@import "https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&display=swap";
:root{--bg:#fff;--text-primary:#1a1a1a;--text-secondary:#555;--text-muted:#888;--accent:#4f46e5;--accent-hover:#4338ca;--accent-light:#eef2ff;--border:#e0e0e0;--border-hover:silver;--card-bg:#f9f9f9;--dark-card:#1e1e2e;--dark-card-text:#e2e2ff;--shadow-sm:0 1px 4px #0000000f;--shadow-md:0 4px 16px #00000014;--shadow-lg:0 8px 32px #0000001f;--radius-sm:6px;--radius-md:10px;--radius-lg:16px;--font:"Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;--max-w:940px;--transition:.18s ease}*,:before,:after{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth}body{font-family:var(--font);background:var(--bg);color:var(--text-primary);-webkit-font-smoothing:antialiased;line-height:1.6}a{color:inherit;text-decoration:none}button{font-family:var(--font);cursor:pointer;background:0 0;border:none}img{max-width:100%;display:block}.container{max-width:var(--max-w);margin:0 auto;padding:0 24px}.header{border-bottom:1px solid var(--border);background:var(--bg);z-index:100;position:sticky;top:0}.header-inner{max-width:var(--max-w);justify-content:space-between;align-items:center;height:68px;margin:0 auto;padding:0 24px;display:flex}.logo{align-items:center;gap:12px;display:flex}.logo-icon-img{width:auto;height:32px;display:block}.logo-text-img{width:auto;height:52px;display:block}.nav{align-items:center;gap:24px;display:flex}.nav-link{color:var(--text-secondary);transition:color var(--transition);font-size:.9375rem;font-weight:500;position:relative}.nav-link:hover{color:var(--text-primary)}.nav-link.active{color:var(--accent);font-weight:700}.mobile-menu-btn{display:none}.hero{text-align:center;padding:48px 0 32px}.hero h1{color:var(--text-primary);margin-bottom:16px;font-size:clamp(1.75rem,4vw,2.5rem);font-weight:800;line-height:1.2}.hero-subtitle{color:var(--text-secondary);max-width:580px;margin:0 auto 20px;font-size:1rem}.hero-bullets{flex-direction:column;align-items:flex-start;gap:8px;max-width:440px;margin:0 auto 32px;display:flex}.hero-bullet{color:var(--text-secondary);align-items:center;gap:10px;font-size:.9rem;font-weight:500;display:flex}.ad-banner{border:1px dashed var(--border);border-radius:var(--radius-sm);width:100%;max-width:728px;height:90px;color:var(--text-muted);letter-spacing:.08em;text-transform:uppercase;background:#f3f4f6;justify-content:center;align-items:center;margin:0 auto 24px;font-size:.75rem;display:flex}.tool-box{border:1px solid var(--border);border-radius:var(--radius-lg);background:var(--bg);box-shadow:var(--shadow-sm);margin-bottom:48px;padding:28px}.tool-box-header{gap:12px;margin-bottom:20px;display:flex}.btn-select{color:var(--accent);border:1.5px solid var(--accent);border-radius:var(--radius-sm);transition:all var(--transition);background:0 0;padding:8px 18px;font-size:.875rem;font-weight:600}.btn-select:hover:not(:disabled){background:var(--accent-light)}.btn-select:disabled,.btn-select.disabled{opacity:.55;cursor:not-allowed;color:#9ca3af;background:#f3f4f6;border-color:#d1d5db}.btn-clear{color:#dc2626;border-radius:var(--radius-sm);transition:all var(--transition);background:#fef2f2;border:1.5px solid #fca5a5;padding:8px 18px;font-size:.875rem;font-weight:600}.btn-clear:hover{color:#b91c1c;background:#fee2e2;border-color:#ef4444}.drop-zone{border:2px dashed var(--border);border-radius:var(--radius-md);text-align:center;cursor:pointer;transition:border-color var(--transition), background var(--transition);margin-bottom:24px;padding:48px 24px;position:relative}.drop-zone:hover,.drop-zone.drag-over{border-color:var(--accent);background:var(--accent-light)}.drop-zone.has-file{border-style:solid;border-color:var(--accent);background:#fdfdfd;padding:24px 