/* 现代化配色方案 */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
        body {
            font-family: 'SimSun', '宋体', serif;
            background: #f9fafb;
            background-image: 
                linear-gradient(rgba(59, 130, 246, 0.1) 1px, transparent 1px),
                linear-gradient(90deg, rgba(59, 130, 246, 0.1) 1px, transparent 1px);
            background-size: 20px 20px;
            color: #1f2937;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
            align-items: center;
            padding: 20px;
            overflow-x: hidden;
        }
        
        .container {
            width: 100%;
            max-width: 1800px;
        }
        
        .header {
            text-align: center;
            margin-bottom: 30px;
            background: white;
            border: 1px solid #e5e7eb;
            border-radius: 16px;
            box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
            padding: 30px;
            transition: all 0.3s ease;
        }
        
        .header h1 {
            color: #1f2937;
            font-size: 32px;
            font-weight: 700;
            margin-bottom: 10px;
        }
        
        .header p {
            color: #6b7280;
            font-size: 20px;
            margin-bottom: 0;
            font-weight: 400;
        }
        
        .main-content {
            display: grid;
            grid-template-columns: 1fr 420px;
            gap: 30px;
            width: 100%;
            margin-bottom: 20px;
        }
        
        .animation-area {
            background: white;
            border: 1px solid #e5e7eb;
            border-radius: 16px;
            box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
            padding: 30px;
            display: flex;
            justify-content: center;
            align-items: center;
            transition: all 0.3s ease;
        }
        
        .animation-canvas {
            width: 100%;
            height: 500px;
            border: none;
            border-radius: 12px;
            background: #fafafa;
        }
        
        .control-panel {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }
        
        .control-group {
            background: white;
            border-radius: 12px;
            padding: 25px;
            border: 1px solid #e5e7eb;
            box-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
            transition: all 0.3s ease;
        }
        
        .control-group:hover {
            transform: translateY(-2px);
            box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
        }
        
        .control-label {
            color: #1f2937;
            font-size: 20px;
            font-weight: 600;
            margin-bottom: 15px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        
        .modern-btn {
            width: 100%;
            background: linear-gradient(135deg, #3b82f6, #1d4ed8);
            color: white;
            border: none;
            padding: 12px 24px;
            border-radius: 8px;
            cursor: pointer;
            font-size: 18px;
            font-weight: 600;
            font-family: 'SimSun', '宋体', serif;
            transition: all 0.3s ease;
            margin: 4px 0;
            box-shadow: 0 2px 8px rgba(59, 130, 246, 0.4);
        }
        
        .modern-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 4px 12px rgba(59, 130, 246, 0.6);
        }
        
        .modern-btn:active {
            transform: translateY(0);
        }
        
        .modern-btn.active {
            background: linear-gradient(135deg, #1d4ed8, #3b82f6);
            box-shadow: 0 4px 12px rgba(29, 78, 216, 0.5);
        }
        
        .radius-control, .segment-control, .speed-control {
            margin: 15px 0;
        }
        
        .radius-slider, .segment-slider, .speed-slider {
            width: 100%;
            height: 8px;
            background: #e5e7eb;
            border-radius: 10px;
            outline: none;
            appearance: none;
            transition: all 0.3s ease;
            margin: 10px 0;
        }

        .footer {
            background: linear-gradient(to right);
            color: #0c0302;
            text-align: center;
            padding: 10px;
            margin-top: 15px;
            border-radius: 0 0 10px 10px;
        }
        
        .radius-slider::-webkit-slider-thumb,
        .segment-slider::-webkit-slider-thumb,
        .speed-slider::-webkit-slider-thumb {
            -webkit-appearance: none;
            width: 24px;
            height: 24px;
            background: linear-gradient(135deg, #3b82f6, #1d4ed8);
            border-radius: 50%;
            cursor: pointer;
            border: 2px solid white;
            box-shadow: 0 2px 8px rgba(59, 130, 246, 0.4);
            transition: all 0.3s ease;
        }
        
        .speed-slider::-webkit-slider-thumb:hover {
            transform: scale(1.1);
            box-shadow: 0 4px 12px rgba(59, 130, 246, 0.6);
        }
        
        .radius-value, .segment-value, .speed-value {
            text-align: center;
            font-weight: 600;
            color: #1e1e2f;
            font-size: 18px;
            font-family: 'SimSun', '宋体', serif;
            margin: 8px 0;
            padding: 8px;
            background: rgba(66, 133, 244, 0.1);
            border-radius: 8px;
        }
        
        
        .step-indicator {
            background: white;
            border: 1px solid #e5e7eb;
            border-radius: 12px;
            padding: 20px;
            box-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
            text-align: center;
        }
        
        .step-indicator h3 {
            color: #3b82f6;
            margin-bottom: 10px;
            font-size: 20px;
            font-weight: 600;
            font-family: 'SimSun', '宋体', serif;
        }
        
        .step-text {
            font-size: 18px;
            color: #1e1e2f;
            line-height: 1.5;
            font-family: 'SimSun', '宋体', serif;
        }
        
        /* GSAP动画样式 */
        .sector-element {
            cursor: pointer;
        }
        
        .animation-element {
            will-change: transform, opacity;
        }

        @media (max-width: 1200px) {
            .main-content {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            
            .control-panel {
                order: -1;
            }
        }
        
        @media (max-width: 768px) {
            .header h1 {
                font-size: 28px;
            }
            
            .animation-canvas {
                height: 400px;
            }
            
            .control-group {
                padding: 20px;
            }
        }