/* 全局样式 */
    body {
        margin: 0;
        padding: 0;
        font-family: 'Roboto', sans-serif;
        background: linear-gradient(135deg, #1e3c72, #2a5298);
        color: #ffffff;
        line-height: 1.6;
    }

    /* 导航栏 */
    .navbar {
        position: fixed;
        top: 0;
        width: 100%;
        background: rgba(0, 0, 0, 0.5);
        backdrop-filter: blur(10px);
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding: 10px 20px;
        z-index: 1000;
    }

    .navbar a {
        color: #ffffff;
        text-decoration: none;
        margin: 0 10px;
        transition: color 0.3s;
    }

    .navbar a:hover {
        color: #00ffff;
    }

    /* 主页横幅 */
    .banner {
        height: 100vh;
        display: flex;
        justify-content: center;
        align-items: center;
        background: url('https://images.gptkong.com/demo/sample1.png') no-repeat center center/cover;
        position: relative;
    }

    .banner::after {
        content: '';
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: rgba(30, 60, 114, 0.6);
    }

    .banner-content {
        position: relative;
        text-align: center;
        z-index: 1;
    }

    .banner h1 {
        font-size: 3em;
        margin-bottom: 20px;
    }

    .banner p {
        font-size: 1.2em;
        margin-bottom: 30px;
    }

    .banner .button {
        background: #00ffff;
        color: #000000;
        padding: 10px 20px;
        border: none;
        border-radius: 5px;
        text-decoration: none;
        transition: background 0.3s, transform 0.3s;
    }

    .banner .button:hover {
        background: #00cccc;
        transform: scale(1.1);
    }

    /* 主内容 */
    .container {
        padding: 100px 20px 50px 20px;
        max-width: 1200px;
        margin: auto;
    }

    .section {
        margin-bottom: 50px;
    }

    .section h2 {
        text-align: center;
        margin-bottom: 20px;
        font-size: 2em;
        border-bottom: 2px solid #ffffff;
        display: inline-block;
        padding-bottom: 10px;
    }

    .cards {
        display: flex;
        flex-wrap: wrap;
        justify-content: space-around;
    }

    .card {
        background: rgba(255, 255, 255, 0.1);
        border-radius: 10px;
        padding: 20px;
        margin: 10px;
        width: 300px;
        box-shadow: 0 4px 8px rgba(0,0,0,0.2);
        transition: transform 0.3s, background 0.3s;
    }

    .card:hover {
        transform: scale(1.05);
        background: rgba(255, 255, 255, 0.2);
    }

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

    .card h3 {
        margin-top: 15px;
        font-size: 1.5em;
    }

    .card p {
        margin-top: 10px;
        font-size: 1em;
    }

    /* 示例展示 */
    .example-section {
        background: rgba(0, 0, 0, 0.7);
        padding: 20px;
        border-radius: 10px;
    }

    .example-section h2 {
        text-align: center;
        margin-bottom: 20px;
    }

    .example-section pre {
        background: #2a2a2a;
        padding: 15px;
        border-radius: 5px;
        overflow-x: auto;
    }

    .example-section code {
        color: #00ffcc;
        font-family: 'Courier New', Courier, monospace;
    }

    /* 提示信息 */
    .hint {
        text-align: center;
        margin: 20px 0;
        font-size: 1.2em;
        color: #ffcc00;
    }

    /* 响应式设计 */
    @media (max-width: 1440px) {
        .banner h1 {
            font-size: 2.5em;
        }
    }

    @media (max-width: 1200px) {
        .cards {
            flex-direction: row;
        }
    }

    @media (max-width: 1024px) {
        .navbar a {
            margin: 0 5px;
        }
    }

    @media (max-width: 768px) {
        .cards {
            flex-direction: column;
            align-items: center;
        }

        .banner h1 {
            font-size: 2em;
        }
    }

    @media (max-width: 480px) {
        .banner h1 {
            font-size: 1.5em;
        }

        .card {
            width: 90%;
        }
    }

    @media (max-width: 320px) {
        .banner h1 {
            font-size: 1.2em;
        }

        .banner p {
            font-size: 1em;
        }
    }

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

    .animated-background {
        background: radial-gradient(circle, rgb(255, 87, 34), transparent);
        animation: aurora-move 15s linear infinite;
    }