16px}.drop-zone-icon{margin-bottom:12px;font-size:3rem}.drop-zone-text{color:var(--text-primary);margin-bottom:4px;font-size:1rem;font-weight:600}.drop-zone-sub{color:var(--text-muted);font-size:.813rem}.drop-zone-filename{color:var(--accent);margin-top:8px;font-size:.875rem;font-weight:600}.drop-zone input[type=file]{opacity:0;cursor:pointer;position:absolute;inset:0}.preview-card-container{flex-direction:column;justify-content:center;align-items:center;width:100%;display:flex}.preview-card{width:220px;height:270px;transition:transform var(--transition), box-shadow var(--transition);background:repeating-conic-gradient(#ccc 0% 25%,#e4e4e4 0% 50%) 50%/18px 18px;border:1px solid #0000001f;border-radius:16px;justify-content:center;align-items:center;display:flex;position:relative;overflow:hidden;box-shadow:0 12px 32px #00000040}.preview-card:hover{transform:translateY(-2px);box-shadow:0 16px 40px #0000004d}.preview-card-img{object-fit:cover;opacity:.85;filter:brightness(.95);width:100%;height:100%}.preview-card-placeholder{color:#777;font-size:1.5rem;font-weight:800}.preview-card-filename{color:#fff;text-shadow:0 1px 4px #000c,0 2px 8px #0009;white-space:nowrap;text-overflow:ellipsis;pointer-events:none;z-index:2;max-width:130px;font-size:.85rem;font-weight:700;position:absolute;top:12px;left:12px;overflow:hidden}.preview-card-close-btn{color:#444;cursor:pointer;width:28px;height:28px;transition:all var(--transition);z-index:3;background:#fff;border:1px solid #00000026;border-radius:8px;justify-content:center;align-items:center;display:flex;position:absolute;top:10px;right:10px;box-shadow:0 2px 8px #0003}.preview-card-close-btn:hover{color:#fff;background:#ff4d4f;border-color:#ff4d4f;transform:scale(1.08)}.preview-card-badge{color:#fff;letter-spacing:.04em;text-shadow:0 4px 16px #000000b3,0 2px 6px #00000080;pointer-events:none;z-index:2;-webkit-user-select:none;user-select:none;font-size:2.2rem;font-weight:900;position:absolute}.preview-card-caption{color:var(--accent);margin-top:12px;font-size:.813rem;font-weight:600}.options-grid{flex-direction:column;gap:12px;margin-bottom:24px;display:flex}.option-row{align-items:center;gap:12px;display:flex}.option-label{color:var(--text-secondary);flex-shrink:0;width:60px;font-size:.813rem;font-weight:600}.pills{gap:8px;display:flex}.pill{border:1.5px solid var(--border);color:var(--text-secondary);background:var(--bg);cursor:pointer;transition:all var(--transition);letter-spacing:.02em;border-radius:99px;padding:6px 16px;font-size:.813rem;font-weight:600}.pill:hover{border-color:var(--accent);color:var(--accent)}.pill.active{background:var(--accent);border-color:var(--accent);color:#fff}.btn-cta{color:#fff;background:var(--accent);border-radius:var(--radius-sm);cursor:pointer;width:100%;transition:background var(--transition), transform var(--transition), box-shadow var(--transition);letter-spacing:.02em;border:none;justify-content:center;align-items:center;gap:10px;padding:14px;font-size:1rem;font-weight:700;display:flex}.btn-cta:hover:not(:disabled){background:var(--accent-hover);transform:translateY(-1px);box-shadow:0 4px 16px #4f46e54d}.btn-cta:disabled{opacity:.5;cursor:not-allowed;transform:none}.progress-wrap{margin-top:16px}.progress-label{color:var(--text-secondary);text-align:center;margin-bottom:6px;font-size:.813rem}.progress-bar{background:var(--border);border-radius:99px;width:100%;height:6px;overflow:hidden}.progress-fill{background:var(--accent);border-radius:99px;height:100%;transition:width .2s linear}.sections{padding-bottom:64px}.section{margin-bottom:48px}.section h2{color:var(--text-primary);margin-bottom:14px;font-size:1.375rem;font-weight:700}.section