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rgba(0,0,0,0.08),0 4px 6px -4px rgba(0,0,0,0.04);--shadow-xl:0 20px 25px -5px rgba(0,0,0,0.08),0 8px 10px -6px rgba(0,0,0,0.04);--radius-sm:6px;--radius-md:10px;--radius-lg:16px}html{font-size:16px;scroll-behavior:smooth;scroll-padding-top:calc(var(--header-height)+24px)}body{font-family:var(--font-sans);color:var(--color-text);background:var(--color-bg-page);line-height:1.8;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}a{color:var(--color-primary);text-decoration:none;transition:color 0.2s,opacity 0.2s}a:hover{color:var(--color-primary-dark)}img{max-width:100%;height:auto}ul,ol{padding-left:1.5em}.container{max-width:var(--max-width);margin:0 auto;padding:48px 24px}.two-column{display:grid;grid-template-columns:1fr var(--sidebar-width);gap:48px;max-width:var(--max-width);margin:0 auto;padding:48px 24px}.content-main{min-width:0}.site-header{background:linear-gradient(135deg,var(--color-navy) 0%,var(--color-navy-light) 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span{display:block;width:22px;height:2px;background:#fff;margin:5px 0;transition:0.3s;border-radius:1px}.mobile-menu-btn.active span:nth-child(1){transform:rotate(45deg) translate(5px,5px)}.mobile-menu-btn.active span:nth-child(2){opacity:0}.mobile-menu-btn.active span:nth-child(3){transform:rotate(-45deg) translate(5px,-5px)}.breadcrumb{background:var(--color-bg);border-bottom:1px solid var(--color-border);padding:12px 24px;font-size:0.8125rem}.breadcrumb-inner{max-width:var(--max-width);margin:0 auto;display:flex;align-items:center;flex-wrap:wrap;gap:2px}.breadcrumb a{color:var(--color-text-secondary);font-weight:500}.breadcrumb a:hover{color:var(--color-primary);text-decoration:underline}.breadcrumb span{color:var(--color-text-muted);margin:0 4px;font-size:0.75rem}.breadcrumb .current{color:var(--color-text);font-weight:500}.hero-section{background:linear-gradient(150deg,#0f172a 0%,var(--color-navy) 30%,var(--color-navy-light) 70%,#1e3a5f 100%);color:#fff;padding:80px 24px 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input::placeholder{color:rgba(255,255,255,0.5)}.hero-search input:focus{outline:none;border-color:var(--color-primary);background:rgba(255,255,255,0.12);box-shadow:0 0 0 4px rgba(37,99,235,0.2)}.hero-search::before{content:'🔍';position:absolute;left:18px;top:50%;transform:translateY(-50%);font-size:1rem;opacity:0.5;z-index:1;pointer-events:none}.section-title{font-size:1.375rem;font-weight:700;margin-bottom:24px;padding-bottom:12px;border-bottom:none;display:flex;align-items:center;gap:10px;color:var(--color-text)}.section-title::before{content:'';display:inline-block;width:4px;height:24px;background:var(--color-primary);border-radius:2px;flex-shrink:0}.page-header{margin-bottom:40px}.page-header h1{font-size:2rem;font-weight:700;margin-bottom:12px;color:var(--color-text);line-height:1.4}.page-description{font-size:1.0625rem;color:var(--color-text-secondary);line-height:1.8}.featured-card{display:block;background:var(--color-bg);border:1px solid var(--color-border);border-radius:var(--radius-lg);padding:32px;transition:all 0.3s cubic-bezier(0.4,0,0.2,1);margin-bottom:48px;box-shadow:var(--shadow-sm);position:relative;overflow:hidden}.featured-card::before{content:'';position:absolute;top:0;left:0;right:0;height:4px;background:linear-gradient(90deg,var(--color-primary),var(--color-purple))}.featured-card:hover{text-decoration:none;box-shadow:var(--shadow-xl);border-color:var(--color-primary);transform:translateY(-3px)}.featured-label{display:inline-flex;align-items:center;gap:4px;background:linear-gradient(135deg,var(--color-accent),#ef4444);color:#fff;font-size:0.6875rem;font-weight:700;padding:4px 