body {
            font-family: monospace;
            background-color: #000;
            color: #fff;
            text-align: center;
            margin: 0;
            padding: 20px;
            line-height: 1;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
        }
        h1 {
            color: #0f0;
            margin-bottom: 20px;
        }
        .controls {
            margin: 20px 0;
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 15px;
        }
        button, input[type="range"], input[type="color"] {
            padding: 8px 15px;
            background: #333;
            color: #fff;
            border: 1px solid #0f0;
            border-radius: 4px;
            cursor: pointer;
        }
        button:hover {
            background: #0f0;
            color: #000;
        }
        h2.sub-title {
            color: #808080; /* 灰色 */
            font-style: italic;
            font-size: 0.8em;
            text-align: center;
            margin-top: -0.5em;
            font-weight: normal;
        }
        #videoInput {
            display: none;
        }
        .video-container {
            margin: 20px 0;
            display: flex;
            justify-content: center;
        }
        #originalVideo {
            max-width: 100%;
            display: none;
        }
        #asciiCanvas {
            white-space: pre;
            font-size: 8px;
            letter-spacing: 0;
            overflow: auto;
            max-width: 100%;
            background: #000;
            border: 1px solid #0f0;
            padding: 10px;
            margin: 0 auto;
        }
        .slider-container {
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .checkbox-container {
            display: flex;
            align-items: center;
            gap: 5px;
        }