:root{--color-bg-primary: #ffffff;--color-bg-secondary: #f8fafc;--color-bg-tertiary: #f1f5f9;--color-bg-card: #ffffff;--color-bg-hover: #f1f5f9;--color-text-primary: #0f172a;--color-text-secondary: #475569;--color-text-tertiary: #94a3b8;--color-text-inverse: #ffffff;--color-accent-primary: #6366f1;--color-accent-secondary: #8b5cf6;--color-accent-gradient: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);--color-border: #e2e8f0;--color-border-light: #f1f5f9;--color-success: #10b981;--color-warning: #f59e0b;--color-error: #ef4444;--color-news: #3b82f6;--color-tools: #10b981;--color-research: #8b5cf6;--color-policy: #f59e0b;--shadow-sm: 0 1px 2px 0 rgb(0 0 0 / .05);--shadow-md: 0 4px 6px -1px rgb(0 0 0 / .1), 0 2px 4px -2px rgb(0 0 0 / .1);--shadow-lg: 0 10px 15px -3px rgb(0 0 0 / .1), 0 4px 6px -4px rgb(0 0 0 / .1);--shadow-xl: 0 20px 25px -5px rgb(0 0 0 / .1), 0 8px 10px -6px rgb(0 0 0 / .1);--font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;--font-serif: "Playfair Display", Georgia, serif;--spacing-xs: .25rem;--spacing-sm: .5rem;--spacing-md: 1rem;--spacing-lg: 1.5rem;--spacing-xl: 2rem;--spacing-2xl: 3rem;--spacing-3xl: 4rem;--radius-sm: .375rem;--radius-md: .5rem;--radius-lg: .75rem;--radius-xl: 1rem;--radius-full: 9999px;--transition-fast: .15s ease;--transition-normal: .25s ease;--transition-slow: .35s ease;--container-max: 1280px;--container-padding: 1.5rem}[data-theme=dark]{--color-bg-primary: #0f172a;--color-bg-secondary: #1e293b;--color-bg-tertiary: #334155;--color-bg-card: #1e293b;--color-bg-hover: #334155;--color-text-primary: #f8fafc;--color-text-secondary: #cbd5e1;--color-text-tertiary: #64748b;--color-text-inverse: #0f172a;--color-border: #334155;--color-border-light: #1e293b;--shadow-sm: 0 1px 2px 0 rgb(0 0 0 / .3);--shadow-md: 0 4px 6px -1px rgb(0 0 0 / .4), 0 2px 4px -2px rgb(0 0 0 / .3);--shadow-lg: 0 10px 15px -3px rgb(0 0 0 / .4), 0 4px 6px -4px rgb(0 0 0 / .3);--shadow-xl: 0 20px 25px -5px rgb(0 0 0 / .4), 0 8px 10px -6px rgb(0 0 0 / .3)}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html{font-size:16px;scroll-behavior:smooth}body{font-family:var(--font-sans);background-color:var(--color-bg-primary);color:var(--color-text-primary);line-height:1.6;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;transition:background-color var(--transition-normal),color var(--transition-normal)}a{color:inherit;text-decoration:none}img{max-width:100%;height:auto;display:block}button{font-family:inherit;cursor:pointer;border:none;background:none}.app{min-height:100vh;display:flex;flex-direction:column}.main-content{flex:1;padding-top:var(--spacing-xl);padding-bottom:var(--spacing-3xl)}.container{width:100%;max-width:var(--container-max);margin:0 auto;padding:0 var(--container-padding)}.header{position:sticky;top:0;z-index:100;background:#fff;border-bottom:1px solid var(--color-border)}[data-theme=dark] .header{background:#0f0f14}.header-inner{display:flex;align-items:center;justify-content:space-between;height:72px;gap:var(--spacing-lg)}.logo{display:flex;align-items:center;gap:var(--spacing-sm);font-family:var(--font-serif);font-size:1.75rem;font-weight:700;background:var(--color-accent-gradient);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.logo-icon{width:36px;height:36px;animation:logo-pulse 3s ease-in-out infinite}@keyframes logo-pulse{0%,to{transform:scale(1)}50%{transform:scale(1.05)}}.logo:hover .logo-icon{animation:logo-pulse 1s ease-in-out infinite}.nav-categories{display:flex;align-items:center;gap:var(--spacing-xs)}.nav-link{padding:var(--spacing-sm) var(--spacing-md);font-size:.875rem;font-weight:500;color:var(--color-text-secondary);border-radius:var(--radius-md);transition:all