#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);
        }

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

        body {
            background-color: #0a0e17;
            color: #e2e8f0;
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            height: 100vh;
            overflow: hidden;
            display: flex;
        }

        /* 左侧展示区域 */
        .display-container {
            flex: 1;
            position: relative;
            height: 100%;
            background: radial-gradient(circle at center, #111827 0%, #030712 100%);
            border-right: 1px solid rgba(0, 242, 254, 0.15);
        }

        canvas {
            width: 100%;
            height: 100%;
            display: block;
        }

        /* 科技感网格背景线 */
        .grid-overlay {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-image:
                linear-gradient(rgba(0, 242, 254, 0.03) 1px, transparent 1px),
                linear-gradient(90deg, rgba(0, 242, 254, 0.03) 1px, transparent 1px);
            background-size: 40px 40px;
            pointer-events: none;
        }

        /* 右侧控制与教学面板 */
        .control-panel {
            width: 420px;
            height: 100%;
            background: rgba(15, 23, 42, 0.95);
            backdrop-filter: blur(10px);
            padding: 40px 30px;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
            box-shadow: -10px 0 30px rgba(0, 0, 0, 0.5);
            z-index: 10;
            overflow-y: auto;
        }

        .header {
            border-bottom: 2px solid rgba(0, 242, 254, 0.2);
            padding-bottom: 20px;
            margin-bottom: 25px;
        }

        .header h1 {
            font-size: 24px;
            font-weight: 700;
            color: #00f2fe;
            text-shadow: 0 0 15px rgba(0, 242, 254, 0.6);
            letter-spacing: 2px;
            margin-bottom: 5px;
        }

        .header p {
            font-size: 13px;
            color: #94a3b8;
            text-transform: uppercase;
            letter-spacing: 1px;
        }

        .content {
            flex: 1;
        }

        .concept-box {
            background: rgba(30, 41, 59, 0.5);
            border: 1px solid rgba(255, 255, 255, 0.05);
            border-left: 4px solid #00f2fe;
            padding: 20px;
            border-radius: 4px;
            margin-bottom: 25px;
        }

        .concept-box h3 {
            color: #38bdf8;
            margin-bottom: 10px;
            font-size: 16px;
        }

        .concept-box p {
            font-size: 14px;
            line-height: 1.6;
            color: #cbd5e1;
        }

        .instruction-box h4 {
            color: #94a3b8;
            font-size: 14px;
            margin-bottom: 10px;
        }

        .instruction-box ul {
            list-style-type: none;
        }

        .instruction-box li {
            font-size: 13px;
            line-height: 1.6;
            color: #94a3b8;
            margin-bottom: 8px;
            position: relative;
            padding-left: 15px;
        }

        .instruction-box li::before {
            content: "•";
            color: #00f2fe;
            position: absolute;
            left: 0;
            font-weight: bold;
        }

        /* 科技感按钮设计 */
        .btn-container {
            margin-top: 30px;
        }

        .toggle-btn {
            width: 100%;
            background: transparent;
            border: 1px solid #00f2fe;
            color: #00f2fe;
            padding: 16px 20px;
            font-size: 16px;
            font-weight: 600;
            letter-spacing: 2px;
            cursor: pointer;
            border-radius: 4px;
            position: relative;
            overflow: hidden;
            transition: all 0.3s ease;
            box-shadow: 0 0 10px rgba(0, 242, 254, 0.1);
        }

        .toggle-btn::before {
            content: '';
            position: absolute;
            top: 0;
            left: -100%;
            width: 100%;
            height: 100%;
            background: linear-gradient(90deg, transparent, rgba(0, 242, 254, 0.2), transparent);
            transition: all 0.6s ease;
        }

        .toggle-btn:hover::before {
            left: 100%;
        }

        .toggle-btn:hover {
            background: rgba(0, 242, 254, 0.1);
            box-shadow: 0 0 20px rgba(0, 242, 254, 0.4);
            text-shadow: 0 0 5px #00f2fe;
        }

        .toggle-btn:active {
            transform: scale(0.98);
        }

        /* 当前状态指示器 */
        .status-indicator {
            display: flex;
            align-items: center;
            margin-top: 20px;
            font-size: 14px;
            color: #94a3b8;
        }

        .status-dot {
            width: 8px;
            height: 8px;
            background-color: #ef4444;
            border-radius: 50%;
            margin-right: 10px;
            box-shadow: 0 0 8px #ef4444;
            transition: all 0.3s;
        }

        .status-dot.active {
            background-color: #22c55e;
            box-shadow: 0 0 8px #22c55e;
        }

        .status-text {
            font-weight: 600;
            color: #f1f5f9;
        }

        .footer {
            margin-top: 40px;
            font-size: 11px;
            color: #475569;
            text-align: center;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            padding-top: 15px;
        }