/* 全局样式 */
    body {
        margin: 0;
        padding: 0;
        font-family: 'Roboto', sans-serif;
        background: linear-gradient(135deg, #121212, #1f1f1f);
        color: #f0f8ff;
        line-height: 1.6;
    }

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

    /* 导航栏 */
    .navbar {
        position: fixed;
        top: 0;
        width: 100%;
        background: rgba(18, 18, 18, 0.9);
        padding: 15px 0;
        z-index: 1000;
        box-shadow: 0 2px 4px rgba(0,0,0,0.5);
    }

    .navbar ul {
        list-style: none;
        display: flex;
        justify-content: center;
        margin: 0;
        padding: 0;
    }

    .navbar li {
        margin: 0 15px;
    }

    .navbar a {
        color: #f0f8ff;
        text-decoration: none;
        font-size: 16px;
        transition: color 0.3s ease;
    }

    .navbar a:hover {
        color: #4a90e2;
    }

    /* 主标题 */
    .main-title {
        text-align: center;
        margin: 100px 0 50px 0;
        font-size: 2.5em;
        color: #e74c3c;
        animation: fadeIn 2s ease-in-out;
    }

    /* 内容区 */
    .content {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 40px;
    }

    /* 文章部分 */
    .article {
        background: rgba(255, 255, 255, 0.1);
        padding: 20px;
        border-radius: 10px;
        box-shadow: 0 4px 6px rgba(0,0,0,0.3);
    }

    .article h2, .article h3 {
        color: #8e44ad;
    }

    .article pre {
        background: #2c3e50;
        padding: 15px;
        border-radius: 5px;
        overflow-x: auto;
        color: #ecf0f1;
        font-family: 'Courier New', Courier, monospace;
        margin: 10px 0;
    }

    /* 示例数据展示 */
    .example-data {
        background: rgba(255, 255, 255, 0.1);
        padding: 20px;
        border-radius: 10px;
        box-shadow: 0 4px 6px rgba(0,0,0,0.3);
    }

    .example-data h2 {
        color: #e67e22;
    }

    .example-data ul {
        list-style: disc inside;
    }

    .example-data li {
        margin: 10px 0;
    }

    /* 图片样式 */
    .image-grid {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
        gap: 10px;
        margin: 20px 0;
    }

    .image-grid img {
        width: 100%;
        height: auto;
        border-radius: 5px;
    }

    /* 提示 */
    .hint {
        text-align: center;
        margin: 40px 0;
        font-size: 1.2em;
        color: #f39c12;
    }

    /* 媒体查询 */
    @media (max-width: 1440px) {
        .content {
            grid-template-columns: 1fr 1fr;
        }
    }

    @media (max-width: 1200px) {
        .content {
            grid-template-columns: 1fr 1fr;
        }
    }

    @media (max-width: 1024px) {
        .content {
            grid-template-columns: 1fr 1fr;
        }
    }

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

        .navbar ul {
            flex-direction: column;
            align-items: center;
        }

        .navbar li {
            margin: 10px 0;
        }
    }

    @media (max-width: 480px) {
        .main-title {
            font-size: 2em;
        }

        .navbar a {
            font-size: 14px;
        }
    }

    @media (max-width: 320px) {
        .main-title {
            font-size: 1.8em;
        }

        .navbar a {
            font-size: 12px;
        }
    }

    /* 动画效果 */
    @keyframes fadeIn {
        from { opacity: 0; transform: translateY(-20px); }
        to { opacity: 1; transform: translateY(0); }
    }

    .fade-in {
        animation: fadeIn 1.5s ease-in-out;
    }

    /* 按钮样式 */
    .button {
        background: #4a90e2;
        color: #fff;
        padding: 10px 20px;
        border: none;
        border-radius: 5px;
        cursor: pointer;
        transition: transform 0.3s ease, background 0.3s ease;
    }

    .button:hover {
        transform: scale(1.05);
        background: #3498db;
    }

    /* 代码块样式 */
    .code-block {
        background: #2c3e50;
        padding: 15px;
        border-radius: 5px;
        overflow-x: auto;
        color: #ecf0f1;
        font-family: 'Courier New', Courier, monospace;
    }