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

    body {
        font-family: 'Microsoft YaHei', Arial, sans-serif;
        background-color: #f5f7fa;
        color: #333;
        line-height: 1.6;
    }

    .container {
        max-width: 1200px;
        margin: 0 auto;
        padding: 20px;
    }

    h1 {
        text-align: center;
        margin-bottom: 40px;
        color: #2c3e50;
        font-size: 28px;
    }

    .question-grid {
        column-width: 300px;
        column-gap: 20px;
    }

    .question-card {
        background-color: #fff;
        border-radius: 8px;
        box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
        padding: 20px;
        transition: transform 0.3s ease, box-shadow 0.3s ease;
        break-inside: avoid;
        margin-bottom: 20px;
    }

    .question-card:hover {
        transform: translateY(-5px);
        box-shadow: 0 5px 20px rgba(0, 0, 0, 0.15);
    }

    .card-header {
        margin-bottom: 15px;
        border-bottom: 2px solid #3498db;
        padding-bottom: 10px;
    }

    .card-header h2 {
        color: #3498db;
        font-size: 18px;
        font-weight: 600;
    }

    .question-list {
        list-style: none;
    }

    .question-item {
        margin-bottom: 10px;
        padding-left: 20px;
        position: relative;
    }

    .question-item::before {
        content: counter(question-counter) ".";
        counter-increment: question-counter;
        position: absolute;
        left: 0;
        color: #3498db;
        font-weight: bold;
    }

    .question-list {
        counter-reset: question-counter;
    }

    .question-item a {
        color: #333;
        text-decoration: none;
        transition: color 0.3s ease;
    }

    .question-item a:hover {
        color: #3498db;
    }

    .card-footer {
        margin-top: 15px;
        text-align: right;
        padding-top: 10px;
        border-top: 1px solid #eee;
    }

    .more-link {
        color: #3498db;
        text-decoration: none;
        font-size: 14px;
        font-weight: 500;
    }

    .more-link:hover {
        text-decoration: underline;
    }

    @media (max-width: 768px) {
        .question-grid {
            column-width: 100%;
        }

        .container {
            padding: 10px;
        }

        h1 {
            font-size: 24px;
        }
    }

    @media (min-width: 769px) and (max-width: 1024px) {
        .question-grid {
            column-width: 300px;
        }
    }