var(--transition-fast)}.nav-link:hover{color:var(--color-text-primary);background:var(--color-bg-hover)}.nav-link.active{color:var(--color-accent-primary);background:#6366f11a}.nav-link-icon{font-size:1rem;margin-right:4px}.header-actions{display:flex;align-items:center;gap:var(--spacing-sm)}.icon-btn{display:flex;align-items:center;justify-content:center;width:40px;height:40px;border-radius:var(--radius-md);color:var(--color-text-secondary);transition:all var(--transition-fast)}.icon-btn:hover{color:var(--color-text-primary);background:var(--color-bg-hover)}.search-container{position:relative}.search-input{width:240px;height:40px;padding:0 var(--spacing-md) 0 40px;font-size:.875rem;color:var(--color-text-primary);background:var(--color-bg-secondary);border:1px solid var(--color-border);border-radius:var(--radius-full);transition:all var(--transition-fast)}.search-input:focus{outline:none;border-color:var(--color-accent-primary);box-shadow:0 0 0 3px #6366f11a;width:300px}.search-input::placeholder{color:var(--color-text-tertiary)}.search-icon{position:absolute;left:12px;top:50%;transform:translateY(-50%);color:var(--color-text-tertiary);pointer-events:none}.mobile-menu-btn{display:none}@media (max-width: 1024px){.nav-categories{display:none}.mobile-menu-btn{display:flex}.search-input{width:180px}.search-input:focus{width:200px}}@media (max-width: 640px){.search-container{display:none}.header-inner{height:64px}.logo{font-size:1.5rem}}.mobile-nav{display:none;position:absolute;top:100%;left:0;right:0;background:#fff;border-bottom:1px solid #e5e7eb;box-shadow:0 4px 12px #0000001a;padding:var(--spacing-md) 0;z-index:100}[data-theme=dark] .mobile-nav{background:#1a1a24;border-bottom:1px solid #2d2d3d;box-shadow:0 4px 12px #0000004d}.mobile-nav.open{display:block}.mobile-nav-link{display:block;padding:var(--spacing-md) var(--spacing-xl);font-size:1.1rem;font-weight:500;color:#374151;border-bottom:1px solid #f3f4f6}.mobile-nav-link:last-child{border-bottom:none}.mobile-nav-link:hover,.mobile-nav-link.active{background:#f9fafb;color:#111827}[data-theme=dark] .mobile-nav-link{color:#e5e7eb;border-bottom-color:#2d2d3d}[data-theme=dark] .mobile-nav-link:hover,[data-theme=dark] .mobile-nav-link.active{background:#252532;color:#fff}.mobile-nav-icon{margin-right:var(--spacing-sm);font-size:1.25rem}.hero-section{margin-bottom:var(--spacing-md)}.hero-grid{display:grid;grid-template-columns:2fr 1fr;gap:var(--spacing-md);align-items:start}.hero-main{display:flex;flex-direction:column;gap:var(--spacing-sm)}.trending-inline{display:flex;align-items:center;gap:var(--spacing-md);flex-wrap:wrap}.trending-title{display:flex;align-items:center;gap:var(--spacing-xs);font-size:.9rem;font-weight:600;color:var(--color-text-secondary);white-space:nowrap}.trending-inline .trending-tags{display:flex;flex-wrap:wrap;gap:var(--spacing-xs)}@media (max-width: 1024px){.hero-grid{grid-template-columns:1fr}}.featured-article{position:relative;border-radius:var(--radius-xl);overflow:hidden;aspect-ratio:16 / 9;cursor:pointer}.featured-article img{width:100%;height:100%;object-fit:cover;transition:transform var(--transition-slow)}.featured-article:hover img{transform:scale(1.05)}.featured-overlay{position:absolute;top:0;right:0;bottom:0;left:0;background:linear-gradient(to top,rgba(0,0,0,.9) 0%,rgba(0,0,0,.3) 50%,transparent 100%);display:flex;flex-direction:column;justify-content:flex-end;padding:var(--spacing-xl)}.featured-content{color:#fff}.featured-content .category-badge{margin-bottom:var(--spacing-md)}.featured-content h2{font-family:var(--font-serif);font-size:2.5rem;font-weight:800;line-height:1.15;margin-bottom:var(--spacing-sm);letter-spacing:-.02em}.featured-content p{font-size:1rem;opacity:.9;margin-bottom:var(--spacing-md);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}@media (max-width: 768px){.featured-article{aspect-ratio:4 / 3}.featured-overlay{padding:var(--spacing-md)}.featured-content h2{font-size:1.5rem;line-height:1.25}.featured-content