:root{--bg: #faf9f6;--panel: #ffffff;--text: #1f2933;--muted: #667085;--subtle: #8a8f98;--line: #e5e2da;--accent: #6b7a5f;--accent-dark: #495640;--soft: #f1efe8;--warning-bg: #f7f3ea;--max: 1120px;--radius: 18px;--shadow: 0 18px 45px rgba(31, 41, 51, .08)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,PingFang SC,Hiragino Sans GB,Microsoft YaHei,Noto Sans CJK SC,Arial,sans-serif;background:var(--bg);color:var(--text);line-height:1.75;letter-spacing:.01em}a{color:inherit;text-decoration:none}.container{width:min(var(--max),calc(100% - 40px));margin:0 auto}header{position:sticky;top:0;z-index:50;-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);background:#faf9f6db;border-bottom:1px solid rgba(229,226,218,.82)}.nav{height:72px;display:flex;align-items:center;justify-content:space-between;gap:24px}.brand{display:flex;align-items:baseline;gap:10px;font-weight:700;letter-spacing:.02em;white-space:nowrap}.brand span:first-child{font-size:18px}.brand span:last-child{color:var(--muted);font-size:14px;font-weight:500}nav ul{display:flex;gap:22px;align-items:center;list-style:none;padding:0;margin:0;color:var(--muted);font-size:14px}nav a:hover{color:var(--accent-dark)}.lang{padding:7px 12px;border:1px solid var(--line);border-radius:999px;background:#fff9}.hero{padding:92px 0 72px;position:relative;overflow:hidden}.hero:before{content:"";position:absolute;right:-120px;top:-80px;width:420px;height:420px;background:radial-gradient(circle,rgba(107,122,95,.16),rgba(107,122,95,.02) 62%,transparent 70%);pointer-events:none}.hero-grid{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(300px,.9fr);gap:54px;align-items:center;position:relative}.eyebrow{color:var(--accent-dark);font-weight:700;letter-spacing:.14em;text-transform:uppercase;font-size:12px;margin-bottom:18px}h1{margin:0 0 18px;line-height:1.12;font-size:clamp(42px,7vw,74px);letter-spacing:-.055em}.hero h1 .zh{display:block;font-size:clamp(34px,5vw,58px);letter-spacing:-.035em;margin-top:6px;color:#2d342b}.download-hero h1 .zh{display:block;font-size:clamp(28px,4vw,44px);letter-spacing:-.03em;margin-top:10px;color:#2d342b}.article-hero{padding:72px 0 34px;border-bottom:1px solid var(--line);background:linear-gradient(180deg,#f1efe8b8,#faf9f600)}.article-hero .container{max-width:900px}.article-hero h1{margin-bottom:16px;font-size:clamp(38px,6vw,68px)}.article-hero p{max-width:720px;color:var(--muted);font-size:17px;margin:0}.article-wrap{padding:46px 0 78px}.article-actions{width:min(860px,calc(100% - 40px));margin:0 auto 26px}.research-article{width:min(860px,calc(100% - 40px));margin:0 auto}.research-section{margin-top:44px}.research-section:first-child{margin-top:0}.research-article h2{margin:0 0 20px;padding-bottom:12px;border-bottom:1px solid var(--line);font-size:clamp(25px,3vw,34px);line-height:1.35;letter-spacing:0}.research-article h3{margin:34px 0 12px;color:var(--accent-dark);font-size:21px;line-height:1.45;letter-spacing:0}.research-article p{margin:0 0 16px;color:#344054;font-size:17px;line-height:1.95}.subtitle{font-size:clamp(19px,2.2vw,25px);line-height:1.55;color:#313a43;margin:0 0 20px;max-width:760px}.lead{color:var(--muted);font-size:17px;max-width:760px;margin:0 0 32px}.actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px}.btn{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:11px 18px;border-radius:999px;border:1px solid var(--line);font-weight:700;font-size:14px;transition:transform .18s ease,box-shadow .18s ease,background .18s ease}.btn:hover{transform:translateY(-1px);box-shadow:0 10px 22px #1f293314}.btn.primary{background:var(--accent);color:#fff;border-color:var(--accent)}.btn.secondary{background:#ffffffb8}.model-card{background:#ffffffc7;border:1px solid var(--line);border-radius:28px;padding:26px;box-shadow:var(--shadow)}.model-card h2{margin:0 0 16px;font-size:20px;letter-spacing:-.02em}.flow{display:grid;gap:10px;margin:22px 0}.flow-item{display:flex;align-items:center;justify-content:space-between;gap:16px;border:1px solid var(--line);background:#fff;border-radius:14px;padding:13px 15px;font-size:14px}.flow-item strong{font-size:15px}.arrow{text-align:center;color:var(--accent);font-weight:800;line-height:1}.note{color:var(--muted);font-size:14px;margin:14px 0 0}.visual-intro{padding:0 0 62px;border-top:0}.visual-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px;align-items:stretch;max-width:1120px}.visual-card{margin:0;overflow:hidden;background:#ffffffc7;border:1px solid var(--line);border-radius:24px;box-shadow:var(--shadow)}.visual-card