/* 颜色变量定义 */
    :root {
        --forest-green: #4CAF50;
        --light-sky-blue: #B3E5FC;
        --deep-purple: #6A1B9A;
        --carbon-black: #212121;
        --white: #FFFFFF;
        --gray-light: #F5F5F5;
    }

    /* 全局样式 */
    body {
        margin: 0;
        padding: 0;
        font-family: 'Open Sans', sans-serif;
        background: linear-gradient(135deg, var(--forest-green), var(--light-sky-blue));
        color: var(--carbon-black);
        line-height: 1.6;
        letter-spacing: 0.5px;
    }

    /* 头部样式 */
    header {
        background: linear-gradient(135deg, var(--deep-purple), var(--forest-green));
        color: var(--white);
        padding: 40px 20px;
        text-align: center;
        position: relative;
        overflow: hidden;
    }

    header h1 {
        font-family: 'Poppins', sans-serif;
        font-size: 2.5rem;
        margin: 0;
        animation: fadeIn 2s ease forwards;
    }

    header::after {
        content: '';
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: radial-gradient(circle, var(--light-sky-blue) 0%, transparent 70%);
        opacity: 0.3;
        animation: aurora-move 15s linear infinite;
    }

    /* 主内容区域 */
    main {
        padding: 20px;
        max-width: 1200px;
        margin: 0 auto;
    }

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

    .article h2, .article h3, .article h4 {
        font-family: 'Poppins', sans-serif;
        color: var(--deep-purple);
    }

    .article pre {
        background: #f0f0f0;
        padding: 10px;
        border-radius: 4px;
        overflow-x: auto;
    }

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

    /* 数据展示 */
    .data-section {
        background: var(--gray-light);
        padding: 20px;
        border-radius: 8px;
        box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    }

    .data-section h3 {
        font-family: 'Poppins', sans-serif;
        color: var(--deep-purple);
    }

    .data-section ul {
        list-style: none;
        padding: 0;
    }

    .data-section li {
        background: var(--white);
        margin: 10px 0;
        padding: 15px;
        border-left: 5px solid var(--forest-green);
        border-radius: 4px;
        box-shadow: 0 2px 4px rgba(0,0,0,0.05);
        transition: transform 0.3s ease;
    }

    .data-section li:hover {
        transform: translateX(10px);
    }

    /* 图片展示 */
    .image-gallery {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
        gap: 10px;
        margin-bottom: 40px;
    }

    .image-gallery img {
        width: 100%;
        border-radius: 8px;
        object-fit: cover;
    }

    /* 卡片布局 */
    .cards {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
        gap: 20px;
        margin-bottom: 40px;
    }

    .card {
        background: var(--white);
        border-radius: 8px;
        box-shadow: 0 4px 6px rgba(0,0,0,0.1);
        padding: 20px;
        transition: transform 0.3s ease, box-shadow 0.3s ease;
    }

    .card:hover {
        transform: scale(1.05);
        box-shadow: 0 6px 10px rgba(0,0,0,0.15);
    }

    .card h4 {
        font-family: 'Poppins', sans-serif;
        color: var(--deep-purple);
        margin-bottom: 10px;
    }

    .card p {
        color: var(--carbon-black);
    }

    /* 按钮样式 */
    .btn {
        display: inline-block;
        background-color: var(--forest-green);
        color: var(--white);
        padding: 10px 20px;
        border: none;
        border-radius: 4px;
        cursor: pointer;
        text-decoration: none;
        transition: background-color 0.3s ease;
        font-family: 'Poppins', sans-serif;
    }

    .btn:hover {
        background-color: #388E3C;
    }

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

    table th, table td {
        border: 1px solid #ddd;
        padding: 8px;
        text-align: left;
    }

    table th {
        background-color: var(--forest-green);
        color: var(--white);
    }

    /* 代码块样式 */
    .code-example {
        background: #f5f5f5;
        padding: 15px;
        border-radius: 6px;
        overflow-x: auto;
        margin-bottom: 20px;
    }

    /* 跨屏响应 */
    @media (max-width: 320px) {
        header h1 {
            font-size: 1.5rem;
        }

        .cards {
            grid-template-columns: 1fr;
        }
    }

    @media (max-width: 480px) {
        .article, .data-section, .card {
            padding: 15px;
        }

        .image-gallery {
            grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
        }
    }

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

        .image-gallery {
            grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
        }
    }

    @media (max-width: 1024px) {
        .cards {
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
        }

        .image-gallery {
            grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
        }
    }

    @media (max-width: 1200px) {
        main {
            padding: 30px;
        }
    }

    @media (min-width: 1440px) {
        header h1 {
            font-size: 3rem;
        }

        .cards {
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
        }

        .image-gallery {
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
        }
    }

    /* 动画关键帧 */
    @keyframes fadeIn {
        from { opacity: 0; }
        to { opacity: 1; }
    }

    @keyframes aurora-move {
        0% { transform: translateY(0); }
        50% { transform: translateY(-20px); }
        100% { transform: translateY(0); }
    }