p{font-size:.875rem;-webkit-line-clamp:2}.featured-content .article-info{font-size:.75rem}}.secondary-featured{display:flex;flex-direction:column;gap:var(--spacing-sm)}.secondary-article{position:relative;border-radius:var(--radius-lg);overflow:hidden;aspect-ratio:16 / 9;cursor:pointer}.secondary-article img{width:100%;height:100%;object-fit:cover;transition:transform var(--transition-slow)}.secondary-article:hover img{transform:scale(1.05)}.secondary-overlay{position:absolute;top:0;right:0;bottom:0;left:0;background:linear-gradient(to top,rgba(0,0,0,.85) 0%,transparent 70%);display:flex;flex-direction:column;justify-content:flex-end;padding:var(--spacing-lg)}.secondary-content{color:#fff}.secondary-content h3{font-size:1.25rem;font-weight:700;line-height:1.25;letter-spacing:-.01em}@media (max-width: 1024px){.secondary-featured{display:grid;grid-template-columns:repeat(2,1fr)}.secondary-article{aspect-ratio:4 / 3}}@media (max-width: 640px){.secondary-featured{grid-template-columns:1fr}}.section-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:var(--spacing-md)}.section-title{font-family:var(--font-serif);font-size:1.75rem;font-weight:700}.section-link{display:flex;align-items:center;gap:var(--spacing-xs);font-size:.875rem;font-weight:500;color:var(--color-accent-primary);transition:gap var(--transition-fast)}.section-link:hover{gap:var(--spacing-sm)}.latest-section{margin-top:var(--spacing-sm)}.latest-section .section-header{margin-bottom:var(--spacing-sm)}.article-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:var(--spacing-md)}@media (max-width: 640px){.article-grid{grid-template-columns:1fr}}.article-card{background:var(--color-bg-card);border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-sm);border:1px solid var(--color-border-light);transition:all var(--transition-normal);cursor:pointer}.article-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-xl);border-color:var(--color-accent-primary)}.article-card-image{position:relative;aspect-ratio:16 / 10;overflow:hidden}.article-card-image img{width:100%;height:100%;object-fit:cover;transition:transform var(--transition-slow)}.article-card:hover .article-card-image img{transform:scale(1.05)}.article-card-body{padding:var(--spacing-lg)}.article-card-meta{display:flex;align-items:center;gap:var(--spacing-sm);margin-bottom:var(--spacing-sm)}.article-card h3{font-size:1.2rem;font-weight:700;line-height:1.35;margin-bottom:var(--spacing-sm);letter-spacing:-.01em;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.article-card p{font-size:.875rem;color:var(--color-text-secondary);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;margin-bottom:var(--spacing-md)}.article-card-footer{display:flex;align-items:center;justify-content:space-between}.article-info{display:flex;align-items:center;gap:var(--spacing-md);font-size:.75rem;color:var(--color-text-tertiary)}.article-info span{display:flex;align-items:center;gap:var(--spacing-xs)}.bookmark-btn{color:var(--color-text-tertiary);transition:color var(--transition-fast)}.bookmark-btn:hover,.bookmark-btn.active{color:var(--color-accent-primary)}.category-badge{display:inline-flex;align-items:center;padding:var(--spacing-xs) var(--spacing-sm);font-size:.75rem;font-weight:600;text-transform:uppercase;letter-spacing:.05em;border-radius:var(--radius-sm);color:#fff}.category-badge.news{background:var(--color-news)}.category-badge.tools{background:var(--color-tools)}.category-badge.research{background:var(--color-research)}.category-badge.policy{background:var(--color-policy)}.article-page{max-width:800px;margin:0 auto}.article-header{margin-bottom:var(--spacing-xl)}.article-breadcrumb{display:flex;align-items:center;gap:var(--spacing-sm);font-size:.875rem;color:var(--color-text-tertiary);margin-bottom:var(--spacing-lg)}.article-breadcrumb