img{display:block;width:100%;height:420px;object-fit:contain;padding:14px}.visual-zoom{display:block;width:100%;padding:0;border:0;background:transparent;cursor:zoom-in}.visual-zoom:hover img,.visual-zoom:focus-visible img{transform:scale(1.02)}.visual-zoom img{transition:transform .2s ease}body.lightbox-open{overflow:hidden}.image-lightbox{position:fixed;top:0;right:0;bottom:0;left:0;z-index:200;display:grid;place-items:center;padding:24px}.lightbox-backdrop{position:absolute;top:0;right:0;bottom:0;left:0;border:0;background:#12181fc7;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);cursor:zoom-out}.lightbox-panel{position:relative;z-index:1;display:grid;grid-template-columns:52px minmax(0,1fr) 52px;align-items:center;width:min(1180px,100%);min-height:min(760px,calc(100vh - 48px));gap:14px}.lightbox-figure{margin:0;display:grid;gap:12px;justify-items:center}.lightbox-figure img{display:block;max-width:100%;max-height:calc(100vh - 132px);object-fit:contain;background:#fff;border:1px solid rgba(255,255,255,.2);border-radius:18px;box-shadow:0 24px 70px #00000052}.lightbox-figure figcaption{color:#ffffffdb;font-size:14px;text-align:center}.lightbox-close,.lightbox-nav{display:inline-grid;place-items:center;width:44px;height:44px;border:1px solid rgba(255,255,255,.22);border-radius:999px;color:#fff;background:#ffffff1a;cursor:pointer;transition:background .18s ease,transform .18s ease}.lightbox-close:hover,.lightbox-nav:hover,.lightbox-close:focus-visible,.lightbox-nav:focus-visible{background:#ffffff2e;transform:translateY(-1px)}.lightbox-close{position:absolute;top:0;right:0;z-index:2}.lightbox-nav.previous{justify-self:end}.lightbox-nav.next{justify-self:start}.download-hero{padding:88px 0 66px;position:relative;overflow:hidden}.download-hero:before{content:"";position:absolute;right:-140px;top:-120px;width:460px;height:460px;background:radial-gradient(circle,rgba(107,122,95,.15),rgba(107,122,95,.02) 62%,transparent 70%);pointer-events:none}.download-hero-grid{display:grid;grid-template-columns:minmax(0,1.08fr) minmax(280px,.72fr);gap:44px;align-items:center;position:relative}.download-panel{background:#ffffffd1;border:1px solid var(--line);border-radius:28px;padding:28px;box-shadow:var(--shadow)}.download-panel h2{margin-bottom:12px;font-size:24px}.download-panel p{color:var(--muted);margin:0 0 22px}.download-panel dl{display:grid;gap:12px;margin:0}.download-panel dl div{display:flex;align-items:center;justify-content:space-between;gap:16px;border-top:1px solid var(--line);padding-top:12px}.download-panel dt{color:var(--muted);font-size:14px;font-weight:700}.download-panel dd{margin:0;font-weight:800}.download-summary{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}.book-toc{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin:0;padding:0;list-style:none;counter-reset:book}.book-toc li{counter-increment:book;display:grid;gap:6px;background:#ffffffc7;border:1px solid var(--line);border-radius:16px;padding:16px 18px}.book-toc span{color:var(--accent-dark);font-size:12px;font-weight:900;letter-spacing:.08em;text-transform:uppercase}.book-toc strong{font-size:16px;line-height:1.45}section{padding:62px 0;border-top:1px solid rgba(229,226,218,.72)}.section-head{display:grid;grid-template-columns:minmax(0,.8fr) minmax(0,1.2fr);gap:42px;align-items:start;margin-bottom:34px}.section-kicker{color:var(--accent-dark);font-size:13px;text-transform:uppercase;letter-spacing:.12em;font-weight:800;margin-bottom:10px}h2{font-size:clamp(28px,4vw,42px);line-height:1.2;margin:0;letter-spacing:-.04em}.section-head p{margin:0;color:var(--muted);font-size:17px}.cards{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}.card{background:#ffffffc7;border:1px solid var(--line);border-radius:var(--radius);padding:22px}.card h3{margin:0 0 8px;font-size:19px;letter-spacing:-.02em}.card .en{color:var(--accent);font-size:12px;font-weight:800;letter-spacing:.12em;text-transform:uppercase;margin-bottom:10px}.card p{margin:0;color:var(--muted);font-size:15px}.boundary{background:var(--warning-bg);border:1px solid #e7ddc9;border-radius:26px;padding:30px;display:grid;grid-template-columns:minmax(0,.85fr) minmax(0,1.15fr);gap:34px;align-items:start}.boundary h2{font-size:clamp(25px,3vw,36px)}.boundary ul,.research-list,.hypotheses,.outputs,.reading-list{margin:0;padding:0;list-style:none}.boundary li{margin-bottom:14px;color:#4c4a43}.boundary li:before{content:"—";color:var(--accent);margin-right:8px;font-weight:800}.smmc{display:grid;grid-template-columns:minmax(0,.95fr) minmax(300px,1.05fr);gap:32px;align-items:stretch}.definition{background:var(--panel);border:1px