* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            font-family: 'PingFang SC', 'Microsoft YaHei', sans-serif;
            background: linear-gradient(135deg, #74b9ff 0%, #0984e3 100%);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

        .header {
            background: rgba(255, 255, 255, 0.15);
            backdrop-filter: blur(10px);
            padding: 25px;
            text-align: center;
            color: white;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
        }

        .header h1 {
            font-size: 32px;
            margin-bottom: 10px;
            font-weight: 600;
        }

        .header p {
            font-size: 18px;
            opacity: 0.9;
        }

        .main-container {
            display: flex;
            flex: 1;
            gap: 25px;
            padding: 25px;
            max-width: 1600px;
            margin: 0 auto;
            width: 100%;
        }

        .canvas-container {
            flex: 1;
            background: white;
            border-radius: 20px;
            box-shadow: 0 15px 40px rgba(0, 0, 0, 0.15);
            padding: 30px;
            position: relative;
        }

        #geometryCanvas {
            width: 100%;
            height: 650px;
            border: 3px solid #e8f4fd;
            border-radius: 15px;
            background: #fafbfc;
            cursor: crosshair;
        }

        .control-panel {
            width: 380px;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(15px);
            border-radius: 20px;
            box-shadow: 0 15px 40px rgba(0, 0, 0, 0.15);
            padding: 30px;
            height: fit-content;
        }

        .control-group {
            margin-bottom: 30px;
            padding: 25px;
            background: rgba(255, 255, 255, 0.9);
            border-radius: 15px;
            box-shadow: 0 8px 25px rgba(0, 0, 0, 0.08);
        }

        .control-label {
            font-size: 18px;
            font-weight: 600;
            color: #2c3e50;
            margin-bottom: 18px;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .transform-buttons {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 12px;
            margin-bottom: 20px;
        }

        .transform-btn {
            padding: 15px 20px;
            border: none;
            border-radius: 12px;
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            background: #f8f9fa;
            color: #6c757d;
            border: 2px solid transparent;
        }

        .transform-btn.active {
            background: #44C1FF;
            color: white;
            transform: translateY(-3px);
            box-shadow: 0 8px 20px rgba(68, 193, 255, 0.4);
            border-color: #44C1FF;
        }

        .transform-btn:hover:not(.active) {
            background: #e9ecef;
            transform: translateY(-1px);
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
        }

        .parameter-display {
            background: #f8f9fa;
            border-radius: 10px;
            padding: 20px;
            margin-bottom: 20px;
        }

        .param-row {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 12px;
            font-size: 16px;
        }

        .param-label {
            color: #495057;
            font-weight: 500;
        }

        .param-value {
            background: #44C1FF;
            color: white;
            padding: 6px 12px;
            border-radius: 8px;
            font-weight: 600;
            font-family: 'Courier New', monospace;
            min-width: 80px;
            text-align: center;
        }

        .action-buttons {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
        }

        .action-btn {
            flex: 1;
            padding: 15px 20px;
            border: none;
            border-radius: 12px;
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            min-width: 120px;
        }

        .reset-btn {
            background: #ff6b6b;
            color: white;
        }

        .reset-btn:hover {
            background: #ff5252;
            transform: translateY(-2px);
            box-shadow: 0 6px 16px rgba(255, 107, 107, 0.4);
        }

        .demo-btn {
            background: #51cf66;
            color: white;
        }

        .demo-btn:hover {
            background: #40c057;
            transform: translateY(-2px);
            box-shadow: 0 6px 16px rgba(81, 207, 102, 0.4);
        }

        .info-panel {
            background: rgba(255, 255, 255, 0.95);
            border-radius: 15px;
            padding: 25px;
            margin-top: 25px;
            border: 2px solid #e8f4fd;
        }

        .info-title {
            font-size: 18px;
            font-weight: 600;
            color: #2c3e50;
            margin-bottom: 18px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .coordinate-display {
            display: grid;
            grid-template-columns: 1fr 1fr 1fr;
            gap: 15px;
            margin-bottom: 20px;
        }

        .coord-item {
            background: #f8f9fa;
            padding: 15px;
            border-radius: 10px;
            text-align: center;
            border: 2px solid #e9ecef;
        }

        .coord-label {
            font-weight: 600;
            color: #495057;
            margin-bottom: 8px;
            font-size: 16px;
        }

        .coord-value {
            color: #2c3e50;
            font-family: 'Courier New', monospace;
            font-size: 14px;
            font-weight: 600;
        }

        .properties-display {
            background: #e8f5e8;
            border-radius: 10px;
            padding: 20px;
            margin-top: 15px;
        }

        .property-item {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 10px;
            font-size: 15px;
        }

        .property-label {
            color: #2e7d32;
            font-weight: 500;
        }

        .property-value {
            background: #4caf50;
            color: white;
            padding: 4px 10px;
            border-radius: 6px;
            font-weight: 600;
            font-family: 'Courier New', monospace;
        }

        .control-point {
            cursor: grab;
            transition: all 0.2s ease;
        }

        .control-point:hover {
            transform: scale(1.3);
        }

        .control-point:active {
            cursor: grabbing;
            transform: scale(1.5);
        }

        .rotation-center {
            cursor: grab;
            transition: all 0.2s ease;
        }

        .rotation-center:hover {
            transform: scale(1.2);
        }

        .rotation-center:active {
            cursor: grabbing;
            transform: scale(1.4);
        }

        .footer {
            background: linear-gradient(to right);
            color: #0c0302;
            text-align: center;
            padding: 10px;
            margin-top: 15px;
            border-radius: 0 0 10px 10px;
        }

        @media (max-width: 1200px) {
            .main-container {
                flex-direction: column;
                padding: 20px;
                gap: 20px;
            }
            
            .control-panel {
                width: 100%;
                padding: 25px;
            }
            
            .transform-buttons {
                grid-template-columns: 1fr 1fr;
                gap: 10px;
            }
            
            #geometryCanvas {
                height: 500px;
            }
        }

        @media (max-width: 768px) {
            .header h1 {
                font-size: 26px;
            }
            
            .header p {
                font-size: 16px;
            }
            
            .main-container {
                padding: 15px;
                gap: 15px;
            }
            
            .canvas-container {
                padding: 20px;
            }
            
            #geometryCanvas {
                height: 450px;
            }
            
            .control-panel {
                padding: 20px;
            }
            
            .control-group {
                padding: 20px;
                margin-bottom: 20px;
            }
            
            .transform-buttons {
                grid-template-columns: 1fr;
                gap: 8px;
            }
            
            .coordinate-display {
                grid-template-columns: 1fr;
                gap: 10px;
            }
            
            .action-buttons {
                flex-direction: column;
                gap: 10px;
            }
        }