:root{--bg-primary:#ffffff;--bg-secondary:#f8fafc;--bg-tertiary:#f1f5f9;--bg-card:#ffffff;--text-primary:#0f172a;--text-secondary:#475569;--text-tertiary:#94a3b8;--border-color:#e2e8f0;--accent:#3b82f6;--accent-hover:#2563eb;--accent-light:#eff6ff;--gradient-start:#3b82f6;--gradient-end:#8b5cf6;--success:#10b981;--warning:#f59e0b;--danger:#ef4444;--shadow-sm:0 1px 2px rgba(0,0,0,0.05);--shadow-md:0 4px 6px -1px rgba(0,0,0,0.1),0 2px 4px -2px rgba(0,0,0,0.1);--shadow-lg:0 10px 15px -3px rgba(0,0,0,0.1),0 4px 6px -4px rgba(0,0,0,0.1);--shadow-xl:0 20px 25px -5px rgba(0,0,0,0.1),0 8px 10px -6px rgba(0,0,0,0.1);--radius-sm:6px;--radius-md:10px;--radius-lg:16px;--radius-xl:24px;--transition:0.2s ease}[data-theme="dark"]{--bg-primary:#0f172a;--bg-secondary:#1e293b;--bg-tertiary:#334155;--bg-card:#1e293b;--text-primary:#f1f5f9;--text-secondary:#cbd5e1;--text-tertiary:#64748b;--border-color:#334155;--accent:#60a5fa;--accent-hover:#3b82f6;--accent-light:#1e3a5f;--shadow-sm:0 1px 2px rgba(0,0,0,0.3);--shadow-md:0 4px 6px -1px rgba(0,0,0,0.4);--shadow-lg:0 10px 15px -3px rgba(0,0,0,0.4);--shadow-xl:0 20px 25px -5px rgba(0,0,0,0.4)}*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}html{scroll-behavior:smooth;font-size:16px}body{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI','PingFang SC','Hiragino Sans GB','Microsoft YaHei',sans-serif;background:var(--bg-secondary);color:var(--text-primary);line-height:1.7;transition:background var(--transition),color var(--transition);min-height:100vh}a{color:var(--accent);text-decoration:none;transition:color var(--transition)}a:hover{color:var(--accent-hover)}img{max-width:100%;height:auto;display:block}.container{max-width:1200px;margin:0 auto;padding:0 20px}.navbar{background:var(--bg-primary);border-bottom:1px solid var(--border-color);position:sticky;top:0;z-index:1000;backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);transition:background var(--transition),border-color var(--transition)}.navbar .container{display:flex;align-items:center;justify-content:space-between;height:60px}.logo{display:flex;align-items:center;gap:10px;font-size:1.7rem;font-weight:800;color:var(--text-primary);letter-spacing:-0.5px;user-select:none}.logo-subtitle{font-size:0.7rem;font-weight:300;color:var(--text-tertiary);letter-spacing:0.5px;padding-left:8px;border-left:1px solid var(--border-color);white-space:nowrap}.nav-links{display:flex;align-items:center;gap:8px;list-style:none}.nav-links a{padding:8px 16px;border-radius:var(--radius-sm);color:var(--text-secondary);font-size:0.9rem;font-weight:500;transition:all var(--transition);background:transparent;position:relative}.nav-links a:visited,.nav-links a:focus,.nav-links a:focus-visible{background:transparent;color:var(--text-secondary);outline:none}.nav-links a:hover{color:var(--accent)}.nav-links a.active{color:var(--accent);border-bottom:2px solid var(--accent);padding-bottom:6px;border-radius:0}.nav-links a.active:focus,.nav-links a.active:focus-visible{background:var(--accent-light);color:var(--accent);outline:none}.nav-actions{display:flex;align-items:center;gap:12px}.theme-toggle{background:none;border:1px solid var(--border-color);border-radius:var(--radius-sm);padding:8px 12px;cursor:pointer;color:var(--text-secondary);font-size:1.1rem;transition:all var(--transition);display:flex;align-items:center}.theme-toggle:hover{border-color:var(--accent);color:var(--accent)}.lang-switcher{display:flex;align-items:center;gap:4px}.lang-btn{background:none;border:none;padding:4px 6px;cursor:pointer;color:var(--text-tertiary);font-size:0.8rem;font-weight:500;border-radius:4px;transition:all var(--transition);font-family:inherit}.lang-btn:hover{color:var(--text-primary)}.lang-btn.active{color:var(--accent);font-weight:700}.lang-separator{color:var(--border-color);font-size:0.75rem;user-select:none}.mobile-menu-btn{display:none;background:none;border:none;font-size:1.5rem;cursor:pointer;color:var(--text-primary);padding:4px}.hero{background:linear-gradient(135deg,#1e40af 