#menuBtn{
        position: fixed;
        top: 20px;
        left: 20px;
        z-index: 20;
        width: auto;
        padding: 12px 18px;
        border: none;
        border-radius: 14px;
        background: rgba(20,40,80,0.85);
        color: #d8ecff;
        font-size: 15px;
        cursor: pointer;
        backdrop-filter: blur(10px);
        border: 1px solid rgba(120,180,255,0.25);
        box-shadow:
            0 0 18px rgba(0,140,255,0.25);
        transition: 0.25s;
    }
    #menuBtn:hover{
        transform: translateY(-2px);
        background: rgba(40,80,140,0.95);
        box-shadow:
            0 0 24px rgba(80,180,255,0.45);
    }


        :root {
            --bg-color: #0b0f19;
            --panel-bg: rgba(18, 25, 41, 0.75);
            --border-color: rgba(0, 240, 255, 0.2);
            --accent-cyan: #00f0ff;
            --accent-blue: #0077ff;
            --accent-red: #ff3366;
            --text-main: #e0f7fc;
            --text-dim: #8ab4f8;
        }

        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
            user-select: none;
        }

        body {
            background-color: var(--bg-color);
            color: var(--text-main);
            font-family: 'Segoe UI', -apple-system, BlinkMacSystemFont, Roboto, sans-serif;
            min-height: 100vh;
            display: flex;
            overflow: auto;
        }

        /* 主响应式容器 */
        .container {
            display: flex;
            flex-direction: row;
            width: 100vw;
            height: 100vh;
            padding: 20px;
            gap: 20px;
            background: radial-gradient(circle at 50% 50%, #101a2e 0%, #080b12 100%);
        }

        /* 左侧展示区域 */
        .display-area {
            flex: 1;
            height: 100%;
            min-width: 300px;
            min-height: 300px;
            background: var(--panel-bg);
            border: 1px solid var(--border-color);
            border-radius: 16px;
            box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.5), inset 0 0 15px rgba(0, 240, 255, 0.05);
            backdrop-filter: blur(12px);
            display: flex;
            justify-content: center;
            align-items: center;
            position: relative;
            overflow: hidden;
        }

        canvas {
            display: block;
            border-radius: 8px;
            cursor: crosshair;
        }

        /* 右侧控制面板 */
        .control-panel {
            width: 360px;
            height: 100%;
            background: var(--panel-bg);
            border: 1px solid var(--border-color);
            border-radius: 16px;
            padding: 24px;
            display: flex;
            flex-direction: column;
            gap: 20px;
            box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.5), inset 0 0 15px rgba(0, 240, 255, 0.05);
            backdrop-filter: blur(12px);
            overflow-y: auto;
        }

        /* 标题样式 */
        .panel-header {
            border-bottom: 2px solid var(--border-color);
            padding-bottom: 12px;
        }

        .panel-title {
            font-size: 20px;
            font-weight: 700;
            color: var(--accent-cyan);
            letter-spacing: 1.5px;
            text-shadow: 0 0 10px rgba(0, 240, 255, 0.5);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .panel-subtitle {
            font-size: 12px;
            color: var(--text-dim);
            margin-top: 4px;
        }

        /* 控制组 */
        .control-group {
            display: flex;
            flex-direction: column;
            gap: 8px;
            background: rgba(0, 0, 0, 0.2);
            padding: 12px;
            border-radius: 8px;
            border: 1px solid rgba(255, 255, 255, 0.05);
        }

        .control-label {
            display: flex;
            justify-content: space-between;
            font-size: 14px;
            color: var(--text-main);
        }

        .control-value {
            color: var(--accent-cyan);
            font-family: monospace;
            font-weight: bold;
        }

        /* 滑块样式 */
        input[type=range] {
            -webkit-appearance: none;
            width: 100%;
            background: transparent;
        }

        input[type=range]:focus {
            outline: none;
        }

        input[type=range]::-webkit-slider-runnable-track {
            width: 100%;
            height: 6px;
            cursor: pointer;
            background: #1a2638;
            border-radius: 3px;
            border: 1px solid rgba(0, 240, 255, 0.3);
        }

        input[type=range]::-webkit-slider-thumb {
            height: 16px;
            width: 16px;
            border-radius: 50%;
            background: var(--accent-cyan);
            cursor: pointer;
            -webkit-appearance: none;
            margin-top: -5px;
            box-shadow: 0 0 10px var(--accent-cyan);
            transition: transform 0.1s ease;
        }

        input[type=range]::-webkit-slider-thumb:hover {
            transform: scale(1.2);
        }

        /* 按钮样式 */
        .btn-group {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 12px;
        }

        .btn {
            background: linear-gradient(135deg, rgba(0, 240, 255, 0.1), rgba(0, 119, 255, 0.2));
            border: 1px solid var(--accent-cyan);
            color: var(--accent-cyan);
            padding: 12px 16px;
            border-radius: 8px;
            font-size: 14px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            box-shadow: 0 0 10px rgba(0, 240, 255, 0.1);
            display: flex;
            justify-content: center;
            align-items: center;
            gap: 6px;
        }

        .btn:hover {
            background: linear-gradient(135deg, rgba(0, 240, 255, 0.3), rgba(0, 119, 255, 0.4));
            box-shadow: 0 0 15px rgba(0, 240, 255, 0.4);
            transform: translateY(-1px);
        }

        .btn:active {
            transform: translateY(1px);
        }

        .btn-reset {
            border-color: rgba(255, 255, 255, 0.3);
            color: var(--text-main);
            background: rgba(255, 255, 255, 0.05);
        }

        .btn-reset:hover {
            background: rgba(255, 255, 255, 0.15);
            box-shadow: 0 0 10px rgba(255, 255, 255, 0.2);
        }

        /* 开关切换样式 */
        .toggle-group {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 4px 0;
        }

        .switch {
            position: relative;
            display: inline-block;
            width: 44px;
            height: 22px;
        }

        .switch input {
            opacity: 0;
            width: 0;
            height: 0;
        }

        .slider {
            position: absolute;
            cursor: pointer;
            top: 0; left: 0; right: 0; bottom: 0;
            background-color: #1a2638;
            transition: .3s;
            border-radius: 22px;
            border: 1px solid var(--border-color);
        }

        .slider:before {
            position: absolute;
            content: "";
            height: 14px;
            width: 14px;
            left: 3px;
            bottom: 3px;
            background-color: var(--text-dim);
            transition: .3s;
            border-radius: 50%;
        }

        input:checked + .slider {
            background-color: rgba(0, 240, 255, 0.2);
            border-color: var(--accent-cyan);
        }

        input:checked + .slider:before {
            transform: translateX(22px);
            background-color: var(--accent-cyan);
            box-shadow: 0 0 8px var(--accent-cyan);
        }

        /* 图例说明 */
        .legend-box {
            margin-top: auto;
            background: rgba(0, 0, 0, 0.3);
            border-radius: 8px;
            padding: 12px;
            border: 1px solid rgba(255, 255, 255, 0.05);
            font-size: 12px;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .legend-item {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .legend-color {
            width: 12px;
            height: 12px;
            border-radius: 2px;
        }

        /* 响应式排版（窗口较小时上下分行，自动添加滚动条） */
        @media (max-width: 850px) {
            body {
                overflow-y: auto;
            }
            .container {
                flex-direction: column;
                height: auto;
                min-height: 100vh;
                overflow: visible;
            }

            .display-area {
                width: 100%;
                height: 60vh;
                min-height: 350px;
            }

            .control-panel {
                width: 100%;
                height: auto;
                overflow-y: visible;
            }
        }