solid var(--line);border-radius:28px;padding:30px;box-shadow:var(--shadow)}.definition h3{margin:0 0 12px;font-size:24px;letter-spacing:-.03em}.definition blockquote{margin:22px 0;padding:18px 20px;border-left:4px solid var(--accent);background:var(--soft);border-radius:0 14px 14px 0;font-size:18px;line-height:1.7}.definition p{color:var(--muted)}.pill-list{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}.pill{border:1px solid var(--line);background:#fff;border-radius:999px;padding:7px 11px;color:#4f5a64;font-size:13px;font-weight:700}.research-list{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px;counter-reset:step}.research-list li{counter-increment:step;background:#ffffffc7;border:1px solid var(--line);border-radius:18px;padding:20px}.research-list li:before{content:counter(step,decimal-leading-zero);display:inline-flex;width:34px;height:34px;align-items:center;justify-content:center;border-radius:50%;background:var(--soft);color:var(--accent-dark);font-size:12px;font-weight:900;margin-bottom:16px}.research-list h3{margin:0 0 10px;font-size:18px}.research-list p{margin:0;color:var(--muted);font-size:14px}.hypotheses{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;counter-reset:hypo}.hypotheses li{counter-increment:hypo;background:#fff;border:1px solid var(--line);border-radius:18px;padding:22px}.hypotheses li:before{content:"H" counter(hypo);display:inline-block;color:var(--accent-dark);font-weight:900;font-size:13px;letter-spacing:.08em;margin-bottom:10px}.hypotheses h3{margin:0 0 8px;font-size:18px}.hypotheses p{margin:0;color:var(--muted);font-size:15px}.outputs{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:14px}.outputs li{background:#fff;border:1px solid var(--line);border-radius:18px;padding:18px;min-height:160px}.outputs h3{margin:0 0 8px;font-size:17px;letter-spacing:-.02em}.tag{display:inline-flex;font-size:12px;color:var(--accent-dark);background:var(--soft);border-radius:999px;padding:4px 8px;margin-bottom:12px;font-weight:800}.outputs p{color:var(--muted);font-size:14px;margin:0}.reading-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.reading-list a{display:flex;align-items:center;justify-content:space-between;gap:16px;background:#ffffffbd;border:1px solid var(--line);border-radius:16px;padding:16px 18px;font-weight:700}.reading-list a:hover{border-color:#6b7a5f73;background:#fff}.reading-list span{color:var(--accent);font-weight:900}.cta{background:#1f2933;color:#fff;border-radius:30px;padding:36px;display:grid;grid-template-columns:minmax(0,1.1fr) minmax(260px,.9fr);gap:28px;align-items:center}.cta h2{color:#fff;font-size:clamp(27px,3.5vw,40px)}.cta p{color:#ffffffbd;margin:14px 0 0}.file-hash{display:grid;gap:6px;margin-top:18px}.file-hash span{color:#ffffffb8;font-size:12px;font-weight:700;letter-spacing:.08em;text-transform:uppercase}.file-hash code{color:#fff;font-family:ui-monospace,SFMono-Regular,Consolas,Liberation Mono,monospace;font-size:13px;line-height:1.6;overflow-wrap:anywhere}.cta .btn{border-color:#ffffff38;color:#fff}.cta .btn.primary{background:#fff;color:#1f2933;border-color:#fff}footer{padding:42px 0;color:var(--muted);border-top:1px solid var(--line);font-size:14px}.footer-grid{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:28px;align-items:start}.footer-links{display:flex;flex-wrap:wrap;gap:14px}.disclaimer{margin-top:18px;max-width:760px;color:var(--subtle);font-size:13px}.icp{margin-top:12px;color:var(--subtle);font-size:13px}@media(max-width:900px){nav ul{display:none}.hero-grid,.visual-grid,.download-hero-grid,.download-summary,.section-head,.boundary,.smmc,.cta,.footer-grid{grid-template-columns:1fr}.cards,.research-list,.book-toc,.outputs{grid-template-columns:repeat(2,minmax(0,1fr))}}@media(max-width:620px){.container{width:min(100% - 28px,var(--max))}.hero,.download-hero{padding:64px 0 48px}.visual-intro{padding-bottom:46px}.visual-card img{height:340px}.image-lightbox{padding:14px}.lightbox-panel{grid-template-columns:1fr 1fr;grid-template-rows:1fr auto;min-height:calc(100vh - 28px);gap:12px}.lightbox-figure{grid-column:1 / -1}.lightbox-figure img{max-height:calc(100vh - 138px);border-radius:14px}.lightbox-nav.previous,.lightbox-nav.next{justify-self:center}section{padding:46px 0}.cards,.research-list,.hypotheses,.outputs,.book-toc,.reading-list{grid-template-columns:1fr}.model-card,.definition,.download-panel,.boundary,.cta{padding:22px;border-radius:22px}.actions{flex-direction:column}.btn{width:100%}}