@font-face{font-family:"Source Han Sans CN";src:url("assets/fonts/SourceHanSansCN-Light.woff") format("woff");font-weight:300;font-display:swap}
@font-face{font-family:"Source Han Sans CN";src:url("assets/fonts/SourceHanSansCN-Regular.woff") format("woff");font-weight:350 500;font-display:swap}
@font-face{font-family:"Source Han Sans CN";src:url("assets/fonts/SourceHanSansCN-Bold.woff?v=20260923-complete") format("woff");font-weight:700;font-display:swap}
@font-face{font-family:Marcellus;src:url("assets/fonts/Marcellus-POLSO.ttf") format("truetype");font-weight:400;font-display:swap}
@font-face{font-family:Urbanist;src:url("assets/fonts/Urbanist.ttf") format("truetype");font-weight:100 900;font-display:swap}
:root{--scale:1;--orange:#ff5b2e;--ink:#050505;--header-height:calc(55px * var(--scale));--page-x:3.35vw;--ease:cubic-bezier(.2,.75,.15,1);color-scheme:light}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:var(--header-height)}
/* Desktop damping owns scrolling; prevent native smooth scrolling from stacking. */
html.lenis,html.lenis body{height:auto}
html.lenis{scroll-behavior:auto!important}
.lenis.lenis-smooth [data-lenis-prevent]{overscroll-behavior:contain}
.lenis.lenis-stopped{overflow:clip}
body{margin:0;background:#fff;color:#393d3d;font-family:-apple-system,BlinkMacSystemFont,"Source Han Sans CN",sans-serif;-webkit-font-smoothing:antialiased;text-rendering:geometricPrecision}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;cursor:pointer}
button,a{-webkit-tap-highlight-color:transparent}
button:focus-visible,a:focus-visible{outline:2px solid var(--orange);outline-offset:5px}
::selection{background:var(--orange);color:#050505}
[hidden]{display:none!important}
.skip-link{position:fixed;top:-90px;left:24px;z-index:300;padding:12px 18px;background:var(--orange);color:#050505}
.skip-link:focus{top:12px}
.site-header{position:fixed;z-index:100;inset:0 0 auto;display:grid;grid-template-columns:1fr auto 1fr;align-items:center;height:var(--header-height);padding:0 var(--page-x);backdrop-filter:blur(18px) saturate(120%);-webkit-backdrop-filter:blur(18px) saturate(120%);background:rgba(255,255,255,.72);color:#050505;border-bottom:1px solid rgba(5,5,5,.07);transition:color .3s ease,background-color .3s ease,border-color .3s ease}
.site-header[data-theme=dark]{background:rgba(12,12,12,.66);color:white;border-bottom-color:rgba(255,255,255,.05)}
.back-link{display:flex;align-items:center;gap:calc(10px * var(--scale));justify-self:start;font-size:calc(13px * var(--scale))}
.back-link>span:last-child,.language-control button{position:relative}
.back-link>span:last-child:after,.language-control button:after{content:"";position:absolute;left:0;right:100%;bottom:-6px;height:1px;background:currentColor;transition:right .25s ease}
.back-link:hover>span:last-child:after,.language-control button:hover:after{right:0}
.project-name{font-size:calc(13px * var(--scale));font-weight:400}
.language-control{justify-self:end;display:flex;gap:calc(7px * var(--scale));font-size:calc(12px * var(--scale))}
.language-control button{padding:0;border:0;background:none;opacity:.5;transition:opacity .2s ease}
.language-control button.active{opacity:1;font-weight:700}
.reading-progress{position:absolute;bottom:-1px;left:0;width:100%;height:1.5px;pointer-events:none}
.reading-progress span{display:block;width:100%;height:100%;background:var(--orange);transform:scaleX(.0572917);transform-origin:left;will-change:transform}
.panel{position:relative;width:100%;overflow:hidden;background:white;scroll-margin-top:0}
.panel:focus{outline:none}
.artboard{position:relative;width:1440px;transform:scale(var(--scale));transform-origin:top left;isolation:isolate;overflow:hidden}
.layer{position:absolute;margin:0;padding:0}
.artwork{object-fit:fill;max-width:none}
.vector{max-width:none;pointer-events:none}
.text{white-space:pre-wrap;overflow:visible;word-break:normal;overflow-wrap:normal;font-synthesis:none}
.text span{white-space:inherit;font-synthesis:none}
.shape{pointer-events:none}
.chapter-nav{position:fixed;z-index:50;left:calc(48px * var(--scale));top:50%;transform:translateY(-50%);width:calc(130px * var(--scale));display:grid;gap:calc(14px * var(--scale));opacity:0;visibility:hidden;transition:opacity .14s ease,visibility .14s ease}
