style.css

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    padding: 20px;
}

.container {
    max-width: 900px;
    margin: 0 auto;
    background: white;
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    overflow: hidden;
}

header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 30px;
    text-align: center;
}

header h1 {
    font-size: 2.2em;
    margin-bottom: 10px;
}

header p {
    font-size: 1.1em;
    opacity: 0.9;
}

.settings-panel {
    padding: 30px;
    background: #f8f9fa;
    border-bottom: 2px solid #e9ecef;
}

.settings-panel h2 {
    margin-bottom: 20px;
    color: #495057;
    font-size: 1.4em;
}

.setting-group {
    margin-bottom: 20px;
}

.setting-group label {
    display: block;
    font-weight: 600;
    margin-bottom: 8px;
    color: #495057;
}

.setting-group select,
.setting-group input[type="number"] {
    width: 100%;
    padding: 12px;
    border: 2px solid #dee2e6;
    border-radius: 8px;
    font-size: 1em;
    transition: border-color 0.3s;
}

.setting-group select:focus,
.setting-group input[type="number"]:focus {
    outline: none;
    border-color: #667eea;
}

.checkbox-group {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
}

.checkbox-group label {
    display: flex;
    align-items: center;
    gap: 5px;
    cursor: pointer;
    font-weight: normal;
}

.checkbox-group input[type="checkbox"] {
    width: 20px;
    height: 20px;
    cursor: pointer;
}

.buttons {
    display: flex;
    gap: 15px;
    margin-top: 25px;
}

.btn-primary,
.btn-secondary {
    padding: 15px 30px;
    border: none;
    border-radius: 8px;
    font-size: 1.1em;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    flex: 1;
}

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.6);
}

.btn-secondary {
    background: #6c757d;
    color: white;
    box-shadow: 0 4px 15px rgba(108, 117, 125, 0.4);
}

.btn-secondary:hover {
    background: #5a6268;
    transform: translateY(-2px);
}

.btn-success {
    background: linear-gradient(135deg, #28a745 0%, #20c997 100%);
    color: white;
    box-shadow: 0 4px 15px rgba(40, 167, 69, 0.4);
}

.btn-success:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(40, 167, 69, 0.6);
}

.questions-panel {
    padding: 30px;
}

.questions-panel h2 {
    margin-bottom: 20px;
    color: #495057;
    font-size: 1.4em;
}

#questionsContainer {
    background: #f8f9fa;
    border-radius: 10px;
    padding: 20px;
    min-height: 200px;
}

.placeholder {
    text-align: center;
    color: #6c757d;
    padding: 60px 20px;
    font-size: 1.1em;
}

.question-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 15px;
    background: white;
    border-radius: 8px;
    margin-bottom: 10px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    transition: transform 0.2s;
}

.question-item:hover {
    transform: translateX(5px);
}

.question-text {
    font-size: 1.2em;
    font-weight: 600;
    color: #495057;
    flex: 1;
}

    .answer-text {
        font-size: 1.2em;
        font-weight: 700;
        color: #667eea;
        margin-left: 20px;
    }

    .questions-grid {
        display: grid;
        grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
        gap: 15px;
    }

    .question-card {
        background: white;
        border-radius: 10px;
        padding: 15px;
        box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
        transition: transform 0.2s, box-shadow 0.2s;
    }

    .question-card:hover {
        transform: translateY(-3px);
        box-shadow: 0 5px 15px rgba(0, 0, 0, 0.15);
    }

    .question-number {
        font-size: 0.9em;
        color: #6c757d;
        margin-bottom: 5px;
    }

    @media (max-width: 768px) {
        .container {
            margin: 0;
            border-radius: 0;
        }

        header h1 {
            font-size: 1.8em;
        }

        .buttons {
            flex-direction: column;
        }

        .questions-grid {
            grid-template-columns: 1fr;
        }
    }

    .user-answer {
        width: 80px;
        padding: 8px;
        margin-top: 10px;
        border: 2px solid #dee2e6;
        border-radius: 6px;
        font-size: 1em;
        text-align: center;
        transition: border-color 0.3s;
    }

    .user-answer:focus {
        outline: none;
        border-color: #667eea;
    }

    .correct {
        border-color: #28a745 !important;
        background-color: #d4edda;
    }

    .incorrect {
        border-color: #dc3545 !important;
        background-color: #f8d7da;
    }

    .result-panel {
        padding: 30px;
        background: #f8f9fa;
        border-top: 2px solid #e9ecef;
    }

    .result-panel h2 {
        margin-bottom: 20px;
        color: #495057;
        font-size: 1.4em;
    }

    .score-summary {
        background: white;
        padding: 25px;
        border-radius: 10px;
        margin-bottom: 20px;
        box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    }

    .score-title {
        font-size: 1.3em;
        font-weight: 700;
        color: #495057;
        margin-bottom: 15px;
    }

    .score-details {
        display: flex;
        justify-content: space-around;
        flex-wrap: wrap;
        gap: 20px;
    }

    .score-item {
        text-align: center;
    }

    .score-value {
        font-size: 2em;
        font-weight: 700;
        color: #667eea;
        margin-bottom: 5px;
    }

    .score-value.perfect {
        color: #28a745;
    }

    .score-value.good {
        color: #28a745;
    }

    .score-value.pass {
        color: #ffc107;
    }

    .score-value.fail {
        color: #dc3545;
    }

    .score-label {
        font-size: 0.9em;
        color: #6c757d;
    }

    .detailed-results {
        background: white;
        padding: 25px;
        border-radius: 10px;
        box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    }

    .detailed-item {
        padding: 12px;
        border-bottom: 1px solid #e9ecef;
        display: flex;
        justify-content: space-between;
        align-items: center;
    }

    .detailed-item:last-child {
        border-bottom: none;
    }

    .detailed-item.correct {
        background-color: #d4edda;
    }

    .detailed-item.incorrect {
        background-color: #f8d7da;
    }

    .detailed-item.unanswered {
        background-color: #fff3cd;
    }

    .detailed-question {
        font-weight: 600;
        color: #495057;
    }

    .detailed-answers {
        display: flex;
        gap: 15px;
    }

    .user-answer-text {
        color: #6c757d;
    }

    .correct-answer-text {
        font-weight: 700;
        color: #28a745;
    }

    .result-badge {
        padding: 4px 12px;
        border-radius: 12px;
        font-size: 0.9em;
        font-weight: 600;
    }

    .result-badge.correct {
        background-color: #d4edda;
        color: #155724;
    }

    .result-badge.incorrect {
        background-color: #f8d7da;
        color: #721c24;
    }

    .result-badge.unanswered {
        background-color: #fff3cd;
        color: #856404;
    }

    @media print {
        body {
            background: white;
            padding: 0;
        }

        .container {
            box-shadow: none;
            border-radius: 0;
        }

        .settings-panel,
        header p {
            display: none;
        }

        header {
            padding: 20px;
            background: white;
            color: black;
        }

        header h1 {
            color: black;
        }

        .question-item {
            box-shadow: none;
            border: 1px solid #dee2e6;
        }
    }