0%,#3b82f6 40%,#8b5cf6 100%);color:#fff;padding:80px 0;text-align:center;position:relative;overflow:hidden}.hero::before{content:'';position:absolute;top:0;left:0;right:0;bottom:0;background-image:radial-gradient(circle,rgba(255,255,255,0.08) 1px,transparent 1px);background-size:24px 24px;pointer-events:none}.hero::after{content:'';position:absolute;top:-50%;left:-50%;width:200%;height:200%;background:radial-gradient(circle at 30% 50%,rgba(255,255,255,0.12) 0%,transparent 50%);animation:heroPulse 8s ease-in-out infinite}@keyframes heroPulse{0%,100%{transform:translate(0,0)}50%{transform:translate(5%,5%)}}.hero .container{position:relative;z-index:1}.hero h1{font-size:3.2rem;font-weight:800;margin-bottom:16px;letter-spacing:-1px;line-height:1.2;text-shadow:0 0 40px rgba(139,92,246,0.5),0 0 80px rgba(59,130,246,0.3)}.hero p{font-size:1.15rem;opacity:0.9;max-width:600px;margin:0 auto 36px}.search-box{display:flex;max-width:560px;margin:0 auto;background:rgba(255,255,255,0.18);backdrop-filter:blur(10px);border-radius:60px;overflow:hidden;border:1px solid rgba(255,255,255,0.25);box-shadow:0 4px 24px rgba(0,0,0,0.15)}.search-box input{flex:1;padding:16px 28px;border:none;background:transparent;color:#fff;font-size:1rem;outline:none}.search-box input::placeholder{color:rgba(255,255,255,0.6)}.search-box button{padding:16px 32px;border:none;background:#fff;color:#3b82f6;font-weight:600;cursor:pointer;font-size:0.95rem;transition:all var(--transition);border-radius:0 60px 60px 0}.search-box button:hover{background:#f0f5ff}.category-nav{padding:20px 0;border-bottom:1px solid var(--border-color);overflow-x:auto;-webkit-overflow-scrolling:touch}.category-nav .container{display:flex;gap:10px}.category-pill{appearance:none;-webkit-appearance:none;font-family:inherit;padding:8px 20px;border:1px solid var(--border-color);border-radius:50px;font-size:0.9rem;font-weight:500;color:var(--text-secondary);background:var(--bg-primary);cursor:pointer;white-space:nowrap;transition:all var(--transition);text-decoration:none;display:inline-block;line-height:1.4}.category-pill:hover,.category-pill.active{background:var(--accent);border-color:var(--accent);color:#fff}.category-pill:focus,.category-pill:focus-visible{outline:none;background:var(--bg-primary);border-color:var(--border-color);color:var(--text-secondary)}.category-pill.active:focus,.category-pill.active:focus-visible{background:var(--accent);border-color:var(--accent);color:#fff}.page-header{background:var(--bg-primary);border-bottom:1px solid var(--border-color);padding:40px 0;text-align:center}.page-header h1{font-size:2rem;font-weight:800;margin-bottom:8px}.page-header p{color:var(--text-secondary);font-size:1rem}.main-content{padding:40px 0}.content-grid{display:grid;grid-template-columns:1fr 340px;gap:32px;align-items:start}@media (max-width:968px){.content-grid{grid-template-columns:1fr}}.article-card{background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-lg);overflow:hidden;transition:all var(--transition);margin-bottom:24px}.article-card:hover{box-shadow:0 12px 40px -8px rgba(0,0,0,0.12),0 4px 12px -2px rgba(0,0,0,0.06);transform:translateY(-2px)}.article-card.featured{border-color:var(--accent);border-width:2px}.article-card-body{padding:24px}.article-card .category-tag{display:inline-block;padding:4px 12px;border-radius:50px;font-size:0.78rem;font-weight:600;margin-bottom:12px;background:var(--accent-light);color:var(--accent)}.article-card h2{font-size:1.35rem;font-weight:700;margin-bottom:10px;line-height:1.4}.article-card h2 a{color:var(--text-primary);transition:color var(--transition)}.article-card h2 a:hover{color:var(--accent)}.article-card .excerpt{color:var(--text-secondary);font-size:0.95rem;line-height:1.7;margin-bottom:16px;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}.article-meta{display:flex;align-items:center;gap:16px;font-size:0.85rem;color:var(--text-tertiary)}.article-meta