/* 定义CSS变量 */
    :root {
        --primary-color: #1E88E5;
        --secondary-color: #333333;
        --accent-color: #4CAF50;
        --background-color: #FFFFFF;
        --font-primary: 'Roboto', sans-serif;
        --font-secondary: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    }

    /* 全局样式 */
    body {
        margin: 0;
        padding: 0;
        font-family: var(--font-primary);
        background: radial-gradient(circle, var(--primary-color), transparent);
        color: var(--secondary-color);
        line-height: 1.6;
    }

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

    /* 头部样式 */
    header {
        background-color: var(--primary-color);
        color: #fff;
        padding: 20px 0;
        text-align: center;
        position: relative;
    }

    header h1 {
        margin: 0;
        font-size: 2.5rem;
        font-family: 'Roboto', sans-serif;
    }

    /* 导航栏 */
    nav {
        margin-top: 10px;
    }

    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 {
        color: #fff;
        text-decoration: none;
        font-size: 1rem;
        transition: color 0.3s ease;
    }

    nav ul li a:hover {
        color: var(--accent-color);
    }

    /* 主内容 */
    main {
        padding: 40px 0;
        background: linear-gradient(135deg, #f5f7fa, #c3cfe2);
    }

    main h2 {
        text-align: center;
        color: var(--primary-color);
        margin-bottom: 20px;
    }

    /* 文章展示 */
    .article-demo {
        background-color: #fff;
        padding: 20px;
        border-radius: 8px;
        box-shadow: 0 4px 6px rgba(0,0,0,0.1);
        margin-bottom: 40px;
    }

    .article-demo h2 {
        color: var(--secondary-color);
        font-size: 1.8rem;
        margin-bottom: 15px;
    }

    .article-demo p, .article-demo ul, .article-demo table {
        margin-bottom: 15px;
    }

    .article-demo ul {
        list-style: disc inside;
    }

    .article-demo pre {
        background-color: #f0f0f0;
        padding: 15px;
        border-radius: 5px;
        overflow-x: auto;
    }

    .article-demo code {
        font-family: 'Courier New', Courier, monospace;
        color: var(--primary-color);
    }

    /* 数据展示 */
    .data-section {
        display: flex;
        flex-wrap: wrap;
        gap: 20px;
        justify-content: center;
    }

    .data-card {
        background-color: #fff;
        border: 1px solid #ddd;
        border-radius: 8px;
        padding: 20px;
        width: 300px;
        box-shadow: 0 2px 4px rgba(0,0,0,0.1);
        transition: transform 0.3s ease;
    }

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

    .data-card h3 {
        color: var(--primary-color);
        margin-bottom: 10px;
    }

    .data-card p {
        margin: 0;
    }

    /* 图片展示 */
    .image-gallery {
        display: flex;
        flex-wrap: wrap;
        gap: 10px;
        justify-content: center;
        margin-bottom: 40px;
    }

    .image-gallery img {
        width: 100px;
        height: 100px;
        object-fit: cover;
        border-radius: 5px;
    }

    /* 提示信息 */
    .notice {
        text-align: center;
        font-size: 1.2rem;
        color: var(--accent-color);
        margin: 20px 0;
    }

    /* 页脚 */
    footer {
        background-color: var(--secondary-color);
        color: #fff;
        text-align: center;
        padding: 20px 0;
    }

    /* 按钮样式 */
    .button {
        display: inline-block;
        padding: 10px 20px;
        background-color: var(--primary-color);
        color: #fff;
        text-decoration: none;
        border-radius: 5px;
        transition: background-color 0.3s ease;
    }

    .button:hover {
        background-color: var(--accent-color);
    }

    /* 响应式设计 */
    @media (max-width: 1440px) {
        header h1 {
            font-size: 2.2rem;
        }
    }

    @media (max-width: 1200px) {
        .data-section {
            flex-direction: row;
        }
    }

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

        nav ul li {
            margin: 10px 0;
        }

        .data-card {
            width: 45%;
        }
    }

    @media (max-width: 768px) {
        header h1 {
            font-size: 2rem;
        }

        .data-card {
            width: 100%;
        }

        .article-demo {
            padding: 15px;
        }
    }

    @media (max-width: 480px) {
        nav ul li a {
            font-size: 0.9rem;
        }

        main h2 {
            font-size: 1.5rem;
        }

        .data-card h3 {
            font-size: 1.2rem;
        }

        .notice {
            font-size: 1rem;
        }
    }

    @media (max-width: 320px) {
        header h1 {
            font-size: 1.8rem;
        }

        nav ul li a {
            font-size: 0.8rem;
        }

        .button {
            padding: 8px 16px;
            font-size: 0.9rem;
        }
    }

    /* 代码块样式 */
    pre {
        background: #2d2d2d;
        color: #ccc;
        padding: 15px;
        border-radius: 5px;
        overflow-x: auto;
        font-family: 'Courier New', Courier, monospace;
    }

    /* 动画效果 */
    @keyframes aurora-move {
        0% { background-position: 0% 50%; }
        50% { background-position: 100% 50%; }
        100% { background-position: 0% 50%; }
    }

    .animated-background {
        animation: aurora-move 15s linear infinite;
    }