12px;border-radius:20px;margin-bottom:14px;text-transform:uppercase;letter-spacing:0.08em}.featured-card h3{font-size:1.5rem;color:var(--color-text);margin-bottom:12px;line-height:1.5;font-weight:700}.featured-card p{color:var(--color-text-secondary);margin-bottom:16px;line-height:1.8}.read-more{color:var(--color-primary);font-weight:600;font-size:0.9375rem;display:inline-flex;align-items:center;gap:4px;transition:gap 0.2s}.featured-card:hover .read-more,.article-card:hover .read-more{gap:8px}.article-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:24px;margin-bottom:48px}.article-grid.full-width{grid-template-columns:repeat(auto-fill,minmax(340px,1fr))}.article-card{background:var(--color-bg);border:1px solid var(--color-border);border-radius:var(--radius-md);padding:24px 24px 20px;transition:all 0.3s cubic-bezier(0.4,0,0.2,1);display:flex;flex-direction:column;box-shadow:var(--shadow-sm);position:relative}.article-card::after{content:'';position:absolute;bottom:0;left:16px;right:16px;height:3px;background:var(--color-primary);border-radius:3px 3px 0 0;opacity:0;transition:opacity 0.3s}.article-card:hover{text-decoration:none;box-shadow:var(--shadow-lg);border-color:transparent;transform:translateY(-4px)}.article-card:hover::after{opacity:1}.article-card .card-meta{display:flex;gap:10px;align-items:center;margin-bottom:12px;font-size:0.8125rem}.article-card .card-meta time{color:var(--color-text-muted);font-weight:500}.article-card h3{font-size:1.125rem;color:var(--color-text);margin-bottom:10px;line-height:1.6;font-weight:700}.article-card p{color:var(--color-text-secondary);font-size:0.9375rem;flex:1;line-height:1.7}.article-card .read-more{margin-top:16px;font-size:0.875rem}.category-badge{display:inline-flex;align-items:center;gap:4px;font-size:0.6875rem;font-weight:700;padding:3px 10px;border-radius:4px;letter-spacing:0.02em;text-decoration:none;background:var(--color-primary-light);color:var(--color-primary)}.category-badge:hover{text-decoration:none;opacity:0.85}.category-badge.secondary{background:#f1f5f9;color:var(--color-text-secondary)}.article-body,.glossary-body{background:var(--color-bg);border-radius:var(--radius-lg);padding:48px;box-shadow:var(--shadow-md);border:1px solid var(--color-border)}.article-header{margin-bottom:36px;padding-bottom:24px;border-bottom:1px solid var(--color-border)}.article-header h1{font-size:2rem;font-weight:700;line-height:1.5;margin-top:14px;color:var(--color-text)}.article-meta{display:flex;gap:12px;align-items:center;flex-wrap:wrap;font-size:0.875rem}.article-subtitle{font-size:1.125rem;color:var(--color-text-secondary);margin-top:12px;line-height:1.7}.updated-badge{color:var(--color-success);font-size:0.8125rem;font-weight:500}.article-content h2{font-size:1.5rem;font-weight:700;margin:56px 0 20px;padding:14px 20px;background:linear-gradient(135deg,var(--color-primary-50) 0%,#f0f4ff 100%);border-left:4px solid var(--color-primary);border-radius:0 var(--radius-sm) var(--radius-sm) 0;color:var(--color-text);line-height:1.5}.article-content h3{font-size:1.25rem;font-weight:700;margin:40px 0 16px;padding-left:14px;border-left:3px solid var(--color-teal);color:var(--color-text);line-height:1.5}.article-content h4{font-size:1.0625rem;font-weight:700;margin:32px 0 12px;color:var(--color-text);position:relative;padding-left:16px}.article-content h4::before{content:'▸';position:absolute;left:0;color:var(--color-primary);font-size:0.875rem}.article-content