/* 基础样式 */
    body {
        margin: 0;
        font-family: 'Roboto', 'Montserrat', sans-serif;
        background: radial-gradient(circle, rgb(0, 0, 51), rgb(0, 0, 102));
        color: #ffffff;
        overflow-x: hidden;
    }

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

    /* 头部 */
    header {
        text-align: center;
        padding: 50px 0;
        background: linear-gradient(135deg, #000033, #000066);
        box-shadow: 0 4px 8px rgba(0, 0, 0, 0.5);
    }

    header h1 {
        font-size: 2.5em;
        margin: 0;
        letter-spacing: 2px;
        color: #ff9900;
    }

    /* 导航 */
    nav {
        display: flex;
        justify-content: center;
        gap: 30px;
        margin: 20px 0;
    }

    nav a {
        text-decoration: none;
        color: #ffffff;
        font-weight: bold;
        transition: color 0.3s ease, text-shadow 0.3s ease;
    }

    nav a:hover {
        color: #ffcc00;
        text-shadow: 0 0 10px rgba(255, 204, 0, 0.7);
    }

    /* 主要内容 */
    main {
        display: flex;
        flex-wrap: wrap;
        gap: 20px;
    }

    .card {
        background: #1a1a2e;
        border-radius: 10px;
        padding: 20px;
        flex: 1 1 calc(33.333% - 40px);
        box-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
        transition: transform 0.3s ease, box-shadow 0.3s ease;
    }

    .card:hover {
        transform: translateY(-10px);
        box-shadow: 0 8px 16px rgba(255, 153, 0, 0.5);
    }

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

    .card h3 {
        margin-top: 15px;
        color: #ff9900;
    }

    .card p {
        line-height: 1.6;
    }

    /* 按钮 */
    .btn {
        display: inline-block;
        padding: 10px 20px;
        background-color: #ff9900;
        color: #ffffff;
        border: none;
        border-radius: 5px;
        text-decoration: none;
        font-weight: bold;
        transition: background-color 0.3s ease, box-shadow 0.3s ease;
    }

    .btn:hover {
        background-color: #ffcc00;
        box-shadow: 0 0 10px rgba(255, 204, 0, 0.7);
    }

    /* 示例展示 */
    .example {
        background: #000022;
        padding: 30px;
        border-radius: 10px;
        margin-top: 40px;
    }

    .example h2 {
        color: #ffcc00;
        margin-bottom: 20px;
    }

    .example pre {
        background: #1a1a2e;
        padding: 15px;
        border-radius: 5px;
        overflow-x: auto;
    }

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

    /* 响应式设计 */
    @media (max-width: 1440px) {
        .card {
            flex: 1 1 calc(50% - 40px);
        }
    }

    @media (max-width: 1024px) {
        .card {
            flex: 1 1 100%;
        }

        nav {
            flex-direction: column;
            gap: 15px;
        }
    }

    @media (max-width: 768px) {
        header h1 {
            font-size: 2em;
        }

        .example {
            padding: 20px;
        }
    }

    @media (max-width: 480px) {
        nav a {
            font-size: 0.9em;
        }

        .btn {
            padding: 8px 16px;
        }
    }

    @media (max-width: 320px) {
        header h1 {
            font-size: 1.5em;
        }

        .card {
            padding: 15px;
        }
    }

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

    body {
        animation: aurora-move 15s linear infinite;
        background-size: 400% 400%;
    }

    /* 代码块样式 */
    .code-example {
        background: #1a1a2e;
        padding: 20px;
        border-radius: 8px;
        overflow-x: auto;
    }

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

    /* 提示信息 */
    .note {
        text-align: center;
        padding: 20px;
        background: #000033;
        color: #ffcc00;
        font-size: 1.2em;
        border-top: 2px solid #ff9900;
    }