/* =========================================
           HertzInno Brand Style Configuration (CSS Variables)
           Front-end developers: Insert official brand colors and fonts here.
           ========================================= */
        :root {
            --hz-primary: #0f4c81;        /* Primary Brand Color (Tech Blue default) */
            --hz-primary-hover: #0b3d68;  /* Button/Hover Color */
            --hz-bg-page: #f4f6f8;        /* Page Background Color */
            --hz-bg-panel: #ffffff;       /* Module Panel Background Color */
            --hz-text-title: #1a1a1a;     /* Title Text Color */
            --hz-text-body: #4a4a4a;      /* Body Text Color */
            --hz-border: #e2e8f0;         /* Border Color */
            --hz-radius: 4px;             /* Border Radius (0-4px typical for industrial B2B) */
            --hz-font: "Helvetica Neue", Helvetica, Arial, sans-serif; /* Primary Font */
            
            /* Chart and Animation Specific Colors */
            --hz-chart-stokes: #64748b;   /* Stokes Curve Color */
            --hz-chart-anti: #ef4444;     /* Anti-Stokes Curve Color */
            --hz-laser: #10b981;          /* Laser Pulse Color */
        }

        /* Basic Reset and Typography */
        body {
            font-family: var(--hz-font);
            color: var(--hz-text-body);
            background-color: var(--hz-bg-page);
            margin: 0;
            padding: 40px 20px;
        }
        .hz-container {
            max-width: 1440px;
            margin: 0 auto;
            background: var(--hz-bg-panel);
            padding: 100px;
            border-radius: var(--hz-radius);
            border: 1px solid var(--hz-border);
            box-shadow: 0 2px 10px rgba(0,0,0,0.05);
        }
        .hz-title {
            color: var(--hz-text-title);
            margin-top: 0;
            margin-bottom: 24px;
            font-size: 22px;
            font-weight: 600;
            border-bottom: 2px solid var(--hz-primary);
            padding-bottom: 10px;
            display: inline-block;
        }

        /* Control Panel */
        .hz-controls {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
            margin-bottom: 30px;
            background: var(--hz-bg-page);
            padding: 20px;
            border: 1px solid var(--hz-border);
            border-radius: var(--hz-radius);
        }
        .hz-control-group {
            display: flex;
            flex-direction: column;
        }
        .hz-label {
            font-size: 14px;
            font-weight: bold;
            color: var(--hz-text-title);
            margin-bottom: 10px;
        }
        .hz-value {
            color: var(--hz-primary);
            font-family: monospace;
            font-size: 16px;
        }
        input[type="range"] {
            width: 100%;
            cursor: pointer;
        }
        .hz-btn {
            grid-column: span 2;
            padding: 12px;
            background-color: var(--hz-primary);
            color: #fff;
            border: none;
            border-radius: var(--hz-radius);
            font-size: 16px;
            font-weight: bold;
            cursor: pointer;
            transition: background-color 0.2s;
        }
        .hz-btn:hover {
            background-color: var(--hz-primary-hover);
        }
        .hz-btn:disabled {
            background-color: var(--hz-border);
            cursor: not-allowed;
        }

        /* Visual Animation Area */
        .hz-visual-area {
            position: relative;
            height: 100px;
            background: #1a1a1a;
            border-radius: var(--hz-radius);
            margin-bottom: 30px;
            overflow: hidden;
            border: 1px solid var(--hz-border);
        }
        .hz-fiber {
            position: absolute;
            top: 50%;
            left: 5%;
            width: 90%;
            height: 2px;
            background: #4a4a4a;
            transform: translateY(-50%);
        }
        .hz-hotspot {
            position: absolute;
            top: 0;
            bottom: 0;
            background: rgba(239, 68, 68, 0.5);
            filter: blur(8px);
            pointer-events: none;
            transition: left 0.3s linear, opacity 0.3s linear;
        }
        .hz-laser {
            position: absolute;
            top: 50%;
            left: 5%;
            width: 8px;
            height: 8px;
            background: var(--hz-laser);
            border-radius: 50%;
            box-shadow: 0 0 8px var(--hz-laser);
            transform: translateY(-50%);
            display: none;
        }
        .hz-scale-label {
            position: absolute;
            bottom: 6px;
            color: #a0aec0;
            font-size: 12px;
            font-family: monospace;
        }

        /* Chart Area */
        .hz-chart-wrapper {
            position: relative;
            height: 320px;
            width: 100%;
            margin-bottom: 20px;
        }

        /* Bottom Note */
        .hz-note {
            font-size: 13px;
            color: var(--hz-text-body);
            background: var(--hz-bg-page);
            padding: 15px;
            border-left: 4px solid var(--hz-primary);
            border-radius: 0 var(--hz-radius) var(--hz-radius) 0;
        }
        .hz-note p { margin: 0 0 8px 0; }
        .hz-note p:last-child { margin: 0; }