/* 全局样式 */
    * {
        margin: 0;
        padding: 0;
        box-sizing: border-box;
    }

    body {
        font-family: 'Roboto', sans-serif;
        background: linear-gradient(135deg, #004AAD, #FFA500);
        color: #333;
        display: flex;
        min-height: 100vh;
        overflow-x: hidden;
    }

    /* 导航栏样式 */
    nav {
        position: fixed;
        top: 0;
        left: 0;
        width: 220px;
        height: 100vh;
        background-color: rgba(0, 63, 135, 0.9);
        color: #fff;
        padding: 30px 20px;
        display: flex;
        flex-direction: column;
        justify-content: space-between;
        transition: width 0.3s ease;
    }

    nav h1 {
        font-size: 24px;
        margin-bottom: 40px;
        text-align: center;
    }

    nav ul {
        list-style: none;
    }

    nav ul li {
        margin: 20px 0;
    }

    nav ul li a {
        color: #fff;
        text-decoration: none;
        font-size: 18px;
        transition: color 0.3s ease, padding-left 0.3s ease;
    }

    nav ul li a:hover {
        color: #FFA500;
        padding-left: 10px;
    }

    /* 主内容样式 */
    .main-content {
        margin-left: 220px;
        padding: 40px;
        background: rgba(255, 255, 255, 0.8);
        flex: 1;
        overflow-y: auto;
    }

    .prompt {
        font-size: 18px;
        color: #FF4500;
        margin-bottom: 20px;
        text-align: center;
    }

    article {
        max-width: 800px;
        margin: 0 auto;
    }

    article h2 {
        font-size: 32px;
        color: #004AAD;
        margin-bottom: 20px;
    }

    article h3 {
        font-size: 24px;
        color: #FFA500;
        margin: 30px 0 15px;
    }

    article h4 {
        font-size: 20px;
        color: #FF8C00;
        margin: 25px 0 10px;
    }

    article p {
        font-size: 16px;
        line-height: 1.6;
        margin-bottom: 15px;
    }

    article ul {
        list-style: disc inside;
        margin-bottom: 15px;
    }

    pre {
        background: #f4f4f4;
        padding: 15px;
        border-radius: 5px;
        overflow-x: auto;
        font-family: 'Courier New', Courier, monospace;
        margin-bottom: 20px;
    }

    code {
        font-family: 'Courier New', Courier, monospace;
        background: #eaeaea;
        padding: 2px 4px;
        border-radius: 3px;
    }

    /* 图片样式 */
    .images {
        display: flex;
        flex-wrap: wrap;
        gap: 15px;
        margin: 30px 0;
    }

    .images img {
        width: 150px;
        height: 150px;
        object-fit: cover;
        border-radius: 10px;
    }

    /* 响应式设计 */
    @media (max-width: 1440px) {
        nav {
            width: 200px;
        }

        .main-content {
            margin-left: 200px;
            padding: 35px;
        }
    }

    @media (max-width: 1200px) {
        nav {
            width: 180px;
        }

        .main-content {
            margin-left: 180px;
            padding: 30px;
        }

        article h2 {
            font-size: 28px;
        }

        article h3 {
            font-size: 22px;
        }
    }

    @media (max-width: 1024px) {
        nav {
            width: 160px;
        }

        .main-content {
            margin-left: 160px;
            padding: 25px;
        }

        article h2 {
            font-size: 26px;
        }

        article h3 {
            font-size: 20px;
        }
    }

    @media (max-width: 768px) {
        nav {
            position: static;
            width: 100%;
            height: auto;
            flex-direction: row;
            justify-content: space-between;
            padding: 20px;
        }

        nav ul {
            display: flex;
            gap: 15px;
        }

        .main-content {
            margin-left: 0;
            padding: 20px;
            background: none;
        }

        .images {
            justify-content: center;
        }
    }

    @media (max-width: 480px) {
        nav h1 {
            font-size: 20px;
        }

        nav ul li a {
            font-size: 16px;
        }

        article h2 {
            font-size: 24px;
        }

        article h3 {
            font-size: 18px;
        }

        article p, article li {
            font-size: 14px;
        }

        .images img {
            width: 100px;
            height: 100px;
        }
    }

    @media (max-width: 320px) {
        nav ul li a {
            font-size: 14px;
        }

        article h2 {
            font-size: 20px;
        }

        article h3 {
            font-size: 16px;
        }

        article p, article li {
            font-size: 12px;
        }

        .images img {
            width: 80px;
            height: 80px;
        }
    }

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

    .animated-background {
        background: radial-gradient(circle, rgb(255, 87, 34), transparent);
        animation: aurora-move 15s linear infinite;
    }

    /* 代码块样式 */
    .code-preview {
        background: #2d2d2d;
        color: #f8f8f2;
        padding: 20px;
        border-radius: 8px;
        font-family: 'Courier New', Courier, monospace;
        overflow-x: auto;
    }

    /* 卡片样式 */
    .card {
        background: rgba(255, 255, 255, 0.6);
        border-radius: 10px;
        box-shadow: 0 4px 8px rgba(0,0,0,0.1);
        padding: 20px;
        margin-bottom: 20px;
    }