a{color:var(--color-text-secondary);transition:color var(--transition-fast)}.article-breadcrumb a:hover{color:var(--color-accent-primary)}.article-title{font-family:var(--font-serif);font-size:2.5rem;font-weight:700;line-height:1.2;margin-bottom:var(--spacing-md)}@media (max-width: 768px){.article-title{font-size:1.875rem}}.article-subtitle{font-size:1.25rem;color:var(--color-text-secondary);line-height:1.5;margin-bottom:var(--spacing-lg)}.article-meta-bar{display:flex;align-items:center;flex-wrap:wrap;gap:var(--spacing-lg);padding:var(--spacing-md) 0;border-top:1px solid var(--color-border);border-bottom:1px solid var(--color-border)}.article-author{display:flex;align-items:center;gap:var(--spacing-sm)}.author-avatar{width:40px;height:40px;border-radius:var(--radius-full);background:var(--color-accent-gradient);display:flex;align-items:center;justify-content:center;color:#fff;font-weight:600;font-size:.875rem}.author-info{display:flex;flex-direction:column}.author-name{font-weight:600;font-size:.875rem}.article-date{font-size:.75rem;color:var(--color-text-tertiary)}.article-stats{display:flex;align-items:center;gap:var(--spacing-md);margin-left:auto;font-size:.875rem;color:var(--color-text-secondary)}.article-stats span{display:flex;align-items:center;gap:var(--spacing-xs)}.article-controls{background:var(--color-bg-secondary);border-radius:var(--radius-lg);padding:var(--spacing-lg);margin-bottom:var(--spacing-xl)}.controls-header{display:flex;align-items:center;gap:var(--spacing-sm);margin-bottom:var(--spacing-md);font-weight:600;color:var(--color-text-secondary)}.control-group{display:flex;flex-direction:column;gap:var(--spacing-sm)}.control-group+.control-group{margin-top:var(--spacing-lg);padding-top:var(--spacing-lg);border-top:1px solid var(--color-border)}.control-label{font-size:.875rem;font-weight:500;color:var(--color-text-secondary)}.toggle-group{display:flex;background:var(--color-bg-primary);border-radius:var(--radius-md);padding:4px;gap:4px}.toggle-btn{flex:1;padding:var(--spacing-sm) var(--spacing-md);font-size:.875rem;font-weight:500;color:var(--color-text-secondary);border-radius:var(--radius-sm);transition:all var(--transition-fast)}.toggle-btn:hover{color:var(--color-text-primary)}.toggle-btn.active{background:var(--color-accent-gradient);color:#fff;box-shadow:var(--shadow-sm)}.article-image{border-radius:var(--radius-lg);overflow:hidden;margin-bottom:var(--spacing-xl)}.article-image img{width:100%;aspect-ratio:16 / 9;object-fit:cover}.image-caption{padding:var(--spacing-sm) 0;font-size:.875rem;color:var(--color-text-tertiary);font-style:italic}.article-content{font-size:1.125rem;line-height:1.8;color:var(--color-text-primary)}.article-content p{margin-bottom:var(--spacing-lg)}.article-content h2{font-family:var(--font-serif);font-size:1.5rem;font-weight:700;margin-top:var(--spacing-2xl);margin-bottom:var(--spacing-md)}.article-content blockquote{border-left:4px solid var(--color-accent-primary);padding-left:var(--spacing-lg);margin:var(--spacing-xl) 0;font-style:italic;color:var(--color-text-secondary)}.article-content ul,.article-content ol{margin:var(--spacing-lg) 0;padding-left:var(--spacing-xl)}.article-content li{margin-bottom:var(--spacing-sm)}.article-footer{margin-top:var(--spacing-2xl);padding-top:var(--spacing-xl);border-top:1px solid var(--color-border)}.article-tags{display:flex;flex-wrap:wrap;gap:var(--spacing-sm);margin-bottom:var(--spacing-xl)}.tag{padding:var(--spacing-xs) var(--spacing-md);font-size:.875rem;color:var(--color-text-secondary);background:var(--color-bg-secondary);border-radius:var(--radius-full);transition:all var(--transition-fast)}.tag:hover{color:var(--color-accent-primary);background:#6366f11a}.share-section{display:flex;align-items:center;gap:var(--spacing-md)}.share-section