/* 基础样式设置 */
    body {
        margin: 0;
        padding: 0;
        font-family: 'Roboto', sans-serif;
        color: #ffffff;
        background: radial-gradient(circle, #1e90ff, #87ceeb, #ff69b4);
        background-size: 400% 400%;
        animation: gradient-animation 15s linear infinite;
    }
    
    @keyframes gradient-animation {
        0% { background-position: 0% 50%; }
        50% { background-position: 100% 50%; }
        100% { background-position: 0% 50%; }
    }

    h1, h2, h3, h4, h5, h6 {
        font-family: 'Montserrat', sans-serif;
        font-weight: bold;
        margin-bottom: 20px;
    }

    p {
        line-height: 1.6;
        margin-bottom: 20px;
        font-size: 16px;
    }

    a {
        color: #ff69b4;
        text-decoration: none;
    }

    a:hover {
        text-decoration: underline;
    }

    /* 容器样式 */
    .container {
        width: 90%;
        max-width: 1200px;
        margin: 0 auto;
        padding: 40px 0;
    }

    /* 首页横幅 */
    .banner {
        position: relative;
        text-align: center;
        padding: 100px 20px;
        background: url('https://images.gptkong.com/demo/sample1.png') no-repeat center center;
        background-size: cover;
        border-radius: 10px;
        margin-bottom: 40px;
    }

    .banner h1 {
        font-size: 48px;
        color: #ffffff;
        text-shadow: 2px 2px 4px rgba(0,0,0,0.5);
    }

    .banner p {
        font-size: 24px;
        margin-top: 20px;
        color: #f0f0f0;
    }

    /* 卡片式模块 */
    .cards {
        display: flex;
        flex-wrap: wrap;
        justify-content: space-between;
        margin-bottom: 40px;
    }

    .card {
        flex: 1 1 calc(33.333% - 20px);
        background: linear-gradient(135deg, #ff7e5f, #feb47b);
        border-radius: 10px;
        padding: 20px;
        margin: 10px;
        box-shadow: 0 4px 6px rgba(0,0,0,0.1);
        transition: transform 0.3s, box-shadow 0.3s;
    }

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

    .card h3 {
        margin-top: 0;
    }

    /* 数据可视化图表 */
    .charts {
        margin-bottom: 40px;
    }

    .chart {
        background: rgba(255, 255, 255, 0.1);
        padding: 20px;
        border-radius: 10px;
        margin-bottom: 20px;
    }

    /* 动态CTA按钮 */
    .cta-buttons {
        text-align: center;
        margin-bottom: 40px;
    }

    .cta-buttons a {
        display: inline-block;
        background: linear-gradient(135deg, #ff6a00, #ee0979);
        padding: 15px 30px;
        border-radius: 50px;
        color: #ffffff;
        font-size: 18px;
        margin: 10px;
        transition: box-shadow 0.3s, transform 0.3s;
    }

    .cta-buttons a:hover {
        box-shadow: 0 0 20px rgba(255, 106, 0, 0.6);
        transform: scale(1.05);
    }

    /* 教育专栏 */
    .education {
        margin-bottom: 40px;
    }

    .education article {
        background: rgba(0, 0, 0, 0.5);
        padding: 20px;
        border-radius: 10px;
        margin-bottom: 20px;
    }

    /* 用户反馈 */
    .feedback {
        background: url('https://images.gptkong.com/demo/sample2.png') no-repeat center center;
        background-size: cover;
        padding: 40px 20px;
        border-radius: 10px;
        margin-bottom: 40px;
    }

    .feedback h3 {
        text-align: center;
        margin-bottom: 20px;
    }

    .feedback p {
        font-style: italic;
        text-align: center;
    }

    /* 响应式设计 */
    @media (max-width: 1440px) {
        .card {
            flex: 1 1 calc(33.333% - 20px);
        }
    }

    @media (max-width: 1200px) {
        .card {
            flex: 1 1 calc(50% - 20px);
        }
    }

    @media (max-width: 768px) {
        .card {
            flex: 1 1 100%;
        }

        .banner {
            padding: 60px 20px;
        }

        .banner h1 {
            font-size: 32px;
        }

        .banner p {
            font-size: 18px;
        }
    }

    @media (max-width: 480px) {
        .cta-buttons a {
            padding: 10px 20px;
            font-size: 16px;
        }

        p {
            font-size: 14px;
        }
    }

    @media (max-width: 320px) {
        .container {
            padding: 20px 10px;
        }

        .banner h1 {
            font-size: 24px;
        }

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

        .cta-buttons a {
            padding: 8px 16px;
            font-size: 14px;
        }
    }

    /* 视觉冲击元素 */
    .visual-impact {
        position: relative;
        background: url('https://images.gptkong.com/demo/sample3.png') no-repeat center center;
        background-size: cover;
        height: 300px;
        border-radius: 10px;
        margin-bottom: 40px;
    }

    /* 示例展示文章 */
    .sample-article {
        background: rgba(0, 0, 0, 0.7);
        padding: 20px;
        border-radius: 10px;
        margin-bottom: 40px;
    }

    .sample-article code {
        display: block;
        background: #2d2d2d;
        padding: 10px;
        border-radius: 5px;
        overflow-x: auto;
        margin-bottom: 20px;
        font-family: 'Courier New', Courier, monospace;
    }

    /* 提示文字 */
    .reference-note {
        text-align: center;
        font-size: 18px;
        margin-bottom: 40px;
    }