.chapter-nav.is-visible{opacity:1;visibility:visible}
.chapter-nav a{display:flex;align-items:center;gap:calc(9px * var(--scale));font-family:"Source Han Sans CN",sans-serif;font-weight:300;font-size:calc(11px * var(--scale));line-height:calc(13px * var(--scale));white-space:nowrap;color:#8B8B8B;transition:color .22s ease,transform .22s ease}
.chapter-dot{width:calc(8px * var(--scale));height:calc(8px * var(--scale));flex-shrink:0;border:1px solid currentColor;border-radius:50%;transition:background-color .25s ease,border-color .25s ease}
.chapter-nav a[aria-current=location]{color:#000;font-weight:500}
.chapter-nav a[aria-current=location] .chapter-dot{background:currentColor;border-color:currentColor}
.chapter-nav a:hover{color:var(--orange);transform:translateX(3px)}
.round-arrow{display:grid;place-items:center;width:58px;height:58px;border:1.208px solid #9a9a9a;border-radius:50%;color:#9a9a9a;font-size:24.167px;line-height:1;transition:background .25s ease,color .25s ease,border-color .25s ease,transform .25s ease}
.cover-arrow{position:absolute;left:1317px;top:680px}
.cover-arrow:hover,.cover-arrow:focus-visible,.cover-arrow.is-scroll-active{background:var(--orange);border-color:var(--orange);color:#fff;transform:rotate(45deg)}
.project-pagination{--switch-frame-background:#fff;--switch-frame-rule:#d2d2d2;position:relative;width:100%;height:calc(412px * var(--scale));background:var(--switch-frame-background);border-top:1px solid var(--switch-frame-rule)}
.project-switch{position:absolute;top:calc(108px * var(--scale));display:flex;align-items:center;gap:calc(24px * var(--scale));height:calc(180px * var(--scale))}
.project-switch.previous{left:calc(94px * var(--scale))}
.project-switch.next{right:calc(95px * var(--scale))}
.project-switch .round-arrow{width:calc(58px * var(--scale));height:calc(58px * var(--scale));border-width:calc(1.208px * var(--scale));font-size:calc(24.167px * var(--scale))}
.project-thumb{position:relative;display:block;width:calc(335px * var(--scale));height:calc(180px * var(--scale));overflow:hidden;border-radius:calc(8px * var(--scale));isolation:isolate}
.thumb-image{display:block;width:100%;height:100%;object-fit:cover;transition:filter .45s ease,transform .6s cubic-bezier(.2,.75,.2,1)}
.piotti-thumb{background:linear-gradient(135deg,#383838,#111)}
.piotti-thumb img{width:68.955224%;height:100%;margin-left:18.80597%;object-fit:fill}
.thumb-label{position:absolute;inset:0;display:flex;flex-direction:column;gap:calc(4px * var(--scale));align-items:center;justify-content:center;color:rgba(255,255,255,.8);font-family:"Source Han Sans CN",sans-serif;font-size:calc(16px * var(--scale));font-weight:300;line-height:1.2;background:rgba(5,5,5,.32);opacity:0;transform:translateY(6px);transition:opacity .36s ease,transform .48s cubic-bezier(.18,.7,.18,1)}
.thumb-direction,.thumb-project-name{font-size:inherit;font-weight:inherit;line-height:1.2;color:inherit}
.thumb-project-name{font-family:"SF Pro Display","SF Pro Text",-apple-system,BlinkMacSystemFont,sans-serif;font-size:calc(13px * var(--scale));font-weight:700}
.project-switch:hover .thumb-image,.project-switch:focus-visible .thumb-image{filter:blur(10px);transform:scale(1.04)}
.project-switch:hover .thumb-label,.project-switch:focus-visible .thumb-label{opacity:1;transform:translateY(0)}
.project-switch:hover .round-arrow,.project-switch:focus-visible .round-arrow{color:#050505;border-color:#050505}
.project-footer{position:absolute;left:var(--page-x);right:var(--page-x);bottom:calc(32px * var(--scale));display:flex;justify-content:space-between;color:#a3a3a3;font-size:calc(10px * var(--scale));letter-spacing:.08em}
.project-footer a{transition:color .2s ease}
.project-footer a:hover,.project-footer a:focus-visible{color:var(--orange)}
.sequence-panel{height:calc(var(--sequence-height) * 1px * var(--scale) * var(--sequence-steps));overflow:visible;aspect-ratio:auto!important}
.sequence-pin{position:sticky;top:var(--header-height);height:calc(var(--sequence-height) * 1px * var(--scale));overflow:hidden}
.sequence-pin>.artboard{position:absolute;inset:0 auto auto 0}