span{display:flex;align-items:center;gap:4px}.article-views{color:var(--text-tertiary);font-size:0.85rem}.article-views::before{content:"👁 "}.featured-banner{background:var(--bg-card);border:2px solid;border-image:linear-gradient(135deg,var(--gradient-start),var(--gradient-end)) 1;border-radius:var(--radius-lg);padding:32px;margin-bottom:32px;position:relative}.featured-badge{position:absolute;top:-1px;right:24px;background:linear-gradient(135deg,var(--gradient-start),var(--gradient-end));color:#fff;padding:6px 16px;border-radius:0 0 8px 8px;font-size:0.8rem;font-weight:600}.featured-banner .category-tag{display:inline-block;padding:4px 12px;border-radius:50px;font-size:0.78rem;font-weight:600;margin-bottom:12px;background:var(--accent-light);color:var(--accent)}.featured-banner h2{font-size:1.6rem;font-weight:700;margin-bottom:10px;line-height:1.35}.featured-banner h2 a{color:var(--text-primary)}.featured-banner .excerpt{color:var(--text-secondary);font-size:1rem;line-height:1.7;margin-bottom:16px}.sidebar{position:sticky;top:84px}.sidebar-widget{background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-lg);padding:24px;margin-bottom:24px}.sidebar-widget h3{font-size:1.05rem;font-weight:700;margin-bottom:16px;padding-bottom:12px;border-bottom:2px solid var(--accent)}.sidebar-list{list-style:none}.sidebar-list li{padding:10px 0;border-bottom:1px solid var(--border-color);font-size:0.9rem}.sidebar-list li:last-child{border-bottom:none}.sidebar-list li a{color:var(--text-secondary);transition:color var(--transition);display:flex;align-items:center;gap:8px}.sidebar-list li a:hover{color:var(--accent)}.ad-placeholder-sidebar{background:var(--bg-tertiary);border:1px dashed var(--border-color);border-radius:var(--radius-md);padding:24px;text-align:center;color:var(--text-tertiary);font-size:0.85rem;min-height:250px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px}.article-detail{max-width:800px;margin:0 auto;padding:40px 20px}.article-header{margin-bottom:32px}.article-header .category-tag{display:inline-block;padding:4px 14px;border-radius:50px;font-size:0.8rem;font-weight:600;background:var(--accent-light);color:var(--accent);margin-bottom:16px}.category-tag.cat-ai-frontier{background:#eff6ff;color:#1d4ed8}.category-tag.cat-tech-news{background:#fff7ed;color:#c2410c}.category-tag.cat-info-gap{background:#fdf2f8;color:#be185d}.category-tag.cat-industry-insight{background:#eef2ff;color:#4338ca}.category-tag.cat-software-tutorial{background:#ecfdf5;color:#047857}[data-theme="dark"] .category-tag.cat-ai-frontier{background:#1e3a5f;color:#93c5fd}[data-theme="dark"] .category-tag.cat-tech-news{background:#3b2f1a;color:#fcd34d}[data-theme="dark"] .category-tag.cat-info-gap{background:#3b1a2e;color:#f9a8d4}[data-theme="dark"] .category-tag.cat-industry-insight{background:#1e2240;color:#a5b4fc}[data-theme="dark"] .category-tag.cat-software-tutorial{background:#064e3b;color:#6ee7b7}.article-header h1{font-size:2.2rem;font-weight:800;line-height:1.3;margin-bottom:16px;letter-spacing:-0.5px}.article-detail .article-meta{margin-bottom:24px;padding-bottom:24px;border-bottom:1px solid var(--border-color)}.article-content{font-size:1.05rem;line-height:1.85;color:var(--text-primary)}.article-content h2{font-size:1.5rem;font-weight:700;margin:32px 0 16px;padding-bottom:8px;border-bottom:2px solid var(--accent)}.article-content h3{font-size:1.2rem;font-weight:700;margin:24px 0 12px}.article-content p{margin-bottom:16px}.article-content ul,.article-content ol{margin:16px 0;padding-left:24px}.article-content li{margin-bottom:8px}.article-content blockquote{border-left:4px solid var(--accent);padding:12px 20px;margin:20px 0;background:var(--accent-light);border-radius:0 var(--radius-sm) var(--radius-sm) 0;color:var(--text-secondary);font-style:italic}.article-content