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p{margin-bottom:.6rem}.ds-correction-body hr{border:none;border-top:2px solid rgba(67,185,127,.2);margin:1.5rem 0}.ds-correction-body blockquote{border-left:4px solid var(--accent);background:#43b97f0d;padding:.75rem 1.25rem;margin:1rem 0;border-radius:0 var(--radius-sm) var(--radius-sm) 0;font-style:italic}.ds-correction-body ol{list-style:none;counter-reset:corr-counter;padding-left:0}.ds-correction-body ol li{counter-increment:corr-counter;padding:.4rem 0 .4rem 2rem;position:relative}.ds-correction-body ol li:before{content:counter(corr-counter) ")";position:absolute;left:0;font-weight:700;color:var(--accent)}.ds-correction-body .katex-display{margin:1.2rem 0;overflow-x:auto}.ds-correction-body strong{color:var(--text)}.ds-correction-body code{background:var(--paper-2);padding:.15rem .4rem;border-radius:4px;font-size:.9rem}.ds-correction-body pre{background:var(--dark);color:#e0e0e0;padding:1rem 1.25rem;border-radius:var(--radius-sm);overflow-x:auto;margin:1rem 0}.ds-correction-body 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0}.auto-graph .math-svg{max-width:100%;height:auto;background:var(--paper-2);border-radius:10px;border:1px solid #e2e8f0;padding:4px}.math-svg .graph-grid{stroke:#e5e7eb;stroke-width:.5}.math-svg .graph-axis{stroke:#555;stroke-width:1.5}.math-svg .graph-tick{fill:#94a3b8}.math-svg .graph-label{fill:#475569}.math-svg .graph-point{fill:#1e293b;stroke:#fff;stroke-width:2}.math-svg .graph-fill{fill:#6366f114}.math-svg .graph-arrow-fill{fill:#64748b}[data-theme=dark] .auto-graph .math-svg{background:#1e293b;border-color:#334155}[data-theme=dark] .math-svg .graph-grid{stroke:#334155}[data-theme=dark] .math-svg .graph-axis{stroke:#94a3b8}[data-theme=dark] .math-svg .graph-tick{fill:#64748b}[data-theme=dark] .math-svg .graph-label{fill:#94a3b8}[data-theme=dark] .math-svg .graph-point{fill:#e2e8f0;stroke:#1e293b}[data-theme=dark] .math-svg .graph-fill{fill:#6366f126}[data-theme=dark] .math-svg 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.chapter-course-content{background:linear-gradient(135deg,#1a1a2e,#1e1e35);border-color:#6c63ff33}[data-theme=dark] .chapter-course-content strong{color:#e0e0f0}[data-theme=dark] .chapter-course-content blockquote{background:#6c63ff1a}[data-theme=dark] .chapter-course-content code{background:#2a2a3e}[data-theme=dark] .chapter-course-content th{background:#6c63ff}[data-theme=dark] .chapter-course-content td{border-color:#3a3a4e}[data-theme=dark] .subject-progress-item{border-bottom-color:#2a2a3e}[data-theme=dark] .message-item.unread{background:#6c63ff0f}[data-theme=dark] .message-item:hover{background:#13131a}[data-theme=dark] .alert-error{background:#ff65841a;border-color:#ff658433}[data-theme=dark] .alert-success{background:#43b97f1a;border-color:#43b97f33}[data-theme=dark] .difficulty-dot{background:#2a2a3e}[data-theme=dark] .stat-icon.purple{background:#6c63ff26}[data-theme=dark] .stat-icon.pink{background:#ff658426}[data-theme=dark] 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.75rem;cursor:pointer;font-size:1.1rem;transition:var(--transition);display:flex;align-items:center;gap:.3rem;color:var(--text)}.theme-toggle:hover{border-color:var(--primary);background:#6c63ff0d;transform:scale(1.05)}.contact-section{position:relative}.contact-grid{display:grid;grid-template-columns:1fr 