p{color:var(--text-secondary);margin-bottom:12px;font-size:.9375rem;line-height:1.75}.use-case-list{flex-direction:column;gap:10px;list-style:none;display:flex}.use-case-list li{color:var(--text-secondary);align-items:flex-start;gap:10px;font-size:.9375rem;display:flex}.use-case-list li:before{content:"";background:var(--accent);border-radius:50%;flex-shrink:0;width:6px;height:6px;margin-top:9px;display:inline-block}.features-grid{grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:16px;display:grid}.feature-card{background:var(--card-bg);border:1px solid var(--border);border-radius:var(--radius-md);transition:box-shadow var(--transition), border-color var(--transition);padding:18px}.feature-card:hover{box-shadow:var(--shadow-md);border-color:var(--accent)}.feature-card-icon{margin-bottom:8px;font-size:1.5rem}.feature-card-title{color:var(--text-primary);margin-bottom:4px;font-size:.9rem;font-weight:700}.feature-card-desc{color:var(--text-secondary);font-size:.813rem}.guide-card{background:var(--dark-card);border-radius:var(--radius-md);align-items:flex-start;gap:20px;padding:28px;display:flex}.guide-card-icon{flex-shrink:0;font-size:1.75rem}.guide-card-body h3{color:#fff;margin-bottom:6px;font-size:1.05rem;font-weight:700}.guide-card-body p{color:var(--dark-card-text);margin-bottom:14px;font-size:.875rem;line-height:1.65}.guide-card-link{color:var(--accent);transition:gap var(--transition);align-items:center;gap:6px;font-size:.875rem;font-weight:600;display:inline-flex}.guide-card-link:hover{gap:10px}.geo-answer-box{border:1px solid #c7d2fe;border-left:4px solid var(--accent);border-radius:var(--radius-md);background:linear-gradient(135deg,#f5f3ff 0%,#eef2ff 100%);margin-bottom:32px;padding:24px}.geo-answer-badge{text-transform:uppercase;letter-spacing:.08em;color:var(--accent);background:#fff;border:1px solid #c7d2fe;border-radius:99px;align-items:center;gap:6px;margin-bottom:12px;padding:3px 10px;font-size:.72rem;font-weight:700;display:inline-flex}.geo-answer-title{color:var(--text-primary);margin-bottom:8px;font-size:1.1rem;font-weight:800}.geo-answer-text{color:var(--text-secondary);font-size:.92rem;line-height:1.7}.comparison-table-wrap{border:1px solid var(--border);border-radius:var(--radius-md);width:100%;margin-top:16px;overflow-x:auto}.comparison-table{border-collapse:collapse;text-align:left;width:100%;min-width:640px;font-size:.85rem}.comparison-table th,.comparison-table td{border-bottom:1px solid var(--border);padding:12px 14px}.comparison-table th{color:var(--text-primary);background:#f8fafc;font-weight:700}.comparison-table tr:last-child td{border-bottom:none}.comparison-table td.highlight-col,.comparison-table th.highlight-col{color:var(--accent);background:#eef2ff;font-weight:700}.badge-yes{color:#15803d;align-items:center;gap:4px;font-weight:700;display:inline-flex}.badge-no{color:#dc2626;align-items:center;gap:4px;font-weight:600;display:inline-flex}.blog-grid{grid-template-columns:repeat(3,1fr);gap:16px;display:grid}@media (max-width:640px){.blog-grid{grid-template-columns:1fr}}.blog-card{border:1px solid var(--border);border-radius:var(--radius-md);background:var(--bg);cursor:pointer;transition:box-shadow var(--transition), border-color var(--transition), transform var(--transition);padding:20px}.blog-card:hover{box-shadow:var(--shadow-md);border-color:var(--border-hover);transform:translateY(-2px)}.blog-card-tag{text-transform:uppercase;letter-spacing:.08em;color:var(--accent);margin-bottom:8px;font-size:.7rem;font-weight:700}.blog-card-title{color:var(--text-primary);margin-bottom:10px;font-size:.9rem;font-weight:600;line-height:1.4}.blog-card-meta{color:var(--text-muted);font-size:.75rem}.blog-card-arrow{color:var(--accent);transition:transform