.color-slide{position:absolute;inset:0;opacity:0;visibility:hidden;filter:blur(5px);transition:opacity .38s var(--ease),filter .42s var(--ease),visibility .38s}
.color-slide.is-active{opacity:1;visibility:visible;filter:blur(0)}
.palette-tabs{position:absolute;left:693px;top:669px;display:flex;gap:7px}
.palette-dot{display:grid;place-items:center;width:24px;height:24px;border-radius:50%}
.palette-dot:before{content:"";display:block;width:8px;height:8px;border-radius:50%;background:#d9d9d9;transition:background .25s ease,transform .25s ease}
.palette-dot.is-active:before{background:var(--orange);transform:scale(1.08)}
.js .app-screens [data-node-id="3574:2879"],.js .app-screens [data-node-id="3574:2880"],.js .app-screens [data-node-id="3574:2881"],.js .app-screens [data-node-id="3574:2882"]{opacity:0;filter:blur(7px);transform:translateY(28px);transition:opacity .552s var(--ease),filter .656s var(--ease),transform .768s var(--ease);will-change:opacity,filter,transform}
.js .app-screens .app-screen-is-visible{opacity:1;filter:blur(0);transform:translateY(0)}
.js .app-screens .app-screen-instant{transition:none!important}
.page-exit{position:fixed;inset:0;z-index:200;pointer-events:none;opacity:0;background:rgba(255,255,255,.95);backdrop-filter:blur(14px);transition:opacity .35s var(--ease)}
body.is-leaving .page-exit{opacity:1}
body.is-leaving{cursor:progress}
html[lang=en] .text{overflow-wrap:normal}
@media(max-width:700px){
  :root{--header-height:48px}
  .site-header{padding:0 20px}
  .back-link,.project-name{font-size:12px}
  .language-control{gap:7px;font-size:11px}
  main{padding-top:48px}
  .chapter-nav{left:0;right:0;top:auto;bottom:0;transform:none;width:100%;display:flex;overflow-x:auto;gap:18px;padding:14px 18px max(14px,env(safe-area-inset-bottom));background:rgba(255,255,255,.9);backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);scrollbar-width:none}
  .chapter-nav a{gap:6px;font-size:11px;line-height:16px;flex-shrink:0;padding:5px 0}
  .chapter-dot{width:6px;height:6px}
  .panel{scroll-margin-top:0}
  .project-pagination{min-height:220px}
  .project-switch{top:36px;height:90px;gap:8px}
  .project-switch.previous{left:14px}
  .project-switch.next{right:14px}
  .project-switch .round-arrow{width:26px;height:26px;font-size:16px}
  .project-thumb{width:calc((100vw - 110px)/2);height:90px;border-radius:5px}
  .thumb-label{font-size:10px;gap:4px}
  .thumb-project-name{font-size:10px}
  .project-footer{bottom:28px;left:18px;right:18px;font-size:8px}
  .project-footer a{padding:12px 0}
  .project-switch:focus-visible{outline-offset:2px}
}
@media(hover:none){.thumb-label{opacity:1;transform:none;background:rgba(5,5,5,.32)}.palette-dot{width:30px;height:30px}.palette-tabs{left:684px;gap:1px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{animation-duration:.01ms!important;transition-duration:.01ms!important;animation-iteration-count:1!important}.page-exit{display:none}.js .app-screens [data-node-id="3574:2879"],.js .app-screens [data-node-id="3574:2880"],.js .app-screens [data-node-id="3574:2881"],.js .app-screens [data-node-id="3574:2882"]{opacity:1;filter:none;transform:none}}
/* 调研流程四个阶段的编号 */
#research [data-node-id="3573:325"], /* 01 */
#research [data-node-id="3573:412"], /* 02 */
#research [data-node-id="3573:415"], /* 03 */
#research [data-node-id="3573:418"]  /* 04 */
{
  color: var(--orange) !important;
}

/* Shared author identity in the project-detail navigation. */
.profile-link{justify-self:end;display:inline-flex;align-items:center;gap:0;font-size:calc(12px * var(--scale));letter-spacing:.08em;line-height:1;white-space:nowrap;transition:transform .25s ease}
.profile-link::after{content:"→";width:0;margin-left:0;overflow:hidden;opacity:0;transform:translateX(-5px);transition:width .25s ease,margin-left .25s ease,opacity .2s ease,transform .25s ease}
.profile-link:hover,.profile-link:focus-visible{transform:translateX(-4px)}
.profile-link:hover::after,.profile-link:focus-visible::after{width:.9em;margin-left:.42em;opacity:1;transform:translateX(0)}
.profile-link:focus-visible{outline:1px solid currentColor;outline-offset:5px}
.site-header .project-name,.site-header .profile-link{font-family:"SF Pro Text","SF Pro Display",-apple-system,BlinkMacSystemFont,sans-serif;font-weight:400}