:root{--ink:#10191e;--paper:#f0eee8;--paper-2:#f8f6f1;--copper:#c4a374;--blue:#4a78a8;--blue-pale:#e8f1fb;--violet:#8b5fbf;--violet-pale:#f3e8ff;--green:#4b9560;--green-pale:#e8f5ec;--red:#b35252;--red-pale:#fde7e7;--gold:#c38a1b;--gold-pale:#fff4d6;--line:#bab7ae;--body:#27333b}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--body);font-family:"Noto Sans TC","Microsoft JhengHei",Arial,sans-serif;line-height:1.65}.skip-link{position:fixed;top:-4rem;left:1rem;background:var(--ink);color:white;padding:.75rem 1rem;z-index:99}.skip-link:focus{top:1rem}.masthead{background:var(--ink);color:#fff;padding:clamp(3.5rem,9vw,8rem) max(7vw,2rem) 3rem;min-height:590px;position:relative;overflow:hidden}.masthead:after{content:"";position:absolute;right:-15rem;bottom:-21rem;width:52rem;height:52rem;border-radius:50%;border:1px solid rgba(196,163,116,.45);box-shadow:0 0 0 6rem rgba(196,163,116,.06),0 0 0 12rem rgba(196,163,116,.04)}.brand{display:flex;align-items:center;gap:.65rem;font-weight:700;letter-spacing:.02em;position:relative;z-index:1}.brand em{font-style:normal;font-size:.64rem;letter-spacing:.18em;opacity:.65;margin-left:.35rem}.brand-mark{display:grid;place-items:center;width:1.7rem;height:1.7rem;border:1px solid var(--copper);color:var(--copper);font-family:Georgia,serif;font-size:1.1rem}.eyebrow,.section-kicker{font-size:.72rem;letter-spacing:.18em;text-transform:uppercase;color:var(--copper);font-weight:800;margin:4.5rem 0 1rem;position:relative;z-index:1}.masthead h1{font-size:clamp(2.8rem,7.8vw,7.4rem);line-height:.96;letter-spacing:-.07em;margin:0;max-width:1000px;position:relative;z-index:1;font-weight:700}.masthead h1 span{color:var(--copper);font-family:Georgia,"Noto Serif TC",serif;font-weight:400}.lede{font-size:clamp(1.05rem,1.9vw,1.36rem);max-width:660px;margin:2.1rem 0 0;position:relative;z-index:1;color:#e5e8e8}.hero-rule{height:1px;background:linear-gradient(90deg,var(--copper),transparent);width:min(860px,88%);margin:3rem 0 1.4rem;position:relative;z-index:1}.hero-meta{display:flex;gap:1.5rem;flex-wrap:wrap;position:relative;z-index:1}.hero-meta div{display:flex;gap:.45rem;align-items:baseline;border-left:1px solid rgba(255,255,255,.24);padding-left:1rem}.hero-meta b{font:1.6rem Georgia,serif;color:var(--copper)}.hero-meta span{font-size:.78rem;color:#d4d9da}.index-nav{position:sticky;top:0;z-index:10;display:flex;gap:.1rem;overflow:auto;background:rgba(240,238,232,.95);backdrop-filter:blur(12px);border-bottom:1px solid var(--line);padding:.6rem max(5vw,1rem)}.index-nav a{flex:0 0 auto;text-decoration:none;color:var(--ink);font-size:.76rem;padding:.45rem .75rem;border-radius:999px}.index-nav a:hover,.index-nav a:focus{background:var(--ink);color:#fff}.index-nav span{font-family:Georgia,serif;color:var(--copper);margin-right:.3rem}.statement{max-width:1440px;margin:0 auto;padding:7rem max(5vw,1.25rem) 4rem}.statement .section-kicker{margin:0 0 .9rem}.statement h2{font:400 clamp(2rem,4vw,4rem)/1.12 Georgia,"Noto Serif TC",serif;color:var(--ink);margin:0;letter-spacing:-.045em}.statement-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1.2rem;margin-top:3rem}.statement-grid p{margin:0;padding:1.25rem 1.3rem;border-top:2px solid var(--copper);background:rgba(255,255,255,.42);font-size:.94rem}.statement-grid b{color:var(--ink)}.notice{max-width:1320px;margin:0 auto 3rem;padding:1.3rem max(5vw,1.25rem);border-left:4px solid var(--copper);background:#e7e4db}.notice p{margin:.35rem 0;font-size:.91rem}.view-section{padding:clamp(3.5rem,7vw,6.5rem) max(5vw,1.25rem);border-top:1px solid