/* 导入字体 */
    @import url('https://fonts.googleapis.com/css2?family=Poppins:wght@400;700&family=Roboto:wght@400;700&display=swap');

    /* 全局样式 */
    body {
        margin: 0;
        padding: 0;
        font-family: 'Poppins', sans-serif;
        background: linear-gradient(135deg, #1e3c72, #2a5298);
        color: #ffffff;
        overflow-x: hidden;
    }

    /* 渐变背景动画 */
    @keyframes gradientAnimation {
        0% { background-position: 0% 50%; }
        50% { background-position: 100% 50%; }
        100% { background-position: 0% 50%; }
    }

    .animated-gradient {
        background: linear-gradient(270deg, #1e3c72, #2a5298, #1e3c72);
        background-size: 600% 600%;
        animation: gradientAnimation 15s ease infinite;
    }

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

    /* 头部样式 */
    header {
        text-align: center;
        padding: 60px 20px;
        background: rgba(0, 0, 0, 0.5);
    }

    header h1 {
        font-family: 'Roboto', sans-serif;
        font-size: 48px;
        font-weight: bold;
        background: linear-gradient(90deg, #00c6ff, #0072ff);
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
    }

    /* 导航栏 */
    nav {
        position: fixed;
        top: 0;
        width: 100%;
        background: rgba(0, 0, 0, 0.7);
        padding: 10px 0;
        z-index: 1000;
    }

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

    nav ul li {
        margin: 0 15px;
    }

    nav ul li a {
        color: #ffffff;
        text-decoration: none;
        font-size: 16px;
        transition: color 0.3s;
    }

    nav ul li a:hover {
        color: #00c6ff;
    }

    /* 主内容 */
    main {
        padding: 120px 20px 60px 20px;
    }

    section {
        margin-bottom: 60px;
    }

    section h2 {
        font-family: 'Roboto', sans-serif;
        font-size: 36px;
        margin-bottom: 20px;
        color: #ff7e5f;
    }

    section p {
        font-size: 18px;
        line-height: 1.8;
        color: #f0f0f0;
    }

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

    .images-grid img {
        width: 100%;
        border-radius: 10px;
    }

    /* 按钮样式 */
    .btn {
        display: inline-block;
        padding: 10px 20px;
        background: rgba(255, 255, 255, 0.2);
        border: 2px solid #00c6ff;
        border-radius: 5px;
        color: #ffffff;
        text-decoration: none;
        font-size: 16px;
        transition: background 0.3s, transform 0.3s;
    }

    .btn:hover {
        background: rgba(255, 255, 255, 0.4);
        transform: scale(1.05);
    }

    /* 示例展示 */
    .sample-article {
        background: rgba(255, 255, 255, 0.1);
        padding: 20px;
        border-radius: 10px;
        overflow: hidden;
    }

    .sample-article h2 {
        font-size: 28px;
        color: #feb47b;
    }

    .sample-article pre {
        background: #2a2a2a;
        padding: 10px;
        border-radius: 5px;
        overflow-x: auto;
    }

    .sample-article code {
        color: #f1c40f;
        font-family: 'Roboto', monospace;
    }

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

    table, th, td {
        border: 1px solid #ffffff;
    }

    th, td {
        padding: 10px;
        text-align: left;
    }

    th {
        background: #0072ff;
    }

    /* 响应式设计 */
    @media (max-width: 768px) {
        header h1 {
            font-size: 32px;
        }

        nav ul {
            flex-direction: column;
        }

        nav ul li {
            margin: 10px 0;
        }
    }

    @media (max-width: 480px) {
        header h1 {
            font-size: 24px;
        }

        section h2 {
            font-size: 24px;
        }

        section p {
            font-size: 16px;
        }
    }