p{margin-bottom:20px;line-height:1.9;color:var(--color-text)}.article-content ul,.article-content ol{margin-bottom:20px}.article-content li{margin-bottom:8px;line-height:1.8;color:var(--color-text)}.article-content li::marker{color:var(--color-primary)}.article-content blockquote{border-left:4px solid var(--color-primary);background:var(--color-primary-50);padding:20px 24px;margin:28px 0;border-radius:0 var(--radius-md) var(--radius-md) 0;font-style:normal}.article-content blockquote p{color:var(--color-text-secondary)}.article-content blockquote p:last-child{margin-bottom:0}.article-content code{background:var(--color-bg-code);padding:2px 8px;border-radius:4px;font-family:var(--font-mono);font-size:0.875em;color:#be185d;border:1px solid var(--color-border)}.article-content pre{background:#0f172a;color:#e2e8f0;padding:24px;border-radius:var(--radius-md);overflow-x:auto;margin:24px 0;font-size:0.875rem;line-height:1.7;border:1px solid #1e293b}.article-content pre code{background:none;padding:0;color:inherit;border:none;font-size:inherit}.article-content table{width:100%;border-collapse:collapse;margin:28px 0;font-size:0.9375rem;border-radius:var(--radius-md);overflow:hidden;box-shadow:var(--shadow-sm);border:1px solid var(--color-border)}.article-content th{background:var(--color-navy);color:#fff;font-weight:600;padding:12px 16px;text-align:left;font-size:0.875rem;border:none}.article-content td{padding:12px 16px;text-align:left;border-bottom:1px solid var(--color-border);border-left:none;border-right:none}.article-content tr:nth-child(even) td{background:var(--color-bg-light)}.article-content tr:hover td{background:var(--color-primary-50)}.article-content strong{font-weight:700;color:var(--color-text)}.article-content a{color:var(--color-primary);text-decoration:underline;text-underline-offset:3px;text-decoration-thickness:1px}.article-content a:hover{text-decoration-thickness:2px;color:var(--color-primary-dark)}.glossary-header{margin-bottom:32px;padding-bottom:24px;border-bottom:1px solid var(--color-border)}.glossary-header h1{font-size:2rem;font-weight:700;margin-top:14px;color:var(--color-text);line-height:1.4}.glossary-summary{background:linear-gradient(135deg,var(--color-primary-50) 0%,#f0f4ff 100%);border-left:4px solid var(--color-primary);padding:20px 24px;border-radius:0 var(--radius-md) var(--radius-md) 0;margin-top:20px}.definition{font-size:1.0625rem;font-weight:500;color:var(--color-text);line-height:1.8}.pillar-link-box{background:linear-gradient(135deg,var(--color-navy) 0%,var(--color-navy-mid) 50%,#1e3a5f 100%);color:#fff;padding:32px 36px;border-radius:var(--radius-lg);margin:48px 0;position:relative;overflow:hidden}.pillar-link-box::before{content:'';position:absolute;top:-30%;right:-5%;width:40%;height:160%;background:radial-gradient(ellipse,rgba(37,99,235,0.15) 0%,transparent 70%);pointer-events:none}.pillar-link-box h3{font-size:1.25rem;margin-bottom:8px;font-weight:700;position:relative}.pillar-link-box p{opacity:0.85;margin-bottom:20px;font-size:0.9375rem;line-height:1.7;position:relative}.btn-primary{display:inline-flex;align-items:center;gap:6px;background:#fff;color:var(--color-navy);padding:12px 28px;border-radius:8px;font-weight:700;font-size:0.9375rem;transition:all 0.3s;position:relative}.btn-primary:hover{background:var(--color-primary-light);color:var(--color-primary);text-decoration:none;transform:translateX(4px)}.related-box{background:var(--color-bg-light);border:1px solid var(--color-border);border-radius:var(--radius-md);padding:28px;margin-top:36px}.related-box