelegibility}*{box-sizing:border-box}html,body{min-width:280px;margin:0}body{background:var(--ink);overflow-x:clip}body,button,input{font-family:var(--sans)}button,a,input{-webkit-tap-highlight-color:transparent}button,input{color:inherit}button{cursor:pointer}a{color:inherit;text-underline-offset:.25em;text-decoration-thickness:1px}button,a,input{touch-action:manipulation}button{border:0}button:disabled{opacity:.42;cursor:default}[hidden]{display:none!important}::selection{color:#fff1e3;background:#74372c}:focus-visible{outline:1px solid var(--paper);outline-offset:7px}::-webkit-scrollbar{width:5px;height:5px}::-webkit-scrollbar-track{background:var(--ink)}::-webkit-scrollbar-thumb{background:#514b43;border-radius:4px}*{scrollbar-width:thin;scrollbar-color:#514b43 var(--ink)}svg{display:block}svg path{stroke:currentColor;stroke-width:1px;vector-effect:non-scaling-stroke}.skip-link{z-index:20;left:var(--gutter);background:var(--paper);color:var(--ink);padding:12px 20px;font-size:14px;position:fixed;top:20px;transform:translateY(-180%)}.skip-link:focus{transform:translateY(0)}.stage{z-index:0;pointer-events:none;background:var(--ink);position:fixed;inset:0;overflow:hidden}#surface-canvas,#still-surface{width:100%;height:100%;display:block;position:absolute;inset:0}#surface-canvas{opacity:0;transition:opacity .6s ease-out}#still-surface{object-fit:cover;object-position:center;transition:opacity .6s ease-out}[data-renderer=webgl] #surface-canvas{opacity:1}[data-renderer=webgl] #still-surface,[data-renderer=still] #surface-canvas{opacity:0}[data-renderer=still] #surface-canvas,[data-renderer=still] #still-surface{transition:none}[data-renderer=still] #still-surface{opacity:1}[data-still-ready=false] #still-surface{visibility:hidden}.stage-shade{display:none;position:absolute;inset:0}.site-header{z-index:6;width:100%;padding:clamp(22px, 2.15vw, 58px) var(--gutter);pointer-events:none;justify-content:space-between;align-items:center;display:flex;position:fixed;top:0;left:0}.site-header>*{pointer-events:auto}.wordmark{font-family:var(--serif);letter-spacing:.48em;font-size:clamp(20px,1.65vw,38px);font-weight:400;line-height:1.2;text-decoration:none;display:inline-block}.header-nav{align-items:center;gap:clamp(28px,3.4vw,78px);display:flex}.collection-return svg{width:20px;height:20px}.text-button{min-height:44px;color:var(--paper);letter-spacing:.075em;background:0 0;border-radius:0;justify-content:center;align-items:center;gap:10px;padding:8px 0;font-size:clamp(13px,.88vw,19px);font-weight:400;line-height:1.4;text-decoration:none;transition:color .18s ease-out;display:inline-flex}.text-button:hover{color:#fff}.index-toggle{gap:22px}.index-lines{border-top:1px solid var(--muted);transform-origin:100%;border-bottom:1px solid #5e574f;width:45px;height:7px;transition:transform .2s ease-out;display:inline-block}.index-toggle:hover .index-lines{transform:scaleX(1.2)}#journey{z-index:1;outline:none;position:relative}.scene{pointer-events:none;width:100%;min-height:110vh}.scene-copy{z-index:3;top:29%;left:var(--gutter);visibility:hidden;opacity:0;pointer-events:none;width:min(39vw,1080px);transform:translate3d(0, var(--copy-offset,0px), 0);--copy-opacity:1;position:fixed}.scene-copy.is-current{visibility:visible;opacity:var(--copy-opacity)}.scene-copy