/* 全局样式 */
    * {
        margin: 0;
        padding: 0;
        box-sizing: border-box;
    }

    body {
        font-family: 'Open Sans', sans-serif;
        background: linear-gradient(135deg, #0A2463, #00FFC7, #B91D73, #FF8F00);
        background-size: 400% 400%;
        animation: gradientAnimation 15s linear infinite;
        color: #E0E0E0;
        line-height: 1.6;
        padding: 20px;
    }

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

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

    header {
        text-align: center;
        padding: 50px 0;
        color: white;
    }

    header h1 {
        font-family: 'Roboto', sans-serif;
        font-size: 48px;
        margin-bottom: 10px;
    }

    header p {
        font-size: 18px;
    }

    nav {
        display: flex;
        justify-content: center;
        gap: 20px;
        margin: 20px 0;
    }

    nav a {
        text-decoration: none;
        color: #00FFC7;
        font-weight: bold;
        transition: color 0.3s ease;
    }

    nav a:hover {
        color: #B91D73;
    }

    .hero {
        position: relative;
        height: 400px;
        background: url('https://images.gptkong.com/demo/sample1.png') center center/cover no-repeat;
        border-radius: 15px;
        box-shadow: 0 8px 16px rgba(0, 0, 0, 0.3);
        display: flex;
        align-items: center;
        justify-content: center;
        color: white;
        text-align: center;
        margin-bottom: 40px;
    }

    .hero::after {
        content: '';
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: rgba(10, 36, 99, 0.5);
        border-radius: 15px;
    }

    .hero-content {
        position: relative;
        z-index: 1;
    }

    .hero h2 {
        font-size: 36px;
        margin-bottom: 10px;
    }

    .hero p {
        font-size: 18px;
        max-width: 600px;
    }

    .section {
        margin-bottom: 60px;
    }

    .section h2 {
        font-family: 'Roboto', sans-serif;
        font-size: 32px;
        color: #FFFFFF;
        margin-bottom: 20px;
        text-align: center;
    }

    .cards {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
        gap: 20px;
    }

    .card {
        background: rgba(255, 255, 255, 0.1);
        border-radius: 10px;
        padding: 20px;
        box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
        transition: transform 0.3s ease, background 0.3s ease;
    }

    .card:hover {
        transform: translateY(-10px);
        background: rgba(255, 255, 255, 0.2);
    }

    .card img {
        width: 100%;
        border-radius: 8px;
        margin-bottom: 15px;
    }

    .card h3 {
        font-size: 24px;
        margin-bottom: 10px;
        color: #00FFC7;
    }

    .card p {
        font-size: 16px;
        color: #E0E0E0;
    }

    .code-block {
        background: rgba(0, 0, 0, 0.7);
        padding: 20px;
        border-radius: 10px;
        overflow-x: auto;
        margin: 20px 0;
    }

    .code-block code {
        font-family: 'Courier New', Courier, monospace;
        color: #00FFC7;
        display: block;
        white-space: pre-wrap;
        word-wrap: break-word;
    }

    .article {
        background: rgba(255, 255, 255, 0.1);
        padding: 30px;
        border-radius: 10px;
        box-shadow: 0 4px 6px rgba(0, 0, 0, 0.2);
        margin-bottom: 40px;
    }

    .article h2 {
        font-size: 28px;
        color: #B91D73;
        margin-bottom: 15px;
    }

    .article h3 {
        font-size: 22px;
        color: #FF8F00;
        margin: 20px 0 10px;
    }

    .article p {
        font-size: 16px;
        color: #E0E0E0;
        margin-bottom: 15px;
    }

    .article img {
        width: 100%;
        border-radius: 8px;
        margin-bottom: 15px;
    }

    footer {
        text-align: center;
        padding: 30px 0;
        color: #FFFFFF;
        background: rgba(10, 36, 99, 0.8);
        border-radius: 15px;
    }

    footer p {
        font-size: 16px;
    }

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

        .hero {
            height: 250px;
        }

        .hero h2 {
            font-size: 24px;
        }

        .section h2 {
            font-size: 24px;
        }

        .card h3 {
            font-size: 20px;
        }

        .article h2 {
            font-size: 24px;
        }

        .article h3 {
            font-size: 20px;
        }
    }

    @media (max-width: 480px) {
        nav {
            flex-direction: column;
            gap: 10px;
        }

        .hero {
            height: 200px;
        }

        .hero h2 {
            font-size: 20px;
        }

        .section h2 {
            font-size: 20px;
        }

        .card h3 {
            font-size: 18px;
        }

        .article h2 {
            font-size: 20px;
        }

        .article h3 {
            font-size: 18px;
        }
    }

    @media (max-width: 320px) {
        header h1 {
            font-size: 24px;
        }

        .hero {
            height: 180px;
        }

        .hero h2 {
            font-size: 18px;
        }

        .section h2 {
            font-size: 18px;
        }

        .card h3 {
            font-size: 16px;
        }

        .article h2 {
            font-size: 18px;
        }

        .article h3 {
            font-size: 16px;
        }
    }