:root{--bg:#11151b;--panel:#181d25;--panel-hover:#1e242d;--line:#2a323d;--text:#e9edf2;--muted:#a7b0bc;--accent:#c99a54;--accent-blue:#71b5c4;--mono:ui-monospace,SFMono-Regular,Consolas,monospace;--sans:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",Arial,sans-serif;color-scheme:dark}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:96px}
body{margin:0;color:var(--text);font:16px/1.7 var(--sans);background:var(--bg);min-width:320px}
button{font:inherit}a{color:inherit;text-decoration:none}img{max-width:100%;height:auto}button,a{-webkit-tap-highlight-color:transparent}
:focus-visible{outline:2px solid var(--accent);outline-offset:5px}
.skip-link{position:absolute;top:-70px;left:16px;z-index:100;padding:10px 16px;background:var(--accent);color:var(--bg)}.skip-link:focus{top:10px}
.wrap{width:min(1120px,calc(100% - 56px));margin:0 auto}
.site-header{position:sticky;top:0;z-index:20;border-bottom:1px solid var(--line);background:var(--bg)}
.header-inner{display:flex;align-items:center;gap:24px;min-height:76px}.brand{display:flex;align-items:center;gap:10px;flex:none;font-size:20px;font-weight:800;letter-spacing:-.04em;line-height:1}.brand img,.footer-brand img{object-fit:contain;filter:invert(1) hue-rotate(180deg);mix-blend-mode:screen}.brand small{display:block;margin-top:5px;font-size:10px;font-weight:500;letter-spacing:.04em;color:var(--muted)}.accent{color:var(--accent)}
.desktop-nav{display:flex;align-items:center;justify-content:flex-end;gap:24px;flex:1;min-width:0;white-space:nowrap;font-size:13px;color:var(--muted)}.desktop-nav a:hover,.mobile-nav a:hover,.footer-links a:hover{color:var(--accent)}
.menu-toggle{display:none;flex-direction:column;justify-content:center;align-items:center;gap:5px;margin-left:auto;width:44px;height:44px;border:1px solid var(--line);border-radius:4px;background:var(--panel);color:var(--text);cursor:pointer}.menu-toggle span{width:18px;height:2px;background:currentColor}.mobile-nav[hidden]{display:none!important}.mobile-nav{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0 18px;padding:8px max(28px,calc((100vw - 1120px)/2)) 20px;border-top:1px solid var(--line);background:var(--bg)}.mobile-nav a{padding:13px 0;border-bottom:1px solid var(--line);font-size:14px}
.eyebrow,.feature-number{font:600 12px/1.5 var(--mono);letter-spacing:.05em;color:var(--accent-blue)}
h1,h2,h3,p{margin-top:0}h1{max-width:940px;margin-bottom:24px;font-size:clamp(36px,5vw,66px);line-height:1.2;letter-spacing:-.04em}h1 em{font-style:normal;color:var(--accent)}h2{margin-bottom:0;font-size:clamp(28px,3vw,37px);line-height:1.4;letter-spacing:-.025em}
.hero{padding:64px 0 0;border-bottom:1px solid var(--line)}.hero .eyebrow{margin:0 0 23px}.hero-layout{display:grid;grid-template-columns:1.15fr .85fr;gap:68px;align-items:center}.hero h1{font-size:clamp(40px,4.8vw,62px);line-height:1.18;margin-bottom:26px}.hero-lede{max-width:620px;margin-bottom:0;color:var(--muted);font-size:16px;line-height:1.85}.hero-actions,.contact-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:30px}.hero-author{font-size:12px;color:var(--muted);margin:22px 0 0}.hero-author a:hover{color:var(--accent)}
.button{display:inline-flex;align-items:center;justify-content:center;gap:18px;min-height:46px;padding:11px 19px;border:1px solid var(--line);border-radius:4px;cursor:pointer;font-weight:650;font-size:14px;transition:background-color .15s,color .15s,border-color .15s}.button-primary{background:var(--accent);border-color:var(--accent);color:#11151b}.button-primary:hover{background:#e0b579}.button-outline{background:var(--panel);color:var(--text)}.button-outline:hover{border-color:var(--accent);color:var(--accent)}