h3{font-size:1.0625rem;margin-bottom:16px;font-weight:700;color:var(--color-text)}.related-box ul{list-style:none;padding:0}.related-box li{margin-bottom:8px}.related-box a{font-size:0.9375rem;color:var(--color-primary);display:inline-flex;align-items:center;gap:6px}.related-box a::before{content:'→';font-size:0.75rem;color:var(--color-text-muted)}.related-box a:hover{text-decoration:underline}.glossary-nav{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:40px;padding:20px;background:var(--color-bg);border-radius:var(--radius-md);box-shadow:var(--shadow-sm);border:1px solid var(--color-border)}.glossary-nav a{display:inline-flex;align-items:center;justify-content:center;min-width:42px;height:38px;background:var(--color-bg-light);border:1px solid var(--color-border);border-radius:var(--radius-sm);font-size:0.875rem;font-weight:600;color:var(--color-text);transition:all 0.2s}.glossary-nav a:hover{background:var(--color-primary);color:#fff;border-color:var(--color-primary);text-decoration:none;box-shadow:var(--shadow-sm)}.glossary-section{margin-bottom:48px}.glossary-section h2{font-size:1.375rem;font-weight:700;color:var(--color-navy);margin-bottom:20px;padding-bottom:10px;border-bottom:2px solid var(--color-border);display:flex;align-items:center;gap:8px}.glossary-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:16px}.glossary-card{display:block;background:var(--color-bg);border:1px solid var(--color-border);border-radius:var(--radius-md);padding:20px;transition:all 0.3s cubic-bezier(0.4,0,0.2,1);box-shadow:var(--shadow-sm)}.glossary-card:hover{text-decoration:none;border-color:var(--color-primary);box-shadow:var(--shadow-md);transform:translateY(-2px)}.glossary-card h3{font-size:1rem;color:var(--color-primary);margin-bottom:8px;font-weight:700}.glossary-card p{font-size:0.875rem;color:var(--color-text-secondary);margin:0;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;line-height:1.7}.timeline{position:relative;padding-left:36px}.timeline::before{content:'';position:absolute;left:8px;top:0;bottom:0;width:3px;background:linear-gradient(to bottom,var(--color-primary),var(--color-purple));border-radius:2px}.timeline-entry{position:relative;margin-bottom:48px}.timeline-entry::before{content:'';position:absolute;left:-32px;top:8px;width:14px;height:14px;background:var(--color-primary);border:3px solid var(--color-bg-page);border-radius:50%;box-shadow:0 0 0 3px var(--color-primary)}.timeline-entry .timeline-year{font-size:0.8125rem;font-weight:700;color:var(--color-primary);margin-bottom:6px;text-transform:uppercase;letter-spacing:0.03em}.timeline-entry h2{font-size:1.375rem;font-weight:700;margin-bottom:14px;color:var(--color-text);line-height:1.4}.timeline-entry .timeline-content{background:var(--color-bg);border:1px solid var(--color-border);border-radius:var(--radius-md);padding:24px 28px;box-shadow:var(--shadow-sm);transition:box-shadow 0.2s}.timeline-entry:hover .timeline-content{box-shadow:var(--shadow-md)}.timeline-entry .timeline-content p{margin-bottom:12px;color:var(--color-text-secondary);line-height:1.8}.timeline-entry .timeline-content p:last-child{margin-bottom:0}.sidebar{position:sticky;top:calc(var(--header-height)+24px);align-self:start}.sidebar-section{background:var(--color-bg);border:1px solid var(--color-border);border-radius:var(--radius-md);padding:24px;margin-bottom:20px;box-shadow:var(--shadow-sm)}.sidebar-section h3{font-size:0.9375rem;font-weight:700;margin-bottom:16px;color:var(--color-text);display:flex;align-items:center;gap:8px;padding-bottom:10px;border-bottom:2px