:root{--purple-primary: #7928CA;--purple-hover: #6620B0;--purple-light: #F3E8FF;--purple-dark: #5B1F9E;--cyan-accent: #00D4FF;--cyan-hover: #00B8E0;--white: #FFFFFF;--black: #000000;--gray-50: #FAFAFA;--gray-100: #F5F5F5;--gray-200: #E5E5E5;--gray-300: #D4D4D4;--gray-400: #A3A3A3;--gray-500: #737373;--gray-600: #525252;--gray-700: #404040;--gray-800: #262626;--gray-900: #171717;--success: #10B981;--success-light: #D1FAE5;--warning: #F59E0B;--error: #EF4444;--gradient-primary: linear-gradient(135deg, #7928CA 0%, #00D4FF 100%);--gradient-hero: linear-gradient(180deg, #FFFFFF 0%, #F8F6FF 100%);--gradient-card: linear-gradient(180deg, #FFFFFF 0%, #FAFAFA 100%);--font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;--text-xs: .75rem;--text-sm: .875rem;--text-base: 1rem;--text-lg: 1.125rem;--text-xl: 1.25rem;--text-2xl: 1.5rem;--text-3xl: 1.875rem;--text-4xl: 2.25rem;--text-5xl: 3rem;--text-6xl: 3.75rem;--font-light: 300;--font-normal: 400;--font-medium: 500;--font-semibold: 600;--font-bold: 700;--font-extrabold: 800;--leading-tight: 1.25;--leading-normal: 1.5;--leading-relaxed: 1.625;--tracking-tight: -.025em;--tracking-normal: 0;--tracking-wide: .025em;--space-1: .25rem;--space-2: .5rem;--space-3: .75rem;--space-4: 1rem;--space-5: 1.25rem;--space-6: 1.5rem;--space-8: 2rem;--space-10: 2.5rem;--space-12: 3rem;--space-16: 4rem;--space-20: 5rem;--space-24: 6rem;--space-32: 8rem;--radius-sm: .375rem;--radius-md: .5rem;--radius-lg: .75rem;--radius-xl: 1rem;--radius-2xl: 1.5rem;--radius-full: 9999px;--shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, .05);--shadow-md: 0 4px 6px -1px rgba(0, 0, 0, .1), 0 2px 4px -2px rgba(0, 0, 0, .1);--shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, .1), 0 4px 6px -4px rgba(0, 0, 0, .1);--shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, .1), 0 8px 10px -6px rgba(0, 0, 0, .1);--shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, .25);--shadow-purple: 0 10px 40px -10px rgba(121, 40, 202, .3);--shadow-card: 0 1px 3px rgba(0, 0, 0, .08), 0 8px 24px rgba(0, 0, 0, .04);--transition-fast: .15s ease;--transition-base: .2s ease;--transition-slow: .3s ease;--transition-bounce: .3s cubic-bezier(.34, 1.56, .64, 1);--container-max: 1200px;--container-padding: 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var(--space-10);font-size:var(--text-xl);border-radius:var(--radius-xl)}.card{background:var(--white);border-radius:var(--radius-xl);border:1px solid var(--gray-100);box-shadow:var(--shadow-card);transition:all var(--transition-base)}.card:hover{box-shadow:var(--shadow-lg);transform:translateY(-4px)}.section{padding:var(--space-24) 0}.section-header{text-align:center;margin-bottom:var(--space-16)}.section-title{font-size:var(--text-4xl);font-weight:var(--font-bold);color:var(--gray-900);margin-bottom:var(--space-4)}.section-subtitle{font-size:var(--text-lg);color:var(--gray-500);max-width:600px;margin:0 auto}.badge{display:inline-flex;align-items:center;gap:var(--space-2);padding:var(--space-1) 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#0000000d}.error-problem,.error-solution{display:flex;align-items:center;gap:.75rem;font-size:.875rem}.error-problem{color:var(--epubxt-text-muted)}.error-solution{color:#059669;font-weight:600}.error-icon-x,.error-icon-check{width:20px;height:20px;flex-shrink:0}.error-icon-x{stroke:#dc2626}.error-icon-check{stroke:#059669}.arrow-icon{width:20px;height:20px;stroke:var(--epubxt-border-dark);flex-shrink:0}.errors-cta{text-align:center;margin-top:3rem;padding:2rem;background:var(--epubxt-bg-white);border-radius:var(--radius-xl);border:1px