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.word-with-note:after{content:"";position:absolute;bottom:-2px;left:0;right:0;height:2px;background:var(--accent-color);border-radius:1px}.app{min-height:100vh;background-color:var(--primary-color);color:var(--text-primary);transition:all .3s ease}.header{position:fixed;top:0;left:0;right:0;z-index:1000;background-color:var(--primary-color);border-bottom:1px solid var(--border-primary);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}.header-content{max-width:1200px;margin:0 auto;padding:1rem 2rem;display:flex;justify-content:space-between;align-items:center}.logo{display:flex;align-items:center;gap:.5rem}.logo-icon{width:32px;height:32px;object-fit:contain}.logo h1{font-size:1.5rem;font-weight:700;color:var(--ornament-color);margin:0}.nav{display:flex;align-items:center;gap:2rem}.nav-link{color:var(--text-secondary);text-decoration:none;font-weight:500;transition:color .3s ease;padding:.5rem 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.theme-slider{border-color:var(--ornament-color)}.hero{padding:10rem 2rem 2rem;text-align:center;background-color:var(--assist-color)}.hero-content{max-width:800px;margin:0 auto}.hero-title{font-size:3rem;font-weight:700;color:var(--text-primary);margin-bottom:1.5rem;line-height:1.2}.hero-description{font-size:1.2rem;color:var(--text-secondary);line-height:1.6;margin-bottom:0}.features{padding:4rem 2rem}.features-content{max-width:1200px;margin:0 auto;text-align:center}.features-content h3{font-size:2.5rem;font-weight:700;color:var(--text-primary);margin-bottom:3rem}.features-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:2rem}.feature-item{padding:2rem;background-color:var(--assist-color);border-radius:12px;border:1px solid var(--border-primary);transition:all .3s ease}.feature-item:hover{transform:translateY(-4px);box-shadow:0 12px 24px #0000001a;border-color:var(--ornament-color)}.feature-icon{font-size:2.5rem;margin-bottom:1rem}.feature-item h4{font-size:1.2rem;font-weight:600;color:var(--text-primary);margin-bottom:.75rem}.feature-item p{color:var(--text-secondary);line-height:1.6;margin:0}.download{padding:2rem;text-align:center;background-color:var(--assist-color)}.player-demo-section{padding:1rem 2rem;background-color:var(--assist-color)}.player-demo-header{max-width:1400px;margin:0 auto .5rem;display:flex;justify-content:space-between;align-items:center}.player-desc{color:var(--text-secondary);font-size:.75rem;opacity:.7;margin:0}.theme-switcher{display:flex;align-items:center;gap:8px}.theme-switch-button{width:20px;height:20px;border-radius:50%;border:2px solid var(--border-primary);cursor:pointer;transition:all .2s ease;padding:0;background:none;position:relative}.theme-switch-button:hover{border-color:var(--ornament-color);transform:scale(1.1);box-shadow:0 2px 8px #0003}.theme-switch-button.active{border-color:var(--ornament-color);border-width:3px;box-shadow:0 0 0 2px var(--ornament-10),0 2px 8px #0000004d;transform:scale(1.15)}.theme-switch-button:active{transform:scale(1.05)}.footer{padding:1rem;text-align:center;border-top:1px solid var(--border-primary);background-color:var(--assist-color)}.footer-content{max-width:1200px;margin:0 auto}.footer-content p{color:var(--text-secondary);font-size:.9rem;margin:0}.download-content{max-width:600px;margin:0 auto}.download-content h3{font-size:2.5rem;font-weight:700;color:#fff;margin-bottom:1rem}.download-content p{font-size:1.1rem;color:#ffffffe6;margin-bottom:2rem}.download-btn{background-color:var(--ornament-color);color:#fff;border:none;padding:.75rem 1.5rem;font-size:1rem;font-weight:500;border-radius:6px;cursor:pointer;transition:all .3s ease}.download-btn:hover{background-color:var(--ornament-color);transform:translateY(-2px);box-shadow:0 4px 12px #00000026}.download-content{display:flex;flex-direction:column;align-items:center;gap:.5rem}.version-info{display:flex;gap:.5rem;align-items:center;font-size:.8rem;color:var(--text-secondary);opacity:.8}.version{font-weight:500}.release-date{font-size:.75rem}@media(max-width:768px){.header-content{padding:1rem}.nav{gap:1rem}.hero{padding:8rem 1rem 1.5rem}.hero-title{font-size:2rem}.hero-description{font-size:1rem}.player-demo-section{padding:2rem 1rem}.player-demo-header{margin-bottom:.5rem}.player-desc{font-size:.7rem}.player-container{flex-direction:column;gap:0}.subtitle-panel{width:100%;border-left:none;border-top:1px solid var(--border-primary);max-width:none;flex:none}.player-area{width:100%}.features-content h3{font-size:2rem}.features-grid{grid-template-columns:1fr;gap:1.5rem}.download-content h3{font-size:2rem}}@media(max-width:480px){.hero-title{font-size:1.5rem}.nav{flex-direction:column;gap:.5rem}.nav-link{padding:.25rem .5rem;font-size:.9rem}.theme-slider{width:40px;height:20px}.theme-slider-thumb{width:16px;height:16px}.theme-slider.light .theme-slider-thumb{transform:translate(20px)}.footer{padding:1rem}.footer-content p{font-size:.8rem}.version-info{font-size:.75rem}.release-date{font-size:.7rem}}