/* 基础样式 */
    body {
        margin: 0;
        padding: 0;
        background: linear-gradient(135deg, #001f3f, #0074d9);
        font-family: 'Roboto', sans-serif;
        color: #ffffff;
        line-height: 1.6;
    }

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

    /* 头部样式 */
    header {
        text-align: center;
        padding: 50px 0 30px 0;
        background: rgba(0, 0, 0, 0.5);
        border-bottom: 2px solid #39ff14;
    }

    header h1 {
        font-size: 3em;
        margin: 0;
        color: #39ff14;
        text-transform: uppercase;
        letter-spacing: 2px;
    }

    /* 导航栏样式 */
    nav {
        margin-top: 20px;
    }

    nav ul {
        list-style: none;
        padding: 0;
        display: flex;
        justify-content: center;
        flex-wrap: wrap;
    }

    nav ul li {
        margin: 0 15px;
    }

    nav ul li a {
        text-decoration: none;
        color: #ffffff;
        font-size: 1.1em;
        transition: color 0.3s ease;
    }

    nav ul li a:hover {
        color: #39ff14;
    }

    /* 主内容样式 */
    main {
        display: flex;
        flex-direction: column;
        gap: 40px;
        padding: 40px 0;
    }

    /* 示范文章样式 */
    .article-section {
        background: rgba(0, 0, 0, 0.7);
        padding: 30px;
        border-radius: 10px;
        box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
    }

    .article-section h2 {
        color: #39ff14;
        font-size: 2em;
        margin-bottom: 20px;
        border-bottom: 2px solid #39ff14;
        padding-bottom: 10px;
    }

    .article-section h3 {
        color: #ffffff;
        font-size: 1.5em;
        margin-top: 30px;
    }

    .article-section h4 {
        color: #39ff14;
        font-size: 1.2em;
        margin-top: 20px;
    }

    .article-section p {
        color: #cccccc;
        margin: 15px 0;
    }

    .article-section b {
        color: #39ff14;
    }

    .article-section pre {
        background: #002b5c;
        padding: 15px;
        border-radius: 5px;
        overflow-x: auto;
    }

    .article-section code {
        color: #39ff14;
        font-family: 'Courier New', Courier, monospace;
    }

    .article-section table {
        width: 100%;
        border-collapse: collapse;
        margin: 20px 0;
    }

    .article-section table, 
    .article-section th, 
    .article-section td {
        border: 1px solid #39ff14;
    }

    .article-section th, 
    .article-section td {
        padding: 10px;
        text-align: left;
    }

    .article-section th {
        background: #39ff14;
        color: #000000;
    }

    /* 示例数据展示样式 */
    .cards-section {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
        gap: 20px;
    }

    .card {
        background: rgba(0, 0, 0, 0.8);
        border-radius: 10px;
        padding: 20px;
        box-shadow: 0 4px 10px rgba(0, 0, 0, 0.5);
        transition: transform 0.3s ease, box-shadow 0.3s ease;
        display: flex;
        flex-direction: column;
        align-items: center;
        text-align: center;
    }

    .card:hover {
        transform: scale(1.05);
        box-shadow: 0 8px 20px rgba(0, 0, 0, 0.7);
    }

    .card img {
        width: 80px;
        height: 80px;
        margin-bottom: 15px;
    }

    .card h3 {
        color: #39ff14;
        margin-bottom: 10px;
        font-size: 1.5em;
    }

    .card p {
        color: #cccccc;
        flex-grow: 1;
    }

    .card .buttons {
        margin-top: 15px;
    }

    .card .buttons a {
        text-decoration: none;
        background: #39ff14;
        color: #000000;
        padding: 10px 15px;
        border-radius: 5px;
        margin: 5px;
        transition: background 0.3s ease;
        font-size: 0.9em;
    }

    .card .buttons a:hover {
        background: #228b22;
    }

    /* 提示信息样式 */
    .hint {
        text-align: center;
        font-size: 1.2em;
        color: #ffffff;
        margin: 20px 0;
        padding: 10px;
        background: rgba(0, 0, 0, 0.6);
        border-radius: 5px;
    }

    /* 底部样式 */
    footer {
        text-align: center;
        padding: 20px 0;
        background: rgba(0, 0, 0, 0.5);
        color: #cccccc;
        font-size: 1em;
    }

    /* 响应式设计 */
    @media (max-width: 1440px) {
        header h1 {
            font-size: 2.5em;
        }
    }

    @media (max-width: 1200px) {
        .container {
            width: 95%;
        }
    }

    @media (max-width: 1024px) {
        nav ul {
            flex-direction: column;
        }

        nav ul li {
            margin: 10px 0;
        }

        .article-section {
            padding: 20px;
        }
    }

    @media (max-width: 768px) {
        header {
            padding: 30px 0 20px 0;
        }

        header h1 {
            font-size: 2em;
        }

        .article-section h2 {
            font-size: 1.8em;
        }

        .card img {
            width: 60px;
            height: 60px;
        }

        .card h3 {
            font-size: 1.2em;
        }

        .card .buttons a {
            padding: 8px 12px;
            font-size: 0.8em;
        }
    }

    @media (max-width: 480px) {
        .article-section h2 {
            font-size: 1.5em;
        }

        nav ul li {
            margin: 8px 0;
        }

        .card img {
            width: 50px;
            height: 50px;
        }

        .card h3 {
            font-size: 1em;
        }

        .card .buttons a {
            padding: 6px 10px;
            font-size: 0.7em;
        }
    }

    @media (max-width: 320px) {
        header h1 {
            font-size: 1.5em;
        }

        .article-section h2 {
            font-size: 1.2em;
        }

        .card {
            padding: 15px;
        }

        .card h3 {
            font-size: 0.9em;
        }

        .card .buttons a {
            padding: 5px 8px;
            font-size: 0.6em;
        }
    }

    /* 动画效果 */
    .fade-in {
        animation: fadeIn 2s ease-in-out;
    }

    @keyframes fadeIn {
        from { opacity: 0; }
        to { opacity: 1; }
    }

    /* 代码块样式 */
    pre code {
        display: block;
        padding: 15px;
        background: #002b5c;
        border-radius: 5px;
        overflow-x: auto;
        color: #39ff14;
        font-family: 'Courier New', Courier, monospace;
    }

    /* 表格样式 */
    table {
        width: 100%;
        border-collapse: collapse;
        margin: 20px 0;
    }

    table, th, td {
        border: 1px solid #39ff14;
    }

    th, td {
        padding: 10px;
        text-align: left;
    }

    th {
        background-color: #39ff14;
        color: #000000;
    }

    /* 按钮样式 */
    .button {
        background-color: #39ff14;
        color: #000000;
        padding: 10px 20px;
        border: none;
        border-radius: 5px;
        cursor: pointer;
        transition: background-color 0.3s ease;
        text-decoration: none;
        font-size: 1em;
    }

    .button:hover {
        background-color: #228b22;
    }