h1,.scene-copy h2{font-family:var(--serif);letter-spacing:-.04em;text-wrap:balance;margin:0;font-size:clamp(58px,5.75vw,164px);font-weight:400;line-height:1.03}.scene-copy h1{font-size:clamp(66px,5.7vw,164px);line-height:.98}.scene-copy--compact h2{font-size:clamp(44px,4.2vw,118px);line-height:1.15}.scene-body{color:#cec4b7;letter-spacing:.04em;text-wrap:pretty;max-width:35em;margin:clamp(24px,2vw,54px) 0 0;font-size:clamp(16px,1.16vw,27px);line-height:1.65}.scene-copy[data-index="0"] .scene-body{letter-spacing:.13em;font-size:clamp(18px,1.35vw,31px)}.scene-detail{color:var(--muted);letter-spacing:.075em;margin:12px 0 0;font-size:clamp(13px,.9vw,20px);line-height:1.6}.scene-copy[data-index="3"]{top:29%}.scene-copy[data-index="4"]{top:35%}.scene-copy[data-index="9"]{width:42vw;top:34%}.scene-copy[data-index="10"]{top:26%}@media (width>=701px){.scene-copy:not([data-index="0"]){width:28vw}.scene-copy h2{font-size:clamp(44px,4.4vw,126px)}.scene-copy--compact h2{font-size:clamp(35px,3.45vw,98px)}}.journey-footer{z-index:5;bottom:clamp(24px,3.35vw,76px);left:var(--gutter);right:var(--gutter);pointer-events:none;justify-content:space-between;align-items:flex-end;gap:32px;display:flex;position:fixed}.journey-footer>button{pointer-events:auto}.begin-scroll{min-width:150px;color:var(--muted);flex-direction:column;align-items:flex-start;gap:9px;padding-bottom:0;display:flex}.begin-scroll svg{width:23px;height:30px;transition:transform .24s ease-out}.begin-scroll:hover svg{transform:translateY(4px)}.current-chapter{text-transform:uppercase;color:var(--muted);letter-spacing:.14em;justify-content:flex-start;gap:13px;font-size:clamp(11px,.78vw,17px)}#chapter-number{font-variant-numeric:tabular-nums}.journey-position{min-height:38px;color:var(--muted);align-items:center;gap:28px;display:flex}#chapter-note{letter-spacing:.14em;text-transform:uppercase;font-size:clamp(11px,.68vw,15px);line-height:1.4}.progress-rule{background:#4d463e;width:clamp(48px,5.4vw,145px);height:1px;position:relative}.progress-rule i{height:1px;transform:scaleX(var(--journey-progress));transform-origin:0;background:#d7c9b6;display:block;position:absolute;inset:0}.progress-rule:after{content:"";opacity:.55;background:#b6a996;width:16px;height:1px;position:absolute;right:0}.depth-controls{pointer-events:auto;grid-template-columns:auto clamp(135px,5vw,192px);justify-content:start;align-items:center;gap:18px 25px;margin-top:32px;display:grid}:root:not([data-renderer=webgl]) .depth-controls label,:root:not([data-renderer=webgl]) #light-control{display:none}.depth-controls label{color:var(--muted);letter-spacing:.06em;cursor:pointer;font-size:clamp(12px,.55vw,17px)}input[type=range]{cursor:ew-resize;appearance:none;background:0 0;width:clamp(135px,5vw,192px);height:44px;margin:0}input[type=range]::-webkit-slider-runnable-track{background:#74695b;height:1px}input[type=range]::-webkit-slider-thumb{appearance:none;background:var(--paper);border:0;border-radius:50%;width:9px;height:9px;margin-top:-4px}input[type=range]::-moz-range-track{background:#74695b;height:1px}input[type=range]::-moz-range-thumb{background:var(--paper);border:0;border-radius:50%;width:9px;height:9px}.replay{grid-column:1/-1;justify-self:start;gap:23px;font-size:clamp(14px,.6vw,18px)}.replay