dashed var(--epubxt-border-dark)}.errors-cta p{font-size:1.125rem;color:var(--epubxt-text-muted);font-weight:600;margin:0}.epubxt-standards{background:var(--epubxt-bg-white)}.standards-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:2rem;margin-top:4rem}.standard-card{text-align:center;padding:3rem 2rem;background:var(--epubxt-bg-offwhite);border-radius:var(--radius-xl);border:1px solid var(--epubxt-border);transition:all .4s 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#00000005}.feature-category:hover{border-color:var(--epubxt-border-dark);box-shadow:0 10px 30px -10px #00000014;transform:translateY(-4px)}.category-name{font-size:1.125rem;font-weight:700;color:var(--epubxt-text-main);margin-bottom:1.5rem;padding-bottom:1rem;border-bottom:2px solid var(--epubxt-bg-offwhite)}.category-items{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:1rem}.category-items li{display:flex;align-items:flex-start;gap:.75rem;font-size:.9375rem;color:var(--epubxt-text-muted);line-height:1.5}.category-items svg{width:20px;height:20px;stroke:var(--epubxt-primary);flex-shrink:0;margin-top:2px}.epubxt-qc{background:var(--epubxt-bg-offwhite);border-top:1px solid var(--epubxt-border)}.qc-steps{display:grid;grid-template-columns:repeat(3,1fr);gap:2rem;margin-top:4rem}.qc-step-card{position:relative;background:var(--epubxt-bg-white);border:1px solid var(--epubxt-border);border-radius:var(--radius-xl);padding:2.5rem 2rem;transition:all .3s 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.price{font-size:3.5rem;font-weight:800;line-height:1;color:#fff;letter-spacing:-.05em}.pricing-amount .per{font-size:1.25rem;opacity:.8}.pricing-note{font-size:.875rem;opacity:.9;font-weight:500;margin-bottom:1.75rem;max-width:240px}.pricing-includes{list-style:none;padding:0;margin:0;text-align:left;display:grid;grid-template-columns:1fr 1fr;column-gap:2.5rem;row-gap:.875rem;flex:1;position:relative;z-index:1}.pricing-includes li{display:flex;align-items:flex-start;gap:.75rem;font-size:.9375rem;font-weight:500;opacity:1;transform:none;visibility:visible}.pricing-includes li.animate-on-scroll{opacity:0;transform:translateY(10px)}.pricing-includes li.animate-on-scroll.visible,.pricing-card-wrapper.visible .pricing-includes li.animate-on-scroll{opacity:1;transform:translateY(0)}.pricing-includes svg{width:18px;height:18px;flex-shrink:0;margin-top:2px}.pricing-main-card .btn{width:100%;background:#fff;color:var(--epubxt-primary);font-weight:700;font-size:1.125rem;padding:1rem 2rem}.pricing-main-card .btn:hover{transform:translateY(-2px);box-shadow:0 10px 25px -5px #0003}.epubxt-enterprise-card{background:var(--gradient-primary);border-radius:var(--radius-2xl);padding:var(--space-10);display:flex;align-items:center;justify-content:space-between;gap:var(--space-10);color:var(--white);margin-top:2rem;position:relative;overflow:hidden}.epubxt-enterprise-card .enterprise-glow{position:absolute;top:-50%;right:-20%;width:60%;height:200%;background:radial-gradient(ellipse at center,rgba(255,255,255,.1) 0%,transparent 70%);animation:float 6s