span{font-weight:500;color:var(--color-text-secondary)}.share-buttons{display:flex;gap:var(--spacing-sm)}.share-btn{display:flex;align-items:center;justify-content:center;width:40px;height:40px;border-radius:var(--radius-md);color:var(--color-text-secondary);background:var(--color-bg-secondary);transition:all var(--transition-fast)}.share-btn:hover{color:#fff;background:var(--color-accent-primary)}.related-section{margin-top:var(--spacing-3xl)}.search-page{max-width:900px;margin:0 auto}.search-header{margin-bottom:var(--spacing-2xl)}.search-header h1{font-family:var(--font-serif);font-size:2rem;margin-bottom:var(--spacing-lg)}.search-form{position:relative}.search-form input{width:100%;height:56px;padding:0 var(--spacing-lg) 0 56px;font-size:1.125rem;background:var(--color-bg-secondary);border:2px solid var(--color-border);border-radius:var(--radius-lg);transition:all var(--transition-fast)}.search-form input:focus{outline:none;border-color:var(--color-accent-primary)}.search-form .search-icon{left:var(--spacing-lg)}.search-results-count{color:var(--color-text-secondary);margin-bottom:var(--spacing-xl)}.category-header{margin-bottom:var(--spacing-xl);padding-bottom:var(--spacing-xl);border-bottom:1px solid var(--color-border);text-align:center}.category-header-icon{display:block;font-size:3rem;margin-bottom:var(--spacing-sm)}.category-header h1{font-family:var(--font-serif);font-size:2.5rem;margin-bottom:var(--spacing-sm)}.category-description{font-size:1.125rem;color:var(--color-text-secondary);max-width:500px;margin:0 auto}.category-nav{display:flex;justify-content:center;flex-wrap:wrap;gap:var(--spacing-sm);margin-bottom:var(--spacing-2xl)}.category-nav-link{display:inline-flex;align-items:center;gap:6px;padding:var(--spacing-sm) var(--spacing-md);font-size:.875rem;font-weight:500;color:var(--color-text-secondary);background:var(--color-bg-secondary);border:1px solid var(--color-border);border-radius:var(--radius-full);transition:all var(--transition-fast)}.category-nav-link:hover{color:var(--color-text-primary);border-color:var(--color-accent-primary)}.category-nav-link.active{background:var(--color-accent-gradient);color:#fff;border-color:transparent}.newsletter-section{background:var(--color-accent-gradient);border-radius:var(--radius-xl);padding:var(--spacing-2xl) var(--spacing-xl);margin-top:var(--spacing-3xl);text-align:center;color:#fff;position:relative;overflow:hidden}.newsletter-section:before{content:"";position:absolute;top:-50%;left:-50%;width:200%;height:200%;background:radial-gradient(circle,rgba(255,255,255,.1) 0%,transparent 60%);animation:newsletter-shimmer 15s linear infinite}@keyframes newsletter-shimmer{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.newsletter-badge{display:inline-flex;align-items:center;gap:6px;padding:var(--spacing-xs) var(--spacing-md);background:#fff3;border-radius:var(--radius-full);font-size:.75rem;font-weight:600;text-transform:uppercase;letter-spacing:.05em;margin-bottom:var(--spacing-md);position:relative}.newsletter-section h2{font-family:var(--font-serif);font-size:2rem;margin-bottom:var(--spacing-sm);position:relative}.newsletter-section>p{opacity:.9;margin-bottom:var(--spacing-lg);max-width:500px;margin-left:auto;margin-right:auto;position:relative}.newsletter-form{display:flex;gap:var(--spacing-sm);max-width:440px;margin:0 auto;position:relative}.newsletter-input-wrapper{flex:1;position:relative;display:flex;align-items:center}.newsletter-input-wrapper svg{position:absolute;left:var(--spacing-md);color:var(--color-text-tertiary);pointer-events:none}.newsletter-form input{width:100%;height:52px;padding:0 var(--spacing-md) 0 48px;border:2px solid transparent;border-radius:var(--radius-lg);font-size:.9375rem;background:#fff;color:var(--color-text-primary);transition:all var(--transition-fast)}.newsletter-form input:focus{outline:none;border-color:#ffffff80;box-shadow:0 