svg{width:24px;height:20px}.dialog-open{overflow:hidden}dialog{color:var(--paper);overscroll-behavior:contain;background:#14120f;border:0;max-height:100dvh;padding:0}dialog::backdrop{background:#000000b3}.dialog-top{padding:clamp(22px, 2.15vw, 58px) var(--gutter);z-index:2;background:#14120f;justify-content:space-between;align-items:center;display:flex;position:sticky;top:0}.close-dialog{gap:14px}.index-dialog{width:100%;max-width:100%;height:100dvh;margin:0;overflow-y:auto}.index-layout{padding:8vh var(--gutter) 6vh;grid-template-columns:.9fr 1.1fr;align-items:start;gap:5vw;min-height:68vh;display:grid}.index-intro h2{font-family:var(--serif);letter-spacing:-.025em;margin:0;font-size:clamp(46px,4.5vw,112px);font-weight:400;line-height:1.12}.index-intro p{color:var(--muted);letter-spacing:.02em;margin:25px 0 0;font-size:15px;line-height:1.7}.chapter-list{grid-template-rows:repeat(6,auto);grid-template-columns:1fr 1fr;grid-auto-flow:column;column-gap:40px;margin:-10px 0 0;padding:0;list-style:none;display:grid}.chapter-list li{border-bottom:1px solid #39342c}.chapter-list a{grid-template-columns:22px 1fr 20px;align-items:center;gap:13px;min-height:clamp(64px,5.25vw,120px);padding:10px 0;text-decoration:none;display:grid}.index-number{color:#a39584;font-variant-numeric:tabular-nums;letter-spacing:.04em;font-size:11px}.index-name{font-family:var(--serif);letter-spacing:-.025em;font-size:clamp(23px,1.9vw,52px);line-height:1.2}.chapter-list svg{opacity:0;width:18px;height:18px;transition:opacity .18s ease-out,transform .18s ease-out;transform:translate(-5px)}.chapter-list a:hover svg,.chapter-list a:focus-visible svg,.chapter-list a[aria-current=step] svg{opacity:1;transform:translate(0)}.chapter-list a:hover,.chapter-list a[aria-current=step]{color:#fff6e9}.index-settings{margin:0 var(--gutter);padding:20px 0 max(30px, env(safe-area-inset-bottom));border-top:1px solid #39342c;justify-content:space-between;align-items:center;gap:30px;display:flex}.index-settings p{color:var(--quiet);letter-spacing:.045em;font-size:12px}.settings-actions{align-items:center;gap:35px;display:flex}.settings-actions .text-button{color:#c2b6a6;font-size:12px}.about-dialog{width:min(770px,100%);max-width:100%;height:100dvh;margin:0 0 0 auto;box-shadow:-25px 0 80px #00000059}.about-dialog .dialog-top{padding-left:clamp(28px,4vw,66px);padding-right:clamp(28px,4vw,66px)}.about-dialog .wordmark{font-size:20px}.about-content{padding:40px clamp(28px,4vw,66px) 80px}.about-content h2{font-family:var(--serif);letter-spacing:-.035em;margin:0 0 28px;font-size:clamp(40px,3.5vw,68px);font-weight:400;line-height:1.1}.about-content p{color:#c4b9aa;max-width:68ch;margin:0 0 20px;font-size:15px;line-height:1.9}.about-content .about-lead{color:var(--paper);margin-bottom:28px;font-size:19px;line-height:1.7}.about-content h3{margin:44px 0 17px;font-size:16px;font-weight:500;line-height:1.7}.about-content .source-context{color:#ab9e8d;font-size:13px}.source-list{margin:22px 0 35px;padding:0;list-style:none}.source-list li{border-bottom:1px solid #39342c}.source-list a{color:#d4c8b6;justify-content:space-between;gap:20px;padding:16px 0;font-size:13px;line-height:1.6;text-decoration:none;display:flex}.source-list