/* 基础样式 */
    body {
        margin: 0;
        padding: 0;
        font-family: 'Roboto', sans-serif;
        background: linear-gradient(135deg, #1E274B, #4B0082);
        color: #FFFFFF;
    }

    /* 容器 */
    .container {
        width: 90%;
        max-width: 1200px;
        margin: 0 auto;
        padding: 20px;
    }

    /* 头部样式 */
    header {
        text-align: center;
        padding: 50px 0;
        background: rgba(255, 255, 255, 0.1);
        border-radius: 10px;
        margin-top: 20px;
    }

    header h1 {
        font-size: 2.5em;
        color: #FFD700;
        text-shadow: 2px 2px 8px rgba(0,0,0,0.5);
    }

    /* 主要内容 */
    main {
        display: flex;
        flex-wrap: wrap;
        gap: 20px;
        margin-top: 30px;
    }

    .card {
        background: rgba(255, 255, 255, 0.2);
        border-radius: 10px;
        padding: 20px;
        flex: 1 1 calc(33% - 40px);
        box-shadow: 0 4px 15px rgba(0,0,0,0.3);
        transition: transform 0.3s ease;
    }

    .card:hover {
        transform: scale(1.05);
    }

    .card img {
        width: 100%;
        height: auto;
        border-radius: 10px;
    }

    .card h3 {
        margin-top: 15px;
        font-family: 'Playfair Display', serif;
        color: #FFA500;
    }

    .card p {
        margin-top: 10px;
        line-height: 1.6;
    }

    /* 示例文章 */
    .example-article {
        width: 100%;
        background: rgba(255, 255, 255, 0.1);
        padding: 20px;
        border-radius: 10px;
        box-shadow: 0 4px 15px rgba(0,0,0,0.3);
        margin-top: 40px;
    }

    .example-article h2 {
        color: #8A2BE2;
        text-shadow: 1px 1px 5px rgba(0,0,0,0.5);
    }

    .example-article pre {
        background: #2F4F4F;
        padding: 15px;
        border-radius: 5px;
        overflow-x: auto;
    }

    .example-article code {
        color: #00FA9A;
        font-family: 'Courier New', Courier, monospace;
    }

    /* 提示文字 */
    .reference-note {
        text-align: center;
        font-size: 1.2em;
        color: #FFA500;
        margin-top: 30px;
    }

    /* 响应式设计 */
    @media (max-width: 1440px) {
        .card {
            flex: 1 1 calc(33% - 40px);
        }
    }

    @media (max-width: 1200px) {
        .card {
            flex: 1 1 calc(50% - 40px);
        }
    }

    @media (max-width: 768px) {
        main {
            flex-direction: column;
        }
        .card {
            flex: 1 1 100%;
        }
    }

    @media (max-width: 480px) {
        header h1 {
            font-size: 2em;
        }
        .reference-note {
            font-size: 1em;
        }
    }