.container{width:100%;max-width:1200px;margin:0 auto;padding:0 2rem;box-sizing:border-box}.lesson-hero{position:relative;padding:180px 0 100px;color:#fff;background-color:#000;overflow:hidden}.lesson-hero-bg{position:absolute;top:0;left:0;width:100%;height:100%;background-size:cover;background-position:center;opacity:.4;z-index:1}.lesson-hero-content{position:relative;z-index:2;text-align:center;max-width:900px;margin:0 auto}.lesson-label{font-family:var(--font-en);font-size:1rem;letter-spacing:.3em;color:#fff;margin-bottom:20px;display:block;text-shadow:0 2px 4px rgba(0,0,0,.5)}.lesson-title{font-size:clamp(2.5rem,6vw,4.5rem);line-height:1.1;margin-bottom:20px;font-weight:800;text-shadow:0 4px 10px rgba(0,0,0,.5)}.lesson-subtitle{font-size:clamp(1.2rem,3vw,1.8rem);font-weight:300;opacity:.9;margin-bottom:40px;text-shadow:0 2px 4px rgba(0,0,0,.5)}.intro-section{padding:100px 0;background:#fff}.intro-text{font-size:1.2rem;line-height:2;color:var(--text-main);text-align:center;max-width:800px;margin:0 auto}.intro-text p{margin-bottom:0}.features-section{padding:0 0 100px;background:#fff}.feature-item{display:flex;align-items:center;gap:60px;margin-bottom:100px}.feature-item:nth-child(2n){flex-direction:row-reverse}.feature-img{flex:1;height:400px;border-radius:20px;background-size:cover;background-position:center;box-shadow:0 20px 50px #0000001a;transition:transform .3s ease}.feature-item:hover .feature-img{transform:scale(1.02)}.feature-text{flex:1}.feature-title{font-size:2rem;margin-bottom:20px;color:var(--accent-blue);font-weight:700}.feature-desc{font-size:1rem;line-height:1.8;color:var(--text-muted)}.benefits-section{padding:100px 0;background:#f8f9fa;overflow:visible}.section-head{text-align:center;margin-bottom:60px}.section-label{font-family:var(--font-en);color:var(--accent-blue);letter-spacing:.2em;font-weight:600;display:block;margin-bottom:10px}.section-h2{font-size:2.5rem;color:var(--text-main)}.benefits-list{display:grid;grid-template-columns:repeat(3,1fr);gap:30px;max-width:1000px;margin:0 auto}.benefit-card{background:#fff;padding:40px 30px;border-radius:20px;box-shadow:0 10px 30px #0000000d;text-align:center;border:1px solid rgba(0,0,0,.05);height:100%;display:flex;flex-direction:column;align-items:center}.benefit-icon{font-size:3rem;margin-bottom:20px;display:block}.benefit-text{font-weight:600;color:var(--text-main);line-height:1.6}.lesson-nav{display:flex;justify-content:space-between;align-items:center;padding:60px 0;border-top:1px solid #eee;background:#fff;width:100%;gap:20px}.nav-btn{display:inline-flex;align-items:center;justify-content:center;gap:15px;text-decoration:none;color:var(--text-main);font-weight:600;transition:all .3s;padding:15px 30px;border-radius:50px;border:1px solid #eee;background:#fff;min-width:200px}.nav-btn:hover{background:var(--accent-blue);color:#fff;border-color:var(--accent-blue)}.btn-disabled{opacity:.3;pointer-events:none}.cta-section{padding:100px 0;text-align:center;background:linear-gradient(135deg,#0058a5,#036);color:#fff;width:100%}.cta-inner h2{color:#fff;font-size:2.5rem;margin-bottom:20px}.cta-inner p{color:#fffc;margin-bottom:40px}.btn-cta{background:#fff;color:var(--accent-blue);padding:20px 60px;border-radius:50px;text-decoration:none;font-weight:700;display:inline-block;transition:all .3s;box-shadow:0 10px 30px #0003}.btn-cta:hover{transform:translateY(-5px) scale(1.05);box-shadow:0 20px 50px #0006}@media(max-width:900px){.feature-item,.feature-item:nth-child(2n){flex-direction:column;gap:30px}.feature-img{width:100%;height:300px}.benefits-list{grid-template-columns:1fr}.lesson-title{font-size:2.5rem}.lesson-subtitle{font-size:1.2rem}.nav-btn{padding:10px 20px;font-size:.9rem;min-width:auto;width:100%}.lesson-nav{flex-direction:column;gap:15px}}