/* 基础样式设置 */
    * {
        margin: 0;
        padding: 0;
        box-sizing: border-box;
    }

    body {
        font-family: 'Merriweather', serif;
        background: linear-gradient(135deg, #0A2540, #6F42C1);
        color: #ffffff;
        line-height: 1.6;
    }

    h1, h2, h3, h4, h5, h6 {
        font-family: 'Poppins', sans-serif;
        color: #FFC107;
        margin-bottom: 20px;
    }

    p {
        margin-bottom: 20px;
        font-size: 1em;
    }

    a {
        color: #FFC107;
        text-decoration: none;
        rel: nofollow;
    }

    /* 导航栏样式 */
    nav {
        position: fixed;
        top: 0;
        width: 100%;
        background: rgba(10, 37, 64, 0.9);
        padding: 15px 30px;
        display: flex;
        justify-content: space-between;
        align-items: center;
        z-index: 1000;
        transition: background 0.3s ease;
    }

    nav a {
        margin-left: 20px;
        padding: 10px 15px;
        border-radius: 5px;
        transition: background 0.3s, transform 0.3s;
    }

    nav a:hover {
        background: rgba(255, 255, 255, 0.1);
        transform: scale(1.05);
    }

    /* 章节样式 */
    section {
        min-height: 100vh;
        padding: 100px 50px 50px 50px;
        display: flex;
        flex-direction: column;
        justify-content: center;
        align-items: center;
    }

    /* 按钮样式 */
    .btn {
        display: inline-block;
        padding: 10px 25px;
        background: #FFC107;
        color: #0A2540;
        border: none;
        border-radius: 25px;
        cursor: pointer;
        transition: box-shadow 0.3s, transform 0.3s;
        font-size: 1em;
    }

    .btn:hover {
        box-shadow: 0 8px 16px rgba(0, 0, 0, 0.2);
        transform: scale(1.05);
    }

    /* 卡片样式 */
    .card {
        background: rgba(255, 255, 255, 0.1);
        padding: 20px;
        border-radius: 15px;
        box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
        margin: 20px;
        max-width: 400px;
        text-align: center;
        transition: transform 0.3s, box-shadow 0.3s;
    }

    .card:hover {
        transform: translateY(-10px);
        box-shadow: 0 12px 20px rgba(0, 0, 0, 0.2);
    }

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

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

    /* 代码块样式 */
    pre {
        background: rgba(0, 0, 0, 0.7);
        padding: 15px;
        border-radius: 10px;
        overflow-x: auto;
        width: 100%;
        max-width: 800px;
        margin: 20px 0;
    }

    code {
        font-family: 'Courier New', Courier, monospace;
        color: #FFC107;
    }

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

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

    /* 响应式设计 */
    @media (max-width: 1440px) {
        section {
            padding: 80px 40px 40px 40px;
        }
    }

    @media (max-width: 1200px) {
        .images img {
            width: 120px;
            height: 120px;
        }
    }

    @media (max-width: 1024px) {
        nav {
            padding: 10px 20px;
        }

        section {
            padding: 70px 20px 20px 20px;
        }
    }

    @media (max-width: 768px) {
        .images {
            flex-direction: column;
            align-items: center;
        }

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

        .card {
            max-width: 100%;
        }
    }

    @media (max-width: 480px) {
        nav a {
            margin-left: 10px;
            padding: 8px 12px;
            font-size: 0.9em;
        }

        .btn {
            padding: 8px 20px;
            font-size: 0.9em;
        }
    }

    @media (max-width: 320px) {
        nav {
            flex-direction: column;
            align-items: flex-start;
        }

        section {
            padding: 60px 10px 10px 10px;
        }

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