code{background:var(--bg-tertiary);padding:2px 8px;border-radius:4px;font-size:0.9em;font-family:'SF Mono','Fira Code','Cascadia Code',monospace}.article-content pre{background:var(--bg-tertiary);padding:20px;border-radius:var(--radius-md);overflow-x:auto;margin:20px 0}.article-content pre code{background:none;padding:0}.ad-placeholder-inline{background:var(--bg-tertiary);border:1px dashed var(--border-color);border-radius:var(--radius-md);padding:20px;text-align:center;color:var(--text-tertiary);font-size:0.85rem;margin:32px 0;min-height:90px;display:flex;align-items:center;justify-content:center}.share-bar{display:flex;align-items:center;gap:12px;margin-top:32px;padding-top:24px;border-top:1px solid var(--border-color)}.share-bar span{font-weight:600;font-size:0.9rem;color:var(--text-secondary)}.share-btn{padding:8px 16px;border:1px solid var(--border-color);border-radius:var(--radius-sm);background:var(--bg-primary);color:var(--text-secondary);font-size:0.85rem;cursor:pointer;transition:all var(--transition)}.share-btn:hover{border-color:var(--accent);color:var(--accent)}.related-articles{margin-top:48px;padding-top:32px;border-top:1px solid var(--border-color)}.related-articles h3{font-size:1.2rem;font-weight:700;margin-bottom:20px}.related-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:16px}.related-card{background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-md);padding:16px;transition:all var(--transition)}.related-card:hover{box-shadow:var(--shadow-md)}.related-card h4{font-size:0.95rem;font-weight:600;margin-bottom:8px}.related-card h4 a{color:var(--text-primary)}.related-card h4 a:hover{color:var(--accent)}.about-section{max-width:800px;margin:0 auto}.about-section h2{font-size:1.5rem;font-weight:700;margin:32px 0 16px}.about-section p{color:var(--text-secondary);margin-bottom:16px;line-height:1.8}.subscribe-cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:24px;margin:32px 0}.subscribe-card{background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-lg);padding:32px 24px;text-align:center;transition:all var(--transition);position:relative}.subscribe-card:hover{box-shadow:var(--shadow-lg);transform:translateY(-4px)}.subscribe-card.featured-plan{border-color:var(--accent);border-width:2px}.subscribe-card .plan-badge{position:absolute;top:-12px;left:50%;transform:translateX(-50%);background:linear-gradient(135deg,var(--gradient-start),var(--gradient-end));color:#fff;padding:4px 16px;border-radius:50px;font-size:0.8rem;font-weight:600}.subscribe-card .plan-icon{font-size:2.5rem;margin-bottom:16px}.subscribe-card h3{font-size:1.2rem;font-weight:700;margin-bottom:8px}.subscribe-card .price{font-size:2rem;font-weight:800;color:var(--accent);margin-bottom:16px}.subscribe-card .price span{font-size:0.9rem;font-weight:400;color:var(--text-tertiary)}.subscribe-card ul{list-style:none;text-align:left;margin-bottom:24px}.subscribe-card ul li{padding:6px 0;font-size:0.9rem;color:var(--text-secondary)}.subscribe-card ul li::before{content:'✓ ';color:var(--success);font-weight:700}.btn{display:inline-block;padding:12px 28px;border-radius:50px;font-size:0.95rem;font-weight:600;cursor:pointer;border:none;transition:all var(--transition);text-align:center}.btn-primary{background:linear-gradient(135deg,var(--gradient-start),var(--gradient-end));color:#fff}.btn-primary:hover{opacity:0.9;transform:translateY(-1px);box-shadow:var(--shadow-md);color:#fff}.btn-outline{background:transparent;border:2px solid var(--accent);color:var(--accent)}.btn-outline:hover{background:var(--accent);color:#fff}.btn-block{display:block;width:100%}.newsletter-form{display:flex;gap:12px;max-width:480px;margin:24px auto}.newsletter-form input{flex:1;padding:12px 20px;border:2px solid var(--border-color);border-radius:50px;font-size:0.95rem;background:var(--bg-primary);color:var(--text-primary);outline:none;transition:border-color var(--transition)}.newsletter-form