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

    body {
        font-family: 'Roboto', sans-serif;
        background: linear-gradient(135deg, #0A192F 0%, #64FFDA 50%, #F78C6C 100%);
        color: #ffffff;
        line-height: 1.6;
        padding: 20px;
    }

    a {
        color: #64FFDA;
        text-decoration: none;
        transition: color 0.3s ease;
    }

    a:hover {
        color: #F78C6C;
    }

    /* 头部样式 */
    header {
        text-align: center;
        padding: 50px 0;
        position: relative;
    }

    header h1 {
        font-size: 48px;
        text-shadow: 2px 2px 10px rgba(255, 255, 255, 0.5);
        margin-bottom: 20px;
    }

    header p {
        font-size: 18px;
        max-width: 800px;
        margin: 0 auto;
    }

    /* 导航栏 */
    nav {
        background: rgba(10, 25, 47, 0.8);
        padding: 15px 0;
        position: sticky;
        top: 0;
        z-index: 1000;
        backdrop-filter: blur(10px);
    }

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

    nav ul li {
        margin: 0 15px;
    }

    nav ul li a {
        font-size: 16px;
        padding: 5px 10px;
        transition: background 0.3s ease, color 0.3s ease;
    }

    nav ul li a:hover {
        background: rgba(100, 255, 218, 0.2);
        border-radius: 5px;
    }

    /* 主内容区 */
    main {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
        gap: 20px;
        padding: 40px 0;
    }

    .card {
        background: rgba(255, 255, 255, 0.2);
        padding: 20px;
        border-radius: 15px;
        box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
        transition: transform 0.3s ease, background 0.3s ease;
    }

    .card:hover {
        transform: scale(1.05);
        background: rgba(255, 255, 255, 0.3);
    }

    .card img {
        width: 100%;
        height: auto;
        border-radius: 10px;
        margin-bottom: 15px;
    }

    .card h3 {
        margin-bottom: 10px;
        font-size: 24px;
        text-shadow: 1px 1px 5px rgba(0, 0, 0, 0.5);
    }

    .card p {
        font-size: 16px;
    }

    /* 示例数据展示 */
    .example-section {
        background: rgba(10, 25, 47, 0.8);
        padding: 40px;
        border-radius: 15px;
        margin: 40px 0;
    }

    .example-section h2 {
        text-align: center;
        margin-bottom: 20px;
        font-size: 32px;
        text-shadow: 2px 2px 10px rgba(255, 255, 255, 0.5);
    }

    .example-section article {
        max-width: 800px;
        margin: 0 auto;
        background: rgba(255, 255, 255, 0.1);
        padding: 20px;
        border-radius: 10px;
        box-shadow: 0 4px 10px rgba(0, 0, 0, 0.5);
    }

    .example-section h3 {
        font-size: 24px;
        margin-top: 20px;
        text-shadow: 1px 1px 5px rgba(255, 255, 255, 0.3);
    }

    .example-section p {
        margin-top: 10px;
        font-size: 16px;
    }

    .example-section pre {
        background: #1a1a1a;
        padding: 15px;
        border-radius: 8px;
        overflow: auto;
        margin-top: 10px;
    }

    .example-section code {
        color: #64FFDA;
        font-family: 'Courier New', Courier, monospace;
    }

    /* 底部提示 */
    footer {
        text-align: center;
        padding: 20px 0;
        font-size: 14px;
        color: #cccccc;
    }

    /* 响应式设计 */
    @media (max-width: 480px) {
        header h1 {
            font-size: 32px;
        }

        nav ul {
            flex-direction: column;
        }

        nav ul li {
            margin: 10px 0;
        }

        main {
            grid-template-columns: 1fr;
        }
    }

    @media (min-width: 481px) and (max-width: 768px) {
        header h1 {
            font-size: 40px;
        }

        main {
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
        }
    }

    @media (min-width: 769px) and (max-width: 1024px) {
        header h1 {
            font-size: 44px;
        }

        main {
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
        }
    }

    @media (min-width: 1025px) and (max-width: 1440px) {
        header h1 {
            font-size: 48px;
        }

        main {
            grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
        }
    }

    @media (min-width: 1441px) {
        header h1 {
            font-size: 56px;
        }

        main {
            grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
        }
    }