ease-in-out infinite}.epubxt-enterprise-card .enterprise-content{display:grid;grid-template-columns:1fr 1fr;gap:var(--space-10);flex:1;position:relative;z-index:1}.epubxt-enterprise-card .enterprise-badge{display:inline-block;padding:var(--space-1) var(--space-3);background:#fff3;border-radius:var(--radius-full);font-size:var(--text-xs);font-weight:var(--font-semibold);margin-bottom:var(--space-2)}.epubxt-enterprise-card .enterprise-name{font-size:var(--text-3xl);font-weight:var(--font-bold);margin-bottom:var(--space-1)}.epubxt-enterprise-card .enterprise-suitable{font-size:var(--text-sm);opacity:.9;margin-bottom:var(--space-3)}.epubxt-enterprise-card .enterprise-description{font-size:var(--text-base);opacity:.9;margin-bottom:var(--space-4)}.epubxt-enterprise-card .enterprise-features{display:grid;gap:var(--space-3);list-style:none;padding:0;margin:0}.epubxt-enterprise-card .enterprise-features li{display:flex;align-items:center;gap:var(--space-3);font-size:var(--text-sm);transition:transform var(--transition-fast)}.epubxt-enterprise-card .enterprise-features li:hover{transform:translate(4px)}.epubxt-enterprise-card .enterprise-features svg{width:18px;height:18px;flex-shrink:0}.epubxt-page .epubxt-enterprise-card .enterprise-cta{background:var(--white);color:var(--purple-primary);border:none;flex-shrink:0;position:relative;z-index:1}.epubxt-page .epubxt-enterprise-card .enterprise-cta:hover{background:var(--gray-100);transform:translateY(-2px)}.epubxt-cta{background:var(--epubxt-bg-alt);padding:6rem 0}.epubxt-cta .cta-card{position:relative;padding:5rem 3rem;border-radius:var(--radius-2xl);overflow:hidden;text-align:center;background:linear-gradient(135deg,var(--epubxt-primary),var(--epubxt-accent));box-shadow:0 25px 50px -12px #4f46e540}.epubxt-cta .cta-bg{position:absolute;top:0;right:0;bottom:0;left:0;z-index:0;overflow:hidden}.epubxt-cta .cta-gradient-1{position:absolute;top:0;right:0;bottom:0;left:0;width:100%;height:100%;background:linear-gradient(135deg,var(--epubxt-primary),var(--epubxt-accent))}.epubxt-cta .cta-gradient-2{position:absolute;top:-50%;right:-20%;width:80%;height:150%;background:radial-gradient(circle,rgba(255,255,255,.15) 0%,transparent 60%);animation:float 10s ease-in-out infinite}.epubxt-cta .cta-content{position:relative;z-index:1;color:#fff}.epubxt-cta h2{font-size:2.5rem;font-weight:800;margin-bottom:1rem;letter-spacing:-.02em}.epubxt-cta p{font-size:1.25rem;opacity:.9;margin-bottom:2.5rem;font-weight:500}.epubxt-cta .btn{background:#fff;color:var(--epubxt-primary);font-weight:700;font-size:1.125rem;padding:1rem 2.5rem}.epubxt-cta .btn:hover{transform:translateY(-2px);box-shadow:0 10px 25px -5px #0003}@media(max-width:1024px){.standards-grid,.epubxt-features-grid,.ai-features-grid{grid-template-columns:repeat(2,1fr)}.qc-steps{grid-template-columns:1fr;max-width:560px;margin-left:auto;margin-right:auto}.pricing-main-card{flex-direction:column;align-items:flex-start;gap:2rem}.errors-grid{grid-template-columns:1fr}}@media(max-width:768px){.epubxt-hero{padding:6rem 0 4rem}.epubxt-title{font-size:2.5rem}.standards-grid,.epubxt-features-grid,.ai-features-grid,.errors-grid{grid-template-columns:1fr}.error-example{grid-template-columns:1fr;text-align:center}.arrow-icon{transform:rotate(90deg);margin:0 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