body {
            font-family: 'PingFang SC', 'Microsoft YaHei', sans-serif;
            margin: 0;
            padding: 20px;
            background: #DCF5D9;
            color: #102620;
            min-height: 100vh;
        }

        .title {
            text-align: center;
            font-size: 42px;
            font-weight: bold;
            color: #004737;
            margin-bottom: 30px;
        }

        .main-container {
            max-width: 1400px;
            margin: 0 auto;
        }

        .clocks-container {
            display: flex;
            gap: 40px;
            justify-content: center;
            margin-bottom: 30px;
        }

        .clock-section {
            background: #F8F9F7;
            border-radius: 15px;
            padding: 25px;
            text-align: center;
            min-width: 450px;
        }

        .clock-title {
            font-size: 28px;
            font-weight: bold;
            color: #004737;
            margin-bottom: 20px;
        }

        .controls-container {
            display: flex;
            gap: 40px;
            justify-content: center;
            margin-top: 30px;
        }

        .control-panel {
            background: #F8F9F7;
            padding: 25px;
            border-radius: 15px;
            width: 320px;
        }

        .control-group {
            margin-bottom: 25px;
        }

        .control-group label {
            display: block;
            font-size: 18px;
            font-weight: bold;
            color: #004737;
            margin-bottom: 10px;
        }

        .time-input {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 15px;
        }

        .time-input input {
            width: 60px;
            padding: 8px;
            border: 2px solid #A7DB9A;
            border-radius: 8px;
            font-size: 18px;
            text-align: center;
            background: white;
        }

        .time-input span {
            font-size: 20px;
            font-weight: bold;
            color: #004737;
        }

        .slider-container {
            margin-bottom: 15px;
        }

        .slider {
            width: 100%;
            height: 8px;
            border-radius: 4px;
            background: #A7DB9A;
            outline: none;
            -webkit-appearance: none;
        }

        .slider::-webkit-slider-thumb {
            -webkit-appearance: none;
            appearance: none;
            width: 20px;
            height: 20px;
            border-radius: 50%;
            background: #FF6421;
            cursor: pointer;
        }

        .value-display {
            font-size: 16px;
            color: #636D6A;
            margin-top: 5px;
        }

        .reset-btn {
            width: 100%;
            padding: 12px;
            background: #FF6421;
            color: white;
            border: none;
            border-radius: 8px;
            font-size: 18px;
            font-weight: bold;
            cursor: pointer;
            margin-top: 15px;
        }

        .reset-btn:hover {
            background: #FF9364;
        }

        .question-panel {
            background: #F8F9F7;
            padding: 30px;
            border-radius: 15px;
            text-align: center;
            margin-top: 40px;
            max-width: 800px;
            margin-left: auto;
            margin-right: auto;
            border: 3px solid #FF6421;
        }

        .question-title {
            font-size: 32px;
            font-weight: bold;
            color: #004737;
            margin-bottom: 20px;
        }

        .question-content {
            font-size: 24px;
            color: #102620;
            line-height: 1.6;
            background: #FFDE5E;
            padding: 20px;
            border-radius: 10px;
            margin-bottom: 20px;
        }

        .answer-options {
            display: flex;
            justify-content: center;
            gap: 30px;
            margin-top: 20px;
        }

        .answer-btn {
            padding: 15px 30px;
            font-size: 20px;
            font-weight: bold;
            border: 3px solid #004737;
            border-radius: 10px;
            background: white;
            color: #004737;
            cursor: pointer;
            transition: all 0.3s ease;
        }

        .answer-btn:hover {
            background: #A7DB9A;
            transform: translateY(-2px);
        }

        .answer-btn.selected {
            background: #FF6421;
            color: white;
            border-color: #FF6421;
        }

        .result-display {
            margin-top: 20px;
            padding: 15px;
            border-radius: 10px;
            font-size: 20px;
            font-weight: bold;
            display: none;
        }

        .result-correct {
            background: #AACA9F;
            color: #004737;
        }

        .result-incorrect {
            background: #FFB3B3;
            color: #8B0000;
        }

        .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) {
            .clocks-container {
                flex-direction: column;
                align-items: center;
            }
            
            .controls-container {
                flex-direction: column;
                align-items: center;
            }

            .answer-options {
                flex-direction: column;
                align-items: center;
            }
        }

        @media (max-width: 768px) {
            .clock-section, .control-panel {
                min-width: auto;
                width: 100%;
            }
        }