body {
        margin: 0;
        font-family: 'Roboto', sans-serif;
        background: linear-gradient(135deg, #0A2463, #5C1D91);
        color: #E0E0E0;
        overflow-x: hidden;
        animation: gradientShift 15s infinite alternate;
    }

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

    .container {
        max-width: 1440px;
        margin: 0 auto;
        padding: 20px;
        display: flex;
        flex-direction: column;
        align-items: center;
    }

    header {
        position: relative;
        width: 100%;
        height: 400px;
        background: url('https://images.gptkong.com/demo/sample1.png') no-repeat center/cover;
        display: flex;
        justify-content: center;
        align-items: center;
        color: white;
        text-shadow: 0 4px 8px rgba(0, 0, 0, 0.5);
        overflow: hidden;
    }

    header::before {
        content: '';
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: rgba(0, 0, 0, 0.5);
        z-index: 1;
    }

    header h1 {
        font-size: 48px;
        font-weight: bold;
        z-index: 2;
        text-align: center;
    }

    .content {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
        gap: 20px;
        margin-top: 20px;
        width: 100%;
    }

    .card {
        background: rgba(255, 255, 255, 0.1);
        border-radius: 15px;
        box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
        padding: 20px;
        transition: all 0.3s ease;
        position: relative;
        overflow: hidden;
    }

    .card:hover {
        transform: scale(1.05);
        box-shadow: 0 8px 16px rgba(0, 0, 0, 0.3);
    }

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

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

    .card p {
        line-height: 1.6;
        font-size: 16px;
        color: #E0E0E0;
    }

    pre {
        background: rgba(0, 0, 0, 0.7);
        padding: 15px;
        border-radius: 10px;
        overflow-x: auto;
        font-family: 'Courier New', monospace;
        font-size: 14px;
        color: #00FFFF;
    }

    table {
        width: 100%;
        border-collapse: collapse;
        margin: 20px 0;
        background: rgba(255, 255, 255, 0.1);
        border-radius: 10px;
        overflow: hidden;
    }

    th, td {
        padding: 10px;
        text-align: left;
        border-bottom: 1px solid rgba(255, 255, 255, 0.2);
    }

    th {
        background: rgba(0, 0, 0, 0.5);
        color: #FFFFFF;
    }

    td {
        color: #E0E0E0;
    }

    footer {
        background: linear-gradient(to bottom, #0A2463, #5C1D91);
        color: white;
        padding: 20px;
        text-align: center;
        margin-top: 40px;
        font-size: 14px;
    }

    @media (max-width: 768px) {
        header h1 {
            font-size: 36px;
        }

        .card {
            padding: 15px;
        }

        pre {
            font-size: 12px;
        }
    }

    @media (max-width: 480px) {
        header {
            height: 300px;
        }

        header h1 {
            font-size: 28px;
        }

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

        .card p {
            font-size: 14px;
        }
    }