.workflow-card{padding:27px 30px 0;border:1px solid #c99a5450;border-radius:6px;background:var(--panel);position:relative;overflow:hidden}.workflow-topline{display:flex;justify-content:space-between;gap:14px;color:var(--accent);font:11px var(--mono);padding-bottom:20px;border-bottom:1px solid var(--line)}.workflow-card h2{font-size:26px;line-height:1.5;margin:22px 0}.workflow-card ol{list-style:none;margin:0;padding:0}.workflow-card li{display:grid;grid-template-columns:30px 1fr;gap:14px;padding:15px 0;border-top:1px solid var(--line)}.workflow-card li>span{padding-top:4px;font:12px var(--mono);color:var(--accent-blue)}.workflow-card h3{font-size:15px;margin:0 0 4px}.workflow-card li p{font-size:13px;color:var(--muted);line-height:1.8;margin:0}.workflow-footnote{margin:10px -30px 0;padding:16px 30px;background:var(--bg);color:var(--muted);font-size:11px}
.home-overview{display:flex;justify-content:space-between;align-items:center;gap:18px;flex-wrap:wrap;margin-top:48px;padding:22px 0;border-top:1px solid var(--line);color:var(--muted);font-size:12px}.home-overview strong{font:17px var(--mono);color:var(--accent);margin-right:4px}
.section{padding:76px 0;border-bottom:1px solid var(--line)}.section>.wrap>.eyebrow{margin:0 0 14px}.section-intro{display:flex;justify-content:space-between;align-items:end;gap:34px}.section-intro h2{max-width:580px}.section-intro p{max-width:390px;margin:0;color:var(--muted);font-size:14px;line-height:1.85}
.start-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px;margin-top:32px}.start-grid article{display:flex;flex-direction:column;padding:27px 30px;border:1px solid var(--line);border-radius:6px;background:var(--panel);transition:border-color .15s}.start-grid article:hover{border-color:#c99a5470}.scenario-heading{display:flex;justify-content:space-between;gap:12px;color:var(--accent-blue);font:12px var(--mono)}.scenario-heading span:last-child{color:var(--muted)}.start-grid h3{font-size:23px;line-height:1.45;margin:20px 0 12px}.start-grid p{font-size:14px;color:var(--muted);margin:0 0 14px;line-height:1.8}.start-grid .scenario-output{font-size:12px;margin:0 0 20px;color:var(--text)}.scenario-links{display:flex;gap:10px 22px;flex-wrap:wrap;margin-top:auto;padding-top:17px;border-top:1px solid var(--line)}.scenario-links a{color:var(--accent);font-size:13px;min-height:28px;display:inline-flex;align-items:center}.scenario-links a:hover{text-decoration:underline;text-underline-offset:4px}
.home-reading-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-top:32px}.reading-feature{display:flex;flex-direction:column;min-width:0;padding:30px;border:1px solid var(--line);border-radius:6px;background:var(--panel)}.reading-feature-top{display:flex;justify-content:space-between;gap:20px;color:var(--accent-blue);font-size:12px}.reading-feature h3{font-size:28px;line-height:1.5;margin:34px 0 18px}.reading-feature p{font-size:14px;color:var(--muted);margin-bottom:26px}.reading-takeaway{font-size:12px;color:var(--accent);padding-top:18px;border-top:1px solid var(--line);margin-top:auto}.reading-side-list{border-top:1px solid var(--line);min-width:0}.reading-side-list a{display:block;padding:20px 0;border-bottom:1px solid var(--line)}.reading-side-list span{font-size:11px;color:var(--accent-blue)}.reading-side-list h3{font-size:19px;line-height:1.5;margin:8px 0}.reading-side-list p{font-size:13px;color:var(--muted);margin:0 0 12px}.reading-side-list b{font-size:12px;font-weight:500;color:var(--accent)}.reading-feature:hover,.resource-grid a:hover{border-color:#c99a5470;background:var(--panel-hover)}.homepage-more{display:flex;gap:24px;flex-wrap:wrap;margin:24px 0 0;font-size:13px;color:var(--accent)}
.feature-grid,.platform-grid,.resource-grid{display:grid;gap:18px;margin-top:30px}.feature-grid,.resource-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.feature-grid article,.resource-grid a{display:flex;flex-direction:column;min-width:0;min-height:210px;padding:28px;border:1px solid var(--line);border-radius:6px;background:var(--panel);transition:background-color .15s,border-color .15s}.feature-grid h3,.resource-grid h3{margin:17px 0 8px;font-size:21px;line-height:1.4}.feature-grid p,.resource-grid p{max-width:52ch;margin:0 0 22px;color:var(--muted);font-size:14px}.feature-grid a,.resource-grid b{margin-top:auto;color:var(--accent);font-size:13px;font-weight:600}.resource-grid a>span,.platform-card>span{color:var(--accent-blue);font:600 12px var(--mono)}.tool-boundary{color:var(--muted);font-size:12px;line-height:1.9;margin:22px 0 0;max-width:780px}