1.5fr;gap:3rem;align-items:start}.contact-info{display:flex;flex-direction:column;gap:1.5rem}.contact-info-card{background:var(--card);border-radius:var(--radius);padding:1.5rem;box-shadow:var(--shadow);display:flex;align-items:center;gap:1rem;transition:var(--transition)}[data-theme=dark] .contact-info-card{background:#1a1a28}.contact-info-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover)}.contact-info-icon{width:56px;height:56px;border-radius:14px;display:flex;align-items:center;justify-content:center;font-size:1.5rem;background:#6c63ff1a;flex-shrink:0}.contact-info-text h4{font-size:.95rem;margin-bottom:.2rem}.contact-info-text p{font-size:.9rem;color:var(--text-light)}.contact-card{background:var(--card);border-radius:var(--radius);padding:2.5rem;box-shadow:var(--shadow-lg);position:relative;overflow:hidden}.contact-card:before{content:"";position:absolute;top:0;left:0;width:100%;height:4px;background:linear-gradient(90deg,var(--primary),var(--secondary),var(--accent))}.contact-card h3{font-size:1.4rem;margin-bottom:1.5rem}.contact-card .form-group{margin-bottom:1rem}.contact-success{text-align:center;padding:2rem;animation:fadeInUp .5s ease}.contact-success .success-icon{font-size:4rem;margin-bottom:1rem}@media (max-width: 768px){.contact-grid{grid-template-columns:1fr}}.testimonials-section{background:linear-gradient(180deg,#6c63ff08,#ff658408);position:relative;overflow:hidden}.avis-deco{position:absolute;border-radius:50%;filter:blur(80px);pointer-events:none;z-index:0}.avis-deco-1{width:400px;height:400px;background:#6c63ff14;top:-100px;right:-100px;animation:decoFloat 16s ease-in-out infinite}.avis-deco-2{width:300px;height:300px;background:#ff65840f;bottom:-80px;left:-80px;animation:decoFloat 20s ease-in-out infinite reverse}@keyframes decoFloat{0%,to{transform:translate(0) scale(1)}50%{transform:translate(30px,-20px) scale(1.1)}}.testimonials-section .container{position:relative;z-index:1}.section-badge{display:inline-block;background:linear-gradient(135deg,#6c63ff1a,#ff65841a);color:var(--primary);padding:.5rem 1.25rem;border-radius:50px;font-size:.85rem;font-weight:600;margin-bottom:1rem;border:1px solid rgba(108,99,255,.15);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}.avis-stats{display:flex;align-items:center;justify-content:center;gap:2rem;margin-bottom:3rem;background:var(--card);border-radius:16px;padding:1.25rem 2.5rem;box-shadow:0 4px 30px #6c63ff14;max-width:550px;margin-left:auto;margin-right:auto;border:1px solid rgba(108,99,255,.08)}.avis-stat-item{text-align:center}.avis-stat-number{display:block;font-size:1.6rem;font-weight:800;background:linear-gradient(135deg,var(--primary),var(--secondary));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;line-height:1.2}.avis-stat-label{font-size:.78rem;color:var(--text-light);font-weight:500;letter-spacing:.02em}.avis-stat-divider{width:1px;height:36px;background:linear-gradient(to bottom,transparent,var(--primary-light),transparent);opacity:.3}.geo-fig{display:block;width:100%;max-width:360px;height:auto;margin:1.1rem auto;color:inherit;overflow:visible}.geo-fig text{fill:currentColor;font-family:inherit;font-size:13px}.geo-fig .accent{stroke:#6366f1}.geo-fig .accent-fill{fill:#6366f1}.testimonials-carousel-wrapper{position:relative;margin-bottom:1.5rem}.testimonials-carousel{display:flex;gap:1.5rem;overflow-x:auto;scroll-snap-type:x mandatory;scroll-behavior:smooth;padding:1rem .5rem 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