a:hover{color:#fff4df}.source-list svg{flex-shrink:0;width:18px;height:18px;margin-top:1px;transform:rotate(-35deg)}.about-content .asset-note{color:#a99b89;font-size:12px;line-height:1.9}.reading-toggle{border-bottom:1px solid #726454;font-size:13px}.reading-copy{padding-top:20px}.reading-copy h4{text-transform:uppercase;letter-spacing:.08em;color:#e3d6c4;margin:24px 0 10px;font-size:12px;font-weight:500}.reading-copy p{font-size:15px}.render-status{bottom:105px;left:var(--gutter);z-index:5;color:#b6a994;max-width:280px;font-size:12px;line-height:1.6;position:fixed}.noscript{z-index:10;max-width:1600px;padding:7vh var(--gutter) 10vh;background:var(--ink);margin:0 auto;position:relative}.noscript-intro{max-width:1050px}.noscript h1{font-family:var(--serif);letter-spacing:-.03em;margin:0 0 32px;font-size:clamp(50px,6vw,110px);font-weight:400;line-height:1.04}.noscript h1 span{font-size:.65em}.noscript p{font-size:17px;line-height:1.8}.noscript-intro>p{max-width:57ch}.noscript .collection-return{font:inherit!important}.noscript .noscript-caption{color:var(--muted);letter-spacing:.035em;font-size:12px;line-height:1.7}.noscript-index{grid-template-columns:repeat(3,1fr);gap:0 38px;margin:30px 0 0;padding:18px 0 0;list-style:none;display:grid}.noscript-index a{align-items:center;gap:15px;min-height:48px;padding:9px 0;font-size:14px;text-decoration:none;display:flex}.noscript-index a:hover{color:#fff6e9}.noscript-index span{color:var(--quiet);font-variant-numeric:tabular-nums;font-size:12px}.noscript-chapter{margin-top:clamp(75px,10vw,160px);scroll-margin-top:28px}.noscript-chapter figure{margin:0}.noscript-chapter picture,.noscript-chapter img{width:100%;display:block}.noscript-chapter img{height:auto}.noscript-chapter figcaption{justify-content:space-between;gap:25px;padding:18px 0;display:flex}.noscript-chapter-heading{grid-template-columns:1fr 1fr;gap:clamp(30px,5vw,80px);padding-top:25px;display:grid}.noscript-chapter h2{font-family:var(--serif);letter-spacing:-.035em;margin:0;font-size:clamp(38px,4.5vw,82px);font-weight:400;line-height:1.08}.noscript-body p{color:#d4c8b6;margin:0 0 15px;font-size:clamp(16px,1.25vw,22px);line-height:1.8}.noscript-body .noscript-detail{color:var(--muted);font-size:clamp(14px,1vw,17px)}.noscript-translation{max-width:65ch;margin:26px 0 0 calc(50% + 15px)}.noscript-translation summary{cursor:pointer;color:#d4c8b6;min-height:44px;padding:12px 0;font-size:14px}.noscript-translation h3{font:400 30px / 1.55 var(--serif);margin:24px 0}.noscript-translation p{letter-spacing:.03em;font-size:16px;line-height:1.9}.noscript-colophon{border-top:1px solid var(--line);max-width:80ch;margin-top:clamp(90px,13vw,200px);padding-top:35px}.noscript-colophon h2{font:400 36px / 1.2 var(--serif)}.noscript-colophon h3{margin-top:38px;font-size:17px;font-weight:500}.noscript-colophon p,.noscript-colophon li{color:#c4b9aa;font-size:15px;line-height:1.9}.noscript-colophon li{margin-bottom:12px}.noscript-colophon .noscript-translation{margin-left:0}@media (width<=700px),(width<=1100px) and (aspect-ratio<=1){.noscript{padding-top:5vh}.noscript-index{grid-template-columns:1fr 1fr;column-gap:22px}.noscript-index a{gap:11px;font-size:13px}.noscript-chapter figcaption{display:block}.noscript-chapter