:root{--bg-primary:#0a121a;--bg-secondary:#111f2e;--bg-card:rgba(255,255,255,0.04);--bg-card-hover:rgba(255,255,255,0.08);--border-card:rgba(255,255,255,0.06);--text-primary:#e8edf4;--text-secondary:#b0c4d8;--text-muted:#5a7a8a;--accent-1:#4f7cff;--accent-2:#f0b429;--accent-3:#64b5f6;--gradient-main:linear-gradient(135deg,#4f7cff,#64b5f6);--gradient-glow:radial-gradient(ellipse at 30% 20%,rgba(79,124,255,0.08),transparent 60%),radial-gradient(ellipse at 70% 80%,rgba(240,180,41,0.06),transparent 50%);--radius-card:20px;--radius-sm:10px;--shadow-card:0 20px 60px rgba(0,0,0,0.5);--font-sans:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,sans-serif;--font-mono:'JetBrains Mono','Fira Code',monospace;--transition-smooth:cubic-bezier(0.25,0.46,0.45,0.94);--secondary:#4f46e5;--light:#f8fafc;--dark:#0f172a;--gray:#64748b;--success:#10b981;--border:#e2e8f0;--shadow:0 4px 6px rgba(0,0,0,0.1)}.article-container{background:var(--bg-primary);min-height:100vh;padding-top:0}.bg-glow{position:fixed;inset:0;pointer-events:none;z-index:0;background:var(--gradient-glow);animation:glowPulse 14s ease-in-out infinite alternate}@keyframes glowPulse{0%{opacity:.5;transform:scale(1)}100%{opacity:1;transform:scale(1.06)}}.container{position:relative;z-index:1;max-width:1060px;margin:0 auto;padding:0 28px 60px}.top-progress{position:fixed;top:0;left:0;right:0;z-index:1000;background:rgba(10,18,26,0.82);backdrop-filter:blur(18px) saturate(1.4);border-bottom:1px solid rgba(255,255,255,0.04);padding:12px 28px;display:flex;align-items:center;justify-content:space-between;transition:transform .3s var(--transition-smooth)}.top-progress.hidden{transform:translateY(-100%)}.top-progress .label{font-size:13px;font-weight:600;color:var(--text-secondary);letter-spacing:.3px}.top-progress .label span{color:var(--accent-2);font-weight:700}.progress-track{flex:1;margin:0 24px;height:4px;background:rgba(255,255,255,0.08);border-radius:10px;overflow:hidden;max-width:400px}.progress-track .bar{height:100%;width:0;background:var(--gradient-main);border-radius:10px;transition:width .2s ease}.top-progress .chapter-idx{font-size:13px;font-weight:500;color:var(--text-muted);font-variant-numeric:tabular-nums;min-width:80px;text-align:right}.breadcrumb-nav{padding:12px 0 20px;border-bottom:1px solid rgba(255,255,255,0.04);margin-bottom:10px}.breadcrumb-inner{font-size:14px;color:var(--text-muted)}.breadcrumb-link{color:var(--text-secondary);text-decoration:none;transition:color .3s ease}.breadcrumb-link:hover{color:var(--accent-1)}.breadcrumb-separator{margin:0 8px;color:var(--text-muted);opacity:.4}.breadcrumb-current{color:var(--text-primary);font-weight:500}.hero{padding:140px 0 70px;position:relative;text-align:center;border-bottom:1px solid rgba(255,255,255,0.04);margin-bottom:30px}.hero .badge{display:inline-block;background:rgba(79,124,255,0.12);border:1px solid rgba(79,124,255,0.20);color:var(--accent-1);font-size:13px;font-weight:600;letter-spacing:.8px;padding:6px 20px;border-radius:100px;text-transform:uppercase;margin-bottom:20px}.hero h1{font-size:clamp(2.4rem,5.5vw,4rem);font-weight:800;line-height:1.15;letter-spacing:-0.02em;background:linear-gradient(135deg,#fff 40%,#8ab4f0 80%);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;margin-bottom:16px}.hero .sub{font-size:clamp(1.05rem,1.6vw,1.3rem);color:var(--text-secondary);max-width:720px;margin:0 auto 12px;font-weight:400;line-height:1.7}.hero .sub a{text-decoration:none;border-bottom:1px dashed rgba(79,124,255,0.3);transition:border-color .3s ease}.hero .sub a:hover{border-color:var(--accent-1)}.hero .meta{display:flex;justify-content:center;gap:28px;flex-wrap:wrap;margin-top:20px;font-size:14px;color:var(--text-muted)}.hero .meta span{display:flex;align-items:center;gap:8px}.hero .meta .dot{display:inline-block;width:6px;height:6px;border-radius:50%;background:var(--accent-2);animation:dotPulse 2s ease-in-out infinite}@keyframes dotPulse{0%,100%{opacity:.3;transform:scale(0.8)}50%{opacity:1;transform:scale(1.2)}}section{padding:30px 0 10px;opacity:0;transform:translateY(36px);transition:opacity .7s var(--transition-smooth),transform .7s var(--transition-smooth)}section.visible{opacity:1;transform:translateY(0)}.section-number{display:inline-block;font-size:20px;font-weight:700;color:var(--accent-1);letter-spacing:1px;text-transform:uppercase;background:rgba(79,124,255,0.08);padding:4px 16px;border-radius:100px;border:1px solid rgba(79,124,255,0.12);margin-bottom:14px}h2{font-size:clamp(1.8rem,3.2vw,2.6rem);font-weight:700;letter-spacing:-0.01em;line-height:1.25;margin-bottom:14px;background:linear-gradient(135deg,#fff 50%,#8ab4f0);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}h2 .highlight{background:linear-gradient(135deg,var(--accent-2),var(--accent-3));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}h3{font-size:1.2rem;font-weight:600;color:#e0eaf0;margin:28px 0 12px;letter-spacing:-0.01em}p{color:var(--text-secondary);margin-bottom:14px;font-size:1.05rem}p strong{color:#e0eaf0;font-weight:600}p a{color:var(--accent-1);text-decoration:none;border-bottom:1px dashed rgba(79,124,255,0.25);transition:border-color .3s ease}p a:hover{border-color:var(--accent-1)}.card{background:var(--bg-card);backdrop-filter:blur(4px);border:1px solid var(--border-card);border-radius:var(--radius-card);padding:24px 28px;margin:20px 0;box-shadow:var(--shadow-card);transition:background .3s ease,transform .3s ease,box-shadow .3s ease}.card:hover{background:var(--bg-card-hover);transform:translateY(-2px);box-shadow:0 24px 72px rgba(0,0,0,0.6)}.card .label{font-size:15px;font-weight:600;text-transform:uppercase;letter-spacing:.5px;color:var(--accent-2);margin-bottom:8px;display:block}.card .label i{margin-right:8px}.pull-quote{border-left:4px solid var(--accent-2);padding:14px 22px;margin:24px 0;background:rgba(240,180,41,0.05);border-radius:0 var(--radius-sm) var(--radius-sm) 0;font-size:1.05rem;color:#d6dce8;font-weight:500}.pull-quote strong{color:#fff}.pull-quote a{color:var(--accent-1);text-decoration:none;border-bottom:1px dashed rgba(79,124,255,0.3)}.pull-quote a:hover{border-color:var(--accent-1)}.media-placeholder{background:rgba(255,255,255,0.02);border:2px dashed rgba(255,255,255,0.08);border-radius:var(--radius-sm);margin:18px 0 10px;padding:20px;text-align:center;color:var(--text-muted);font-size:.95rem;transition:background .2s;min-height:80px;display:flex;flex-direction:column;align-items:center;justify-content:center}.media-placeholder:hover{background:rgba(255,255,255,0.04);border-color:rgba(255,255,255,0.15)}.media-placeholder img{width:100%;border-radius:var(--radius-sm)}.