.platform-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.platform-card{display:flex;flex-direction:column;min-width:0;min-height:180px;padding:24px;border:1px solid var(--line);border-radius:6px;background:var(--panel);transition:background-color .15s}.platform-card:hover{background:var(--panel-hover)}.platform-card h3{margin:10px 0 4px;font-size:18px}.platform-card p{margin:0 0 18px;color:var(--muted);font-size:13px}.platform-card b,.text-action{margin-top:auto;color:var(--accent);font-size:13px;font-weight:600}.text-action{align-self:start;padding:0;border:0;background:transparent;cursor:pointer}
.article-list{margin-top:28px;border-top:1px solid var(--line)}.article-list article{display:grid;grid-template-columns:150px 1fr;gap:30px;padding:26px 0;border-bottom:1px solid var(--line)}.article-list article>span{color:var(--accent-blue);font:600 12px var(--mono)}.article-list h3{margin-bottom:7px;font-size:20px}.article-list p{margin-bottom:10px;color:var(--muted);font-size:14px}.article-list a{color:var(--accent);font-weight:650;font-size:14px}.resource-cta{display:flex;align-items:center;justify-content:space-between;gap:15px;margin-top:30px}.resource-cta p{margin:0;color:var(--muted)}
.faq-list{margin-top:36px;border-top:1px solid var(--line)}.faq-list details{padding:20px 0;border-bottom:1px solid var(--line)}.faq-list summary{display:flex;justify-content:space-between;gap:15px;cursor:pointer;font-size:16px;font-weight:650;list-style:none}.faq-list summary::-webkit-details-marker{display:none}.faq-list summary::after{content:'+';color:var(--accent);font:700 22px/1 var(--mono)}.faq-list details[open] summary::after{content:'−'}.faq-list details p{max-width:750px;margin:13px 0 0;color:var(--muted);font-size:14px}
.history-teaser{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:start}.history-teaser .eyebrow{margin-bottom:16px}.history-teaser h2{font-family:"Songti SC",STSong,serif;font-weight:600;font-size:35px;line-height:1.5}.history-teaser p{max-width:460px;margin:20px 0 24px;color:var(--muted);font-size:14px}.history-teaser-stories{border-top:1px solid var(--line)}.history-teaser-stories a{display:block;padding:24px 0;border-bottom:1px solid var(--line)}.history-teaser-stories span{font:11px var(--mono);color:var(--accent-blue)}.history-teaser-stories h3{font-size:22px;line-height:1.5;margin:12px 0}.history-teaser-stories p{margin:12px 0;font-size:13px}.history-teaser-stories b{font-size:13px;font-weight:500;color:var(--accent)}
.home-return>.wrap{display:grid;grid-template-columns:1fr auto;gap:56px;align-items:center}.home-return h2{font-size:28px}.home-return p:not(.eyebrow){font-size:14px;color:var(--muted);margin:17px 0 0}.return-actions{display:grid;gap:12px;justify-items:stretch}.return-actions .quiet-link{margin-top:6px;font-size:12px;text-align:center}.quiet-link{font:inherit;color:var(--accent);background:none;border:0;padding:0;text-decoration:underline;text-underline-offset:4px;cursor:pointer}
.contact-email{font:13px var(--mono)}.qr-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-top:22px}.qr-grid figure{margin:0;text-align:center}.qr-grid img{display:block;width:100%;max-width:160px;height:auto;aspect-ratio:1;object-fit:cover;margin:0 auto}.qr-grid figcaption{margin-top:8px;color:var(--muted);font-size:12px}
