.ps-exp-main{z-index:2;background-color:var(--bg);background-image:linear-gradient(var(--border) 1px, transparent 1px), linear-gradient(90deg, var(--border) 1px, transparent 1px);background-size:40px 40px;position:relative}.ps-exp-hero{min-height:82vh;padding:150px var(--pad-x) 90px;flex-direction:column;justify-content:center;display:flex;position:relative}.ps-exp-h1{letter-spacing:-2px;will-change:transform;margin:0;font-size:clamp(46px,8.4vw,100px);font-weight:500;line-height:1}.ps-exp-lead{color:var(--text);max-width:620px;margin-top:26px;font-size:clamp(17px,2vw,22px);font-weight:500}.ps-exp-sub{color:var(--text-2);max-width:640px;margin-top:16px;font-size:15px}.ps-exp-note{font-family:var(--font-mono);color:var(--text-dim);letter-spacing:1px;margin-top:34px;font-size:10px}.ps-exp-scroll{bottom:26px;right:var(--pad-x);font-family:var(--font-mono);color:var(--text-dim);font-size:11px;position:absolute}@media (width<=820px){.ps-exp-note{display:none}}.ps-domains{z-index:1;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:18px;margin-top:52px;display:grid;position:relative}.ps-domain{background:var(--surface);border:1px solid var(--border-strong);padding:32px 28px}.ps-domain>p{font-family:var(--font-mono);color:var(--accent);margin:0 0 14px;font-size:11px}.ps-domain h3{margin:0 0 16px;font-size:18px;font-weight:500}.ps-domain ul{color:var(--text-2);margin:0;padding:0;font-size:13px;list-style:none}.ps-domain li{padding:6px 0 6px 18px;position:relative}.ps-domain li:before{content:"";background:var(--accent-dim);width:8px;height:1px;position:absolute;top:14px;left:0}.ps-stack{border-top:1px solid var(--border);position:relative}.ps-stack-space{height:auto;padding:100px var(--pad-x);position:relative}.ps-stack-sticky{flex-direction:column;display:flex;position:static}.ps-stack-head{margin-bottom:36px;position:static}.ps-stack-head h2{letter-spacing:-1.1px;z-index:1;max-width:760px;margin:0;font-size:clamp(38px,5.8vw,68px);font-weight:500;line-height:1.05;position:relative}.ps-stack-progress{font-family:var(--font-mono);color:var(--text-dim);font-size:12px;display:none}.ps-stack-progress b{color:var(--accent);font-weight:500}.ps-step{width:100%;margin-bottom:20px;padding:48px 30px;position:static}.ps-step-fig{width:120px;display:none;position:absolute;top:44px;right:42px}.ps-step-fig svg{width:120px;max-width:100%;height:90px}.ps-step-num{font-family:var(--font-mono);color:var(--accent);letter-spacing:1.5px;margin:0 0 16px;font-size:12px}.ps-step h3{letter-spacing:-1px;margin:0;font-size:clamp(30px,4vw,48px);font-weight:500;line-height:1.05}.ps-step>p.txt{color:var(--text-2);max-width:440px;margin-top:16px;font-size:15px}.ps-step-note{font-family:var(--font-mono);color:var(--text-dim);letter-spacing:.5px;margin-top:22px;font-size:10px}.ps-step-ghost{font-family:var(--font-mono);font-size:clamp(60px,7vw,96px);font-weight:500;line-height:1;position:absolute;bottom:22px;right:34px}@media (width>=821px) and (prefers-reduced-motion:no-preference){.js .ps-stack-space{height:500vh;padding:0}.js .ps-stack-sticky{height:100vh;padding:0 var(--pad-x);justify-content:center;position:sticky;top:0;overflow:hidden}.js .ps-stack-head{top:96px;left:var(--pad-x);right:var(--pad-x);z-index:20;margin-bottom:0;position:absolute}.js .ps-stack-progress{top:110px;right:var(--pad-x);z-index:20;display:block;position:absolute}.js .ps-step{will-change:transform, opacity;contain:layout paint;backface-visibility:hidden;width:min(780px,88vw);margin-bottom:0;padding:48px 46px;position:absolute;top:62%;left:50%;transform:translate(-50%,-50%)}.js .ps-step-fig{display:block}}.ps-exp-caps{background:var(--border);border:1px solid var(--border);z-index:1;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:1px;margin-top:52px;display:grid;position:relative}.ps-exp-cap{background:var(--bg-alt);padding:36px 30px}.ps-exp-cap h3{margin:0 0 10px;font-size:15px;font-weight:500}.ps-exp-cap h3 span{font-family:var(--font-mono);color:var(--accent-dim);margin-right:10px;font-size:12px}.ps-exp-cap p{color:var(--text-2);margin:0;font-size:13px}.ps-cap-close{color:var(--text-2);z-index:1;max-width:620px;margin-top:36px;font-size:14px;position:relative}.ps-exp-intro{color:var(--text-2);z-index:1;max-width:620px;margin-top:20px;font-size:15px;position:relative}.ps-chain{z-index:1;margin-top:64px;position:relative}.ps-chain-line{background:var(--border-strong);height:1px;margin:0 20px;position:relative}.ps-chain-fill{background:var(--accent);width:0;height:1px;position:absolute;top:0;left:0}.ps-chain-grid{grid-template-columns:repeat(5,1fr);margin-top:-6px;display:grid}.ps-chain-step{text-align:center;padding:26px 14px 0;position:relative}.ps-chain-dot{background:var(--bg);border:1px solid var(--border-strong);border-radius:50%;width:11px;height:11px;transition:background .4s,border-color .4s;position:absolute;top:0;left:50%;transform:translate(-50%,-50%)}.ps-chain-cn{font-family:var(--font-mono);color:var(--accent);margin-bottom:8px;font-size:10px;transition:color .4s;display:block}.ps-chain-step h3{color:var(--text);margin:0;font-size:16px;font-weight:500;transition:color .4s}.ps-chain-step>p{color:var(--text-2);margin-top:6px;font-size:12px;transition:color .4s}.js .ps-chain-cn{color:var(--accent-dim)}.js .ps-chain-step h3,.js .ps-chain-step>p{color:var(--text-dim)}@media (width<=820px){.ps-chain-grid{grid-template-columns:1fr}.ps-chain-step{text-align:left;padding:18px 0 0}.ps-chain-dot{display:none}}.ps-exp-section-04{padding-bottom:170px}