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin:12px 0 8px}@media(max-width:640px){.grid-2{grid-template-columns:1fr}}.prep-item{background:rgba(255,255,255,0.02);border:1px solid rgba(255,255,255,0.04);border-radius:var(--radius-sm);padding:14px 18px;display:flex;align-items:flex-start;gap:12px;transition:background .3s ease,transform .3s ease}.prep-item:hover{background:rgba(79,124,255,0.05);transform:translateY(-2px)}.prep-item .icon{font-size:18px;flex-shrink:0;margin-top:2px;color:var(--accent-1);width:24px;text-align:center}.prep-item .text{font-size:.95rem;color:var(--text-secondary)}.prep-item .text strong{color:#e0eaf0}.prep-item .text a{color:var(--accent-1);text-decoration:none;border-bottom:1px dashed rgba(79,124,255,0.2)}.prep-item .text a:hover{border-color:var(--accent-1)}.pitfall-item{background:rgba(255,255,255,0.02);border-radius:var(--radius-sm);padding:16px 20px;margin-bottom:14px;border-left:3px solid rgba(240,180,41,0.3);transition:background .3s ease}.pitfall-item:hover{background:rgba(255,255,255,0.04)}.pitfall-item .pitfall-title{font-weight:600;color:var(--accent-2);font-size:1rem}.pitfall-item .pitfall-desc{font-size:.95rem;color:var(--text-secondary);margin:4px 0 6px}.pitfall-item .pitfall-solution{font-size:.92rem;color:var(--accent-1)}.pitfall-item .pitfall-solution i{margin-right:6px}.related-reading{margin:40px 0 30px;padding:24px 28px;background:rgba(255,255,255,0.02);border:1px solid rgba(255,255,255,0.06);border-radius:var(--radius-card)}.related-reading h3{margin-top:0;margin-bottom:14px;font-size:1.1rem;color:var(--text-primary)}.related-reading h3 i{color:var(--accent-1);margin-right:10px}.related-reading ul{list-style:none;padding:0;margin:0;display:flex;flex-wrap:wrap;gap:8px 20px}.related-reading ul li{position:relative;padding-left:16px;font-size:.95rem}.related-reading ul li::before{content:"›";position:absolute;left:0;color:var(--accent-1);font-weight:700}.related-reading ul li a{color:var(--text-secondary);text-decoration:none;transition:color .3s ease;border-bottom:1px dashed transparent}.related-reading ul li a:hover{color:var(--accent-1);border-bottom-color:rgba(79,124,255,0.3)}.next-ep{margin:40px 0 30px;padding:28px 32px;background:linear-gradient(135deg,rgba(79,124,255,0.06),rgba(100,181,246,0.06));border:1px solid rgba(79,124,255,0.12);border-radius:var(--radius-card);text-align:center}.next-ep h3{margin-top:0;font-size:1.2rem}.next-ep p{max-width:600px;margin:6px auto 0;color:var(--text-muted)}.next-ep p a{color:var(--accent-1);text-decoration:none;font-weight:500;transition:color .3s ease}.next-ep p a:hover{color:var(--accent-2)}.footer{text-align:center;padding:32px 0 16px;border-top:1px solid rgba(255,255,255,0.03);margin-top:30px;color:var(--text-muted);font-size:14px}.footer p{max-width:100%;font-size:.9rem;margin-bottom:0;color:var(--text-muted)}.footer-note{margin-top:30px;padding-top:20px;border-top:1px solid rgba(255,255,255,0.04);text-align:center;font-size:.9rem;color:var(--text-muted);font-family:var(--font-sans)}.back-link{display:inline-block;margin-top:16px;color:var(--accent-1);text-decoration:none;font-weight:500;transition:color .3s ease}.back-link:hover{color:var(--accent-2)}.back-link i{margin-right:8px}@media(max-width:768px){.container{padding:0 16px 40px}.top-progress{padding:10px 16px;flex-wrap:wrap;gap:6px}.top-progress .label{font-size:12px}.progress-track{order:3;flex:1 1 100%;margin:4px 0 0;max-width:none}.top-progress .chapter-idx{font-size:12px;min-width:60px}.hero{padding:20px 0 20px}.card{padding:18px 16px}.pull-quote{padding:12px 16px;font-size:.98rem}.media-placeholder{padding:14px;min-height:60px}section{padding:20px 0 6px}.related-reading{padding:18px 16px}.related-reading ul{flex-direction:column;gap:6px}.breadcrumb-nav{padding:10px 0 14px}.breadcrumb-inner{font-size:13px}.grid-2{grid-template-columns:1fr}}@media(max-width:480px){.hero h1{font-size:1.9rem}.hero .meta{flex-direction:column;align-items:center;gap:4px}.next-ep{padding:20px 16px}.media-placeholder{min-height:50px;padding:12px}.pitfall-item{padding:12px 14px}}