:root{--primary:#FF0000;--primary-hover:#CC0000;--bg-main:#F9F9F9;--bg-card:#FFFFFF;--text-main:#0F0F0F;--text-muted:#606060;--border-color:#E5E5E5;--radius-lg:12px;--radius-md:8px;--font-sans:'Inter',-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;--shadow:0 4px 20px rgba(0, 0, 0, 0.05)}*{box-sizing:border-box;margin:0;padding:0}body{font-family:var(--font-sans);background-color:var(--bg-main);color:var(--text-main);line-height:1.6;-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}header{background-color:var(--bg-card);border-bottom:1px solid var(--border-color);position:sticky;top:0;z-index:100}.nav-container{max-width:1200px;margin:0 auto;padding:0 20px;height:70px;display:flex;align-items:center;justify-content:space-between}.logo{display:flex;align-items:center;font-weight:700;font-size:1.25rem;color:var(--text-main);gap:8px}.logo svg{fill:var(--primary);width:32px;height:32px}.nav-links{display:flex;gap:24px;list-style:none;font-weight:500;font-size:.95rem}.nav-links a:hover{color:var(--primary)}.container{max-width:1200px;margin:0 auto;padding:40px 20px}.hero{text-align:center;max-width:800px;margin:0 auto 40px auto}.hero h1{font-size:2.5rem;font-weight:700;margin-bottom:16px;letter-spacing:-.5px}.hero p{color:var(--text-muted);font-size:1.1rem}.tool-box{background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-lg);padding:30px;box-shadow:var(--shadow);margin-bottom:50px}.upload-zone{border:2px dashed #ccc;border-radius:var(--radius-md);padding:40px 20px;text-align:center;cursor:pointer;background:#fafafa;transition:all .2s ease;position:relative}.upload-zone.dragover,.upload-zone:hover{border-color:var(--primary);background:#fff5f5}.upload-zone svg{width:48px;height:48px;fill:var(--text-muted);margin-bottom:12px}.upload-zone p{font-weight:500;margin-bottom:6px}.upload-zone span{font-size:.85rem;color:var(--text-muted)}.upload-zone input[type=file]{position:absolute;top:0;left:0;width:100%;height:100%;opacity:0;cursor:pointer}.controls{display:flex;justify-content:center;gap:16px;margin-top:24px;flex-wrap:wrap}.btn{font-family:var(--font-sans);font-weight:600;font-size:.95rem;padding:12px 24px;border-radius:var(--radius-md);border:none;cursor:pointer;display:inline-flex;align-items:center;gap:8px;transition:background .2s}.btn-primary{background-color:var(--primary);color:#fff}.btn-primary:hover{background-color:var(--primary-hover)}.btn-secondary{background-color:#ececec;color:var(--text-main)}.btn-secondary:hover{background-color:#e0e0e0}.btn:disabled{opacity:.5;cursor:not-allowed}.preview-grid{display:grid;grid-template-columns:repeat(12,1fr);gap:30px;margin-top:40px}.preview-card{background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-md);padding:20px;box-shadow:0 2px 10px rgba(0,0,0,.02)}.preview-card h3{font-size:1.1rem;margin-bottom:16px;font-weight:600;display:flex;align-items:center;gap:8px;color:var(--text-main)}.col-desktop{grid-column:span 7}.col-mobile{grid-column:span 5}.col-tv{grid-column:span 12}.yt-mockup{background-color:#fff;width:100%;overflow:hidden;position:relative;font-family:Roboto,Arial,sans-serif}.placeholder-thumb{width:100%;aspect-ratio:16/9;background:#eaeaea;display:flex;align-items:center;justify-content:center;color:#888;font-size:.9rem;font-weight:500;border-radius:8px}.active-thumb{width:100%;height:100%;object-fit:cover;display:block}.desktop-video-card{max-width:360px;margin:0 auto}.desktop-thumb-wrapper{position:relative;aspect-ratio:16/9;border-radius:12px;overflow:hidden}.yt-timestamp{position:absolute;bottom:8px;right:8px;background:rgba(0,0,0,.8);color:#fff;padding:3px 6px;font-size:12px;font-weight:500;border-radius:4px}.desktop-meta{display:flex;margin-top:12px;gap:12px}.channel-avatar{width:36px;height:36px;border-radius:50%;background:#d9d9d9;flex-shrink:0}.meta-text{flex-grow:1}.video-title{font-size:14px;font-weight:500;line-height:1.4;margin-bottom:4px;color:#0f0f0f;display:-webkit-box;-webkit-box-orient:vertical;overflow:hidden}.channel-name,.video-stats{font-size:12px;color:#606060;line-height:1.4}.mobile-video-card{max-width:100%}.mobile-thumb-wrapper{position:relative;aspect-ratio:16/9;overflow:hidden}.mobile-meta{display:flex;padding:12px;gap:12px}.tv-wrapper-container{max-width:800px;margin:0 auto}.tv-frame{background:#0f0f0f;padding:24px;border-radius:16px;box-shadow:inset 0 0 40px rgba(255,255,255,.05)}.tv-canvas-screen{position:relative;width:100%;aspect-ratio:16/9;background-size:cover;background-position:center;border-radius:4px;overflow:hidden}.tv-overlay-scrim{position:absolute;top:0;left:0;width:100%;height:100%;background:linear-gradient(75deg,rgba(0,0,0,.85) 0,rgba(0,0,0,.4) 50%,rgba(0,0,0,0) 100%);display:flex;flex-direction:column;justify-content:center;padding:8% 10%;box-sizing:border-box}.tv-meta{max-width:45%;color:#f1f1f1}.tv-title{font-size:2rem;font-weight:700;margin-bottom:12px;line-height:1.2}.tv-badges{font-size:.9rem;color:#aaa;margin-bottom:24px}.tv-buttons{display:flex;gap:12px}.tv-btn{background:rgba(255,255,255,.1);color:#fff;padding:12px 24px;border-radius:24px;font-size:.95rem;font-weight:700}.tv-btn.white-btn{background:#fff;color:#0f0f0f}.info-section{margin-bottom:50px;background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-lg);padding:40px}.info-section h2{font-size:1.8rem;margin-bottom:16px;font-weight:700}.info-section p{color:var(--text-muted);margin-bottom:16px;font-size:1.05rem}.faq-section{margin-bottom:50px}.faq-section h2{font-size:1.8rem;margin-bottom:24px;font-weight:700;text-align:center}.faq-grid{display:flex;flex-direction:column;gap:16px;max-width:850px;margin:0 auto}.faq-item{background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-md);padding:24px}.faq-item h3{font-size:1.15rem;margin-bottom:8px;font-weight:600;color:var(--text-main)}.faq-item p{color:var(--text-muted);font-size:1rem}footer{background:var(--bg-card);border-top:1px solid var(--border-color);padding:40px 20px 30px 20px;color:var(--text-muted);font-size:.9rem}.footer-container{max-width:1200px;margin:0 auto;display:flex;flex-direction:column;align-items:center;gap:20px}.footer-links{display:flex;gap:20px;flex-wrap:wrap;justify-content:center;list-style:none}.footer-links a:hover{color:var(--primary)}.copyright{font-size:.85rem;color:#909090}@media (max-width:992px){.col-desktop{grid-column:span 12}.col-mobile{grid-column:span 12}.hero h1{font-size:2rem}.tv-title{font-size:1.3rem}}@media (max-width:600px){.nav-links{display:none}.hero h1{font-size:1.75rem}.tool-box{padding:16px}.info-section{padding:24px}.tv-frame{padding:10px}.tv-meta{max-width:75%}.tv-btn{display:none}}