/* 引入字体 */
    @import url('https://fonts.googleapis.com/css2?family=Poppins:wght@700&family=Open+Sans&display=swap');

    body {
        margin: 0;
        font-family: 'Open Sans', sans-serif;
        background-color: #F5F5DC;
        color: #333;
        line-height: 1.6;
    }

    header {
        background: linear-gradient(135deg, #2E7D32, #B2FF59);
        color: white;
        padding: 20px;
        text-align: center;
        font-family: 'Poppins', sans-serif;
    }

    .container {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
        gap: 20px;
        padding: 20px;
    }

    .module {
        background: #fff;
        border-radius: 8px;
        box-shadow: 0 4px 6px rgba(0,0,0,0.1);
        overflow: hidden;
        transition: transform 0.3s;
    }

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

    .module-header {
        padding: 15px;
        font-family: 'Poppins', sans-serif;
        font-size: 1.5em;
        color: #fff;
    }

    .sustainable {
        background: linear-gradient(135deg, #2E7D32, #8D6E63);
    }

    .innovation {
        background: linear-gradient(135deg, #4A148C, #0288D1);
    }

    .security {
        background: linear-gradient(135deg, #000000, #03A9F4);
    }

    .module-content {
        padding: 20px;
    }

    .module-content img {
        width: 100%;
        height: auto;
        border-radius: 4px;
    }

    .module-content h3 {
        margin-top: 0;
        color: #2E7D32;
    }

    .article-section {
        padding: 20px;
        background: #fafafa;
        border-top: 2px solid #ddd;
    }

    .article-section h2 {
        font-family: 'Poppins', sans-serif;
        color: #4A148C;
    }

    .article-section pre {
        background: #272822;
        color: #f8f8f2;
        padding: 15px;
        border-radius: 5px;
        overflow-x: auto;
        font-size: 0.9em;
    }

    .article-section code {
        color: #66D9EF;
    }

    footer {
        background: #616161;
        color: #fff;
        text-align: center;
        padding: 10px;
        position: fixed;
        width: 100%;
        bottom: 0;
    }

    button {
        background-color: #03A9F4;
        color: white;
        border: none;
        padding: 10px 20px;
        cursor: pointer;
        transition: all 0.3s ease;
        border-radius: 4px;
    }

    button:hover {
        transform: scale(1.1);
        box-shadow: 0 8px 16px rgba(0,0,0,0.2);
    }

    @media (max-width: 768px) {
        .container {
            grid-template-columns: 1fr;
        }
    }

    @media (max-width: 480px) {
        header {
            font-size: 1.2em;
        }
    }