/* 通用样式 */
    body {
        margin: 0;
        padding: 0;
        font-family: 'Roboto', sans-serif;
        background: linear-gradient(135deg, #1e3c72, #2a5298);
        color: #333;
        line-height: 1.6;
    }

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

    /* 头部样式 */
    header {
        background: linear-gradient(135deg, #1e3c72, #2a5298);
        color: #fff;
        padding: 40px 0;
        text-align: center;
        position: relative;
    }

    header h1 {
        margin: 0;
        font-size: 2.5em;
        font-weight: bold;
    }

    header p {
        margin-top: 10px;
        font-size: 1.2em;
        opacity: 0.8;
    }

    /* 导航栏样式 */
    nav {
        margin-top: 20px;
    }

    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: 1em;
        transition: color 0.3s;
    }

    nav ul li a:hover {
        color: #ffa500;
    }

    /* 主要内容样式 */
    main {
        background: rgba(255, 255, 255, 0.9);
        padding: 30px;
        margin-top: -50px;
        border-radius: 10px;
        box-shadow: 0 4px 15px rgba(0,0,0,0.2);
    }

    article h2 {
        color: #1e3c72;
        font-size: 2em;
        margin-bottom: 20px;
    }

    article h3 {
        color: #2a5298;
        font-size: 1.5em;
        margin-top: 30px;
        margin-bottom: 15px;
    }

    article p {
        margin-bottom: 20px;
        text-align: justify;
    }

    article pre {
        background: #f4f4f4;
        padding: 15px;
        border-radius: 5px;
        overflow-x: auto;
        margin-bottom: 20px;
    }

    article code {
        background: #eaeaea;
        padding: 2px 4px;
        border-radius: 3px;
    }

    /* 图片样式 */
    .images {
        display: flex;
        flex-wrap: wrap;
        gap: 10px;
        justify-content: center;
        margin-bottom: 20px;
    }

    .images img {
        width: 100%;
        max-width: 320px;
        border-radius: 5px;
    }

    /* 警示信息样式 */
    .reference {
        background: #fffae6;
        border-left: 6px solid #ffeb3b;
        padding: 10px 20px;
        margin: 20px 0;
        border-radius: 3px;
    }

    /* 响应式设计 */
    @media (max-width: 1440px) {
        article h2 {
            font-size: 2em;
        }
        article h3 {
            font-size: 1.5em;
        }
    }

    @media (max-width: 1200px) {
        .container {
            width: 95%;
        }
    }

    @media (max-width: 1024px) {
        nav ul {
            flex-direction: column;
            align-items: center;
        }
        nav ul li {
            margin: 10px 0;
        }
    }

    @media (max-width: 768px) {
        header h1 {
            font-size: 2em;
        }
        header p {
            font-size: 1em;
        }
        article h2 {
            font-size: 1.8em;
        }
        article h3 {
            font-size: 1.3em;
        }
    }

    @media (max-width: 480px) {
        header h1 {
            font-size: 1.5em;
        }
        nav ul li {
            margin: 5px 0;
        }
        .images {
            flex-direction: column;
        }
    }

    @media (max-width: 320px) {
        header h1 {
            font-size: 1.2em;
        }
        article h2 {
            font-size: 1.5em;
        }
        article h3 {
            font-size: 1.1em;
        }
    }