/* 全局样式 */
    body {
        margin: 0;
        padding: 0;
        font-family: 'Roboto', sans-serif;
        background: radial-gradient(circle, #0A192F, #645CAA);
        color: #ffffff;
    }

    /* 头部样式 */
    header {
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding: 20px 40px;
        background: rgba(10, 25, 47, 0.8);
        position: fixed;
        width: 100%;
        top: 0;
        z-index: 1000;
    }

    header h1 {
        font-family: 'Poppins', sans-serif;
        font-size: 24px;
    }

    /* 导航菜单 */
    nav ul {
        list-style: none;
        display: flex;
        gap: 20px;
    }

    nav ul li a {
        text-decoration: none;
        color: #FFC700;
        font-weight: bold;
        transition: color 0.3s;
    }

    nav ul li a:hover {
        color: #B8E986;
    }

    /* Hero Section */
    .hero {
        height: 100vh;
        background: url('https://images.gptkong.com/demo/sample1.png') center center / cover no-repeat;
        display: flex;
        flex-direction: column;
        justify-content: center;
        align-items: center;
        text-align: center;
        padding: 0 20px;
    }

    .hero h2 {
        font-family: 'Poppins', sans-serif;
        font-size: 48px;
        margin-bottom: 20px;
        color: #FFC700;
    }

    .hero p {
        font-size: 18px;
        margin-bottom: 30px;
        max-width: 600px;
    }

    .hero .cta-button {
        background-color: #FFC700;
        color: #0A192F;
        border: none;
        padding: 15px 30px;
        font-size: 18px;
        border-radius: 25px;
        cursor: pointer;
        position: relative;
        overflow: hidden;
        transition: background-color 0.3s, transform 0.3s;
    }

    .hero .cta-button:hover {
        background-color: #B8E986;
        transform: scale(1.05);
    }

    .hero .cta-button::after {
        content: '';
        position: absolute;
        width: 100%;
        height: 100%;
        top: 0;
        left: 0;
        background: rgba(255, 255, 255, 0.3);
        border-radius: 50%;
        transform: scale(0);
        animation: ripple 0.6s ease-out;
    }

    @keyframes ripple {
        0% { transform: scale(0); opacity: 1; }
        100% { transform: scale(2.5); opacity: 0; }
    }

    /* 主内容 */
    .content {
        padding: 120px 40px 40px 40px;
        max-width: 1200px;
        margin: 0 auto;
    }

    .content h2 {
        font-family: 'Poppins', sans-serif;
        font-size: 36px;
        margin-bottom: 20px;
        color: #FFC700;
    }

    .content p {
        font-size: 16px;
        line-height: 1.8;
        margin-bottom: 20px;
    }

    .content pre {
        background: #0A192F;
        padding: 15px;
        border-radius: 8px;
        overflow-x: auto;
        margin-bottom: 20px;
    }

    .content code {
        color: #B8E986;
        font-family: 'Courier New', Courier, monospace;
    }

    /* 卡片式设计 */
    .cards {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
        gap: 20px;
        margin-bottom: 40px;
    }

    .card {
        background: #645CAA;
        border-radius: 12px;
        padding: 20px;
        box-shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
        transition: transform 0.3s, box-shadow 0.3s;
    }

    .card:hover {
        transform: scale(1.05);
        box-shadow: 0 8px 12px rgba(0, 0, 0, 0.5);
    }

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

    .card h3 {
        font-family: 'Poppins', sans-serif;
        font-size: 24px;
        margin-bottom: 10px;
        color: #FFC700;
    }

    .card p {
        font-size: 14px;
        line-height: 1.6;
    }

    /* 示例展示 */
    .example-section {
        background: rgba(184, 233, 134, 0.1);
        padding: 40px;
        border-radius: 12px;
    }

    .example-section h2 {
        color: #FFC700;
    }

    /* 图片展示 */
    .image-gallery {
        display: flex;
        flex-wrap: wrap;
        gap: 10px;
        margin-bottom: 40px;
    }

    .image-gallery img {
        width: 100%;
        max-width: 150px;
        border-radius: 8px;
    }

    /* 提示语 */
    .note {
        background: rgba(255, 199, 0, 0.2);
        padding: 20px;
        border-left: 5px solid #FFC700;
        margin-bottom: 40px;
        border-radius: 5px;
    }

    /* 响应式设计 */
    @media (max-width: 1440px) {
        .hero h2 {
            font-size: 42px;
        }

        .content h2 {
            font-size: 32px;
        }
    }

    @media (max-width: 1200px) {
        header {
            padding: 15px 30px;
        }

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

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

        .hero .cta-button {
            padding: 12px 25px;
            font-size: 16px;
        }
    }

    @media (max-width: 1024px) {
        .cards {
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
        }

        .hero h2 {
            font-size: 32px;
        }
    }

    @media (max-width: 768px) {
        header {
            flex-direction: column;
            align-items: flex-start;
        }

        nav ul {
            flex-direction: column;
            gap: 10px;
        }

        .hero h2 {
            font-size: 28px;
        }

        .content {
            padding: 100px 20px 20px 20px;
        }
    }

    @media (max-width: 480px) {
        .hero h2 {
            font-size: 24px;
        }

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

        .hero .cta-button {
            padding: 10px 20px;
            font-size: 14px;
        }

        .content h2 {
            font-size: 28px;
        }
    }

    @media (max-width: 320px) {
        .hero h2 {
            font-size: 20px;
        }

        .hero p {
            font-size: 12px;
        }

        .hero .cta-button {
            padding: 8px 16px;
            font-size: 12px;
        }

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

    /* 动画效果 */
    @keyframes aurora-move {
        0% { background-position: 0% 50%; }
        50% { background-position: 100% 50%; }
        100% { background-position: 0% 50%; }
    }

    .animated-background {
        animation: aurora-move 15s linear infinite;
    }