.site-footer{padding:40px 0 calc(24px + env(safe-area-inset-bottom,0px));background:var(--bg)}.footer-main-grid{display:grid;grid-template-columns:1.3fr 1fr 1fr;gap:40px;align-items:start}.footer-brand{display:flex;align-items:center;gap:12px}.footer-brand strong,.footer-brand small{display:block}.footer-brand strong{font-size:16px}.footer-brand small{color:var(--muted);font-size:11px;margin-top:5px}.footer-links{display:flex;flex-wrap:wrap;gap:12px 18px;color:var(--muted);font-size:12px}.footer-bottom{display:flex;justify-content:space-between;align-items:center;gap:20px;margin-top:34px;padding-top:20px;border-top:1px solid var(--line);color:var(--muted);font-size:11px}.footer-bottom>div{display:flex;gap:24px}
@media(max-width:1050px){.desktop-nav{gap:16px;font-size:12px}.hero-layout{gap:36px}.workflow-card{padding-inline:24px}.workflow-footnote{margin-inline:-24px;padding-inline:24px}.hero h1{font-size:49px}.hero-actions .button{padding-inline:14px;font-size:13px}.workflow-card h2{font-size:23px}}
@media(max-width:900px){.desktop-nav{display:none}.menu-toggle{display:flex}.hero-layout{gap:28px}.hero h1{font-size:43px}.hero-author{font-size:11px}.hero-actions{gap:10px}.hero-actions .button{font-size:12px;padding-inline:12px}}
@media(max-width:720px){.wrap{width:min(100% - 36px,620px)}.hero{padding-top:42px}.hero-layout{grid-template-columns:1fr;gap:32px}.hero h1{font-size:43px;line-height:1.2}.hero-lede{font-size:15px}.hero-actions .button{font-size:13px;gap:12px}.hero-author{font-size:11px}.workflow-card{padding:22px 24px 0}.workflow-card h2{font-size:24px;margin:18px 0}.workflow-card h2 br{display:none}.workflow-topline{padding-bottom:15px}.workflow-card li{padding:13px 0}.workflow-footnote{padding:15px 24px}.home-overview{margin-top:30px;gap:14px 20px;font-size:11px}.home-overview span:last-child{width:100%}.section{padding:52px 0}.section-intro{display:block}.section-intro p{margin-top:15px}.start-grid,.home-reading-grid,.feature-grid,.resource-grid{grid-template-columns:1fr}.start-grid article{padding:24px}.start-grid h3{font-size:22px;margin-top:18px}.home-reading-grid{gap:24px}.reading-feature{padding:25px}.reading-feature h3{font-size:26px;margin-top:28px}.platform-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.article-list article{grid-template-columns:1fr;gap:9px}.resource-cta{align-items:start;flex-direction:column}.history-teaser{grid-template-columns:1fr;gap:26px}.history-teaser h2{font-size:31px}.history-teaser-stories h3{font-size:21px}.home-return>.wrap{grid-template-columns:1fr;gap:26px}.return-actions{justify-items:start}.return-actions .quiet-link{text-align:left}.footer-main-grid{grid-template-columns:1fr 1fr;gap:26px 20px}.footer-main-grid .footer-brand{grid-column:1/-1}.footer-links{flex-direction:column;gap:12px}.footer-bottom{align-items:start;flex-direction:column;gap:14px}}
@media(max-width:380px){.hero h1{font-size:38px}.hero-actions{flex-direction:column;align-items:start}.platform-grid{grid-template-columns:1fr}.scenario-links{gap:10px 16px}.home-overview{font-size:10px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{animation-duration:.01ms!important;transition-duration:.01ms!important}}

/* Short entrance and pointer feedback; content stays visible without motion. */
@media(prefers-reduced-motion:no-preference){
  @keyframes witflow-home-enter{
    from{opacity:.6;transform:translateY(8px)}
    to{opacity:1;transform:translateY(0)}
  }
  .hero .hero-copy{animation:witflow-home-enter 420ms ease-out backwards}
  .hero .workflow-card{animation:witflow-home-enter 420ms ease-out 80ms backwards}
  @media(hover:hover) and (pointer:fine){
    .start-grid>article,.home-reading-grid>.reading-feature,.feature-grid>article,.resource-grid>a,.platform-grid>.platform-card{
      transition:transform 180ms ease,border-color 180ms ease,background-color 180ms ease;
    }
    .start-grid>article:hover,.home-reading-grid>.reading-feature:hover,.feature-grid>article:hover,.resource-grid>a:hover,.platform-grid>.platform-card:hover{
      transform:translateY(-2px);border-color:#c99a5470;
    }
    .button>span[aria-hidden="true"]{display:inline-block;transition:transform 180ms ease}
    .button:hover>span[aria-hidden="true"],.button:focus-visible>span[aria-hidden="true"]{transform:translateX(2px)}
  }
}