:root{--color-primary-500:#1976d2;--color-primary-700:#0050b3;--color-primary-hover:#1565c0;--color-secondary-500:#00c4a7;--color-secondary-100:#d4f7ff;--color-success:#36b37e;--color-warning:#ffab00;--color-error:#d32f2f;--color-background-default:#f4f6ff;--color-surface-white:#fff;--color-text-primary:#212529;--color-text-secondary:#6c757d;--color-border-default:#ced4da;--color-border-light:#e9ecef;--shadow-sm:0 2px 4px #0000000f;--shadow-md:0 4px 12px #00000014;--shadow-lg:0 8px 24px #0000001f;--spacing-xs:8px;--spacing-sm:12px;--spacing-md:16px;--spacing-lg:24px;--spacing-xl:32px;--radius-sm:4px;--radius-md:8px;--radius-lg:12px;--radius-xl:16px;--transition-fast:150ms ease;--transition-base:250ms ease;--transition-slow:350ms ease}*{box-sizing:border-box}body{-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;background-color:#f4f6ff;background-color:var(--color-background-default);color:#212529;color:var(--color-text-primary);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif;line-height:1.6;margin:0}code{font-family:source-code-pro,Menlo,Monaco,Consolas,Courier New,monospace}.text-center{text-align:center}.mt-lg{margin-top:24px;margin-top:var(--spacing-lg)}.mb-lg{margin-bottom:24px;margin-bottom:var(--spacing-lg)}.App{align-items:center;background:var(--color-background-default);display:flex;flex-direction:column;min-height:100vh;padding:var(--spacing-lg)}.container{margin:0 auto;max-width:900px;width:100%}.header{background:var(--color-surface-white);border-radius:var(--radius-xl);box-shadow:var(--shadow-md);color:var(--color-text-primary);margin-bottom:var(--spacing-xl);padding:var(--spacing-lg);text-align:center}.header h1{align-items:center;color:var(--color-primary-700);display:flex;font-size:2.5rem;font-weight:700;gap:var(--spacing-sm);justify-content:center;margin-bottom:var(--spacing-sm)}.header p{color:var(--color-text-secondary);font-size:1.1rem;margin:0}.card{background:var(--color-surface-white);border-radius:var(--radius-xl);box-shadow:var(--shadow-lg);margin-bottom:var(--spacing-lg);padding:var(--spacing-xl);transition:transform var(--transition-base),box-shadow var(--transition-base)}.card:hover{box-shadow:0 12px 32px #00000026;transform:translateY(-2px)}.upload-area{background:var(--color-background-default);border:3px dashed var(--color-border-default);border-radius:var(--radius-lg);cursor:pointer;padding:var(--spacing-xl) var(--spacing-lg);text-align:center;transition:all var(--transition-base)}.upload-area:hover{transform:translateY(-2px)}.upload-area.dragging,.upload-area:hover{background:var(--color-secondary-100);border-color:var(--color-primary-500)}.upload-area.dragging{border-width:4px;transform:scale(1.02)}.upload-icon{animation:float 3s ease-in-out infinite;color:var(--color-primary-500);font-size:4rem;margin-bottom:var(--spacing-md)}@keyframes float{0%,to{transform:translateY(0)}50%{transform:translateY(-10px)}}.upload-text h3{color:var(--color-text-primary);font-size:1.5rem;font-weight:600;margin-bottom:var(--spacing-sm)}.upload-text p{color:var(--color-text-secondary);margin-bottom:var(--spacing-md)}.file-info{background:#f0f2ff;border-radius:8px;margin:20px 0;padding:20px}.file-info p{color:#333;margin:8px 0}.button{background:var(--color-primary-500);border:none;border-radius:var(--radius-md);box-shadow:var(--shadow-sm);color:#fff;cursor:pointer;font-size:1rem;font-weight:600;overflow:hidden;padding:var(--spacing-sm) var(--spacing-lg);position:relative;transition:all var(--transition-base)}.button:before{background:linear-gradient(90deg,#0000,#fff3,#0000);content:"";height:100%;left:-100%;position:absolute;top:0;transition:left var(--transition-slow);width:100%}.button:hover:before{left:100%}.button:hover{background:var(--color-primary-hover);box-shadow:0 6px 20px #1976d259;transform:translateY(-2px)}.button:active{transform:translateY(0)}.button:disabled{cursor:not-allowed;opacity:.5;transform:none}.progress-container{margin:30px 0}.progress-bar{background:var(--color-border-light);border-radius:var(--radius-xl);height:32px;margin:var(--spacing-md) 0;width:100%}.progress-bar,.progress-fill{overflow:hidden;position:relative}.progress-fill{align-items:center;background:linear-gradient(90deg,var(--color-primary-500),var(--color-secondary-500));color:#fff;display:flex;font-weight:600;height:100%;justify-content:center;transition:width .5s cubic-bezier(.4,0,.2,1)}.progress-fill:after{animation:shimmer 2s infinite;background:linear-gradient(90deg,#0000,#ffffff4d,#0000);bottom:0;content:"";left:0;position:absolute;right:0;top:0}@keyframes shimmer{0%{transform:translateX(-100%)}to{transform:translateX(100%)}}.status-message{color:#333;font-size:1.1rem;margin:15px 0;text-align:center}.video-container{grid-gap:20px;display:grid;gap:20px;grid-template-columns:1fr 1fr;margin:30px 0}@media (max-width:768px){.video-container{grid-template-columns:1fr}}.video-wrapper{background:#000;border-radius:8px;overflow:hidden}.video-wrapper h3{background:#667eea;color:#fff;margin:0;padding:15px;text-align:center}.video-wrapper video{display:block;width:100%}.report-section{background:#f8f9ff;border-radius:12px;margin:30px 0;padding:30px}.report-section h2{color:#667eea;margin-bottom:20px}.report-content{background:#fff;border-radius:8px;color:#333;font-family:Courier New,monospace;line-height:1.6;overflow-x:auto;padding:20px;white-space:pre-wrap}.error-message{background:#fee;border:2px solid #f88;border-radius:8px;color:#c33;margin:20px 0;padding:20px;text-align:center}.loading-spinner{animation:spin 1s linear infinite;border:4px solid #667eea4d;border-radius:50%;border-top-color:#667eea;display:inline-block;height:40px;margin:20px auto;width:40px}@keyframes spin{to{transform:rotate(1turn)}}.tips-section{background:#fff9e6;border-left:4px solid #ffc107;border-radius:4px;margin:20px 0;padding:20px}.tips-section h4{color:#f57c00;margin-bottom:10px}.tips-section ul{margin:10px 0;padding-left:20px}.tips-section li{color:#666;margin:8px 0}
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