var(--transition);margin-top:10px;font-size:.8rem;font-weight:600;display:block}.blog-card:hover .blog-card-arrow{transform:translate(4px)}.footer{border-top:1px solid var(--border);padding:24px 0}.footer-inner{max-width:var(--max-w);flex-wrap:wrap;justify-content:space-between;align-items:center;gap:12px;margin:0 auto;padding:0 24px;display:flex}.footer-copy{color:var(--text-muted);font-size:.813rem}.footer-links{gap:20px;display:flex}.footer-link{color:var(--text-muted);transition:color var(--transition);font-size:.813rem}.footer-link:hover{color:var(--text-primary)}.viewer-page{color:#fff;background:#0f0f1a;min-height:100vh}.viewer-container{flex-direction:column;align-items:center;padding:24px;display:flex}.viewer-header{justify-content:space-between;align-items:center;width:100%;max-width:1000px;margin-bottom:24px;display:flex}.viewer-back-btn{color:#a0a0c0;border-radius:var(--radius-sm);cursor:pointer;transition:all var(--transition);background:#ffffff12;border:1px solid #ffffff1f;align-items:center;gap:6px;padding:8px 14px;font-size:.875rem;font-weight:600;display:flex}.viewer-back-btn:hover{color:#fff;background:#ffffff1f}.flipbook-wrap{border-radius:var(--radius-lg);background:#1a1a2e;justify-content:center;width:100%;max-width:1100px;height:fit-content;margin-bottom:20px;padding:20px;display:flex;box-shadow:0 16px 64px #0009}.controls-bar{border-radius:var(--radius-md);z-index:10;background:#1a1a2e;border:1px solid #ffffff26;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:12px;width:100%;max-width:1100px;margin-bottom:20px;padding:12px 20px;display:flex}.ctrl-group{align-items:center;gap:10px;display:flex}.ctrl-btn{border-radius:var(--radius-sm);color:#d0d0f0;cursor:pointer;width:40px;height:40px;transition:all var(--transition);background:#ffffff12;border:1px solid #ffffff2e;justify-content:center;align-items:center;font-size:1rem;display:flex}.ctrl-btn:hover:not(:disabled){color:#fff;background:#ffffff29;border-color:#ffffff59;transform:translateY(-1px)}.ctrl-btn:disabled{opacity:.3;cursor:not-allowed;border-color:#ffffff14}.ctrl-btn.active{background:var(--accent);border-color:var(--accent);color:#fff;box-shadow:0 2px 10px #4f46e566}.ctrl-flip-btn{color:#fff;background:#4f46e533;border:1px solid #4f46e573}.ctrl-flip-btn:hover:not(:disabled){background:var(--accent);border-color:var(--accent);color:#fff;box-shadow:0 4px 14px #4f46e573}.page-indicator{color:#e0e0fc;white-space:nowrap;border-radius:var(--radius-sm);background:#ffffff0d;border:1px solid #ffffff2e;align-items:center;height:40px;padding:0 12px;font-size:.85rem;font-weight:600;display:flex}:fullscreen .viewer-header,:fullscreen .viewer-actions,:fullscreen .ad-banner-dark,:fullscreen .embed-box,.is-fullscreen .viewer-header,.is-fullscreen .viewer-actions,.is-fullscreen .ad-banner-dark,.is-fullscreen .embed-box{display:none!important}:fullscreen .viewer-page,.is-fullscreen.viewer-page{background:#09090e;flex-direction:column;justify-content:space-between;align-items:center;width:100vw;height:100vh;padding:0;display:flex;overflow:hidden}:fullscreen .viewer-container,.is-fullscreen .viewer-container{justify-content:space-between;width:100vw;max-width:100vw;height:100vh;margin:0;padding:16px}:fullscreen .flipbook-wrap,.is-fullscreen .flipbook-wrap{width:100%;max-width:100vw;box-shadow:none;background:0 0;border-radius:0;flex:1;align-items:center;margin-bottom:8px;padding:0}:fullscreen .controls-bar,.is-fullscreen .controls-bar{-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);background:#141423d9;border:1px solid #ffffff26;max-width:850px;margin-bottom:4px;box-shadow:0 