0 0 4px #fff3}.newsletter-form input::placeholder{color:var(--color-text-tertiary)}.newsletter-form button{height:52px;padding:0 var(--spacing-xl);background:#fff;color:var(--color-accent-primary);font-weight:700;font-size:.9375rem;border-radius:var(--radius-lg);transition:all var(--transition-fast);white-space:nowrap}.newsletter-form button:hover{transform:scale(1.02);box-shadow:0 4px 12px #00000026}.newsletter-note{font-size:.75rem;opacity:.7;margin-top:var(--spacing-md);position:relative}.newsletter-success{padding:var(--spacing-lg) 0;position:relative}.newsletter-success svg{margin-bottom:var(--spacing-md);animation:success-bounce .5s ease-out}@keyframes success-bounce{0%{transform:scale(0)}50%{transform:scale(1.2)}to{transform:scale(1)}}.newsletter-success h2{margin-bottom:var(--spacing-sm)}.newsletter-success p{opacity:.9}@media (max-width: 480px){.newsletter-form{flex-direction:column}.newsletter-section h2{font-size:1.5rem}}.footer{background:var(--color-bg-secondary);border-top:1px solid var(--color-border);padding:var(--spacing-3xl) 0 var(--spacing-xl)}.footer-grid{display:grid;grid-template-columns:2fr repeat(3,1fr);gap:var(--spacing-2xl);margin-bottom:var(--spacing-2xl)}@media (max-width: 768px){.footer-grid{grid-template-columns:repeat(2,1fr)}}@media (max-width: 480px){.footer-grid{grid-template-columns:1fr}}.footer-brand .logo{margin-bottom:var(--spacing-md)}.footer-brand>p{color:var(--color-text-secondary);font-size:.875rem;line-height:1.6;margin-bottom:var(--spacing-md)}.footer-brand .footer-social{justify-content:flex-start;gap:var(--spacing-sm)}.footer-icon{margin-right:6px}.footer-column h4{font-weight:600;margin-bottom:var(--spacing-md)}.footer-column ul{list-style:none}.footer-column li{margin-bottom:var(--spacing-sm)}.footer-column a{font-size:.875rem;color:var(--color-text-secondary);transition:color 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var(--spacing-md);font-size:.875rem;font-weight:500;color:var(--color-text-secondary);background:var(--color-bg-secondary);border:1px solid var(--color-border);border-radius:var(--radius-full);transition:all var(--transition-fast)}.trending-tag:hover{color:var(--color-accent-primary);border-color:var(--color-accent-primary);background:#6366f11a;transform:translateY(-2px)}.trending-tag.hot{color:var(--color-text-primary);border-color:var(--color-warning);background:#f59e0b1a}.trending-tag.hot:hover{background:#f59e0b33;border-color:var(--color-warning);color:var(--color-warning)}.hot-indicator{width:6px;height:6px;background:var(--color-warning);border-radius:50%;animation:hot-pulse 1.5s ease-in-out infinite}@keyframes hot-pulse{0%,to{transform:scale(1);opacity:1}50%{transform:scale(1.3);opacity:.7}}.categories-section{margin-top:var(--spacing-3xl)}.category-cards{display:grid;grid-template-columns:repeat(4,1fr);gap:var(--spacing-md)}@media (max-width: 900px){.category-cards{grid-template-columns:repeat(2,1fr)}}@media (max-width: 500px){.category-cards{grid-template-columns:1fr}}.category-card{position:relative;padding:var(--spacing-lg);background:var(--color-bg-card);border-radius:var(--radius-lg);border:1px solid var(--color-border);transition:all var(--transition-normal);overflow:hidden}.category-card:before{content:"";position:absolute;top:0;left:0;right:0;height:3px;background:var(--category-color);transform:scaleX(0);transition:transform var(--transition-normal)}.category-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:var(--category-color)}.category-card:hover:before{transform:scaleX(1)}.category-card-news{--category-color: var(--color-news)}.category-card-tools{--category-color: var(--color-tools)}.category-card-research{--category-color: var(--color-research)}.category-card-policy{--category-color: 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