solid var(--color-border)}.sidebar-section ul{list-style:none;padding:0}.sidebar-section li{margin-bottom:4px}.sidebar-section li a{font-size:0.875rem;color:var(--color-text-secondary);display:block;padding:6px 10px;border-radius:var(--radius-sm);transition:all 0.2s}.sidebar-section li a:hover{color:var(--color-primary);background:var(--color-primary-50);text-decoration:none}.sidebar-section p{font-size:0.875rem;color:var(--color-text-secondary);line-height:1.7;margin-bottom:16px}.btn-outline{display:inline-flex;align-items:center;gap:4px;border:2px solid var(--color-primary);color:var(--color-primary);padding:10px 24px;border-radius:8px;font-weight:700;font-size:0.875rem;transition:all 0.2s}.btn-outline:hover{background:var(--color-primary);color:#fff;text-decoration:none}.btn-block{display:flex;justify-content:center;text-align:center;width:100%}.toc{max-height:50vh;overflow-y:auto}.toc::-webkit-scrollbar{width:3px}.toc::-webkit-scrollbar-track{background:transparent}.toc::-webkit-scrollbar-thumb{background:var(--color-border);border-radius:3px}.toc ul{list-style:none;padding:0}.toc li{margin-bottom:2px}.toc a{display:block;font-size:0.8125rem;color:var(--color-text-muted);padding:5px 12px;border-left:2px solid transparent;border-radius:0 var(--radius-sm) var(--radius-sm) 0;transition:all 0.2s;line-height:1.5}.toc a:hover{color:var(--color-primary);background:var(--color-primary-50);border-left-color:var(--color-primary);text-decoration:none}.toc a.active{color:var(--color-primary);background:var(--color-primary-50);border-left-color:var(--color-primary);font-weight:600}.toc .toc-h3{padding-left:26px;font-size:0.8rem}.algo-nav{max-height:40vh;overflow-y:auto}.algo-nav a{display:block;font-size:0.8125rem;color:var(--color-text-secondary);padding:8px 10px;border-radius:var(--radius-sm);transition:all 0.2s}.algo-nav a:hover{color:var(--color-primary);background:var(--color-primary-50);text-decoration:none}a.glossary-link{text-decoration:underline dotted;text-underline-offset:3px;text-decoration-color:var(--color-teal);color:var(--color-teal)}a.glossary-link:hover{text-decoration-style:solid;color:var(--color-primary)}.category-list{list-style:none;padding:0}.category-list li{margin-bottom:2px}.category-list a{display:flex;justify-content:space-between;align-items:center;font-size:0.875rem;color:var(--color-text-secondary);padding:8px 10px;border-radius:var(--radius-sm);transition:all 0.2s}.category-list a:hover{color:var(--color-primary);background:var(--color-primary-50);text-decoration:none}.category-list .count{font-size:0.6875rem;background:var(--color-bg-light);padding:2px 10px;border-radius:12px;color:var(--color-text-muted);font-weight:600;border:1px solid var(--color-border)}.glossary-highlights{list-style:none;padding:0}.glossary-highlights li{margin-bottom:2px}.glossary-highlights a{font-size:0.875rem;display:block;padding:8px 10px;border-radius:var(--radius-sm);color:var(--color-text-secondary);transition:all 0.2s}.glossary-highlights a:hover{color:var(--color-primary);background:var(--color-primary-50);text-decoration:none}.related-terms{list-style:none;padding:0}.related-terms li{margin-bottom:4px}.related-terms a{font-size:0.875rem;color:var(--color-text-secondary);display:block;padding:6px 10px;border-radius:var(--radius-sm);transition:all 0.2s}.related-terms a:hover{color:var(--color-primary);background:var(--color-primary-50);text-decoration:none}.category-glossary{margin-top:48px}.category-glossary h2{font-size:1.375rem;font-weight:700;margin-bottom:20px;display:flex;align-items:center;gap:10px;color:var(--color-text)}.category-glossary h2::before{content:'';display:inline-block;width:4px;height:24px;background:var(--color-teal);border-radius:2px}.site-footer{background:var(--color-navy);color:rgba(255,255,255,0.8);margin-top:0}.footer-inner{max-width:var(--max-width);margin:0 auto;padding:56px 24px 28px}.