8px 32px #0009}.embed-box{border-radius:var(--radius-md);background:#1a1a2e;border:1px solid #ffffff1a;width:100%;max-width:1100px;margin-bottom:20px;padding:20px}.embed-box h3{color:#c0c0e0;align-items:center;gap:6px;margin-bottom:10px;font-size:.875rem;font-weight:700;display:flex}.embed-code-wrap{position:relative}.embed-code{border-radius:var(--radius-sm);color:#a0e0a0;resize:none;background:#0000004d;border:1px solid #ffffff14;outline:none;width:100%;min-height:72px;padding:12px;font-family:Courier New,monospace;font-size:.8rem}.btn-copy{color:#fff;background:var(--accent);border-radius:var(--radius-sm);cursor:pointer;transition:background var(--transition);padding:4px 12px;font-size:.75rem;font-weight:600;position:absolute;top:8px;right:8px}.btn-copy:hover{background:var(--accent-hover)}.btn-copy.copied{background:#16a34a}.viewer-actions{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:12px;width:100%;max-width:1100px;margin-bottom:24px;display:flex}.btn-secondary{color:var(--accent);border:1.5px solid var(--accent);border-radius:var(--radius-sm);cursor:pointer;transition:all var(--transition);background:0 0;align-items:center;gap:6px;padding:10px 18px;font-size:.875rem;font-weight:600;display:flex}.btn-secondary:hover{background:#4f46e526}.btn-ghost{color:#a0a0c0;border-radius:var(--radius-sm);cursor:pointer;transition:all var(--transition);background:#ffffff0d;border:1px solid #ffffff26;align-items:center;gap:6px;padding:10px 18px;font-size:.875rem;font-weight:600;display:flex}.btn-ghost:hover{color:#fff;background:#ffffff1a}.ad-banner-dark{border-radius:var(--radius-sm);color:#fff3;letter-spacing:.08em;text-transform:uppercase;background:#ffffff08;border:1px dashed #ffffff1a;justify-content:center;align-items:center;width:100%;max-width:1100px;height:90px;margin-bottom:24px;font-size:.75rem;display:flex}.how-to-page{max-width:var(--max-w);margin:0 auto;padding:48px 24px}.how-to-page h1{margin-bottom:8px;font-size:2rem;font-weight:800}.how-to-page .subtitle{color:var(--text-secondary);margin-bottom:40px;font-size:1rem}.step-list{flex-direction:column;gap:32px;display:flex}.step-item{align-items:flex-start;gap:20px;display:flex}.step-number{background:var(--accent);color:#fff;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;width:40px;height:40px;font-size:1rem;font-weight:700;display:flex}.step-body h3{margin-bottom:6px;font-size:1.05rem;font-weight:700}.step-body p{color:var(--text-secondary);font-size:.9375rem;line-height:1.7}.how-to-meta-bar{color:var(--text-muted);flex-wrap:wrap;align-items:center;gap:18px;margin-bottom:24px;font-size:.875rem;display:flex}.blog-figure{border:1px solid var(--border);border-radius:var(--radius-md);box-shadow:var(--shadow-sm);transition:border-color var(--transition), box-shadow var(--transition);background:#0f172a;margin:32px 0 28px;overflow:hidden}.blog-figure:hover{border-color:var(--border-hover);box-shadow:var(--shadow-md)}.blog-figure-image{width:100%;height:auto;display:block}.blog-figure-caption{border-top:1px solid var(--border);color:var(--text-secondary);text-align:center;background:#f8fafc;padding:12px 20px;font-size:.875rem;line-height:1.55}.blog-figure-caption strong{color:var(--text-primary)}.blog-callout{border-left:3px solid var(--accent);border-radius:0 var(--radius-sm) var(--radius-sm) 0;color:var(--text-secondary);background:#f8fafc;margin:24px 0;padding:16px 20px;font-size:.95rem;line-height:1.7}.blog-callout strong{color:var(--text-primary)}.blog-tip-card{border-radius:var(--radius-sm);color:#1e40af;background:#eff6ff;border:1px solid #bfdbfe;align-items:flex-start;gap:12px;margin:20px 0 24px;padding:14px 20px;font-size:.92rem;line-height:1.65;display:flex}.blog-tip-card