figcaption span{margin-top:4px;display:block}.noscript-chapter-heading{grid-template-columns:1fr;gap:25px;padding-top:16px}.noscript-chapter h2{font-size:clamp(39px,8vw,70px)}.noscript-translation{margin-left:0}}[data-language=zh] .scene-copy h1,[data-language=zh] .scene-copy h2{letter-spacing:.02em;font-size:clamp(44px,4.6vw,132px);line-height:1.4}[data-language=zh] .scene-copy--compact h2{font-size:clamp(42px,4.2vw,115px)}[data-language=zh] .scene-body{letter-spacing:.1em}[data-language=zh] .index-name{letter-spacing:.08em;font-size:clamp(21px,1.5vw,42px)}[data-language=zh] .index-intro h2{font-size:clamp(36px,3.5vw,88px);line-height:1.4}@media (aspect-ratio>=2) and (width>=900px){.scene-copy{top:24%}.scene-copy h1{font-size:min(5.8vw,13vh)}.scene-copy h2{font-size:min(4.4vw,12vh)}.scene-copy--compact h2{font-size:min(3.45vw,10.5vh)}.scene-copy[data-index="10"]{top:20%}.depth-controls{row-gap:4px;margin-top:12px}}@media (width<=1000px){.scene-copy{width:45vw}.scene-copy h1{font-size:7vw}.scene-copy h2{font-size:4.4vw}.scene-copy--compact h2{font-size:3.45vw}.scene-body{max-width:28em}.scene-copy[data-index="9"]{width:47vw}.index-layout{grid-template-columns:.8fr 1.2fr;gap:35px}.chapter-list{column-gap:22px}.chapter-list a{grid-template-columns:18px 1fr 16px;gap:8px}.index-name{font-size:23px}}@media (width<=700px),(width<=1100px) and (aspect-ratio<=1){:root{--gutter:25px;scrollbar-gutter:auto}.site-header{padding-top:max(21px, env(safe-area-inset-top));padding-bottom:18px}.wordmark{letter-spacing:.35em;font-size:19px}.header-nav{gap:24px}.collection-return span{display:none}.header-nav .text-button{letter-spacing:.04em;font-size:12px}.index-toggle{gap:12px}.index-lines{width:23px;height:6px}.index-toggle:hover .index-lines{transform:none}#still-surface{object-position:center}.stage-shade{background:linear-gradient(#0b0a09 0%,#0b0a0973 29%,#0000 44% 87%,#0b0a0959 100%);display:block}.scene-copy,.scene-copy[data-index="3"],.scene-copy[data-index="4"],.scene-copy[data-index="9"],.scene-copy[data-index="10"]{top:18%;left:var(--gutter);width:calc(100% - var(--gutter) * 2)}.scene-copy:not([data-index="0"]){width:calc(100% - var(--gutter) * 2)}.scene-copy h1{letter-spacing:-.035em;font-size:clamp(54px,14vw,86px);line-height:.97}.scene-copy h2{font-size:clamp(44px,12vw,72px);line-height:1.02}.scene-copy--compact h2{font-size:clamp(35px,9.4vw,57px);line-height:1.15}.scene-copy[data-index="5"] h2,.scene-copy[data-index="10"] h2{font-size:clamp(44px,11.5vw,68px)}.scene-body{letter-spacing:.035em;max-width:28em;margin-top:21px;font-size:14px;line-height:1.75}.scene-copy[data-index="0"] .scene-body{letter-spacing:.08em;margin-top:22px;font-size:15px}.scene-detail{margin-top:9px;font-size:12px}.scene-copy[data-index="4"],.scene-copy[data-index="9"]{top:22%}.scene-copy[data-index="10"]{top:13%}.journey-footer{bottom:max(25px, calc(env(safe-area-inset-bottom) + 15px));align-items:flex-end;gap:18px}.begin-scroll{gap:12px;min-width:132px;font-size:11px}.begin-scroll svg{width:18px;height:25px}.current-chapter{letter-spacing:.1em;gap:9px;font-size:11px}.journey-position{gap:0;min-height:35px}.progress-rule{width:50px}#chapter-note{display:none}.depth-controls{grid-template-columns:auto 120px;gap:4px 