var(--line);scroll-margin-top:58px;background:var(--paper)}.view-section:nth-of-type(odd){background:var(--paper-2)}.view-section.violet{background:linear-gradient(135deg,#fbf8ff,#f0e8f8)}.view-section.danger{background:linear-gradient(135deg,#fff9f7,#fcebea)}.view-section.gold{background:linear-gradient(135deg,#fffdf7,#fff4d9)}.view-section.green{background:linear-gradient(135deg,#f6fbf7,#eaf5ec)}.view-section.featured{background:linear-gradient(180deg,#e9f2fb,#f8f6f1 44%)}.view-head,.view-copy,.diagram-stage{max-width:1440px;margin-left:auto;margin-right:auto}.view-head{display:grid;grid-template-columns:auto 1fr auto;align-items:end;gap:1.2rem}.number{font:clamp(2.8rem,5vw,5rem)/.8 Georgia,serif;color:var(--copper);letter-spacing:-.08em}.view-head .section-kicker{margin:0 0 .35rem}.view-head h2{margin:0;color:var(--ink);font:400 clamp(2rem,4.5vw,4.2rem)/1 Georgia,"Noto Serif TC",serif;letter-spacing:-.06em}.next{font-size:.85rem;color:var(--ink);text-decoration:none;border-bottom:1px solid var(--copper);padding-bottom:.2rem;white-space:nowrap}.next:hover{color:var(--violet)}.view-copy{display:grid;grid-template-columns:1fr 1fr;gap:2rem;margin-top:2.2rem;margin-bottom:1.6rem;max-width:1080px;margin-left:max(5vw,calc((100% - 1440px)/2));margin-right:auto}.view-copy p{margin:0;font-size:1rem}.view-copy b{color:var(--ink)}.diagram-stage{margin-top:1rem;background:#fff;border:1px solid #cfd5d8;box-shadow:0 18px 38px rgba(16,25,30,.08);overflow:auto}.diagram-stage img{display:block;width:100%;min-width:960px;height:auto}.diagram-stage.tall img{min-width:980px}.diagram-stage figcaption{font-size:.78rem;color:#5d666b;padding:.75rem 1rem;border-top:1px solid #e3e6e6;background:#fff}footer{background:var(--ink);color:#f1f3f3;padding:3.2rem max(5vw,1.25rem);display:grid;gap:.8rem}footer p{margin:0;font-size:.9rem}.fineprint{max-width:720px;color:#bfc8cb;font-size:.78rem}@media(max-width:860px){.masthead{min-height:520px}.brand em{display:none}.statement{padding-top:4.5rem}.statement-grid{grid-template-columns:1fr 1fr}.view-head{grid-template-columns:auto 1fr}.view-head .next{grid-column:2;justify-self:start;margin-top:.45rem}.view-copy{grid-template-columns:1fr;margin-top:1.5rem;gap:.7rem;margin-left:auto;max-width:1440px}.diagram-stage img{min-width:900px}}@media(max-width:520px){.masthead{padding:3rem 1.25rem}.masthead h1{font-size:3rem}.eyebrow{margin-top:3.5rem}.hero-meta{gap:.8rem}.hero-meta div{padding-left:.6rem}.statement-grid{grid-template-columns:1fr}.view-section{padding:3.2rem 1rem}.view-head h2{font-size:2.25rem}.diagram-stage img{min-width:780px}.notice{margin-left:1rem;margin-right:1rem;padding:1.15rem}.index-nav{padding-left:.5rem;padding-right:.5rem}}

/* PiSuAI public-feature baseline */
.feature-rail{max-width:1440px;margin:0 auto;padding:1.3rem max(5vw,1.25rem) 5rem;display:grid;grid-template-columns:minmax(230px,.75fr) minmax(0,1.65fr);gap:3.2rem;align-items:start}.feature-intro{position:sticky;top:4.5rem}.feature-intro .section-kicker{margin:0 0 .8rem}.feature-intro h2{font:400 clamp(1.85rem,3vw,3rem)/1.1 Georgia,"Noto Serif TC",serif;color:var(--ink);letter-spacing:-.05em;margin:0 0 1.15rem}.feature-intro>p:last-child{font-size:.94rem;margin:0}.feature-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:1px;background:#d9d3c7;border:1px solid #d9d3c7}.feature-grid article{background:var(--paper-2);padding:1.35rem 1.25rem;min-height:145px}.feature-grid b{display:block;color:var(--ink);font-size:1rem;margin-bottom:.45rem}.feature-grid p{margin:0;font-size:.88rem;line-height:1.6}@media(max-width:860px){.feature-rail{grid-template-columns:1fr;padding-top:0;gap:2rem}.feature-intro{position:static}}@media(max-width:520px){.feature-rail{padding:0 1rem 3rem}.feature-grid{grid-template-columns:1fr}}