/* 全局样式 */
    body {
        margin: 0;
        padding: 0;
        font-family: 'Roboto', sans-serif;
        line-height: 1.6;
        color: #ffffff;
        background: linear-gradient(135deg, #004AAD, #7A00FF);
        background-size: 400% 400%;
        animation: gradient-background 15s ease infinite;
    }

    @keyframes gradient-background {
        0% { background-position: 0% 50%; }
        50% { background-position: 100% 50%; }
        100% { background-position: 0% 50%; }
    }

    header {
        background: rgba(0, 0, 0, 0.5);
        padding: 20px;
        text-align: center;
        position: relative;
        z-index: 1;
    }

    header h1 {
        font-size: 2.5em;
        margin: 0;
        font-weight: bold;
        text-transform: uppercase;
        letter-spacing: 2px;
    }

    nav {
        margin-top: 15px;
    }

    nav a {
        color: #ffffff;
        text-decoration: none;
        margin: 0 15px;
        font-size: 1em;
        transition: color 0.3s;
    }

    nav a:hover {
        color: #9BE6B3;
    }

    .cta-button {
        background: #9BE6B3;
        color: #004AAD;
        border: none;
        padding: 15px 30px;
        font-size: 1.2em;
        border-radius: 25px;
        cursor: pointer;
        transition: transform 0.3s, background 0.3s;
        margin-top: 20px;
    }

    .cta-button:hover {
        transform: scale(1.1);
        background: #7A00FF;
        color: #ffffff;
    }

    .container {
        padding: 50px 20px;
        display: flex;
        flex-wrap: wrap;
        justify-content: space-around;
        background: rgba(0, 0, 0, 0.3);
    }

    .card {
        background: linear-gradient(135deg, #004AAD, #7A00FF);
        width: 30%;
        margin: 20px 0;
        padding: 20px;
        border-radius: 15px;
        box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
        transition: transform 0.3s, background 0.3s;
        position: relative;
    }

    .card:hover {
        transform: scale(1.05);
        background: linear-gradient(135deg, #7A00FF, #004AAD);
    }

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

    .card h3 {
        margin-top: 0;
        font-size: 1.5em;
        color: #9BE6B3;
    }

    .card p {
        font-size: 1em;
        color: #ffffff;
    }

    .code-block {
        background: rgba(255, 255, 255, 0.1);
        padding: 15px;
        border-radius: 10px;
        overflow-x: auto;
        font-family: 'Courier New', Courier, monospace;
        margin: 20px 0;
    }

    /* 示例展示样式 */
    .example-section {
        background: rgba(0, 0, 0, 0.7);
        padding: 40px 20px;
    }

    .example-section h2 {
        text-align: center;
        font-size: 2em;
        margin-bottom: 20px;
        color: #9BE6B3;
    }

    .example-content {
        max-width: 800px;
        margin: 0 auto;
        background: rgba(255, 255, 255, 0.1);
        padding: 20px;
        border-radius: 10px;
    }

    .example-content h2, .example-content h3, .example-content h4 {
        color: #9BE6B3;
    }

    .example-content pre {
        background: #2D2D2D;
        color: #00FF00;
        padding: 10px;
        border-radius: 5px;
        overflow-x: auto;
    }

    .gallery {
        display: flex;
        flex-wrap: wrap;
        justify-content: center;
        padding: 40px 20px;
        background: rgba(0, 0, 0, 0.5);
    }

    .gallery img {
        width: 150px;
        height: 150px;
        object-fit: cover;
        margin: 10px;
        border-radius: 10px;
        transition: transform 0.3s;
    }

    .gallery img:hover {
        transform: scale(1.1);
    }

    footer {
        background: rgba(0, 0, 0, 0.8);
        color: #ffffff;
        text-align: center;
        padding: 20px;
    }

    footer p {
        margin: 0;
        font-size: 0.9em;
    }

    /* 响应式设计 */
    @media (max-width: 1440px) {
        .card {
            width: 28%;
        }
    }

    @media (max-width: 1200px) {
        .card {
            width: 45%;
        }
    }

    @media (max-width: 1024px) {
        .card {
            width: 45%;
        }
    }

    @media (max-width: 768px) {
        .card {
            width: 100%;
        }

        nav {
            display: flex;
            flex-direction: column;
            align-items: center;
        }

        nav a {
            margin: 10px 0;
        }

        .gallery img {
            width: 120px;
            height: 120px;
        }
    }

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

        .cta-button {
            padding: 10px 20px;
            font-size: 1em;
        }

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

    @media (max-width: 320px) {
        header h1 {
            font-size: 1.5em;
        }

        .cta-button {
            padding: 8px 16px;
            font-size: 0.9em;
        }

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