18px;margin-top:16px}.depth-controls label{font-size:12px}input[type=range]{width:120px}.replay{gap:18px;min-height:44px;font-size:13px}.replay svg{width:21px}.dialog-top{padding:23px var(--gutter)}.dialog-top .close-dialog{font-size:12px}.index-layout{padding:30px var(--gutter) 35px;min-height:0;display:block}.index-intro h2{font-size:44px;line-height:1.1}.index-intro p{margin-top:14px;font-size:13px}.chapter-list{margin:33px 0 0;display:block}.chapter-list a{grid-template-columns:24px 1fr 18px;gap:14px;min-height:54px;padding:11px 0}.index-name{font-size:26px}.index-number{font-size:11px}.index-settings{flex-direction:column-reverse;align-items:flex-start;gap:17px;padding-top:18px}.index-settings p{margin:0;font-size:11px}.settings-actions{gap:30px}.settings-actions .text-button{font-size:12px}.about-dialog{width:100%}.about-dialog .dialog-top{padding:23px var(--gutter)}.about-content{padding:25px var(--gutter) 60px}.about-content h2{font-size:45px}.about-content .about-lead{font-size:18px;line-height:1.65}.about-content p{font-size:14px;line-height:1.9}.about-content h3{font-size:15px}.source-list a{font-size:12px}.render-status{left:var(--gutter);max-width:270px;font-size:12px;bottom:84px}[data-language=zh] .scene-copy h1,[data-language=zh] .scene-copy h2{font-size:clamp(38px,10vw,58px);line-height:1.5}[data-language=zh] .scene-copy--compact h2{font-size:clamp(34px,9vw,53px)}[data-language=zh] .scene-body{font-size:13px}[data-language=zh] .index-name{font-size:23px}[data-language=zh] .index-intro h2{font-size:36px}[data-language=zh] .about-content h2{letter-spacing:0;font-size:36px;line-height:1.4}}@media (width<=370px){:root{--gutter:21px}.wordmark{font-size:17px}.header-nav{gap:18px}.index-lines{display:none}.scene-copy h1{font-size:51px}.scene-copy--compact h2{font-size:32px}.scene-body{font-size:13px}}@media (height<=600px) and (width>=701px){.scene-copy,.scene-copy[data-index="3"],.scene-copy[data-index="4"],.scene-copy[data-index="9"]{top:25%}.scene-copy h1{font-size:11.4vh}.scene-copy h2{font-size:min(4.4vw,11.4vh)}.scene-copy--compact h2{font-size:min(3.45vw,9vh)}.scene-body{margin-top:18px;font-size:14px}.scene-copy[data-index="5"]{top:16%}[data-language=zh] .scene-copy[data-index="5"] h2,[data-language=zh] .scene-copy[data-index="7"] h2{line-height:1.18}[data-language=zh] .scene-copy[data-index="7"]{top:16%}[data-language=zh] .scene-copy[data-index="7"] h2{max-width:5em}.scene-copy[data-index="9"]{width:36vw}.scene-copy[data-index="10"]{width:36vw;top:20%}.depth-controls{grid-template-columns:auto 95px auto;gap:0 15px;margin-top:10px}.depth-controls label{letter-spacing:.06em;font-size:11px}.depth-controls input{width:95px;height:44px}.replay{grid-column:auto;gap:8px;min-height:44px;font-size:12px}.render-status{top:calc(clamp(22px,2.15vw,58px) + 56px);right:var(--gutter);text-align:right;background:#0b0a09e6;max-width:min(42vw,360px);padding:3px 8px;bottom:auto;left:auto}.journey-footer{bottom:20px}.index-layout{padding-top:30px}}[data-motion=reduced] *,[data-motion=reduced] :before,[data-motion=reduced] :after{transition-duration:0s!important;animation:none!important}[data-motion=reduced] .scene-copy{transform:none}@media (prefers-reduced-motion:reduce){#surface-canvas,#still-surface{transition:none}}