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:48px;margin-bottom:36px}.footer-col h3{color:#fff;font-size:1rem;margin-bottom:20px;font-weight:700;position:relative;padding-bottom:10px}.footer-col h3::after{content:'';position:absolute;bottom:0;left:0;width:32px;height:2px;background:var(--color-primary);border-radius:1px}.footer-col p{font-size:0.875rem;line-height:1.8}.footer-col ul{list-style:none;padding:0}.footer-col li{margin-bottom:8px}.footer-col a{color:rgba(255,255,255,0.65);font-size:0.875rem;transition:all 0.2s;display:inline-flex;align-items:center;gap:6px}.footer-col a::before{content:'›';opacity:0.5}.footer-col a:hover{color:#fff;text-decoration:none}.footer-bottom{border-top:1px solid rgba(255,255,255,0.08);padding-top:24px;text-align:center;font-size:0.8125rem;color:rgba(255,255,255,0.4)}.search-results{display:none;position:absolute;top:calc(100%+4px);left:0;right:0;max-height:400px;overflow-y:auto;background:var(--color-bg);border:1px solid var(--color-border);border-radius:var(--radius-md);box-shadow:var(--shadow-xl);z-index:200}.search-results.active{display:block}.search-results a{display:flex;align-items:center;gap:10px;padding:14px 20px;border-bottom:1px solid var(--color-border-light);color:var(--color-text);font-size:0.9375rem;transition:background 0.15s}.search-results a:hover{background:var(--color-primary-50);text-decoration:none}.search-results .search-type{font-size:0.6875rem;font-weight:700;color:var(--color-primary);background:var(--color-primary-light);padding:2px 8px;border-radius:4px;white-space:nowrap}.algorithm-section{background:var(--color-bg);border:1px solid var(--color-border);border-radius:var(--radius-lg);padding:32px;box-shadow:var(--shadow-sm)}.algorithm-section p{color:var(--color-text-secondary);margin:12px 0 20px;line-height:1.7}@media (max-width:900px){.two-column{grid-template-columns:1fr;gap:32px}.sidebar{position:static}.footer-grid{grid-template-columns:1fr;gap:32px}.article-grid{grid-template-columns:1fr}.glossary-grid{grid-template-columns:1fr}.article-body,.glossary-body{padding:32px 24px}}@media (max-width:768px){.mobile-menu-btn{display:block}.main-nav{display:none;position:absolute;top:var(--header-height);left:0;right:0;background:var(--color-navy);flex-direction:column;padding:8px 16px 16px;border-top:1px solid rgba(255,255,255,0.08);box-shadow:0 8px 16px rgba(0,0,0,0.2)}.main-nav.active{display:flex}.main-nav a{padding:12px 16px;font-size:0.9375rem}.hero-section{padding:56px 16px 64px}.hero-title{font-size:2rem}.hero-subtitle{font-size:0.9375rem}.container,.two-column{padding:32px 16px}.article-header h1,.glossary-header h1,.page-header h1{font-size:1.5rem}.article-content h2{font-size:1.25rem;padding:12px 16px;margin:40px 0 16px}.article-content h3{font-size:1.125rem}.featured-card{padding:24px}.article-body,.glossary-body{padding:24px 18px;border-radius:var(--radius-md)}.pillar-link-box{padding:24px}.site-logo::before{width:24px;height:24px}}@media print{.site-header,.site-footer,.sidebar,.breadcrumb,.hero-search{display:none}body{background:#fff;color:#000}.article-body,.glossary-body{box-shadow:none;border:none;padding:0}.two-column{grid-template-columns:1fr}}