strong{color:#1e3a8a}.blog-page{max-width:var(--max-w);margin:0 auto;padding:48px 24px}.blog-page h1{margin-bottom:8px;font-size:2rem;font-weight:800}.blog-page .subtitle{color:var(--text-secondary);margin-bottom:40px;font-size:1rem}.blog-list{flex-direction:column;gap:24px;display:flex}.blog-list-card{border:1px solid var(--border);border-radius:var(--radius-md);cursor:pointer;transition:box-shadow var(--transition), border-color var(--transition);padding:24px}.blog-list-card:hover{box-shadow:var(--shadow-md);border-color:var(--border-hover)}.blog-list-card h2{margin-bottom:8px;font-size:1.1rem;font-weight:700}.blog-list-card p{color:var(--text-secondary);font-size:.9rem;line-height:1.65}.blog-list-card-meta{color:var(--text-muted);align-items:center;gap:12px;margin-top:12px;font-size:.8rem;display:flex}.blog-list-tag{text-transform:uppercase;letter-spacing:.08em;color:var(--accent);background:var(--accent-light);border-radius:99px;padding:2px 8px;font-size:.7rem;font-weight:700}.spinner{border:3px solid #4f46e533;border-top-color:var(--accent);border-radius:50%;width:40px;height:40px;margin:0 auto;animation:.8s linear infinite spin}@keyframes spin{to{transform:rotate(360deg)}}.modal-backdrop{-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);z-index:1000;background:#000000a6;justify-content:center;align-items:center;padding:16px;display:flex;position:fixed;inset:0}.modal-content{border-radius:var(--radius-lg);border:1px solid var(--border);background:#fff;width:100%;max-width:440px;padding:28px;animation:.2s ease-out modalFadeIn;box-shadow:0 20px 60px #00000059}@keyframes 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16px}.option-row{flex-direction:column;align-items:flex-start}.option-label{width:auto}.controls-bar{justify-content:center}.viewer-actions{flex-direction:column}.blog-grid{grid-template-columns:1fr}.header-inner{padding:0 16px}.viewer-header{flex-direction:column;gap:12px}.logo-icon-img{height:40px}.logo-text-img{height:60px}.mobile-menu-btn{color:var(--text-primary);z-index:102;justify-content:center;align-items:center;display:flex}.nav{background:var(--bg);border-bottom:1px solid var(--border);box-shadow:var(--shadow-md);z-index:101;flex-direction:column;padding:20px;display:none;position:absolute;top:68px;left:0;right:0}.nav.open{display:flex}}.error-page-container{background:var(--bg);justify-content:center;align-items:center;min-height:calc(100vh - 120px);padding:48px 24px;display:flex}.error-content{text-align:center;width:100%;max-width:580px;animation:.4s ease-out fadeIn}@keyframes 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h2{color:var(--text-primary);letter-spacing:-.01em;margin:40px 0 16px;font-size:1.45rem;font-weight:800;line-height:1.35}.blog-article-body h3{color:var(--text-primary);margin:32px 0 12px;font-size:1.2rem;font-weight:750;line-height:1.4}.blog-article-body p{color:var(--text-secondary);margin-bottom:16px;font-size:1.02rem;line-height:1.8}.blog-article-body strong,.blog-takeaway-box strong,.blog-list-items strong,.blog-table strong,.blog-faq-item strong{color:var(--text-primary);font-weight:700}.blog-inline-link{color:var(--accent);text-underline-offset:3px;font-weight:500;text-decoration:underline;text-decoration-thickness:1.5px;transition:color .15s,text-decoration-color .15s}.blog-inline-link:hover{color:var(--accent-hover);text-decoration-color:currentColor}.blog-article-body code,.blog-takeaway-box code,.blog-list-items code,.blog-table code,.blog-faq-item code{color:#0f172a;word-break:break-word;background:#f1f5f9;border:1px solid #e2e8f0;border-radius:4px;padding:.18em 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