/* 重置默认样式 */
    * {
        margin: 0;
        padding: 0;
        box-sizing: border-box;
    }

    /* 字体引入 */
    @import url('https://fonts.googleapis.com/css2?family=Montserrat:wght@300;400;700&display=swap');

    /* 根元素变量 */
    :root {
        --primary-color: #1E90FF; /* 科技蓝 */
        --secondary-color: #A9A9A9; /* 金属灰 */
        --highlight-color: linear-gradient(to right, #FFD700, #FF6347); /* 霓虹渐变 */
        --background-gradient: radial-gradient(circle, rgba(30, 144, 255, 0.3), transparent);
        --font-family: 'Montserrat', sans-serif;
    }

    /* 全局样式 */
    body {
        font-family: var(--font-family);
        line-height: 1.6;
        color: #333;
        background: #f5f5f5;
    }

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

    /* 头部样式 */
    header {
        background: var(--primary-color);
        color: white;
        padding: 60px 20px;
        text-align: center;
        position: relative;
        overflow: hidden;
    }

    header::after {
        content: "";
        position: absolute;
        top: 0;
        left: 50%;
        width: 200%;
        height: 100%;
        background: var(--background-gradient);
        transform: translateX(-50%);
        animation: aurora-move 15s linear infinite;
        z-index: 0;
    }

    header h1 {
        position: relative;
        z-index: 1;
        font-size: 2.5em;
        margin-bottom: 10px;
    }

    header p {
        position: relative;
        z-index: 1;
        font-size: 1.2em;
    }

    /* 导航栏 */
    nav {
        background: var(--secondary-color);
        padding: 10px 0;
    }

    nav ul {
        list-style: none;
        display: flex;
        justify-content: center;
        flex-wrap: wrap;
    }

    nav ul li {
        margin: 0 15px;
    }

    nav ul li a {
        color: white;
        text-decoration: none;
        font-weight: 500;
        transition: color 0.3s ease;
    }

    nav ul li a:hover {
        color: var(--primary-color);
    }

    /* 主内容区 */
    main {
        padding: 40px 20px;
    }

    section {
        margin-bottom: 60px;
    }

    section h2 {
        font-size: 2em;
        margin-bottom: 20px;
        color: var(--primary-color);
        position: relative;
        padding-bottom: 10px;
    }

    section h2::after {
        content: "";
        width: 50px;
        height: 4px;
        background: var(--highlight-color);
        display: block;
        margin-top: 10px;
    }

    section p {
        margin-bottom: 20px;
        font-weight: 400;
    }

    /* 代码块样式 */
    pre {
        background: #2d2d2d;
        color: #ccc;
        padding: 15px;
        border-radius: 5px;
        overflow: auto;
        font-size: 0.9em;
        margin-bottom: 20px;
    }

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

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

    table th, table td {
        border: 1px solid #ddd;
        padding: 12px;
        text-align: left;
    }

    table th {
        background: var(--primary-color);
        color: white;
    }

    /* 示例数据卡片 */
    .cards {
        display: flex;
        flex-wrap: wrap;
        gap: 20px;
    }

    .card {
        background: white;
        border: 1px solid #ddd;
        border-radius: 8px;
        padding: 20px;
        flex: 1 1 calc(33.333% - 40px);
        box-shadow: 0 4px 6px rgba(0,0,0,0.1);
        transition: transform 0.3s ease, box-shadow 0.3s ease;
    }

    .card:hover {
        transform: translateY(-10px);
        box-shadow: 0 10px 15px rgba(0,0,0,0.2);
    }

    .card h3 {
        margin-bottom: 15px;
        color: var(--secondary-color);
    }

    .card p {
        font-weight: 300;
    }

    /* 图片样式 */
    .images {
        display: flex;
        flex-wrap: wrap;
        gap: 10px;
        justify-content: center;
        margin-bottom: 40px;
    }

    .images img {
        width: 160px;
        height: 160px;
        object-fit: cover;
        border-radius: 10px;
        transition: transform 0.3s ease;
    }

    .images img:hover {
        transform: scale(1.05);
    }

    /* 响应式设计 */
    @media (max-width: 1440px) {
        .card {
            flex: 1 1 calc(33.333% - 40px);
        }
    }

    @media (max-width: 1200px) {
        .card {
            flex: 1 1 calc(50% - 40px);
        }
    }

    @media (max-width: 768px) {
        nav ul {
            flex-direction: column;
        }

        .card {
            flex: 1 1 100%;
        }
    }

    @media (max-width: 480px) {
        header h1 {
            font-size: 2em;
        }

        section h2 {
            font-size: 1.5em;
        }

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

    @media (max-width: 320px) {
        nav ul li {
            margin: 10px 0;
        }
    }

    /* 动画关键帧 */
    @keyframes aurora-move {
        0% { transform: translateX(-50%) rotate(0deg); }
        100% { transform: translateX(-50%) rotate(360deg); }
    }

    @keyframes fadeIn {
        from { opacity: 0; }
        to { opacity: 1; }
    }

    .fade-in {
        animation: fadeIn 2s ease-in-out;
    }

    /* 底部样式 */
    footer {
        background: var(--secondary-color);
        color: white;
        text-align: center;
        padding: 20px;
    }

    footer p {
        font-size: 0.9em;
    }