input:focus{border-color:var(--accent)}.newsletter-form button{padding:12px 28px;border-radius:50px;border:none;background:linear-gradient(135deg,var(--gradient-start),var(--gradient-end));color:#fff;font-weight:600;cursor:pointer;white-space:nowrap;transition:all var(--transition)}.newsletter-form button:hover{opacity:0.9}.subscribe-cta{background:linear-gradient(135deg,var(--gradient-start),var(--gradient-end));color:#fff;padding:48px 32px;border-radius:var(--radius-lg);text-align:center;margin:40px 0}.subscribe-cta h2{font-size:1.8rem;font-weight:800;margin-bottom:12px}.subscribe-cta p{opacity:0.9;margin-bottom:24px}.footer{background:var(--bg-primary);border-top:1px solid var(--border-color);padding:40px 0 24px;margin-top:60px}.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:40px;margin-bottom:32px}.footer-col h4{font-size:1rem;font-weight:700;margin-bottom:16px}.footer-col p{color:var(--text-secondary);font-size:0.9rem;line-height:1.7}.footer-col ul{list-style:none}.footer-col ul li{margin-bottom:8px}.footer-col ul li a{color:var(--text-secondary);font-size:0.9rem;transition:color var(--transition)}.footer-col ul li a:hover{color:var(--accent)}.footer-bottom{border-top:1px solid var(--border-color);padding-top:20px;display:flex;justify-content:space-between;align-items:center;font-size:0.85rem;color:var(--text-tertiary)}.pagination{display:flex;justify-content:center;gap:8px;margin-top:32px}.pagination button{padding:8px 16px;border:1px solid var(--border-color);border-radius:var(--radius-sm);background:var(--bg-primary);color:var(--text-secondary);cursor:pointer;font-size:0.9rem;transition:all var(--transition)}.pagination button.active,.pagination button:hover{background:var(--accent);border-color:var(--accent);color:#fff}.search-results-header{margin-bottom:24px;padding:20px;background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-md)}.search-results-header h3{font-size:1.1rem;font-weight:600}.search-results-header p{color:var(--text-tertiary);font-size:0.9rem;margin-top:4px}.no-results{text-align:center;padding:60px 20px;color:var(--text-tertiary)}.no-results .icon{font-size:3rem;margin-bottom:16px}.toast{position:fixed;bottom:32px;left:50%;transform:translateX(-50%);background:var(--bg-primary);border:1px solid var(--border-color);border-radius:var(--radius-md);padding:14px 28px;box-shadow:var(--shadow-xl);z-index:2000;font-size:0.9rem;font-weight:500;animation:toastIn 0.3s ease,toastOut 0.3s ease 2.5s forwards}.toast.success{border-color:var(--success);color:var(--success)}.toast.error{border-color:var(--danger);color:var(--danger)}@keyframes toastIn{from{opacity:0;transform:translateX(-50%) translateY(20px)}to{opacity:1;transform:translateX(-50%) translateY(0)}}@keyframes toastOut{from{opacity:1}to{opacity:0}}@media (max-width:768px){.hero h1{font-size:2.2rem}.hero p{font-size:1rem}.nav-links{display:none;position:absolute;top:64px;left:0;right:0;background:var(--bg-primary);border-bottom:1px solid var(--border-color);flex-direction:column;padding:16px;gap:4px}.nav-links.open{display:flex}.mobile-menu-btn{display:block}.content-grid{grid-template-columns:1fr}.article-header h1{font-size:1.6rem}.footer-grid{grid-template-columns:1fr;gap:24px}.footer-bottom{flex-direction:column;gap:8px;text-align:center}.newsletter-form{flex-direction:column;max-width:100%}.newsletter-form button{width:100%}.subscribe-cards{grid-template-columns:1fr}.featured-banner{padding:24px}.featured-banner h2{font-size:1.3rem}.search-box{max-width:100%}.related-grid{grid-template-columns:1fr}}@media (max-width:480px){.hero{padding:50px 0}.hero h1{font-size:1.8rem}.search-box input{padding:12px 16px}.search-box button{padding:12px 18px;font-size:0.85rem}.category-pill{padding:6px 14px;font-size:0.8rem}}@media print{.navbar,.footer,.sidebar,.ad-placeholder-inline,.ad-placeholder-sidebar,.share-bar,.theme-toggle{display:none}body{background:#fff;color:#000}}