/* 全局样式 */
    * {
        margin: 0;
        padding: 0;
        box-sizing: border-box;
    }

    body {
        font-family: 'Roboto', sans-serif;
        background: linear-gradient(135deg, #001f3f, #0074D9);
        color: #333;
        line-height: 1.6;
        padding: 20px;
    }

    h1, h2, h3, h4, h5, h6 {
        font-family: 'Montserrat', sans-serif;
        color: #FFFFFF;
        margin-bottom: 15px;
    }

    a {
        color: #FF851B;
        text-decoration: none;
        transition: color 0.3s ease;
    }

    a:hover {
        color: #FFDC00;
    }

    /* 头部样式 */
    .header {
        text-align: center;
        padding: 50px 20px;
        background: radial-gradient(circle, rgba(0, 116, 217, 0.8), transparent);
        border-radius: 15px;
        margin-bottom: 40px;
    }

    .header h1 {
        font-size: 2.5em;
        margin-bottom: 10px;
    }

    .header p {
        font-size: 1.2em;
    }

    /* 主内容样式 */
    .container {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
        gap: 30px;
        padding: 20px;
    }

    .card {
        background: rgba(255, 255, 255, 0.1);
        border-radius: 10px;
        padding: 20px;
        box-shadow: 0 8px 16px rgba(0,0,0,0.3);
        backdrop-filter: blur(10px);
        transition: transform 0.3s ease, box-shadow 0.3s ease;
    }

    .card:hover {
        transform: translateY(-10px);
        box-shadow: 0 16px 32px rgba(0,0,0,0.5);
    }

    .card img {
        width: 100%;
        border-radius: 10px;
        margin-bottom: 15px;
    }

    .card h3 {
        margin-bottom: 10px;
    }

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

    /* 按钮样式 */
    .btn {
        display: inline-block;
        padding: 10px 20px;
        background: linear-gradient(45deg, #FF5733, #FFC300);
        color: #fff;
        border: none;
        border-radius: 25px;
        cursor: pointer;
        transition: background 0.3s ease, transform 0.3s ease;
        text-align: center;
        font-size: 1em;
    }

    .btn:hover {
        background: linear-gradient(45deg, #FFC300, #FF5733);
        transform: scale(1.05);
    }

    /* 文章样式 */
    .article {
        background: rgba(255, 255, 255, 0.2);
        padding: 30px;
        border-radius: 15px;
        margin-top: 40px;
        box-shadow: 0 8px 16px rgba(0,0,0,0.3);
        backdrop-filter: blur(10px);
    }

    .article h2 {
        font-size: 2em;
        margin-bottom: 20px;
        text-align: center;
    }

    .article p {
        margin-bottom: 15px;
        font-size: 1em;
    }

    .article pre {
        background: #2C3E50;
        color: #ECF0F1;
        padding: 15px;
        border-radius: 10px;
        overflow-x: auto;
        font-family: 'Courier New', Courier, monospace;
        margin-bottom: 15px;
    }

    .article code {
        font-family: 'Courier New', Courier, monospace;
        background: #34495E;
        color: #ECF0F1;
        padding: 2px 4px;
        border-radius: 4px;
    }

    /* 提示文本 */
    .reference {
        text-align: center;
        font-size: 1.2em;
        color: #FFDC00;
        margin-top: 50px;
    }

    /* 响应式设计 */
    @media (max-width: 1440px) {
        .header h1 {
            font-size: 2.2em;
        }

        .container {
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
        }
    }

    @media (max-width: 1200px) {
        .header {
            padding: 40px 15px;
        }

        .article {
            padding: 25px;
        }
    }

    @media (max-width: 1024px) {
        .header h1 {
            font-size: 2em;
        }

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

    @media (max-width: 768px) {
        .header h1 {
            font-size: 1.8em;
        }

        .container {
            grid-template-columns: 1fr;
        }

        .article {
            padding: 20px;
        }
    }

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

        .btn {
            width: 100%;
            padding: 10px 0;
        }

        .article h2 {
            font-size: 1.5em;
        }
    }

    @media (max-width: 320px) {
        body {
            padding: 10px;
        }

        .header h1 {
            font-size: 1.2em;
        }

        .article h2 {
            font-size: 1.2em;
        }
    }

    /* 关键帧动画 */
    @keyframes aurora-move {
        0% { background-position: 0% 50%; }
        50% { background-position: 100% 50%; }
        100% { background-position: 0% 50%; }
    }

    .animated-background {
        background: radial-gradient(circle, rgba(255,87,34,0.8), transparent);
        animation: aurora-move 15s linear infinite;
        height: 200px;
        border-radius: 50%;
        margin: 20px auto;
    }